Combined fuse type disconnecting switch

Abstract

A combined fuse type disconnecting switch comprises a plurality of disconnecting switches, each disconnecting switch is provided with a shell, the shell is used for installing a fuse carrying handle, the two sides of an inner cavity of the shell are respectively provided with a wiring terminal, the wiring terminals are used for being electrically connected with a fuse link on the fuse carrying handle, and the side face of the shell is further provided with an installation frame. The mounting frame is arranged opposite to the other side of the hinged end of the fuse carrying handle, the mounting frame is used for mounting the microswitch, a first rotating part is further arranged on the side, facing the shell, of a feeler lever of the microswitch in the mounting frame, the first rotating part is used for triggering the feeler lever of the microswitch, and a second rotating part is further arranged on the shell on the same side of the mounting frame in a penetrating mode and used for triggering the feeler lever of the microswitch. The second rotating piece is used for being matched with the first rotating piece and the fuse link, when the power connection between the fuse link and the wiring terminal is disconnected, the fuse link triggers the second rotating piece, and the second rotating piece enables the first rotating piece to trigger the feeler lever of the microswitch. According to the utility model, the purpose of remote monitoring can be achieved, so that the use of the disconnecting switch is safer and more reasonable.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a combined fuse-type disconnecting switch. Background Technology

[0002] Fuse-type disconnect switches play a crucial role, integrating power isolation and short-circuit protection functions, and are widely used in numerous fields such as industry, construction, and transportation. With the continuous development of power systems, higher demands are being placed on the performance, safety, and reliability of electrical equipment. Traditional fuse-type disconnect switches are finding it increasingly difficult to meet these new requirements in some aspects, such as the need for improved installation and operation. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a combined fuse-type disconnect switch with high safety and remote monitoring of the fuse status.

[0004] The technical solution adopted by this utility model to solve its technical problem is a combined fuse-type disconnecting switch, including multiple disconnecting switches. Each disconnecting switch has a housing for mounting a fuse-carrying handle. Terminals are provided on both sides of the inner cavity of the housing for energizing the fuse element on the fuse-carrying handle. A mounting bracket is also mounted on the side of the housing, opposite to the hinge end of the fuse-carrying handle. The mounting bracket is used to mount a micro switch with its contact rod facing the housing. A first rotating member is also provided inside the mounting bracket on the side of the micro switch facing the housing. The first rotating member triggers the contact rod of the micro switch. A second rotating member is also mounted on the housing on the same side as the mounting bracket. The second rotating member cooperates with the first rotating member and the fuse element. When the energizing connection between the fuse element and the terminal is broken, the fuse element triggers the second rotating member, which in turn causes the first rotating member to trigger the contact rod of the micro switch, thereby controlling the internal circuit of the micro switch.

[0005] The advantages of the above technical solution are as follows: Under normal use, the terminals on both sides are electrically connected through the fuse. The second rotating component does not act on the first rotating component, and the first rotating component does not act on the contact rod of the micro switch. The contact rod does not cause any change in the internal circuit of the micro switch. At this time, the output signal of the micro switch mounted on the mounting bracket will not change. When the fuse is disconnected from the terminals on both sides, the fuse causes the second rotating component to rotate and drives the first rotating component to rotate. After the first rotating component rotates, it presses against the contact rod of the micro switch. When the second rotating component and the first rotating component rotate to their positions, the contact rod of the micro switch is activated, thereby changing the internal circuit of the micro switch. The output signal of the micro switch mounted on the mounting bracket will then change, thus achieving the purpose of remote monitoring and making the use of the isolating switch safer and more reasonable.

[0006] Furthermore, the second rotating component is assembled from a first component and a second component. The first component is positioned on the lower side and has a protrusion, which is located on the rotation path of the fuse. The second component is positioned on the upper side and has an interlocking structure with the first component.

[0007] The advantages of the above technical solution are as follows: When the disconnecting switch is open, the fuse releases the restriction on the protrusion on the first component, and the second rotating component rotates in the direction of the first rotating component. After rotating to the correct position, the first rotating component can press against the contact rod of the micro switch. Conversely, when the disconnecting switch is closed, the fuse will press down on the first component through the protrusion, causing the second component to rotate in the opposite direction, thus ending the action on the first rotating component. Therefore, the contact rod of the micro switch will reset under the elastic action. Thus, the second rotating component with the above structure can realize remote monitoring of the opening and closing state, and the consistent opening and closing position is ensured by setting the interlocking structure.

