A disconnector with a protective structure

Abstract

The application discloses a disconnecting switch with a protection structure and belongs to the technical field of disconnecting switches. The disconnecting switch with the protection structure comprises a protective box body for assisting in mounting the disconnecting switch, two groups of post insulators which are obliquely and rotatably installed on the protective box body, a conductive arm assembly which is arranged between the two groups of post insulators and is used for realizing closing and opening actions, a power assembly which is arranged in the protective box body and is used for driving the two groups of post insulators to synchronously and reversely rotate, and a first protection mechanism which is arranged in the protective box body and is used for locking an opening state of the conductive arm assembly. A rocker which is used for being connected with a grounding switch is rotatably installed on the outside of the protective box body, and a second protection mechanism which is used for locking an opening state of the rocker is arranged on a sleeve ring. The sleeve ring is axially slided to realize linkage switching of the first protection mechanism and the second protection mechanism, realize bidirectional mechanical interlocking of a main knife switch of the disconnecting switch and a grounding knife switch, and avoid the risk of misoperations such as closing the grounding knife switch while being electrified and closing the switch while being grounded.

Description

Technical Field

[0001] This invention relates to the field of disconnecting switch technology, specifically to a disconnecting switch with a protective structure. Background Technology

[0002] High-voltage disconnect switches are core switching equipment in power transmission and distribution systems, widely used in substations, distribution lines, and other scenarios. They are mainly used to connect and disconnect circuits under no-load conditions, ensuring the safe conduct of equipment maintenance and line operation and maintenance. The mainstream GW5 type outdoor high-voltage disconnect switch completes the opening and closing actions by driving the conductive arm assembly. To meet the on-site grounding protection requirements, a grounding knife switch and a corresponding operating rocker arm are generally installed on the outside of the equipment to realize the line grounding operation.

[0003] For example, patent CN115692083A discloses a fully sealed disconnect switch. The overall structure adopts a three-phase box structure with high-voltage bushings for inlet and outlet lines, a fully sealed shell, and is filled with SF6 gas. The disconnect switch is located in the middle of the tank, with a horizontal break and external opening and closing indicators. Grounding switch modules can be selected at both ends of the tank to achieve single and double grounding requirements. According to user requirements, current transformers, surge arresters and other equipment can be added to form an open-type combined electrical appliance. The disconnect switch is equipped with electric and manual operating mechanisms to realize opening and closing operations.

[0004] For example, patent CN119601410B discloses a disconnecting switch, which includes a disconnecting switch body and an electric operating mechanism. The disconnecting switch body includes a bracket and a first rotating shaft for driving the disconnecting switch body to open and close. The first rotating shaft is rotatably disposed on opposite sides of the bracket. The electric operating mechanism includes a housing and an electric drive module. The housing is installed on one side of the bracket, and the electric drive module is installed inside the housing. The electric drive module includes a drive component and a transmission shaft. The first end of the transmission shaft is connected to the output end of the drive component, and the second end is rotatably and sealed through the housing and detachably connected to the corresponding first rotating shaft. The drive component drives the first rotating shaft to rotate by driving the transmission shaft to rotate.

[0005] For example, patent CN216120045U discloses a high-voltage disconnecting switch, which includes two insulating columns spaced apart. Each insulating column is provided with a contact, and each contact is connected to a terminal block. The contact is also connected to an opening and closing mechanism for controlling the opening or closing of the two contacts. The opening and closing of the high-voltage disconnecting switch is achieved by opening and closing the two contacts. The outer wall of the contact and the outer wall of the part that contacts the contact are provided with a graphite silver-plated layer. The graphite silver-plated layer has good conductivity and lubrication properties. The disconnecting switch in operation does not need to be coated with lubricant, thus avoiding the adhesion and accumulation of a large amount of sand and dust. This achieves the effect of reducing the electrical contact resistance and mechanical resistance of the disconnecting switch and reducing the wear of the silver-plated layer, thereby improving the service life of the disconnecting switch.

