A ring main unit protection method and device

Abstract

This invention discloses a method for protecting a ring main unit (RNB), comprising: assembling an outer protective plate onto the top of the RNB cable trench; laying a flexible waterproof membrane on the outer protective plate; sequentially installing an inner protective plate and a frame on the flexible waterproof membrane according to the assembly creases; folding the flexible waterproof membrane again according to the assembly creases to cover the outside of the frame; and then installing side protective plates. The flexible waterproof membrane is sandwiched between the side protective plates and the frame, and between the inner and outer protective plates, forming a protective body that can be laid flat and opened on all four sides. This invention also discloses a protective device for RNBs. The RNB protection method and device of this invention can achieve waterproofing of the RNB at a lower cost without changing the outer casing structure, the installation method, or moving the cabinet; the structure is reasonable and easy to construct and install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply equipment, in particular to a ring main unit protection method and device. BACKGROUND

[0002] In the prior art, the following methods are mainly used to prevent ring main units from being flooded: 1. designing a ring main unit with a water-tight function or modifying the structure of an existing ring main unit to achieve a water-proof effect; and 2. designing an auxiliary mechanism to raise the ring main unit during the water accumulation period to prevent flooding.

[0003] The above protection methods have certain limitations, mainly in that they require changes to the structure and installation structure of the cabinet, which involves huge costs in design, manufacturing and construction, and at the same time, non-standardization problems will be caused, which will increase maintenance and repair costs; the method of improving the ring main unit cabinet is obviously only to change the installation method, but the ring main unit is a static device, and frequently raising the cabinet body will pull in and out of the cable, which is easy to cause equipment failure; and the method of adding a sealing structure has problems such as affecting heat dissipation and the equipment being prone to moisture. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a ring main unit protection method and device, which can achieve the water-proofing of the ring main unit at a low cost without changing the structure of the outer box, the installation method or the cabinet body.

[0005] To solve the above technical problems, the present application provides a ring main unit protection method, which comprises the following steps: folding an entire seamless flexible waterproof membrane from four sides to form an assembly crease, configuring a frame, an inner protection plate, an outer protection plate and a side protection plate with sizes matching the assembly crease, assembling the outer protection plate on the top of the cable trench of the ring main unit, laying the flexible waterproof membrane on the outer protection plate, and sequentially assembling the inner protection plate and the frame on the flexible waterproof membrane according to the trace of the assembly crease, folding the flexible waterproof membrane again according to the assembly crease, covering it outside the frame, and then assembling the side protection plate, the flexible waterproof membrane being clamped between the side protection plate and the frame and the inner protection plate and the outer protection plate to form a protection body that can be opened flat on four sides, and opening a glue-filling sealing assembly for the cables of the ring main unit at a position corresponding to the matching positions of the inner protection plate, the flexible waterproof membrane and the outer protection plate.

[0006] The method further comprises the step of assembling a hinge on the frame and the inner protection plate and the side protection plate and the outer protection plate.

[0007] The method further comprises the step of assembling a ventilation and drainage assembly in the protection body after the step of forming a protection body that can be opened flat on four sides.

[0008] The step of opening the glue-filling sealing assembly for the cable of the ring main unit to pass through at the corresponding position of the inner protection plate, the flexible waterproof membrane and the outer protection plate comprises the following steps: setting a waterproof flange at the bottom of the protection body, and performing glue-filling sealing after the cable of the ring main unit passes through the waterproof flange.

[0009] To solve the above technical problems, the application further discloses a ring main unit protection device, which is characterized by comprising: a flexible waterproof membrane capable of being folded from four sides to form assembly creases, and a frame, an inner protection plate, an outer protection plate and a side protection plate which are matched with the size of the assembly creases.

[0010] The outer protection plate is assembled at the top of the cable trench of the ring main unit, the flexible waterproof membrane is laid on the outer protection plate, and the inner protection plate is laid at the middle part of the flexible waterproof membrane to press the middle part of the flexible waterproof membrane against the outer protection plate.

[0011] The flexible waterproof membrane is folded according to the assembly creases, the side protection plate is connected to the frame, the side protection plate presses the four peripheral ends of the flexible waterproof membrane against the outside of the frame, the flexible waterproof membrane is respectively clamped between the side protection plate and the frame and between the inner protection plate and the outer protection plate, and the protection body capable of being opened flat from four sides is formed.

