Closing gate defense device of high-voltage distribution box and closing gate method of closing gate defense device

Abstract

The invention discloses a closing gate defense device of a high-voltage distribution box and a closing gate method of the closing gate defense device. The closing gate defense device of the high-voltage distribution box comprises a hinge box installed on a box door of the high-voltage distribution box. Comprising an insulating and flame-retardant inner side lever; an inner bevel gear is arranged at one end of the inner side lever, and the circle center of the inner bevel gear is hinged into the hinge box; the other end of the inner side lever is hinged with a closing operation handle in the high-voltage distribution box through a connecting piece, and comprises an insulating and flame-retardant outer side lever; an outer bevel gear is arranged at one end of the outer side lever, the circle center of the outer bevel gear is hinged to the interior of the hinge box, and the outer bevel gear is meshed with the inner bevel gear; the other end of the outer side lever extends towards the rear side of the high-voltage distribution box body, the outer side lever is pulled upwards in the longitudinal direction, and the inner bevel gear is driven to rotate through the outer bevel gear. According to the invention, the impact force generated by electrical explosion is guided to the right front side or the lateral front side of the box body, so that the casualty probability is greatly reduced, and the safety level of switching-on operation is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of large-scale power grid safety, and in particular, relates to a closing gate defense device for a high-voltage distribution box and a closing gate method thereof. Background Art

[0002] High-voltage distribution box is one of the common equipment in power grid facilities. It plays the role of on-off, control or protection in power generation, transmission, distribution, power conversion and consumption of power system. Its internal parts mainly include high-voltage circuit breakers, high-voltage disconnectors and grounding switches, high-voltage load switches, high-voltage operating mechanisms, high-voltage explosion-proof distribution devices, high-voltage switch cabinets and other categories. The high-voltage distribution box itself plays a protective role, but when closing the gate, the high-voltage distribution box is the most dangerous place. The specific reason is that before closing the gate, it is necessary to check whether there are faults in the line and equipment in advance. Under normal circumstances, the equipment and lines are normal, and there is no danger in closing the gate. However, the investigation is done manually and cannot be foolproof. In addition, potential problems such as short circuits caused by aging of line equipment, failure of protection devices, and humid environment cannot be discovered in time by investigation alone. If any of the above faults or other faults occur, the circuit breaker, disconnector or contactor in the high-voltage distribution box will cause arc faults under the impact of strong current at the moment of closing the gate, forming a strong explosion wave, causing serious damage to surrounding personnel and equipment.

[0003] In order to improve the protection of personnel, some existing high-voltage distribution boxes are equipped with automatic closing devices such as delayed closing and intelligent closing, which do not require electrical engineers to manually close the gate. However, not all high-voltage distribution boxes are equipped with automatic devices. For example, they are affected by equipment cost reasons, limitations on the update of existing equipment, safety redundancy and reliability assurance, etc. In addition, in terms of flexibility and on-site judgment requirements, automatic closing devices are not as good as manual closing. High-voltage distribution boxes with manual closing have strict personal closing requirements: insulating gloves, insulating shoes, insulating pads, and hand-held insulating rods must be worn, and you should stand on the side of the operating surface (towards the front of the high-voltage distribution box) when closing. It is generally recommended to stand sideways at an angle of at least 45° to the operating surface to reduce the area facing the operating surface and reduce the probability of eye damage and facial burns.

[0004] The existing manual closing operation specifications are quite complete. In small current accidents, as long as the operator closes the switch according to the specifications, the probability of injury is not high. However, high-voltage distribution boxes usually have large loads and currents. Even if they are operated in full accordance with the closing specifications, once an electrical explosion occurs, people and objects standing in front of and to the front of the high-voltage distribution box will be injured to varying degrees. However, due to the obstruction of the box itself, the safety factors of the right, left and rear sides of the high-voltage distribution box are much higher than those of the front and front directions. Therefore, the existing high-voltage distribution box lacks a defense device and a closing method that can be used to close the gate on the side of the box to further reduce the probability of injury to personnel during the closing process. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a closed gate defense device for a high-voltage distribution box, comprising a hinged box installed on a door of the high-voltage distribution box, and the opening angle of the door is not less than 110°; comprising an insulating and flame-retardant inner lever; one end of the inner lever is provided with an inner bevel gear, and the center of the inner bevel gear is hinged in the hinged box; the other end of the inner lever is hinged to a closing operating handle in the high-voltage distribution box through a connecting piece, comprising an insulating and flame-retardant outer lever; one end of the outer lever is provided with an outer bevel gear, the center of the outer bevel gear is hinged in the hinged box and the outer bevel gear is meshed with the inner bevel gear; the other end of the outer lever extends toward the rear side of the high-voltage distribution box body, the outer lever is bent upward in the longitudinal direction, the inner bevel gear is driven to rotate by the outer bevel gear, and then the inner lever drives the closing operating handle to swing upward, or the outer lever is bent downward in the longitudinal direction, the inner bevel gear is driven to rotate by the outer bevel gear, and then the inner lever drives the closing operating handle to swing downward.

