A safety locking device for a ring main unit and a method of using the same

Abstract

The embodiments of the present invention provide a safety locking device for a ring network cabinet and a method for using the same, which relate to the field of locking equipment for a ring network cabinet. The device comprises: a protective base, a turntable, a driving unit and a locking mechanism; the protective base is a hollow structure, the turntable is rotatably mounted on the protective base, and the driving unit and the locking mechanism are both mounted in the protective base; the driving unit comprises a gear, a bracket, a first rack, a connecting rod and a driving rod, the gear is rotatably mounted in the inner cavity of the protective base, and the gear is connected to the turntable, and the bracket is mounted in the protective base. The work of pulling off the isolating knife switch and closing the grounding knife switch can be completed in one operation, reducing the operating steps of the staff; in addition, it can ensure that the cabinet door will not be opened before the power is completely cut off, and save the operating time, ensuring that the power is disconnected safely and effectively during the operation, thereby reducing the risk of electric shock for the operator.

Description

Technical Field

[0001] The invention relates to the field of ring main unit locking equipment, and in particular to a safety locking device for a ring main unit and a use method thereof. Background Art

[0002] In modern power systems, ring main units are important power distribution equipment and are widely used in urban and industrial power grids. Their main function is to convert power from high-voltage systems to low-voltage systems in order to provide stable power to end users. Since ring main units are usually in a high-voltage and high-current working environment, their safety is of vital importance.

[0003] The ring main unit needs to be repaired after being damaged, and the ring main unit needs to be in a power-off or grounded state during the repair. The usual practice is: open the circuit breaker, disconnect the isolating switch, and close the grounding switch. The specific method of disconnecting the isolating switch and closing the grounding switch is to use a wrench to rotate them in the corresponding operating holes in turn to achieve the purpose of opening and closing the corresponding switches; the common ring main units in the current price segment are usually installed in a metal cabinet for use, and the metal cabinet door is normally in a closed state.

[0004] Since the ring main unit is always energized before power is cut off or grounded, the staff needs to open the cabinet door to perform the power-off operation, especially to disconnect the isolation switch and close the grounding switch. If there is leakage in the ring main unit during this process, there will be certain safety hazards.

[0005] Based on this, the present invention is proposed. Summary of the invention

[0006] According to an embodiment of the present invention, a safety locking device for a ring main unit and a method for using the same are provided, which are used to solve the problem that workers need to open the cabinet door to cut off the power, and if there is leakage in the ring main unit during this process, there are certain safety hazards.

[0007] In a first aspect of the present invention, a safety locking device for a ring main unit is provided.

[0008] The safety locking device of the ring main unit comprises: a protection base, a rotating disk, a driving part and a locking mechanism; the interior of the protection base is a hollow structure, the rotating disk is rotatably mounted on the protection base, and the driving part and the locking mechanism are both mounted in the protection base;

[0009] The driving part includes a gear, a bracket, a first rack, a connecting rod and a driving rod, the gear is rotatably mounted in the inner cavity of the protective base, and the gear is connected to the turntable, the bracket is mounted in the protective base, the first rack is mounted on the side of the bracket opposite to the gear, the gear is meshed with the first rack, the connecting rod is mounted on the bracket, and the driving rod is mounted on the end of the connecting rod away from the bracket;

[0010] The locking mechanism includes a connecting seat, a rotating rod and a locking rod. The connecting seat is rotatably connected to the driving rod, one end of the rotating rod is rotatably connected to the connecting seat, one end of the locking rod is rotatably connected to the other end of the rotating rod, and the other end of the locking rod extends out of the outer wall of the protective base.

[0011] Preferably, the driving part further includes a slide groove and a sliding block, the sliding block is installed on the bracket, the slide groove is installed on the inner wall of the protective base, and the sliding block is slidably connected to the slide groove.

[0012] Preferably, the inner cavity of the protection base is also equipped with a locking mechanism, and the locking mechanism is used to lock the turntable after rotation;

[0013] The locking mechanism includes a mounting frame, a channel, a first slot, a limiting slot, a limiting block, a locking block, a second slot, a first spring, a fixing rod, a locking rod and a second spring. The mounting frame is mounted on the inner wall of the protective base, the channel is opened on the mounting frame, the first slot is opened on the lower surface of the mounting frame, the limiting slot is installed on the mounting frame, the limiting block is installed in the limiting slot, the locking block is installed on the side of the limiting block away from the mounting frame, the second slot is opened on the lower surface of the locking block, the first spring is installed between the limiting slot and the limiting block, the fixing rod is installed on the inner wall of the protective base, the locking rod is installed on the gear, and the second spring is installed between the fixing rod and the locking rod.

