Waterproof and moisture-proof protection cover for high-voltage cable joint of pumped storage power station

Abstract

The utility model belongs to cable protection field, specifically discloses a kind of pumped storage power station high voltage cable joint waterproof moisture-proof protective cover, including protection box, the both sides of protection box are connected with cable tube by cable joint, and the end of two cable tubes extends to protection box and is mutually connected;The cable joint includes the connecting ring fixed in the outside of cable tube, the outside of connecting ring is equipped with joint, and the one end of joint is located in the radial outside of connecting ring and mutually adheres with connecting ring by first limit ring, and the middle part of joint is annularly distributed with multiple sliding grooves, and one clamping block is slidably connected in each sliding groove, and each clamping block is mutually connected by clamping sleeve, and installation cavity is formed between cable tube, connecting ring and joint, first spring is equipped in installation cavity, one end of first spring is equipped with the second limit ring located in installation cavity, and clamping block is fixedly connected to the outside of second limit ring.Therefore, the utility model can reduce the installation difficulty of cable while ensuring the sealing performance of cable joint.

Description

Technical Field

[0001] This utility model relates to a cable protection cover, and more particularly to a high-voltage waterproof and moisture-proof cover for a pumped storage power station. Background Technology

[0002] During the laying of high-voltage cable systems in pumped-storage power stations, protective covers are needed to connect two cables, ensuring cable continuity and connection stability. To achieve cable fixation and sealing, and to prevent external moisture and impurities from entering the protective cover through the joint between the cable and the cover, existing protective covers typically employ a multi-segment splicing structure. Multiple interfaces and multiple layers of seals are installed at the connection points between the protective cover and the cable. These interfaces are then aligned and bolted together, causing the seals to deform under pressure and achieve a seal. While this structure meets the safety requirements of high-voltage scenarios, it presents challenges due to its cumbersome installation process and high precision requirements, increasing the difficulty of cable installation and wiring for workers.

[0003] Therefore, existing high-voltage cable protection covers present difficulties in cable installation. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof and moisture-proof protective cover for high-voltage cable joints in pumped storage power stations. It can reduce the difficulty of cable installation while ensuring the sealing performance of the cable joints.

[0005] The technical solution of this utility model: a waterproof and moisture-proof protective cover for high-voltage cable joints in pumped storage power stations, including a protective box. Cable pipes are connected to both sides of the protective box via cable joints. The ends of two cable pipes extend into the protective box and are connected to each other. The cable joint includes a connecting ring fixed to the outside of the cable pipe. A connector is provided on the outside of the connecting ring. One end of the connector is located radially outside the connecting ring and is fitted to the connecting ring via a first limiting ring. The other end of the connector extends axially outside the connecting ring and is fixedly connected to the protective box. Multiple sliding grooves are distributed in a ring shape in the middle of the connector. A locking block is slidably connected in each groove. The outer sides of each locking block are connected to each other via a retainer. An installation cavity is formed between the cable pipe, the connecting ring, and the connector. A first spring is provided in the installation cavity. One end of the first spring is provided with a second limiting ring located in the installation cavity. The locking block is fixedly connected to the outside of the second limiting ring. Multiple clamping members are connected around the first limiting ring. The second limiting ring and the connecting ring are respectively connected to the two sides of the clamping members. The first spring is used to apply pressure toward the clamping member to the second limiting ring; The second limiting ring is used to apply a radially inward compressive force to the clamping member under the action of the first spring; The clamping member is used to limit the connecting ring under the squeezing force of the second limiting ring.

[0006] In the aforementioned waterproof and moisture-proof protective cover for the high-voltage cable joint of the pumped storage power station, the joint forms an installation part at the end away from the connecting ring, and one end of the first spring is in contact with the installation part.

[0007] In the aforementioned waterproof and moisture-proof protective cover for the high-voltage cable joint of the pumped storage power station, multiple pressure plates are distributed in a ring on one side of the second limiting ring, and the inner side of the pressure plate is in contact with the clamping member through an inclined surface.

[0008] In the aforementioned waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations, the clamping component is a steel ball. The steel ball is fastened to the first limiting ring through the mounting hole. The connecting ring is provided with a limiting groove that matches the steel ball. The inner side of the steel ball passes through the first limiting ring and is fastened to the limiting groove. The outer side of the steel ball is in contact with the inclined surface.

