A box-type substation housing sealing device

Abstract

This application discloses a sealing device for the enclosure of a prefabricated substation, relating to the field of power equipment technology. It includes a first clamping member, a second clamping member, and an elastic sealing member. Both the first and second clamping members are disposed on the enclosure of the prefabricated substation. The first clamping member has a first receiving groove, and the second clamping member has a second receiving groove corresponding to the first receiving groove. The first and second receiving grooves enclose a receiving cavity. The elastic sealing member is disposed within the receiving cavity, and its outer diameter is larger than the inner diameter of the receiving cavity. The elastic sealing member has a wire-passing hole that communicates with the inside and outside of the prefabricated substation enclosure. The first and second clamping members are connected by an adjusting structure, which drives both the first and second clamping members to move towards the elastic sealing member. This solution can prevent sand, salt spray, and water vapor from intruding into the interior of the prefabricated substation and effectively prevent small organisms from entering.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to a sealing device for the enclosure of a prefabricated substation. Background Technology

[0002] Wind power, photovoltaic and other new energy power generation facilities are deployed in large numbers in areas with harsh environmental conditions such as deserts, Gobi, coastal mudflats and plateaus. As a key node for power conversion and distribution, box-type substations are directly exposed to harsh environments such as strong winds and sandstorms, high concentrations of salt spray, seasonal floods and large temperature differences between day and night. Their long-term safe and stable operation faces severe challenges.

[0003] Currently, the sealing solutions used in conventional prefabricated substations are insufficient in their protective capabilities, especially the sealing devices for the bottom cable penetration holes, which have significant defects. Existing solutions often use simple sealing blocks or sealing rings. After multiple cables are laid, it is difficult to achieve a tight, gapless fit between the cables and the sealing material, and between the sealing material and the wall of the enclosure, leaving physical gaps. This allows sand, moisture, and salt spray to continuously penetrate the interior of the prefabricated substation over a long period. Furthermore, the unsealed gaps provide a pathway for small organisms (such as rodents, reptiles, and insects) to enter the enclosure. Once these organisms come into contact with live parts, they can easily cause grounding short circuits and power outages in the electrical equipment, posing a dual threat to both equipment safety and ecological protection. Summary of the Invention

[0004] The purpose of this application is to provide a sealing device for the enclosure of a prefabricated substation, which aims to solve the technical problem of poor sealing of cable passage holes in prefabricated substations in the prior art.

[0005] To achieve the above objectives, this application provides a sealing device for a prefabricated substation enclosure, comprising a first clamping member, a second clamping member, and an elastic sealing member. Both the first and second clamping members are disposed on the enclosure of the prefabricated substation. The first clamping member has a first receiving groove, and the second clamping member has a second receiving groove corresponding to the first receiving groove. The first and second receiving grooves enclose a receiving cavity. The elastic sealing member is disposed within the receiving cavity, and its outer diameter is larger than the inner diameter of the receiving cavity. The elastic sealing member has a wire-passing hole that communicates with the inside and outside of the prefabricated substation enclosure. The first and second clamping members are connected by an adjustment structure, which drives both the first and second clamping members to move towards the elastic sealing member, so that the outer wall of the elastic sealing member fits against the inner wall of the receiving cavity, and the inner wall of the wire-passing hole fits against the outer wall of the cable sheath.

[0006] In one embodiment, the adjustment structure is a bolted connection structure, which includes at least one fastening bolt. The first clamping member and the second clamping member are respectively provided with mounting holes. The fastening bolt passes through the mounting holes. Tightening the fastening bolt can drive the first clamping member and the second clamping member to move toward the elastic seal.

[0007] In one embodiment, all mounting holes are open holes, and the bolt connection structure further includes a nut adapted to the fastening bolt. The screw end of the fastening bolt passes through the open holes of the first clamping member and the second clamping member in sequence and is threadedly engaged with the nut. The nut end of the fastening bolt abuts against the side of the first clamping member away from the second clamping member, and the nut abuts against the side of the second clamping member away from the first clamping member.

[0008] In one embodiment, the mounting hole includes a light hole in the first clamping member and a threaded hole in the second clamping member. The screw end of the fastening bolt passes through the light hole and is threaded into the threaded hole. The nut end of the fastening bolt abuts against the side of the first clamping member away from the second clamping member.

