Totally-enclosed integrated isolator with fuse

Abstract

The utility model provides a totally-enclosed integrated isolator with a fuse, which comprises an insulating support fixedly connected with a base, an enclosed lightning arrester is integrated on the insulating support, and the enclosed lightning arrester is connected with the base and grounded; a power side static contact and a user side static contact are integrated on the insulating support, and the power side and the user side of the insulating support are both provided with insulating rapid crimping terminals connected with a circuit. The disconnecting link comprises a power side moving contact, a fuse and a user side moving contact, and the power side moving contact and the user side moving contact are connected through the fuse. Under the normal condition, the closed lightning arrester is connected to the branch line and does not work, and when overvoltage reaches the protection threshold value of the lightning arrester in the line fault, the closed lightning arrester is in non-linear conduction to protect electric appliances in the branch line. When a line has a grounding fault or overcurrent occurs, the fuse provides overcurrent protection, and a lower-level access electric appliance is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power equipment, specifically, relate to a full -enclosed integrated with fuse type isolator. BACKGROUND

[0002] The isolator has wide application, and the main purpose of the isolator is to ensure that the maintenance part in the electric power equipment is isolated from the live body, and the isolator is used for switching or pulling and closing the no-load circuit. With the upgrading of electric power equipment and the improvement of manufacturing process and operation level, a large number of maintenance-free electrical equipment are put into operation, so that the fault is greatly reduced, and the maintenance workload is also obviously reduced. However, the isolator in the prior art also has many defects.

[0003] The existing Chinese patent application document with the publication number CN211265328U discloses a full-enclosed quick-plug type anti-loose wiring high-voltage isolator device, which comprises a base part, a solid seal support part, a solid seal knife switch part, a quick-plug type full-insulation anti-loose plug connector and a cable; the solid seal support part is connected with the base part; the solid seal support part is arranged on the upper part of the base part; the solid seal knife switch part is connected with the solid seal support part; the quick-plug type full-insulation anti-loose plug connector comprises a moving contact assembly and a static contact assembly; the moving contact assembly is connected with the static contact assembly; the utility model realizes full sealing of the product by wrapping the knife switch live body with silicone rubber, and the moving contact on the knife switch and the static contact on the insulator are completely sealed in the resin insulator after closing.

[0004] The T-shaped switch electric appliance in the prior art comprises an isolator, a lightning arrester and an electric testing grounding device, and all are independent electric appliances, the access point is exposed to the atmosphere, there is no effective protection, the electric appliances of different manufacturers are different in shape, the installation standards are different, and the construction and maintenance are difficult, the wiring is complicated, and the wiring length is difficult to control. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model aims to provide a full-enclosed integrated fuse type isolator.

[0006] According to the full-enclosed integrated fuse type isolator, the moving contact on the knife switch and the static contact on the insulator are completely sealed in the resin insulator after closing.

[0007] The power supply side and the user side of the insulating support are both provided with an insulating quick pressure contact terminal of a connecting line;

[0008] One end of the knife switch is rotatably installed on the insulating support, and a closing locking connecting device is arranged between the other end of the knife switch and the insulating support, the knife switch comprises a power supply side movable contact, a fuse and a user side movable contact, and the fuse connects the power supply side movable contact and the user side movable contact;

[0009] The knife switch comprises a closing state and an opening state on the insulating support:

[0010] The closing state: the free end of the knife switch is connected with the insulating support, the power supply side movable contact is connected with the power supply side static contact, and the user side movable contact is connected with the user side static contact;

[0011] The opening state: the free end of the knife switch is separated from the insulating support, the power supply side movable contact is disconnected from the power supply side static contact, and the user side movable contact is disconnected from the user side static contact.

[0012] Preferably, the closed lightning arrester is connected with a disconnector through threads, the disconnector is connected with a base through a lightning arrester grounding insulating wire, and the base is grounded.

[0013] Preferably, the closed lightning arrester is arranged on the power supply side or the user side of the insulating support.

[0014] Preferably, the closing locking connecting device comprises a hook arranged on the movable end of the knife switch and a lock catch arranged on the insulating support, and the hook and the lock catch are connected through clamping.

[0015] Preferably, the movable end of the knife switch is further provided with a pull ring.

[0016] Preferably, the insulating quick pressure terminal comprises an insulating cover main shell and a cable sealing end cover.