[0008] Furthermore, the outer casing is provided with a first mounting groove on its side. The first mounting groove is arranged on the left and right sides of the wiring terminal and is a vertical structure that extends through the top. The two opposing first mounting grooves form a mounting for the insulating spacer.

[0009] The advantages of the above technical solution are as follows: by setting the first mounting groove on both sides of the outer casing relative to the wiring terminals, the first mounting groove allows the installation of an insulating spacer between adjacent casings, increasing the electrical clearance and creepage distance between two adjacent disconnect switches, thus avoiding safety accidents caused by short circuits. In addition, the first mounting groove is a vertical structure that runs through the top, making the installation and removal of the insulating spacer convenient.

[0010] Furthermore, a second mounting groove is provided on the side of the outer casing, and a corresponding fastening protrusion is provided on the inner wall of the mounting bracket, the fastening protrusion cooperating with the second mounting groove.

[0011] The advantages of the above technical solution are as follows: First, the two ends of the first rotating part are fitted together with the rotating holes at the corresponding positions of the mounting bracket. Then, the mounting bracket with the first rotating part is assembled with the outer shell. By engaging the fastening protrusion with the second mounting groove, the mounting bracket is securely connected to the outer shell, making it less likely to fall off. The installation is convenient and the structural design is reasonable.

[0012] Furthermore, a positioning notch is provided on the bottom wall of the mounting bracket, and a corresponding positioning protrusion is provided on the outer shell, the positioning protrusion cooperating with the positioning notch.

[0013] The advantages of adopting the above technical solution are: the positioning notch and positioning protrusion make the fit between the mounting bracket and the shell more stable and less prone to falling off.

[0014] Furthermore, the bottom of the melt-carrying handle is provided with a limiting block, and the limiting block is provided with a limiting through hole, which is used for the limiting component to pass through, so as to limit the position of the melt-carrying handle after it is opened.

[0015] The advantages of adopting the above technical solution are: after the fuse handle is opened, the limiting member can pass through the limiting hole to limit the position of the fuse handle, thereby preventing the fuse handle from being reset due to misoperation during maintenance, effectively avoiding the occurrence of mis-connection between the terminal and the fuse, and ensuring safety.

[0016] Furthermore, the bottom of the housing is provided with a guide rail slot, the rear end wall of the guide rail slot is recessed with a buckle groove, the front end wall of the guide rail slot is recessed with a sliding groove, the front end of the sliding groove is through, a sliding locking fastener is provided in the sliding groove that can slide back and forth, and the rear end of the sliding locking fastener is provided with a buckle protrusion.

[0017] The advantages of the above technical solution are: by moving the sliding locking fastener within the groove, it facilitates the engagement between the guide rail slot and the guide rail; at the same time, by setting the snap-fit ​​groove and snap-fit ​​protrusion, the connection with the guide rail is excellent, effectively fixing the disconnecting switch, and the structural design is reasonable.

[0018] Furthermore, the cross-section of the buckle protrusion is triangular, and the middle of the sliding locking fastener is recessed with a receiving groove extending along the length direction. An elastic element is provided inside the receiving groove, and a limiting block is also provided inside the sliding groove. The front end of the elastic element abuts against the limiting block.

[0019] The advantages of the above technical solution are as follows: when the sliding locking fastener is pulled to slide away from the guide rail slot, the elastic element deforms and accumulates elastic potential energy in the receiving groove under the action of the limiting block. After being released, the elastic element can be used to make the sliding locking fastener return to its original position and slide, so that the buckle protrusion forms a firm fixation to the guide rail. Moreover, compared with the locking pin and lock hole matching method, the sliding locking fastener is more convenient and reasonable to use, and the effect is better.

[0020] Furthermore, the inner walls on both sides of the slide groove are provided with limiting grooves, and the corresponding sides of the sliding locking fastener are provided with limiting protrusions, which slide and limit each other with the limiting grooves.