[0009] In the aforementioned waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations, the protective box includes a box body and a cover plate, and the two sides of the box body and the cover plate are connected to each other by a locking mechanism.

[0010] In the aforementioned waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations, the cover plate is provided with sealing strips that fit the box body at its four edges.

[0011] In the aforementioned waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations, the bottom of the cover plate is connected to the sealing strip via an annular groove, and the top of the box body is connected to the groove via an annular strip. The outer end of the sealing strip is in contact with the strip.

[0012] In the aforementioned waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations, the locking mechanism includes a fixed sleeve for fixing the connecting cover plate. Two locking plates are fastened to both ends of the fixed sleeve. The middle of the locking plate is rotatably connected to the box body. The locking plate forms a connecting piece at the end away from the fixed sleeve. The connecting pieces on both sides of the fixed sleeve are connected to each other by a second spring.

[0013] Compared with the prior art, this utility model has the following characteristics: (1) By limiting the structure of the cable connector, this utility model enables the cable pipe to be fixed after insertion by the cooperation of the connecting ring, the second limiting ring and the clamping member, thereby effectively preventing the axial movement of the cable after installation; at the same time, the cooperation of the connecting ring, the second limiting ring and the connector can wrap and seal the cable from the outside after insertion, effectively preventing external rainwater and impurities from entering the joint between the connector and the cable pipe and entering the protective cover; on this basis, when the cable pipe needs to be installed or removed, the operator only needs to slide the sleeve to drive the second limiting ring to disengage from the clamping member, which can release the clamping member from the limiting of the connecting ring, so that the cable pipe can be directly inserted or pulled out under the action of external force, thereby effectively reducing the difficulty of installing and removing the cable pipe; (2) By using steel balls as clamping parts and interlocking with the connecting ring, the clamping parts can be aligned and rigidly limited after the cable pipe is inserted and fixed, which effectively prevents the cable pipe and the connecting ring from slipping out under external force, thus ensuring the connection stability and sealing effect of the cable pipe. (3) By limiting the structure of the locking mechanism, the cover can be fixed by the locking mechanism after installation, thereby ensuring the sealing effect of the sealing strip on the box and the cover at the joint; on this basis, when the cover needs to be removed, the operator only needs to press the connecting parts on both sides of the fixing sleeve to drive the locking plate to disengage and open, thereby effectively reducing the difficulty of installing and removing the cover. Therefore, this utility model can reduce the difficulty of cable installation while ensuring the sealing performance of the cable joint. Attached Figure Description

[0014] Figure 1 This is an external view of Example 1; Figure 2 This is a schematic diagram of the cable connector structure in Example 1; Figure 3 This is an external view of Example 2; Figure 4 This is a schematic diagram of the structure of Embodiment 2 with part of the cover plate hidden; Figure 5 yes Figure 4 A magnified view from direction A.

[0015] The labels in the attached diagram are as follows: 1-Cable conduit, 2-Connecting ring, 3-Joint, 4-Card block, 5-Card sleeve, 6-Mounting cavity, 7-First spring, 8-Second limiting ring, 9-Clamping component, 10-Protective box, 11-Fixing sleeve, 12-Locking plate, 13-Second spring, 14-Sealing strip, 201-Limiting groove, 301-First limiting ring, 302-Sliding groove, 303-Mounting part, 304-Mounting hole, 801-Pressure plate, 101-Box body, 102-Cover plate, 103-Card groove, 104-Card strip, 121-Connecting component. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0017] Example 1. A waterproof and moisture-proof protective cover for the high-voltage cable joint of a pumped storage power station, comprising the following structure: Figure 1-2As shown, the device includes a protective box 10. Cable conduits 1 are connected to both sides of the protective box 10 via cable connectors. The ends of the two cable conduits 1 extend into the protective box 10 and are connected to each other. The cable connectors include connecting rings 2 fixed to the outside of the cable conduits 1. Connectors 3 are provided on the outside of the connecting rings 2. One end of the connector 3 is located radially outside the connecting rings 2 and is fitted to the connecting rings 2 via a first limiting ring 301. A first sealing ring can be provided at the fitting point between the first limiting ring 301 and the connecting rings 2 for sealing. The other end of the connector 3 extends axially outside the connecting rings 2 and is fixedly connected to the protective box 10. Multiple grooves 302 are distributed in a ring shape in the middle of the connector 3. Each groove 302 has a sliding block 4 slidably connected to it. The sliding direction of the locking block 4 is the axial direction of the connector 3. The outer sides of each locking block 4 are connected to each other via a retaining sleeve 5. The retaining sleeve 5 is fitted on the outside of the connector 3 and slidably connected to the connector 3. An installation cavity 6 is formed between the cable pipe 1, the connecting ring 2 and the connector 3. A first spring 7 is provided in the installation cavity 6. One end of the first spring 7 is provided with a second limiting ring 8 located in the installation cavity 6. The second limiting ring 8 is slidably connected to the inner wall of the connector 3. The locking block 4 is fixedly connected to the outside of the second limiting ring 8. Multiple clamping members 9 are connected around the first limiting ring 301. The second limiting ring 8 and the connecting ring 2 are respectively connected to the two sides of the clamping members 9. The first spring 7 is used to apply pressure toward the clamping member 9 to the second limiting ring 8; The second limiting ring 8 is used to apply a radially inward compressive force to the clamping member 9 under the action of the first spring 7; The clamping member 9 is used to limit the connecting ring 2 under the squeezing force of the second limiting ring 8.