[0017] The insulating cover main shell allows the cable of an external circuit to enter from an axial opening, the insulating cover main shell is provided with a fixing device for fixing the cable, the cable sealing end cover is sealingly installed at the axial opening of the insulating cover main shell, and the cable sealing end cover allows the cable to pass through.

[0018] Preferably, a mounting groove is formed in the side surface of the insulating cover main shell, the fixing device is arranged in the mounting groove, and an insulating cover sealing cover is sealingly connected at the opening of the mounting groove.

[0019] Preferably, the cable sealing end cover is sealingly connected with the cable through a cable sealing rubber sleeve.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1. The utility model discloses an integrated lightning arrester on the insulating support, under normal circumstances, the closed lightning arrester is not worked when being connected to branch circuit, when the overvoltage in the line fault reaches the protection threshold of lightning arrester, the closed lightning arrester is nonlinear conduction, and the electric appliance in branch circuit is protected.

[0022] 2. The utility model discloses a fuse in the knife switch, when the line ground fault or overcurrent occurs, the fuse provides overcurrent protection, effectively protects the lower access electric appliance.

[0023] 3. The utility model discloses the full insulation processing, embeds all live body in the insulating material, does not have any live bare point, realizes the totally enclosed protection. Solve the bare problem of live body in the atmosphere, can be used in the heavy pollution area, effectively prevent the corrosion problem caused by the foreign matter lapping, short circuit ground and acid rain, salt fog etc. caused by bad environment of ice and snow, rain, gale, birds and beasts. DRAWINGS

[0024] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-restrictive embodiments with reference to the following drawings:

[0025] Figure 1 For the utility model mainly embodies the whole structure diagram of fuse type isolator.

[0026] Signs:

[0027] Fuse 10 Insulating cover main casing 31

[0028] Pull ring 11 Insulating cover sealing cover 32

[0029] Hook 12 Cable sealing end cover 33

[0030] Power side moving contact 13 High-voltage insulated cable 40

[0031] User side moving contact 14 Cable sealing rubber sleeve 41

[0032] Rotary support 15 Closed lightning arrester 50

[0033] Lock catch 16 Disengager 51

[0034] Insulating support 20 Lightning arrester ground insulating wire 52

[0035] User side static contact 21 Base 60

[0036] Power side static contact 22 Electricity checking ground device 70

[0037] Quick pressure contact terminal 30 Electricity checking ground protection cover 72 DETAILED DESCRIPTION

[0038] The utility model will be explained in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of changes and improvements can be made. These all belong to the protection scope of the utility model.

[0039] As Figure 1 The utility model discloses a kind of full-closed integrated isolation device with fuse 10 type according to the utility model provides, including insulating support 20, knife switch and base 60, insulating support 20 is fixedly connected with base 60, insulating support 20 is integrated with closed lightning arrester 50, closed lightning arrester 50 is connected with base 60 and grounded. Insulating support 20 is integrated with power side static contact 22 and user side static contact 21, and the power side and user side of insulating support 20 are all configured with the insulating quick compression terminal 30 of connecting line.

[0040] One end of knife switch is rotatably installed on insulating support 20, and the other end of knife switch is provided with a closing lock connection device between insulating support 20, and the knife switch includes a power side moving contact 13, a fuse 10 and a user side moving contact 14, and the fuse 10 connects the power side moving contact 13 and the user side moving contact 14.

[0041] The knife switch includes a closing state and an opening state on the insulating support 20.

[0042] In the closing state, the free end of the knife switch is connected with the insulating support 20, the power side moving contact 13 is connected with the power side static contact 22, and the user side moving contact 14 is connected with the user side static contact 21. In the opening state, the free end of the knife switch is separated from the insulating support 20, the power side moving contact 13 is disconnected from the power side static contact 22, and the user side moving contact 14 is disconnected from the user side static contact 21.

[0043] The technical scheme of the present application integrates the knife switch with fuse 10, the quick compression terminal 30, the power side static contact 22, the user side static contact 21 and the fully-closed lightning arrester 50 on the insulating support 20, which can realize closing and opening operations, and can realize lightning protection for the isolator through the fully-closed lightning arrester 50, overcurrent protection for the lower-level connected electrical appliances through the fuse 10, without the need to reserve a connection point on the insulating support 20, with high overall insulation performance and simple wiring.