[0021] The advantages of the above technical solution are: by using the limiting grooves on both sides of the slide groove and the corresponding limiting protrusions on the sliding lock, the sliding lock and the slide groove can achieve the purpose of double-sided sliding limiting cooperation, and the sliding of the sliding lock is more stable. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0024] Figure 3 This is a partial structural diagram of the present invention. Figure 2 ;

[0025] Figure 4 This is a partial structural diagram of the present invention. Figure 3 ;

[0026] Figure 5 This is a partial structural diagram of the present invention. Figure 4 ;

[0027] Figure 6 This is a partial structural diagram of the present invention. Figure 5 ;

[0028] Figure 7 This is a partial structural diagram of the present invention. Figure 6 ;

[0029] Figure 8 This is a schematic diagram of the sliding locking fastener and elastic element mating structure of this utility model;

[0030] Figure 9 for Figure 3 A schematic diagram of the mating structure of the second rotating component.

[0031] In the diagram: 1-Disconnecting switch, 2-Housing, 3-Fuse holder handle, 4-Terminal, 5-Fuse element, 6-Mounting bracket, 7-Micro switch, 8-First rotating component, 9-Second rotating component, 10-Protrusion, 11-First mounting groove, 12-Insulating spacer, 13-Second mounting groove, 14-Snap-fit ​​protrusion, 15-Positioning notch, 16-Positioning protrusion, 17-Limiting block, 18-Limiting through hole, 19-Guide rail slot, 20-Snap-fit ​​groove, 21-Slide groove, 22-Sliding locking element, 23-Snap-fit ​​protrusion, 24-Receiving groove, 25-Elastic element, 26-Limiting stop, 27-Limiting groove, 28-Limiting protrusion, 29-Interlocking structure. Detailed Implementation

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0033] Please see Figures 1 to 8 As shown, a combined fuse-type disconnect switch includes multiple disconnect switches 1. Each disconnect switch 1 has a housing 2 for mounting a fuse-carrying handle 3. Terminals 4 are located on both sides of the inner cavity of the housing 2, and these terminals 4 are used to connect to the fuse element 5 on the fuse-carrying handle 3. More specifically, external power conductors are connected to two terminals 4 respectively. The fuse element 5 melts in the event of a short circuit or overcurrent, thus ensuring safety. A mounting bracket 6 is also mounted on the side of the housing 2, opposite to the hinged end of the fuse-carrying handle 3. That is, the mounting bracket 6 is located on the side where the fuse element 5 is mounted on the fuse-carrying handle 3. The mounting bracket 6 is used to mount a micro switch 7, and the contact rod of the micro switch 7... Facing the housing 2, a first rotating member 8 is provided inside the mounting bracket 6 on the side of the micro switch 7 facing the housing 2. The first rotating member 8 is used to trigger the contact rod of the micro switch 7. That is, when the first rotating member 8 is rotated towards the micro switch 7 under force, it will press against the contact rod of the micro switch 7, thereby changing the internal circuit of the micro switch 7. A second rotating member 9 is also installed on the housing 2 on the same side as the mounting bracket 6. The second rotating member 9 is used to cooperate with the first rotating member 8 and the fuse 5. When the energized connection between the fuse 5 and the terminal 4 is broken, the fuse 5 triggers the second rotating member 9. The second rotating member 9 causes the first rotating member 8 to trigger the contact rod of the micro switch 7 to control the internal circuit of the micro switch 7.

[0034] In the above structure, under normal use, the terminals 4 on both sides are electrically connected through the fuse 5. The second rotating member 9 does not act on the first rotating member 8, and the first rotating member 8 does not act on the contact rod of the micro switch 7. Even if it is pressed against the contact rod of the micro switch 7, it will not cause the contact rod to move. The contact rod will not cause any change in the internal circuit of the micro switch 7. At this time, the output signal of the micro switch 7 mounted on the mounting bracket 6 will not change. When the fuse 5 is disconnected from the terminals 4 on both sides, the fuse 5 causes the second rotating member 9 to rotate and drives the first rotating member 8 to rotate. After the first rotating member 8 rotates, it presses against the contact rod of the micro switch 7. When the second rotating member 9 and the first rotating member 8 are rotated to their positions, the contact rod of the micro switch 7 is activated, thereby changing the internal circuit of the micro switch 7. The output signal of the micro switch 7 mounted on the mounting bracket 6 will then change, thereby achieving the purpose of remote monitoring and making the use of the isolating switch safer and more reasonable.

