An explosion-proof cable drum suitable for use in a dust zone

Abstract

The utility model discloses a kind of explosion-proof cable drum suitable for dust area, belong to dangerous environment explosion-proof electrical equipment technical field, including cable drum assembly, drive assembly, explosion-proof box assembly, sealing assembly and limiting component, explosion-proof box assembly is rotatably connected with cable drum assembly, cable drum assembly passes through the box body wall of explosion-proof box assembly. Drive assembly is drivingly connected with cable drum assembly, drive assembly is arranged between cable drum assembly and explosion-proof box assembly, and drive assembly is electrically connected with explosion-proof box assembly. Sealing assembly is arranged in the connecting gap of cable drum assembly and the box body wall of explosion-proof box assembly. Limiting component is installed in the inside of cable drum assembly, and limiting component is electrically connected with explosion-proof box assembly. The problems of existing technology explosion-proof unreliable, structure heavy and cable easy to wear and stack are solved. With explosion-proof safety, structure lightweight, cable wire arrangement neat and orderly and the like advantages.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof electrical equipment in hazardous environments, specifically to an explosion-proof cable reel suitable for dusty areas. Background Technology

[0002] In hazardous industrial areas such as petrochemical, coal mining, and metallurgy industries where flammable and explosive dust or gases are present, cable reels are crucial devices for ensuring power supply and signal transmission for mobile equipment. However, such environments place extremely high explosion-proof safety requirements on electrical equipment. Ordinary cable reels may generate sparks, arcs, or high temperatures during the operation of their internal electrical components, posing a risk of explosion if used directly.

[0003] Currently, although some explosion-proof cable reels are available on the market, they still have several shortcomings in practical applications. Firstly, structurally, they are often complex and redundant, resulting in bulky and heavy equipment that is extremely inconvenient to install and move in confined spaces such as underground mines and equipment areas. Secondly, they have shortcomings in explosion-proof reliability; for example, the parameters of the explosion-proof joint surface may not meet standards, and the sealing components at the cable inlet / outlet and the shaft are prone to aging and failure under dust and corrosive media, potentially allowing explosive media to enter and even posing safety hazards. Furthermore, they are insufficient in functionality and adaptability; the lack of effective management of cable winding and unwinding easily leads to cable stacking and wear.

[0004] Therefore, how to provide an explosion-proof cable reel suitable for dusty areas and overcome the defects of existing structures is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides an explosion-proof cable reel suitable for dusty areas to solve the problems in the prior art, which are caused by the complex and redundant structure design of existing explosion-proof reels, the shortcomings of explosion-proof links, poor environmental adaptability, heavy weight, inconvenience of installation and movement, safety hazards, easy wear and stacking of cables, and inability to adapt to different working conditions in the long term.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses an explosion-proof cable reel suitable for dusty areas, comprising: An explosion-proof enclosure assembly is rotatably connected to a cable reel assembly, which passes through the enclosure wall of the explosion-proof enclosure assembly; A drive assembly is connected to the cable reel assembly in a driving manner. The drive assembly is disposed between the cable reel assembly and the explosion-proof box assembly, and is electrically connected to the explosion-proof box assembly. A sealing component is disposed in the connection gap between the cable reel assembly and the explosion-proof box assembly housing wall; A limiting component is installed inside the cable reel assembly, and the limiting component is electrically connected to the explosion-proof box assembly.

[0007] In one possible implementation, the cable reel assembly includes: The hub has a cable winding frame installed on its arc-shaped outer wall, and a rotating shaft is installed on the outer wall in the axial direction of the hub. The arc-shaped outer wall of the hub has a second sliding groove, and the second sliding groove is provided with several grooves. The first spoke has one end fixedly connected to the arc-shaped outer wall of the hub, and the other end of the first spoke has a rim fixedly connected to it. The second spoke has a third slider installed at one end, which is slidably connected in the second groove, and a rim is fixedly connected to the other end of the second spoke. The cable winding frame is disposed between the first spoke and the second spoke.

[0008] In one possible implementation, the driving component includes: The gearbox has its output end connected to the cable reel assembly for transmission. Explosion-proof motors are installed in pairs on the side wall of the gearbox, and the output end of the explosion-proof motor is connected to the input end of the gearbox via a coupling. The explosion-proof motor is electrically connected to the explosion-proof box assembly.

[0009] In one possible implementation, the explosion-proof enclosure assembly includes: The explosion-proof enclosure is fitted with a lid on top. Cable holes are provided on the side wall of the explosion-proof enclosure; A shaft hole is formed on the side wall of the explosion-proof enclosure. A sealing assembly is provided in the shaft hole. The cable reel assembly passes through the sealing assembly and is disposed in the shaft hole. An installation plate is mounted on the explosion-proof enclosure. A control unit is mounted on the installation plate. The control unit is electrically connected to the drive assembly and the limit assembly. An observation window is provided on the side wall of the explosion-proof enclosure.

