Electric power low-voltage circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, and particularly discloses an electric power low-voltage circuit breaker, which comprises a circuit breaker body, an insulating shell and a contact assembly, and is characterized in that the contact assembly is arranged on the inner side of the insulating shell and is used for opening and closing a contact; and the moving assembly is arranged on the outer side of the insulating shell, and the moving assembly is used for dislocation movement between the two contacts. Through the contact assembly, the moving contact can be gradually rotated to be closed with the static contact, so that the relative area between the moving contact and the static contact is gradually increased to a mutual contact position, and the moving contact can be quickly contacted and closed with the static contact to reduce the action of an electric arc, so that the influence on the service life of the contact is reduced; the static contact can move in a staggered mode relative to the moving contact, arcing substances attached to the surfaces of the static contact and the moving contact can be erased, and the influence of the arcing substances on the connection effect between the two contacts is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, in particular to a low-voltage power circuit breaker. Background Art

[0002] Low-voltage circuit breakers are important control and protection devices in electrical systems. They have control functions and multiple protection functions, including overload, short circuit, undervoltage and leakage protection. They can not only connect and disconnect normal load currents, but also handle overload currents and short-circuit currents. When the current in the circuit is abnormal, such as overload, short circuit or undervoltage, the low-voltage circuit breaker triggers the internal mechanism through electromagnetic force or thermal effect to separate the moving contact from the static contact, thereby cutting off the circuit.

[0003] During the closing process of a low-voltage circuit breaker, when the moving contact and the stationary contact are closed, an arc phenomenon may be generated between the moving contact and the stationary contact due to the effect of the electric field strength, causing the contact material to evaporate, thereby affecting the service life of the contact, and the arc-burning material generated may also adhere to the contact surface, thereby affecting the connection effect between the moving contact and the stationary contact. For this reason, we propose an electric low-voltage circuit breaker. Summary of the invention

[0004] The object of the present invention is to provide a low-voltage power circuit breaker to solve the problem raised in the above-mentioned background technology that during the closing process of the low-voltage circuit breaker, an arc may be generated between the moving contact and the stationary contact, thereby affecting the service life of the contact, and the arc-burning material generated may also adhere to the contact surface, thereby affecting the connection effect between the moving contact and the stationary contact.

[0005] To achieve the above object, the present invention provides the following technical solution: a low-voltage power circuit breaker, comprising: a circuit breaker body and an insulating shell,

[0006] It also includes: a contact assembly, which is arranged on the inner side of the insulating housing and is used for opening and closing the contacts;

[0007] The moving component is arranged on the outside of the insulating shell and is used for the misalignment movement between the two contacts.

[0008] Among them, the contact assembly includes a support rod symmetrically fixed on the upper end of the insulating shell, the upper end of the support rod is fixed to the circuit breaker body, a push rod is slidably arranged through the lower side of the insulating shell, a first bellows is fixed between the push rod and the insulating shell, a connecting seat is fixed in the insulating shell, and a rotating rod is rotatably arranged on the connecting seat.

[0009] Among them, slide rods are fixed on both sides of the rotating rod, a moving contact is fixed on the upper end of the rotating rod, a support is fixed on the upper end of the push rod, and pillars are fixed on both sides of the support. The two pillars are movably arranged in the slide grooves of the two slide rods.

[0010] Among them, a limit sleeve is fixed on the upper side of the insulating shell, a connecting rod is slidably arranged in the limit sleeve, limit blocks are symmetrically fixed on the side ends of the connecting rod, a fixing ring is fixed on the upper side of the connecting rod, a first spring is fixed between the fixing ring and the limit sleeve, a static contact is fixed at the lower end of the connecting rod, and a second bellows is fixed between the connecting rod and the limit sleeve.

[0011] Among them, an insulating block is fixedly arranged on one side of the moving contact and the stationary contact, a first electromagnetic block is fixedly arranged on the insulating block on the stationary contact side, and an adsorption block which can be adsorbed with the first electromagnetic block is fixedly arranged on the insulating block on the moving contact side.

