An isolation protection device for transformer low-voltage end operation

Abstract

The application discloses an isolation protection device for transformer low-voltage end operation, which comprises a first insulation isolation protection component, a second insulation isolation protection component and a third insulation isolation protection component. The first insulation isolation protection component comprises a plurality of first hooks and a high-low voltage terminal post insulation isolation plate. The first hook comprises a first hook body, a first hook ear and a first clamping hole. A plurality of isolation columns are arranged in the first clamping hole to form a plurality of clamping grooves. The first hook is hooked on a wiring row through the first hook ear. The high-low voltage terminal post insulation isolation plate is held at the bottom of any clamping groove of the first clamping hole by hand, and the high-low voltage terminal post insulation isolation plate is vertically fixed. The isolation protection device for transformer low-voltage end operation can insulate and protect the high-voltage terminal posts during the live operation of the transformer low-voltage end, and eliminate the safety hazards. The structure is reasonable and easy to operate.

Description

Technical Field

[0001] This invention relates to the field of transformer operation auxiliary tools, and in particular to an isolation and protection device for low-voltage end operations of transformers. Background Technology

[0002] In existing technology, when replacing the transformer's low-voltage side voltage terminal to the JP cabinet's incoming line while the high-voltage line is energized, the entire transformer is live. Therefore, effective high-low voltage isolation is required during live-line work. Simultaneously, phase-to-phase isolation is also necessary when connecting the A, B, C, and N lines on the low-voltage side to prevent phase-to-phase loops. Furthermore, operators should avoid approaching the bottom terminals of the surge arresters during work to prevent accidental contact with the four surge arresters on the low-voltage side of the transformer.

[0003] Therefore, it is necessary to design appropriate isolation and protection devices for low-voltage operations of transformers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an isolation and protection device for low-voltage end operations of transformers, which can provide insulation and protection between high-voltage terminals during live operations at the low-voltage end of transformers, thereby eliminating safety hazards; the device has a reasonable structure and is easy to operate.

[0005] To address the aforementioned technical problems, this invention provides an isolation and protection device for low-voltage side operations of a transformer, comprising: a first insulating isolation and protection component for isolating the high-voltage and low-voltage terminals of the transformer; a second insulating isolation and protection component for isolating the grounding wire side of the low-voltage arrester of the transformer; and a third insulating isolation and protection component for isolating the phases of the low-voltage outgoing lines. The first insulating isolation and protection component includes: a plurality of first hooks and a high- and low-voltage terminal insulating isolation plate fixed by the plurality of first hooks. Each first hook includes: a first hook body, a first lug at one end of the first hook body for hooking the first hook onto a cable tray, and a first latch at the opposite end of the first hook body. The first latch has a plurality of isolation posts forming a plurality of slots. The first hook is hooked onto the cable tray by the first lug, and the high- and low-voltage terminal insulating isolation plate is held by hand and its bottom is locked into any slot of the first latch, thus vertically fixing the high- and low-voltage terminal insulating isolation plate. The inner side of the first lug has a plurality of evenly spaced toothed grooves, and the cross-section of the cable tray is I-shaped.

[0006] Among them, the structure of multiple first hooks is set to be the same.

[0007] The high and low voltage terminal insulating isolation plate is flat and has a first isolation handle on it.

[0008] The high and low voltage terminal insulating isolation plates and the first isolation handle are made of epoxy resin material.

[0009] The second insulation and isolation protection component includes: multiple second hooks and a surge arrester insulation isolation plate fixed by the multiple second hooks. The second hook includes: a second hook body, a second lug provided at one end of the second hook body for hooking the second hook onto the transformer platform grounding flat iron, and a second latch provided at the opposite end of the second hook body. The second latch is provided with multiple slots. The surge arrester insulation isolation plate is held by hand and one end is locked into any slot of the second latch to fix the surge arrester insulation isolation plate horizontally.

[0010] Among them, the structures of multiple second hooks are set to be the same.

[0011] The surge arrester insulating isolation plate is flat and has a second isolation handle. The surge arrester insulating isolation plate and the second isolation handle are made of epoxy resin material.