[0010] In one possible implementation, the sealing assembly includes: A sealing connector, threaded onto the cable hole; A sealing gasket is installed on the mating surface between the explosion-proof enclosure and the enclosure cover; An outer sealing ring, which is lip-shaped, is disposed in the shaft hole, with the lip of the outer sealing ring facing the outside of the explosion-proof enclosure. A bearing is disposed inside the outer sealing ring, and an inner sealing ring is disposed inside the bearing. The inner sealing ring is lip-shaped, and the lip of the inner sealing ring faces the inside of the explosion-proof enclosure. The cable reel assembly is inserted inside the inner sealing ring.

[0011] In one possible implementation, the limiting component includes: The slide rail housing is integrally formed with the first wheel spoke, and the slide rail housing is provided with several parts; A drive motor is installed inside the slide rail housing. The output end of the drive motor is connected to a lead screw, and the lead screw is connected to a first slider. The first slider is disposed inside the slide rail housing and slides in cooperation with the slide rail housing. The drive motor is electrically connected to the explosion-proof box assembly. The second slider is slidably engaged with the slide rail housing; A cable support frame is installed on the outer wall of the second slider facing the cable, and a pressure sensor is provided on the outer wall of the cable support frame facing the cable direction; A cylinder is installed between the first wheel spoke and the second wheel spoke. The cylinder is located inside the cable winding frame, and several cylinders are provided.

[0012] In one possible implementation, the slide rail housing includes: The slide rail housing body is integrally formed with the first wheel spoke, and the drive motor is mounted on the side wall of the slide rail housing body; A limiting plate is installed on the side wall of the slide rail housing body, and the drive motor is located inside the limiting plate; The slide rails are arranged in pairs and installed on the side wall of the slide rail housing body, with the slide rails located outside the lead screw. A limiting groove extends through the upper and lower walls of the slide rail, and the limiting groove is slidably connected to the second slider.

[0013] In one possible implementation, the first slider includes: The first slider body has a through threaded hole, which is threadedly connected to the lead screw. The third slide groove is provided in pairs and is formed on the side wall of the first slider body. The third slide groove is slidably connected to the second slider.

[0014] In one possible implementation, the second slider includes: The first limiting slider has a first limiting slider integrally formed on both outer walls in the vertical direction. The first limiting sliders are arranged in pairs and slide in cooperation with the limiting groove. The connecting plate has its horizontal sidewall connected to the first limiting slider via a spring. The connecting plate has two vertical ends integrally formed with second limiting sliders. The second limiting sliders are arranged in pairs and abut against the outer wall of the slide rail. The second limiting sliders slide in cooperation with the slide rail. The cable support frame is installed on the horizontal side wall of the connecting plate, and the cable support frame and the spring are arranged on opposite sides. The third limiting slider is installed on the horizontal side wall of the connecting plate. The plane where the third limiting slider is located is perpendicular to the plane where the cable support frame is located. The third limiting slider is slidably connected to the third sliding groove.

[0015] This utility model has the following advantages: This invention addresses the safety hazards of unreliable explosion-proof features in traditional reel systems in dust explosion environments. The double-lip sealed bearing design ensures the long-term effectiveness of dynamic sealing. The lightweight structure with hollowed-out spokes reduces weight while maintaining strength, improving ease of installation and movement in confined spaces. The limiting component, driven by a lead screw, prevents cable loosening and stacking. A temperature-adaptive adjustment function is introduced, using a cylinder to fine-tune the spoke spacing to compensate for natural thermal expansion and contraction, resolving issues of cable wear and stacking caused by winding tangles and temperature stress. Ultimately, this invention combines explosion-proof safety, lightweight structure, intelligent and stable operation, and broad environmental adaptability, reliably serving various hazardous working conditions in mining, petrochemical, and metallurgical industries. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 A perspective view of an explosion-proof cable reel suitable for dusty areas provided by this utility model; Figure 2A perspective view of the limiting component and sealing component provided by this utility model; Figure 3 A perspective view of the cable reel assembly provided by this utility model; Figure 4 Provided by this utility model Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 A perspective view of the drive component provided by this utility model; Figure 6 A perspective view of the explosion-proof box assembly provided by this utility model; Figure 7 A perspective view of the outer sealing ring, bearing, and inner sealing ring provided for this utility model; Figure 8 Cross-sectional view of the limiting component provided by this utility model Figure 9 A perspective view of the slide rail housing, cable support frame, first slider, and second slider provided by this utility model; Figure 10 A cross-sectional view of the cable support frame in its retracted state provided by this utility model; Figure 11 A cross-sectional view of the cable support frame in motion provided by this utility model; Figure 12 A cross-sectional view of the cable support frame in its supporting state provided by this utility model; Figure 13 A perspective view of the first slider provided for this utility model; Figure 14 A perspective view of the second slider provided by this utility model; Figure 15 A perspective view of the third limiting slider provided by this utility model; In the diagram: 1. Cable reel assembly; 11. Hub; 12. First spoke; 13. Second spoke; 14. Flange; 15. Second slide rail; 16. Third slider; 17. Cable winding frame; 18. Shaft; 2. Drive assembly; 21. Gearbox; 22. Explosion-proof motor; 3. Explosion-proof enclosure assembly; 31. Flameproof enclosure; 32. Shaft hole; 33. Observation window; 34. Enclosure cover; 4. Sealing assembly; 41. Outer sealing ring; 42. Bearing; 43. Inner sealing ring; 5. Limiting assembly; 51. Slide rail 511 Slide rail housing body; 512 Slide rail; 513 Limiting plate; 514 Limiting groove; 52 Drive motor; 53 Lead screw; 55 Cable support frame; 56 First slider; 561 First slider body; 562 Threaded hole; 563 Third slide groove; 57 Second slider; 571 First limiting slider; 572 Connecting plate; 573 Limiting block; 574 Second limiting slider; 575 Spring; 576 Third limiting slider; 59 Cylinder. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please refer to Figures 1-15 The present invention discloses an explosion-proof cable reel suitable for dusty areas, as follows: Figure 1 and Figure 2The device includes a cable reel assembly 1, a drive assembly 2, an explosion-proof box assembly 3, a sealing assembly 4, and a limiting assembly 5. The explosion-proof box assembly 3 is rotatably connected to the cable reel assembly 1, and the cable reel assembly 1 passes through the box wall of the explosion-proof box assembly 3. The drive assembly 2 is drively connected to the cable reel assembly 1 and is located between the cable reel assembly 1 and the explosion-proof box assembly 3. The drive assembly 2 is electrically connected to the explosion-proof box assembly 3. The sealing assembly 4 is located in the connection gap between the cable reel assembly 1 and the box wall of the explosion-proof box assembly 3. The limiting assembly 5 is installed inside the cable reel assembly 1 and is electrically connected to the explosion-proof box assembly 3.

