Plugging device for cable hole of tower drum

Abstract

The embodiment of the utility model provides a plugging device for a cable hole of a tower drum. The plugging device comprises an annular top cover, an annular bottom plate and at least two elastic traction pieces, the annular top cover covers the outer side of the cable hole, and the side wall of the annular top cover is in contact with the surface of the tower drum; one end of each elastic traction piece is connected with the annular top cover, the other end of each elastic traction piece is connected with the annular bottom plate, and the elastic traction pieces are in a stretched state; the elastic traction pieces are uniformly arranged along the circumferential directions of the annular top cover and the annular bottom plate and are distributed along the axial direction of the cable hole; the annular bottom plate is located in the cable hole and moves in the axial direction of the cable hole through the elastic traction piece. The cable sequentially penetrates through the annular top cover and the annular bottom plate from outside to inside, the annular top cover, the inner side wall of the cable hole and the annular bottom plate jointly define a cavity, and the cavity is filled with the fireproof plug. According to the embodiment of the invention, through the structural combination of the annular top cover, the annular bottom plate and the elastic traction piece, tight plugging and fireproof protection of the cable hole are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to a plugging device for a tower cable hole. BACKGROUND

[0002] Wind turbine generators are usually installed in remote and complex environmental conditions, such as offshore or high mountains, where maintenance and rescue are difficult, so the fire safety of the equipment is required to be higher. As an important part of the wind turbine generator, the cable is responsible for transmitting power and signals, and its safety is directly related to the stable operation of the entire power generation system. However, since the cable usually passes through multiple components and structures of the unit, the cable hole becomes a potential fire hazard point. If these holes are not effectively plugged, once an electrical fault or short circuit occurs, the fire may spread rapidly, causing serious equipment damage or even complete failure of the unit.

[0003] Currently, for the plugging of the cable hole in the tower, the existing technology mainly uses fire-retardant fireproof mortar for filling. This material has the characteristics of high temperature resistance and flame retardance, which can effectively prevent the spread of flames and high-temperature gases through the cable hole. In specific applications, workers will fill fireproof mortar between the cable hole and the cable to ensure airtightness. However, due to changes in temperature and humidity, the fireproof mortar is prone to cracking, especially in offshore environments, where moisture and salt spray further accelerate the aging and shedding of the material. Secondly, due to the sway and vibration of the wind turbine tower during operation, relative movement may occur between the cable and the fireproof mortar, further causing the loosening and shedding of the plugging material.

[0004] Therefore, there is an urgent need for a plugging device for a tower cable hole to solve the problem of loosening and shedding of the plugging material. CONTENT OF THE INVENTION

[0005] The present application provides a plugging device for a tower cable hole to achieve the effect of tight plugging and fire protection of the cable hole.

[0006] The present application provides a plugging device for a tower cable hole, wherein the tower is provided with a cable hole, and fireproof plugging is filled in the cable hole, and the plugging device comprises an annular top cover, an annular bottom plate and at least two elastic pulling members.

[0007] The annular top cover is arranged on the outside of the cable hole, and the side wall of the annular top cover is in contact with the surface of the tower.

[0008] One end of each elastic pulling member is connected to the annular top cover, and the other end is connected to the annular bottom plate, and the elastic pulling member is in a stretched state.

[0009] The elastic pulling members are uniformly arranged along the circumferential direction of the annular top cover and the annular bottom plate and distributed along the axial direction of the cable hole.

[0010] The annular bottom plate is located in the cable hole and moves along the axial direction of the cable hole through the elastic pulling members.

[0011] The cable passes through the annular top cover and the annular bottom plate from outside to inside, and the annular top cover, the inner side wall of the cable hole and the annular bottom plate jointly enclose a cavity, and the fireproof blocking is filled in the cavity.

[0012] In a possible implementation, a plurality of through holes are uniformly distributed on the annular top cover.

[0013] One end of the elastic pulling member is connected to the annular bottom plate, the other end passes through the through hole and extends to the outside of the annular top cover, and is fixed on the outside of the annular cover plate through a fixing member.

