Device for testing breaking performance of arc chamber of load current fuse

Abstract

The application relates to the technical field of fuse testing, and discloses a device for testing the breaking performance of an arc-extinguishing chamber of a fuse under load, which comprises a test base, a movable power supply column is arranged on one side of the test base, a rotatable mounting seat is arranged above the test base, a clamping block is fixed on the mounting seat, a fuse main body is placed on the clamping block, an arc-extinguishing chamber is arranged in the fuse main body, arc-extinguishing filler and a fuse are arranged in the arc-extinguishing chamber, and wiring plugs are sleeved with both ends of the fuse main body; a movable pushing frame is arranged on the clamping block, and a movable abutting head is arranged above the test base. In the application, the corresponding wiring plug can be automatically separated from the discharge port of the fuse main body through the movable pushing frame, direct contact between relevant personnel and high-temperature arc-extinguishing filler during sampling can be avoided to prevent scalding, and the safety performance of sampling is improved.

Description

Technical Field

[0001] This invention relates to the field of fuse testing technology, specifically to a device for testing the breaking performance of the arc-extinguishing chamber of a fuse under load. Background Technology

[0002] A load-bearing fuse is a device that plays a critical protective role in a circuit. Its main function is to quickly cut off the current by melting the fuse itself when a short circuit or severe overload occurs, thereby protecting the circuit and equipment. The arc-extinguishing chamber is a key component used to quickly extinguish the electric arc and protect the circuit. The arc-extinguishing filler is filled inside the arc-extinguishing chamber and is used to extinguish the electric arc generated when the fuse melts. Its core function is to accelerate the cooling and ionization of the electric arc through physical and chemical actions, thereby quickly cutting off the circuit.

[0003] Abnormal current during breaking performance testing can cause the fuse in the arc-extinguishing chamber of the fuse to blow. The blowing process itself will trigger an electric arc. After the arc is generated, it will react with the arc-extinguishing filler. In order to test whether the arc-extinguishing mechanism of the fuse can play a normal arc-extinguishing role, the arc-extinguishing filler needs to be tested to determine whether it will fail after being affected by the electric arc. Currently, during the testing of the arc-extinguishing filler, it is necessary to take samples of the arc-extinguishing filler. Because the temperature is high when the arc is generated, the temperature of the arc-extinguishing filler itself may be too high. When sampling the arc-extinguishing filler, burns are likely to occur. Sampling after the arc-extinguishing filler has cooled down will affect the sampling efficiency and the accuracy of the test. Summary of the Invention

[0004] This invention provides a device for testing the breaking performance of the arc-extinguishing chamber of a loaded fuse. It automatically separates the corresponding terminal plug from the fuse body's discharge port via a pusher frame. During sampling, it avoids direct contact between personnel and the high-temperature arc-extinguishing filler, preventing burns and improving sampling safety. This invention solves the problems mentioned in the background art, such as the high temperature of the arc-extinguishing filler during arc generation leading to excessively high temperatures and potential burns during sampling, and the inefficiency and accuracy of sampling occurring after the filler has cooled down.

[0005] The present invention provides the following technical solution: a device for testing the breaking performance of the arc-extinguishing chamber of a load-bearing fuse, comprising a test base, a movable energizing post on one side of the test base, and a rotatable mounting base on the top of the test base, a locking block fixed on the mounting base, a fuse body placed on the locking block, an arc-extinguishing chamber inside the fuse body, an arc-extinguishing filler and a fuse respectively inside the arc-extinguishing chamber, and wiring plugs fitted at both ends of the fuse body;

[0006] The card block is equipped with a movable pusher, the test base is equipped with a movable abutment head, and the test base is equipped with a collection box.

[0007] The two ends of the fuse are electrically connected to the two terminal plugs. A first abutting rod is slidably connected to the mounting base. A first spring is connected between the first abutting rod and the mounting base. A first abutting wedge is fixed on the first abutting rod. A first rocker plate is abutted on the first abutting wedge. The first rocker plate is rotatably connected to the mounting base.

[0008] A guide rod is fixed on the push frame, and the guide rod is elastically connected to the locking block through a second spring. One end of the first rocker plate abuts against the push frame.