[0012] Among them, the moving component includes a lower shell fixed with the push rod, an upper shell is slidably arranged on the upper side of the lower shell, a support rod movably passes through the top of the upper shell, and a second spring is symmetrically fixed between the upper shell and the top of the insulating shell and is sleeved on the outside of the support rod.

[0013] An L-shaped rod is fixedly arranged on one side of the upper end of the insulating shell, a toothed disc is rotatably arranged on the L-shaped rod, an annular sleeve is fixedly arranged on one side of the toothed disc, and a coil spring is fixedly arranged between the annular sleeve and the L-shaped rod.

[0014] Among them, a gear rod adapted to the gear disc is provided on one side of the gear disc, a connecting block slidably arranged with the upper shell body is fixed on the upper end of the gear rod, a third spring fixed with the upper shell body is symmetrically fixed on one side of the connecting block, and a third electromagnetic block fixed with the upper shell body is provided on the other side of the connecting block. After power is turned on, the third electromagnetic block can be adsorbed with the connecting block.

[0015] Among them, a rotating sleeve is rotatably arranged on the upper end of the connecting rod, a groove adapted to the rotating sleeve is arranged on the upper end of the connecting rod, a torsion spring is arranged between the rotating sleeve and the fixed ring, a shift rod is fixedly arranged on one side of the rotating sleeve, and a push block matching with the shift rod is fixedly arranged on the side of the toothed disc away from the annular sleeve.

[0016] Among them, an annular block is fixed on the inner side of the upper shell, a second switch electrically connected to the third electromagnetic block is installed on the lower side of the annular block, a mounting block is fixed on one side of the insulating shell, a first switch is installed on the lower side of the mounting block, a second electromagnetic block is fixed on the upper side of the insulating shell, and a magnetic attraction block that can be adsorbed by the second electromagnetic block is fixed on the lower side of the upper shell.

[0017] The present invention has at least the following beneficial effects:

[0018] The present invention uses a contact assembly to gradually rotate the moving contact to close with the stationary contact, so that the relative area between the moving contact and the stationary contact gradually increases to a mutual contact position, thereby reducing the generation of arcs to a certain extent, and can make the moving contact and close with the stationary contact faster according to the size of the current to reduce the effect of the arc, thereby reducing the impact on the service life of the contacts. The stationary contact can be displaced relative to the moving contact by moving the assembly, and arc-burning materials attached to the surfaces of the stationary contact and the moving contact can be wiped off, thereby reducing the impact of the arc-burning materials on the connection effect between the two contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the lower shell and the upper shell of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the cross-section of the lower shell, the upper shell and the insulating shell of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the rotating rod connection of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the explosion of the support, the pillar and the slide rod of the present invention;

[0024] Figure 6 It is a schematic structural diagram of a cross-section of the limiting sleeve of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the explosion of the rotating sleeve and the connecting rod of the present invention;

[0026] Figure 8 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0027] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure of the upper shell section at B in the middle;

[0028] Fig.10 It is a structural schematic diagram of the connection on one side of the toothed disc of the present invention.

[0029] In the figure: 11, circuit breaker body; 12, insulating shell; 2, contact assembly; 21, support rod; 22, push rod; 23, support; 24, pillar; 25, connecting seat; 26, rotating rod; 27, slide rod; 28, moving contact; 29, first bellows; 210, limit sleeve; 211, connecting rod; 212, limit block; 213, static contact; 214, second bellows; 215, insulating block; 216, first electromagnetic block; 217, adsorption block; 218, fixing ring; 219, first spring; 3. Moving assembly; 31. Lower shell; 32. Upper shell; 33. Second spring; 34. Second electromagnetic block; 35. Magnetic block; 36. L-shaped rod; 37. Toothed disc; 38. Annular sleeve; 39. Coil spring; 310. Toothed rod; 311. Connecting block; 312. Third spring; 313. Third electromagnetic block; 314. Rotating sleeve; 315. Groove; 316. Push rod; 317. Push block; 318. Mounting block; 319. Torsion spring; 320. First switch; 321. Annular block; 322. Second switch. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figures 1 to 10 The present invention provides a technical solution: a low-voltage power circuit breaker, comprising: a circuit breaker body 11 and an insulating housing 12,