[0012] The third insulating and protective component is a clamp structure with an open end on one side, and its cross-section is U-shaped.

[0013] The opening end of the third insulation and isolation protection component is narrowed and has a certain degree of elasticity.

[0014] An isolation and protection device for low-voltage end operations of a transformer, as described in this invention, has the following beneficial effects: The first insulating isolation and protection component of the isolation and protection device for low-voltage end operations of a transformer includes: a plurality of first hooks and a high- and low-voltage terminal insulating isolation plate fixed by the plurality of first hooks. The first hook includes: a first hook body, a first lug provided at one end of the first hook body for hooking the first hook onto a cable tray, and a first latch provided at the opposite end of the first hook body. The first latch has a plurality of isolation posts to form a plurality of slots. The first hook is hooked onto the cable tray by the first lug, and the high- and low-voltage terminal insulating isolation plate is held by hand and its bottom is locked into any slot of the first latch, thus vertically fixing the high- and low-voltage terminal insulating isolation plate. This can isolate and protect the high-voltage terminal and the low-voltage terminal of the transformer, eliminating safety hazards; the structure is reasonable and easy to operate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a three-dimensional structural diagram of the first insulating isolation protection component of the isolation protection device for low-voltage end operation of a transformer according to an embodiment of the present invention.

[0017] Figure 2 This is a side view of the first insulating isolation and protection component of the isolation and protection device for low-voltage end operation of a transformer, according to an embodiment of the present invention.

[0018] Figure 3 This is a top view of the first insulating isolation and protection component of the isolation and protection device for low-voltage end operation of a transformer, according to an embodiment of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the second insulating isolation protection component of the isolation protection device for low-voltage end operation of a transformer according to an embodiment of the present invention.

[0020] Figure 5 This is a side view of the second insulating isolation protection component of the isolation protection device for low-voltage end operation of a transformer, according to an embodiment of the present invention.

[0021] Figure 6 This is a top view of the second insulating isolation protection component of the isolation protection device for low-voltage end operation of a transformer, according to an embodiment of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the third insulating isolation protection component of the isolation protection device for low-voltage end operation of a transformer, according to an embodiment of the present invention. Detailed Implementation

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

[0024] The isolation and protection device for low-voltage side operations of the transformer in this embodiment includes: a first insulation isolation and protection component for isolating the high-voltage terminal and the low-voltage terminal of the transformer, a second insulation isolation and protection component for isolating the grounding wire side of the low-voltage side surge arrester of the transformer, and a third insulation isolation and protection component 3 for isolating the low-voltage outgoing phases.

[0025] The first insulation and isolation protection component includes: a plurality of first hooks T1 and a high and low voltage terminal insulating isolation plate 12 fixed by the plurality of first hooks T1. The first hook T1 includes: a first hook body 111, a first hook lug 112 provided at one end of the first hook body 111 for hooking the first hook T1 onto the cable tray S, and a first bayonet 113 provided at the opposite end of the first hook body 111. The first bayonet 113 is provided with a plurality of isolation posts 1131 to form a plurality of slots 1132 in the first bayonet 113.

[0026] Specifically: the first hook T1 is hooked onto the cable tray S via the first lug 112; the bottom of the high-voltage and low-voltage terminal insulating isolation plate 12 is held in either slot 1132 of the first latch 113, thus vertically fixing the high-voltage and low-voltage terminal insulating isolation plate 12. This provides insulation and protection between the high-voltage and low-voltage terminals of the transformer.

[0027] See also Figures 1-3 This is the structure of the first insulating isolation protection component of the isolation protection device for low-voltage end operation of transformers according to the present invention.

[0028] In this embodiment, the multiple first hooks T1 are designed with the same structure and are all hooked to the cable tray S through the first hook ear 112. The cross-section of the cable tray S is I-shaped, and the inner side of the first hook ear 112 is provided with multiple equally spaced and uniformly arranged tooth grooves 1120. By setting the tooth grooves 1120, the connection between the first hook T1 and the cable tray S is strengthened.