[0014] Preferably, an arc-shaped joint is installed on the locking block.

[0015] Preferably, two closing parts are rotatably mounted on the protection base;

[0016] The closing part includes a rotating base, a first limiting cavity, a second limiting cavity, an insulating rod, a clamping rod and a wrench. The rotating base is rotatably installed on the protective base. The first limiting cavity and the second limiting cavity are respectively opened on the rotating base. The second limiting cavity is T-shaped, and the first limiting cavity and the second limiting cavity are connected. The insulating rod is inserted into the rotating base, and one end of the insulating rod passing through the inner cavity of the protective base is connected to the wrench. The other end of the insulating rod is rotatably installed with a clamping rod, and the shape of the clamping rod is adapted to the second limiting cavity. The insulating rod is made of insulating ceramic material.

[0017] Preferably, a gear ring is fixedly mounted on the rotating base, a second rack and a limiting wall are mounted on the side of the bracket opposite to the rotating base, and the gear ring is meshingly connected with the second rack.

[0018] Preferably, a viewing window is provided on the protective base, a fixing seat is installed in the viewing window, a rotating ball is installed on the fixing seat, and a pull rod is installed through the rotating ball.

[0019] In a second aspect of the present invention, a method for using a safety locking device of a ring main unit is provided.

[0020] The steps include:

[0021] Pull the lever to press the circuit breaker switch;

[0022] Taking the clamping rod out of the second limiting cavity, rotating the clamping rod and inserting the clamping rod into the first limiting cavity;

[0023] The turntable is rotated to rotate the gears together, thereby moving the bracket downward, and the connecting seat is moved downward by pulling the connecting rod and the driving rod, so that the rotating rod is rotated and the locking rod moves toward the inner cavity of the protective base;

[0024] The bracket moves downward, and the second rack drives the gear ring to rotate, so that one of the rotating bases drives the insulating rod, the clamping rod, and the wrench at the top to rotate together, so as to complete the work of pulling off the isolation knife switch, and then the second rack drives another gear ring to rotate, so as to complete the work of closing the grounding knife switch by rotating another rotating base;

[0025] The turntable is rotated and the locking rod is completely retracted into the protective base.

[0026] Preferably, when the rotating disk rotates, the locking rod moves in a circular motion and leaves the first slot, and the second spring is stretched;

[0027] The locking rod contacts the arc-shaped joint and pushes the locking block upward, stretching the first spring at the same time. When the locking rod is inserted into the second slot, the locking block is reset, and the locking rod is limited by the tension of the first spring.

[0028] In a third aspect of the present invention, a ring main unit is provided.

[0029] The ring main unit includes the above-mentioned safety locking device of the ring main unit, and also includes a cabinet body, a slide rail, a pulley and a cabinet door, wherein the slide rail is installed on the upper surface of the cabinet body, the pulley is installed on the protective base, and the pulley is clamped with the slide rail, the cabinet door is hinged to the cabinet body, and the cabinet door corresponds to the position of the protective base.

[0030] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0031] 1. The present invention provides a safety locking device for a ring main unit and a method for using the same. By rotating two rotating bases in sequence, the work of disconnecting the isolating switch and closing the grounding switch can be completed in one operation, thereby reducing the operating steps of the staff.

[0032] 2. In the present invention, by rotating the turntable and utilizing the linkage of the driving part, the locking mechanism can be activated, and at the same time, the locking mechanism can prevent the turntable from rotating on its own, thereby ensuring the stability of the equipment.

[0033] 3. The present invention utilizes the cooperation of the second rack and the gear ring to achieve synchronous operation of the rotation of the rotating base and the activation of the locking mechanism, which can not only ensure that the cabinet door will not be opened before the power is completely cut off, but also save the operating steps of the staff.

[0034] 4. In the present invention, the contact between the pull rod and the circuit breaker ensures that the power supply of the ring main unit body can be safely and effectively disconnected during operation, reducing the risk of electric shock to the operator.

