A high-voltage explosion-proof switch

Abstract

The application discloses a high-voltage explosion-proof switch, which comprises an explosion-proof box body and a machine core installed in the explosion-proof box body, wherein the explosion-proof box body comprises a shell, a box door and a rear cover; a box partition plate is arranged in the shell and used for installing a static contact seat; a protection plate is arranged and used for shielding the static contact seat; a linkage mechanism linked with the protection plate is arranged on the shell; an opening and closing structure is arranged between the shell and the machine core; and a locking piece is arranged between the shell and the box door. The high-voltage explosion-proof switch is linked with each other through the linkage mechanism, the opening and closing structure and the locking piece, so that when the box door needs to be opened and is in an open state, the isolation switch on the explosion-proof switch cannot be closed, and the whole explosion-proof switch is in a power-off state; only when the box door is closed and is in a locked state, the isolation switch can be closed through the rotation of an operating rod, so that the safety of an operator in the process of troubleshooting and maintenance is ensured.

Description

Technical Field

[0001] This invention relates to the field of electrical switch technology, and more specifically to a high-voltage explosion-proof switch. Background Technology

[0002] Mining high-voltage explosion-proof switches are suitable for use in underground coal mine high-voltage lines, especially as main switches and branch switches in 6KV-10KV power supply systems. They have functions such as overload, short circuit, undervoltage, and leakage protection. Due to the safety requirements of the underground working environment, explosion-proof switches are equipped with a connection mechanism that allows the isolating switch inside the explosion-proof housing to be operated from outside the explosion-proof housing by the isolating switch operating handle. This ensures that the explosion-proof switch meets the requirements of the "General Safety Technical Requirements for Underground Coal Mine Power Supply Systems and Equipment" during fault repair or periodic maintenance: "When the power is on, the housing cover cannot be opened, and when the housing cover is opened, the power cannot be connected."

[0003] According to the operating requirements of high-voltage explosion-proof switches, the explosion-proof cover should not be opened when the power supply is connected, and the power supply should not be connected after the explosion-proof cover is opened. However, existing high-voltage explosion-proof switches are operated by a handle for power-off and power-on, and the explosion-proof cover door is locked and unlocked by a door lock. Thus, opening the explosion-proof door and disconnecting the high-voltage explosion-proof switch are two separate operations, which can lead to misoperation or violations by underground electricians, resulting in the live opening of the mine explosion-proof switch power supply, which poses a significant safety risk. Current technology relies on dedicated personnel supervision and on-site warning signs to solve this problem, but it is still insufficient.

[0004] For example, the invention patent application with publication number CN110335768A, entitled "A Switch for Opening and Closing Interlocking Feeder", published on October 14, 2019, includes a body with at least two stationary connectors connected to the incoming and outgoing lines respectively; it also includes a moving connector connected to a circuit breaker and slidably mounted on the body; it further includes a changeover switch connected to the outgoing line and a pin pointing to the changeover switch, the pin being slidably mounted on the body, and the knob of the changeover switch having a groove for the pin to be inserted, wherein the groove is aligned with the pin and the pin can only be inserted into the groove when the knob of the changeover switch is turned to the de-energized state; it also includes a drive mechanism that can drive the moving connector to move and cooperate with the stationary connector, and simultaneously drive the pin to move and pull it out of the groove, and when the drive mechanism drives the pin to move and insert it into the groove, the moving connector separates from the stationary connector.

[0005] For example, the invention patent application with publication number CN108389755A, entitled "A Mining Explosion-proof Permanent Magnet Vacuum Feeder Switch", published on August 10, 2018, includes a plug-in main circuit connection component socket and a mechanism connection component plug disposed in the explosion-proof switch housing. The socket is disposed in the explosion-proof switch housing, and the plug is disposed on the other side of the socket corresponding to the plug-in. When the plug is inserted into the socket, the switch mechanism is connected to the main circuit, and the switch is in the closed state. The explosion-proof switch also includes a lifting device and a safety protection device.