[0006] However, some existing disconnect switches cannot reliably lock the open and closed states. During equipment operation, they are prone to accidental opening and closing due to external vibrations, human error, and other factors. At the same time, the opening and closing mechanisms of the disconnect switch and the grounding switch are independent of each other, which is not conducive to strictly implementing the safe operation procedure of opening the main switch first and then closing the grounding switch. Safety accidents such as closing the switch with the ground wire connected or closing the grounding switch while it is energized are likely to occur during operation. The protective capability of the equipment for opening and closing operations is insufficient.

[0007] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing disconnect switches. Summary of the Invention

[0008] The purpose of this invention is to provide a disconnecting switch with a protective structure to solve the problems mentioned in the background art, such as the inability of some existing disconnecting switches to reliably lock the open and closed states, the easy occurrence of accidental opening and closing of the switch due to external vibration, human error, and other factors during equipment operation, the independent opening and closing mechanisms of the disconnecting switch and the grounding switch, which is not conducive to strictly implementing the safe operation procedure of opening the main switch first and then closing the grounding switch, and the easy occurrence of safety accidents such as closing the switch with the ground wire connected or closing the grounding switch while it is energized during operation, and the insufficient protection capability of the equipment during opening and closing operations.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a disconnecting switch with a protective structure, comprising a protective housing for auxiliary disconnecting switch installation, two sets of post insulators are rotatably mounted on the protective housing, a conductive arm assembly for realizing closing and opening actions is provided between the two sets of post insulators, a power assembly for driving the two sets of post insulators to rotate synchronously in opposite directions is provided inside the protective housing, and a primary protection mechanism for locking the open state of the conductive arm assembly is also provided inside the protective housing, the primary protection mechanism being used to restrict the movement of the power assembly; a rocker arm that is rotatably mounted on the outside of the protective housing and connected to a grounding gate is rotatably mounted, the rocker arm being rotatably mounted in the protective housing via an operating shaft, a collar being coaxially sleeved on the outside of the operating shaft, a gap being reserved between the collar and the operating shaft, a secondary protection mechanism for locking the open state of the rocker arm is provided on the collar, the collar moving along the axis of the operating shaft to switch between triggering the primary protection mechanism and the secondary protection mechanism.

[0010] Preferably, the power assembly includes a driven shaft rotatably mounted inside the protective housing, the driven shaft being coaxially and fixedly connected to the post insulator, and a driven helical gear fixedly mounted on the outside of the driven shaft; a driving shaft is rotatably mounted inside the protective housing, and a driving helical gear is coaxially and fixedly mounted on the outside of the driving shaft, the driving helical gear meshing with two sets of driven helical gears.

[0011] Preferably, the secondary protection mechanism includes crossbars symmetrically fixed on both sides of the collar, with insertion rods vertically fixed on the crossbars; positioning plates are symmetrically fixed on both sides of the outer wall of the operating shaft, with insertion holes on the positioning plates, and the insertion rods move along the axial direction of the operating shaft and engage with the insertion holes.

[0012] Preferably, the inner wall of the protective box is fixed with a hollow guide post, and the hollow guide post has symmetrical grooves on both sides, with the crossbar slidably connected in the groove; a pin is axially telescopically connected in the hollow guide post, and the pin is fixedly connected to the crossbar.

[0013] Preferably, the secondary protection mechanism includes a disc coaxially fixed on the drive helical gear, with a circular hole off-center on the disc; a pin moves and engages with the circular hole, the side of the pin near the disc is arc-shaped, and the pin is elastically connected to a hollow guide post through a return spring.

[0014] Preferably, a locking block is fixedly installed on the outside of the operating shaft; a positioning block is fixed on the inner wall of the collar, and a locking hole is opened on the side of the positioning block near the locking block, and the locking block rotates circumferentially to engage with the locking hole.

[0015] Preferably, a protective cover is fixed to the end of the drive shaft, the protective cover is disposed outside the protective housing, and the protective cover is rotatably disposed outside the rocker arm.

[0016] Preferably, a ventilation straight pipe is fixedly installed on the outer wall of the protective box. The installation position of the ventilation straight pipe corresponds to the installation position of the hollow guide column. The hollow guide column is equipped with a transmission mechanism that controls the on / off state of the ventilation straight pipe and the inside of the protective box. The transmission mechanism is linked with the opening and closing action of the disconnecting switch to dynamically regulate the humidity and air pressure inside the protective box, so as to achieve moisture-proof and anti-condensation protection.