[0009] In one embodiment, the elastic seal is an integral annular structure, and the through hole is provided through the elastic seal along its axial direction.

[0010] In one embodiment, the elastic seal is a split structure, comprising two symmetrically arranged semi-annular sealing bodies, which together form the through hole.

[0011] In one embodiment, the outer wall of the elastic seal is a cylindrical surface adapted to the inner wall of the receiving cavity, and the inner wall of the elastic seal is a cylindrical surface adapted to the outer sheath of the cable.

[0012] In one embodiment, the resilient seal is made of weather-resistant rubber.

[0013] In one embodiment, the sealing device further includes a clamping member and a fastening screw. The clamping member is disposed at the end of the elastic seal, and the fastening screw is threadedly connected to the clamping member and the elastic seal, respectively. Tightening the fastening screw can cause the clamping member to compress the elastic seal along the axial direction of the elastic seal, so that the elastic seal expands radially along the elastic seal.

[0014] In one embodiment, there are two clamping members, namely a first clamping member and a second clamping member. The first clamping member and the second clamping member are respectively disposed at both ends of the elastic seal. The fastening screw passes through the first clamping member, the elastic seal, and the second clamping member in sequence. The fastening screw is threadedly connected to the first clamping member, the elastic seal, and the second clamping member. Tightening the fastening screw can cause the first clamping member and the second clamping member to compress the elastic seal from both ends of the elastic seal along the axial direction of the elastic seal, so that the elastic seal expands radially along the elastic seal.

[0015] The above-mentioned technical solution of this application has at least the following beneficial technical effects: The technical solution of this application uses the adjustable cooperation of the first clamping member and the second clamping member to compress the elastic sealing member with an outer diameter larger than the receiving cavity, so that the outer wall of the elastic sealing member is tightly fitted with the inner wall of the receiving cavity, and the inner wall of the wire hole is tightly fitted with the outer sheath of the cable. This can not only prevent sand, salt spray, water vapor and other substances from entering the interior of the box-type substation, but also effectively prevent small organisms from entering the interior of the box-type substation, thereby improving the sealing effect of the wire hole of the box-type substation. This is beneficial to ensuring the operating environment of the electrical components inside the box-type substation, extending the service life of the equipment, and reducing the operation and maintenance costs and power outage risks in harsh environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the cable installation in an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 2 This is a schematic diagram of the overall structure of an embodiment of the box-type substation enclosure sealing device provided in this application, without the installation of cables; Figure 3 This is a schematic diagram of the assembly structure of the first clamping member and the second clamping member in an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 4 This is a schematic diagram of the structure of the first clamping member of an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 5 This is a schematic diagram of the structure of the second clamping member in an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 6 This is a first-view structural schematic diagram of the cooperation between the elastic sealing element and the clamping element in an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 7 This is a second-view structural schematic diagram of the cooperation between the elastic sealing element and the clamping element in an embodiment of the box-type substation enclosure sealing device provided in this application; Figure 8This is a structural schematic diagram of the cabinet door seal of the prefabricated substation provided in this application; Figure 9 yes Figure 8 Sectional view at point AA; Figure 10 This is a schematic diagram of the outer shell structure of the prefabricated substation provided in this application.

[0017] Figure label: 100. Sealing device; 1. First clamping element; 11. First receiving groove; 2. Second clamping element; 21. Second receiving groove; 3. Elastic sealing element; 31. Wire hole; 4. Receiving cavity; 5. Adjustment structure; 6. Cable outer sheath; 7. Pressing element; 71. First pressing element; 72. Second pressing element; 8. Fastening screw; 200. Cabinet door sealing element; 201. Door panel; 202. First sealing strip; 203. Second sealing strip. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0019] The embodiments described in this application are only some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application. In the description of this application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Wind power, photovoltaic, and other new energy power generation facilities are widely deployed in harsh environments such as deserts, Gobi, coastal mudflats, and plateaus. As a critical node for power conversion and distribution, prefabricated substations are directly exposed to severe environments such as strong winds and sandstorms, high concentrations of salt spray, seasonal floods, and large diurnal temperature variations, posing a serious challenge to their long-term safe and stable operation. Currently, the sealing solutions used in conventional prefabricated substations are insufficient, especially the sealing devices for the bottom cable penetration holes, which have significant defects. Existing solutions often use simple sealing blocks or sealing rings. After multiple cables are laid, it is difficult to achieve a tight, seamless fit between the cables and the sealing material, and between the sealing material and the wall of the enclosure, leaving physical gaps. These gaps become channels for sand, water vapor, and salt spray to continuously penetrate the interior of the prefabricated substation. Furthermore, unsealed pores provide entry points for small organisms (such as rodents, reptiles, and insects). Once these organisms come into contact with live parts, they can easily cause grounding short circuits and power outages, posing a dual threat to equipment safety and ecological protection.