[0014] In a possible implementation, the fixing member includes a limiting column and a limiting ring.

[0015] The limiting column is arranged on the outer side wall of the annular top cover and is distributed in the circumferential direction around the center of the annular top cover, and different limiting columns on the same radius straight line are different in distance from the center of the annular top cover.

[0016] The limiting ring is arranged at one end of the elastic pulling member, and the limiting ring is sleeved on the limiting column.

[0017] In a possible implementation, the fireproof blocking includes fireproof mud, and the fireproof mud is filled in the cavity enclosed by the annular top cover, the annular bottom plate and the inner side wall of the cable hole.

[0018] In a possible implementation, the fireproof blocking further includes fireproof cloth.

[0019] The fireproof cloth is wrapped on the outside of the fireproof mud.

[0020] The annular top cover, the fireproof cloth, the fireproof mud, the fireproof cloth and the annular bottom plate are sequentially stacked along the axial direction of the cable hole.

[0021] In a possible implementation, the fireproof cloth has a double-layer structure, the inner layer is a fiber material, and the outer layer is a fireproof coating.

[0022] In a possible implementation, the elastic pulling member has four, and the four elastic pulling members are uniformly distributed along the circumferential direction between the annular top cover and the annular bottom plate.

[0023] In a possible implementation, the elastic pulling member is a spring.

[0024] In a possible implementation, the annular top cover, the annular bottom plate and the elastic pulling member are all made of metal materials.

[0025] In a possible implementation, the annular top cover, the annular bottom plate and the elastic pulling member are all coated with an anticorrosive coating.

[0026] The plugging device provided by the embodiment of the application has good fireproof performance and structural stability, and provides comprehensive protection for the safe operation of the cables in the tower drum. Specifically, the cavity for filling the fireproof plugging material is formed by the enclosure of the annular top cover and the annular bottom plate, and the diffusion of fire and smoke is effectively isolated. The cable hole is ensured not to become a channel for the spread of fire when a fire occurs, and the overall fire safety of the equipment is improved. The multi-layer filling structure of the fireproof mortar and the fireproof cloth further enhances the fire retardant effect, and the plugging material can remain stable and provide long-term protection even in a high-temperature environment. The annular top cover and the annular bottom plate are tightly connected in the stretched state of the at least two elastic pulling members. The elastic pulling members are uniformly arranged in the circumferential direction, ensuring uniform distribution of force, so that the entire plugging structure remains stable in the case of vibration of the tower drum and displacement of the cables. No matter how great the external impact on the tower drum is during operation, the elastic pulling members can dynamically compensate for displacement through their elastic recovery performance, avoiding plugging failure due to looseness or gaps. Moreover, the elastic pulling members are always in a stretched state, ensuring the tight combination between the annular top cover and the annular bottom plate. This continuous tension keeps the plugging material in a stable and compact state, and it is not easy to relax and fall off due to temperature changes or material aging. It can be seen that the application not only improves the sealing and durability of the plugging, but also reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0028] Figure 1 A cross-sectional structure schematic diagram of the plugging device provided by the embodiment of the application;

[0029] Figure 2 A perspective structure schematic diagram of the plugging device provided by the embodiment of the application;

[0030] Figure 3 A front view structure schematic diagram of the plugging device provided by the embodiment of the application;

[0031] Figure 4 A top view structure schematic diagram of the annular top cover provided by the embodiment of the application;

[0032] Figure 5 The structure diagram of the fireproof plugging provided by the embodiment of the application is shown.

[0033] Explanation of reference signs:

[0034] 10-cable; 11-ring-shaped top cover; 12-ring-shaped bottom plate; 13-elastic pulling member; 14-fireproof plugging; 141-fireproof mortar; 142-fireproof cloth; 15-limiting column; 16-limiting ring.

[0035] The specific embodiments of the application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the application by any means, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] Firstly, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the application, and are not intended to limit the protection scope of the application. Those skilled in the art can make adjustments as needed in order to adapt to specific application occasions.

[0037] Secondly, it should be noted that, in the description of the application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the application can be understood according to the specific circumstances.