[0018] The sleeve 5, the block 4, and the second limiting ring 8 are connected to each other by screws.

[0019] The first limiting ring 301 and the connector 3 are nested inside and outside and connected to each other by a connecting rib. The connecting rib is located on the outer side of the end of the mounting cavity 6 and seals the mounting cavity 6. The first limiting ring 301, the connector 3 and the connecting rib are integrally formed and the connecting rib and the clamping member 9 are offset from each other along the axial direction.

[0020] The connector 3 forms an L-shaped mounting portion 303 at the end away from the connecting ring 2. The protective box 10 is fixedly connected to the outside of the mounting portion 303. A second sealing ring can be provided between the mounting portion 303 and the protective box 10 for sealing. One end of the first spring 7 is in contact with the inner end of the mounting portion 303.

[0021] The second limiting ring 8 has multiple pressure plates 801 distributed in a ring on one side. Each pressure plate 801 corresponds to a clamping member 9. The inner side of the pressure plate 801 is in contact with the clamping member 9 via an inclined surface.

[0022] The clamping component 9 is a steel ball. The steel ball is fastened to the first limiting ring 301 through the mounting hole 304. The connecting ring 2 is provided with a limiting groove 201 that matches the steel ball. The inner side of the steel ball passes through the first limiting ring 301 and is fastened to the limiting groove 201. The outer side of the steel ball is in contact with the inclined surface.

[0023] In this embodiment, during use, the operator first slides the sleeve 5 axially to move the second limiting ring 8 away from the clamping member 9, thereby releasing the radial limitation on the clamping member 9. Then, the cable pipe 1 with the connecting ring 2 fixed thereon passes through the middle of the connector 3 and extends into the protective box 10, causing the limiting groove 201 on the connecting ring 2 to engage with the clamping member 9, thereby achieving axial limitation on the cable pipe 1. After the cable pipe 1 is inserted into place, the operator releases the sleeve 5, causing the first spring 7 to drive the second limiting ring 8 to slide to the limiting position, and the pressure plate 801 squeezes and limits the radial position of the clamping member 9, preventing the clamping member 9 from moving radially outward in this state, thus ensuring the stable engagement and limitation of the clamping member 9 with the connecting ring 2.

[0024] With the above-mentioned coordination, operators can quickly insert and remove cable conduit 1 simply by sliding the clamp 5, effectively reducing the difficulty of fixing cable conduit 1. At the same time, after cable conduit 1 is inserted, the cable connector can achieve rigid positioning and sealing, ensuring the fixing and sealing effect of cable conduit 1.

