High-voltage fuse wiring end cap and fuse employing same

Abstract

The invention relates to the technical field of switch contact operating mechanisms, and discloses a high-voltage fuse wiring end cap and a high-voltage fuse applying the same, the high-voltage fuse wiring end cap comprises a mounting part and a sealing cover rotatably mounted on the mounting part, the mounting part is provided with a mounting hole, and the sealing cover is provided with a closing station and an opening station; when the sealing cover is located at the sealing station, the sealing cover seals the mounting hole, and the conductive column on the sealing cover is connected with the fuse tube. When the sealing cover is in the opening station, the mounting hole is in an opening state; a locking buckle is installed on the installation part, and when the sealing cover is located at the sealing station, the sealing cover is fixed to the installation part through the locking buckle. According to the wiring end cap of the high-voltage fuse, the sealing cover is convenient to open and lock by rotating the sealing cover and the locking buckle structure which are mounted on the mounting part, so that the fuse tube is convenient to replace, and the working efficiency of replacing the fuse tube can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch contact operating mechanism, in particular to a high-voltage fuse terminal cap and a fuse applying the same. BACKGROUND

[0002] The existing fuse includes a terminal cap, a connecting piece, a ceramic tube and a fuse tube arranged in the ceramic tube. The fuse tube is arranged in the ceramic tube, the connecting piece is detachably installed on the ceramic tube, and the terminal cap is detachably installed on the connecting piece and electrically connected with the fuse tube. The existing terminal cap is connected with the terminal cap by means of a screw, which is relatively time-consuming in dismounting and mounting during replacement of the fuse tube. As disclosed in the Chinese patent with the patent application number CN71911058322.0 and the name of "outdoor 35kv voltage transformer high-voltage fuse terminal cap", the sheath is fixed on the sheath by means of a bolt, and the fuse tube needs to be taken out by opening the terminal cap during replacement of the fuse tube, which takes a long time. According to the statistics, the average time of the staff replacing the fuse is 74.6 minutes. SUMMARY

[0003] To solve the technical problems in the background art, the present application provides a high-voltage fuse terminal cap and a fuse applying the same.

[0004] The high-voltage fuse terminal cap provided by the present application comprises a mounting portion and a sealing cover rotatably mounted on the mounting portion, the mounting portion is provided with a mounting hole, and the sealing cover has a closed position and an open position.

[0005] When the sealing cover is in the closed position, the sealing cover closes the mounting hole, and a conductive column on the sealing cover is connected with the fuse tube.

[0006] When the sealing cover is in the open position, the mounting hole is in an open state.

[0007] The mounting portion is provided with a locking buckle, and when the sealing cover is in the closed position, the sealing cover is fixed on the mounting portion by the locking buckle.

[0008] Preferably, in order to facilitate connection with the connecting wire, the mounting portion is provided with a connecting piece connected with the connecting wire, which can be a terminal clamp in the prior art.

[0009] To ensure conductive connection between the sealing cap and the mounting part when the sealing cap is in the closed position, preferably, a conductive connector is installed on the inner end face of the mounting part. When the sealing cap is in the sealed position, the conductive post presses against the lower end of the conductive connector and connects the conductive post and the fuse tube, while the upper end of the conductive connector abuts against the mounting part. When the sealing cap is in the open position, the conductive connector can rotate relative to the mounting part so that the lower end of the conductive connector is located outside the fuse tube.

[0010] Preferably, the conductive connector includes an upper horizontal plate, a lower horizontal plate, and an inclined plate located between the upper and lower horizontal plates. The conductive connector can be integrally formed. The lower end of the mounting part is provided with a connecting post. The inclined plate has a movable hole. The connecting post passes through the movable hole, and the length of the movable hole is greater than the outer diameter of the connecting post. The conductive connector can move relative to the connecting post. When the sealing cover is in the open state, the conductive connector can be moved closer to the axis of the mounting part and the lower horizontal plate can be tilted upward to disengage the upper horizontal plate from the mounting part. Then, the conductive connector can be rotated to position it on one side of the fuse tube, which facilitates the replacement of the fuse tube.

[0011] Preferably, a limiting block is provided below the connecting post to prevent the conductive connector from detaching from the connecting post. The limiting block can be installed on the connecting post by means of threads or snap-fit.

[0012] To further ensure the conductive connection between the sealing cap and the mounting part when the sealing cap is in the closed position, preferably, the mounting part is provided with a conductive block, which has a portion that abuts against the sealing cap when the sealing cap is in the sealed position. This further ensures the conductive connection between the sealing cap and the mounting part while facilitating the installation of the connecting wire.