[0021] To address the aforementioned technical problems, this application provides a sealing device for the enclosure of a prefabricated substation. In one embodiment, please refer to... Figures 1 to 7 The sealing device for the enclosure of the prefabricated substation includes a first clamping member 1, a second clamping member 2, and an elastic sealing member 3. Both the first clamping member 1 and the second clamping member 2 are disposed within the enclosure of the prefabricated substation. The first clamping member 1 has a first receiving groove 11, and the second clamping member 2 has a second receiving groove 21 corresponding to the first receiving groove 11. The first receiving groove 11 and the second receiving groove 21 enclose a receiving cavity 4. The elastic sealing member 3 is disposed within the receiving cavity 4. The elastic sealing member 3 can be made of weather-resistant rubber, silicone rubber, or neoprene rubber. The elastic sealing member 3 can be an integral structure or a split structure. The outer diameter of the elastic sealing member 3 is larger than the inner diameter of the receiving cavity 4. The elastic sealing member 3 has a wire-passing hole 31, which communicates with the inside and outside of the enclosure of the prefabricated substation. The first clamping member 1 and the second clamping member 2 are connected by an adjusting structure 5. The adjusting structure 5 can be a snap-fit ​​hook connection structure, a screw-slider structure, or a bolt connection structure. Specifically, since the outer diameter of the elastic seal 3 is larger than the inner diameter of the receiving cavity 4, when the adjusting structure 5 drives the first clamping member 1 and the second clamping member 2 to move toward the elastic seal 3, it will squeeze the elastic seal 3 to deform along its own radial direction, so that the outer wall of the elastic seal 3 is tightly fitted with the inner wall of the receiving cavity 4, and the inner wall of the wire hole 31 is tightly fitted with the outer wall of the cable outer sheath 6.

[0022] The technical solution of this application uses the adjustable cooperation of the first clamping member 1 and the second clamping member 2 to compress the elastic sealing member 3, whose outer diameter is larger than that of the receiving cavity 4, so that the outer wall of the elastic sealing member 3 is tightly fitted with the inner wall of the receiving cavity 4, and the inner wall of the wire hole 31 is tightly fitted with the outer sheath of the cable 6. This can prevent sand, salt spray, water vapor and other substances from entering the interior of the box-type substation, and can also effectively prevent small organisms from entering the interior of the box-type substation, thereby improving the sealing effect of the wire hole 31 of the box-type substation. This is beneficial to ensuring the operating environment of the electrical components inside the box-type substation, extending the service life of the equipment, and reducing the operation and maintenance costs and power outage risks in harsh environments.

[0023] In one implementation, please refer to Figures 1 to 3 The adjusting structure 5 is a bolted connection structure, which includes at least one fastening bolt. The first clamping member 1 and the second clamping member 2 have corresponding mounting holes, through which the fastening bolt passes. Tightening the fastening bolt drives both the first clamping member 1 and the second clamping member 2 towards the elastic sealing member 3. Specifically, by tightening the fastening bolt, the first clamping member 1 and the second clamping member 2 can be moved closer or further apart. When they are close together, the elastic sealing member 3 can be compressed to achieve a seal; when they are far apart, the elastic sealing member 3 can be installed or removed. This embodiment, by using a bolted connection structure to achieve adjustment and locking of the clamping members, provides a stable and adjustable clamping force, ensuring a long-lasting and reliable sealing effect, while also being easy to disassemble and maintain at a low cost.