[0035] In summary, the present invention can complete the work of disconnecting the isolation switch and closing the grounding switch in one operation, reducing the operating steps of the staff; in addition, it can ensure that the cabinet door will not be opened before the power is completely cut off, and save operation time, ensuring that the power is disconnected safely and effectively during the operation, thereby reducing the risk of electric shock for the operator.

[0036] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0038] Figure 1A schematic structural diagram of a safety locking device for a ring main unit according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic diagram of the explosion structure of a safety locking device for a ring main unit according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic structural diagram of a closing part of a safety locking device for a ring main unit according to an embodiment of the present invention is shown;

[0041] Figure 4 A schematic cross-sectional structure diagram of a protective base of a safety locking device of a ring main unit according to an embodiment of the present invention is shown;

[0042] Figure 5 A schematic structural diagram of a driving part of a safety locking device of a ring main unit according to an embodiment of the present invention is shown;

[0043] Figure 6 A schematic structural diagram of a locking mechanism of a safety locking device of a ring main unit according to an embodiment of the present invention is shown;

[0044] Figure 7 A schematic structural diagram of a locking mechanism of a safety locking device of a ring main unit according to an embodiment of the present invention is shown;

[0045] Figure 8 A schematic diagram of the exploded structure of the locking mechanism of the safety locking device of the ring main unit according to an embodiment of the present invention is shown;

[0046] Fig. 9 A schematic diagram showing a locking state of a locking mechanism of a safety locking device of a ring main unit according to an embodiment of the present invention;

[0047] Fig.10 A schematic diagram showing another locking state of the locking mechanism of the safety locking device of the ring main unit according to an embodiment of the present invention;

[0048] Fig.11 A schematic diagram of a safety locking device fixing seat and a rotating ball explosion structure of a ring main unit according to an embodiment of the present invention is shown;

[0049] Fig.12 A schematic diagram of an exploded structure of a ring main unit according to an embodiment of the present invention is shown;

[0050] Fig.13 A schematic diagram showing a closed state of a ring main unit according to an embodiment of the present invention is shown;

[0051] Fig.14 A schematic diagram of the slide rail structure of a ring main unit according to an embodiment of the present invention is shown;

[0052] Fig.15A schematic structural diagram of the matching state between a toothed ring and a second rack of a safety locking device of a ring main unit according to an embodiment of the present invention is shown.

[0053] The reference numerals are as follows:

[0054] 1. Protective base, 2. Turntable, 21. Handle, 3. Driving unit, 31. Gear, 32. Bracket, 33. First rack, 34. Connecting rod, 35. Driving rod, 36. Slide groove, 37. Sliding block, 4. Locking mechanism, 41. Connecting seat, 42. Turning rod, 43. Locking rod, 5. Locking mechanism, 51. Mounting frame, 52. Channel, 53. First slot, 54. Limiting slot, 55. Limiting block, 56. Locking block, 561. Arc joint, 57. Second slot, 58. First spring, 59. fixing rod, 510. locking rod, 511. second spring, 6. closing part, 61. rotating base, 62. first limiting cavity, 63. second limiting cavity, 64. insulating rod, 65. clamping rod, 66. wrench, 67. third spring, 7. gear ring, 8. second rack, 9. limiting wall, 10. window, 11. fixing seat, 12. rotating ball, 121. pull rod, 13. cabinet, 14. slide rail, 15. pulley, 16. cabinet door, 17. ring network cabinet body, 171. operation hole. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0056] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] like Figure 1 , Figure 2 and Figure 4As shown, the safety locking device of the ring main unit includes: a protective base 1, a turntable 2, a driving unit 3 and a locking mechanism 4; the interior of the protective base 1 is a hollow structure, the turntable 2 is rotatably mounted on the protective base 1, and a handle 21 is mounted on the turntable 2 to facilitate the user to rotate the turntable 2, wherein the handle 21 is made of insulating ceramics and has good insulation to avoid electric shock. The driving unit 3 and the locking mechanism 4 are both mounted in the protective base 1, and rotating the turntable 2 can enable the locking mechanism 4 to complete the locking and opening actions through the action of the driving unit 3.