[0013] Preferably, the sealing cover includes a sealing disc and a first sealing rod and a second sealing rod disposed at the outer end of the sealing disc. The first sealing rod is laterally rotatably mounted on the mounting portion. The second sealing rod is opposite to the first sealing rod, and when the locking buckle locks the sealing cover, the locking buckle has a portion that sleeves outside the second sealing rod and abuts against the second sealing rod. The conductive block abuts against the first sealing rod. To ensure conductive connection between the sealing cover and the mounting portion, the locking buckle is made of conductive material.

[0014] Preferably, the conductive block is fixed on the mounting part, and the conductive block has a vertical limiting surface and a bottom contact surface. When the sealing cover is in the open position, the vertical limiting surface contacts one side of the sealing cover and limits the sealing cover. When the sealing cover is in the sealing position, the bottom contact surface abuts against the sealing cover.

[0015] Preferably, the bottom of the conductive block may be provided with a conductive spring, and the bottom of the conductive spring forms a bottom contact surface, thereby ensuring the tight contact and conductive connection between the conductive block and the sealing cover.

[0016] To ensure a tight seal, as a further optimization of the present invention, a sealing ring is provided on the side of the sealing cap opposite to the mounting portion. When the sealing cap closes the mounting hole, the sealing ring abuts against the end face of the mounting portion. The sealing ring can be a rubber structure from the prior art.

[0017] A high-voltage fuse includes a ceramic tube and a terminal cap as described above, mounted on the end of the ceramic tube, with the fuse tube located inside the ceramic tube.

[0018] As a further optimization of the present invention, both ends of the ceramic tube are provided with terminal caps. Depending on the actual application scenario, the fuse tube can be replaced by removing either terminal cap.

[0019] As a further optimization of the present invention, the ceramic tube has a limiting ring, and a retaining ring with an opening of less than 150° is fitted over the ceramic tube. The retaining ring is fitted over the ceramic tube through the opening. The retaining ring has a fixing extension, and the outer wall of the mounting part has a fixing protrusion. The fixing protrusion and the fixing extension are fixed by fasteners such as screws. When the retaining ring is fixed to the mounting part, the bottom of the retaining ring abuts against the bottom of the limiting ring. This ensures the stability of the connection between the mounting part and the ceramic tube.

[0020] In this invention, the high-voltage fuse terminal cap and the fuse in which it is applied are designed to facilitate the opening and locking of the sealing cover by rotating the sealing cover and locking buckle structure mounted on the mounting part, thereby facilitating the replacement of the fuse tube. Through experimental comparison, it was found that using the terminal cap of this application can reduce the time for replacing the fuse tube by more than 50%.

[0021] Furthermore, the fuse is mounted on the mounting part via a wiring component, which facilitates wiring connections between the fuse and the outside world. The conductive connection component and / or conductive block ensure the conductive connection between the sealing cover and the mounting part.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may become apparent by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the terminal cap structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the sealing cap of the present invention when it is in the open position;

[0025] Figure 3This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure when the conductive connector is located on one side of the fuse tube in Embodiment 2 of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0028] Figure 6 This is a magnified view of a portion of area A of the present invention;

[0029] Figure 7 This is a schematic diagram of the high-voltage fuse structure of the present invention;

[0030] In the diagram: 1. Mounting part; 10. Mounting hole; 15. Fixing protrusion; 2. Sealing cover; 20. Sealing disc; 21. First sealing rod; 22. Second sealing rod; 3. Locking buckle; 4. Sealing ring; 5. Conductive connector; 50. Upper horizontal plate; 51. Lower horizontal plate; 52. Inclined plate; 520. Movable hole; 6. Connecting post; 7. Limiting block; 8. Conductive block; 9. Vertical limiting surface; 11. Bottom contact surface; 12. Conductive spring; 13. Ceramic tube; 14. Snap ring; 140. Fixing extension; 16. Connecting shaft; 17. Conductive post; 19. Connector. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] Example 1

[0033] A high-voltage fuse terminal cap includes a mounting part 1 and a sealing cover 2 rotatably mounted on the mounting part 1. Specifically, the mounting part 1 has a protrusion with an installation opening. The sealing cover 2 is rotatably mounted on the installation opening of the mounting part 1 via a connecting shaft 16. The mounting part 1 has an installation hole 10. The sealing cover 2 has a closed position and an open position.

