Adjustable vacuum circuit breaker

Abstract

The utility model relates to an adjustable vacuum circuit breaker, which comprises a box body, three poles are arranged on the box body, a vacuum arc-extinguishing chamber and an insulating rod connected below the vacuum arc-extinguishing chamber are arranged in the three poles, the insulating rod is connected with a connecting rod, an operating mechanism is arranged on the box body, and the operating mechanism is connected with the vacuum arc-extinguishing chamber. The operating mechanism comprises a transmission shaft rotationally connected to the box body, one end of the transmission shaft penetrates out of the box body and is connected with a crank, the transmission shaft is rotationally connected with a rotating sleeve below each connecting rod, the upper side of the rotating sleeve is connected with a driving rod, and the driving rod is in transmission connection with the connecting rods; the transmission shaft is provided with locking mechanisms corresponding to the rotating sleeves, the locking mechanisms are used for locking the rotating sleeves on the transmission shaft, single-phase control or three-phase simultaneous operation can be carried out at will, two-phase simultaneous operation can also be carried out at will, and only the corresponding control mechanisms need to be controlled to lock the corresponding rotating sleeves. Compared with the prior art, the method is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an adjustable vacuum circuit breaker. Background Art

[0002] Vacuum circuit breakers are widely used in the power transmission and distribution systems of substations, power plants, industrial and mining enterprises, high-rise buildings and other places. Existing vacuum circuit breakers generally include a vacuum interrupter located inside a pillar, an operating mechanism, a bracket and other components, a box body, a current transformer, etc. The operating mechanism is used to make the vacuum interrupter perform closing and opening operations. For existing vacuum circuit breakers, their operating mechanisms generally control each phase separately or operate three phases simultaneously, and cannot achieve the purpose of operating any two phases simultaneously. The flexibility is relatively low, the operation mode is single, and it is not convenient to meet the use requirements. Therefore, a vacuum circuit breaker with the patent publication number of CN219085883U includes a circuit breaker body and a driving mechanism. The driving mechanism includes a transmission shaft, and a fixed sleeve is fixedly sleeved on the transmission shaft. Four single-phase driving rods are fixedly connected to the outer wall of the fixed sleeve. A closing or opening driving mechanism is installed on the circuit breaker. After debugging the positions of the single-phase driving rods on the driving mechanism and completing the position debugging, pull the transmission shaft to connect the corresponding rod bodies and connecting rods together, and then rotate the transmission shaft to achieve the closing or opening operation, so that the operation mode can be switched, and it can be driven single-phase, or two phases can be driven simultaneously or three phases can be driven simultaneously. However, in the actual use process, since the user cannot see the positions of the single-phase driving rods on the fixed sleeve inside the base housing, it is actually a bit difficult and complex to debug a certain rod body on the second rod body, the third rod body and the fourth rod body on the fixed sleeve to the corresponding connecting rod position according to the actual needs. In view of the above problems, this application makes improvements. Summary of the Utility Model

[0003] The utility model provides an adjustable vacuum circuit breaker, which solves the above problems existing in the prior art during use.

[0004] The technical solution of the utility model is realized as follows: an adjustable vacuum circuit breaker includes a box body, three pole columns are arranged on the box body, a vacuum interrupter and an insulating rod connected below the vacuum interrupter are arranged in each of the three pole columns, a connecting rod is connected to the insulating rod, an operating mechanism is arranged on the box body, the operating mechanism includes a transmission shaft rotatably connected to the box body, one end of the transmission shaft penetrates out of the box body and is connected with a crank, a rotating sleeve is rotatably connected below each of the connecting rods on the transmission shaft, a driving rod is connected to the upper side of the rotating sleeve, the driving rod is in transmission connection with the connecting rod, and a locking mechanism is arranged on the transmission shaft corresponding to each of the rotating sleeves, and the locking mechanism is used to lock the rotating sleeve on the transmission shaft.

[0005] An annular groove corresponding to each of the rotating sleeves is formed on the transmission shaft, and the rotating sleeves are rotatably fitted in the annular groove.

[0006] A positioning groove is formed on the inner side of the rotating sleeve near the driving rod. The locking mechanism includes a sliding lock block and a lock block driving mechanism. A control cavity is formed inside the transmission shaft corresponding to the position of each rotating sleeve. The transmission shaft is also provided with a sliding port penetrating into the control cavity in the positioning groove. The sliding lock block is slidably fitted in the sliding port, and the lock block driving mechanism is located in the control cavity for controlling the sliding lock block to insert into the positioning groove.