[0024] In one embodiment, all mounting holes are open holes, and the bolt connection structure also includes a nut adapted to the fastening bolt. The threaded end of the fastening bolt passes through the open holes of the first clamping member 1 and the second clamping member 2 in sequence and engages with the nut threadedly. The nut end of the fastening bolt abuts against the side of the first clamping member 1 opposite to the second clamping member 2, and the nut abuts against the side of the second clamping member 2 opposite to the first clamping member 1. This embodiment, through the bidirectional abutment engagement of the fastening bolt and nut on both sides of the clamping member, makes the compressive force distribution more uniform and stable, avoids deformation of the clamping member under stress, and makes disassembly and adjustment more flexible and convenient. It is beneficial to improve the overall structural strength and long-term locking reliability of the sealing device, and adapts to the long-term sealing requirements in harsh environments.

[0025] In one embodiment, the mounting hole includes a clear hole in the first clamping member 1 and a threaded hole in the second clamping member 2. The screw end of the fastening bolt passes through the clear hole and engages with the threaded hole, while the nut end of the fastening bolt abuts against the side of the first clamping member 1 opposite to the second clamping member 2. This embodiment eliminates the need for an external nut and reduces the number of parts by directly engaging the fastening bolt with the threaded hole on the second clamping member 2. This simplifies the assembly process and facilitates rapid on-site installation and debugging. It also makes the locking structure more compact, improving the overall integration and ease of operation of the device, and ensuring efficient and reliable sealing adjustment.

[0026] In one embodiment, the elastic seal 3 is an integral annular structure, with the threaded hole 31 extending through the elastic seal 3 along its axial direction. This embodiment, by employing an integral annular elastic seal 3, enhances the overall sealing continuity and eliminates seams, further improving the sealing effect. It effectively prevents sand, salt spray, and moisture from seeping in through the joints, while also simplifying installation and positioning, reducing the risk of misalignment. This improves the integrity and reliability of the seal at the threaded section, reduces assembly difficulty, and ensures a long-term sealing effect.

[0027] In one embodiment, the elastic seal 3 is a split structure, comprising two symmetrically arranged semi-annular sealing bodies that enclose a wire-passing hole 31. This embodiment, by employing a split elastic seal 3 composed of two symmetrical semi-annular sealing bodies, allows for on-site assembly after cable laying, achieving sealing without pre-threading, significantly reducing construction difficulty and installation limitations. It also facilitates later maintenance and replacement, improving the flexibility and ease of maintenance of the transformer substation's wire-passing sealing construction.

[0028] In one embodiment, the outer wall of the elastic seal 3 is a cylindrical surface adapted to the inner wall of the receiving cavity 4, and the inner wall of the elastic seal 3 is a cylindrical surface adapted to the cable outer sheath 6. This embodiment, by setting both the inner and outer walls of the elastic seal 3 as adapted cylindrical surfaces, makes the seal more evenly and tightly fitted with the receiving cavity 4 and the cable outer sheath 6, eliminating local gaps and stress concentration, effectively improving sealing integrity and impermeability, and enhancing the barrier effect against sand, salt spray, and water vapor, ensuring long-term stable operation of the sealing device.

[0029] In one embodiment, the elastic seal 3 is made of weather-resistant rubber. By using weather-resistant rubber to make the elastic seal 3, this embodiment gives it good anti-aging, anti-salt spray, and anti-high and low temperature properties. It is not easy to crack and fail in harsh outdoor environments, and can maintain good elasticity and sealing fit for a long time, which is beneficial to improving the service life of the sealing device and the long-term sealing reliability.

[0030] In one implementation, please refer to Figure 6 and Figure 7The sealing device also includes a clamping element 7 and a fastening screw 8. The clamping element 7 is located at the end of the elastic seal 3. The fastening screw 8 is threadedly connected to the clamping element 7 and the elastic seal 3 respectively. Tightening the fastening screw 8 can cause the clamping element 7 to compress the elastic seal 3 along the axial direction of the elastic seal 3, so that the elastic seal 3 expands along the radial direction of the elastic seal 3. This can further improve the tightness of the seal between the seal and the receiving cavity 4 and the cable outer sheath 6, enhance the clamping force and sealing effect of the sealing interface, effectively resist high-pressure wind and sand, salt spray and water vapor penetration, and help improve the sealing reliability and adaptability of the sealing device in harsh environments.

