Cable-disassembly-free ring main unit capable of checking phase and performing insulation test

Abstract

The utility model relates to the technical field of electrical equipment, in particular to a cable-disassembly-free ring main unit capable of checking phase and performing insulation test, which comprises a cabinet body, a mechanism chamber is arranged in the cabinet body, an electricity testing mechanism is arranged in the mechanism chamber, a switch is mounted on the electricity testing mechanism, an exposed operating mechanism is arranged on the electricity testing mechanism, and the operating mechanism is connected with the cable-disassembly-free ring main unit. The mechanism chamber is used for controlling operation of the switch, an exposed electricity testing interface is arranged in the mechanism chamber, the switch is electrically connected with the electricity testing interface, a cable is arranged in the mechanism chamber, and the switch is electrically connected with the cable; phase checking and insulation tests can be carried out by communicating the switch with the electricity testing interface, the operation is convenient, and the safety performance is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, and particularly relates to a ring main unit capable of performing phase verification and insulation test without disassembling the cable. Background Art

[0002] The high-voltage ring main unit is an important power distribution equipment in the power system, which is used to receive, distribute and control electric power. When installing and maintaining such equipment, it is crucial to ensure the safe operation of the line and equipment. Phase verification and insulation test are two important detection works for high-voltage ring main unit equipment during installation and maintenance. Since the ring main unit belongs to a fully insulated and fully sealed structure, and the incoming and outgoing lines of the equipment are all connected to the equipment by cables. If phase verification and insulation test are required, for the current traditional insulation test method, phase verification and cable insulation test usually need to be carried out under the condition of power outage and removing the cable head. However, the cable head is an important part of the cable, which connects the cable line and the equipment, and the sealing performance at the connection is the key. If the operation is improper, it may lead to safety accidents such as electric shock and short circuit. In terms of system stability, the cable head is a key node for power transmission and distribution, and any damage or improper modification may affect the stability and efficiency of the entire power system. In terms of cost, disassembling and reinstalling the cable head is a time-consuming and expensive process. In terms of safety, when disassembling the cable head for maintenance, the operator faces the risks of electric shock and other safety accidents.

[0003] A threaded type convenient and quick disassembly cable elbow head device with the publication number of CN117712919A discloses a device including a support component, including a fixed seat, a threaded groove arranged on the fixed seat, a threaded rod arranged on the threaded groove, a positioning shaft arranged at the lower end of the threaded rod, and an operation tube arranged on the threaded rod; an adjusting component, including a threaded component arranged on the fixed seat, a sliding component arranged on the threaded component, a deflection component arranged on the sliding component, a clamping component arranged on the deflection component, and a limiting component arranged on the clamping component; a positioning and connecting component, including a pressing component arranged on the limiting component, a pushing component arranged on the pressing component, and an adapting component arranged on the pressing component; what it discloses is a cable head that is convenient for disassembly and assembly, and it is still relatively troublesome for phase verification and insulation test. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that when performing operation and maintenance on a ring main unit that has been put into operation, the insulation and phase verification tests can be carried out on the ring main unit and the connected cable without disassembling the cable head.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] First, a ring main unit capable of phase checking and insulation testing without cable disassembly is provided, including a cabinet body. An equipment room is arranged inside the cabinet body. An electrification checking mechanism is arranged inside the equipment room. A switch is installed on the electrification checking mechanism. An exposed operating mechanism is arranged on the electrification checking mechanism for controlling the operation of the switch. An exposed electrification checking interface is arranged inside the equipment room. The switch is electrically connected to the electrification checking interface. A cable is arranged inside the equipment room. The switch is electrically connected to the cable. A cable is arranged inside the equipment room. The switch is electrically connected to the cable.

[0007] By controlling the operating mechanism to connect the switch with the electrification checking interface, phase checking and insulation testing can be carried out without removing the cable at this time. The operation is convenient and the safety performance is high.

[0008] Furthermore, the operating mechanism includes a first operating shaft, a second operating shaft, and an operating handle for controlling the rotation of the first operating shaft and the second operating shaft. Inserting the operating handle onto the operating shaft and rotating it can control the connection between the switch, the electrification checking interface, and the cable.

[0009] Furthermore, the switch includes a contact. The first operating shaft and the second operating shaft are connected to the contact. The first operating shaft is used to control the connection between the contact and the electrification checking interface. The second operating shaft makes the contact connected to the cable. By using two operating shafts to control the switch, it can be achieved without disassembling the ring main unit, which can greatly improve safety and eliminate potential safety hazards.