[0058] refer to Figure 12 to Figure 14 The safety locking device of the ring main unit is used in the ring main unit, wherein the ring main unit also includes a cabinet 13, a slide rail 14, a pulley 15 and a cabinet door 16. The slide rail 14 is installed on the upper surface of the cabinet 13, and the pulley 15 is installed on the protective base 1. The pulley 15 is clamped with the slide rail 14, and the pulley 15 can slide on the slide rail 14. At the same time, the cross section of the pulley 15 is set in an I-shaped manner to ensure that the pulley 15 can remain stable after being clamped on the slide rail 14 and will not deviate from the track. The cabinet door 16 is hinged to the cabinet 13, and the position of the cabinet door corresponds to the protective base 1. After closing the cabinet door 16, the cabinet door 16 can be locked by the safety locking device of the ring main unit to ensure that the cabinet door 16 cannot be opened by itself. At this time, the cabinet door 16 and the protective base 1 form a whole, which can close the cabinet 13, and then close the ring main unit body 17 located in the cabinet 13.

[0059] refer to Figure 2 , Figure 4 and Figure 5 The driving part 3 includes a gear 31, a bracket 32, a first rack 33, a connecting rod 34, a driving rod 35, a slide 36 and a slider 37. The gear 31 is rotatably mounted in the inner cavity of the protective base 1, and the gear 31 is connected to the turntable 2. The bracket 32 ​​is mounted in the protective base 1, and the bracket 32 ​​can move up and down. The slider 37 is mounted on the bracket 32, and the slide 36 is mounted on the inner wall of the protective base 1. The slider 37 is slidably connected with the slide 36. When the bracket 32 ​​moves up and down, the slider 37 slides in the inner cavity of the slide 36. The two mutually limit and cooperate to ensure the stability of the bracket 32. The first rack 33 is mounted on the side of the bracket 32 ​​opposite to the gear 31. The gear 31 is meshed and connected with the first rack 33, thereby ensuring that when the turntable 2 and the gear 31 rotate synchronously, the bracket 32 ​​can move up and down. There are two connecting rods 34, which are respectively mounted on the bracket 32, and the driving rod 35 is mounted on the end of the connecting rod 34 away from the bracket 32.

[0060] like Figures 4 to 6As shown, there are two locking mechanisms 4, which include a connecting seat 41, a rotating rod 42 and a locking rod 43. The connecting seat 41 is rotatably connected to the driving rod 35. When the bracket 32 ​​moves up and down, the connecting seat 41 can be synchronously driven to move up and down. One end of the rotating rod 42 is rotatably connected to the connecting seat 41, and one end of the locking rod 43 is rotatably connected to the other end of the rotating rod 42. The other end of the locking rod 43 extends out of the outer wall of the protective base 1. By using the limiting effect of the protective base 1, it can be ensured that the locking rod 43 only moves in the horizontal direction. When the connecting seat 41 moves downward, the rotating rod 42 can be rotated, so that the locking rod 43 moves toward the connecting seat 41.

[0061] In actual use, its specific working principle is as follows: rotating the turntable 2 makes the gear 31 rotate together, and utilizing the meshing of the gear 31 and the first rack 33 to move the bracket 32 ​​downward, and then by pulling the connecting rod 34 and the driving rod 35, the connecting seat 41 moves downward, and then the rotating rod 42 rotates and the locking rod 43 retracts into the inner cavity of the protective base 1. At this time, the cabinet door 16 locked by the locking rod 43 is out of the limited state. Conversely, rotating the turntable 2 in the opposite direction can extend the locking rod 43 to lock the cabinet door 16 and ensure that the cabinet door 16 cannot be opened.

[0062] In this embodiment, the limiting effect of the locking rod 43 ensures that the cabinet door 16 cannot be opened by itself during repair and maintenance, reducing the risk of misoperation, thereby effectively ensuring the safety of the operator; the meshing structure of the gear 31 and the first rack 33 is adopted to ensure that the bracket 32 ​​is stable and reliable during the up and down movement, and that the two locking mechanisms 4 can be opened and closed synchronously. At the same time, the limiting effect of the protective base 1 is utilized to ensure the stability and precision of the locking rod 43.

[0063] In order to ensure that the turntable 2 remains stable after rotation and to prevent the locking mechanism 4 from being unstable due to self-rotation, the following solution is proposed: a locking mechanism 5 is also installed in the inner cavity of the protective base 1, and the locking mechanism 5 is used to lock the turntable 2 after rotation.