[0017] Preferably, the protective cover rotates to protect the air inlet port of the venting straight pipe.

[0018] Preferably, the transmission mechanism includes a sealing channel formed on the end face of the hollow guide post, the hollow guide post being connected to the vent pipe through the sealing channel; a sealing rod is fixedly connected along the axial direction in the pin, the sealing rod being directionally moved and engaging with the sealing channel for sealing connection; the pin is provided with multiple internal air passages equidistantly on the circumferential direction, and the hollow guide post is provided with multiple external air passages equidistantly on the circumferential direction.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The protective enclosure is also equipped with a primary protection mechanism that locks the open state of the conductive arm assembly. When the conductive arm assembly on the disconnecting switch is in the closed state, the collar is driven to move along the axis of the operating shaft, which in turn moves the plug rod in the primary protection mechanism and engages with the socket on the positioning plate. This structure can restrict the rotation of the operating shaft and maintain the rotation state of the rocker arm, thereby keeping the open state of the grounding switch locked and avoiding the safety hazard of accidentally closing the grounding switch while it is energized. It also effectively avoids misoperation problems caused by external vibration or accidental human contact.

[0021] The collar is equipped with a secondary protection mechanism for locking the rocker arm in the open state. When the conductive arm assembly on the disconnecting switch is in the open state, the pin is engaged with the circular hole on the disc under the elastic thrust of the return spring. At the same time, the collar is driven to move in the opposite direction along the axis of the operating shaft, causing the insert rod in the primary protection mechanism to move away from the positioning plate, thereby unlocking the lock on the rocker arm at this time. When the grounding switch is closed by controlling the rocker arm, the operating shaft drives the locking block to rotate synchronously. The locking block is engaged with the locking hole on the positioning block. Under the limiting effect of this part of the structure, the rotation of the disc and the active helical gear can be restricted, thereby maintaining the open state of the disconnecting switch at this time, preventing the main switch from being closed when the grounding switch is closed, avoiding serious safety accidents caused by closing the switch with the ground wire connected, and strictly following the power safety operation specification of opening the main switch first and then closing the grounding switch.

[0022] The collar moves along the operating shaft axis to switch between triggering the primary protection mechanism and the secondary protection mechanism, realizing the bidirectional interlocking logic of locking the grounding switch when closing and locking the main switch when opening. The two levels of mechanical protection are linked and mutually constrained, resulting in high structural linkage reliability. This avoids the risk of misoperation when using disconnect switches and improves the protection performance of disconnect switches.

[0023] The hollow guide column contains a transmission mechanism that controls the on / off state of the ventilation straight pipe and the protective box. When controlling the closing and opening operations of the disconnecting switch, the pin moves along the axial direction in the hollow guide column, which drives the sealing rod to move synchronously. This causes the sealing rod to move and block the sealing channel, or to move away from the sealing channel, thereby controlling the on / off state of the ventilation straight pipe that is connected to the hollow guide column. When the switch is closed, the sealing rod blocks the sealing channel, closing the ventilation passage of the box and preventing external moisture, rainwater and impurities from entering the protective box. When the switch is open, the sealing rod disengages from the sealing channel, and the internal and external air passages are connected. This can automatically balance the internal and external air pressure of the box, expel internal humid air, and prevent condensation, corrosion and moisture jamming of the transmission components inside the box. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the post insulator structure of the present invention.

[0025] Figure 2This is a schematic diagram of the conductive arm assembly structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective enclosure of the present invention.

[0027] Figure 4 This is a schematic diagram of the rocker arm structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the active helical gear and driven helical gear structure of the present invention.

[0029] Figure 6 This is a schematic diagram of the hollow guide post structure of the present invention.

[0030] Figure 7 This is a schematic diagram of the operating shaft structure of the present invention.

[0031] Figure 8 This is a schematic diagram of the collar structure of the present invention.

[0032] Figure 9 This is a schematic diagram of the crossbar and insert bar structure of the present invention.

[0033] Figure 10 This is a schematic diagram of the pin structure of the present invention.

[0034] Figure 11 This is a schematic diagram of the reset spring structure of the present invention.

[0035] Figure 12 This is a schematic diagram of the locking block structure of the present invention.