[0010] Furthermore, the operating handle includes a first operating head cooperating with the first operating shaft and a second operating head cooperating with the second operating shaft.

[0011] Furthermore, the protection mechanism includes an electrification checking small door. An electrification checking small door is rotatably installed at a position corresponding to the electrification checking interface on the outside of the equipment room. Using the electrification checking small door to protect the exposed electrification checking interface makes the device more convenient to use and has a higher safety performance.

[0012] Furthermore, the protection mechanism includes a cover plate. A cover plate is rotated at a position corresponding to the operating mechanism on the outside of the equipment room. Using the cover plate to protect the exposed operating shaft and prevent foreign objects from entering the operating shaft makes the device more reliable to use.

[0013] Furthermore, two electrification checking mechanisms are arranged inside the equipment room. Switches are installed on both of the two electrification checking mechanisms. A circuit breaker is arranged between the two switches. The switch is electrically connected to the circuit breaker.

[0014] Furthermore, the switch is electrically connected to the electrification checking interface and the cable through a copper bar. Using the copper bar can make the copper bar deform more conveniently, facilitate wire routing, and make the internal structure of the ring main unit more compact.

[0015] The utility model has the following beneficial effects: When performing phase verification and insulation test, the utility model only needs to operate the switch to open the voltage detection small door, without disassembling the ring main unit and cables, eliminating potential safety hazards, reducing labor costs, and being more convenient to use; and when controlling the operation of the switch, it only needs to open the cover plate, insert the operating handle and rotate it to achieve, which brings great convenience to the installation and maintenance of the power system on-site, and protects the exposed structure through the voltage detection small door and the cover plate, improving the safety performance of the device and making the device more reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0017] Figure 1 Schematic diagram of the cabinet body structure of this embodiment;

[0018] Figure 2 Schematic diagram of the mechanism chamber structure of this embodiment;

[0019] Figure 3 Rear view of the mechanism chamber of this embodiment;

[0020] Figure 4 Schematic diagram of the voltage detection mechanism of this embodiment;

[0021] Figure 5 Schematic diagram of the switch of this embodiment;

[0022] Figure 6 Schematic diagram of the installation of the voltage detection small door and the cover plate of this embodiment.

[0023] Figure 7 Schematic diagram of the structure of the operating handle of this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to better explain the present utility model for easy understanding, the following will make a detailed description of the present utility model through specific embodiments in conjunction with the drawings.

[0025] It should be noted that all the directional indications in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0026] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The present utility model provides a ring main unit that can perform phase verification and insulation test without cable disassembly, as Figure 1 、 Figure 2 and Figure 3 shown, which includes a cabinet body 1. A mechanism chamber 2 is arranged inside the cabinet body 1. Two symmetrically arranged voltage verification mechanisms 3 are installed in the mechanism chamber 2. A switch 4 is electrically connected to the voltage verification mechanism 3. A voltage verification interface 5 is installed outside the mechanism chamber 2, and the voltage verification interface 5 is exposed outside the cabinet body 1. The switch 4 is electrically connected to the voltage verification interface 5, and the switch 4 is also electrically connected to a cable 6. A circuit breaker 7 is also installed between the two voltage verification mechanisms 3, and the switch 4 is electrically connected to the circuit breaker 7. In this embodiment, electrical connection is achieved by using copper bars.

[0029] When phase verification and insulation test are required, only the control switch 4 needs to be connected to the voltage verification interface 5. At this time, it only needs to be connected to the voltage verification interface 5 outside the cabinet body 1. The operation is convenient, the cable 6 does not need to be removed, and no safety hazard will be caused during the use process. After the test is completed, the switch 4 can be connected to the cable 6 to make the ring main unit normally used.

[0030] As Figure 2 and Figure 4 shown, when the control switch 4 operates, a first operating shaft 31 and a second operating shaft 32 are arranged on the voltage verification mechanism 3. The first operating shaft 31 and the second operating shaft 32 are exposed outside the cabinet body 1, and the first operating shaft 31 and the second operating shaft 32 are connected to the switch 4. Operating the first operating shaft 31 can connect the switch 4 to the voltage verification interface 5, and operating the second operating shaft 32 can connect the switch 4 to the cable 6. Therefore, the switch 4 can be operated to work without opening the cabinet body 1 during the use process of this device.