[0064] like Figure 4 , Figures 7 to 10As shown, the locking mechanism 5 includes a mounting frame 51, a channel 52, a first slot 53, a limiting slot 54, a limiting block 55, a locking block 56, a second slot 57, a first spring 58, a fixing rod 59, a locking rod 510 and a second spring 511. The mounting frame 51 is mounted on the inner wall of the protective base 1, and the channel 52 is provided on the mounting frame 51. The space of the channel 52 is used to avoid the second spring 511 to avoid interference. The first slot 53 is provided on the lower surface of the mounting frame 51. The limiting slot 54 is installed on the mounting frame 51, the limiting block 55 is installed in the limiting slot 54, and the locking block 56 is installed on the side of the limiting block 55 away from the mounting frame 51. When the locking block 56 moves up and down, the limiting block 55 slides in the limiting slot 54. The limiting effect of the limiting slot 54 is used to ensure that the locking block 56 is stable to avoid displacement or skew. The second slot 57 is provided on the lower surface of the locking block 56. An arc-shaped joint 561 is installed on the locking block 56. The first spring 58 is installed between the limiting groove 54 and the limiting block 55. When the locking block 56 moves upward, the first spring 58 is stretched. After the external force is removed, the locking block 56 can be reset by the tension of the first spring 58. The fixing rod 59 is installed on the inner wall of the protective base 1, wherein the first slot 53 and the second slot 57 are respectively located on both sides of the fixing rod 59 in the horizontal direction. The locking rod 510 is installed on the gear 31, and the second spring 511 is installed between the fixing rod 59 and the locking rod 510. The rotation of the gear 31 can drive the locking rod 510 to move in a circle, thereby stretching the second spring 511.

[0065] The working principle in actual use is as follows: in the initial state, the locking rod 510 is clamped in the first slot 53. At this time, the second spring 511 is in a stretched state. The tension of the second spring 511 and the limitation of the first slot 53 are used to ensure that the position of the locking rod 510 is fixed, thereby preventing the turntable 2 from rotating. This is the first locking state; the turntable 2 is rotated with force to make the locking rod 510 move in a circle and leave the first slot 53. In this process, the second spring 511 is further stretched until the locking rod 510 contacts the arc joint 561 and pushes the locking block 56 upward, while stretching the first spring 58. When the second slot 57 corresponds to the locking rod 510, the tension of the first spring 58 is used to limit the locking rod 510, and the tension direction is toward the fixed rod 59. The locking rod 510 is limited by the inner cavity of the second slot 57 away from the arc joint 561, which can prevent the locking rod 510 from falling out. The rotating disk 2 is rotated in the reverse direction with force, so that the locking rod 510 contacts the arc-shaped joint 561 again, and then the locking block 56 moves upward, and the locking rod 510 can be rotated in the reverse direction.

[0066] The solution provided by this embodiment, through the pulling force of the second spring 511, the locking rod 510 can be limited in the first slot 53 or the second slot 57, which can effectively fix the turntable 2, so that the turntable 2 has two limiting capabilities in the locked state, avoiding accidental rotation in the working state, thereby improving the overall stability of the device; at the same time, only the turntable 2 needs to be rotated to automatically lock, which is easy to operate. In conjunction with the function of the aforementioned driving unit 3, the locking rod 43 can be extended or retracted and locked.

[0067] In actual use, since the ring main unit body 17 is always in a energized state before being powered off or grounded, in order to ensure that the ring main unit body 17 is powered off and grounded before opening the cabinet door 16 and to improve safety, the following solution is proposed: two closing parts 6 are also rotatably installed on the protective base 1.