[0023] The cable reel assembly 1 guides the cable in a single layer and neat arrangement, avoiding wear problems caused by tangled and disordered winding. Meanwhile, multiple radially arranged high-strength metal rods ensure support strength while achieving weight reduction, making it easier to move and install the equipment in confined spaces such as underground mines. The perforated structure also facilitates heat dissipation.

[0024] Drive component 2 uses an explosion-proof motor that meets explosion-proof standards, ensuring that potential internal sparks will not leak out and ignite the environment. Combined with a worm gear transmission mechanism, it converts the motor power into the rotational power required by the reel, achieving smooth cable winding and unwinding and adapting to mobile power supply needs under various working conditions.

[0025] The explosion-proof enclosure assembly 3 uses a thick-walled cast iron enclosure with an explosion-proof joint surface between the cover and the enclosure that is wider than 15 mm, enabling it to withstand and isolate potential internal electrical explosions. The enclosure integrates all control units, including the PLC and relays. This design improves structural compactness and explosion-proof reliability, while providing convenience and safety through explosion-proof observation windows and wiring terminals.

[0026] The sealing assembly 4 is a line of defense against the intrusion of hazardous media. It uses an explosion-proof sealing joint at the interface where the cable enters and exits the enclosure to achieve a seal. The shaft 18 of the reel passes through the side wall of the enclosure and uses a double-lip sealed bearing. The inner sealing lip prevents internal impurities from leaking out, while the outer sealing lip blocks external dust from entering, solving the defects of traditional dynamic seals that are prone to wear and leakage.

[0027] The limiting component 5 has two functions. First, the driven cable support frame 55 moves axially at the end of winding and extends from the first spoke (12) until it abuts the cable, which, together with the first and second spokes, brings the cable together neatly to prevent it from loosening. Second, this mechanism, controlled by a control unit through a miniature cylinder and temperature sensor located between the spokes, can automatically adjust the spoke spacing when the ambient temperature changes, compensating for the thermal expansion and contraction of the cable, avoiding excessively tight or loose stacking of the cable due to temperature, and significantly extending the cable life.

[0028] In a specific embodiment, such as Figure 3 and Figure 4 The cable reel assembly 1 includes a hub 11, a first spoke 12, a second spoke 13, a rim 14, a second groove 15, a third slider 16, a cable winding frame 17, and a rotating shaft 18. The cable winding frame 17 is mounted on the arc-shaped outer wall of the hub 11, and the rotating shaft 18 is mounted on the outer wall of the hub 11 along its axial direction. The arc-shaped outer wall of the hub 11 has several second grooves 15. One end of the first spoke 12 is fixedly connected to the arc-shaped outer wall of the hub 11, and the other end is fixedly connected to the rim 14. One end of the second spoke 13 has the third slider 16 mounted on it, which is slidably connected in the second groove 15. The other end of the second spoke 13 is fixedly connected to the rim 14. The cable winding frame 17 is positioned between the first spoke 12 and the second spoke 13.