[0036] Figure 13 This is a schematic diagram of the straight ventilation pipe structure of the present invention.

[0037] In the diagram: 1. Protective housing; 2. Post insulator; 21. Driven shaft; 22. Driven helical gear; 23. Driven shaft; 24. Driven helical gear; 3. Conductive arm assembly; 4. Rocker arm; 41. Operating shaft; 42. Collar; 43. Crossbar; 44. Insert rod; 45. Positioning plate; 46. Insertion hole; 47. Locking block; 48. Positioning block; 49. Locking hole; 5. Hollow guide post; 6. Slide groove; 7. Pin; 8. Disc; 9. Circular hole; 10. Return spring; 11. Protective cover; 12. Ventilation straight pipe; 121. Sealing channel; 122. Sealing rod; 123. Inner air passage; 124. Outer air passage. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figure 1 - Figure 6 The present invention provides the following technical solution: a disconnecting switch with a protective structure, comprising a protective housing 1 for auxiliary disconnecting switch installation, two sets of post insulators 2 are rotatably mounted on the protective housing 1, a conductive arm assembly 3 for realizing closing and opening actions is provided between the two sets of post insulators 2, a power assembly for driving the two sets of post insulators 2 to rotate synchronously in opposite directions is provided inside the protective housing 1, and a primary protection mechanism for locking the open state of the conductive arm assembly 3 is also provided inside the protective housing 1, the primary protection mechanism is used to restrict the movement of the power assembly; a rocker arm 4 that is connected to a grounding gate is rotatably mounted on the outside of the protective housing 1, the rocker arm 4 is rotatably mounted in the protective housing 1 through an operating shaft 41, a collar 42 is coaxially sleeved on the outside of the operating shaft 41, a gap is reserved between the collar 42 and the operating shaft 41, a secondary protection mechanism for locking the open state of the rocker arm 4 is provided on the collar 42, the collar 42 moves along the axis of the operating shaft 41 to switch between triggering the primary protection mechanism and the secondary protection mechanism.

[0040] The protective enclosure 1 serves as a supporting base, housing the power assembly, primary protection mechanism, and secondary protection mechanism. An external grounding switch operating rocker arm 4 extends outward from the operating shaft 41 (the rocker arm 4 can be manually operated; the operator applies a circumferential torque by holding the extended end of the rocker arm 4, causing the operating shaft 41 to rotate synchronously, thereby driving the grounding switch's blade arm to rotate around the shaft, completing the grounding switch's opening and closing actions). Two sets of support insulators 2 are arranged in a V-shape on the protective enclosure 1, with conductive arm assemblies 3 installed at their tops. Driven by the power assembly inside the protective enclosure 1, these assemblies rotate synchronously in opposite directions, enabling the conductive arm assemblies 3 to engage and disengage during opening and closing.

[0041] The collar 42 can slide axially along the operating shaft 41, and the secondary protection mechanism can lock and unlock the rotation state of the rocker arm 4. During the sliding process of the collar 42, the primary protection mechanism is linked to limit the movement state of the power component, thereby locking and unlocking the closing and opening states of the conductive arm component 3, realizing bidirectional mechanical interlocking between the main switch and the grounding switch, and avoiding the risk of misoperation such as closing the grounding switch with the power supply on or closing the switch with the ground wire on.

[0042] Please see Figure 3 - Figure 5The power assembly includes a driven shaft 21 rotatably mounted inside the protective housing 1, which is coaxially fixedly connected to the post insulator 2, and a driven helical gear 22 is fixedly mounted on the outside of the driven shaft 21; a driving shaft 23 is rotatably mounted inside the protective housing 1, and a driving helical gear 24 is coaxially fixed on the outside of the driving shaft 23, which meshes with two sets of driven helical gears 22.

[0043] An external operating torque is input to the drive shaft 23 (the extended end of the drive shaft 23 is provided with a drive connection part that connects to the external operating mechanism, and can be directly driven to rotate by the torque output from the manual operating handle or electric equipment), which drives the drive helical gear 24 to rotate synchronously. The drive helical gear 24 simultaneously meshes with the driven helical gears 22 on both sides, driving the two driven shafts 21 to rotate synchronously in opposite directions. The driven shafts 21 directly drive the coaxially fixed post insulators 2 to swing synchronously. The conductive arm assemblies 3 at the top of the left and right sets of post insulators 2 then synchronously move towards each other to complete the closing, or synchronously open outwards to complete the opening. The meshing transmission between the drive helical gear 24 and the driven helical gear 22 is smooth and has a strong load-bearing capacity, which can ensure that the movement of the post insulators 2 on both sides is synchronized and avoid misalignment and poor contact of the conductive arm assemblies 3.