[0009] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse according to the present invention, wherein: a support base is fixed on the test base, a first servo motor is fixed on the support base, the motor shaft of the first servo motor is fixedly connected to the mounting base, and a limit block is fixed on the support base, and the mounting base abuts against the limit block.

[0010] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the load-bearing fuse according to the present invention, wherein: an electric push rod is fixed on the test base, the piston rod of the electric push rod is elastically connected to the contact head through a third spring, and the contact head is provided with a notch.

[0011] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse according to the present invention, wherein: a movable seat is fixed on one side of the test base, a second servo motor and a slide rail are respectively fixed on the movable seat, a movable block is slidably connected on the slide rail, a connecting rod is fixed on the movable block, the connecting rod is connected to one end of the energized column, a guide sleeve is fixed on the movable seat, the energized column is slidably connected to the guide sleeve, a deflection head is fixed on the motor shaft of the second servo motor, a strip rod is slidably connected on the deflection head, the strip rod is fixedly connected to the movable block, and a fourth spring is connected between the strip rod and the movable seat.

[0012] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse according to the present invention, wherein: a striking frame is slidably connected to the mounting base, a plurality of first arc-shaped abutment blocks are fixed on the striking frame, a second arc-shaped abutment block is fixed to one end of the first abutment rod, and a fifth spring is connected between the striking frame and the mounting base.

[0013] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse according to the present invention, wherein: a U-shaped plate is provided above the mounting base, a plurality of support rods are fixed on the U-shaped plate, an L-shaped abutment rod is fixed at the lower end of the U-shaped plate, the L-shaped abutment rod is elastically connected to the mounting base through a sixth spring, and the L-shaped abutment rod is slidably connected to the first abutment rod.

[0014] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the load-bearing fuse according to the present invention, wherein: a rectangular groove is provided at the bottom of the test base, a partition plate is provided in the rectangular groove, the partition plate is elastically connected to the test base by a seventh spring, and the upper end of the partition plate is slidably connected to the collection box.

[0015] As an optional embodiment of the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse according to the present invention, wherein: a third arc-shaped abutment block is fixed at one end of the mounting base, a second abutment rod is provided below the third arc-shaped abutment block, the second abutment rod is elastically connected to the test base through an eighth spring, the lower end of the second abutment rod abuts against a second rocker plate, the second rocker plate is rotatably connected to the test base, and one end of the second rocker plate abuts against the partition plate.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the device for testing the breaking performance of the arc-extinguishing chamber of the overloaded fuse, the arc-extinguishing filler in the arc-extinguishing chamber can be sealed by the wiring plug, and it can also be electrically connected to the fuse. The energized post can be inserted into the fuse body and connected to the connecting wire plug, so that the fault current can melt the fuse. The arc-extinguishing filler in the arc-extinguishing chamber can extinguish the arc generated by the fuse. The fuse body to be tested can be quickly snapped into the clip by the clip on the mounting base. The first servo motor on the support base can drive the mounting base to rotate, so that the sampling port of the fuse body after arc extinguishing is vertically downward and opposite to the collection box, which facilitates the collection of the arc-extinguishing filler during sampling.

[0018] The movable contact head can contact the first contact rod. With the cooperation of the first contact rod, the first contact wedge, the first rocker plate, and the guide rod, the push frame can automatically separate the corresponding wiring plug from the fuse body discharge port. During the sampling process, it can avoid the relevant personnel from direct contact with the high temperature arc extinguishing filler, which may cause burns and improve the safety performance of sampling.

[0019] 2. In the device for testing the breaking performance of the arc-extinguishing chamber of the load-bearing fuse, the fuse body can be struck during the process of feeding the arc-extinguishing filler by the striking frame set on the mounting base. This causes the arc-extinguishing filler, which has melted due to high temperature and adhered to the arc-extinguishing chamber, to fall off. On the one hand, this improves the feeding effect, reduces the residue of the arc-extinguishing filler in the fuse body during sampling, ensures the amount of sample taken, and improves the accuracy of the test. On the other hand, it speeds up the feeding process and improves the efficiency of sampling.