[0029] The cable winding rack 17 on the outer wall of the hub 11 is a structure that ensures the cables are arranged in an orderly, single-layer, and tightly packed manner. It effectively prevents the cables from stacking, knotting, and abnormally wearing during winding and unwinding. The rotating shaft 18 at the center of the hub 11 is the power input interface, connected to the drive assembly 2, which drives the entire cable reel assembly 1 to rotate. A second groove 15 is formed on the arc-shaped outer wall of the hub 11, providing a guide track for the second spoke 13.

[0030] The first spoke 12 and the second spoke 13 form a hollow spoke structure. One end of the first spoke 12 is fixed to the outer wall of the arc surface of the hub 11, and the other end is connected to the rim 14. As the main support member, it reduces weight and facilitates heat dissipation while ensuring the overall structural strength. The second spoke 13 is a movable component for distance adjustment. One end of it is slidably connected to the second groove 15 on the hub through the third slider 16, allowing it to move along the hub axis. The other end of it is also connected to the rim 14.

[0031] When changes in ambient temperature cause the cable to expand and contract due to heat, the limiting component 5 drives the second spoke 13 to move, and the third slider 16 slides along the second groove 15, causing local deformation of the second spoke 13 and the connected rim 14. This fine adjustment avoids the cable being squeezed too tightly or piled too loosely due to temperature, solving the inherent defects of traditional reels in this regard.

[0032] In a specific embodiment, such as Figure 5 The drive assembly 2 includes a gearbox 21 and an explosion-proof motor 22. The output end of the gearbox 21 is connected to the cable reel assembly 1 for transmission. The explosion-proof motors 22 are arranged in pairs and installed on the side wall of the gearbox 21. The output end of the explosion-proof motor 22 is connected to the input end of the gearbox 21 for transmission via a coupling. The explosion-proof motors 22 are electrically connected to the explosion-proof box assembly 3.

[0033] The explosion-proof motor 22 has a housing with sufficient mechanical strength and precise joint surfaces. Even if an electrical spark is generated inside the motor due to a circuit fault or commutation and ignites, its robust explosion-proof housing can contain the explosion inside, thus ensuring that it will not become an ignition source in a flammable and explosive dust environment, ensuring safety from the power source.

[0034] The gearbox 21 is the mechanism for power conversion and control. The explosion-proof motor 22 typically operates at high speeds; directly driving the reel would result in excessively fast winding and unwinding speeds, making it difficult to control and easily causing cable damage or stacking. It uses an internal gear set to convert the high-speed input from the motor into the low-speed output required by the reel shaft.

[0035] In a specific embodiment, such as Figure 6 The explosion-proof enclosure assembly 3 includes an explosion-proof enclosure 31, a shaft hole 32, an observation window 33, a cover 34, a cable hole, a mounting plate, and a control unit. The cover 34 is connected to the top of the explosion-proof enclosure 31. The cable hole is located on the side wall of the explosion-proof enclosure 31. The shaft hole 32 is located on the side wall of the explosion-proof enclosure 31, and a sealing assembly 4 is disposed within the shaft hole 32. The cable reel assembly 1 passes through the sealing assembly 4 and is disposed within the shaft hole 32. The mounting plate is mounted on the explosion-proof enclosure 31, and a control unit is mounted on the mounting plate. The control unit is electrically connected to the drive assembly 2 and the limit assembly 5. The observation window 33 is located on the side wall of the explosion-proof enclosure 31.

[0036] The explosion-proof enclosure 31 and the cover 34 together form an explosion-proof barrier. They are made of thick-walled cast iron and machined with explosion-proof mating surfaces to ensure a width greater than 15 mm for a tight seal. This structure can withstand and imprison any explosions that may occur from the internal electrical components, ensuring that flames and high-temperature gases cannot escape, thus protecting the external hazardous environment. To achieve this function, the enclosure is designed with several key interfaces. The shaft hole 32 is the power input channel for the reel shaft 18, and a special sealed bearing must be installed inside to achieve a dynamic explosion-proof seal while allowing shaft rotation. The cable hole is the inlet and outlet for external power and control cables, requiring the use of explosion-proof sealing joints to achieve a static seal on the cables through compression sealing rings. The sealing of these two holes is the line of defense against the intrusion of external explosive media. Inside the enclosure, the mounting plate integrates and fixes all electrical components. The control unit (including PLC, relays, etc.) mounted on it is responsible for receiving commands and controlling the start / stop, speed, and operation of the explosion-proof motor and the limit assembly 5.

[0037] The observation window 33 is made of thick explosion-proof glass and sealant, allowing operators to visually inspect the working status of internal components and indicator lights without opening the enclosure. This greatly facilitates daily maintenance and troubleshooting while maintaining the integrity of the enclosure's explosion-proof performance.

[0038] In a specific embodiment, such as Figure 7The sealing assembly 4 includes an outer sealing ring 41, a bearing 42, an inner sealing ring 43, a sealing joint, and a sealing gasket. The sealing joint is threaded onto the cable hole. The sealing gasket is installed on the mating surface between the explosion-proof enclosure 31 and the enclosure cover 34. The outer sealing ring 41 is lip-shaped and is disposed within the shaft hole 32, with the lip of the outer sealing ring 41 facing outward from the explosion-proof enclosure 31. The bearing 42 is disposed inside the outer sealing ring 41, and an inner sealing ring 43 is disposed inside the bearing 42. The inner sealing ring 43 is lip-shaped, with the lip of the inner sealing ring 43 facing inward from the explosion-proof enclosure 31. The cable reel assembly 1 is inserted inside the inner sealing ring 43.