[0068] like Figures 2 to 5 and Fig.15 As shown, the closing part 6 includes a rotating base 61, a first limiting cavity 62, a second limiting cavity 63, an insulating rod 64, a clamping rod 65, a wrench 66 and a third spring 67. The rotating base 61 is rotatably installed on the protective base 1, and a gear ring 7 is fixedly installed on the rotating base 61. A second rack 8 and a limiting wall 9 are installed on the side opposite to the rotating base 61 of the bracket 32. The gear ring 7 is meshed with the second rack 8. When the bracket 32 ​​moves downward, the gear ring 7 can be driven to rotate by utilizing the action of the second rack 8, and then the rotating base 61 is driven to rotate. When the second rack 8 is disengaged from the gear ring 7, two adjacent teeth on the gear ring 7 will simultaneously fit the limiting wall 9, so that the limiting wall 9 and the teeth of the gear ring 7 cooperate to limit the gear ring 7 and prevent the gear ring 7 from rotating. The first limiting cavity 62 and the second limiting cavity 63 are respectively provided on the rotating base 61, and the second limiting cavity 63 is T-shaped, and the first limiting cavity 62 and the second limiting cavity 63 are connected. The insulating rod 64 is plugged into the rotating base 61, and one end of the insulating rod 64 that passes through the inner cavity of the protective base 1 is connected to the wrench 66, and the other end of the insulating rod 64 is rotatably mounted with a clamping rod 65, and the shape of the clamping rod 65 is adapted to the second limiting cavity 63. When the clamping rod 65 is embedded in the first limiting cavity 62, the length of the insulating rod 64 extending into the cabinet body 13 reaches the maximum, and the clamping rod 65 is pulled outward and rotated, and the clamping rod 65 can be placed in the second limiting cavity 63. It is worth noting that in this embodiment, the rotating bases 61 in the two closing parts 6 correspond to the two operating holes 171 of the ring network cabinet body 17 respectively, ensuring that the wrench 66 can be accurately inserted into the operating hole 171. The wrench 66 is an existing device, and the model of the ring main unit 17 in this embodiment is ZKRM6-12. The models of the two wrenches 66 can be selected to correspond to the operating holes 171 of the ZKRM6-12 ring main unit 17. In addition, the insulating rod 64 in this embodiment is made of insulating ceramic material to ensure that the wrench 66 and the clamping rod 65 cannot form a complete conductor to prevent electric shock during operation.

[0069] like Fig.11 As shown, a window 10 is provided on the protective base 1, a fixing seat 11 is installed in the window 10, a rotating ball 12 is installed on the fixing seat 11, and the length of the rotating ball 12 extending from the fixing seat 11 is less than its own radius, thereby ensuring that the rotating ball 12 can rotate and will not fall off. A pull rod 121 is installed through the rotating ball 12, and the pull rod 121 can slide in the rotating ball, and both ends of the pull rod 121 are respectively provided with insulating blocks of ceramic material, which can not only ensure that the pull rod 121 will not be separated from the rotating ball, but also ensure that the current will not be transmitted through the pull rod 121 when the end of the pull rod 121 contacts a charged object.

[0070] In actual use, the pull rod 121 is rotated to make it contact with the circuit breaker of the ring network cabinet body 17 and press the circuit breaker button of the ring network cabinet body 17, then the clamping rod 65 is taken out from the second limit cavity 63, the clamping rod 65 is rotated and pushed toward the ring network cabinet body 17, until the clamping rod 65 enters the first limit cavity 62, and the wrench is inserted into the operation hole 171. The turntable 2 is rotated to move the bracket 32 ​​downward, and the second rack 8 is used to drive the gear ring 7 to rotate, so that the rotating base 61 drives the insulating rod 64, the clamping rod 65 and the wrench 66 at the top to rotate together, and the work of pulling off the isolation knife switch is completed. Then the second rack 8 is separated from the gear ring 7 and limited by the limit wall 9, and then the second rack 8 drives another gear ring 7 to rotate, and then another rotating base 61 is used to rotate to complete the work of closing the grounding knife switch, and the ring network cabinet body 17 is completely powered off.

[0071] In this solution, the contact between the pull rod 121 and the circuit breaker ensures that the power supply of the ring main unit 17 can be safely and effectively disconnected during operation, reducing the risk of electric shock to the operator; by the successive rotation of the two rotating bases 61, the work of pulling off the isolation switch and closing the grounding switch can be completed in one operation, which is easy to operate. At the same time, by cooperating with the locking mechanism 4, it is ensured that the power off and grounding are completed while the limit lock of the cabinet door 16 is released, thereby improving the safety of the equipment.