[0020] The U-shaped plate and several support rods work together to allow the wire plug separating from the sampling port of the fuse body to fall onto the U-shaped plate and the support rods, preventing the wire plug from falling into the collection box and affecting the sampling effect of the arc-extinguishing filler. The piston rod of the electric push rod can contact the L-shaped abutment rod fixed on the U-shaped plate, causing the L-shaped abutment rod to automatically push the U-shaped plate, thereby moving the wire plug away from the feeding port of the fuse body, improving the feeding accuracy, and preventing the arc-extinguishing filler from scattering onto the test base and affecting the sampling effect.

[0021] 3. In the device for testing the breaking performance of the arc-extinguishing chamber of the load-bearing fuse, the partition plate set in the rectangular groove can move on the collection box, which facilitates the sample dispensing during the arc-extinguishing filler feeding process and improves the convenience of sampling.

[0022] When the mounting base deflects, the third arc-shaped contact block of the mounting base abuts against the second contact rod, causing the second contact rod to automatically move downwards and abut against one end of the second rocker plate. This causes the second rocker plate to deflect automatically, and the other end of the second rocker plate can drive the separator plate to move vertically within the collection box. This achieves the purpose of automatically dispensing the arc-extinguishing filler into the collection box, saving time and effort, and providing convenience and speed. Attached Figure Description

[0023] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention.

[0024] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention.

[0025] Figure 3 This is one of the schematic diagrams of the test base structure of the present invention.

[0026] Figure 4 This is the second schematic diagram of the test base structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of the mounting base of the present invention.

[0028] Figure 6 This is a cross-sectional view of the main structure of the fuse of the present invention.

[0029] Figure 7 for Figure 6Enlarged view of point A in the middle.

[0030] In the diagram: 1. Test base; 2. Power-conducting post; 3. Mounting base; 4. Locking block; 5. Fuse body; 6. Arc-extinguishing chamber; 7. Arc-extinguishing filler; 8. Fuse; 9. Wiring plug; 10. Push frame; 11. Striking frame; 12. Contact head; 13. Collection box; 14. First contact rod; 15. First spring; 16. First contact wedge; 17. First rocker; 18. Guide rod; 19. Second spring; 20. Support base; 21. First servo motor; 22. Limit block; 23. Electric push rod; 24. Third spring; 25. Notch; 26. Movable seat; 27. Second servo motor; 28. Slide rail; 29. ​​Movable block; 30. Connecting rod; 31. Guide sleeve; 32. Deflector head; 33. Strip rod; 34. Fourth spring; 35. First arc-shaped abutment block; 36. Second arc-shaped abutment block; 37. Fifth spring; 38. U-shaped plate; 39. Support rod; 40. L-shaped abutment rod; 41. Sixth spring; 42. Rectangular groove; 43. Divider plate; 44. Seventh spring; 45. Third arc-shaped abutment block; 46. Second abutment rod; 47. Eighth spring; 48. Second rocker. Detailed Implementation

[0031] 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.

[0032] Example 1, please refer to Figures 1 to 7 A device for testing the breaking performance of the arc-extinguishing chamber of a fuse under load includes a test base 1, a movable energizing post 2 on one side of the test base 1, and a rotatable mounting base 3 on the top of the test base 1. A locking block 4 is fixed on the mounting base 3, and a fuse body 5 is placed on the locking block 4. An arc-extinguishing chamber 6 is provided inside the fuse body 5. An arc-extinguishing filler 7 and a fuse 8 are respectively provided inside the arc-extinguishing chamber 6. Wiring plugs 9 are respectively fitted at both ends of the fuse body 5.

[0033] The card block 4 is equipped with a movable pusher 10, the test base 1 is equipped with a movable abutment head 12, and the test base 1 is equipped with a collection box 13.

[0034] The two ends of the fuse 8 are electrically connected to two terminal plugs 9. A first abutting rod 14 is slidably connected to the mounting base 3. A first spring 15 is connected between the first abutting rod 14 and the mounting base 3. A first abutting wedge 16 is fixed on the first abutting rod 14. A first rocker plate 17 is abutted on the first abutting wedge 16. The first rocker plate 17 is rotatably connected to the mounting base 3.