[0034] When the sealing cover 2 is in the closed position, the sealing cover 2 closes the mounting hole 10, and the conductive post 17 on the sealing cover 2 is connected to the fuse tube. The conductive post 17 can be a conductive component in the prior art or a conductive component with elastic function.

[0035] When the sealing cover 2 is in the open position, the mounting hole 10 is in the open state, which makes it easier to replace the fuse tube;

[0036] The mounting part 1 is equipped with a locking buckle 3. When the sealing cover 2 is in the closed position, the locking buckle 3 fixes the sealing cover 2 to the mounting part 1.

[0037] Specifically, the sealing cover 2 includes a sealing disc 20 and a first sealing rod 21 and a second sealing rod 22 disposed at the outer end of the sealing disc 20. The first sealing rod 21, the second sealing rod 22 and the sealing disc 20 can be integrally formed. The first sealing rod 21 is rotatably mounted on the mounting part 1. The second sealing rod 22 is opposite to the first sealing rod 21. When the locking buckle 3 locks the sealing cover 2, the locking buckle 3 has a part that is sleeved outside the second sealing rod 22 and abuts against the second sealing rod 22. The sealing disc 20 seals the mounting hole 10. In order to further ensure the locking buckle 3 locks the sealing cover 2, a limit groove is opened on the second sealing rod 22. When the locking buckle 3 locks the sealing cover 2, the locking ring of the locking buckle 3 is located in the limit groove.

[0038] Furthermore, both the connecting shaft 16 and the locking buckle 3 are made of conductive materials, thereby achieving a conductive connection between the sealing cover 2 and the mounting part 1.

[0039] To ensure a tight seal, preferably, a sealing ring 4 is provided on the side of the sealing cover 2 opposite to the mounting part 1. When the sealing cover 2 closes the mounting hole 10, the sealing ring 4 abuts against the end face of the mounting part 1, ensuring the sealing effect of the sealing cover 2 on the mounting hole 10. The sealing ring 4 can be made of existing rubber materials.

[0040] When the sealing cover 2 needs to be opened, external force is applied to the locking buckle 3, causing the locking buckle 3 to disengage from the second sealing rod 22, thus removing the locking of the sealing cover 2. Then, the sealing cover 2 is lifted upwards, causing it to rotate around the connecting shaft 16, thereby opening the mounting hole 10. When the sealing cover 2 needs to be closed, it is first rotated so that it is above the mounting hole 10. At this time, the sealing cover 2 is not in a completely horizontal state. Then, the second sealing rod 22 is pressed downwards and the sealing ring 4 is squeezed. The locking buckle 3 engages with the limiting groove of the second sealing rod 22, thereby locking the sealing cover 2. This facilitates the opening and closing of the sealing cover 2, thereby improving work efficiency.

[0041] Example 2

[0042] like Figures 3-4 As shown, in this embodiment, based on the above embodiment, in order to facilitate the connection with the connecting wire, preferably, a connector 19 for connecting the connecting wire is installed on the mounting part 1. The connector 19 can be a wire clamp in the prior art, which facilitates the connection of the fuse with the external connecting wire. Compared with the original wire clamp set on the sealing cover 2, this structure will not be affected by the connecting wire during the rotation of the sealing cover 2.

[0043] To ensure the conductive connection between the sealing cap 2 and the mounting part 1 when the sealing cap 2 is in the closed position, preferably, a conductive connector 5 is installed on the inner end face of the mounting part 1. When the sealing cap 2 is in the sealed position, the conductive post 17 presses against the lower end of the conductive connector 5 and connects the conductive post 17 to the fuse tube, while the upper end of the conductive connector 5 abuts against the mounting part 1. When the sealing cap 2 is in the open position, the conductive connector 5 can rotate relative to the mounting part 1 so that the lower end of the conductive connector 5 is located outside the fuse tube, thereby facilitating the installation and removal of the fuse tube.

[0044] Specifically, the conductive connector 5 includes an upper horizontal plate 50, a lower horizontal plate 51, and an inclined plate 52 located between the upper horizontal plate 50 and the lower horizontal plate 51. The conductive connector 5 can be integrally formed. When the sealing cover 2 is in the sealing position, the mounting part 1 of the upper horizontal plate 50 is pressed against the sealing cover, and the lower horizontal plate 51 is located between the conductive post 17 and the fuse tube, so that the fuse tube and the conductive post 17 are electrically connected.