[0033] The device further comprises: a contact assembly 2, which is arranged on the inner side of the insulating housing 12 and is used for opening and closing the contacts;

[0034] The moving assembly 3 is arranged outside the insulating housing 12 and is used for the misalignment movement between the two contacts.

[0035] During the closing process of the low-voltage circuit breaker body 11, the moving contact 28 can be gradually rotated to close with the static contact 213 through the contact assembly 2, so that the relative area between the moving contact 28 and the static contact 213 gradually increases to the mutual contact position, thereby reducing the generation of arcs to a certain extent, and according to the magnitude of the current, the moving contact 28 can be made to contact and close with the static contact 213 faster to reduce the effect of the arc, thereby reducing the impact on the service life of the contacts. The static contact 213 can be displaced relative to the moving contact 28 through the moving assembly 3, and the arc-burning material attached to the surfaces of the static contact 213 and the moving contact 28 can be erased, thereby reducing the impact of the arc-burning material on the connection effect between the two contacts.

[0036] Embodiment 2

[0037] The contact assembly 2 includes a support rod 21 symmetrically fixed on the upper end of the insulating shell 12. The upper end of the support rod 21 is fixed to the circuit breaker body 11, which can support and fix the insulating shell 12. A push rod 22 is slidably arranged on the lower side of the insulating shell 12. The lower end of the push rod 22 is connected to the transmission mechanism of the circuit breaker body 11. When closing the circuit, the push rod 22 can be driven to move upward through the buckle plate and transmission mechanism of the circuit breaker body 11 (this is the prior art and is not shown in the figure). A first bellows 29 is fixed between the push rod 22 and the insulating shell 12. When the push rod 22 moves up and down, the first bellows 29 is retracted to ensure the vacuum state in the insulating shell 12. A connecting seat 25 is fixed in the insulating shell 12, and a rotating rod 26 is rotatably arranged on the connecting seat 25.

[0038] Slide rods 27 are fixedly provided on both sides of the rotating rod 26, and a slide groove is provided on one side of the slide groove rod 27. A moving contact 28 is fixedly provided on the upper end of the rotating rod 26, and a support 23 is fixedly provided on the upper end of the push rod 22. Pillars 24 are fixedly provided on both sides of the support 23. The pillars 24 are adapted to the slide grooves at the side ends of the slide groove rods 27. The two pillars 24 are movably arranged in the slide grooves of the two slide groove rods 27 respectively. The lower end of the outer side of the push rod 22 can be connected with a lower conductive clip. The push rod 22, the support 23, the pillar 24, the slide groove rod 27, and the rotating rod 26 are made of conductive materials to make the moving contact 28 conductive, or the rotating rod 26 is connected to the lower conductive clip through a wire to make the moving contact 28 conductive, and the slide groove rod 27 can be set as an insulator, or the moving contact 28 can be directly connected to the lower conductive clip through a wire, which can be selected according to actual needs.