[0044] Please see Figure 4 - Figure 9 The secondary protection mechanism includes crossbars 43 symmetrically fixed on both sides of the collar 42, and insert rods 44 vertically fixed on the crossbars 43; positioning plates 45 are symmetrically fixed on both sides of the outer wall of the operating shaft 41, and insertion holes 46 are opened on the positioning plates 45. The insert rods 44 move along the axial direction of the operating shaft 41 and engage with the insertion holes 46.

[0045] During the closing and opening operations of the main disconnect switch, the drive shaft 23 rotates, causing the disc 8 to rotate synchronously. The pin 7 presses against the surface of the disc 8. When the circular hole 9 on the disc 8 rotates to correspond with the pin 7, the pin 7 moves in a directional direction along its own axis under the elastic thrust of the return spring 10. When the drive shaft 23 rotates in the opposite direction, the disc 8 rotates and presses against the arc surface of the end face of the pin 7 through the side arc surface of the circular hole 9, thereby pushing the pin 7 to move in the opposite direction along its own axis. The pin 7 is fixedly connected to the collar 42 through the crossbar 43. During its movement, when it drives the collar 42 to slide axially along the operating shaft 41 (when the main disconnect switch is closed, the collar 42 moves closer to the positioning piece 45 to lock the grounding switch open state; when the main disconnect switch is opened, the collar 42 moves away from the positioning piece 45 to open the grounding switch). When the state is unlocked, the horizontal bars 43 on both sides move synchronously. The insertion rod 44 on the horizontal bar 43 moves synchronously with it. The length direction of the insertion rod 44 is parallel to the axis of the operating shaft 41. The collar 42 can drive the insertion rod 44 to move directionally along the axis of the operating shaft 41. When the conductive arm assembly 3 is in the closed energized position, the collar 42 slides towards the side wall of the protective box 1. At this time, the insertion rod 44 is aligned with the insertion hole 46 on the positioning piece 45 and fully inserted. The insertion rod 44 is rigidly locked with the insertion hole 46, locking the circumferential rotation freedom of the operating shaft 41, so that the rocker arm 4 cannot rotate to operate the grounding switch. When the conductive arm assembly 3 is fully open, the collar 42 slides outward in the opposite direction, and the insertion rod 44 moves away from the insertion hole 46, releasing the rotation restriction on the operating shaft 41. At this time, the rocker arm 4 can be rotated to operate the grounding switch to close.

[0046] Please see Figure 6 and Figure 10 Hollow guide posts 5 are fixed to the inner wall of the protective box 1. Slide grooves 6 are symmetrically opened on both sides of the hollow guide posts 5. The crossbar 43 is slidably connected in the slide grooves 6. A pin 7 is axially telescopically connected in the hollow guide posts 5. The pin 7 is fixedly connected to the crossbar 43.

[0047] Hollow guide post 5 is fixed to the inner wall of protective box 1 and guides the movement of pin 7. The long sliding grooves 6 on both sides of hollow guide post 5 provide a straight sliding direction for crossbar 43, restricting crossbar 43 to only move along the axis of operating shaft 41, thus preventing crossbar 43 from deviating or getting stuck. One end of pin 7 is rigidly fixed to crossbar 43. When pin 7 moves in and out of hollow guide post 5, it drives crossbar 43 to move synchronously.

[0048] Please see Figure 3 , Figure 6 and Figure 11 The secondary protection mechanism includes a disc 8 coaxially fixed on the active helical gear 24, and a circular hole 9 is provided off-center on the disc 8; the pin 7 moves and engages with the circular hole 9, the side of the pin 7 near the disc 8 is arc-shaped, and the inside of the pin 7 is elastically connected to the hollow guide post 5 through a return spring 10.