[0006] While the aforementioned disclosed technologies provide corresponding solutions, the drive mechanism, lifting device, and associated structure undoubtedly increase the complexity of the structure, raising manufacturing difficulty and costs, thus increasing operating costs. Furthermore, the increased structural complexity also enhances maintenance difficulty. Therefore, this application aims to address the problem of controlling manufacturing costs while simultaneously solving the problem of misoperation through a simpler structure. Summary of the Invention

[0007] The purpose of this invention is to provide a high-voltage explosion-proof switch to overcome the above-mentioned shortcomings in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A high-voltage explosion-proof switch includes an explosion-proof enclosure and a mechanism mounted in the explosion-proof enclosure via a slide rail structure. The explosion-proof enclosure includes a shell, a door disposed on the shell, and a rear cover. The switch is characterized by further comprising:

[0010] A housing partition is disposed within the housing, the housing partition dividing the housing into a first housing and a second housing;

[0011] A stationary contact seat is disposed on the partition plate of the housing;

[0012] A protective plate, which is installed on the partition of the housing, is used to shield the stationary contact seat;

[0013] A linkage mechanism is disposed between the protective plate and the first housing.

[0014] An opening and closing structure is disposed between the movement and the first housing;

[0015] The first housing exterior is also provided with a locking element.

[0016] Preferably, the linkage mechanism includes a push rod, a rotating arm, and a support arm.

[0017] Preferably, one end of the push rod extends through an annular hole provided on the first housing to the outside of the first housing, and the other end of the push rod is rotatably connected to one end of the rotating arm.

[0018] Preferably, the rotating arm has an L-shaped structure, and the rotating arm is rotatably connected to the inner wall of the first housing at its corner; the other end of the rotating arm is rotatably connected to one end of the support arm, and the other end of the support arm is rotatably connected to the protective plate.

[0019] Preferably, the support arm is rotatably connected to the box partition at its middle position; one end of the support arm connected to the rotating arm is bent longitudinally toward the rotating arm to form an end, and the rotating arm is rotatably connected to the end.

[0020] Preferably, the protective plate is provided with a strip-shaped hole, and the box partition is provided with a positioning rod corresponding to the protective plate.

[0021] Preferably, the opening and closing structure includes: a first arm rotatably connected at one end to one side of the movement, a second arm rotatably connected at the other end of the first arm, a rotating shaft fixedly connected to the second arm, and an operating rod fixedly connected to the outside of the first housing through the rotating shaft.

[0022] Preferably, the first housing exterior is further provided with a locking element, which includes a spring, a base, and a locking rod; the base is fixed by bolts to a cavity with through holes at both ends on the outside of the first housing.

[0023] Preferably, the locking rod is provided with a baffle and a lever.

[0024] Preferably, the operating lever is fixedly connected to the rotating shaft and also fixedly connected to a disc, which is provided with a pointer and a locking mechanism.

[0025] In the above technical solution, the present invention provides a high-voltage explosion-proof switch, including an explosion-proof enclosure and a mechanism installed in the explosion-proof enclosure via a slide rail structure. The explosion-proof enclosure includes a shell, a door, and a rear cover. A partition is provided inside the shell for installing a stationary contact seat, and a protective plate is provided for shielding the stationary contact seat. A linkage mechanism linked to the protective plate is provided on the shell. An opening and closing structure is provided between the shell and the mechanism, and a locking element is provided between the shell and the door. This ensures that during operation, when the door needs to be opened and is in the open state, the isolating switch on the explosion-proof switch cannot be closed, and the entire explosion-proof switch is in a de-energized state. Only when the door is closed and locked can the operating lever be rotated to close the isolating switch, thereby ensuring the safety of operators during troubleshooting and maintenance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of the structure of a high-voltage explosion-proof switch provided in another embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the linkage mechanism provided in another embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the opening and closing structure provided in another embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a locking member provided in another embodiment of the present invention;

[0031] Explanation of reference numerals in the attached figures:

[0032] Explosion-proof enclosure 1, mechanism 2, enclosure partition 3, stationary contact seat 4, protective plate 5, linkage mechanism 6, rotating shaft 7, operating lever 8, opening and closing structure 9, locking component 10;

[0033] 11. Shell 12. Door 13. Back cover 14. Circular disc 14;

[0034] First shell 11.1, second shell 11.2;

[0035] Circular aperture 11.11, observation window 11.12;

[0036] First boom 91, second boom 92;

[0037] Positioning rod 31;

[0038] 51-shaped hole;

[0039] Push rod 61, rotating arm 62, support arm 63, end cap 631;