[0031] In one implementation, please refer to Figure 7 The device employs two clamping components 7, designated as a first clamping component 71 and a second clamping component 72. These components are positioned at both ends of the elastic seal 3. A fastening screw 8 passes sequentially through the first clamping component 71, the elastic seal 3, and the second clamping component 72, and is threadedly connected to each component. Tightening the screw 8 compresses the elastic seal 3 axially from both ends, causing it to expand radially. This embodiment, through the cooperation of the clamping components 7 and the fastening screw 8, applies synchronous axial pressure to both ends of the elastic seal 3, resulting in uniform radial expansion. This ensures a tighter and more balanced fit between the seal and the cable and cavity, preventing uneven deformation and sealing gaps caused by unilateral clamping. It further enhances the sealing ability against sand, salt spray, and moisture, and improves the stability and long-term sealing effect of the sealing device.

[0032] Furthermore, traditional prefabricated substations typically rely solely on a single-layer sealing strip or metal sealing plate for pressure sealing between the cabinet door and frame when closed. While this structure offers some protection against macroscopic splashing water, it is ineffective against the intrusion of sand and dust accompanied by strong wind pressure, and it cannot prevent the slow penetration of highly penetrating salt spray and humid air, resulting in insufficient long-term reliability and integrity of the seal. To address this issue, this application also provides a cabinet door seal 200 for prefabricated substations; please refer to [link / reference]. Figure 8 and Figure 9The cabinet door seal 200 includes a first sealing strip 202 and a second sealing strip 203. Specifically, the first sealing strip 202 has a "J"-shaped cross-section and is installed on the upper side and left and right sides of the cabinet door. Its main body is fixed to the side of the door panel 91, with the long side extending outward and fitting against the outer side of the door panel 91 to form an external waterproof lip. The short side is pressed against the door frame when the cabinet door is closed. The second sealing strip 203 has a "C"-shaped cross-section and is installed on the lower side of the cabinet door. Its main body is fixed to the inner bottom of the door panel 91, and the groove is used to fit into the bottom threshold of the cabinet. When the cabinet door is closed, the door frame squeezes the short side of the first sealing strip 202, causing it to deform elastically and fill the vertical gap between the door panel 91 and the door frame. The bottom threshold of the cabinet is embedded in the groove of the second sealing strip 203, and the seal is achieved by the elastic compression of the lips on both sides of the groove. At the same time, the external waterproof eaves of the first sealing strip 202 cover the horizontal gap between the upper edge of the door panel 91 and the crossbeam, forming a double protection with the elastic compression seal of each sealing strip, thus creating a continuous and highly elastic sealing contact surface and improving the sealing effect of the cabinet door.

[0033] In one specific embodiment, please refer to Figure 10 This embodiment provides an enclosure structure for a prefabricated substation. The enclosure structure includes a base plate and a door. The door is mounted on the base plate, and the door and base plate enclose each other to form the closed enclosure of the prefabricated substation. A sealing device 100, as described above, is installed on the base plate to seal cables passing through it, preventing dust, salt spray, moisture, and small animals from entering the enclosure from the cable entry point. A door seal 200 is installed on the door to seal the gap between the door and the enclosure when the door is closed, forming a continuous and reliable door seal, thus providing all-around sealing protection for the entire prefabricated substation enclosure.

[0034] This application aims to protect a sealing device for the enclosure of a prefabricated substation. The technical solution uses the adjustable cooperation of the first clamping member 1 and the second clamping member 2 to compress the elastic sealing member 3, whose outer diameter is larger than that of the receiving cavity 4. This makes the outer wall of the elastic sealing member 3 fit tightly against the inner wall of the receiving cavity 4, and the inner wall of the wiring hole 31 fit tightly against the outer sheath of the cable 6. This not only prevents sand, salt spray, water vapor and other substances from entering the interior of the prefabricated substation, but also effectively blocks small organisms from entering the interior of the prefabricated substation. This improves the sealing effect of the wiring hole 31 of the prefabricated substation, which is conducive to ensuring the operating environment of the electrical components inside the prefabricated substation, extending the service life of the equipment, and reducing the operation and maintenance costs and power outage risks in harsh environments.

