Air switch

Abstract

The invention discloses an air switch which comprises a shell, an opening and closing brake and a locking device, the opening and closing brake is provided with a locking groove, and the opening and closing brake is rotatably connected with the shell so that the opening and closing brake can be switched between an opening state and a closing state; the locking device comprises a control piece, a locking piece and a linkage assembly, the locking piece is slidably connected with the shell in the direction close to or away from the opening and closing brake, the control piece slidably penetrates through the side wall of the shell, the control piece is connected with the locking piece through the linkage assembly, and the control piece is used for controlling the locking piece to slide. The locking device is switched between a locking state and an unlocking state; and when the opening and closing brake is in an opening state and the locking device is in a locking state, the locking piece is matched with the locking groove in an inserting manner. According to the air switch provided by the embodiment of the invention, physical locking of the air switch in an opening state can be realized through the locking device under the condition that equipment is powered off, and an opening protection mechanism of the air switch is enhanced, so that the operation safety of operators is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit protection devices, and in particular to an air switch. Background Art

[0002] Air circuit breakers are widely used in the industrial sector for secondary power distribution, equipment power supply, and equipment isolation in power systems. When closed, they offer comprehensive protection, including overload and short-circuit protection. However, when disconnected, they lack these features. For example, similar circuit breakers of 400V and above can be placed in the "remove" position or padlocked to prevent accidental closing, but air circuit breakers, due to structural limitations, cannot implement these features.

[0003] Currently, to ensure safe maintenance work after power outages, a "Do Not Close, Someone is Working!" sign is typically hung on the operating handle of the air switch to prevent accidental closing of the air switch, which can lead to safety accidents. Furthermore, due to the compact layout and small spacing within the air switch control cabinet, the "Do Not Close, Someone is Working" sign is prone to falling off. This can easily lead to the sign not being hung in compliance with safety regulations or being missing, posing a significant risk to the safety of power plant equipment and personnel. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an air switch. When the equipment is powered off, the air switch can be physically locked in the open state through a locking device, thereby strengthening the open protection mechanism of the air switch and improving the operating safety of the operator.

[0006] The air switch of an embodiment of the present invention includes a shell, a switch and a locking device, the switch has a locking groove, the switch is rotatably connected to the shell, so that the switch can switch between the open state and the closed state; the locking device includes a control part, a locking part and a linkage assembly, the locking part is slidably connected to the shell in a direction approaching or away from the switch, the control part can slide through the side wall of the shell, the control part and the locking part are connected through the linkage assembly, so that the control part can be used to control the sliding of the locking part, so that the locking device switches between the locked state and the unlocked state; when the switch is in the open state and the locking device is in the locked state, the locking part is plugged into the locking groove.

[0007] In some embodiments, the air switch also includes a display device, which includes a display rod, a first sign and a second sign, the display rod is slidably connected to the shell, and the first sign and the second sign are both connected to the display rod; the shell has a display window, and the display rod is connected to the control member through the linkage assembly, so that the control member can be used to control the sliding of the display rod so that any one of the first sign and the second sign is aligned with the display window.

[0008] In some embodiments, the control member is a control rod, the length direction of the control rod is perpendicular to the length direction of the display rod, the control rod has a control end arranged on the outside of the shell and a trigger end arranged on the inside of the shell, the linkage assembly includes a trigger block, the trigger block is connected to the trigger end, and the size of the trigger block in the length direction of the display rod gradually increases in the direction approaching the control end; the locking member is connected to a locking rod, the end of the locking rod abuts against the end of the control rod, the end of the display rod close to the locking rod has a first inclined surface, and the end of the locking rod close to the display rod has a second inclined surface, a trigger groove for the trigger block to enter is formed between the first inclined surface and the second inclined surface, and the size of the trigger groove in the length direction of the locking rod gradually increases in the direction approaching the control end, so as to drive the locking rod and the display rod to move relatively away from each other when the trigger block moves in the direction close to the trigger groove.

[0009] In some embodiments, the linkage assembly further includes a first return spring, the first return spring is connected to the display rod, and the first return spring is used to apply an elastic force to the display rod toward the locking rod.

[0010] In some embodiments, the linkage assembly further includes a second return spring, the second return spring is connected to the locking rod, and the second return spring is used to apply an elastic force to the locking rod toward the display rod.

[0011] In some embodiments, the linkage assembly also includes a first positioning member and a reset block, the first positioning member is fixedly connected to the control rod, the reset block is arranged between the first positioning member and the trigger block and is slidably mounted on the control rod, the cross-section of the reset block gradually decreases in the direction approaching the control end, and the end face of the reset block away from the control end is not smaller than the end face of the trigger block close to the control end.