[0006] The beneficial effects of the closing gate defense device of the high-voltage distribution box of the present invention are:

[0007] 1. The inner lever and the outer lever replace the existing insulating rod. The inner lever, the outer lever and the closing operating handle have formed an articulated relationship with a unique articulation direction, which solves the difficult operation of aiming the closing operating handle with the insulating rod held at a long distance, making the closing operation more convenient.

[0008] 2. Although the power arm of the inner lever is smaller than the resistance arm, the power arm of the outer lever is larger than the resistance arm. The power arm of the outer lever is longer and is supported by the hinge box. When closing the switch, you only need to push up or down the end of the outer lever, which is more labor-saving than using an insulating rod to directly pry the closing operating handle.

[0009] 3. It is not restricted by the structure of the high-voltage distribution box. It only needs to install the hinged box on the box door. It can be applied to existing equipment without replacing the existing equipment. It improves the closing safety factor without increasing the cost of updating the equipment.

[0010] 4. The entire closing gate defense device has no electrical parts and only adopts a mechanical transmission structure. It is not affected by the electromagnetic field of the distribution box. Compared with remote closing, intelligent closing and other electric closing systems, it has a lower failure rate and higher reliability.

[0011] Preferably, the connecting member includes a socket adapted to the closing operating handle and an articulated seat connected to the rear side of the socket, and the socket is detachably connected to the closing operating handle through a bolt; the other end of the inner lever is articulated to the articulated seat through a latch and the inner lever can swing up and down relative to the articulated seat. In addition, the inner lever and the articulated seat are articulated through a telescopic rod, one end of the telescopic rod is articulated to the articulated seat, and the other end of the telescopic rod extends into the telescopic hole at the end of the inner lever, thereby forming a telescopic structure with the inner lever. The socket is sleeved on the outside of the closing operating handle, and the closing operating handle and the socket are fixed with the screws or screws of the socket, and the articulated seat forms an articulated relationship with the telescopic rod. In the process of the telescopic rod prying the closing operating handle to swing, the telescopic rod and the articulated seat automatically adjust the motion relationship between the inner lever and the socket, so that the swing direction of the inner lever is unique.

[0012] Preferably, the hinge box can be detachably installed in the ammeter installation square hole or voltmeter installation square hole of the box door, and the inner cavity of the hinge box passes through the inner wall and outer wall of the hinge box respectively; two hinge shafts are arranged inside the hinge box, and the center of the inner bevel gear and the center of the outer bevel gear are respectively hingedly connected with the two hinge shafts in a one-to-one correspondence; the inner lever and the outer lever extend from the inner side and the outer side of the hinge box respectively, and insulating flame-retardant sealing rubber sleeves are respectively provided between the inner side of the hinge box and the inner lever, and between the outer side of the hinge box and the outer lever. The size of the hinge box is compatible with the existing installation square hole, and the hinge box adopts a detachable connection. The closed gate defense device can be applied to most high-voltage distribution boxes. After the closing is completed, the closed gate defense device can be removed by removing the hinge box and the plug sleeve, and the disassembly and assembly operation is simple.

[0013] Preferably, the minimum distance between the tooth top circle of the outer bevel gear and the tooth top circle of the inner bevel gear is 2-6 mm. The outer bevel gear and the inner bevel gear cannot mesh directly, and a one-way meshing relationship is formed between the two through the lower tooth sleeve or the upper tooth sleeve. The purpose of the one-way meshing is to avoid the transmission relationship between the inner lever and the outer lever hindering the tripping and expanding the electrical accident.