[0007] The lock block driving mechanism includes a driving block, an electromagnet and a return spring. The electromagnet is fixedly arranged at one end of the control cavity. The driving block is movably arranged in the control cavity. The sliding lock block is located at one end of the control cavity and abuts against the outer side wall of the driving block. A conical inclined surface is provided on the driving block. A first limit baffle is fixedly connected to one end of the driving block facing the electromagnet. A magnetic block is fixedly connected to the first limit baffle. A plurality of axial spring grooves are formed inside the transmission shaft on the inner side of the control cavity. A return arm slidably fitted in the spring groove is fixedly connected to the side surface of the first limit baffle. The return spring is located in the spring groove and is used for pushing the return arm to move towards the side away from the electromagnet.

[0008] One end of the sliding lock block facing the driving block is arc-shaped. A second limit plate is fixedly connected to one end of the driving block away from the first limit baffle.

[0009] One end of the transmission shaft away from the crank is penetrated out of the other side of the box body and connected with a conductive slip ring.

[0010] A control box is provided on the box body. Control buttons for respectively controlling the energization and de-energization of each electromagnet are provided on the control box.

[0011] In summary, the beneficial effects of the present utility model are as follows:

[0012] 1. The present utility model can lock different rotating sleeves by controlling different locking mechanisms. When the crank controls the transmission shaft to rotate, the locked rotating sleeves can be driven to rotate together, so that the driving rod on the rotating sleeve drives the connecting rod, and then drives the insulating rod to perform closing and opening operations on the vacuum interrupter. The present utility model can perform single-phase control or three-phase simultaneous operation arbitrarily, and can also perform any two-phase simultaneous operation. As long as the corresponding control mechanism is controlled to lock the corresponding rotating sleeve, it is more convenient than the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 Schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is Figure 1 Schematic diagram of the structure when observed from the other side;

[0016] Figure 3 Schematic diagram of the transmission shaft in the present invention;

[0017] Figure 4 Schematic diagram of the transmission shaft in the present invention after removing a rotating sleeve;

[0018] Figure 5 Schematic diagram of the rotating sleeve in the present invention;

[0019] Figure 6 Schematic diagram of the cross-sectional structure of the transmission shaft part in the present invention.

[0020] In the figure: 1, box body; 2, pole column; 3, connecting rod; 4, transmission shaft; 41, annular groove; 42, control cavity; 43, sliding port; 44, spring groove; 45, crank; 5, rotating sleeve; 51, positioning groove; 52, driving rod; 61, sliding lock block; 62, driving block; 621, conical inclined surface; 622, first limit baffle; 623, magnetic block; 624, reset arm; 625, second limit plate; 63, electromagnet; 64, reset spring; 7, conductive slip ring; 8, control box; 81, control button. Specific embodiments

[0021] The following will combine the attached Figures 1-6 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 some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Embodiment:

[0023] Such as Figures 1 to 6As shown in the figure, the utility model discloses an adjustable vacuum circuit breaker, which includes a box body 1. Three pole columns 32 are arranged on the box body 1. A vacuum interrupter and an insulating rod connected below the vacuum interrupter are provided in each of the three pole columns 32. The structures and settings of the vacuum interrupter and the insulating rod are common knowledge for those skilled in the art. Therefore, they will not be described in detail in the present utility model. A connecting rod 9 is connected to the insulating rod, and an operating mechanism is arranged on the box body 1. The operating mechanism includes a transmission shaft 4 rotatably connected to the box body 1. One end of the transmission shaft 4 penetrates out of the box body 1 and is connected to a crank 45. In addition, the transmission shaft 4 is rotatably connected with a rotating sleeve 5 below each connecting rod 9. A driving rod 52 is connected to the upper side of the rotating sleeve 5. The driving rod 52 is in transmission connection with the connecting rod 9. The transmission shaft 4 is provided with a locking mechanism corresponding to each rotating sleeve 5. The locking mechanism is used to lock the rotating sleeve 5 on the transmission shaft 4. Therefore, when different rotating sleeves 5 are locked on the transmission shaft 4, the transmission shaft 4 can drive the locked rotating sleeve 5 to rotate together when driven by the crank 45, so that the driving rod 52 on the rotating sleeve 5 drives the connecting rod, and then drives the insulating rod, so as to perform closing and opening operations on the vacuum interrupter. Therefore, the present utility model can perform single-phase control or three-phase simultaneous operation arbitrarily, or perform any two-phase simultaneous operation, as long as the corresponding control mechanism is controlled to lock the corresponding rotating sleeve 5, which is more convenient than the prior art.