[0040] 10.1 Spring, 10.2 Base, 10.3 Locking rod, 10.4 Baffle, 10.5 Toggle lever;

[0041] Through hole 10.21, cavity 10.22;

[0042] Pointer 14.1, bayonet 14.2;

[0043] Column 41. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] like Figure 1-4 As shown, an embodiment of the present invention provides a high-voltage explosion-proof switch, including an explosion-proof enclosure 1 and a mechanism 2 installed in the explosion-proof enclosure via a slide rail structure. The explosion-proof enclosure 1 includes a housing 11, a door 12 disposed on the housing, and a rear cover 13. The invention is characterized by further comprising:

[0046] A housing partition 3 is disposed in the housing 11, and the housing partition 3 divides the housing 11 into a first housing 11.1 and a second housing 11.2;

[0047] The stationary contact seat 4 is disposed on the housing partition 3;

[0048] The protective plate 5 is installed on the partition plate 3 of the housing and is used to shield the stationary contact seat 4;

[0049] The linkage mechanism 6 is disposed between the protective plate 5 and the first housing 11.1;

[0050] An opening and closing structure 9 is disposed between the movement 2 and the first housing 11.1;

[0051] The first housing 11.1 is also provided with a locking element 10.

[0052] Specifically, the enclosure partition 3 divides the housing 11 into a first housing 11.1 and a second housing 11.2; the second housing 11.2 serves as a wiring cavity, and the first housing 11.1 serves as the main cavity. The slide rail structure of the mechanism 2 is installed in the first housing 11.1. The slide rail structure is existing technology and will not be described in detail. All electrical components are mounted on the mechanism 2, including the pole post 41 that plugs into the stationary contact seat 4.

[0053] In this embodiment, when the cabinet door 12 needs to be opened and is in the open state, simply rotate the operating lever 8, which drives the mechanism 2 to slide through the opening and closing structure 9, causing the pole post 41 to disengage from the stationary contact seat 4, thus disconnecting the isolating switch; at this time, the locking member 10 is unlocked, and the cabinet door 12 can be opened; after the cabinet door 12 is opened, the linkage mechanism 6 loses the force of the cabinet door 12, and the protective plate 5 moves downward under its own gravity to cover the stationary contact seat 4, thereby effectively preventing the operating lever 8 from being accidentally operated or the mechanism 2 from being manually pushed to close the isolating switch, i.e., the pole post 41 is inserted into the stationary contact seat 4, when the cabinet door is open.

[0054] In the embodiments provided by the present invention, the linkage mechanism 6 includes a push rod 61, a rotating arm 62, and a support arm 63.

[0055] One end of the push rod 61 extends through the annular hole 11.11 provided on the first housing 11.1 to the outside of the first housing 11.1, and the other end of the push rod 61 is rotatably connected to one end of the rotating arm 62.

[0056] The rotating arm 62 has an L-shaped structure and is rotatably connected to the inner wall of the first housing 11.1 at its corner; the other end of the rotating arm 62 is rotatably connected to one end of the support arm 63, and the other end of the support arm 63 is rotatably connected to the protective plate 5.

[0057] The support arm 63 is rotatably connected to the box partition 3 at its middle position; one end of the support arm 63 connected to the rotating arm 62 is bent longitudinally towards the rotating arm 62 to form an end 631, and the rotating arm 62 is rotatably connected to the end 631.

[0058] Specifically, when the door 12 is closed, the door 12 presses against the end of the push rod 61 that extends out of the first housing 11.1, causing the push rod 61 to drive the rotating arm 62 to rotate, causing the connecting end of the rotating arm 62 and the support arm 63 to move downward, causing the connecting end of the support arm 63 and the protective plate 5 to move upward, thereby raising the protective plate 5 and exposing the stationary contact seat 4.

[0059] When the door 12 is opened, the push rod 61 is no longer pressed by the door 12, and the protective plate 5 moves downward under its own weight to cover the stationary contact seat 4, thereby effectively preventing the operation rod 8 from being accidentally operated or the mechanism 2 from being manually pushed to close the isolating switch when the door is open, that is, the pole post 41 is inserted into the stationary contact seat 4.

[0060] In the embodiments provided by the present invention, the protective plate 5 is provided with a strip hole 51, and the box partition 3 is provided with a positioning rod 31 corresponding to the protective plate 5.