[0038] Then, it should be noted that, in the description of the application, the terms “upper”, “lower”, “front”, “rear”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the application.

[0039] In addition, the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include one or more features. In the description of the application, unless otherwise specified, the meaning of “multiple” is two or more.

[0040] In the prior art, the cable hole plugging in the wind turbine tower is usually carried out by using fire-retardant mortar as the main material. The fire-retardant mortar can form a physical barrier between the cable and the hole to prevent the spread of fire and high-temperature gas. The use of this material is relatively simple. During construction, the fire-retardant mortar is simply filled into the cable hole and ensured to be in close contact with the cable and the hole wall. Although this method can provide fire protection to some extent, its long-term stability and reliability are affected by environmental factors. For example, the fire-retardant mortar is prone to cracking and peeling under the influence of temperature and humidity changes, resulting in reduced sealing performance and affecting the fire protection effect. In addition, the traditional plugging method lacks dynamic adaptability and cannot effectively respond to the vibration and relative movement of the cable during the operation of the tower.

[0041] According to the above technical problems and needs, the scheme of the present application aims to provide a plugging device for a tower cable hole to cope with the complex operating environment in the wind turbine tower. The core of the embodiments of the present application is the dynamic tightening mechanism, which improves the adaptability, durability and protection effect of the plugging. First, by combining the annular top cover and the annular bottom plate, a stable structural support is formed outside and inside the hole. The annular top cover is arranged on the outside of the cable hole and is in close contact with the surface of the tower. The annular bottom plate is located inside the cable hole and can move along the axial direction of the hole. A closed cavity is provided for the filling of the plugging material, which helps to form a fireproof barrier. Second, one end of the elastic pulling member is connected to the annular top cover, the other end is connected to the annular bottom plate, and is stretched during installation. Through this continuous tension, the annular top cover and the annular bottom plate are tightly combined, and at the same time, the plugging material maintains its sealing performance during long-term operation. The elastic pulling member is evenly distributed along the circumference of the annular top cover and the annular bottom plate, ensuring uniform force transmission and avoiding loosening or displacement of the plugging caused by single-point stress. Its axial distribution allows the elastic pulling member to dynamically adapt to structural changes and operating vibrations inside the cable hole. Through the continuous tension of the elastic pulling member, the vibration and relative movement of the cable during the operation of the tower are effectively responded to, ensuring that the plugging material does not loosen in a vibrating environment. At the same time, the combination of the elastic pulling member with the top cover and the bottom plate allows the present application to adapt to cable holes of different sizes, improving the flexibility of plugging.

[0042] The application scenario of the present application is mainly aimed at fireproof plugging of cable holes in the tower drum of a wind turbine generator system, and is particularly suitable for offshore wind turbine generators and other industrial equipment that needs to operate for a long time in a complex environment. Offshore wind turbine generators operate in a harsh environment and often face problems such as high humidity, salt spray, wind impact, etc. The tower drum is exposed to a corrosive environment for a long time, and the plugging material of the internal cable holes is prone to looseness or aging due to changes in temperature and humidity and vibration. The plugging device in the present application is suitable for use in offshore wind farms, and is effectively resistant to corrosion of the marine environment through the arrangement of metal parts and corrosion-resistant coatings. The elastic pulling member maintains the tightness of the plugging material, and can remain stable and not prone to failure even under strong wind and wave-induced vibration. The plugging device is also suitable for use in industrial environments that need to cope with vibration and impact, such as wind turbine generators, oil drilling platforms or industrial manufacturing equipment. In these scenarios, vibration or relative displacement of the cable is inevitable during equipment operation, which can easily cause gaps between the plugging material and the hole wall, thereby weakening the fireproof effect. The plugging device provided in the embodiments of the present application provides continuous tension through the spring and other elastic pulling members, and evenly shares the stress through the uniform circumferential distribution design, effectively absorbing the impact force generated by vibration and preventing the plugging material from loosening or falling off.