[0039] A limit sleeve 210 is fixedly provided on the upper side of the insulating housing 12, a connecting rod 211 is slidably provided in the limit sleeve 210, a limit block 212 is symmetrically fixedly provided on the side end of the connecting rod 211, and a limit groove adapted to the limit block 212 is symmetrically provided on the inner side of the limit sleeve 210. The limit block 212 slides along the limit groove on the inner side of the limit sleeve 210, and can guide and limit the movement of the connecting rod 211 along the limit sleeve 210. A fixing ring 218 is fixedly provided on the upper side of the connecting rod 211, and a first spring 219 is fixedly provided between the fixing ring 218 and the limit sleeve 210. A static contact is fixedly provided at the lower end of the connecting rod 211 213, initially, the position of the static contact 213 can be kept stable by the first spring 219, a second bellows 214 is fixed between the connecting rod 211 and the limiting sleeve 210, when the connecting rod 211 moves along the limiting sleeve 210, the second bellows 214 is extended and retracted, and the vacuum state in the insulating housing 12 can be ensured, the connecting rod 211 can be connected to the conductive clip through a wire, then the connecting rod 211 is made of conductive material, the fixing ring 218 and the limiting sleeve 210 are made of insulating material, or the static contact 213 is directly connected to the conductive clip through a wire, which can be set according to actual needs;

[0040] When closing the circuit breaker, the push rod 22 moves upward, driving the support 23 to move upward, causing the support 24 to move upward along the slide groove of the slide groove rod 27, so that the rotating rod 26 drives the moving contact 28 to rotate close to the static contact 213, so that the relative area between the moving contact 28 and the static contact 213 gradually increases until the moving contact 28 rotates to contact and close with the static contact 213, thereby reducing the generation of arc to a certain extent and reducing the impact on the moving contact 28 and the static contact 213.

[0041] An insulating block 215 is fixedly provided on one side of the moving contact 28 and the stationary contact 213. A first electromagnetic block 216 is fixedly provided on the insulating block 215 on one side of the stationary contact 213. The first electromagnetic block 216 is electrically connected in the circuit. An adsorption block 217 that can be adsorbed with the first electromagnetic block 216 is fixedly provided on the insulating block 215 on one side of the moving contact 28. When the moving contact 28 rotates to close with the stationary contact 213, the first electromagnetic block 216 can generate an adsorption force on the adsorption block 217, so that the moving contact 28 can finally rotate faster to contact with the stationary contact 213 and close in the circuit. When the current is large, the arc effect generated between the moving contact 28 and the static contact 213 will be larger. The larger current can make the magnetism of the first electromagnetic block 216 larger, so that the adsorption force on the adsorption block 217 is larger. When the moving contact 28 rotates, when the distance between the moving contact 28 and the static contact 213 is large, the adsorption effect of the first electromagnetic block 216 on the adsorption block 217 can make the moving contact 28 rotate faster to contact and close with the static contact 213, thereby reducing the generation and effect of the arc and reducing the impact on the service life of the moving contact 28 and the static contact 213.

[0042] Embodiment 3

[0043] The moving assembly 3 includes a lower shell 31 fixed with the push rod 22, an upper shell 32 is slidably arranged on the upper side of the lower shell 31, the support rod 21 movably passes through the top end of the upper shell 32, and a second spring 33 sleeved on the outside of the support rod 21 is symmetrically fixed between the upper shell 32 and the top end of the insulating shell 12. The lower shell 31 and the upper shell 32 are both configured as insulators and are arranged on the outside of the insulating shell 12. If the insulating shell 12 is damaged, the lower shell 31 and the upper shell 32 can also play a protective role when the moving contact 28 and the static contact 213 are closed, thereby playing a further insurance role.

[0044] An L-shaped rod 36 is fixedly provided on one side of the upper end of the insulating housing 12, and a toothed disc 37 is rotatably provided on the L-shaped rod 36. An annular sleeve 38 is fixedly provided on one side of the toothed disc 37, and a coil spring 39 is fixedly provided between the annular sleeve 38 and the L-shaped rod 36. A toothed rod 310 adapted to the toothed disc 37 is provided on one side of the toothed disc 37, and the toothed rod 310 can mesh with the toothed disc 37. A connecting block 311 slidably provided with the upper housing 32 is fixedly provided on the upper end of the toothed rod 310, and an installation cavity is provided at the connecting block 311 of the upper housing 32. The connecting block 311 is slidably arranged in the installation cavity of the upper shell 32, and the upper side of the gear rod 310 movably passes through the lower side of the installation cavity of the upper shell 32 to be fixed with the connecting block 311, and does not hinder the gear rod 310 from moving with the connecting block 311. A third spring 312 fixed to the upper shell 32 is symmetrically fixed on one side of the connecting block 311, and a third electromagnetic block 313 fixed to the upper shell 32 is arranged on the other side of the connecting block 311. After power is turned on, the third electromagnetic block 313 can be adsorbed with the connecting block 311;