[0014] Most of the closing operations are done by pushing the closing handle upwards. For this type of upper closing, each tooth of the outer bevel gear is positively meshed with the teeth of the outer bevel gear through the lower tooth sleeve. All lower tooth sleeves have the same structure. Each lower tooth sleeve covers the lower half of the tooth surface of the corresponding tooth along the tooth width direction, and the upper side of each lower tooth sleeve extends in the tooth height direction to form a tooth top that positively meshes with the teeth of the inner bevel gear; the tooth top of each lower tooth sleeve is provided with a fillet; each lower tooth sleeve and the corresponding lower half of the tooth surface can be detachably connected, and the tooth top of each lower tooth sleeve can be elastically bent in the reverse meshing direction.

[0015] In addition, a small number of closing operations are performed by pushing the closing operating handle downward. For this type of lower closing operation, each tooth of the outer bevel gear is reversely meshed with the tooth of the outer bevel gear through the upper tooth sleeve. Preferably, all upper tooth sleeves have the same structure, each upper tooth sleeve covers the upper half tooth surface of the corresponding tooth along the tooth width direction, and the upper edge of each upper tooth sleeve extends in the tooth height direction to form a tooth top that reversely meshes with the tooth of the inner bevel gear; each upper tooth sleeve has a rounded corner on its tooth top; each upper tooth sleeve is detachably connected to the corresponding upper half tooth surface, and each tooth top of the upper tooth sleeve can be elastically bent in the positive meshing direction.

[0016] The present invention also provides a closing method for a high-voltage distribution box, based on the above-mentioned closing device for a high-voltage distribution box, the steps are as follows:

[0017] S1. Open the door of the high-voltage distribution box with an opening angle of not less than 110°. Add a support rod between the door and the box body or add a fixed object behind the door to prevent the door from swinging backwards. Install the hinge box in the square hole for installing the ammeter or voltmeter reserved in the door.

[0018] S2, the socket of the connector is connected to the closing operating handle by bolts;

[0019] S3. The closing personnel stands at the rear side of the box, holding the end of the outer lever or connecting to the end of the outer lever through an extension rod;

[0020] S4. If the closing direction is upward, install the lower tooth sleeve on the gear teeth of the outer bevel gear. After the lower tooth sleeve is installed, the closing personnel pushes the outer lever upward, the outer bevel gear rotates forward, the lower tooth sleeve of the outer bevel gear meshes with the inner bevel gear, and the inner bevel gear rotates forward to make the telescopic rod of the outer lever extend adaptively and pry the closing operating handle to swing upward to close the switch;

[0021] S401. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle drives the inner bevel gear to rotate in the opposite direction through the inner lever, the inner bevel gear squeezes the tooth top of the lower tooth sleeve, the tooth top of the lower tooth sleeve bends in the opposite direction, and the inner bevel gear and the outer bevel gear are separated in the opposite direction, the outer bevel gear does not rotate accordingly with the rotation of the inner bevel gear, and the closing fails;

[0022] S5. If the closing direction is downward, install the upper tooth sleeve on the gear teeth of the outer bevel gear. After the upper tooth sleeve is installed, the closing personnel pushes the outer lever downward, the outer bevel gear rotates in the opposite direction, the upper tooth sleeve of the outer bevel gear meshes with the inner bevel gear, and the inner bevel gear rotates in the opposite direction to make the telescopic rod of the outer lever extend adaptively and pry the closing operating handle to swing downward to close the switch;

[0023] S501. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle drives the inner bevel gear to rotate forward through the inner lever, the inner bevel gear squeezes the tooth top of the upper tooth sleeve, the tooth top of the upper tooth sleeve bends forward, and the inner bevel gear and the outer bevel gear are positively separated, the outer bevel gear does not rotate accordingly with the rotation of the inner bevel gear, and the closing fails.

[0024] The closing method of the high-voltage distribution box of the present invention has the following advantages:

[0025] 1. The position of the closing personnel is staggered from the impact direction of the explosion wave, which makes up for the defect that the existing manual closing method cannot avoid casualties of the closing personnel caused by electrical explosion.

[0026] 2. When closing the circuit breaker, the operator stands on the side or rear of the box. If an electrical accident occurs, the box can be used as a shelter to direct the impact force generated by the electrical explosion to the front or side of the box, thereby greatly reducing the probability of casualties and improving the safety level of the closing operation.