[0049] When the control shaft 23 rotates, it drives the drive helical gear 24 and the disk 8 to rotate synchronously. The circular hole 9 on the disk 8 is aligned with the end of the pin 7 only when the conductive arm assembly 3 is fully open. When the pin 7 and the circular hole 9 are not in the same position, the arc surface of the pin 7 presses against the surface of the disk 8. When the disk 8 rotates so that the circular hole 9 and the pin 7 are in the same position, the pin 7 is pushed closer to the disk 8 by the elastic thrust of the return spring 10. At this time, the arc end of the front end of the pin 7 is inserted into the circular hole 9, which initially limits the disk 8 and initially locks the drive helical gear 24 and the entire power assembly to prevent the main switch from being closed by mistake. During the closing process of the conductive arm assembly 3, the disk 8 rotates and presses the arc end of the pin 7. Based on the elastic force of the return spring 10, the pin 7 is pushed backward, so that the pin 7 moves away from the circular hole 9, releasing the lock on the power assembly and allowing the drive shaft 23 to rotate to complete the closing action of the disconnect switch.

[0050] Please see Figure 4 , Figure 7 and Figure 12 A locking block 47 is fixedly installed on the outside of the operating shaft 41; a positioning block 48 is fixed on the inner wall of the collar 42, and a locking hole 49 is opened on the side of the positioning block 48 near the locking block 47. The locking block 47 rotates circumferentially and engages with the locking hole 49.

[0051] When the disconnecting switch is in the open state, the primary protection mechanism initially locks the movement of the power component, while the secondary protection mechanism is in the unlocked state, enabling control of the grounding switch closing operation. The operator rotates the rocker arm 4, causing the operating shaft 41 to rotate synchronously. The locking block 47 on the outer wall of the operating shaft 41 rotates synchronously (when the rocker arm 4 is manually or electrically controlled externally to achieve grounding switch closing and opening operations, this driving force can drive the operating shaft 41 and locking block 47 to rotate; the locking block 47 can be driven based on existing closing and opening operations, without requiring an additional power source). When the primary protection mechanism triggers the locking of the power component, the pin 7... The crossbar 43 drives the collar 42 to slide outward, and the positioning block 48 moves outward synchronously with the collar 42. Its movement is in the same plane as the locking block 47. After the locking block 47 rotates circumferentially with the operating shaft 41, it is locked into the locking hole 49 of the positioning block 48. The locking hole 49 restricts the locking block 47 from continuing to rotate, locking the operating shaft 41 in the grounding switch closing position. At the same time, the locking structure of the positioning block 48 and the locking block 47 can restrict the collar 42, the crossbar 43 and the pin 7 to move axially, keeping the pin 7 and the disc 8 locked at this time, thus forming a bidirectional lock. At the same time, it fixes the main switch opening position and the grounding switch closing position, providing double protection to prevent malfunction.

[0052] Please see Figure 3 , Figure 4 and Figure 13 A protective cover 11 is fixed to the end of the drive shaft 23. The protective cover 11 is located outside the protective housing 1 and is rotatably covered outside the rocker arm 4.

[0053] As the active shaft 23 rotates, it drives the post insulator 2 to complete the opening and closing of the circuit breaker. At the same time, the protective cover 11 rotates synchronously with the active shaft 23. Under normal circumstances, the protective cover 11 covers the outside of the rocker arm 4, preventing rainwater, dust and debris from directly impacting the rocker arm 4 and the operating shaft 41, and avoiding external foreign objects from blocking the grounding switch operating structure. At the same time, the protective cover 11 can work with the ventilation straight pipe 12 to form a shield and protection, reducing the direct impact of wind and sand and rainwater on the air inlet of the ventilation straight pipe 12, and extending the service life of the ventilation and moisture-proof mechanism.

[0054] Example 2: Please refer to Figures 10-13 Based on Embodiment 1, a transmission mechanism is also disclosed, the specific structure of which is as follows: A ventilation straight pipe 12 is fixedly installed on the outer wall of the protective box 1. The installation position of the ventilation straight pipe 12 corresponds to the installation position of the hollow guide column 5. The hollow guide column 5 is provided with a transmission mechanism that controls the on / off state of the ventilation straight pipe 12 and the inside of the protective box 1. The transmission mechanism is linked with the opening and closing action of the disconnecting switch to dynamically regulate the humidity and air pressure inside the protective box 1, so as to achieve moisture-proof and anti-condensation protection.