[0045] A rotating sleeve 314 is rotatably provided at the upper end of the connecting rod 211, and a groove 315 adapted to the rotating sleeve 314 is provided at the upper end of the connecting rod 211. The rotating sleeve 314 rotates along the groove 315. If the connecting rod 211 is connected to the conductive clip through a wire, the rotating sleeve 314 is made of insulating material. A torsion spring 319 is provided between the rotating sleeve 314 and the fixing ring 218. A lever 316 is fixedly provided on one side of the rotating sleeve 314. A push block 317 matched with the lever 316 is fixedly provided on the side of the toothed disc 37 away from the annular sleeve 38. One side of the push block 317 is provided with an inclined surface. The push blocks 317 are arranged at equal intervals around the circumference of the toothed disc 37. The number of the push blocks 317 can be set according to actual needs.

[0046] An annular block 321 is fixedly provided inside the upper shell 32, and a second switch 322 electrically connected to the third electromagnetic block 313 is installed on the lower side of the annular block 321. A mounting block 318 is fixedly provided on one side of the insulating shell 12, and a first switch 320 is installed on the lower side of the mounting block 318. A second electromagnetic block 34 is fixedly provided on the upper side of the insulating shell 12, and the second electromagnetic block 34 is electrically connected in the circuit. A magnetic attraction block 35 capable of being attracted to the second electromagnetic block 34 is fixedly provided on the lower side of the upper shell 32.

[0047] When in use, under the adsorption effect of the second electromagnetic block 34 on the magnetic attraction block 35, the upper shell 32, the gear rod 310 and the annular block 321 move downward. When closing the switch, the push rod 22 moves upward, driving the lower shell 31 to move upward, so that the lower shell 31 first presses the second switch 322, so that the third electromagnetic block 313 is energized to produce an adsorption effect on the connecting block 311, so that the connecting block 311 drives the gear rod 310 to move close to the toothed disc 37, so that the gear rod 310 and the toothed disc 37 are engaged (if the tooth grooves of the gear rod 310 and the toothed disc 37 do not correspond to each other and fail to engage, the gear rod 310 and the tooth grooves of the toothed disc 37 can also correspond to each other and engage when the gear rod 310 moves upward). 12 is stretched, and the rear push rod 22 drives the lower shell 31 to continue to move upward, so that the lower shell 31 presses the annular block 321 and drives the upper shell 32 to move upward. When the current is large, the arc effect generated between the moving contact 28 and the static contact 213 will be large. The large current will make the second electromagnetic block 34 have a larger adsorption force on the magnetic block 35, so that when the moving contact 28 rotates to contact and close with the static contact 213, the abutment effect between the annular block 321 fixed to the upper shell 32 and the lower shell 31 can be larger, so that the abutment and fit between the upper shell 32 and the lower shell 31 are tighter, so as to better protect through the lower shell 31 and the upper shell 32;