[0027] 3. The entire closing method is closely related to the closing gate defense device. Each step is connected before and after. Even if the sequence of steps is wrong, it will not affect the protection effect and has a high fault tolerance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the closing gate defense device of the high-voltage distribution box in the present invention;

[0030] Figure 2 for Figure 1 The three-dimensional Figure 1 ;

[0031] Figure 3 for Figure 1 The three-dimensional Figure 2 ;

[0032] Figure 4 for Figure 1 The three-dimensional Figure 3 ;

[0033] Figure 5 for Figure 4 Enlarged view of point A in the middle

[0034] Figure 6 It is a schematic diagram of the internal structure of the hinge box in the present invention;

[0035] Figure 7 for Figure 6 A partial enlarged view of

[0036] Figure 8 for Figure 7 Schematic diagram of the cross section of the inner bevel gear;

[0037] Fig. 9 for Figure 8 The enlarged view of point B in the middle;

[0038] Fig.10 for Fig. 9 Schematic diagram of the inner bevel gear after reverse rotation;

[0039] Fig.11 This is a schematic diagram of the outer bevel gear after the upper tooth sleeve is installed in the present invention.

[0040] Figure numerals: box body 1, box door 2, installation square hole 3, hinge box 4, inner lever 5, outer lever 6, inner bevel gear 7, connecting piece 8, sleeve 9, hinge seat 10, telescopic rod 11, closing operating handle 12, outer bevel gear 13, extension rod 14, anti-slip foam tube 15, hinge shaft 16, insulating flame retardant sealing rubber sleeve 17, lower tooth brace 18, tooth top 19, upper tooth brace 20. DETAILED DESCRIPTION

[0041] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0042] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Embodiment 1;

[0045] like Figures 1 to 4 As shown, as shown, embodiment 1 provides a closed gate defense device for a high-voltage distribution box, including a hinged box 4 installed on the door 2 of the high-voltage distribution box, an insulating and flame-retardant inner lever 5, and an insulating and flame-retardant outer lever 6. Among them, the opening angle of the door 2 is not less than 110°. The hinged box 4 can be detachably installed at the ammeter installation square hole 3 or the voltmeter installation square hole 3 of the door 2, and the hinged box 4 can be connected to the door 2 by an inlay connection method, a bolt connection method, a snap connection method, etc. to form a detachable connection structure. In order to make the existing door 2 meet the installation requirements, a separate installation square hole 3 can be opened on the door 2, and the spare ammeter or voltmeter can also be removed to free up the installation square hole 3. When not in use, a baffle, a plug, etc. that is compatible with the installation square hole 3 can be used to cover the installation square hole 3. The materials of the inner lever 5 and the outer lever 6 can be inorganic materials, such as ceramics, glass, etc., or organic polymer materials, such as epoxy resin, phenolic resin, etc., or composite materials, such as glass fiber reinforced plastic. The specific materials of the inner lever 5 and the outer lever 6 are not limited in this embodiment, as long as they meet the requirements of insulation and flame retardancy and have a certain torsional strength.

[0046] The specific structure and connection relationship of the inner lever 5 in this embodiment are as follows:

[0047] like Figure 4 , Figure 5 and Figure 6As shown, an inner bevel gear 7 is provided at one end of the inner lever 5. The inner bevel gear 7 and the inner lever 5 can be integrally formed, or they can be manufactured independently and then fixedly connected through a secondary process. The fixed connection method is determined according to the material of the inner bevel gear 7 and the material of the inner lever 5 and the difficulty of the manufacturing process. The center of the inner bevel gear 7 is hinged in the hinge box 4. When the box door 2 is opened, the other end of the inner lever 5 bends and extends toward the inside of the box, and the other end of the inner lever 5 is hinged to the closing operating handle 12 in the high-voltage distribution box through a connecting member 8. Specifically, the connecting member 8 includes a socket 9 adapted to the closing operating handle 12 and an articulated seat 10 connected to the rear side of the socket 9. The socket 9 is detachably connected to the closing operating handle 12 through bolts; the other end of the inner lever 5 is hinged to the articulated seat 10 through a latch and the inner lever 5 can swing up and down relative to the articulated seat 10. In addition, the inner lever 5 is hinged to the articulated seat 10 through a telescopic rod 11, one end of the telescopic rod 11 is hinged to the articulated seat 10, and the other end of the telescopic rod 11 extends into the telescopic hole at the end of the inner lever 5, so that the telescopic rod 11 and the inner lever 5 form a telescopic structure. The plug sleeve 9 is sleeved on the outside of the closing operating handle 12, and the closing operating handle 12 and the plug sleeve 9 are fixed with the screws or jackscrews of the plug sleeve 9, and the articulated seat 10 and the telescopic rod 11 form an articulated relationship. In the process of the telescopic rod 11 prying the closing operating handle 12 to swing, the telescopic rod 11 and the articulated seat 10 automatically adjust the motion relationship between the inner lever 5 and the plug sleeve 9, so that the swing direction of the inner lever 5 is unique.