[0039] The sealing gasket is installed between the mating surfaces of the explosion-proof enclosure 31 and the enclosure cover 34. As a static seal, it fills the microscopic unevenness of the machined area, ensuring the airtightness of the explosion-proof mating surface when closed, and is a guarantee for maintaining the overall explosion-proof performance of the enclosure.

[0040] The sealing joint is installed at the cable hole of the explosion-proof enclosure 31 to seal the cable passing through it. It uses an internal elastic sealing ring to generate radial compression when tightened, thereby tightly wrapping and fitting the outer sheath of the cable, forming a static through seal to prevent external explosive dust or gas from seeping into the interior of the enclosure along the cable surface.

[0041] Bearing 42 is installed in the shaft hole of the housing, and its function is to support the rotating shaft 18 of the reel, ensuring its smooth rotation. The sealing function is achieved by the structures on both sides. The outer sealing ring 41 is designed with a lip-shaped structure, with its lip facing the external environment of the housing. Its function is to prevent the intrusion of external dust and contaminants through an interference fit. The inner sealing ring 43 is also a lip-shaped structure, but its lip faces the inside of the housing. Its function is different from that of the outer sealing ring; it mainly focuses on sealing the internal space to prevent explosive substances present in the housing from leaking outwards along the axis. The two sealing lips, one inner and one outer, constitute a two-way sealing structure.

[0042] In a specific embodiment, such as Figures 8-10The limiting component 5 includes a slide rail housing 51, a drive motor 52, a lead screw 53, a cable support frame 55, a first slider 56, a second slider 57, and a cylinder 59. The slide rail housing 51 is integrally formed with the first spoke 12, and several cylinders are provided in the slide rail housing 51. The drive motor 52 is installed inside the slide rail housing 51, and the output end of the drive motor 52 is driven by the lead screw 53. The lead screw 53 is threadedly driven by the first slider 56, which is located inside the slide rail housing 51 and slides in cooperation with the slide rail housing 51. The drive motor 52 is electrically connected to the explosion-proof box component 3. The second slider 57 slides in cooperation with the slide rail housing 51. The cable support frame 55 is installed on the outer wall of the second slider 57 facing the cable, and a pressure sensor is provided on the outer wall of the cable support frame 55 facing the cable. Several cylinders 59 are installed between the first spoke 12 and the second spoke 13, and are located inside the cable winding frame 17.

[0043] The slide rail housing 51 is integrally formed on the inner side of the first wheel spoke 12, which provides a spatial basis for subsequent motion conversion. The slide rail housing 51 establishes the most basic axial motion direction for the entire mechanism.

[0044] The drive motor 52 serves as the power source for the limit function. It receives control signals from the explosion-proof control box assembly 3 and outputs rotational power, acting as the initial component to drive the entire limit structure to start working.

[0045] The lead screw 53, as a transmission element, converts the rotational force of the drive motor 52 into the linear motion of the first slider 56 along the axial direction, thus realizing the conversion of the power form from rotation to linear motion.

[0046] The cable support bracket 55 is a limiting actuator used to contact and hold the outermost layer of the wound cable to prevent it from coming loose. Its curved surface design is slightly larger than the cable's outer diameter, so that the cable can still be held in place even after temperature compensation. A pressure sensor on it provides a contact signal, which the control system uses to stop the drive motor 52.

[0047] The first slider 56 is a component for power transmission and limiting. It connects to the lead screw 53 via threads to convert rotational power into its own linear motion. At the same time, the groove structure on its side guides and constrains some of the motion degrees of freedom of the second slider 57.

[0048] The second slider 57 is the component responsible for changing the direction of motion. Through the combined cooperation of multiple internal sliders with the slide rail housing 51 and the first slider 56, it synthesizes the axial linear motion transmitted from the first slider 56 into the power to drive the cable support frame 55 to move along a specific oblique path, thereby realizing the action of protruding from the inside of the first wheel spoke 12.

[0049] Cylinder 59 is the actuator for temperature adaptive regulation. The extension and retraction of multiple cylinders 59 drives the second spokes to produce a slight displacement, thereby adjusting the spoke spacing to compensate for changes in the cable caused by thermal expansion and contraction, preventing the cable from being too tight or too loose, and thus reducing damage caused by friction.

[0050] In a specific embodiment, such as Figure 9 and Figure 10 The slide rail housing 51 includes a slide rail housing body 511, slide rails 512, a limiting plate 513, and a limiting groove 514. The slide rail housing body 511 is integrally formed with the first wheel spoke 12. The drive motor 52 is mounted on the side wall of the slide rail housing body 511. The limiting plate 513 is mounted on the side wall of the slide rail housing body 511, and the drive motor 52 is located inside the limiting plate 513. The slide rails 512 are arranged in pairs and mounted on the side wall of the slide rail housing body 511, with the slide rails 512 located outside the lead screw 53. The limiting groove 514 passes through the upper and lower walls of the slide rails 512 and is slidably connected to the second slider 57.