[0012] The flexible waterproof membrane is made by compounding PVC calendering membranes on both sides of a layer of high-strength polyester or chinlon through heating and pressurizing, the frame can be opened flat from four sides, and the frame is made of aluminum alloy material.

[0013] Hinges are arranged between the frame and the inner protection plate, and hinges are arranged between the side protection plate and the outer protection plate.

[0014] The waterproof flange is arranged at the bottom of the protection body, and glue-filling sealing is performed after the cable of the ring main unit passes through the waterproof flange.

[0015] A ventilation and drainage assembly is arranged in the protection body.

[0016] The inner protection plate and the frame are rigidly connected with the outer wall of the ring main unit.

[0017] The application discloses a kind of ring main unit protection methods and devices, with the beneficial effects as follows: the whole seamless flexible waterproof membrane is folded from four sides to form assembly creases, the size of assembly creases is configured with the size of the frame, inner protection plate, outer protection plate and side protection plate matched with the assembly creases;The outer protection plate is assembled at the top of the ring main unit cable trench, the flexible waterproof membrane is laid on the outer protection plate, and the inner protection plate and the frame are sequentially installed on the flexible waterproof membrane according to the trace of the assembly crease;The flexible waterproof membrane is folded again according to the assembly crease, and the side protection plate is installed after being wrapped outside the frame, and the flexible waterproof membrane is clamped between the side protection plate and the frame and the inner protection plate and the outer protection plate, forming a protection body that can be opened flat on four sides, which can realize the waterproofing of the ring main unit at a lower cost without changing the outer box structure, installation method and moving the cabinet body. The structure is reasonable, and easy to construct and install. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The flowchart of the ring main unit protection method of the embodiment of the present application.

[0020] Figure 2 The effect diagram of the embodiment of the present application is shown, which is the whole seamless flexible waterproof membrane folded from four sides to form assembly creases.

[0021] Figure 3 The cross-sectional structure diagram of the ring main unit protection device of the embodiment of the present application.

[0022] Figure 4 The structure diagram of the embodiment of the present application is shown, which is the flexible waterproof membrane installed with a ventilation and drainage assembly. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] As shown in the embodiment one of the ring main unit protection method of the present application. Figures 1-2

[0025] ​The ring main unit protection method in the embodiment comprises the following steps:

[0026] S10, the whole seamless flexible waterproof film is folded from four sides to form an assembly crease, and a frame, an inner protection plate, an outer protection plate and a side protection plate with sizes matching the assembly crease are arranged according to the size of the assembly crease;

[0027] S20, the outer protection plate is assembled at the top of the cable trench of the ring main unit, the flexible waterproof film is laid on the outer protection plate, and the inner protection plate and the frame are sequentially arranged on the flexible waterproof film according to the trace of the assembly crease;

[0028] S30, the flexible waterproof film is folded again according to the assembly crease, and the side protection plate is arranged after the flexible waterproof film is wrapped outside the frame, the flexible waterproof film is clamped between the side protection plate and the frame and between the inner protection plate and the outer protection plate, and a protection body that can be opened flat from four sides is formed;

[0029] S40, a glue filling sealing assembly for the cable of the ring main unit to pass through is arranged at the corresponding position matching the inner protection plate, the flexible waterproof film and the outer protection plate.

[0030] In the step S10, the flexible waterproof film 1 is composed of high-strength polyester or chinlon on both sides and PVC calendering film by heating and pressing. The flexible waterproof film 1 has the advantages of firm structure, non-flammability, high strength, cold resistance, high temperature resistance and excellent stability. In the actual design and production process, the size of the bottom of the ring main unit and the size of the bottom of the outer box are first measured and drawn, and the height of the side protection is considered, and then the area and size of the waterproof film, the position of the cable inlet and outlet hole are determined.

[0031] The assembly crease t is folded on the flexible waterproof film 1, so that the sizes of the frame 2, the inner protection plate 3, the outer protection plate 4 and the side protection plate 5 are more easily arranged, and the assembly is more convenient.