[0048] The specific structure and connection relationship of the outer lever 6 in this embodiment are as follows:

[0049] like Figure 3 , Figure 4 and 6As shown, an outer bevel gear 13 is provided at one end of the outer lever 6. Similarly, the outer bevel gear 13 and the outer lever 6 can be integrally formed, or they can be independently manufactured and then fixedly connected through a secondary process. The center of the outer bevel gear 13 is hinged in the hinge box 4 and the outer bevel gear 13 is meshed with the inner bevel gear 7. The other end of the outer lever 6 extends toward the rear side of the high-voltage distribution box body 1, and an extension rod 14 can also be added to the end of the outer lever 6, depending on the actual situation and the use environment. In order to facilitate holding, an anti-slip foam tube 15 can be added to the end of the extension rod 14. In addition, two hinge shafts 16 are provided inside the hinge box 4 in this embodiment, and the inner cavity of the hinge box 4 passes through the inner wall and the outer wall of the hinge box 4 respectively. The center of the inner bevel gear 7 and the center of the outer bevel gear 13 are respectively hingedly connected with two hinge shafts 16 in one-to-one correspondence; the inner lever 5 and the outer lever 6 extend from the inner side and the outer side of the hinge box 4 respectively, and an insulating flame-retardant sealing rubber sleeve 17 is respectively sleeved between the inner side of the hinge box 4 and the inner lever 5 and between the outer side of the hinge box 4 and the outer lever 6. The size of the hinge box 4 is adapted to the existing installation square hole 3, and the hinge box 4 adopts a detachable connection. The closed gate defense device can be applied to most high-voltage distribution boxes. After the closing is completed, the closed gate defense device can be removed by removing the hinge box 4 and the plug sleeve 9, and the disassembly and assembly operation is simple.

[0050] like Figures 6 to 9As shown, in fact, the outer bevel gear 13 and the inner bevel gear 7 in this embodiment are not directly meshed. In fact, the minimum distance between the tooth top 19 circle of the outer bevel gear 13 and the tooth top 19 circle of the inner bevel gear 7 is L, and L can be 2mm, 3mm, etc., and the maximum does not exceed 6mm. The outer bevel gear 13 and the inner bevel gear 7 cannot be directly meshed, but a lower tooth sleeve 18 or an upper tooth sleeve 20 is added between the two to form a one-way meshing relationship. The purpose of the one-way meshing is to avoid the transmission relationship between the inner lever 5 and the outer lever 6 hindering the tripping and expanding the electrical accident. The reason why the specific value of L is controlled below 6mm is that within the spacing range of 6mm, the lower tooth sleeve 18 itself can withstand the positive shear force between the outer bevel gear 13 and the inner bevel gear 7. Similarly, the upper tooth sleeve 20 itself can also withstand the reverse shear force between the outer bevel gear 13 and the inner bevel gear 7. If the value of L increases, the shear force may cut off the lower tooth sleeve 18 or the upper tooth sleeve 20. Therefore, under the shear force that the lower toothed sleeve 18 and the upper toothed sleeve 20 can withstand, when closing the switch, the outer lever 6 is bent in the longitudinal direction, and the inner bevel gear 7 is driven to rotate through the outer bevel gear 13, so that the inner lever 5 drives the closing operating handle 12 to swing upward. This operation is used for the upper closing situation. Each gear tooth of the outer bevel gear 13 is positively meshed with the gear teeth of the outer bevel gear 13 through the lower toothed sleeve 18. All lower toothed sleeves 18 have the same structure. Each lower toothed sleeve 18 covers the lower half tooth surface of the corresponding gear tooth along the tooth width direction, and the upper side of each lower toothed sleeve 18 extends in the tooth height direction to form a tooth top 19 that is positively meshed with the gear teeth of the inner bevel gear 7; the tooth top 19 of each lower toothed sleeve 18 is provided with a rounded corner; each lower toothed sleeve 18 and the corresponding lower half tooth surface can be detachably connected, and the tooth top 19 of each lower toothed sleeve 18 can be elastically bent in the reverse meshing direction.

