GIS cable cabin for offshore wind turbine and GIS

Abstract

The utility model relates to a gas insulated switchgear, in particular to a GIS (gas insulated switchgear) cable cabin for an offshore wind turbine and a GIS. The GIS cable bin for the offshore wind turbine comprises a bin body and a bin door, a grounding switch is arranged in the bin body, a door lock mechanism is arranged between the bin body and the bin door, the door lock mechanism comprises an electromagnetic lock installed on the bin body and a lock catch installed on the bin door, the electromagnetic lock comprises a lock tongue used for locking the lock catch, and the lock tongue is connected with the electromagnetic lock. The electromagnetic lock is connected with the grounding switch and is connected with a primary current monitoring device, and when the grounding switch is closed and the primary current monitoring device monitors that the current is 0, the door lock mechanism is unlocked; and when the grounding switch is switched off or the primary current monitoring device monitors that the current is not zero, the door lock mechanism is locked. According to the utility model, the safety and reliability of a product during operation and maintenance are improved, the five-prevention requirement of an electric power system is perfected, and the personal and equipment safety of a power grid is ensured.

Description

Technical Field

[0001] The utility model relates to a gas-insulated switchgear, in particular to a GIS cable bin and a GIS for an offshore wind turbine. Background Art

[0002] GIS (Gas Insulated Metal Enclosed Switchgear) is a high-voltage electrical equipment, which provides a reliable basis for the safe and stable operation of the power system. GIS consists of a circuit breaker, a disconnector, an earthing switch, an outgoing terminal, etc. All these devices or components are completely enclosed in a grounded metal shell, and the inside is filled with a gas with excellent insulation performance and arc extinguishing performance. Compared with an open substation, it has many advantages such as compact structure, small floor area, good reliability, strong environmental adaptability, and small maintenance workload.

[0003] At present, the proportion of green energy in the entire energy structure has increased significantly. Among them, offshore wind power, as one of the important green energies, has developed rapidly, making the application of GIS in the field of offshore wind turbines more and more extensive.

[0004] GIS equipment is generally tightly connected to a cable through a connector. However, the installation environment of offshore GIS is different from that on land. The offshore environment is more severe, and the connector at the connection between GIS and the cable is more likely to be corroded or damaged by the external environment.

[0005] To solve this problem, the staff designed a cable bin at the connection between GIS and the cable, and placed the cable and the connector in the cable bin to isolate the corrosion or damage of the connector by the external environment. In addition, different from onshore GIS, the live devices such as the mutual inductor of offshore GIS also share a bin body with the cable bin. And the mutual inductor of offshore GIS requires the staff to periodically measure the values. When measuring, since there are live devices in the cable bin, safety accidents may occur when the staff opens the cable bin door due to the live condition inside the bin. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a GIS cable bin for an offshore wind turbine to solve the problem that safety accidents may occur due to the live condition inside the bin during the operation and maintenance of the staff.

[0007] At the same time, the utility model also aims to provide a GIS to solve the problem that safety accidents may occur due to the live condition inside the cable bin of GIS during the operation and maintenance of the staff.

[0008] To achieve the above purpose, a cable bin for GIS of the utility model adopts the following technical solutions:

[0009] A GIS cable bin for an offshore wind turbine, comprising a bin body and a bin door. An earthing switch is arranged inside the bin body. A door lock mechanism is arranged between the bin body and the bin door. The door lock mechanism includes an electromagnetic lock installed on the bin body and a lock catch installed on the bin door. The electromagnetic lock includes a lock tongue for locking the lock catch. The electromagnetic lock is connected to the earthing switch and is coupled with a primary current monitoring device. When the earthing switch is closed and the primary current monitoring device detects that the current is 0, the door lock mechanism is unlocked; when the earthing switch is opened or the primary current monitoring device detects that the current is not 0, the door lock mechanism is locked.