[0029] The multiple isolation posts 1131 in the first bayonet 113 extend in the same direction as the first hook body 111, and the multiple isolation posts 1131 are arranged in a manner that increases or decreases in height from one side to the other, so as to quickly insert the high and low voltage terminal insulating isolation plate 12.

[0030] Furthermore, the high and low voltage terminal insulating isolation plate 12 is flat, and has two first isolation handles 121 on it. Both the high and low voltage terminal insulating isolation plate 12 and the first isolation handles 121 are made of epoxy resin material.

[0031] During implementation, the size of the high-voltage and low-voltage terminal insulating isolation plate 12 is determined according to the power of the transformer. For example, the length must be 20 cm longer than the high-voltage and low-voltage terminals on both sides, and the height must exceed the high-voltage side insulating porcelain insulator by 40 cm. By setting up the first insulating isolation protection component, a safe shielding range is formed, which can meet the safe distance requirements for high-voltage work. Holding the high-voltage and low-voltage terminal insulating isolation plate 12 and locking its bottom into any slot 1132 of the first latch 113, the high-voltage and low-voltage terminal insulating isolation plate 12 is vertically fixed, thus providing insulating isolation protection between the high-voltage terminal and the low-voltage terminal of the transformer. See also Figures 4-6 This is the structure of the second insulating isolation protection component of the isolation protection device for low-voltage end operation of transformers according to the present invention.

[0032] Furthermore, the second insulation and isolation protection component includes: a plurality of second hooks T2 and a surge arrester insulation isolation plate 22 fixed by the plurality of second hooks T2. The second hook T2 includes: a second hook body 211, a second lug 212 provided at one end of the second hook body 211 for hooking the second hook T2 onto the transformer platform grounding flat iron P, and a second bayonet 213 provided at the opposite end of the second hook body 211. The second bayonet is provided with a plurality of slots 2130, wherein: holding the surge arrester insulation isolation plate 22 and clamping one end of it into any slot 2130 of the second bayonet 213, the surge arrester insulation isolation plate 22 is horizontally fixed.

[0033] In this embodiment, the structures of the multiple second hooks T2 are the same, and they are all hooked to the transformer platform grounding flat iron P through the second hook ear 212. The transformer platform grounding flat iron P is in the shape of a flat strip.

[0034] Furthermore, the surge arrester insulating isolation plate 22 is flat and has a second isolation handle 222 on it. The surge arrester insulating isolation plate 22 and the second isolation handle 222 are made of epoxy resin material.

[0035] During implementation, hold the second isolation handle 222, align it with the slot 2130 of the second bayonet 213, and push the surge arrester insulation isolation plate 22 into the multiple second hooks T2 to complete the insulation isolation shielding of the surge arrester.

[0036] See Figure 7 This is the structure of the third insulating isolation protection component of the isolation protection device for low-voltage end operation of transformers according to the present invention.

[0037] In specific implementation, the third insulation isolation and protection component 3 is a clamp structure with an open end 31 on one side, and its cross-section is U-shaped. Its function is to serve as an insulation protective cover for phase-to-phase operation isolation and shielding.

[0038] The third insulating isolation protection component 3 is manufactured using a heat-bending one-piece molding method. The open end 31 is narrowed and has a certain degree of elasticity. Utilizing the material's resilience, a clamping force is generated, allowing the third insulating isolation protection component 3 to wrap around the low-voltage terminal block and maintain a certain clamping force. In this way, even if there is a collision during operation, it is not easy to fall off, ensuring the isolation effect.

[0039] In this embodiment, the isolation and protection device for low-voltage side operations of the transformer is implemented by using a first insulating isolation and protection component to isolate the high-voltage and low-voltage terminals of the transformer, a second insulating isolation and protection component to isolate the grounding wire side of the low-voltage arrester, and a third insulating isolation and protection component 3 to isolate the low-voltage outgoing phases. Temporary fixation is achieved through these isolation components. After the operation is completed, the insulating isolation plates 12 for the high and low voltage terminals and the insulating isolation plate 22 for the arrester are removed first, and then the corresponding hooks are removed.