[0048] When the lower shell 31 presses the annular block 321 and drives the upper shell 32 to move upward, the gear rod 310 can be driven to move upward, so that the toothed disc 37 rotates, and the coil spring 39 undergoes elastic changes. When the toothed disc 37 drives the push block 317 to pass the position of the lever 316, under the action of the inclined surface on one side of the push block 317, the end of the lever 316 close to the toothed disc 37 swings away from the toothed disc 37, and the rotating sleeve 314 rotates around the connecting rod 211. The torsion spring 319 undergoes elastic changes so as not to hinder the toothed disc 37 from driving the push block 317. After the push block 317 passes the lever 316, the lever 316 swings in the opposite direction to the initial position under the elastic force of the torsion spring 319. When the moving contact 28 and the stationary contact 213 are closed, the annular block 321 moves up to the lower side of the mounting block 318 and presses the first switch 320, so that the first electromagnetic block 216, the second electromagnetic block 34 and the third electromagnetic block 313 are de-energized. The de-energization of the first electromagnetic block 216 does not hinder the separation and disconnection of the moving contact 28 and the stationary contact 213, so as not to affect the circuit breaker body. 11, after the third electromagnetic block 313 is powered off, the third spring 312 causes the connecting block 311 to move away from the third electromagnetic block 313, so that the toothed rod 310 is separated from the toothed disc 37, and the toothed disc 37 and the push block 317 are rotated in the opposite direction under the elastic force of the coil spring 39. When the push block 317 rotates in the opposite direction and passes the position of the lever 316, the push block 317 can push the lever 316 to move upward, so that the rotating sleeve 314 drives the connecting rod 211 to move upward, and the first spring 219 is stretched, so that the static contact 213 moves up along the surface of the moving contact 28. As the push block 317 rotates with the toothed disc 37, the push block 317 rotates and disengages from the action on the shifting rod 316. Under the elastic force of the first spring 219, the connecting rod 211 and the stationary contact 213 move downward, so that the stationary contact 213 can be displaced relative to the moving contact 28, and the arcing material attached to the surfaces of the stationary contact 213 and the moving contact 28 can be wiped off, thereby reducing the influence of the arcing material on the connection effect between the moving contact 28 and the stationary contact 213.

[0049] When the current is large, the arc effect generated between the moving contact 28 and the static contact 213 will be large, so that there may be more arc-burning materials attached to the surfaces of the moving contact 28 and the static contact 213. When in use, through the adsorption effect of the second electromagnetic block 34 on the magnetic attraction block 35, the upper shell 32 will drive the gear rod 310 and the annular block 321 to move downward a greater distance, so that the distance between the annular block 321 and the upper end of the lower shell 31 is small, so that the lower shell 31 will press the annular block 321 and drive the upper shell 32 to move upward a greater distance, so that the gear rod 310 drives the toothed disc 37 to rotate to a greater extent, and then the subsequent toothed disc 37 can drive the push block 317 to rotate in the opposite direction to a greater extent, so that the push block 317 can push the lever 316 to move upward a relatively large number of times, so that the static contact 213 can move relative to the moving contact 28 a relatively large number of times, so as to remove the more arc-burning materials that may be attached and ensure the cleaning effect.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low voltage power circuit breaker, comprising: The circuit breaker body (11) and the insulating housing (12), It is characterized in that it also includes: a contact assembly (2), the contact assembly (2) is arranged on the inner side of the insulating housing (12), and the contact assembly (2) is used for opening and closing the contacts; A moving component (3) is arranged on the outside of an insulating housing (12), and is used for offset movement between two contacts.

2. The low voltage power circuit breaker according to claim 1, characterized in that: The contact assembly (2) comprises a support rod (21) symmetrically fixed on the upper end of an insulating housing (12); the upper end of the support rod (21) is fixed to the circuit breaker body (11); a push rod (22) is slidably provided through the lower side of the insulating housing (12); a first bellows (29) is fixedly provided between the push rod (22) and the insulating housing (12); a connecting seat (25) is fixedly provided in the insulating housing (12); and a rotating rod (26) is rotatably provided on the connecting seat (25).