[0010] Beneficial effects: The GIS cable bin for an offshore wind turbine of the present utility model is an invention creation with element changes. The GIS cable bin for an offshore wind turbine of the present utility model is provided with an electromagnetic lock and a door lock mechanism with a lock catch between the cable bin body and the bin door. The electromagnetic lock is configured with a primary current monitoring device and is coupled with the earthing switch. The opening and closing of the electromagnetic lock are controlled by the states of the earthing switch and the primary current monitoring device, thereby realizing the electrical five-prevention function of the opening and closing of the bin door, improving the safety and reliability of the product during operation and maintenance, and ensuring the personal and equipment safety of the staff.

[0011] Furthermore, a semi-closed groove is formed on the lock catch, which can enable the lock catch to rotate and leave the lock tongue.

[0012] Furthermore, the lock tongue is of a cylindrical pin structure, and the width of the notch of the semi-closed groove is greater than the diameter of the lock tongue.

[0013] Furthermore, the lock catch is connected to a mechanical lock body. The mechanical lock body is of a rotary lock structure and has an output shaft capable of outputting a rotary motion. The lock catch is installed on the output shaft.

[0014] Furthermore, the bin door is a bin door that is opened by lifting upwards.

[0015] Furthermore, a horizontal hanging shaft is arranged on the bin body. An L-shaped card slot corresponding to the horizontal hanging shaft is arranged on the bin door. A stop head for stop cooperation with the outer edge of the L-shaped card slot is arranged at the end of the horizontal hanging shaft. The bin door is installed on the bin body through the cooperation of the horizontal hanging shaft and the L-shaped card slot.

[0016] Furthermore, the horizontal hanging shaft is composed of a bolt, and the stop head of the hanging shaft is composed of the bolt head of the bolt.

[0017] Furthermore, the electromagnetic lock is fixedly installed on the bin body through a lock bracket installed on the skeleton of the bin body.

[0018] Furthermore, vertically distributed modular holes are arranged on the skeleton of the bin body. The lock bracket is fixed on the skeleton of the bin body through the modular holes. The hole of the lock bracket cooperating with the modular holes is a vertically long hole.

[0019] The GIS of the present utility model adopts the following technical solutions:

[0020] A GIS includes a GIS cable bin for an offshore wind turbine. The GIS cable bin for an offshore wind turbine includes a bin body and a bin door. A door lock mechanism is provided between the bin body and the bin door. The door lock mechanism includes an electromagnetic lock installed on the bin body and a lock catch installed on the bin door. The electromagnetic lock includes a lock tongue for locking the lock catch. The electromagnetic lock is connected to an earthing switch and a primary current monitoring device. When the earthing switch is closed and the primary current monitoring device monitors that the current is 0, the door lock mechanism is unlocked; when the earthing switch is opened or the primary current monitoring device monitors that the current is not 0, the door lock mechanism is locked.

[0021] Beneficial effects: The GIS of the present utility model is an invention creation with element changes. In the GIS of the present utility model, an electromagnetic lock and a door lock mechanism with a lock catch are provided between the cable bin body and the bin door. The electromagnetic lock is connected in series with a primary current monitoring device and an earthing switch in the cable bin. The electrical five-prevention function of the opening and closing of the bin door is realized through the on-off cooperation of the earthing switch, the primary current monitoring device, and the electromagnetic lock, improving the safety and reliability of the product during operation and maintenance, and ensuring the safety of the staff, personal equipment.

[0022] Furthermore, a semi-closed groove is formed in the lock catch, which can enable the lock catch to rotate and leave the lock tongue.

[0023] Furthermore, the lock tongue is of a cylindrical pin structure, and the width of the notch of the semi-closed groove is greater than the diameter of the lock tongue.

[0024] Furthermore, the lock catch is connected to a mechanical lock body. The mechanical lock body is of a rotary lock structure and has an output shaft that can output rotary motion. The lock catch is installed on the output shaft.

[0025] Furthermore, the bin door is a bin door that is opened by lifting upwards.

[0026] Furthermore, a horizontal hanging shaft is provided on the bin body, an L-shaped card slot corresponding to the horizontal hanging shaft is provided on the bin door, and a stop head for stop cooperation with the outer edge of the L-shaped card slot is provided at the end of the horizontal hanging shaft. The bin door is installed on the bin body through the cooperation of the horizontal hanging shaft and the L-shaped card slot.