[0035] A guide rod 18 is fixed on the push frame 10. The guide rod 18 is elastically connected to the locking block 4 through the second spring 19. One end of the first rocker plate 17 abuts against the push frame 10.

[0036] A support base 20 is fixed on the test base 1, and a first servo motor 21 is fixed on the support base 20. The motor shaft of the first servo motor 21 is fixedly connected to the mounting base 3, and a limit block 22 is fixed on the support base 20. The mounting base 3 rests against the limit block 22.

[0037] An electric push rod 23 is fixed on the test base 1. The piston rod of the electric push rod 23 is elastically connected to the contact head 12 through a third spring 24. The contact head 12 has a notch 25.

[0038] A movable seat 26 is fixed on one side of the test base 1. A second servo motor 27 and a slide rail 28 are fixed on the movable seat 26. A movable block 29 is slidably connected to the slide rail 28. A connecting rod 30 is fixed on the movable block 29. The connecting rod 30 is connected to one end of the energized post 2. A guide sleeve 31 is fixed on the movable seat 26. The energized post 2 is slidably connected to the guide sleeve 31. A deflection head 32 is fixed on the motor shaft of the second servo motor 27. A strip rod 33 is slidably connected to the deflection head 32. The strip rod 33 is fixedly connected to the movable block 29. A fourth spring 34 is connected between the strip rod 33 and the movable seat 26.

[0039] refer to Figures 1 to 7 When the fuse body 5 is tested for breaking performance, it first engages with two locking blocks 4 on the mounting base 3. One terminal plug 9 on the fuse body 5 is the input terminal, opposite to the energized post 2, and the other terminal plug 9 on the fuse body 5 is the output terminal, connected to the test lead. During the test, the energized post 2 is energized, and the second servo motor 27 fixed on the moving base 26 drives the deflection head 32 to rotate horizontally. The deflection head 32 is inserted into the groove of the strip rod 33. Since one end of the strip rod 33 is fixedly connected to the moving block 29, and the moving block 29 is slidably connected to the slide rail 28, the deflection head 32 rotates horizontally. During the rotation of the rotating head 32, the bar rod 33 can be moved, causing the moving block 29 to move the connecting rod 30 horizontally on the slide rail 28, so that the connecting rod 30 can drive the energized post 2 to be inserted into the wiring plug 9 at the input end of the fuse body 5. The fourth spring 34 stores force, and the test current then enters the fuse 8 in the arc-extinguishing chamber 6. The high-temperature arc generated by the fuse 8 melting comes into contact with the arc-extinguishing filler 7, thereby accelerating the cooling and extinguishing of the arc and completing the arc extinguishing process. Then the second servo motor 27 rotates, causing the energized post 2 to separate from the wiring plug 9 at the input end of the fuse body 5. The spring force is released by the fourth spring 34 to accelerate the separation speed.

[0040] When the arc-extinguishing filler 7 is sampled, the motor shaft of the first servo motor 21 on the support 20 drives the mounting base 3 to rotate, separating it from the limit block 22. This causes the fuse body 5 and the input terminal wiring plug 9 to be vertically downwards, so as to align with the collection box 13 on the test base 1. By adjusting the extension length of the piston rod of the electric push rod 23, the contact head 12 is driven to move horizontally, so that the contact head 12 abuts against the first contact rod 14. The first contact rod 14 drives the first contact wedge 16 to slide within the mounting base 3. The first spring 15 stores force, and then the second... A contact wedge 16 abuts against the first rocker plate 17, causing the first rocker plate 17 to deflect on the mounting base 3. The upper end of the first rocker plate 17 abuts against the push frame 10, causing the guide rod 18 fixed on the push frame 10 to slide on the locking block 4. The second spring 19 stores force, and during the movement of the push frame 10, the wiring plug 9 at the input end of the fuse body 5 can be automatically separated from the fuse body 5, so that during the sampling process, the arc-extinguishing filler 7 inside the fuse body 5 can avoid relevant personnel from coming into contact with the high-temperature arc-extinguishing filler 7 and causing burns, thus improving the safety performance of sampling.

[0041] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 7 A striking frame 11 is slidably connected to the mounting base 3. Several first arc-shaped abutment blocks 35 are fixed on the striking frame 11. A second arc-shaped abutment block 36 is fixed to one end of the first abutment rod 14. A fifth spring 37 is connected between the striking frame 11 and the mounting base 3.