[0035] In this example, the outer casing 2 is assembled from a cover shell and a base shell, and a mounting opening is formed in the middle of the upper surface of the outer casing 2. The ferroelectric handle 3 is engaged with the mounting opening by rotation. The micro switch 7 can be a normally open micro switch 7. Rotating columns are provided on both sides of the first rotating member 8, and rotating holes are provided at the corresponding positions of the mounting bracket 6. The first rotating member 8 is rotated and installed on the mounting bracket 6 by the cooperation of the rotating columns and rotating holes. A through part is formed at the corresponding position of the outer casing 2. The second rotating member 9 is also rotated and installed at the through part by the cooperation of the rotating columns and rotating holes.

[0036] In this example, remote monitoring can be implemented for both open and closed states. More specifically, when remote monitoring for both open and closed states is required, the second rotating component 9 is assembled from the first and second components. The first component is positioned at the lower side and has a protrusion 10 located on the rotation path of the fuse 5. The second component is positioned at the upper side and is connected to the first component in a synchronous rotational manner. In this structure, when the disconnect switch 1 is opened, the fuse 5 releases the restriction on the protrusion 10 on the first component, and the second rotating component 9 rotates towards the first rotating component 8. After rotating to the correct position, the second rotating component 9 can... A rotating component 8 forms a pressure against the contact rod of the micro switch 7. Conversely, when the isolating switch 1 is closed, the fuse 5 will press down on the first component through the protrusion 10, causing the second component to rotate in the opposite direction, thus ending the action on the first rotating component 8. Therefore, the contact rod of the micro switch 7 will reset under the elastic action. Thus, the second rotating component 9 with the above structure can realize remote monitoring of the opening and closing state. It should be noted that a tension spring is provided between the first component and the outer shell 2 at this time. The tension spring realizes the action of the second rotating component 9 rotating in the direction of the first rotating component 8 after the fuse handle 3 is opened.

[0037] In this embodiment, an engagement structure 29 is provided between the second component and the first component. By setting the engagement structure 29, the opening and closing angle of the second rotating component 9 remains consistent under the constraint of the tension spring. More specifically, the engagement structure 29 is configured as a notch and a protrusion that cooperate with each other. The notch is formed on the top of the first component, and the side wall of the notch is a first arc surface. The protrusion is formed on the bottom of the second component, and the surface of the protrusion that cooperates with the first arc surface is a second arc surface. At the same time, a connecting plate is also formed at the notch of the first component. The rotating column and the rotating hole are also formed on the connecting plate and the protrusion, respectively.

[0038] In this example, remote monitoring can also realize remote monitoring of the fuse signal. At this time, the second rotating part 9 is composed of only a single component, and the fuse body 5 adopts a structure in which the fuse core can be popped out. More specifically, the second rotating part 9 will drive the first rotating part 8 to rotate only after the fuse core pops out after melting. The second rotating part 9 with the above structure can realize remote monitoring of the fuse signal of the fuse body 5.

[0039] In this embodiment, a first mounting groove 11 is also provided on the side of the outer casing 2. The first mounting groove 11 is arranged on the left and right sides opposite to the wiring terminals 4 and is a vertical structure that extends through the top. That is to say, the left and right sides of the outer casing 2 are provided with the first mounting groove 11 at the corresponding positions of the two wiring terminals 4. The two opposing first mounting grooves 11 form the mounting of the insulating spacer 12. More specifically, since there are multiple disconnecting switches 1, after multiple disconnecting switches 1 are combined, the first mounting grooves 11 on the mating sides of two adjacent outer casings 2 will align, thereby realizing the mounting of the insulating spacer 12. In the above structure, by setting a first mounting groove 11 on both sides of the housing 2 relative to the terminal 4, the first mounting groove 11 allows the electrical clearance and creepage distance between two adjacent disconnect switches 1 to be increased by adding an insulating spacer 12 (690V or above) between adjacent housings 2, thus avoiding short circuits that could lead to safety accidents. Furthermore, the first mounting groove 11 is a vertical structure that extends through the top, allowing the insulating spacer 12 to be inserted vertically directly along the opening of the first mounting groove 11, making the installation and removal of the insulating spacer 12 convenient. The insulating spacer 12 can be made of flexible insulating material.