[0025] Example 2. A waterproof and moisture-proof protective cover for the high-voltage cable joint of a pumped storage power station, comprising the following structure: Figure 3-5 As shown, the device includes a protective box 10. Cable conduits 1 are connected to both sides of the protective box 10 via cable connectors. The ends of two cable conduits 1 extend into the protective box 10 and are connected to each other. The cable connectors include connecting rings 2 fixed to the outside of the cable conduits 1. A connector 3 is provided on the outside of the connecting rings 2. One end of the connector 3 is located radially outside the connecting rings 2 and is fitted to the connecting rings 2 via a first limiting ring 301. A first sealing ring can be provided at the fitting point between the first limiting ring 301 and the connecting rings 2 for sealing. The other end of the connector 3 extends axially outside the connecting rings 2 and is fixedly connected to the protective box 10. Multiple grooves 302 are arranged in a ring shape in the middle of the connector 3. Each groove 302 has a sliding block 4 slidably connected to it. The sliding direction of the locking block 4 is the axial direction of the connector 3. The outer sides of each locking block 4 are connected to each other via a retaining sleeve 5. The retaining sleeve 5 is fitted on the outside of the connector 3 and slidably connected to the connector 3. An installation cavity 6 is formed between the cable pipe 1, the connecting ring 2 and the connector 3. A first spring 7 is provided in the installation cavity 6. One end of the first spring 7 is provided with a second limiting ring 8 located in the installation cavity 6. The second limiting ring 8 is slidably connected to the inner wall of the connector 3. The locking block 4 is fixedly connected to the outside of the second limiting ring 8. Multiple clamping members 9 are connected around the first limiting ring 301. The second limiting ring 8 and the connecting ring 2 are respectively connected to the two sides of the clamping members 9. The first spring 7 is used to apply pressure toward the clamping member 9 to the second limiting ring 8; The second limiting ring 8 is used to apply a radially inward compressive force to the clamping member 9 under the action of the first spring 7; The clamping member 9 is used to limit the connecting ring 2 under the squeezing force of the second limiting ring 8.

[0026] The sleeve 5, the block 4, and the second limiting ring 8 are connected to each other by screws.

[0027] The first limiting ring 301 and the connector 3 are nested inside and outside and connected to each other by a connecting rib. The connecting rib is located on the outer side of the end of the mounting cavity 6 and seals the mounting cavity 6. The first limiting ring 301, the connector 3 and the connecting rib are integrally formed and the connecting rib and the clamping member 9 are offset from each other along the axial direction.

[0028] The connector 3 forms an L-shaped mounting portion 303 at the end away from the connecting ring 2. The protective box 10 is fixedly connected to the outside of the mounting portion 303. A second sealing ring can be provided between the mounting portion 303 and the protective box 10 for sealing. One end of the first spring 7 is in contact with the inner end of the mounting portion 303.

[0029] The second limiting ring 8 has multiple pressure plates 801 distributed in a ring on one side. Each pressure plate 801 corresponds to a clamping member 9. The inner side of the pressure plate 801 is in contact with the clamping member 9 via an inclined surface.

[0030] The clamping component 9 is a steel ball. The steel ball is fastened to the first limiting ring 301 through the mounting hole 304. The connecting ring 2 is provided with a limiting groove 201 that matches the steel ball. The inner side of the steel ball passes through the first limiting ring 301 and is fastened to the limiting groove 201. The outer side of the steel ball is in contact with the inclined surface.

[0031] The protective box 10 includes a box body 101 and a cover plate 102, and the two sides of the box body 101 and the cover plate 102 are connected to each other by a locking mechanism.

[0032] The cover plate 102 is provided with sealing strips 14 that fit the box body 101 at its four edges.

[0033] The bottom of the cover plate 102 is fastened to the sealing strip 14 via an annular groove 103, and the top of the box body 101 is fastened to the groove 103 via an annular strip 104. The outer end of the sealing strip 14 is in contact with the strip 104.

[0034] The locking mechanism includes a fixing sleeve 11 that is fixedly connected to the cover plate 102. Two locking plates 12 are fastened to both ends of the fixing sleeve 11. The locking plates 12 are L-shaped. The middle part of the locking plates 12 is rotatably connected to the box body 101. A connector 121 is formed at the end of the locking plate 12 away from the fixing sleeve 11. The connectors 121 on both sides of the fixing sleeve 11 are connected to each other by a second spring 13.

[0035] Based on Embodiment 1, this embodiment further defines the structure of the protective cover. By defining the connection structure between the box body 101 and the cover plate 102, the box body 101 and the cover plate 102 can be interlocked during installation through the cooperation of the slot 103 and the clip 104, and sealed by the sealing strip 14, thereby ensuring the sealing performance of the connection between the two.