[0031] Specifically, in this embodiment, as Figure 3 , Figure 5 and Figure 7 shown, a contact 41 is provided inside the switch 4. The contact 41 is connected to the first operating shaft 31 and the second operating shaft 32. Rotating the first operating shaft 31 and the second operating shaft 32 can drive the contact 41 to move, realizing connection of different contacts and alternately connecting the power verification interface 5 and the cable 6. During the process of operating the first operating shaft 31 and the second operating shaft 32, a matching operating handle 331 needs to be inserted into the operating shaft and rotated to move the contact 41. Specifically, the operating handle 331 includes a first operating head 34 that cooperates with the first operating shaft 31 and a second operating head 35 that cooperates with the second operating shaft 32.

[0032] As Figure 1 and Figure 6 shown, in order to make the device more safe and reliable, a power verification small door 51 is rotatably installed at the position on the outer side of the mechanism chamber 2 corresponding to the power verification interface 5, and covers 33 are rotatably installed at the positions corresponding to the first operating shaft 31 and the second operating shaft 32. The power verification small door 51 and the covers 33 are used to protect the structures exposed outside the cabinet body 1. During use, the power verification small door 51 and the covers 33 are opened, and then the first operating head 34 is inserted into the first operating shaft 31 and rotated. At this time, the power verification interface 5 is connected to the switch 4, and the phase comparison and insulation test can be carried out through the power verification interface 5. When the test is completed, the second operating head 35 is inserted into the second operating shaft 32, and at this time, the switch 4 can be connected to the cable, and the ring main unit can be used normally. Then, the power verification small door 51 and the covers 33 are closed. The use process of this device is simple, the operation is convenient, and the safety is higher.

[0033] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A ring main unit capable of performing insulation test on phases without disassembly of cables, characterized in that: The invention comprises a cabinet (1), wherein a mechanism chamber (2) is arranged in the cabinet (1), wherein an electric test mechanism (3) is arranged in the mechanism chamber (2), wherein a switch (4) is installed on the electric test mechanism (3), wherein an exposed operating mechanism is arranged on the electric test mechanism (3) for controlling the operation of the switch (4), wherein an exposed electric test interface (5) is arranged in the mechanism chamber (2), wherein the switch (4) is electrically connected to the electric test interface (5), wherein a cable (6) is arranged in the mechanism chamber (2), wherein the switch (4) is electrically connected to the cable (6), and wherein both the operating mechanism and the electric test interface (5) are provided with protection mechanisms.

2. The ring main unit for performing insulation test on cables without disassembly according to claim 1 is characterized in that: The operating mechanism comprises a first operating shaft (31) and a second operating shaft (32), and an operating handle (331) for controlling the rotation of the first operating shaft (31) and the second operating shaft (32).

3. The ring main unit for performing insulation test on the cable phases without disassembly according to claim 2 is characterized in that: The switch (4) comprises a contact (41), the first operating shaft (31) and the second operating shaft (32) being connected to the contact (41), the first operating shaft (31) being used to control the contact (41) to communicate with the electrical testing interface (5), and the second operating shaft (32) enabling the contact (41) to communicate with the cable (6).

4. The ring main unit for performing insulation test on the cable phases without disassembly according to claim 2 is characterized in that: The operating handle (331) comprises a first operating head (34) matched with the first operating shaft (31) and a second operating head (35) matched with the second operating shaft (32).

5. The ring main unit for performing insulation test on cables without disassembly according to claim 1 is characterized in that: The protection mechanism comprises a small electricity testing door (51), and the small electricity testing door (51) is rotatably mounted on the outer side of the mechanism chamber (2) at a position corresponding to the electricity testing interface (5).

6. The ring main unit for performing insulation test on cables without disassembly according to claim 1 is characterized in that: The protection mechanism comprises a cover plate (33), and a cover plate (33) is rotatably arranged at a position on the outside of the mechanism chamber (2) corresponding to the operating mechanism.

7. The ring main unit for performing insulation test on cables without disassembly according to claim 1 is characterized in that: Two electric testing mechanisms (3) are arranged in the mechanism room (2), switches (4) are installed on the two electric testing mechanisms (3), a circuit breaker (7) is arranged between the two switches (4), and the switch (4) is electrically connected to the circuit breaker (7).

8. The ring main unit for performing insulation test on the cable phases without disassembly according to claim 1 is characterized in that: The switch (4) is electrically connected to the electrical testing interface (5) and the cable (6) via a copper rod.

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