[0055] A straight ventilation pipe 12 is fixed to the outer wall of the protective enclosure 1, and its inner channel is directly aligned with the end face of the hollow guide post 5. The ventilation channel is controlled by a transmission mechanism composed of the internal pin 7 and sealing rod 122 of the hollow guide post 5. The transmission mechanism controlling ventilation is linked to the opening and closing action of the disconnecting switch, without the need for additional manual operation. When the disconnecting switch is closed, the ventilation channel of the protective enclosure 1 is automatically closed to prevent external humid air and rainwater from entering the enclosure. When the disconnecting switch is open for maintenance, the ventilation channel is automatically opened to balance the temperature difference and air pressure inside and outside the protective enclosure 1, and to discharge the water vapor accumulated inside the enclosure, so as to avoid the internal components from getting damp, rusted and stuck, and also to avoid the problem of condensation and rust in the outdoor disconnecting switch mechanism box.

[0056] Please see Figure 13 The protective cover 11 rotates to shield the air inlet of the ventilation straight pipe 12. The protective cover 11 is a rectangular cover structure, and its inner wall fits against the end face of the ventilation straight pipe 12. After the protective cover 11 rotates, it can completely cover the port of the ventilation straight pipe 12 to achieve shielding protection.

[0057] The protective cover 11 rotates synchronously with the active shaft 23. When the conductive arm assembly 3 is closed, the protective cover 11 rotates to the outside of the ventilation straight pipe 12, completely blocking the exposed air inlet of the ventilation straight pipe 12, preventing rain and sand from directly entering the ventilation straight pipe 12 and preventing impurities from blocking the ventilation channel. When the conductive arm assembly 3 is opened, the protective cover 11 rotates open synchronously, exposing the air inlet of the ventilation straight pipe 12, ensuring normal air circulation and ventilation inside the box, and taking into account both dust protection and ventilation and dehumidification needs.

[0058] Please see Figure 10 and Figure 11 The transmission mechanism includes a sealing channel 121 opened on the end face of the hollow guide post 5, and the hollow guide post 5 is connected to the ventilation straight pipe 12 through the sealing channel 121; a sealing rod 122 is fixedly connected in the pin 7 along the axial direction, and the sealing rod 122 moves in a direction and engages with the sealing channel 121 to seal; the pin 7 has multiple inner air passages 123 equidistantly opened in the circumferential direction, and the hollow guide post 5 has multiple outer air passages 124 equidistantly opened in the circumferential direction.

[0059] The sealing channel 121 at the front end of the hollow guide column 5 is the airflow channel between the inside of the box and the ventilation straight pipe 12. When the pin 7 moves forward and backward, it drives the sealing rod 122 to move back and forth synchronously. When the disconnecting switch is closed, the pin 7 retracts backward, and the sealing rod 122 presses and seals the sealing channel 121, cutting off the airflow path between the protective box 1 and the ventilation straight pipe 12, so that water vapor cannot enter the box. When the disconnecting switch is open, the reset spring 10 pushes the pin 7 to extend forward, and the sealing rod 122 disengages from the sealing channel 121. The airflow passes through the outer air passage 124, the inner air passage 123, the sealing channel 121, and the ventilation straight pipe 12 in sequence, completing the exchange of internal and external air, reducing the humidity inside the box, and preventing the internal parts from rusting and failing.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A disconnecting switch with a protective structure, comprising a protective enclosure (1) for mounting the auxiliary disconnecting switch, two sets of post insulators (2) being obliquely and rotatably mounted on the protective enclosure (1), and a conductive arm assembly (3) for realizing closing and opening actions being provided between the two sets of post insulators (2), characterized in that: The protective enclosure (1) is equipped with a power assembly that drives two sets of post insulators (2) to rotate synchronously in opposite directions. The protective enclosure (1) is also equipped with a primary protection mechanism that locks the open state of the conductive arm assembly (3). The primary protection mechanism is used to restrict the movement of the power assembly. The protective enclosure (1) is rotatably mounted with a rocker arm (4) that is connected to the grounding switch. The rocker arm (4) is rotatably mounted in the protective enclosure (1) via an operating shaft (41). A collar (42) is coaxially sleeved on the outside of the operating shaft (41). A gap is reserved between the collar (42) and the operating shaft (41). A secondary protection mechanism is provided on the collar (42) to lock the rocker arm (4) in the open state. The collar (42) moves along the axis of the operating shaft (41) to switch between triggering the primary protection mechanism and the secondary protection mechanism.