[0040] In this embodiment, a second mounting groove 13 is also provided on the side of the outer shell 2, and a corresponding fastening protrusion 14 is provided on the inner wall of the mounting bracket 6. The fastening protrusion 14 cooperates with the second mounting groove 13. In the above structure, the two ends of the first rotating member 8 are first installed through the rotating holes at the corresponding positions of the mounting bracket 6, and then the mounting bracket 6 with the first rotating member 8 is assembled with the outer shell 2. By fastening the fastening protrusion 14 with the second mounting groove 13, the mounting bracket 6 is fastened to the outer shell 2, which is not easy to fall off. The installation is convenient and the structural design is reasonable. It should be noted that there are three sets of fastening protrusions 14 and two mounting grooves 13, which are formed between the three inner walls of the mounting bracket 6 and the corresponding sides of the outer shell 2.

[0041] In this embodiment, a positioning notch 15 is provided on the bottom wall of the mounting bracket 6, and a positioning protrusion 16 is provided on the outer shell 2. The positioning protrusion 16 cooperates with the positioning notch 15. In the above structure, the positioning notch 15 and the positioning protrusion 16 make the cooperation between the mounting bracket 6 and the outer shell 2 more stable and less prone to falling off.

[0042] In this embodiment, a limiting block 17 is also provided at the bottom of the fusible link handle 3. The limiting block 17 is provided with a limiting through hole 18. The limiting through hole 18 is used for the limiting member to pass through, so as to limit the position of the fusible link handle 3 after it is opened. In the above structure, after the fusible link handle is opened, the limiting member can pass through the limiting through hole 18, so that the limiting member limits the position of the fusible link handle 3, thereby preventing the fusible link handle 3 from being reset due to misoperation during maintenance. This effectively avoids the phenomenon of mis-continuation between the terminal 4 and the fuse, and ensures safety. It should be noted that the limiting member can be a fixed rope or a long rigid member.

[0043] In this embodiment, the bottom of the outer casing 2 is also provided with a guide rail slot 19. The rear end wall of the guide rail slot 19 is recessed with a snap-fit ​​groove 20, and the front end wall of the guide rail slot 19 is recessed with a sliding groove 21. The front end of the sliding groove 21 is through-connected, and a sliding locking fastener 22 is provided in the sliding groove 21 that can slide back and forth. The rear end of the sliding locking fastener 22 is provided with a snap-fit ​​protrusion 23. In the above structure, by driving the sliding locking fastener 22 to move in the sliding groove 21, it is easier for the guide rail slot 19 to cooperate with the guide rail. At the same time, by setting the snap-fit ​​groove 20 and the snap-fit ​​protrusion 23, the connection effect with the guide rail is good, and the isolation switch 1 is effectively fixed. The structural design is reasonable.

[0044] In this embodiment, the cross-section of the buckle protrusion 23 is triangular, which provides good cooperation with the guide rail. The sliding locking fastener 22 has a recessed receiving groove 24 extending along its length in the middle. An elastic element 25 is provided inside the receiving groove 24. A limiting block 26 is also provided inside the sliding groove 21. The front end of the elastic element 25 abuts against the limiting block 26. It should be noted that a mounting post for installing the elastic element 25 is formed in the receiving groove 24. The elastic element 25 is a spring. The limiting block 26 is located relative to the receiving groove 24. The internal front end of the groove 24 is designed such that, in the above structure, when the sliding locking fastener 22 is pulled to slide away from the guide rail slot 19, under the action of the limiting block 26, the elastic element 25 deforms and accumulates elastic potential energy in the receiving groove 24. After being released, the elastic element 25 can be used to cause the sliding locking fastener 22 to return to its original position and slide, thereby making the buckle protrusion 23 firmly fixed to the guide rail. Compared with the locking pin and lock hole matching method, the sliding locking fastener 22 is more convenient and reasonable to use, and the effect is also better.