[0044] Specifically, the end of the knife switch near the user side is hinged to the insulating support 20. In a possible implementation, a rotating support 15 is provided on the insulating support 20, and the end of the knife switch is mounted on the rotating support 15 through a shaft and a bearing. The closing locking connection device includes a hook 12 provided on the movable end of the knife switch and a lock catch 16 provided on the insulating support 20, and the hook 12 and the lock catch 16 are clampedly connected. In order to facilitate the closing or opening of the knife switch by the staff with a special tool, the movable end of the knife switch is further provided with a pull ring 11.

[0045] More specifically, the insulating support 20 further integrates an electricity testing and grounding device 70, which includes an electricity testing and grounding rod and an electricity testing and grounding protective cover 72. The electricity testing and grounding rod is integrated on the insulating support 20, and one end of the electricity testing and grounding rod extends out of the insulating support 20. The electricity testing and grounding protective cover 72 is sleeved on the part of the electricity testing and grounding rod extending out of the insulating support 20, and the electricity testing and grounding protective cover 72 can move along the axial direction of the electricity testing and grounding rod, and the electricity testing and grounding protective cover 72 is provided with a magnetic type limiting device.

[0046] When the branch line or the branch line electrical appliance of the user side is overhauled, in order to ensure the safety of the overhaul personnel and provide obvious isolation break, the opening operation is needed. First, the ground operator pulls open the electricity testing and grounding protective cover 72 with a special tool, hangs a special grounding wire on the electricity testing and grounding rod, and then pulls the knife switch to realize the opening operation with a special tool. Further, in order to facilitate the special tool to pull open the electricity testing and grounding protective cover 72, a ring structure is provided on the electricity testing and grounding protective cover 72.

[0047] In a possible implementation, the magnetic type limiting device can be a magnet integrated in the electricity testing and grounding protective cover 72. The magnet can cooperate with the metal or magnet on the corresponding position of the insulating support 20 in the normal state to tightly close the electricity testing and grounding rod, and the magnetic attraction can be overcome by the staff with a special tool to ensure that the electricity testing and grounding protective cover 72 is pulled open to expose the electricity testing and grounding rod.

[0048] More specifically, the insulating support 20 is fixedly connected with the base 60. In a possible implementation, a middle part of the insulating support 20 extends an insulating column, and a bottom end of the insulating column is fixedly connected with the base 60. The closed lightning arrester 50 is threadedly connected with a disconnector 51, the disconnector 51 is connected with the base 60 through a lightning arrester grounding insulating wire 52, the base 60 is grounded, and the closed lightning arrester 50 is arranged on the power side or the user side of the insulating support 20. Further, the closed lightning arrester 50 can be configured to communicate with the line on the user side, or can be configured to communicate with the line on the power side. The closed lightning arrester 50 is threadedly connected with the disconnector 51, and the disconnector 51 is connected with the base 60 through the lightning arrester grounding insulating wire 52. The base 60 is provided with a mounting hole and a grounding bolt to realize grounding.

[0049] Further specifically, the high-voltage insulated cable 40 in the line is stripped of the outer insulation as required and is effectively connected to the quick compression terminal 30 of the insulated support 20. The insulated quick compression terminal 30 comprises an insulated cover main housing 31 and a cable sealing end cover 33, the insulated cover main housing 31 allowing the cable of the external line to enter from the axial opening, the insulated cover main housing 31 being provided with a fixing device for fixing the cable, and the cable sealing end cover 33 being sealingly installed at the axial opening of the insulated cover main housing 31 and allowing the cable to pass through. The side surface of the insulated cover main housing 31 is provided with a mounting groove in which the fixing device is arranged, and the opening of the mounting groove is sealingly connected with an insulated cover sealing cover 32. The cable sealing end cover 33 is sealingly connected with the cable through a cable sealing rubber sleeve 41.

[0050] All live parts of the application are embedded in insulating materials, without any live exposed points, achieving full protection. The fuse body of the fuse 10 is embedded in insulating materials; the pull ring 11, the hook 12, the rotary support 15, the lock catch 16, the insulated cover main housing 31, the insulated cover sealing cover 32, the cable sealing end cover 33, and the protection cover of the electricity testing grounding device 70 are all outdoor type anti-ultraviolet insulating materials.