[0027] Furthermore, the horizontal hanging shaft is composed of a bolt, and the stop head of the horizontal hanging shaft is composed of the bolt head of the bolt.

[0028] Furthermore, the electromagnetic lock is fixedly installed on the bin body through a lock bracket installed on the skeleton of the bin body.

[0029] Furthermore, vertically distributed modular holes are provided on the skeleton of the bin body, and the lock support is fixed to the skeleton of the bin body through the modular holes. The hole of the lock support cooperating with the modular hole is a vertically long hole. Description of the Drawings

[0030] Figure 1 is a schematic structural view of the GIS cable bin for an offshore wind turbine of the present utility model;

[0031] Figure 2 is Figure 1 a partial enlarged view;

[0032] Figure 3 is a perspective view of the position of the door lock mechanism of the GIS cable bin for an offshore wind turbine of the present utility model;

[0033] Figure 4 is a front projection view of the inner side at the cable bin door of the GIS cable bin for an offshore wind turbine of the present utility model;

[0034] Figure 5 is Figure 4 a partial enlarged view;

[0035] Figure 6 is a schematic view of the cable bin door lifting structure of the GIS cable bin for an offshore wind turbine of the present utility model;

[0036] Figure 7 is a perspective view of the cable bin door lifting structure of the GIS cable bin for an offshore wind turbine of the present utility model;

[0037] Figure 8 is a control schematic diagram of the door lock mechanism.

[0038] In the figure: 101, cable bin door; 102, door lock mechanism; 103, lock catch; 104, electromagnetic lock; 105, lock tongue; 106, mechanical rotary lock; 107, horizontal hanging shaft; 108, L-shaped card slot; 109, stop; 110, lock support; 111, bin body skeleton. Detailed Embodiment

[0039] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] The specific embodiment of a GIS cable bin for an offshore wind turbine of the present utility model is as follows:

[0041] The connectors at the connection between the offshore GIS and the cable are more likely to be corroded or damaged by the external environment than those on land. To solve such problems, grid personnel specifically set up a cable compartment for the connectors at the connection between the GIS and the cable. In addition, the primary equipment of the offshore GIS and others share the same compartment body with the cable compartment, and the instrument transformers and others also share a compartment body with the cable compartment. Since the instrument transformers of the offshore GIS require grid personnel to periodically measure values, safety accidents may occur during operation and maintenance when the personnel open the compartment door and the inside of the compartment is electrified.

[0042] To solve the above problems, the present utility model designs a GIS cable compartment for an offshore wind turbine. The core concept of the device is to set up a door lock mechanism between the compartment body and the compartment door. The door lock mechanism includes an electromagnetic lock and a lock catch. The electromagnetic lock is configured with a primary current monitoring device and is connected to the earthing switch (the earthing switch on the cable compartment side of the GIS), that is, the state of the electromagnetic lock is linked with the opening and closing state of the earthing switch and the energized state of the primary equipment. Through the opening and closing of the earthing switch, the primary current monitoring device, and the electromagnetic lock, the electrical five-prevention function for the opening and closing of the cable compartment door is realized, avoiding the occurrence of safety accidents.

[0043] Based on the above invention concept, as Figure 1-8 shown in a specific embodiment, a GIS cable compartment for an offshore wind turbine is designed, which includes a compartment body, a compartment door 101, a door lock mechanism 102, a primary current monitoring device, and an earthing switch.

[0044] Specifically, when the earthing switch is closed and the primary current monitoring device monitors that the current is 0, the door lock mechanism 102 is unlocked; when the earthing switch is opened or the primary current monitoring device monitors that the current is not 0, the door lock mechanism 102 is locked.

[0045] As Figure 1 shown, the door lock mechanism 102 includes an electromagnetic lock 104 installed on the compartment body, a mechanical lock body installed on the compartment door, a lock catch 103, and a lock tongue 105 for locking the lock catch 103.