[0043] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in combination with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar parts or parts having the same or similar functions throughout. The described embodiments are some of the embodiments of the present application, not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0044] As Figures 1 to 5As shown, the tower drum is provided with cable holes, and fireproof plugging is filled in the cable holes. The plugging device provided by the embodiment of the application is used for the cable holes in the tower drum, and is intended to ensure that the cable 10 remains in a safe state during the operation of the tower drum and prevent the spread of fire. The plugging device comprises a ring-shaped top cover 11, a ring-shaped bottom plate 12 and at least two elastic pullers 13. The ring-shaped top cover 11 serves as an external cover, which is arranged outside the cable hole. The side wall of the ring-shaped top cover 11 is in contact with the surface of the tower drum to achieve stable connection. For example, the ring-shaped top cover 11 is fixed to the outer surface of the tower drum by fasteners. The role of the ring-shaped top cover 11 is not only to provide a connection basis for the elastic puller 13, but also to limit the influence of the external environment on the internal plugging material by covering the cable hole, thereby reducing the invasion of dust, moisture and the like. One end of each elastic puller 13 is connected to the ring-shaped top cover 11, and the other end is connected to the ring-shaped bottom plate 12. The elastic puller 13 is in a stretched state. The elastic puller 13 is uniformly arranged along the circumferential direction of the ring-shaped top cover 11 and the ring-shaped bottom plate 12, ensuring uniform distribution of the pulling force and avoiding displacement or loosening of the plugging material inside the hole. The elastic puller 13 is distributed along the axial direction of the cable hole, so that the ring-shaped bottom plate 12 can move axially inside the hole, providing convenience for the installation, adjustment and maintenance of the fireproof plugging 14. Since the elastic puller 13 is always in a stretched state, even if the tower drum vibrates or the cable 10 moves relatively during operation, the plugging material can still remain tightly connected, reducing the problem of plugging failure caused by vibration.

[0045] The ring-shaped bottom plate 12 is located inside the cable hole and moves along the axial direction of the cable hole through the elastic puller 13. The cable 10 passes through the ring-shaped top cover 11 and the ring-shaped bottom plate 12 in turn from outside to inside. The ring-shaped top cover 11, the inner side wall of the cable hole and the ring-shaped bottom plate 12 jointly enclose a cavity, and the fireproof plugging 14 is filled in the cavity. The ring-shaped bottom plate 12 not only provides a stable fixing point for the elastic puller 13, but also forms a plugging space together with the ring-shaped top cover 11. The cavity is used to fill the fireproof plugging 14 material. That is, the fireproof plugging 14 material is filled in the cavity and is in close contact with the cable 10 and the inner wall of the hole, so as to ensure that the plugging material can effectively block the spread of fire when a fire occurs. Due to the continuous stretching action of the elastic puller 13, the plugging material can remain in a tight state even during long-term operation of the tower drum, reducing failure due to aging, relaxation or relative movement of the cable 10.

[0046] Through the above arrangement, the plugging device is matched by the annular top cover 11 and the annular bottom plate 12, and the tightness of the plugging material is maintained by the pulling force of the elastic pulling member 13, effectively preventing gaps from occurring in the cable hole. Secondly, the axial distribution and circumferential arrangement of the elastic pulling member 13 ensure the uniformity and stability of the plugging structure, allowing the plugging device to adapt to the tower vibration environment and prolong the service life. Further, the free mobility of the annular bottom plate 12 in the hole provides convenience for the installation and maintenance of the plugging material, improving the applicability and ease of operation of the device. Compared with the prior art, the application reduces the problems of material loosening, cracking and falling off commonly seen in traditional plugging methods, improves the stability and durability of the plugging structure. In the tower vibration environment, the sealing effect of the plugging material can still be maintained, and the gap between the cable 10 and the plugging material due to vibration is reduced.