[0042] A U-shaped plate 38 is provided above the mounting base 3. Several support rods 39 are fixed on the U-shaped plate 38. An L-shaped abutment rod 40 is fixed at the lower end of the U-shaped plate 38. The L-shaped abutment rod 40 is elastically connected to the mounting base 3 through a sixth spring 41, and the L-shaped abutment rod 40 is slidably connected to the first abutment rod 14.

[0043] refer to Figures 1 to 7 In order to improve the feeding efficiency of the arc-extinguishing filler 7 in the arc-extinguishing chamber 6 during the sampling process, the first contact rod 14 moves and drives the second arc-shaped contact block 36 to move synchronously. This enables the second arc-shaped contact block 36 to intermittently contact several equidistant first arc-shaped contact blocks 35, so that the striking frame 11 reciprocates on the mounting base 3, thereby continuously striking the surface of the fuse body 5. The fifth spring 37 continuously stores and releases its elastic force, so that the arc-extinguishing filler 7 that has melted and adhered to the arc-extinguishing chamber 6 due to high temperature can be shaken off. On the one hand, this improves the feeding effect, reduces the residue of the arc-extinguishing filler 7 in the fuse body 5, ensures the amount of sampling, and improves the accuracy of detection. On the other hand, it speeds up the feeding speed and improves the sampling efficiency.

[0044] After the pusher 10 automatically separates the wiring plug 9 from the fuse body 5, the wiring plug 9 falls onto the U-shaped plate 38 and several support rods 39. At this time, it will obstruct the discharge of the arc-extinguishing filler 7, causing the arc-extinguishing filler 7 to fail to fall into the collection box 13, affecting the sampling efficiency. By readjusting the extension length of the piston rod of the electric pusher 23, the notch 25 of the contact head 12 fits onto the second contact rod 46. When one end of the contact head 12 abuts against the second contact rod 46, the movement position of the contact head 12 can be restricted, so that... The piston rod of the electric push rod 23 continues to slide on the contact head 12. The third spring 24 stores force, which facilitates the piston rod of the electric push rod 23 to push the L-shaped contact rod 40 to move horizontally on the mounting base 3. The sixth spring 41 stores force, which causes the L-shaped contact rod 40 to drive the U-shaped plate 38 and several support rods 39 to move horizontally, automatically moving the separated wiring plug 9 to one side of the fuse body 5 feeding port, improving the feeding accuracy and preventing the arc-extinguishing filler 7 from falling onto the test base 1, which would further affect the sampling effect.

[0045] The contact head 12 has a notch 25 to prevent the L-shaped contact rod 40 from being obstructed when the mounting base 3 rotates.

[0046] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 7 The bottom of the test base 1 is provided with a rectangular groove 42, and a partition plate 43 is provided in the rectangular groove 42. The partition plate 43 is elastically connected to the test base 1 through a seventh spring 44, and the upper end of the partition plate 43 is slidably connected to the collection box 13.

[0047] A third arc-shaped abutment block 45 is fixed at one end of the mounting base 3. A second abutment rod 46 is provided below the third arc-shaped abutment block 45. The second abutment rod 46 is elastically connected to the test base 1 through an eighth spring 47. The lower end of the second abutment rod 46 abuts against a second rocker plate 48. The second rocker plate 48 is rotatably connected to the test base 1, and one end of the second rocker plate 48 abuts against the partition plate 43.