[0036] Furthermore, by defining the structure of the locking mechanism, on the one hand, the cover plate 102 can be locked and pressed firmly after installation, ensuring the sealing effect of the box body 101 and the cover plate 102. On the other hand, during operation, the operator only needs to tighten or loosen the connecting piece 121 to unlock and lock the cover plate 102, which effectively improves the operator's ease of operation.

[0037] Example 3. A waterproof and moisture-proof protective cover for the high-voltage cable joint of a pumped storage power station, comprising the following structure: Figure 3-5 As shown, the device includes a protective box 10, with cable conduits 1 connected to both sides of the protective box 10 via cable connectors. These cable connectors are conventional cable connectors used in the field for cable protection covers. The protective box 10 includes a box body 101 and a cover plate 102, with the two sides of the box body 101 and the cover plate 102 connected to each other via a locking mechanism.

[0038] The cover plate 102 is provided with sealing strips 14 that fit the box body 101 at its four edges.

[0039] The bottom of the cover plate 102 is fastened to the sealing strip 14 via an annular groove 103, and the top of the box body 101 is fastened to the groove 103 via an annular strip 104. The outer end of the sealing strip 14 is in contact with the strip 104.

[0040] The locking mechanism includes a fixing sleeve 11 that is fixedly connected to the cover plate 102. Two locking plates 12 are fastened to both ends of the fixing sleeve 11. The locking plates 12 are L-shaped. The middle part of the locking plates 12 is rotatably connected to the box body 101. A connector 121 is formed at the end of the locking plate 12 away from the fixing sleeve 11. The connectors 121 on both sides of the fixing sleeve 11 are connected to each other by a second spring 13.

[0041] This embodiment limits the connection structure between the box body 101 and the cover plate 102, so that the box body 101 and the cover plate 102 can be interlocked by the cooperation of the slot 103 and the strip 104 during installation, and sealed by the sealing strip 14, thereby ensuring the sealing performance of the connection between the two.

[0042] Example 4. A waterproof and moisture-proof protective cover for the high-voltage cable joint of a pumped storage power station, comprising the following structure: Figure 1-2 As shown, the device includes a protective box 10. Cable conduits 1 are connected to both sides of the protective box 10 via cable connectors. The ends of the two cable conduits 1 extend into the protective box 10 and are connected to each other. The cable connectors include connecting rings 2 fixed to the outside of the cable conduits 1. Connectors 3 are provided on the outside of the connecting rings 2. One end of the connector 3 is located radially outside the connecting rings 2 and is fitted to the connecting rings 2 via a first limiting ring 301. A first sealing ring can be provided at the fitting point between the first limiting ring 301 and the connecting rings 2 for sealing. The other end of the connector 3 extends axially outside the connecting rings 2 and is fixedly connected to the protective box 10. Multiple grooves 302 are distributed in a ring shape in the middle of the connector 3. Each groove 302 has a sliding block 4 slidably connected to it. The sliding direction of the locking block 4 is the axial direction of the connector 3. The outer sides of each locking block 4 are connected to each other via a retaining sleeve 5. The retaining sleeve 5 is fitted on the outside of the connector 3 and slidably connected to the connector 3. An installation cavity 6 is formed between the cable pipe 1, the connecting ring 2 and the connector 3. A first spring 7 is provided in the installation cavity 6. One end of the first spring 7 is provided with a second limiting ring 8 located in the installation cavity 6. The second limiting ring 8 is slidably connected to the inner wall of the connector 3. The locking block 4 is fixedly connected to the outside of the second limiting ring 8. Multiple clamping members 9 are connected around the first limiting ring 301. The second limiting ring 8 and the connecting ring 2 are respectively connected to the two sides of the clamping members 9. The first spring 7 is used to apply pressure toward the clamping member 9 to the second limiting ring 8; The second limiting ring 8 is used to apply a radially inward compressive force to the clamping member 9 under the action of the first spring 7; The clamping member 9 is used to limit the connecting ring 2 under the squeezing force of the second limiting ring 8.

[0043] The sleeve 5, the block 4, and the second limiting ring 8 are connected to each other by screws.

[0044] The first limiting ring 301 and the connector 3 are nested inside and outside and connected to each other by a connecting rib. The connecting rib is located on the outer side of the end of the mounting cavity 6 and seals the mounting cavity 6. The first limiting ring 301, the connector 3 and the connecting rib are integrally formed and the connecting rib and the clamping member 9 are offset from each other along the axial direction.