[0045] In this embodiment, limiting grooves 27 are provided on the inner walls of both sides of the slide groove 21, and limiting protrusions 28 are provided on the corresponding sides of the sliding locking fastener 22. The limiting protrusions 28 and the limiting grooves 27 are slidably limited and engaged. In the above structure, by using the limiting grooves 27 on both sides of the slide groove 21 and the corresponding limiting protrusions 28 on the sliding locking fastener 22 to engage, the sliding locking fastener 22 and the slide groove 21 can achieve the purpose of double-sided sliding limited engagement, and the sliding of the sliding locking fastener 22 is more stable.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A combined fuse-type disconnect switch, comprising multiple disconnect switches (1), each disconnect switch (1) having a housing (2), the housing (2) being used to mount a fuse holder (3), and terminals (4) being provided on both sides of the inner cavity of the housing (2), the terminals (4) being used to energize and connect to the fuse element (5) on the fuse holder (3), characterized in that: A mounting bracket (6) is also installed on the side of the housing (2). The mounting bracket (6) is located on the other side of the hinge end of the fusible handle (3). The mounting bracket (6) is used to install a micro switch (7) and to position the contact rod of the micro switch (7) towards the housing (2). A first rotating member (8) is also provided inside the mounting bracket (6) on the side of the micro switch (7) facing the housing (2). The first rotating member (8) is used to trigger the contact rod of the micro switch (7). A second rotating member (9) is also mounted on the outer casing (2) on the same side as the mounting bracket (6). The second rotating member (9) is used to cooperate with the first rotating member (8) and the fuse (5). When the fuse (5) is disconnected from the power connection of the terminal (4), the fuse (5) triggers the second rotating member (9). The second rotating member (9) causes the first rotating member (8) to trigger the contact rod of the micro switch (7) to control the internal circuit of the micro switch (7).

2. The combined fuse-type disconnector according to claim 1, characterized in that: The second rotating component (9) is assembled from the first component and the second component. The first component is arranged on the lower side and has a protrusion (10). The protrusion (10) is located on the rotation path of the fuse (5). The second component is arranged on the upper side and has an interlocking structure (29) between it and the first component.

3. The combined fuse-type disconnector according to claim 1, characterized in that: The outer casing (2) is also provided with a first mounting groove (11) on its side. The first mounting groove (11) is arranged on the left and right sides of the terminal block (4) and is a vertical structure that extends through the top. Two adjacent first mounting grooves (11) form a mounting for the insulating spacer (12).

4. A combined fuse-type disconnector according to claim 1, characterized in that: The outer casing (2) is also provided with a second mounting groove (13) on its side, and a fastening protrusion (14) is provided on the inner wall of the mounting bracket (6) respectively, and the fastening protrusion (14) cooperates with the second mounting groove (13).

5. A combined fuse-type disconnector according to claim 1 or 4, characterized in that: The mounting bracket (6) is provided with a positioning notch (15) on its bottom wall surface, and the outer shell (2) is provided with a corresponding positioning protrusion (16), which cooperates with the positioning notch (15).

6. A combined fuse-type disconnector according to claim 1, characterized in that: The bottom of the molten metal handle (3) is also provided with a limiting block (17), and the limiting block (17) is provided with a limiting through hole (18). The limiting through hole (18) is used for the limiting member to pass through, so as to limit the position of the molten metal handle (3) after it is opened.

7. A combined fuse-type disconnector according to claim 1, characterized in that: The bottom of the outer shell (2) is also provided with a guide rail slot (19). The rear end wall of the guide rail slot (19) is recessed with a buckle groove (20). The front end wall of the guide rail slot (19) is recessed with a sliding groove (21). The front end of the sliding groove (21) is through. A sliding locking fastener (22) is provided in the sliding groove (21) and can slide back and forth. The rear end of the sliding locking fastener (22) is provided with a buckle protrusion (23).

8. A combined fuse-type disconnector according to claim 7, characterized in that: The buckle protrusion (23) has a triangular cross-section. The sliding fastener (22) has a recessed receiving groove (24) extending along the length direction in the middle. The receiving groove (24) is provided with an elastic element (25). The sliding groove (21) is also provided with a limiting block (26). The front end of the elastic element (25) abuts against the limiting block (26).

9. A combined fuse-type disconnector according to claim 8, characterized in that: The inner walls of both sides of the slide groove (21) are provided with limiting grooves (27), and the corresponding sides of the sliding locking fastener (22) are provided with limiting protrusions (28). The limiting protrusions (28) and the limiting grooves (27) are slidably limited together.

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