[0032] In the step S20, the frame 2 is assembled from rigid materials, and the assembled frame 2 is cubic, which can be made of aluminum alloy. The frame 2 can be opened flat from four sides. In this way, the ring main unit protection device can also be opened flat from four sides, which facilitates the opening and closing of the door of the ring main unit 8 and is easy to maintain and repair. In the implementation, the corresponding frame 2 can be designed and manufactured according to the required protection height and bottom area of the ring main unit, so as to meet the strength requirements under certain water depth.

[0033] The outer protection plate 4 and the inner protection plate 3 are plate-shaped and made of high molecular materials. The outer protection plate 4 is assembled at the top of the cable trench of the ring main unit, the flexible waterproof film 1 is laid on the outer protection plate 4, and the inner protection plate 3 is laid in the middle of the flexible waterproof film 1, and the inner protection plate 3 presses the middle of the flexible waterproof film 1 against the outer protection plate 4. The flexible waterproof film 1 is 1a before being folded to form the assembly crease t, and the shape after being assembled according to the assembly crease t is 1b.

[0034] Preferably, hinges are arranged between the frame 2 and the inner guard plate 3, so that the frame 2 can be opened flat from four sides, facilitating on-site quick installation and preventing wear and damage.

[0035] In step S30, the side guard plate 5 is made of a high polymer material and can be detachably connected to the frame 2. In implementation, the flexible waterproof membrane 1 is folded according to the assembly crease t, and the side guard plate 5 is connected to the frame 2. The side guard plate 5 presses the four peripheral ends of the flexible waterproof membrane 1 against the outside of the frame 2, and the flexible waterproof membrane 1 is clamped between the side guard plate 5 and the frame 2 and between the inner guard plate 3 and the outer guard plate 4, forming a protective body p that can be opened flat from four sides. Hinges are arranged between the side guard plate 5 and the outer guard plate 4, so that the protective body p can be opened flat from four sides, facilitating on-site quick installation and preventing wear and damage.

[0036] In step S40, a waterproof flange 6 is arranged at the bottom of the protective body p, and the cable 81 of the ring main unit 8 is sealed by pouring glue after passing through the waterproof flange 6. In this embodiment, the waterproof flange 6 is a closed water cable flange with high water tightness and strong structure, which can be assembled firmly and can maintain water tightness under the pressure of a certain water depth. The waterproof flange 6 is formed by pressure injection of sealing material, that is, the production method of glue sealing.

[0037] Further, after step S30, it further includes the step S301 of arranging a ventilation and drainage assembly in the protective body p. The ventilation and drainage assembly 9 includes a temperature and humidity sensor, a water intrusion sensor, and a video monitoring device in specific implementation, which can realize intelligent control of the fan and the drainage pump. When necessary, the fan can be used for ventilation and heat dissipation to promote air circulation and circulation. At the same time, considering that the waterproof structure may be damaged in the case of external damage, the system is equipped with a water immersion sensor and a drainage pump, which can alarm and drain water in the case of water inflow, ensuring the normal operation of the equipment.

[0038] As shown in FIG. 1, it is an embodiment one of the ring main unit protection device of the present application. Figures 3-4

[0039] The ring main unit protection device in this embodiment includes a flexible waterproof membrane 1 that can be folded from four sides to form an assembly crease t, and a frame 2, an inner guard plate 3, an outer guard plate 4, and a side guard plate 5 that are adapted to the size of the assembly crease t.

[0040] ​In practical implementation, the flexible waterproof membrane 1 is formed by laminating a layer of high-strength polyester or nylon with PVC calendered film on both sides under heat and pressure. The flexible waterproof membrane 1 features a robust structure, is non-flammable, has high strength, is resistant to both cold and high temperatures, and exhibits excellent stability. During the actual design and manufacturing process, the dimensions of the bottom of the ring main unit and the bottom of the outer casing must first be measured, while also considering the side protection height, to determine the area and dimensions of the waterproof membrane and the location of cable entry and exit points.

[0041] By folding assembly creases t into the flexible waterproof membrane 1, it is easier to configure the dimensions of the frame 2, inner protective plate 3, outer protective plate 4, and side protective plate 5, making assembly faster.

[0042] Frame 2 is assembled from rigid materials, forming a cubic shape. It can be made of aluminum alloy and can be laid flat and opened from all four sides. This allows the ring main unit's protective device to also be laid flat and opened from all four sides, facilitating the opening and closing of the ring main unit's doors and simplifying inspection and maintenance. During implementation, the frame 2 can be designed and manufactured according to the required protection height and bottom area of ​​the ring main unit to meet the strength requirements under certain water depth conditions.