[0072] In addition, another embodiment of the present invention further provides a method for using a safety locking device of a ring main unit, comprising the following steps:

[0073] Pull the pull rod 121 to press the circuit breaker switch on the ring main unit body 17;

[0074] Take the clamping rod 65 out of the second limiting cavity 63, rotate the clamping rod 65 and insert it into the first limiting cavity 62, so that the wrench is inserted into the operating hole 171;

[0075] Rotate the turntable 2 to rotate the gear 31 together, thereby moving the bracket 32 ​​downward, and pulling the connecting rod 34 and the driving rod 35 to move the connecting seat 41 downward, so that the rotating rod 42 rotates and the locking rod 43 moves toward the inner cavity of the protective base 1;

[0076] The bracket 32 ​​moves downward, and the second rack 8 drives the gear ring 7 to rotate, so that one of the rotating bases 61 drives the insulating rod 64, the clamping rod 65, and the wrench 66 at the top to rotate together, and the work of pulling off the isolation knife switch is completed. Then, the second rack 8 drives the other gear ring 7 to rotate, and then the other rotating base 61 is rotated to complete the work of closing the grounding knife switch;

[0077] After the turntable 2 has completed its rotation, the locking rod 43 is completely retracted into the protective base 1, and the cabinet door 16 is released from the limited locking state and can be opened;

[0078] The protection base 1 is pushed horizontally, and the pulley 15 cooperates with the slide rail 14 to make the protection base 1 translate, so as to ensure that the ring main unit body 17 is exposed.

[0079] The steps include:

[0080] When the rotating disk 2 rotates, the locking rod 510 moves in a circular motion and leaves the first locking groove 53, and the second spring 511 is stretched;

[0081] The locking rod 510 contacts the arc-shaped joint 561 and pushes the locking block 56 upward, while stretching the first spring 58. When the locking rod 510 is inserted into the second slot 57, the locking block 56 is reset, and the locking rod 510 is limited by the tension of the first spring 58.

[0082] It is worth noting that, when a special situation occurs and it is not necessary to perform a power-off operation, the pull rod 121 and the clamping rod 65 do not need to be operated in advance, and the rotary disk 2 can be directly rotated to complete the recovery of the locking rod 43.

[0083] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety locking device for a ring main unit, characterized in that: include: A protection base (1), a rotating disk (2), a driving unit (3) and a locking mechanism (4); the interior of the protection base (1) is a hollow structure, the rotating disk (2) is rotatably mounted on the protection base (1), and the driving unit (3) and the locking mechanism (4) are both mounted inside the protection base (1); The driving part (3) comprises a gear (31), a bracket (32), a first rack (33), a connecting rod (34) and a driving rod (35); the gear (31) is rotatably mounted in the inner cavity of the protective base (1), and the gear (31) is connected to the turntable (2); the bracket (32) is mounted in the protective base (1); the first rack (33) is mounted on a side of the bracket (32) opposite to the gear (31); the gear (31) is meshedly connected to the first rack (33); the connecting rod (34) is mounted on the bracket (32); and the driving rod (35) is mounted on an end of the connecting rod (34) away from the bracket (32); The locking mechanism (4) comprises a connecting seat (41), a rotating rod (42) and a locking rod (43); the connecting seat (41) is rotationally connected to the driving rod (35); one end of the rotating rod (42) is rotationally connected to the connecting seat (41); one end of the locking rod (43) is rotationally connected to the other end of the rotating rod (42); and the other end of the locking rod (43) extends out of the outer wall of the protective base (1); Two closing parts (6) are also rotatably mounted on the protection base (1); the closing part (6) comprises a rotating base (61), a first limiting cavity (62), a second limiting cavity (63), an insulating rod (64), a clamping rod (65) and a wrench (66); the rotating base (61) is rotatably mounted on the protection base (1); the first limiting cavity (62) and the second limiting cavity (63) are respectively provided on the rotating base (61); the second limiting cavity (63) is The insulating rod (64) is inserted into the rotating base (61), one end of the insulating rod (64) passing through the inner cavity of the protective base (1) is connected to the wrench (66), and a clamping rod (65) is rotatably mounted on the other end of the insulating rod (64), and the shape of the clamping rod (65) is adapted to the second limiting cavity (63); the insulating rod (64) is made of insulating ceramic material; A gear ring (7) is fixedly mounted on the rotating base (61), a second rack (8) and a limiting wall (9) are mounted on a side of the bracket (32) opposite to the rotating base (61), and the gear ring (7) is meshingly connected with the second rack (8).