[0045] The lower end of the mounting part 1 of the conductive connector 5 is provided with a connecting post 6. The connecting post 6 can be integrally formed with the mounting part 1. The inclined plate 52 has a movable hole 520. The connecting post 6 passes through the movable hole 520, and the length of the movable hole 520 is greater than the outer diameter of the connecting post 6. The conductive connector 5 can move relative to the connecting post 6. When the sealing cover 2 is in the open state, the conductive connector 5 can be moved closer to the axis of the mounting part 1 and the lower horizontal plate 51 can be tilted upward to disengage the upper horizontal plate 50 from the mounting part 1. Then, the conductive connector 5 can be rotated to position the conductive connector 5 on one side of the fuse tube, which facilitates the replacement of the fuse tube.

[0046] Preferably, a limiting block 7 is provided below the connecting post 6 to prevent the conductive connector 5 from detaching from the connecting post 6. The limiting block 7 can be installed on the connecting post 6 by means of thread or snap-fit. During the installation of the conductive connector 5, the limiting block 7 is first removed so that the connecting post 6 passes through the movable hole 520 on the inclined plate 52, and then the limiting block 7 is fixed to limit the conductive connector 5.

[0047] When disassembling the fuse tube, after opening the sealing cover 2, pull the lower horizontal plate 51 of the conductive connector 5 to move the conductive connector 5 closer to the axis of the mounting part 1. At the same time, pull the lower horizontal plate 51 upward to separate the upper horizontal plate 50 from the mounting part 1. Then rotate the conductive connector 5 so that the upper horizontal plate 50 is located on one side of the fuse tube, and then remove the fuse tube. When replacing the fuse tube, rotate the conductive connector 5 so that the lower horizontal plate 51 is located above the fuse tube. Then cover the sealing cover 2 downward so that the conductive post 17 presses the new lower horizontal plate 51 and realizes the conductive connection between the lower horizontal plate 51 and the conductive post 17 and the fuse tube. At the same time, the upper horizontal plate 50 is conductively connected to the mounting part 1. Moreover, this conductive connection structure is located inside the ceramic tube 13 of the fuse, so that its conductivity is more stable.

[0048] Preferably, in order to ensure the stability of the connection, the bottom of the lower horizontal plate 51 and the top of the upper horizontal plate 50 can be provided with elastic conductive elements, which can be conductive elastic sheets or springs.

[0049] Example 3

[0050] like Figure 5 - Figure 6 As shown, in this embodiment, based on any of the above embodiments, to further ensure the conductive connection between the sealing cap 2 and the mounting part 1 when the sealing cap 2 is in the closed position, preferably, the mounting part 1 is provided with a conductive block 8. When the sealing cap 2 is in the sealed position, the conductive block 8 has a portion that abuts against the sealing cap 2. This further ensures that the conductive connection between the sealing cap 2 and the mounting part 1 is guaranteed while facilitating the installation of the connecting wire.

[0051] Preferably, the sealing cover 2 includes a sealing disc 20 and a first sealing rod 21 and a second sealing rod 22 disposed at the outer end of the sealing disc 20. The first sealing rod 21 is laterally rotatably mounted on the mounting part 1. The second sealing rod 22 is opposite to the first sealing rod 21. When the locking buckle 3 locks the sealing cover 2, the locking buckle 3 has a portion that sleeves outside the second sealing rod 22 and abuts against the second sealing rod 22. The conductive block 8 abuts against the first sealing rod 21. To ensure the conductive connection between the sealing cover 2 and the mounting part 1, the locking buckle 3 is made of conductive material.

[0052] Preferably, the conductive block 8 is fixed on the mounting part 1. The conductive block 8 has a vertical limiting surface 9 and a bottom contact surface 11. When the sealing cover 2 is in the open position, the vertical limiting surface 9 contacts the surface of the first sealing rod 21 and limits the sealing cover 2. When the sealing cover 2 is in the sealing position, the bottom contact surface 11 abuts against the first sealing rod 21.

[0053] Preferably, the bottom of the conductive block 8 may be provided with a conductive spring piece 12. Specifically, the bottom of the conductive block 8 has an installation groove, and the end of the conductive spring piece 12 away from the sealing cover 2 is fixed in the installation groove. When the sealing cover 2 rotates, it squeezes the movable end of the conductive spring piece 12 and abuts against it, and the bottom of the conductive spring piece 12 forms a bottom contact surface 11, thereby ensuring that the conductive block 8 abuts against the first sealing rod 21 and conducts electricity.