[0043] The outer protective plate 4 and the inner protective plate 3 are both plate-shaped and made of polymer material. The outer protective plate 4 is assembled on the top of the cable trench of the ring main unit. The flexible waterproof membrane 1 is laid on the outer protective plate 4, and the inner protective plate 3 is laid in the middle of the flexible waterproof membrane 1. The inner protective plate 3 presses the middle of the flexible waterproof membrane 1 against the outer protective plate 4.

[0044] Preferably, a hinge is installed between the frame 2 and the inner protective plate 3, so that the frame 2 can be opened flat from all four sides, which facilitates quick on-site installation and prevents wear and damage.

[0045] Understandably, the fixing bolts to the bottom of the ring main unit's outer casing were removed during the installation of the outer protective plate 4. This reduced the number of openings on the bottom flexible waterproof membrane 1, allowing for a rigid connection between the inner protective plate 3 and the frame 2 and the outer wall of the ring main unit 8, thereby achieving a non-penetrating assembly and fixing method for the ring main unit 8.

[0046] The side protective plate 5 is made of polymer material and can be detachably connected to the frame 2. In practice, the flexible waterproof membrane 1 is folded along the assembly crease t, and the side protective plate 5 is connected to the frame 2. The side protective plate 5 presses the four sides of the flexible waterproof membrane 1 against the outside of the frame 2. The flexible waterproof membrane 1 is sandwiched between the side protective plate 5 and the frame 2, as well as between the inner protective plate 3 and the outer protective plate 4, forming a protective body p that can be laid flat and opened on all four sides.

[0047] Preferably, a hinge is installed between the side protective plate 5 and the outer protective plate 4, so that the protective body p can be laid flat and opened from all four sides, which facilitates quick on-site installation and prevents wear and damage.

[0048] Furthermore, a waterproof flange 6 is installed at the bottom of the protective body p. The cable 81 of the ring main unit 8 passes through the waterproof flange 6 and is then sealed with glue. In this embodiment, the waterproof flange 6 is a watertight cable-passing flange with high water tightness and a robust structure. It can be firmly assembled and maintain water tightness under pressure at a certain water depth.

[0049] Preferably, the waterproof flange 6 is formed by pressure injection of potting material, which is a method of making a sealant by potting.

[0050] Furthermore, the protective enclosure p is equipped with a ventilation and drainage assembly 9. In practice, the ventilation and drainage assembly 9 includes temperature and humidity sensors, water intrusion sensors, and video monitoring, enabling intelligent control of the fan and drainage pump. When necessary, the fan can be used for ventilation and heat dissipation, promoting air circulation. Simultaneously, considering the possibility of damage to the waterproof structure under external force, the system is equipped with a water immersion sensor and a drainage pump. In the event of water ingress, an alarm will sound and drainage will be initiated, ensuring the normal operation of the equipment.

[0051] In this embodiment, the protective device for the ring main unit is implemented such that the outer protective plate 4 is assembled on the top of the cable trench of the ring main unit, the flexible waterproof membrane 1 is laid on the outer protective plate 4, the inner protective plate 3 is laid on the middle of the flexible waterproof membrane 1, and the middle of the flexible waterproof membrane 1 is pressed against the outer protective plate 4.

[0052] The flexible waterproof membrane 1 is folded along the assembly crease t. The side protective plate 5 is connected to the frame 2. The side protective plate 5 presses the four sides of the flexible waterproof membrane 1 against the outside of the frame 2. The flexible waterproof membrane 1 is sandwiched between the side protective plate 5 and the frame 2, as well as between the inner protective plate 3 and the outer protective plate 4, forming a protective body p that can be laid flat and opened on all four sides. The protective body p can achieve reliable waterproofing, moisture prevention, and small animal intrusion prevention at a low cost without making any changes to the internal and external structure and assembly method of the ring main unit 8. It can ensure the safe operation of the equipment during the rainy season and typhoon season, greatly reduce the risk of power outages caused by urban water accumulation, significantly reduce power outage losses, and reduce disaster relief and repair costs.