[0051] The slide rail housing body 511 is integrally formed along the axis of the first wheel spoke 12, and its function is to provide installation space and fixed support frame for moving parts.

[0052] The slide rails 512 are arranged in pairs on the upper and lower inner walls of the slide rail housing body 511. Their function is to provide a specific inclined plane motion trajectory. Their horizontal cross-section is trapezoidal, and the first end has an arc-shaped groove, allowing the second limiting slider 574 on the second slider 57 to slide along the inclined plane, converting axial motion into the required radial displacement. This serves as a guide rail for the inclined extension of the drive cable support frame 55. The groove serves as the initial accommodating space for the second limiting slider 574.

[0053] The limiting plate 513 is installed at the front end of the slide rail housing body 511. Its function is to form a complete guide rail and cavity together with the slide rail 512. The drive motor 52 is installed in the cavity inside the limiting plate 513.

[0054] A limiting groove 514 is formed through the slide rail 512. Its function is to form a sliding and limiting engagement with the limiting block 573 on the second slider 57. This engagement restricts the first limiting slider 571 to slide only along the axial direction of the slide rail housing 51, and prevents it from moving radially.

[0055] In a specific embodiment, such as Figure 13 The first slider 56 includes a first slider body 561, a threaded hole 562, and a third slide groove 563. The first slider body 561 has a through threaded hole 562, which is threadedly connected to the lead screw 53. The third slide groove 563 is arranged in pairs and is formed on the side wall of the first slider body 561. The third slide groove 563 is slidably connected to the second slider 57.

[0056] The function of the first slider body 561 is to support the threaded hole 562 and the third slide groove 563, forming a whole, thereby transmitting the driving force from the lead screw 53 to the second slider 57.

[0057] The threaded hole 562 is the power input component for the first slider 56. It is threadedly engaged with the lead screw 53, and its function is to convert the rotational motion of the lead screw 53 into the linear motion of the first slider 56. This motion is the first step in the entire kinematic chain of the limiting mechanism, and it is also the motion form conversion that serves as the motion reference.

[0058] The third slide groove 563 is arranged in pairs on the side wall of the first slider body 561, forming a sliding and limiting engagement with the third limiting slider 576 on the second slider 57. It serves two purposes: first, it transmits the linear motion of the first slider 56 to the second slider 57, causing it to move; second, it applies trajectory constraints to the connecting plate 572 and the second limiting slider 574 on the second slider 57, restricting their degrees of freedom of movement in the direction perpendicular to the axis, ensuring that they can only move along the path defined by the first slider 56, thus creating a restricted composite motion with subsequent movement on the inclined rail.

[0059] In a specific embodiment, such as Figure 14 and 15 The second slider 57 includes a first limiting slider 571, a connecting plate 572, a limiting block 573, a second limiting slider 574, a spring 575, and a third limiting slider 576. The first limiting slider 571 has limiting blocks 573 integrally formed on both vertical outer walls. The limiting blocks 573 are arranged in pairs, and the first limiting slider 571 slides in engagement with the limiting groove 514. The horizontal sidewall of the connecting plate 572 is connected to the first limiting slider 571 via the spring 575. The connecting plate 572 has second limiting sliders 574 integrally formed at both vertical ends. The second limiting sliders 574 are arranged in pairs and abut against the outer wall of the slide rail 512, sliding in engagement with the slide rail 512. A cable support frame 55 is installed on the horizontal sidewall of the connecting plate 572, and the cable support frame 55 and the spring 575 are located on opposite sides. The third limiting slider 576 is installed on the horizontal side wall of the connecting plate 572. The plane where the third limiting slider 576 is located is perpendicular to the plane where the cable support frame 55 is located. The third limiting slider 576 is slidably connected to the third slide groove 563.

[0060] The first limiting slider 571 is connected to the connecting plate 572 by a spring 575, and its only permitted direction of movement is to slide along the axial direction of the slide rail housing 511.

[0061] The limiting block 573 is integrally formed with the first limiting slider 571 and is arranged in pairs. Its function is to form a sliding and limiting engagement with the limiting groove 514 on the slide rail housing 512. This engagement restricts the first limiting slider 571 to slide only axially, thereby establishing a stable axial motion reference for the compound motion of the second slider 57.

[0062] The connecting plate 572 connects the first limiting slider 571, the second limiting slider 574, the third limiting slider 576 and the cable support frame 55 into a whole, and bears and transmits forces from all directions to ensure that the components work together.