3. The low voltage power circuit breaker according to claim 2, characterized in that: Slide groove rods (27) are fixedly provided on both sides of the rotating rod (26), a moving contact (28) is fixedly provided on the upper end of the rotating rod (26), a support (23) is fixedly provided on the upper end of the push rod (22), pillars (24) are fixedly provided on both sides of the support (23), and two pillars (24) are movably arranged in the slide grooves of the two slide groove rods (27), respectively.

4. The low voltage power circuit breaker according to claim 3, characterized in that: A limiting sleeve (210) is fixedly provided on the upper side of the insulating shell (12), a connecting rod (211) is slidably provided inside the limiting sleeve (210), a limiting block (212) is symmetrically fixedly provided on the side end of the connecting rod (211), a fixing ring (218) is fixedly provided on the upper side of the connecting rod (211), a first spring (219) is fixedly provided between the fixing ring (218) and the limiting sleeve (210), a static contact (213) is fixedly provided at the lower end of the connecting rod (211), and a second bellows (214) is fixedly provided between the connecting rod (211) and the limiting sleeve (210).

5. The low voltage power circuit breaker according to claim 4, characterized in that: An insulating block (215) is fixedly provided on one side of the moving contact (28) and the stationary contact (213); a first electromagnetic block (216) is fixedly provided on the insulating block (215) on one side of the stationary contact (213); and an adsorption block (217) that can be adsorbed to the first electromagnetic block (216) is fixedly provided on the insulating block (215) on one side of the moving contact (28).

6. The low voltage power circuit breaker according to claim 4, characterized in that: The moving assembly (3) comprises a lower shell (31) fixed to the push rod (22), an upper shell (32) is slidably arranged on the upper side of the lower shell (31), the support rod (21) movably passes through the top end of the upper shell (32), and a second spring (33) sleeved on the outside of the support rod (21) is symmetrically fixed between the upper shell (32) and the top end of the insulating shell (12).

7. The low voltage power circuit breaker according to claim 6, characterized in that: An L-shaped rod (36) is fixedly provided on one side of the upper end of the insulating housing (12), a toothed disc (37) is rotatably provided on the L-shaped rod (36), an annular sleeve (38) is fixedly provided on one side of the toothed disc (37), and a coil spring (39) is fixedly provided between the annular sleeve (38) and the L-shaped rod (36).

8. The low voltage power circuit breaker according to claim 7, characterized in that: A toothed rod (310) matched with the toothed disc (37) is arranged on one side of the toothed disc (37); a connecting block (311) slidably arranged with the upper shell (32) is fixedly arranged on the upper end of the toothed rod (310); a third spring (312) fixedly arranged with the upper shell (32) is symmetrically fixedly arranged on one side of the connecting block (311); a third electromagnetic block (313) fixedly arranged with the upper shell (32) is arranged on the other side of the connecting block (311); after power is turned on, the third electromagnetic block (313) can be adsorbed with the connecting block (311).

9. The low voltage power circuit breaker according to claim 8, characterized in that: A rotating sleeve (314) is rotatably provided at the upper end of the connecting rod (211), a groove (315) matched with the rotating sleeve (314) is provided at the upper end of the connecting rod (211), a torsion spring (319) is provided between the rotating sleeve (314) and the fixing ring (218), a shifting rod (316) is fixedly provided on one side of the rotating sleeve (314), and a pushing block (317) matched with the shifting rod (316) is fixedly provided on the side of the toothed disc (37) away from the annular sleeve (38).

10. The low voltage power circuit breaker according to claim 8, characterized in that: An annular block (321) is fixedly provided on the inner side of the upper shell (32), and a second switch (322) electrically connected to the third electromagnetic block (313) is installed on the lower side of the annular block (321); a mounting block (318) is fixedly provided on one side of the insulating shell (12), and a first switch (320) is installed on the lower side of the mounting block (318); a second electromagnetic block (34) is fixedly provided on the upper side of the insulating shell (12), and a magnetic attraction block (35) capable of being attracted to the second electromagnetic block (34) is fixedly provided on the lower side of the upper shell (32).

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