[0051] The outer lever 6 can be moved downward in the longitudinal direction, and the inner bevel gear 7 can be driven to rotate through the outer bevel gear 13, so that the inner lever 5 drives the closing operating handle 12 to swing downward. Fig.11 As shown, for this type of lower closing situation, each gear tooth of the outer bevel gear 13 is reversely meshed with the gear teeth of the outer bevel gear 13 through the upper gear sleeve 20. Preferably, all upper gear sleeves 20 have the same structure, each upper gear sleeve 20 covers the upper half tooth surface of the corresponding gear tooth along the tooth width direction, and the upper side of each upper gear sleeve 20 extends in the tooth height direction to form a tooth top 19 that is reversely meshed with the gear teeth of the inner bevel gear 7; the tooth top 19 of each upper gear sleeve 20 is provided with a fillet; each upper gear sleeve 20 is detachably connected to the corresponding upper half tooth surface, and the tooth top 19 of each upper gear sleeve 20 can be elastically bent in the positive meshing direction.

[0052] The closing gate defense device provided in this embodiment is applicable regardless of whether the switch is closed upward or downward.

[0053] Embodiment 2:

[0054] Embodiment 2 provides a closing method for a high-voltage distribution box, based on the closing device for a high-voltage distribution box of embodiment 1, and the method is as follows:

[0055] First, complete the following installation steps: open the door 2 of the high-voltage distribution box, the opening angle is not less than 110°, add a support rod between the door 2 and the box body 1 or add a fixed object behind the door 2 to prevent the door 2 from swinging backwards, and then install the hinge box 4 in the ammeter installation square hole 3 or the voltmeter installation square hole 3 reserved in the door 2. Then connect the socket 9 of the connector 8 to the closing operating handle 12 by bolts.

[0056] Then the best closing position is selected: the closing person stands at the rear side of the box body 1 and holds the end of the outer lever 6 or is connected to the end of the outer lever 6 through the extension rod 14.

[0057] Finally, select the closing direction:

[0058] If the closing direction is upward, Figure 7 As shown, the lower tooth sleeve 18 is installed on the gear teeth of the outer bevel gear 13. After the lower tooth sleeve 18 is installed, the closing personnel pushes the outer lever 6 upward, the outer bevel gear 13 rotates forward, the lower tooth sleeve 18 of the outer bevel gear 13 meshes with the inner bevel gear 7, and the inner bevel gear 7 rotates forward to make the telescopic rod 11 of the outer lever 6 extend adaptively and pry the closing operating handle 12 to swing upward to close the switch. Figure 6 As shown, Figure 6 F1 indicates the force direction of the closing personnel, and F2 indicates the swing direction of the closing operating handle 12. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle 12 drives the inner bevel gear 7 to rotate in the opposite direction through the inner lever 5, and the inner bevel gear 7 squeezes the tooth top 19 of the lower tooth sleeve 18, and the tooth top 19 of the lower tooth sleeve 18 bends in the opposite direction, thereby causing the inner bevel gear 7 to separate from the outer bevel gear 13 in the opposite direction, and the outer bevel gear 13 does not rotate accordingly with the rotation of the inner bevel gear 7, and the closing fails.

[0059] If the closing direction is downward, Fig.11As shown, the upper tooth sleeve 20 is installed on the gear teeth of the outer bevel gear 13. After the upper tooth sleeve 20 is installed, the closing personnel pushes the outer lever 6 downward, the outer bevel gear 13 rotates in the opposite direction, the upper tooth sleeve 20 of the outer bevel gear 13 meshes with the inner bevel gear 7, and the inner bevel gear 7 rotates in the opposite direction to make the telescopic rod 11 of the outer lever 6 extend adaptively and pry the closing operating handle 12 to swing downward to close the switch. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle 12 drives the inner bevel gear 7 to rotate forward through the inner lever 5, the inner bevel gear 7 squeezes the tooth top 19 of the upper tooth sleeve 20, and the tooth top 19 of the upper tooth sleeve 20 is bent forward, thereby separating the inner bevel gear 7 from the outer bevel gear 13 in the positive direction, and the outer bevel gear 13 does not rotate accordingly with the rotation of the inner bevel gear 7, and the closing fails.