[0024] Further, an annular groove 41 corresponding to each rotating sleeve 5 is formed on the transmission shaft 4. The rotating sleeve 5 is rotatably fitted in the annular groove 41, so that the rotating sleeve 5 can only rotate relative to the transmission shaft 4 and cannot slide.

[0025] Specifically, a positioning groove 51 is formed on the inner side of the rotating sleeve 5 near the driving rod 52. The locking mechanism includes a sliding lock block 61 and a lock block driving mechanism. A control cavity 42 corresponding to each rotating sleeve 5 is formed inside the transmission shaft 4. The transmission shaft 4 is also provided with a sliding port 43 penetrating into the control cavity 42 in the positioning groove 51. The sliding lock block 61 is slidably fitted in the sliding port 43. The lock block driving mechanism is located in the control cavity 42 and is used to control the sliding lock block 61 to insert into the positioning groove 51. When the sliding lock block 61 inserts into the positioning groove 51, the rotating sleeve 5 is locked on the transmission shaft 4. At this time, the transmission shaft 4 can drive the rotating sleeve 5 to rotate together when rotating. Otherwise, when the transmission shaft 4 rotates, the friction force between the transmission shaft 4 and the rotating sleeve 5 is not enough to make the transmission shaft 4 drive the rotating sleeve 5.

[0026] More specifically, the lock block driving mechanism includes a driving block 62, an electromagnet 63, and a return spring 64. The electromagnet 63 is fixedly arranged at one end of the control cavity 42, while the driving block 62 is movably arranged within the control cavity 42. The sliding lock block 61 is located at one end of the control cavity 42 and abuts against the outer sidewall of the driving block 62. A conical inclined surface 621 is provided on the driving block 62. When the sliding lock block 61 is at the highest point of the conical inclined surface 621, the sliding lock block 61 is pushed into the positioning groove 51. It should be noted that the sliding lock block 61 has a certain weight. When the sliding lock block 61 is at the lowest point of the conical inclined surface 621, the sliding lock block 61 can fall downward due to gravity, thereby exiting the positioning groove 51. In addition, a first limiting baffle 622 is fixedly connected to one end of the driving block 62 facing the electromagnet 63. A magnetic block 623 is fixedly connected to the first limiting baffle 622. The transmission shaft 4 has a number of axially arranged spring grooves 44 on the inner side of the control cavity 42. A return arm 624 that is slidably fitted within the spring grooves 44 is fixedly connected to the side surface of the first limiting baffle 622. The return spring 64 is located within the spring grooves 44 and is used to push the return arm 624 to move toward the side away from the electromagnet 63. When the electromagnet 63 is energized, the magnetic block 623 is attracted, causing the driving block 62 to move toward the electromagnet 63. At this time, the conical inclined surface 621 pushes the sliding lock block 61 to move upward into the positioning groove 51. When the electromagnet 63 is de-energized, the return spring 64 pushes the driving block 62 to move toward the side away from the electromagnet 63. As the position where the conical inclined surface 621 contacts the sliding lock block 61 gradually becomes lower, the sliding lock block 61 falls downward.

[0027] Wherein, one end of the sliding lock block 61 facing the driving block 62 is arc-shaped. This structure of the sliding lock block 61 facilitates sliding on the driving block 62. In addition, a second limiting plate 625 is fixedly connected to one end of the driving block 62 away from the first limiting baffle 622.

[0028] In addition, one end of the transmission shaft 4 away from the crank 45 penetrates through the other side of the box body 1 and is connected to a conductive slip ring 7. The electromagnet 63 is energized through the conductive slip ring 7 to prevent wire entanglement caused by the rotation of the transmission shaft 4. The conductive slip ring 7 generally includes a rotor connected to the transmission shaft 4 and a stator sleeved outside the rotor. The stator is also fixed on the box body 1 and does not rotate.

[0029] In the present utility model, a control box 8 is further provided on the box body 1. The control box 8 is provided with control buttons 81 for respectively controlling the energization and de-energization of each electromagnet 63. A control circuit board electrically connected to the control buttons 81 is provided within the control box 8. The control circuit board is electrically connected to the electromagnet 63. The control buttons 81 have three for respectively controlling the three electromagnets 63. This circuit connection is also a common means for those skilled in the art, so it will not be elaborated here.