[0061] Specifically, when the door 12 is opened, the push rod 61 is no longer pressed by the door 12, and the purpose of the protective plate 5 moving downward under its own gravity is to cover the stationary contact seat 4 and prevent the pole post 41 from being inserted into the stationary contact seat 4 due to misoperation. The positioning rod 31 can effectively limit the distance of movement of the protective plate 5 and prevent the protective plate 5 from shifting to the left or right.

[0062] In the embodiments provided by the present invention, the opening and closing structure 9 includes: a first arm 91 rotatably connected at one end to one side of the movement 2, a second arm 92 rotatably connected at the other end of the first arm 91, a rotating shaft 7 fixedly connected to the second arm 92, and an operating rod 8 fixedly connected to the outside of the first housing 11.1 through the rotating shaft 7.

[0063] Specifically, the rotating shaft 7 passes through the first housing 11.1 and rotates within the first housing 11.1. The rotating shaft 7 can be connected to the first housing 11.1 via a bearing connection or other rotatable connection method, which is existing technology and will not be described in detail.

[0064] Rotating the operating lever 8 causes the first arm 91 to rotate, which in turn changes the angle between the first arm 91 and the second arm 92, thus enabling the movement 2 to slide on the slide rail structure.

[0065] It should be noted that the connection between the mechanism 2 and the first arm 91 is a movable rotating connection. After the case door is opened, the connection between the mechanism 2 and the first arm 91 can be opened, thereby allowing the mechanism 2 to be moved out of the case 11. Therefore, the connection between the mechanism 2 and the first arm 91 can be a movable pin connection, or it can be a bolt or other movable and rotatable connection method.

[0066] In the embodiments provided by the present invention, the first housing 11.1 is further provided with a locking member 10, the locking member 10 including a spring 10.1, a base 10.2 and a locking rod 10.3; the base 10.2 is a cavity 10.22 with through holes 10.21 at both ends, which is fixed to the outside of the first housing 11.1 by bolts.

[0067] Preferably, the locking rod 10.3 is provided with a baffle 10.4 and a lever 10.5.

[0068] Preferably, the operating lever 8 is fixedly connected to the rotating shaft 7 and is also fixedly connected to a disc 14, on which a pointer 14.1 and a bayonet 14.2 are provided.

[0069] Specifically, a baffle 10.4 is provided on the locking rod 10.3 located in the cavity 10.22. A spring 10.1 is sleeved on the locking rod 10.3, with one end pressing against the end face of the cavity 10.22 near the door 12, and the other end pressing against the baffle 10.4. Under the action of the spring 10.1, one end of the locking rod 10.3 near the door 12 is flush with the through hole 10.21. A lever 10.5 is provided on the rod at the other end of the locking rod 10.3.

[0070] When the door 12 is closed, the locking rod 10.3 extends from the through hole 10.21 near the door 12 to restrict the opening of the door 12. The spring 10.1 is compressed, and the other end of the locking rod 10.3 abuts against the circle of the disc 14.

[0071] When it is necessary to open the door 12, rotate the operating lever 8, and the locking lever 10.3 slides on the circle of the disc 14. When the pointer 14.1 points to the nameplate "disconnected" on the housing 11, it indicates that the opening and closing structure 9 has disconnected the pole post 41 of the mechanism 2 from the stationary contact seat 4.

[0072] At this time, the locking rod 10.3 is exactly at the latch 14.2 on the circular disc 14 of the slide. Under the action of the spring 10.1, the locking rod 10.3 extends into the latch 14.2, and the disc 14 cannot rotate, thus unlocking the door 12 while locking the operating rod 8.

[0073] If the door 12 is opened at this time, the linkage mechanism 6 will cause the protective plate 5 to move downward under its own gravity to cover the stationary contact seat 4 when the door 12 is not under pressure.

[0074] Therefore, only when the door 12 is closed, the door 12 pushes the push rod 61 to rotate the rotating arm 62, causing the connecting end of the rotating arm 62 and the support arm 63 to move downward, so that the connecting end of the support arm 63 and the protective plate 5 moves upward, thereby lifting the protective plate 5, and the protective plate 5 will be removed from the protective state, exposing the stationary contact seat 4.