[0035] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A seal for a housing of a box-type substation, characterized in that, The utility model provides a box -type substation outer shell sealing structure, including first clamping piece (1), second clamping piece (2) and elastic sealing piece (3), first clamping piece (1) and second clamping piece (2) are all arranged in box -type substation outer shell, first clamping piece (1) is provided with first containing groove (11), second clamping piece (2) is provided with second containing groove (21) corresponding with first containing groove (11), first containing groove (11) and second containing groove (21) are enclosed and form containing cavity (4), elastic sealing piece (3) is arranged in containing cavity (4), the outer diameter of elastic sealing piece (3) is greater than the inner diameter of containing cavity (4), elastic sealing piece (3) is provided with threading hole (31), threading hole (31) is communicated with the inside and outside of box -type substation outer shell, first clamping piece (1) and second clamping piece (2) are connected through adjusting structure (5), adjusting structure (5) is used to drive first clamping piece (1) and second clamping piece (2) all towards elastic sealing piece (3) movement, so that the outer wall of elastic sealing piece (3) is attached to the inner wall of containing cavity (4), and the inner wall of threading hole (31) is attached to the outer wall of cable outer sheath (6).

2. The sealed enclosure for a box-type substation of claim 1, wherein, The adjusting structure (5) is a bolt connection structure, the bolt connection structure includes at least one fastening bolt, the first clamping piece (1) and the second clamping piece (2) are correspondingly provided with mounting holes, the fastening bolt is arranged in the mounting hole, and the first clamping piece (1) and the second clamping piece (2) are driven to move towards the elastic sealing piece (3) by rotating the fastening bolt.

3. The sealed enclosure for a box-type substation of claim 2, wherein, The mounting hole is a light hole, the bolt connection structure further includes a nut matched with the fastening bolt, the screw end of the fastening bolt passes through the light hole of the first clamping piece (1) and the second clamping piece (2) and is threadedly connected with the nut, and the nut end of the fastening bolt abuts against one side of the first clamping piece (1) away from the second clamping piece (2).

4. The pad-mounted transformer seal of claim 2, wherein, The mounting hole includes a light hole arranged in the first clamping piece (1) and a threaded hole arranged in the second clamping piece (2), the screw end of the fastening bolt is threadedly connected with the threaded hole after penetrating through the light hole, and the nut end of the fastening bolt abuts against one side of the first clamping piece (1) away from the second clamping piece (2).

5. The encased substation enclosure sealing arrangement of claim 1, wherein, The elastic sealing piece (3) is an integral annular structure, and the threading hole (31) is arranged through the elastic sealing piece (3) in the axial direction.

6. The outdoor enclosure for a box-type substation of claim 1, wherein, The elastic sealing piece (3) is a split structure, and the elastic sealing piece (3) includes two symmetrical half-ring sealing bodies, and the two half-ring sealing bodies enclose the threading hole (31).

7. A sealed enclosure for an electrical box, according to claims 5 or 6, wherein, The outer wall of the elastic sealing piece (3) is a cylindrical surface matched with the inner wall of the containing cavity (4), and the inner wall of the elastic sealing piece (3) is a cylindrical surface matched with the cable outer sheath (6).

8. The package substation enclosure sealing arrangement of claim 5 or 6, wherein, The elastic sealing piece (3) is made of weather-resistant rubber.

9. The encasement seal apparatus for a box-type substation of any one of claims 1 to 6, wherein, The sealing device further includes a clamping member (7) and a fastening screw (8). The clamping member (7) is disposed at the end of the elastic seal (3). The fastening screw (8) is threadedly connected to the clamping member (7) and the elastic seal (3) respectively. Tightening the fastening screw (8) can cause the clamping member (7) to compress the elastic seal (3) along the axial direction of the elastic seal (3), so that the elastic seal (3) expands radially along the elastic seal (3).

10. The pad-mounted transformer enclosure sealing apparatus of claim 9, wherein, The number of clamping members (7) is two, namely a first clamping member (71) and a second clamping member (72). The first clamping member (71) and the second clamping member (72) are respectively disposed at both ends of the elastic seal (3). The fastening screw (8) passes through the first clamping member (71), the elastic seal (3) and the second clamping member (72) in sequence. The fastening screw (8) is threadedly connected to the first clamping member (71), the elastic seal (3) and the second clamping member (72) respectively. Tightening the fastening screw (8) can cause the first clamping member (71) and the second clamping member (72) to compress the elastic seal (3) from both ends of the elastic seal (3) along the axial direction of the elastic seal (3), so that the elastic seal (3) expands radially along the elastic seal (3).

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