[0046] Specifically, the mechanical lock body is installed in the pre-drilled installation hole on the compartment door 101. The mechanical lock body is a rotary lock structure, and the rotary lock structure has an output shaft that can output rotational motion. The lock catch 103 is connected to the output shaft of the mechanical lock body. An electromagnetic lock 102 is installed with a lock tongue 105 for locking the lock catch 103. The lock catch 103 is provided with a semi-closed groove that can make the lock catch 103 rotate and leave the lock tongue 105. In this embodiment, the lock tongue is a cylindrical pin structure, and the semi-closed groove only needs to be larger than the diameter of the lock tongue. In this embodiment, the semi-closed groove is selected as a U-shaped groove, and in other embodiments, V-shaped grooves, straight grooves, and other groove body structures can also be selected.

[0047] Specifically, when the electromagnetic lock 104 is locked, the locking tongue 105 of the electromagnetic lock 104 extends, and the locking tongue 105 extends into the U-shaped groove of the lock catch 103 to lock the bin door 101. When the electromagnetic lock 104 is unlocked, the locking tongue 105 retracts, and the locking tongue 105 leaves the U-shaped groove of the lock catch 103, unlocking the bin door 101. When special maintenance is required, the operation and maintenance personnel rotate the key to drive the output shaft of the mechanical rotary lock 106 to rotate. The output shaft drives the lock catch 103 to rotate, and the lock catch 103 disengages from the locking tongue 105 by means of the U-shaped groove, unlocking the bin door 101.

[0048] As Figures 6-7 shown, the bin door 101 is an upward-opening bin door.

[0049] Specifically, a horizontal hanging shaft 107 is provided on the bin body 101, and a stop head 108 for stopping is provided at its end. In this embodiment, the horizontal hanging shaft 107 is composed of a bolt, and the stop head 108 is composed of the bolt head of the bolt. In other embodiments, the horizontal hanging shaft 107 and the stop head 108 can also adopt other mating structures with fixing and stopping functions such as studs and lock nuts. An L-shaped card slot 108 corresponding to the horizontal hanging shaft 107 is provided on the bin door 101. The bin door 101 is horizontally fixed on the bin body through the horizontal hanging shaft 107 on the bin body, and then the stop head 108 at the end of the horizontal hanging shaft 107 is used to stop the bin door 101 to prevent it from falling off.

[0050] As Figures 1-3 shown, the electromagnetic lock 104 is fixedly installed on the bin body through a lock bracket 110 installed on the bin body skeleton 111.

[0051] Specifically, the lock bracket 110 is U-shaped. One end of the U-shaped formed by the lock bracket 110 is used to install the electromagnetic lock 104, and a vertical long hole is provided at the other end for mating with the module holes vertically distributed on the bin body skeleton 111. Wing plates for installing the circuit of the electromagnetic lock 104 are provided at both vertical ends of the bin body skeleton 111. In this embodiment, the function of the module holes is to enable the electromagnetic lock 104 to be adjusted in height arbitrarily, facilitating the installation of the electromagnetic lock and the lock catch. In other embodiments, the lock bracket 110 can also be welded to the bin body skeleton 111.

[0052] The following introduces the electrical five-prevention function principle of the GIS cable bin for offshore wind turbines in combination with the above embodiments.

[0053] As Figure 8As shown in the figure, when the live monitoring device determines that the primary equipment is energized, it outputs a signal to the normally open contact connected to the coil of the electromagnetic lock, keeping it in the open state. The electrical five-prevention interlocking circuit cannot be connected, the electromagnetic lock 104 is in the closed state, and the grid personnel cannot unlock the electromagnetic lock 104. The electromagnetic lock tongue 105 locks the hatch 101 and cannot be opened. When the grounding switch is in the open state, the normally open contact connected to it (also connected in series in the coil power supply circuit) cannot be closed either, keeping the electromagnetic lock in the non-energized state and preventing the hatch from being opened.