[0045] The connector 3 forms an L-shaped mounting portion 303 at the end away from the connecting ring 2. The protective box 10 is fixedly connected to the outside of the mounting portion 303. A second sealing ring can be provided between the mounting portion 303 and the protective box 10 for sealing. One end of the first spring 7 is in contact with the inner end of the mounting portion 303.

[0046] The second limiting ring 8 has multiple pressure plates 801 distributed in a ring on one side. Each pressure plate 801 corresponds to a clamping member 9. The inner side of the pressure plate 801 is in contact with the clamping member 9 via an inclined surface.

[0047] The clamping component 9 is a nylon block or a rubber block. The steel ball is fastened to the first limiting ring 301 through the mounting hole 304. The connecting ring 2 is provided with a limiting groove 201 that matches the clamping component 9. The inner side of the clamping component 9 passes through the first limiting ring 301 and is fastened to the limiting groove 201. The outer side of the clamping component 9 is in contact with the inclined surface.

[0048] Compared with Example 1, this example adjusts the material and structure of the clamping member 9, which can also achieve the function of limiting the cable after insertion.

[0049] Example 5. A waterproof and moisture-proof protective cover for the high-voltage cable joint of a pumped storage power station, comprising the following structure: Figure 1-2 As shown, the device includes a protective box 10. Cable conduits 1 are connected to both sides of the protective box 10 via cable connectors. The ends of the two cable conduits 1 extend into the protective box 10 and are connected to each other. The cable connectors include connecting rings 2 fixed to the outside of the cable conduits 1. Connectors 3 are provided on the outside of the connecting rings 2. One end of the connector 3 is located radially outside the connecting rings 2 and is fitted to the connecting rings 2 via a first limiting ring 301. A first sealing ring can be provided at the fitting point between the first limiting ring 301 and the connecting rings 2 for sealing. The other end of the connector 3 extends axially outside the connecting rings 2 and is fixedly connected to the protective box 10. Multiple grooves 302 are distributed in a ring shape in the middle of the connector 3. Each groove 302 has a sliding block 4 slidably connected to it. The sliding direction of the locking block 4 is the axial direction of the connector 3. The outer sides of each locking block 4 are connected to each other via a retaining sleeve 5. The retaining sleeve 5 is fitted on the outside of the connector 3 and slidably connected to the connector 3. An installation cavity 6 is formed between the cable pipe 1, the connecting ring 2 and the connector 3. A first spring 7 is provided in the installation cavity 6. One end of the first spring 7 is provided with a second limiting ring 8 located in the installation cavity 6. The second limiting ring 8 is slidably connected to the inner wall of the connector 3. The locking block 4 is fixedly connected to the outside of the second limiting ring 8. Multiple clamping members 9 are connected around the first limiting ring 301. The second limiting ring 8 and the connecting ring 2 are respectively connected to the two sides of the clamping members 9. The first spring 7 is used to apply pressure toward the clamping member 9 to the second limiting ring 8; The second limiting ring 8 is used to apply a radially inward compressive force to the clamping member 9 under the action of the first spring 7; The clamping member 9 is used to limit the connecting ring 2 under the squeezing force of the second limiting ring 8.

[0050] The two ends of the card block 4 extend to the inner and outer sides of the connector 3 respectively and are engaged with the card sleeve 5 and the second limiting ring 8. The card sleeve 5, the card block 4 and the second limiting ring 8 are glued together at the engagement point.

[0051] The first limiting ring 301 and the connector 3 are nested inside and outside and connected to each other by a connecting rib. The connecting rib is located on the outer side of the end of the mounting cavity 6 and seals the mounting cavity 6. The first limiting ring 301, the connector 3 and the connecting rib are integrally formed and the connecting rib and the clamping member 9 are offset from each other along the axial direction.

[0052] The connector 3 forms an L-shaped mounting portion 303 at the end away from the connecting ring 2. The protective box 10 is fixedly connected to the outside of the mounting portion 303. A second sealing ring can be provided between the mounting portion 303 and the protective box 10 for sealing. One end of the first spring 7 is in contact with the inner end of the mounting portion 303.