2. The safety locking device of the ring main unit according to claim 1, characterized in that: The driving part (3) further comprises a slide groove (36) and a sliding block (37); the sliding block (37) is mounted on the bracket (32); the slide groove (36) is mounted on the inner wall of the protective base (1); and the sliding block (37) is slidably connected to the slide groove (36).

3. The safety locking device of the ring main unit according to claim 2, characterized in that: The inner cavity of the protection base (1) is also provided with a locking mechanism (5), and the locking mechanism (5) is used to lock the rotating disk (2) after rotation; The locking mechanism (5) comprises a mounting frame (51), a channel (52), a first slot (53), a limiting slot (54), a limiting block (55), a locking block (56), a second slot (57), a first spring (58), a fixing rod (59), a locking rod (510) and a second spring (511); the mounting frame (51) is mounted on the inner wall of the protective base (1); the channel (52) is provided on the mounting frame (51); the first slot (53) is provided on the lower surface of the mounting frame (51); the limiting slot (54) is mounted on the mounting frame (51); The limit block (55) is installed in the limit groove (54), the locking block (56) is installed on a side of the limit block (55) away from the mounting frame (51), the second slot (57) is opened on the lower surface of the locking block (56), the first spring (58) is installed between the limit groove (54) and the limit block (55), the fixing rod (59) is installed on the inner wall of the protective base (1), the locking rod (510) is installed on the gear (31), and the second spring (511) is installed between the fixing rod (59) and the locking rod (510).

4. The safety locking device of the ring main unit according to claim 3 is characterized in that: An arc-shaped joint (561) is installed on the locking block (56).

5. The safety locking device of the ring main unit according to claim 1, characterized in that: The protective base (1) is provided with a viewing window (10), a fixing seat (11) is installed in the viewing window (10), a rotating ball (12) is installed on the fixing seat (11), and a pull rod (121) is installed through the rotating ball (12).

6. A method for using a safety locking device of a ring main unit, characterized in that: The implementation of the method relies on the safety locking device of the ring main unit according to any one of claims 1 to 5 above, and comprises the following steps: Pull the pull rod (121) to press the circuit breaker switch; Taking the clamping rod (65) out of the second limiting cavity (63), rotating the clamping rod (65) and inserting the clamping rod (65) into the first limiting cavity (62); The rotating disk (2) is rotated to rotate the gear (31) together, thereby causing the bracket (32) to move downward, and the connecting seat (41) is moved downward by pulling the connecting rod (34) and the driving rod (35), causing the rotating rod (42) to rotate and the locking rod (43) to move toward the inner cavity of the protective base (1); The bracket (32) moves downward, and the second rack (8) drives the gear ring (7) to rotate, thereby causing one of the rotating bases (61) to drive the insulating rod (64), the clamping rod (65), and the wrench (66) located at the top to rotate together, thereby completing the work of pulling off the isolation knife switch, and then the second rack (8) drives the other gear ring (7) to rotate, thereby using the other rotating base (61) to rotate, thereby completing the work of closing the grounding knife switch; The rotating disk (2) is rotated completely and the locking rod (43) is completely retracted into the protective base (1).

7. The method for using the safety locking device of the ring main unit according to claim 6, characterized in that: The following steps are also included: When the rotating disk (2) rotates, the locking rod (510) moves in a circular motion and leaves the first locking groove (53), and the second spring (511) is stretched; The locking rod (510) contacts the arc-shaped joint (561) and pushes the locking block (56) upward, while stretching the first spring (58); when the locking rod (510) is inserted into the second slot (57), the locking block (56) is reset, and the locking rod (510) is limited by the tension of the first spring (58).

8. A ring main unit, characterized in that: The safety locking device of the ring main unit comprises the safety locking device of any one of claims 1 to 7, and further comprises a cabinet body (13), a slide rail (14), a pulley (15) and a cabinet door (16), wherein the slide rail (14) is mounted on the upper surface of the cabinet body (13), the pulley (15) is mounted on the protective base (1), and the pulley (15) is snap-connected with the slide rail (14), and the cabinet door (16) is hinged to the cabinet body (13), and the cabinet door corresponds to the position of the protective base (1).

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