[0054] When the live monitoring device determines that the primary equipment is de-energized, it outputs a closed contact. At this time, even if the corresponding contact is closed, since the contact connected to the grounding switch cannot be closed, the electromagnetic lock 104 is still in the de-energized state, and the grid personnel cannot unlock the electromagnetic lock 104. Only when both the grounding switch is closed and the primary equipment is de-energized can the electromagnetic lock be unlocked to realize the upward opening of the hatch.

[0055] When special maintenance is required, the live monitoring device determines that the primary equipment is energized and the electromagnetic lock 104 is in the closed state. A mechanical maintenance key can be inserted into the hatch 101 and rotated. The mechanical key drives the mechanical rotary lock 106, and the mechanical rotary lock 106 drives the lock catch 103 to disengage from the lock tongue 105 in the U-shaped groove, unlocking the hatch 101, and the hatch 101 can be lifted and opened.

[0056] The specific implementation manner of the GIS of the present utility model is as follows:

[0057] The innovation of the GIS of the present utility model lies in the adoption of the GIS cable hatch for offshore wind turbines of the present utility model. Other structures are all prior arts. The structure of the GIS cable hatch for offshore wind turbines can refer to the specific implementation manner of the above-mentioned GIS cable hatch for offshore wind turbines, which will not be elaborated here.

Claims

1. A GIS cable bin for an offshore wind turbine, comprising a bin body and a bin door, characterized in that, A grounding switch is arranged inside the bin body, and a door lock mechanism is arranged between the bin body and the bin door. The door lock mechanism includes an electromagnetic lock installed on the bin body and a lock catch installed on the bin door. The electromagnetic lock includes a lock tongue for locking the lock catch. The electromagnetic lock is connected to the grounding switch and is connected with a primary current monitoring device. When the grounding switch is closed and the primary current monitoring device monitors that the current is 0, the door lock mechanism is unlocked; when the grounding switch is opened or the primary current monitoring device monitors that the current is not 0, the door lock mechanism is locked.

2. The GIS cable bin for an offshore wind turbine according to claim 1, wherein, A semi-closed groove is formed in the lock catch, which can enable the lock catch to rotate and leave the lock tongue.

3. The GIS cable bin for an offshore wind turbine according to claim 2, wherein The lock tongue is of a cylindrical pin structure, and the width of the notch of the semi-closed groove is greater than the diameter of the lock tongue.

4. The GIS cable bin for an offshore wind turbine according to claim 3, wherein The lock catch is connected with a mechanical lock body. The mechanical lock body is of a rotary lock structure and has an output shaft capable of outputting a rotary motion. The lock catch is installed on the output shaft.

5. The GIS cable bin for an offshore wind turbine according to claim 1, wherein, The bin door is a bin door that is opened by lifting upwards.

6. The GIS cable bin for an offshore wind turbine according to claim 5, characterized in that, A horizontal hanging shaft is arranged on the bin body, an L-shaped slot corresponding to the horizontal hanging shaft is arranged on the bin door, and a stop head for stop cooperation with the outer edge of the L-shaped slot is arranged at the end of the horizontal hanging shaft. The bin door is installed on the bin body through the cooperation of the horizontal hanging shaft and the L-shaped slot.

7. The GIS cable bin for an offshore wind turbine according to claim 6, wherein The horizontal hanging shaft is composed of a bolt, and the stop head of the hanging shaft is composed of the bolt head of the bolt.

8. The GIS cable bin for an offshore wind turbine according to claim 1, wherein The electromagnetic lock is fixedly installed on the bin body through a lock bracket installed on the skeleton of the bin body.

9. The GIS cable bin for an offshore wind turbine according to claim 8, wherein, Vertically distributed modulus holes are arranged on the skeleton of the bin body. The lock bracket is fixed on the skeleton of the bin body through the modulus holes. The hole of the lock bracket cooperating with the modulus holes is a vertically long hole.

10. A GIS, including a GIS cable bin for an offshore wind turbine, characterized in that, The GIS is the GIS cable bin for an offshore wind turbine according to any one of claims 1-9.

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