[0030] It should also be noted that the electricity required for the three electromagnets 63 comes from an independent low-voltage power supply.

[0031] The initial position of the crank 45 of the present utility model is downward. At this time, the sliding opening 43 on the transmission shaft 4 is upward. Therefore, at this time, the corresponding electromagnet 63 can be energized by pressing the control button 81, and then the driving block 62 drives the sliding lock block 61 to move upward into the positioning groove 51 to lock the rotating sleeve 5. At this time, the rotating transmission shaft 4 can be driven by the crank 45 to drive the locked rotating sleeve 5. When it is necessary to control other unlocked rotating sleeves 5, the crank 45 needs to be rotated to the initial position (that is, one opening and closing is a complete process, and this complete process must be completed to re-select which rotating sleeves to lock). At this time, the sliding opening 43 on the transmission shaft 4 is upward, and then the sliding lock block 61 can be controlled to move upward into the positioning groove 51. The cross-section of the positioning groove 51 is inverted V-shaped, and the end of the sliding lock block 61 facing the rotating sleeve 5 is also triangular, which is convenient for the sliding lock block 61 to enter the positioning groove 51, and even if there is a little deviation in the position, it does not matter.

[0032] At the same time, it should be pointed out that the terms used in the present utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An adjustable vacuum circuit breaker, comprising a box body, three pole columns are provided on the box body, a vacuum interrupter and an insulating rod connected below the vacuum interrupter are provided in each of the three pole columns, a connecting rod is connected to the insulating rod, and an operating mechanism is provided on the box body, and it is characterized in that: The operating mechanism includes a transmission shaft rotatably connected to the box body. One end of the transmission shaft penetrates out of the box body and is connected with a crank. The transmission shaft is rotatably connected with a rotating sleeve below each of the connecting rods. A driving rod is connected to the upper side of the rotating sleeve, and the driving rod is in transmission connection with the connecting rod. The transmission shaft is provided with a locking mechanism corresponding to each of the rotating sleeves, and the locking mechanism is used to lock the rotating sleeve on the transmission shaft.

2. The adjustable vacuum circuit breaker according to claim 1, characterized in that: An annular groove corresponding to each of the rotating sleeves is formed on the transmission shaft, and the rotating sleeve is rotatably fitted in the annular groove.

3. An adjustable vacuum circuit breaker according to claim 2, characterized in that: A positioning groove is formed on the inner side of the rotating sleeve near the driving rod. The locking mechanism includes a sliding lock block and a lock block driving mechanism. A control cavity is formed in the transmission shaft corresponding to each of the rotating sleeves. The transmission shaft is further provided with a sliding port penetrating into the control cavity in the positioning groove. The sliding lock block is slidably fitted in the sliding port, and the lock block driving mechanism is located in the control cavity and used to control the sliding lock block to insert into the positioning groove.

4. An adjustable vacuum circuit breaker according to claim 3, characterized in that: The lock block driving mechanism includes a driving block, an electromagnet and a return spring. The electromagnet is fixedly arranged at one end of the control cavity. The driving block is movably arranged in the control cavity. The sliding lock block is located at one end of the control cavity and abuts against the outer side wall of the driving block. A conical inclined surface is arranged on the driving block. A first limit baffle is fixedly connected to the end of the driving block facing the electromagnet. A magnetic block is fixedly connected to the first limit baffle. A plurality of axial spring grooves are formed in the inner side of the transmission shaft in the control cavity. A return arm slidably fitted in the spring groove is fixedly connected to the side surface of the first limit baffle. The return spring is located in the spring groove and used to push the return arm to move towards the side away from the electromagnet.

5. An adjustable vacuum circuit breaker according to claim 4, characterized in that: One end of the sliding lock block facing the driving block is arc-shaped. A second limit plate is fixedly connected to the end of the driving block away from the first limit baffle.

6. The adjustable vacuum circuit breaker according to claim 4, characterized in that: The end of the transmission shaft away from the crank penetrates out of the other side of the box body and is connected with a conductive slip ring.

7. An adjustable vacuum circuit breaker according to claim 4, characterized in that: A control box is arranged on the box body, and control buttons for respectively controlling the energization and de-energization of each of the electromagnets are arranged on the control box.

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