[0047] In one embodiment, a plurality of through holes are uniformly distributed on the annular top cover 11. These through holes are uniformly distributed on the annular top cover 11, providing accurate positions for the arrangement of the elastic pulling member 13. The arrangement of the through holes not only considers the symmetry of the overall structure, but also ensures that each elastic pulling member 13 can connect the annular top cover 11 and the annular bottom plate 12 with uniform tension, avoiding the offset or loosening of the plugging structure due to uneven tension. One end of the elastic pulling member 13 is connected to the annular bottom plate 12, the other end passes through the through hole on the annular top cover 11 and extends to the outside of the annular top cover 11, and is fixed on the outside of the annular cover plate by a fixing member. Through such an arrangement, the elastic pulling member 13 not only applies a continuous tension between the annular bottom plate 12 and the annular top cover 11, but also realizes the linkage of the structure inside and outside the hole. Since one end of the elastic pulling member 13 extends to the outside of the annular top cover 11, the construction personnel can install, adjust and fix the elastic pulling member 13 externally, thereby simplifying the installation process and improving the construction efficiency. After the elastic pulling member 13 passes through the through hole, the end is fixed to the outside of the annular top cover 11 by the fixing member. The function of the fixing member is to ensure that the elastic pulling member 13 does not loosen in the stretched state, and to maintain a stable tension in the long-term use. In addition, the external fixation of the elastic pulling member 13 makes the installation and maintenance of the entire plugging device more convenient, and even in the case of limited space inside the cable hole, the installation and debugging of the elastic pulling member 13 can be easily completed.

[0048] Further, the fixing member includes a limiting column 15 and a limiting ring 16. The purpose of this combined structure is to ensure the stability of the tensile force of the elastic pulling member 13 after installation and to reduce the loosening or falling off of the elastic pulling member 13 during use. Specifically, the limiting ring 16 is arranged at one end of the elastic pulling member 13, and the limiting ring 16 is sleeved on the limiting column 15. The limiting ring 16 is arranged at one end of the elastic pulling member 13, and the inner diameter of the limiting ring 16 matches the outer diameter of the limiting column 15, so that the limiting ring 16 can be smoothly sleeved on the limiting column 15. The limiting column 15 is arranged on the outer sidewall of the annular top cover 11 and is distributed in a circumferential direction around the center of the annular top cover 11. Through this arrangement, the limiting column 15 forms a positioning network around the annular top cover 11, so that each elastic pulling member 13 can be stably supported, and the mechanical balance of the device as a whole is ensured. On the outer sidewall of the annular top cover 11, a plurality of limiting columns 15 are arranged on the same radius straight line, and the limiting columns 15 on the same radius straight line are different from each other in distance from the center of the annular top cover 11. Such an arrangement provides high flexibility, so that the installation position of the elastic pulling member 13 can be adjusted according to requirements. By adjusting the matching position of the limiting ring 16 and the limiting column 15, the stretching angle and length of the elastic pulling member 13 can be changed, so as to adapt to different sizes of cable holes and arrangement modes of the cable 10. The flexible arrangement of the limiting column 15 can also effectively buffer the influence caused by tower vibration or relative movement of the cable 10 during equipment operation, so as to avoid structural deformation or failure of the elastic pulling member 13 due to uneven stress.

[0049] When the elastic pulling member 13 is installed, the end thereof is fixed on the limiting column 15 through the limiting ring 16, and the cooperation between the limiting ring 16 and the limiting column 15 not only provides stable support, but also enables the installation position and tensile force of the elastic pulling member 13 to be flexibly adjusted according to specific installation requirements. This arrangement simplifies the installation and maintenance process of the elastic pulling member 13, and makes the installation operation of the entire device more convenient and efficient. The combination of the limiting ring 16 and the limiting column 15 also has anti-vibration performance. When the tower is subjected to vibration caused by wind or equipment operation during the operation of the tower, the cooperation between the limiting ring 16 and the limiting column 15 can effectively absorb and disperse the impact force caused by vibration, reducing the loosening or displacement of the elastic pulling member 13. In summary, through the combined arrangement of the limiting ring 16 and the limiting column 15, the end of the elastic pulling member 13 is fixed and the stretching state can be flexibly adjusted. Compared with the traditional fixing method, the embodiment of the present application provides higher flexibility and reliability, so that the device can operate stably for a long time even in complex environments such as offshore wind power. In addition, the combined structure of the limiting ring 16 and the limiting column 15 reduces the dependence on installation tools, and the installation and adjustment of the elastic pulling member 13 can be quickly completed by the construction personnel, improving the construction efficiency and reducing the maintenance cost.