2. The disconnecting switch with a protective structure according to claim 1, characterized in that: The power assembly includes a driven shaft (21) rotatably installed inside the protective housing (1), the driven shaft (21) being coaxially and fixedly connected to the post insulator (2), and a driven helical gear (22) being fixedly installed on the outside of the driven shaft (21). The protective housing (1) has an internal rotating drive shaft (23) and an external coaxial drive helical gear (24) fixed to the outside of the drive shaft (23). The drive helical gear (24) meshes with two sets of driven helical gears (22).

3. A disconnecting switch with a protective structure according to claim 2, characterized in that: The secondary protection mechanism includes crossbars (43) symmetrically fixed on both sides of the collar (42), and insert rods (44) are vertically fixed on the crossbars (43). Positioning plates (45) are symmetrically fixed on both sides of the outer wall of the operating shaft (41). The positioning plates (45) have insertion holes (46). The insertion rod (44) moves along the axial direction of the operating shaft (41) and engages with the insertion hole (46).

4. A disconnecting switch with a protective structure according to claim 3, characterized in that: The inner wall of the protective box (1) is fixed with a hollow guide post (5), and the hollow guide post (5) is symmetrically provided with sliding grooves (6) on both sides, and the crossbar (43) is slidably connected in the sliding groove (6); A pin (7) is axially telescopically connected in the hollow guide post (5), and the pin (7) is fixedly connected to the crossbar (43).

5. A disconnecting switch with a protective structure according to claim 4, characterized in that: The secondary protection mechanism includes a disc (8) coaxially fixed on the drive helical gear (24), and a circular hole (9) is provided off-center on the disc (8). The pin (7) moves and engages with the round hole (9). The side of the pin (7) near the disc (8) is arc-shaped, and the inside of the pin (7) is elastically connected to the hollow guide post (5) through the return spring (10).

6. A disconnecting switch with a protective structure according to claim 5, characterized in that: A locking block (47) is fixedly installed on the outside of the operating shaft (41). A positioning block (48) is fixed on the inner wall of the collar (42). A locking hole (49) is provided on the side of the positioning block (48) near the locking block (47). The locking block (47) rotates circumferentially and engages with the locking hole (49).

7. A disconnecting switch with a protective structure according to claim 4, characterized in that: The end of the drive shaft (23) is fixed with a protective cover (11), which is located outside the protective housing (1) and rotates to cover the outside of the rocker arm (4).

8. A disconnecting switch with a protective structure according to claim 7, characterized in that: A ventilation straight pipe (12) is fixedly installed on the outer wall of the protective box (1). The installation position of the ventilation straight pipe (12) corresponds to the installation position of the hollow guide column (5). The hollow guide column (5) is equipped with a transmission mechanism that controls the on / off state of the ventilation straight pipe (12) and the inside of the protective box (1). The transmission mechanism is linked with the opening and closing action of the disconnecting switch to dynamically regulate the humidity and air pressure inside the protective box (1) and realize moisture-proof and anti-condensation protection.

9. A disconnecting switch with a protective structure according to claim 8, characterized in that: The protective cover (11) rotates to protect the air inlet port of the vent pipe (12).

10. A disconnecting switch with a protective structure according to claim 8, characterized in that: The transmission mechanism includes a sealed channel (121) opened on the end face of the hollow guide column (5), and the hollow guide column (5) is connected to the ventilation straight pipe (12) through the sealed channel (121); A sealing rod (122) is fixedly connected along the axial direction in the pin (7). The sealing rod (122) moves in a directional manner and engages with the sealing channel (121) to form a sealing connection. The pin (7) has multiple internal air passages (123) equidistantly arranged in the circumferential direction, and the hollow guide column (5) has multiple external air passages (124) equidistantly arranged in the circumferential direction.

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