[0053] The ring main unit protection method and device of the present invention have the following beneficial effects: A seamless flexible waterproof membrane is folded from all four sides to form assembly creases; a frame, inner protective plate, outer protective plate, and side protective plate are configured according to the dimensions of the assembly creases; the outer protective plate is assembled on the top of the ring main unit's cable trench; the flexible waterproof membrane is laid on the outer protective plate; the inner protective plate and frame are sequentially installed on the flexible waterproof membrane according to the assembly creases; the flexible waterproof membrane is folded again according to the assembly creases, covering the outside of the frame, and then the side protective plates are installed. The flexible waterproof membrane is sandwiched between the side protective plates and the frame, and between the inner and outer protective plates, forming a protective body that can be laid flat and opened from all four sides. This achieves waterproofing of the ring main unit at a lower cost without changing the outer casing structure, the installation method, or moving the cabinet; the structure is reasonable and easy to construct and install.

Claims

1. A method for protecting a ring main unit, characterized in that, The method comprises the following steps: folding the whole seamless flexible waterproof membrane to form assembly creases, arranging a frame, an inner protection plate, an outer protection plate and a side protection plate with sizes matching the assembly creases; assembling the outer protection plate on the top of the cable trench of the ring main unit, laying the flexible waterproof membrane on the outer protection plate, and sequentially assembling the inner protection plate and the frame on the flexible waterproof membrane according to the traces of the assembly creases; folding the flexible waterproof membrane again according to the assembly creases, assembling the side protection plate outside the frame after the flexible waterproof membrane is wrapped outside the frame, and clamping the flexible waterproof membrane between the side protection plate and the frame and between the inner protection plate and the outer protection plate to form a protection body which can be opened flat on four sides; opening the glue-filling sealing components for the cables of the ring main unit at the positions corresponding to the inner protection plate, the flexible waterproof membrane and the outer protection plate.

2. The ring main unit protection method according to claim 1, wherein Further comprising: the step of assembling hinges on the frame, the inner protection plate, the side protection plate and the outer protection plate.

3. The ring main unit protection method according to claim 1, wherein The step of forming the protection body which can be opened flat on four sides further comprises the step of assembling a ventilation and drainage component in the protection body.

4. The ring main unit protection method according to claim 1, wherein The step of opening the glue-filling sealing components for the cables of the ring main unit at the positions corresponding to the inner protection plate, the flexible waterproof membrane and the outer protection plate further comprises: the step of arranging a waterproof flange at the bottom of the protection body, and performing glue-filling sealing after the cables of the ring main unit pass through the waterproof flange.

5. A ring main unit protection device, characterized in that, Comprise: a flexible waterproof membrane which can be folded to form assembly creases, and a frame, an inner protection plate, an outer protection plate and a side protection plate with sizes matching the assembly creases; the outer protection plate is assembled on the top of the cable trench of the ring main unit, the flexible waterproof membrane is laid on the outer protection plate, and the inner protection plate is laid on the middle part of the flexible waterproof membrane, and the middle part of the flexible waterproof membrane is pressed against the outer protection plate; the flexible waterproof membrane is folded according to the assembly creases, the side protection plate is connected to the frame, the side protection plate presses the four peripheral ends of the flexible waterproof membrane against the outside of the frame, and the flexible waterproof membrane is clamped between the side protection plate and the frame and between the inner protection plate and the outer protection plate to form a protection body which can be opened flat on four sides.

6. The ring main unit protection device according to claim 5, wherein The flexible waterproof membrane is made by compounding PVC calendering film on both sides of a layer of high-strength polyester or chinlon through heating and pressing; the frame can be opened flat on four sides, and the frame is made of aluminum alloy material.

7. The ring main unit protection device according to claim 6, wherein Hinges are arranged between the frame and the inner protection plate, and between the side protection plate and the outer protection plate.

8. The ring main unit protection device according to claim 5, wherein A waterproof flange is arranged at the bottom of the protection body, and glue-filling sealing is performed after the cables of the ring main unit pass through the waterproof flange.

9. The ring main unit protection device according to claim 5, wherein A ventilation and drainage component is arranged in the protection body.

10. The ring main unit protection device according to claim 5, wherein The inner protection plate and the frame are rigidly connected with the outer wall of the ring main unit.

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