[0050] In one specific embodiment, the fireproof seal 14 includes fireproof mortar 141 as a sealing material, which has good high-temperature resistance and fire resistance. When the cable 10 is accidentally overheated or short-circuited to cause a fire, the fireproof mortar 141 can effectively isolate the flame and high temperature, preventing the fire from spreading to other areas through the hole. At the same time, the high-density characteristics of the fireproof mortar 141 enable it to close the air flow in the hole when a fire occurs, slowing down the supply of oxygen and further suppressing the burning and spreading of the flame. The fireproof mortar 141 is filled in the cavity enclosed by the annular top cover 11, the annular bottom plate 12 and the inner side wall of the cable hole. The filling process of the fireproof mortar 141 aims to ensure that the inside of the cable hole is completely isolated from the external environment, forming a layer of sealing structure with fire resistance and heat insulation characteristics. In specific applications, the fireproof mortar 141 is uniformly filled in the cavity between the annular top cover 11 and the annular bottom plate 12, and is in close contact with the inner side wall of the cable hole. When filling, the construction personnel need to ensure that there are no bubbles, gaps or uneven areas in the fireproof mortar 141 to prevent affecting the sealing effect. Through the fastening action of the annular top cover 11 and the annular bottom plate 12, the fireproof mortar 141 is always in a compressed state, ensuring that it will not loosen or fall off under the condition of equipment vibration or environmental change. In addition, the continuous pulling force of the elastic pulling member 13 further consolidates the sealing performance of the fireproof mortar 141, ensuring that the material is tightly attached to the inner wall of the hole and the surface of the cable 10.

[0051] Further, the fireproof seal 14 also includes fireproof cloth 142, which is wrapped on the outside of the fireproof mortar 141, forming an additional protective barrier. The tight wrapping of the fireproof cloth 142 can prevent the displacement or falling off of the fireproof mortar 141 in the hole, ensuring that the fireproof seal 14 always maintains its sealed state. In addition, the fireproof cloth 142 can absorb a certain impact force, helping to alleviate the impact of tower vibration on the fireproof mortar 141, further improving the stability of the sealing device in the operating environment. The setting of this multi-layer structure can enhance the overall performance of the fireproof seal 14, not only improving the fire resistance and structural stability of the seal, but also prolonging the service life of the sealing material. In a specific structure, the annular top cover 11, the fireproof cloth 142, the fireproof mortar 141, the fireproof cloth 142 and the annular bottom plate 12 are sequentially stacked along the axial direction of the cable hole. The layers are tightly attached to each other to ensure the integrity and reliability of the seal. For example, during installation, the annular top cover 11 is located on the outside of the cable hole, and the first layer of fireproof cloth 142, the fireproof mortar 141 and the second layer of fireproof cloth 142 are sequentially arranged below it, and the annular bottom plate 12 is used as support. Construction personnel only need to arrange each layer of material in sequence and tighten and fix it through the elastic pulling member 13 to complete the efficient installation. In addition, the fireproof cloth 142 not only forms a complete sealing structure with other components in the axial direction, but also adheres to the inner wall of the hole, further improving the sealing effect of the seal.

[0052] Specifically, the fireproof cloth 142 has a double-layer structure, with the inner layer being a fiber material. The fiber material has high heat resistance and can maintain structural stability without deformation or melting in a high-temperature environment. The high-temperature-resistant fiber material can also quickly form a heat insulation barrier at the initial stage of a fire to prevent heat conduction to the cable 10 and other equipment. In addition, the inner layer fiber material also has good flexibility, allowing it to closely adhere to the surface of the fireproof mortar 141 and adapt to the slight displacement between the cable 10 and the sealing material during the operation of the tower, reducing cracks and looseness caused by vibration or structural movement. The outer layer is a fireproof coating. The fireproof coating provides additional fire-retardant protection and environmental protection for the fireproof cloth 142. The fireproof coating has good corrosion resistance and can resist the erosion of water vapor and corrosive substances in a humid and high-salinity environment. This feature makes the sealing device suitable for use in offshore wind turbine generators and other environments. In addition, the fireproof coating forms a dense carbonized protective layer when a fire occurs, effectively preventing the spread of flames and slowing down the development of the fire. Therefore, the double-layer structure not only enhances the heat resistance and fire resistance of the fireproof cloth 142, but also provides good mechanical strength and environmental adaptability.