[0060] The closing method provided in this embodiment can guide the impact force generated by the electrical explosion to the front or side of the box 1 in the event of an electrical explosion or other accidents, while the operators standing on the side or rear of the box 1 are protected by the box 1 and the door 2, thereby greatly reducing the probability of casualties and improving the safety level of the closing operation.

[0061] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A closed gate defense device for a high voltage distribution box, characterized in that: It comprises a hinge box (4) installed on a door (2) of a high-voltage distribution box, and the opening angle of the door (2) is not less than 110°; The invention comprises an insulating and flame-retardant inner lever (5); one end of the inner lever (5) is provided with an inner bevel gear (7), and the center of the inner bevel gear (7) is hinged in a hinge box (4); the other end of the inner lever (5) is hinged to a closing operating handle (12) in a high-voltage distribution box through a connecting piece (8). The invention comprises an insulating and flame-retardant outer lever (6); one end of the outer lever (6) is provided with an outer bevel gear (13); the center of the outer bevel gear (13) is hinged in a hinge box (4) and the outer bevel gear (13) is meshed with an inner bevel gear (7); the other end of the outer lever (6) extends toward the rear side of a high-voltage distribution box body (1); the outer lever (6) is moved in the longitudinal direction to drive the inner bevel gear (7) to rotate through the outer bevel gear (13), thereby causing the inner lever (5) to drive the closing operating handle (12) to swing upward; or the outer lever (6) is moved in the longitudinal direction to drive the inner bevel gear (7) to rotate through the outer bevel gear (13), thereby causing the inner lever (5) to drive the closing operating handle (12) to swing downward.

2. The closed gate defense device of a high-voltage distribution box according to claim 1 is characterized in that: The connecting member (8) comprises a socket (9) adapted to the closing operating handle (12) and an articulated seat (10) connected to the rear side of the socket (9); the socket (9) is detachably connected to the closing operating handle (12) via bolts; the other end of the inner lever (5) is articulated to the articulated seat (10) via a latch and the inner lever (5) can swing up and down relative to the articulated seat (10).

3. The closed gate defense device of a high-voltage distribution box according to claim 2 is characterized in that: The inner lever (5) and the hinge seat (10) are hinged via a telescopic rod (11), one end of the telescopic rod (11) is hinged to the hinge seat (10), and the other end of the telescopic rod (11) extends into a telescopic hole at the end of the inner lever (5), thereby forming a telescopic structure with the inner lever (5).

4. The closed gate defense device of a high-voltage distribution box according to claim 3 is characterized in that: The hinge box (4) can be detachably installed in the ammeter installation square hole (3) or the voltmeter installation square hole (3) of the box door (2), and the inner cavity of the hinge box (4) passes through the inner wall and the outer wall of the hinge box (4) respectively; two hinge shafts (16) are arranged inside the hinge box (4), and the center of the circle of the inner bevel gear (7) and the center of the circle of the outer bevel gear (13) are respectively hingedly connected to the two hinge shafts (16) in a one-to-one correspondence; the inner lever (5) and the outer lever (6) extend from the inner side and the outer side of the hinge box (4) respectively, and insulating flame-retardant sealing rubber sleeves (17) are respectively provided between the inner side of the hinge box (4) and the inner lever (5) and between the outer side of the hinge box (4) and the outer lever (6).

5. The closed gate defense device of a high-voltage distribution box according to claim 4 is characterized in that: The minimum distance between the tooth top (19) circle of the outer bevel gear (13) and the tooth top (19) circle of the inner bevel gear (7) is 2-6 mm.

6. The closed gate defense device of a high-voltage distribution box according to claim 5, characterized in that: Each gear tooth of the outer bevel gear (13) is positively meshed with the gear teeth of the outer bevel gear (13) via a lower tooth sleeve (18).