[0053] The second limiting ring 8 has multiple pressure plates 801 distributed in a ring on one side. Each pressure plate 801 corresponds to a clamping member 9. The inner side of the pressure plate 801 is in contact with the clamping member 9 via an inclined surface.

[0054] The clamping component 9 is a nylon block or a rubber block. The steel ball is fastened to the first limiting ring 301 through the mounting hole 304. The connecting ring 2 is provided with a limiting groove 201 that matches the clamping component 9. The inner side of the clamping component 9 passes through the first limiting ring 301 and is fastened to the limiting groove 201. The outer side of the clamping component 9 is in contact with the inclined surface.

[0055] Compared with Embodiment 1, this embodiment adjusts the connection structure of the card sleeve 5, card block 4 and second limiting ring 8, which can also achieve its limiting and driving functions.

Claims

1. A waterproof and moisture-proof protective cover for high-voltage cable joints in pumped storage power stations, characterized in that: The system includes a protective box (10), with cable pipes (1) connected to both sides of the protective box (10) via cable connectors. The ends of the two cable pipes (1) extend into the protective box (10) and are connected to each other. The cable connectors include a connecting ring (2) fixed to the outside of the cable pipes (1). A connector (3) is provided on the outside of the connecting ring (2). One end of the connector (3) is located radially outside the connecting ring (2) and is fitted to the connecting ring (2) via a first limiting ring (301). The other end of the connector (3) extends axially outside the connecting ring (2) and is fixedly connected to the protective box (10). Multiple sliding joints are distributed in a ring shape in the middle of the connector (3). The groove (302) has a sliding block (4) connected in each groove (302). The outer sides of each block (4) are connected to each other through a sleeve (5). An installation cavity (6) is formed between the cable pipe (1), the connecting ring (2) and the connector (3). A first spring (7) is provided in the installation cavity (6). A second limiting ring (8) is located in the installation cavity (6) at one end of the first spring (7). The outer side of the second limiting ring (8) is fixedly connected to the block (4). Multiple clamping members (9) are connected around the first limiting ring (301). The second limiting ring (8) and the connecting ring (2) are respectively connected to the two sides of the clamping members (9). The first spring (7) is used to apply pressure toward the clamping member (9) to the second limiting ring (8); The second limiting ring (8) is used to apply a radially inward compressive force to the clamping member (9) under the action of the first spring (7); The clamping member (9) is used to limit the connecting ring (2) under the squeezing force of the second limiting ring (8).

2. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 1, characterized in that: The connector (3) forms a mounting part (303) at the end away from the connecting ring (2), and one end of the first spring (7) is in contact with the mounting part (303).

3. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 1, characterized in that: The second limiting ring (8) has multiple pressure plates (801) arranged in a ring on one side, and the inner side of the pressure plate (801) is in contact with the clamping member (9) through the inclined surface.

4. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 3, characterized in that: The clamping component (9) is a steel ball. The steel ball is fastened to the first limiting ring (301) through the mounting hole (304). The connecting ring (2) is provided with a limiting groove (201) that matches the steel ball. The inner side of the steel ball passes through the first limiting ring (301) and is fastened to the limiting groove (201). The outer side of the steel ball is in contact with the inclined surface.

5. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 1, characterized in that: The protective box (10) includes a box body (101) and a cover plate (102), and the two sides of the box body (101) and the cover plate (102) are connected to each other by a locking mechanism.

6. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 5, characterized in that: The cover plate (102) is provided with a sealing strip (14) that fits the box body (101) at its four edges.

7. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 6, characterized in that: The bottom of the cover plate (102) is fastened to the sealing strip (14) via an annular groove (103), and the top of the box body (101) is fastened to the groove (103) via an annular strip (104). The outer end of the sealing strip (14) is in contact with the strip (104).

8. The waterproof and moisture-proof protective cover for high-voltage cable joints of pumped storage power stations according to claim 5, characterized in that: The locking mechanism includes a fixed sleeve (11) for fixing the cover plate (102). Two locking plates (12) are fastened to both ends of the fixed sleeve (11). The middle part of the locking plate (12) is rotatably connected to the box body (101). A connector (121) is formed at the end of the locking plate (12) away from the fixed sleeve (11). The connectors (121) on both sides of the fixed sleeve (11) are connected to each other by a second spring (13).

Images