[0053] In one specific embodiment, there are four elastic pullers 13, and the four elastic pullers 13 are evenly distributed along the circumference between the annular top cover 11 and the annular bottom plate 12. The four elastic pullers 13 are respectively connected from the lower surface of the annular top cover 11 to the upper surface of the annular bottom plate 12, and the elastic pullers 13 in the stretched state form a continuous tension in the axial direction perpendicular to the cable hole. This uniform tension ensures that the fireproof sealing material 14 always closely adheres to the inner wall of the cable hole, and even in the case of vibration of the wind turbine tower or relative displacement of the cable 10, the sealing material will not relax, fall off, or form gaps. The circumferential arrangement of the four elastic pullers 13 not only ensures the symmetry of the sealing device, but also improves the anti-vibration performance of the sealing device. During the operation of the tower, frequent vibrations and impact forces may occur due to external wind or the operation of mechanical equipment. The elastic pullers 13, through their uniform distribution, effectively absorb and disperse the stress caused by these vibrations, preventing the sealing structure from failing due to excessive stress at a single point.

[0054] In addition, the uniform distribution of the four elastic pullers 13 also provides convenience for installation and maintenance by construction personnel. During installation, the position of each elastic puller 13 is pre-set, and the construction personnel only need to install the elastic pullers 13 one by one between the annular top cover 11 and the annular bottom plate 12 according to the layout diagram to complete the construction of the entire sealing device. Since the four elastic pullers 13 jointly bear the tension of the sealing material, the stress load of each puller is reduced, thereby reducing the wear of the elastic pullers 13 and prolonging the service life of the device.

[0055] Specifically, the elastic pull member 13 is a spring. The spring has excellent tensile properties and reset capabilities, can apply continuous and uniform tension, and maintain a stable tensile state during long-term use. The spring can not only adapt to the vibration of the tower during operation and the relative movement of the cable 10, but also maintain a tight fit of the sealing material when subjected to external forces or temperature changes, thereby preventing sealing failure. During installation, the spring is pre-stretched to an appropriate length so that it forms a continuous tension between the annular top cover 11 and the annular bottom plate 12. Regardless of the vibration of the tower or the displacement of the cable 10 during operation, the spring can adjust the tension in time through its elastic compensation effect to ensure overall stability and sealing. In addition, the spring's reset ability allows it to quickly return to its original state after being subjected to a transient impact force, ensuring that the overall stability is not affected by short-term impacts. Compared with other types of elastic parts, such as rubber belts or tension ropes, the spring structure is less prone to aging during long-term use and has higher durability.

[0056] In one specific embodiment, the annular top cover 11, annular base plate 12, and elastic puller 13 are all made of metal. Metal is chosen for its excellent mechanical strength, durability, and environmental adaptability, ensuring the long-term stability and reliability of the device in harsh environments. Metal can not only withstand the vibration and impact forces generated during tower operation, but also provide sufficient structural support to prevent deformation or failure of the plugging device due to long-term use. The annular top cover 11, as the upper covering structure of the plugging device, needs to be in close contact with the outer surface of the tower and is secured to the outside of the tower via fasteners. Its metal structure provides stable support and a reliable foundation for the connection of the elastic puller 13. The annular base plate 12 is located inside the cable hole and, through its connection to the elastic puller 13, enables axial movement. The base plate's metal structure not only ensures its stability within the hole but also resists corrosion from environmental factors such as moisture, salt, and vibration. The elastic puller 13 is a metal spring, which not only has excellent elasticity and tensile strength, but can also maintain tension for a long time when stretched.