7. The closed gate defense device of a high-voltage distribution box according to claim 6, characterized in that: All lower tooth sleeves (18) have the same structure. Each lower tooth sleeve (18) covers the lower half tooth surface of the corresponding gear tooth along the tooth width direction, and the upper side of each lower tooth sleeve (18) extends in the tooth height direction to form a tooth top (19) that is positively meshed with the gear teeth of the inner bevel gear (7); the tooth top (19) of each lower tooth sleeve (18) is provided with a rounded corner; each lower tooth sleeve (18) and the corresponding lower half tooth surface can be detachably connected, and the tooth top (19) of each lower tooth sleeve (18) can be elastically bent in the reverse meshing direction.

8. The closed gate defense device of a high-voltage distribution box according to claim 5, characterized in that: Each gear tooth of the outer bevel gear (13) is reversely meshed with the gear teeth of the outer bevel gear (13) via an upper gear sleeve (20).

9. The closed gate defense device of a high-voltage distribution box according to claim 8, characterized in that: All upper tooth sleeves (20) have the same structure. Each upper tooth sleeve (20) covers the upper half tooth surface of the corresponding gear tooth along the tooth width direction, and the upper side of each upper tooth sleeve (20) extends in the tooth height direction to form a tooth top (19) that meshes with the gear teeth of the inner bevel gear (7) in the opposite direction. The tooth top (19) of each upper tooth sleeve (20) is provided with a rounded corner. Each upper tooth sleeve (20) is detachably connected to the corresponding upper half tooth surface, and the tooth top (19) of each upper tooth sleeve (20) can be elastically bent in the positive meshing direction.

10. A closing method for a high voltage distribution box, characterized in that: A closed gate defense device for a high-voltage distribution box according to claim 7 or 9, the steps are as follows: S1. Open the door (2) of the high-voltage distribution box to an opening angle of not less than 110°, and install the hinge box (4) in the square hole (3) for installing the ammeter or the square hole (3) for installing the voltmeter reserved in the door (2); S2, the socket (9) of the connecting member (8) is connected to the closing operating handle (12) by means of bolts; S3, the closing person stands at the rear side of the box body (1), and holds the end of the outer lever (6) or connects to the end of the outer lever (6) through an extension rod (14); S4. If the closing direction is upward, a lower tooth sleeve (18) is installed on the gear teeth of the outer bevel gear (13). After the lower tooth sleeve (18) is installed, the closing personnel pushes the outer lever (6) upward, the outer bevel gear (13) rotates forward, the lower tooth sleeve (18) of the outer bevel gear (13) meshes with the inner bevel gear (7), and the inner bevel gear (7) rotates forward to make the telescopic rod (11) of the outer lever (6) extend adaptively and pry the closing operating handle (12) to swing upward to close the switch; S401. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle (12) drives the inner bevel gear (7) to rotate in the opposite direction through the inner lever (5), the inner bevel gear (7) squeezes the tooth top (19) of the lower tooth sleeve (18), and the tooth top (19) of the lower tooth sleeve (18) bends in the opposite direction, thereby causing the inner bevel gear (7) to separate from the outer bevel gear (13) in the opposite direction, and the outer bevel gear (13) does not rotate accordingly with the rotation of the inner bevel gear (7), and the closing fails; S5. If the closing direction is downward, an upper toothed sleeve (20) is installed on the gear teeth of the outer bevel gear (13). After the upper toothed sleeve (20) is installed, the closing personnel pushes the outer lever (6) downward, the outer bevel gear (13) rotates in the opposite direction, the upper toothed sleeve (20) of the outer bevel gear (13) meshes with the inner bevel gear (7), and the inner bevel gear (7) rotates in the opposite direction to make the telescopic rod (11) of the outer lever (6) extend adaptively and pry the closing operating handle (12) to swing downward to close the switch; S501. If no tripping occurs during closing, the closing is successful; if tripping occurs during closing, the closing operating handle (12) drives the inner bevel gear (7) to rotate in the positive direction through the inner lever (5), the inner bevel gear (7) squeezes the tooth top (19) of the upper tooth sleeve (20), and the tooth top (19) of the upper tooth sleeve (20) bends in the positive direction, thereby causing the inner bevel gear (7) to separate from the outer bevel gear (13) in the positive direction, and the outer bevel gear (13) does not rotate accordingly with the rotation of the inner bevel gear (7), and the closing fails.

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