[0063] The second limiting slider 574 is arranged in pairs, with one end of its cross-section being a rounded rectangle. Under the restoring pressure of the spring 575, it is always tightly pressed against the outer wall of the slide rail 512. When the first limiting slider 571 is driven to move axially, the connecting plate 572 drives the second limiting slider 574 to slide along the outer wall of the slide rail 512. The inclined surface causes the second limiting slider 574 to generate a radial displacement, which in turn drives the cable support frame 55 to move radially.

[0064] Spring 575 is connected between the first limiting slider 571 and the connecting plate 572. It is in a free state in the initial position. When the limiting structure starts to work, spring 575 is in an elastic deformation state due to stretching. Its continuous restorative pressure presses the second limiting slider 574 against the inclined surface of the slide rail 512, eliminating any possible gaps.

[0065] The third limiting slider 576 forms a sliding and limiting engagement with the third groove 563 on the first slider 56. It serves two purposes: first, to transmit the axial driving force of the first slider 56 to the second slider 57; second, to restrict the degrees of freedom of the connecting plate 572 and the second limiting slider 574 relative to the first slider 56 in a specific direction, ensuring that they do not detach from the first slider 56 during movement.

[0066] The usage process of this utility model embodiment is as follows: After the operator issues a command through the control unit within the explosion-proof control box assembly 3, the explosion-proof motor 22 starts, and power is transmitted via the gearbox 21 and transmission device to the reel shaft 18, driving the cable reel assembly 1 to rotate. The cable is wound up under the guidance of the cable winding frame 17 on the surface of the hub 11. During this process, all electrical spark risks are contained: the explosion-proof enclosure 31 isolates potential internal explosions with its wide-gap labyrinth joint surface, while the double-sealed lip bearing at the shaft 18 and the sealed joint at the cable inlet form a sealing barrier, ensuring that external explosive dust cannot enter, thus achieving safe operation in hazardous environments.

[0067] When the cable is wound to the preset position, the system enters the limit switch phase after winding is complete. The control unit triggers the limit switch program, such as... Figures 10-12 The drive motor 52, embedded in the first spoke 12, is activated. The drive motor 52 drives the lead screw 53 to rotate, causing the first slider 56 to move axially. This axial power is redistributed through a motion conversion structure: the first limiting slider 571 of the second slider 57 is constrained by the limiting groove 514 of the slide rail housing 51 and slides axially; the second limiting slider 574, under the restoring pressure of the spring, moves against a specific wall surface of the slide rail 512, thus converting the axial drive into an oblique composite motion. Finally, the cable support frame 55, fixed to the second slider 57, extends from the inside of the first spoke 12 along this trajectory until its arc-shaped support surface completely abuts against the outermost cable. The pressure sensor feeds back a positioning signal, the drive motor 12 stops, and the cable is restrained, preventing loosening and scattering during subsequent movement or vibration.

[0068] The equipment also possesses continuous environmental adaptive adjustment capabilities. The control system monitors the environment in real time via temperature sensors, and the data is fed back to the PLC in the control box in real time. The PLC makes intelligent judgments based on preset algorithms. When the temperature rise may cause thermal expansion of the cable, it controls multiple cylinders 59 installed between the spokes to work synchronously and slightly, moving the movable second spoke by 2 to 3 millimeters to allow for cable expansion. Similarly, when the temperature drops, it maintains appropriate cable tension. This structure compensates for the thermal expansion and contraction of the cable caused by diurnal or seasonal temperature differences, avoids damage from excessive tension, and improves long-term operational reliability and cable lifespan.

[0069] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An explosion-proof cable reel suitable for dusty areas, characterized in that, include: The explosion-proof box assembly (3) is rotatably connected to the cable reel assembly (1), which passes through the box wall of the explosion-proof box assembly (3). The drive assembly (2) is connected to the cable reel assembly (1) in a transmission manner. The drive assembly (2) is disposed between the cable reel assembly (1) and the explosion-proof box assembly (3). The drive assembly (2) is electrically connected to the explosion-proof box assembly (3). A sealing component (4) is disposed in the connection gap between the cable reel assembly (1) and the explosion-proof box assembly (3) wall; A limiting component (5) is installed inside the cable reel assembly (1), and the limiting component (5) is electrically connected to the explosion-proof box assembly (3).

2. The explosion-proof cable reel suitable for dusty areas as described in claim 1, characterized in that, The cable reel assembly (1) includes: The hub (11) has a cable winding frame (17) installed on its arc-shaped outer wall. The hub (11) has a rotating shaft (18) installed on its outer wall in the axial direction. The hub (11) has a second sliding groove (15) on its arc-shaped outer wall. The second sliding groove (15) has several grooves. The first spoke (12) is fixedly connected at one end to the arc-shaped outer wall of the hub (11), and the other end of the first spoke (12) is fixedly connected to the rim (14). The second spoke (13) has a third slider (16) installed at one end, the third slider (16) is slidably connected in the second groove (15), and the other end of the second spoke (13) is fixedly connected to a rim (14). The cable winding frame (17) is disposed between the first spoke (12) and the second spoke (13).