[0057] To further enhance the overall corrosion resistance, the annular top cover 11, the annular bottom plate 12 and the elastic pulling piece 13 are coated with a corrosion-resistant coating on the surface. The corrosion-resistant coating provides additional protection for these metal components, preventing them from rusting or oxidizing in a humid, salt spray, and other corrosive environments during long-term use. This coating is particularly suitable for high-humidity, high-salt environments such as offshore wind turbines, effectively extending the service life of the sealing device. The role of the corrosion-resistant coating is not only to protect the metal surface, but also to reduce the accumulation of dust and impurities through its smooth properties, reducing maintenance requirements. By using metal materials and coating with corrosion-resistant coating, the sealing device also reduces material aging and loss, reducing maintenance costs. The strength of the metal structure and the double protection of the corrosion-resistant coating enable the device to operate stably in high-humidity, high-salt, and high-vibration environments for a long time. It should be noted that the specific corrosion-resistant coating can be selected flexibly according to the current environment, and is not specifically limited here.

[0058] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenient differentiation and do not limit the scope of the embodiments of the present application.

[0060] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A plugging device for a tower cable hole, characterized in that The tower drum is provided with a cable hole, and a fireproof blocking filler is filled in the cable hole, the blocking device comprising an annular top cover, an annular bottom plate and at least two elastic pullers; The annular top cover is arranged outside the cable hole, and the side wall of the annular top cover is arranged in contact with the surface of the tower drum; One end of each of the elastic pullers is connected with the annular top cover, and the other end is connected with the annular bottom plate, and the elastic puller is in a stretched state; The elastic pullers are uniformly arranged along the circumference of the annular top cover and the annular bottom plate and distributed along the axial direction of the cable hole; The annular bottom plate is located in the cable hole and moves along the axial direction of the cable hole through the elastic puller; The cable passes through the annular top cover and the annular bottom plate from outside to inside, and the annular top cover, the inner side wall of the cable hole and the annular bottom plate jointly enclose a cavity, and the fireproof blocking filler is filled in the cavity.

2. The occlusion device of claim 1, wherein, The annular top cover is uniformly distributed with a plurality of through holes; One end of the elastic puller is connected with the annular bottom plate, and the other end passes through the through hole and extends to the outside of the annular top cover, and is fixed on the outside of the annular cover plate through a fixing piece.

3. The occlusion device of claim 2, wherein, The fixing piece comprises a limiting column and a limiting ring; The limiting column is arranged on the outer side wall of the annular top cover and is distributed in the circumferential direction around the center of the annular top cover, and different limiting columns on the same radius straight line are different in distance from the center of the annular top cover; The limiting ring is arranged at one end of the elastic puller, and the limiting ring is sleeved on the limiting column.

4. The occlusion device of claim 1, wherein, The fireproof blocking comprises fireproof mud, and the fireproof mud is filled in the cavity enclosed by the annular top cover, the annular bottom plate and the inner side wall of the cable hole.

5. The occlusion device of claim 4, wherein, The fireproof blocking also comprises fireproof cloth; The fireproof cloth is wrapped on the outside of the fireproof mud; The annular top cover, the fireproof cloth, the fireproof mud, the fireproof cloth and the annular bottom plate are sequentially stacked along the axial direction of the cable hole.

6. The occlusion device of claim 5, wherein, The fireproof cloth has a double-layer structure, the inner layer is a fiber material, and the outer layer is a fireproof coating.

7. The occlusive device of claim 1, wherein, The elastic puller has four, and the four elastic pullers are uniformly distributed along the circumference between the annular top cover and the annular bottom plate.

8. The occlusion device according to claim 1 or 7, characterized in that The elastic puller is a spring.

9. The occlusion device of any of claims 1-6, wherein, The annular top cover, the annular bottom plate and the elastic puller are all made of metal material.

10. The occlusive device of any of claims 1-6, wherein, The annular top cover, the annular bottom plate and the elastic puller are all coated with an anticorrosive coating.

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