[0054] like Figure 7 A high-voltage fuse is shown, comprising a ceramic tube 13 and a terminal cap as described above installed at the end of the ceramic tube 13, with the fuse tube located inside the ceramic tube 13.

[0055] Both ends of the ceramic tube 13 are equipped with terminal caps. The fuse tube can be replaced by removing either terminal cap according to the actual application scenario.

[0056] like Figure 7Preferably, the ceramic tube 13 has a limiting ring, and a retaining ring 14 with an opening is fitted over the ceramic tube 13. The opening of the retaining ring 14 is less than 150°. The retaining ring 14 is fitted over the ceramic tube 13 through the opening. The retaining ring 14 has a fixing extension 140. The outer wall of the mounting part 1 has a fixing protrusion 15. The fixing protrusion 15 and the fixing extension 140 are fixed by screws or other fasteners. When the retaining ring 14 is fixed to the mounting part 1, the bottom of the retaining ring 14 is pressed against the limiting ring. This ensures the stability of the connection between the mounting part 1 and the ceramic tube 13.

[0057] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-voltage fuse terminal cap, characterized in that, It includes a mounting part (1) and a sealing cover (2) rotatably mounted on the mounting part (1). The mounting part (1) has a mounting hole (10), and the sealing cover (2) has a closed position and an open position. When the sealing cover (2) is in the closed position, the sealing cover (2) closes the mounting hole (10), and the conductive post on the sealing cover (2) is connected to the fuse tube; When the sealing cover (2) is in the open position, the mounting hole (10) is in the open state; The mounting part (1) is equipped with a locking buckle (3). When the sealing cover (2) is in a closed position, the sealing cover (2) is fixed on the mounting part (1) by the locking buckle (3).

2. The high-voltage fuse terminal cap according to claim 1, characterized in that, The mounting part (1) is equipped with a connector (19) that is connected to the connecting line.

3. The high-voltage fuse terminal cap according to claim 2, characterized in that, A conductive connector (5) is installed on the inner end face of the mounting part (1). When the sealing cover (2) is in the sealing position, the conductive post (17) presses the lower end of the conductive connector (5) and connects the conductive post (17) and the fuse tube. At the same time, the upper end of the conductive connector (5) abuts against the mounting part (1). When the sealing cover (2) is in the opening position, the conductive connector (5) can rotate relative to the mounting part (1) so that the lower end of the conductive connector (5) is located outside the fuse tube.

4. The high-voltage fuse terminal cap according to claim 3, characterized in that, The conductive connector (5) includes an upper horizontal plate (50), a lower horizontal plate (51), and an inclined plate (52) located between the upper horizontal plate (50) and the lower horizontal plate (51). The lower end of the mounting part (1) is provided with a connecting post (6). The inclined plate (52) has a movable hole (520). The connecting post (6) passes through the movable hole (520), and the length of the movable hole (520) is greater than the outer diameter of the connecting post (6). The conductive connector (5) can move relative to the connecting post (6).

5. The high-voltage fuse terminal cap according to claim 4, characterized in that, A limiting block (7) is provided below the connecting post (6) to prevent the conductive connector (5) from detaching from the connecting post (6).

6. The high-voltage fuse terminal cap according to claim 2, characterized in that, The mounting part (1) is provided with a conductive block (8). When the sealing cover (2) is in the sealing position, the sealing cover (2) has a part that abuts against the conductive block (8).

7. The high-voltage fuse terminal cap according to claim 6, characterized in that, The conductive block (8) is fixed on the mounting part (1). The conductive block (8) has a vertical limiting surface (9) and a bottom contact surface (11). When the sealing cover (2) is in the open position, the vertical limiting surface (9) limits the sealing cover (2). When the sealing cover (2) is in the sealing position, the bottom contact surface (11) abuts against the sealing cover (2).

8. The high-voltage fuse terminal cap according to claim 1, characterized in that, The sealing cover (2) has a sealing ring (4) on the side opposite to the mounting part (1). When the sealing cover (2) closes the mounting hole (10), the sealing ring (4) abuts against the end face of the mounting part (1).

9. A fuse, characterized in that, It includes a ceramic tube (13) and a terminal cap as described in any one of claims 1-8 installed at the end of the ceramic tube (13), with the fuse tube located inside the ceramic tube (13).

10. The fuse according to claim 9, characterized in that, The mounting part (1) is mounted on the ceramic tube (13) by means of a retaining ring (14).

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