[0040] The isolation and protection device for low-voltage end operations of transformers according to the present invention has the following beneficial effects: The first insulating isolation and protection component of the isolation and protection device for low-voltage end operations of transformers includes: a plurality of first hooks and a high- and low-voltage terminal insulating isolation plate fixed by the plurality of first hooks. The first hook includes: a first hook body, a first lug provided at one end of the first hook body for hooking the first hook onto the cable tray, and a first latch provided at the opposite end of the first hook body. The first latch is provided with a plurality of isolation posts to form a plurality of slots in the first latch. The first hook is hooked onto the cable tray by the first lug, and the high- and low-voltage terminal insulating isolation plate is held by hand and its bottom is locked into any slot of the first latch, thus vertically fixing the high- and low-voltage terminal insulating isolation plate. This can isolate and protect the high-voltage terminal and the low-voltage terminal of the transformer, eliminating safety hazards; the structure is reasonable and easy to operate.

Claims

1. An isolation and protection device for low-voltage end operations of a transformer, characterized in that, include: The first insulation isolation protection component is used to isolate the high-voltage terminal and the low-voltage terminal of the transformer; the second insulation isolation protection component is used to isolate the grounding wire side of the low-voltage side surge arrester of the transformer; and the third insulation isolation protection component is used to isolate the low-voltage outgoing phases. The first insulating and protective assembly includes: a plurality of first hooks and a high- and low-voltage terminal insulating isolation plate fixed by the plurality of first hooks. Each first hook includes: a first hook body, a first lug at one end of the first hook body for hooking the first hook onto a cable tray, and a first latch at the opposite end of the first hook body. The first latch has a plurality of isolation posts forming a plurality of slots, wherein: The first hook is hooked onto the cable tray by the first hanging ear, and the bottom of the high and low voltage terminal insulating isolation plate is held in any slot of the first bayonet to fix the high and low voltage terminal insulating isolation plate vertically. The inner side of the first loop is provided with multiple equally spaced and uniformly arranged toothed grooves, and the cross-section of the cable tray is I-shaped.

2. The isolation and protection device for low-voltage end operation of a transformer as described in claim 1, characterized in that, The structure of multiple first hooks is set to be the same.

3. The isolation and protection device for low-voltage end operation of a transformer as described in claim 1, characterized in that, The high and low voltage terminal insulating isolation plate is flat and has a first isolation handle on it.

4. The isolation and protection device for low-voltage end operation of a transformer as described in claim 3, characterized in that, The high and low voltage terminal insulating isolation plate and the first isolation handle are made of epoxy resin material.

5. The isolation and protection device for low-voltage end operation of a transformer as described in claim 1, characterized in that, The second insulation and isolation protection assembly includes: a plurality of second hooks and a surge arrester insulation isolation plate fixed by the plurality of second hooks. Each second hook includes: a second hook body, a second lug located at one end of the second hook body for hooking the second hook onto the transformer platform grounding flat iron, and a second latch located at the opposite end of the second hook body. The second latch has a plurality of slots, wherein: Hold the surge arrester insulating plate and clamp one end into any slot of the second bayonet to fix the surge arrester insulating plate horizontally.

6. The isolation and protection device for low-voltage end operation of a transformer as described in claim 5, characterized in that, The structures of the multiple second hooks are designed to be identical.

7. The isolation and protection device for low-voltage end operation of a transformer as described in claim 6, characterized in that, The surge arrester insulating isolation plate is flat and has a second isolation handle on it. The surge arrester insulating isolation plate and the second isolation handle are made of epoxy resin material.

8. The isolation and protection device for low-voltage end operation of a transformer as described in claim 1, characterized in that, The third insulating and protective component is a clamp structure with an open end on one side, and its cross-section is U-shaped.

9. The isolation and protection device for low-voltage end operation of a transformer as described in claim 8, characterized in that, The opening end of the third insulating and protective component is narrowed and has a certain degree of elasticity.

Images