[0048] refer to Figures 4 to 6 To facilitate the sampling of the arc-extinguishing filler 7 for comparison during testing, the samples in the collection box 13 need to be dispensed. When the mounting base 3 deflects, the third arc-shaped contact block 45 of the mounting base 3 contacts the upper end of the second contact rod 46, causing the second contact rod 46 to slide on the test base 1. The eighth spring 47 stores force, and the lower end of the second contact rod 46 abuts against one end of the second rocker plate 48, causing the second rocker plate 48 to deflect, thereby driving the partition plate 43 to move vertically and automatically rise in the collection box 13. The seventh spring 44 stores force, and the arc-extinguishing filler 7 can be automatically dispensed in the collection box 13 during the feeding process without manual operation, saving time and effort, and avoiding burn accidents.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for testing the breaking performance of the arc-extinguishing chamber of a loaded fuse, comprising a test base (1), characterized in that: The test base (1) has a movable power post (2) on one side and a rotatable mounting base (3) on the top of the test base (1). A locking block (4) is fixed on the mounting base (3), and a fuse body (5) is placed on the locking block (4). An arc-extinguishing chamber (6) is provided inside the fuse body (5). An arc-extinguishing filler (7) and a fuse (8) are respectively provided inside the arc-extinguishing chamber (6). Wiring plugs (9) are respectively fitted at both ends of the fuse body (5). The card block (4) is provided with a movable pusher (10), the test base (1) is provided with a movable contact head (12), and the test base (1) is provided with a collection box (13). The two ends of the fuse (8) are electrically connected to the two wiring plugs (9). A first abutment rod (14) is slidably connected to the mounting base (3). A first spring (15) is connected between the first abutment rod (14) and the mounting base (3). A first abutment wedge (16) is fixed on the first abutment rod (14). A first rocker plate (17) abuts on the first abutment wedge (16). The first rocker plate (17) is rotatably connected to the mounting base (3). A guide rod (18) is fixed on the push frame (10). The guide rod (18) is elastically connected to the locking block (4) through a second spring (19). One end of the first rocker (17) abuts against the push frame (10).

2. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: The test base (1) is fixed with a support seat (20), and a first servo motor (21) is fixed on the support seat (20). The motor shaft of the first servo motor (21) is fixedly connected to the mounting seat (3), and a limit block (22) is fixed on the support seat (20). The mounting seat (3) abuts against the limit block (22).

3. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: An electric push rod (23) is fixed on the test base (1). The piston rod of the electric push rod (23) is elastically connected to the contact head (12) through a third spring (24). The contact head (12) has a notch (25).

4. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: A movable seat (26) is fixed on one side of the test base (1). A second servo motor (27) and a slide rail (28) are fixed on the movable seat (26). A movable block (29) is slidably connected on the slide rail (28). A connecting rod (30) is fixed on the movable block (29). The connecting rod (30) is connected to one end of the energized column (2). A guide sleeve (31) is fixed on the movable seat (26). The energized column (2) is slidably connected on the guide sleeve (31). A deflection head (32) is fixed on the motor shaft of the second servo motor (27). A strip rod (33) is slidably connected on the deflection head (32). The strip rod (33) is fixedly connected to the movable block (29). A fourth spring (34) is connected between the strip rod (33) and the movable seat (26).

5. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: A striking frame (11) is slidably connected to the mounting base (3). Several first arc-shaped abutment blocks (35) are fixed on the striking frame (11) and are distributed at equal intervals. A second arc-shaped abutment block (36) is fixed at one end of the first abutment rod (14). A fifth spring (37) is connected between the striking frame (11) and the mounting base (3).

6. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: A U-shaped plate (38) is provided above the mounting base (3), and several support rods (39) are fixed on the U-shaped plate (38). An L-shaped abutment rod (40) is fixed at the lower end of the U-shaped plate (38). The L-shaped abutment rod (40) is elastically connected to the mounting base (3) through a sixth spring (41), and the L-shaped abutment rod (40) is slidably connected to the first abutment rod (14).

7. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 1, characterized in that: The bottom of the test base (1) is provided with a rectangular groove (42), and a partition plate (43) is provided in the rectangular groove (42). The partition plate (43) is elastically connected to the test base (1) through a seventh spring (44), and the upper end of the partition plate (43) is slidably connected to the collection box (13).

8. The apparatus for testing the breaking performance of a loaded fuse arc-extinguishing chamber according to claim 7, characterized in that: One end of the mounting base (3) is fixed with a third arc-shaped contact block (45). A second contact rod (46) is provided below the third arc-shaped contact block (45). The second contact rod (46) is elastically connected to the test base (1) through an eighth spring (47). The lower end of the second contact rod (46) abuts against a second rocker plate (48). The second rocker plate (48) is rotatably connected to the test base (1), and one end of the second rocker plate (48) abuts against the partition plate (43).

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