[0051] The technical solution of the application is a fully-closed integrated isolator with a fuse 10, which is usually used as a switch when the overhead line is branched out. When closing, the ground operator usually drives the pull ring 11 on the knife switch with a special tool such as a Lijie stick, the knife switch rotates around the rotary support 15 by a certain angle, the power side movable contact 13 is connected with the power side static contact 22, the user side movable contact 14 is connected with the user side static contact 21, and when the hook 12 and the lock catch 16 are completely locked, the closing is realized. Under normal circumstances, the closed lightning arrester 50 is not working when connected to the branch line. When the overvoltage in the line fault reaches the protection threshold of the lightning arrester, the closed lightning arrester 50 becomes nonlinear conduction, protecting the electrical appliances in the branch line.

[0052] When the branch line or the electrical appliances in the branch line are being repaired, in order to ensure the safety of the repair personnel and provide a clear isolation break, the opening operation is required. First, the ground operator uses a special tool to pull open the protection cover of the electricity testing grounding device 70, and hangs a special grounding wire on the electricity testing grounding rod; then the pull ring 11 is pulled with a special tool, the hook 12 and the lock catch 16 are separated, the knife switch rotates around the rotary support 15 as the center, the power side movable contact 13 is separated from the power side static contact 22, the user side movable contact 14 is separated from the user side static contact 21, and when the knife switch rotates to the limit angle, the opening is completed.

[0053] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] The specific embodiments of the present application are described above. It needs to be understood that the present application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A totally enclosed, integrated isolator with a fuse, characterized by, The utility model provides an insulating support (20), knife switch and base (60), the insulating support (20) is fixedly connected with base (60), the insulating support (20) is integrated with closed lightning arrester (50), and the closed lightning arrester (50) is connected with base (60) and ground; The insulating support (20) is integrated with power side static contact (22) and user side static contact (21), and the power side and the user side of the insulating support (20) are provided with the insulating quick pressure contact terminal (30) of connecting line; One end of the knife switch is rotatably installed on the insulating support (20), and the other end of the knife switch is provided with a closing locking connecting device between the insulating support (20), and the knife switch comprises a power side moving contact (13), a fuse (10) and a user side moving contact (14), and the fuse (10) connects the power side moving contact (13) and the user side moving contact (14); The knife switch comprises a closing state and an opening state on the insulating support (20); The closing state: the free end of the knife switch is connected with the insulating support (20), the power side moving contact (13) is connected with the power side static contact (22), and the user side moving contact (14) is connected with the user side static contact (21); The opening state: the free end of the knife switch is separated from the insulating support (20), the power side moving contact (13) is disconnected with the power side static contact (22), and the user side moving contact (14) is disconnected with the user side static contact (21).

2. The totally enclosed integrated fuse-type isolator of claim 1, wherein, The closed lightning arrester (50) is connected with a disconnector (51) through threads, the disconnector (51) is connected with the base (60) through a lightning arrester grounding insulating wire (52), and the base (60) is grounded.

3. The totally enclosed integrated fuse-type isolator of claim 1, wherein, The closed lightning arrester (50) is arranged on the power side or the user side of the insulating support (20).

4. The totally enclosed integrated fuse-type isolator of claim 1, wherein, The closing locking connecting device comprises a hook (12) arranged on the movable end of the knife switch and a lock catch (16) arranged on the insulating support (20), and the hook (12) and the lock catch (16) are connected in a clamping mode.

5. The totally enclosed integrated fuse-type isolator of claim 1, wherein, The movable end of the knife switch is further provided with a pull ring (11).

6. The totally-enclosed, integrated fuse-type isolator of claim 1, wherein, The insulating quick pressure contact terminal (30) comprises an insulating cover main housing (31) and a cable sealing end cover (33). The insulating cover main housing (31) allows the cable of an external connecting line to enter from an axial opening, the insulating cover main housing (31) is provided with a fixing device for fixing the cable, the cable sealing end cover (33) is sealingly installed at the axial opening of the insulating cover main housing (31), and the cable sealing end cover (33) allows the cable to pass through.

7. The totally enclosed integrated fuse-type isolator of claim 6, wherein, A mounting groove is formed in the side surface of the insulating cover main housing (31), the fixing device is arranged in the mounting groove, and an insulating cover sealing cover (32) is sealingly connected to the opening of the mounting groove.

8. The totally enclosed integrated fuse-type isolator of claim 6, wherein, The cable sealing end cover (33) is sealingly connected with the cable through a cable sealing rubber sleeve (41).

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