[0075] Even when the cabinet door 12 is closed, the isolating switch cannot be closed without locking the cabinet door 12, meaning the pole post 41 of the mechanism 2 cannot be closed to the stationary contact seat 4. Specifically, when the cabinet door 12 is closed, the operating lever 8 can only be rotated by manually moving the lever 10.5 to disengage the locking lever 10.3 from the latch 14.2. Once the locking lever 10.3 disengages from the latch 14.2, the other end of the locking lever 10.3 locks the cabinet door 12.

[0076] This application provides a high-voltage explosion-proof switch, including an explosion-proof enclosure and a mechanism installed in the enclosure via a slide rail structure. The explosion-proof enclosure includes a shell, a door, and a rear cover. A partition is provided inside the shell for mounting a stationary contact seat, and a protective plate is provided to shield the stationary contact seat. A linkage mechanism linked to the protective plate is provided on the shell. An opening and closing structure is provided between the shell and the mechanism, and a locking element is provided between the shell and the door. This ensures that during operation, when the door is open, the disconnector switch on the explosion-proof switch cannot be closed, and the entire explosion-proof switch is de-energized. Only after the door is closed and locked can the operating lever be rotated to close the disconnector switch, thereby ensuring the safety of operators during troubleshooting and maintenance.

[0077] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-voltage explosion-proof switch, comprising an explosion-proof enclosure (1) and a mechanism (2) mounted in the explosion-proof enclosure via a slide rail structure, wherein the explosion-proof enclosure (1) comprises a housing (11), a door (12) disposed on the housing, and a rear cover (13), characterized in that, Also includes: A box partition (3) is disposed in the housing (11), the box partition (3) dividing the housing (11) into a first housing (11.1) and a second housing (11.2). A stationary contact seat (4) is disposed on the housing partition (3); A protective plate (5) is provided on the partition plate (3) of the housing to shield the stationary contact seat (4). A linkage mechanism (6) is disposed between the protective plate (5) and the first housing (11.1). The linkage mechanism (6) includes a push rod (61), a rotating arm (62) and a support arm (63). One end of the push rod (61) extends through the annular hole (11.11) on the first housing (11.1) to the outside of the first housing (11.1). The other end of the push rod (61) is rotatably connected to one end of the rotating arm (62). The rotating arm (62) has an L-shaped structure. The rotating arm (62) is rotatably connected to the inner wall of the first housing (11.1) at its corner. The other end of the rotating arm (62) is rotatably connected to one end of the support arm (63). The other end of the support arm (63) is rotatably connected to the protective plate (5). The middle position of the support arm (63) is rotatably connected to the box partition (3). An opening and closing structure (9) is disposed between the movement (2) and the first housing (11.1). The opening and closing structure (9) includes: a first arm (91) rotatably connected at one end to one side of the movement (2), and a second arm (92) rotatably connected at the other end of the first arm (91). The second arm (92) is fixedly connected to a rotating shaft (7), and the rotating shaft (7) passes through the first housing (11.1) and is fixedly connected to an operating rod (8) outside the first housing (11.1). The operating rod (8) is fixedly connected to the rotating shaft (7) and is also fixedly connected to a disc (14). The first housing (11.1) is further provided with a locking element (10), which includes a spring (10.1), a base (10.2) and a locking rod (10.3).

2. The high-voltage explosion-proof switch according to claim 1, characterized in that, One end of the support arm (63) connected to the rotating arm (62) is bent longitudinally toward the rotating arm (62) to form an end (631), and the rotating arm (62) is rotatably connected to the end (631).

3. The high-voltage explosion-proof switch according to claim 2, characterized in that, The protective plate (5) is provided with a strip hole (51), and the box partition (3) is provided with a positioning rod (31) corresponding to the protective plate (5).

4. The high-voltage explosion-proof switch according to claim 1, characterized in that, The base (10.2) is a cavity (10.22) with through holes (10.21) at both ends, which is fixed to the outside of the first housing (11.1) by bolts.

5. The high-voltage explosion-proof switch according to claim 1, characterized in that, The locking rod (10.3) is equipped with a baffle (10.4) and a lever (10.5).

6. The high-voltage explosion-proof switch according to claim 5, characterized in that, The disc (14) is provided with a pointer (14.1) and a bayonet (14.2).

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