3. The explosion-proof cable reel suitable for dusty areas as described in claim 1, characterized in that, The driving component (2) includes: The gearbox (21) is connected to the cable reel assembly (1) via a transmission at its output end; Explosion-proof motors (22) are installed in pairs on the side wall of the gearbox (21). The output end of the explosion-proof motors (22) is connected to the input end of the gearbox (21) via a coupling. The explosion-proof motor (22) is electrically connected to the explosion-proof box assembly (3).

4. The explosion-proof cable reel suitable for dusty areas as described in claim 1, characterized in that, The explosion-proof box assembly (3) includes: The explosion-proof enclosure (31) is connected to the top cover (34); Cable holes are provided on the side wall of the explosion-proof enclosure (31); A shaft hole (32) is formed on the side wall of the explosion-proof enclosure (31). A sealing assembly (4) is provided in the shaft hole (32). The cable reel assembly (1) passes through the sealing assembly (4) and is disposed in the shaft hole (32). Mounting plate, mounted on the explosion-proof enclosure (31), the mounting plate is equipped with a control unit, the control unit is electrically connected to the drive assembly (2), and the control unit is electrically connected to the limiting assembly (5); An observation window (33) is provided on the side wall of the explosion-proof enclosure (31).

5. The explosion-proof cable reel suitable for dusty areas as described in claim 4, characterized in that, The sealing assembly (4) includes: A sealing connector, threaded onto the cable hole; A sealing gasket is installed on the mating surface between the explosion-proof enclosure (31) and the enclosure cover (34); An outer sealing ring (41) is lip-shaped and is disposed in the shaft hole (32), with the lip of the outer sealing ring (41) facing the outside of the explosion-proof enclosure (31); The bearing (42) is disposed inside the outer sealing ring (41), and an inner sealing ring (43) is disposed inside the bearing (42). The inner sealing ring (43) is lip-shaped, and the lip of the inner sealing ring (43) faces the inside of the explosion-proof enclosure (31). The cable reel assembly (1) is inserted inside the inner sealing ring (43).

6. The explosion-proof cable reel suitable for dusty areas as described in claim 2, characterized in that, The limiting component (5) includes: The slide rail housing (51) is integrally formed with the first wheel spoke (12), and the slide rail housing (51) is provided with several; A drive motor (52) is installed inside the slide rail housing (51). The output end of the drive motor (52) is connected to a lead screw (53). The lead screw (53) is threadedly connected to a first slider (56). The first slider (56) is disposed inside the slide rail housing (51). The first slider (56) slides with the slide rail housing (51). The drive motor (52) is electrically connected to the explosion-proof box assembly (3). The second slider (57) is slidably engaged with the slide rail housing (51); A cable support frame (55) is installed on the outer wall of the second slider (57) facing the cable, and a pressure sensor is provided on the outer wall of the cable support frame (55) facing the cable direction; A cylinder (59) is installed between the first spoke (12) and the second spoke (13). The cylinder (59) is located inside the cable winding frame (17). Several cylinders (59) are provided.

7. The explosion-proof cable reel suitable for dusty areas as described in claim 6, characterized in that, The slide rail housing (51) includes: The slide rail housing body (511) is integrally formed with the first wheel spoke (12), and the drive motor (52) is mounted on the side wall of the slide rail housing body (511); A limiting plate (513) is installed on the side wall of the slide rail housing body (511), and the drive motor (52) is located inside the limiting plate (513); The slide rails (512) are arranged in pairs and installed on the side wall of the slide rail housing body (511). The slide rails (512) are located outside the lead screw (53). The limiting groove (514) passes through the upper and lower walls of the slide rail (512), and the limiting groove (514) is slidably connected to the second slider (57).

8. The explosion-proof cable reel suitable for dusty areas as described in claim 7, characterized in that, The first slider (56) includes: The first slider body (561) has a through threaded hole (562), which is threadedly connected to the lead screw (53); The third slide groove (563) is provided in pairs and is opened on the side wall of the first slider body (561). The third slide groove (563) is slidably connected to the second slider (57).

9. The explosion-proof cable reel suitable for dusty areas as described in claim 8, characterized in that, The second slider (57) includes: The first limiting slider (571) has two limit blocks (573) integrally formed on the outer walls of both sides in the vertical direction. The limit blocks (573) are arranged in pairs, and the first limiting slider (571) slides in cooperation with the limiting groove (514). The connecting plate (572) has its horizontal sidewall connected to the first limiting slider (571) via a spring (575). The connecting plate (572) has two vertical ends integrally formed with second limiting sliders (574). The second limiting sliders (574) are arranged in pairs and abut against the outer wall of the slide rail (512). The second limiting sliders (574) slide in cooperation with the slide rail (512). The cable support frame (55) is installed on the horizontal side wall of the connecting plate (572), and the cable support frame (55) and the spring (575) are arranged on opposite sides; The third limiting slider (576) is installed on the horizontal side wall of the connecting plate (572). The plane where the third limiting slider (576) is located is perpendicular to the plane where the cable support frame (55) is located. The third limiting slider (576) is slidably connected to the third slide groove (563).

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