[0012] In some embodiments, when the locking device is in a locked state, the maximum distance between the first inclined surface and the second inclined surface is greater than the maximum dimension of the reset block in the length direction of the locking rod.

[0013] In some embodiments, the linkage assembly further includes a third return spring, which is sleeved on the control rod and applies an elastic force from the trigger end to the control end on the control rod.

[0014] In some embodiments, the control rod is connected to a second positioning member, a stop plate is connected inside the shell, the stop plate is arranged between the first positioning member and the second positioning member, the third return spring is arranged between the second positioning member and the stop plate, and the two ends of the third return spring respectively stop at the second positioning member and the stop plate.

[0015] In some embodiments, the shell includes a panel and a shell body connected to each other, the panel has a gate, a control port and the display window, the opening and closing switch includes a handle, the handle passes through the gate, and the control member passes through the control port.

[0016] The air switch of the embodiment of the present invention is in a closed state when the equipment is operating normally, and the locking device is in an unlocked state; when the equipment needs to be powered off and stop running, the operator switches the open switch to the open state, and the locking slot changes position as the open switch state is switched, and the locking slot faces the locking piece; at the same time, the operator controls the control piece to slide, and controls the locking piece to move toward the locking slot through the linkage component, thereby inserting the locking piece into the locking slot, and switching the locking device to the locked state, which can limit the rotation of the open switch. In other words, when the locking device is in the locked state, the open switch can be locked in the open state, preventing the open switch from switching to the closed state; thus, when the equipment is powered off, the locking device can be used to physically lock the air switch in the open state, thereby strengthening the open switch protection mechanism of the air switch, thereby improving the operating safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an air switch in an embodiment of the present invention, in which the opening and closing of the air switch is in the closed state.

[0018] Figure 2 It is a structural schematic diagram of an air switch in an embodiment of the present invention, in which the opening and closing of the air switch is in the opening state and the locking device is in the unlocking state.

[0019] Figure 3 It is a structural schematic diagram of an air switch in an embodiment of the present invention, in which the opening and closing of the air switch is in the opening state and the locking device is in the locking state.

[0020] Reference numerals:

[0021] 100. Air switch;

[0022] 1. Housing; 11. Panel; 111. Display window; 112. Gate; 113. Control port; 12. Mounting base; 121. First mounting cavity; 122. Second mounting cavity; 123. Stop plate; 13. First fixing plate; 14. Second fixing plate;

[0023] 2. Opening and closing; 21. Gate body; 211. Locking groove; 22. Handle;

[0024] 3. Locking device; 31. Control lever; 311. Control end; 312. Trigger end; 32. Locking member; 33. Linkage assembly; 331. Trigger block; 332. First return spring; 333. Second return spring; 334. Return block; 335. First positioning ring; 336. Third return spring; 337. Second positioning ring; 34. Locking lever; 341. Second inclined surface; 35. Connecting rod;

[0025] 4. Display device; 41. Display rod; 411. First inclined surface; 411-1. Trigger slot; 42. First signboard; 43. Second signboard. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] like Figures 1 to 3 As shown, the air switch 100 of the embodiment of the present invention includes a shell 1, a switch 2 and a locking device 3. The switch 2 has a locking groove 211. The switch 2 is rotatably connected to the shell 1 so that the switch 2 can switch between the open state and the closed state; the locking device 3 includes a control part, a locking part 32 and a linkage assembly 33. The locking part 32 is slidably connected to the shell 1 in a direction approaching or away from the switch 2. The control part can slide through the side wall of the shell 1. The control part and the locking part 32 are connected through the linkage assembly 33, so that the control part can be used to control the sliding of the locking part 32 so that the locking device 3 can switch between the locked state and the unlocked state; when the switch 2 is in the open state and the locking device 3 is in the locked state, the locking part 32 is plugged into the locking groove 211.

[0028] The air switch 100 of the embodiment of the present invention is in a normal operating state, and the switch 2 is in a closed state and the locking device 3 is in an unlocked state; when the equipment needs to be powered off and stopped, the operator switches the switch 2 to the open state, and the locking groove 211 changes position as the state of the switch 2 is switched, and the locking groove 211 faces the locking piece 32; at the same time, the operator controls the control piece to slide, and controls the locking piece 32 to move in a direction close to the locking groove 211 through the linkage assembly 33, so that the locking piece 32 is inserted into the locking groove 211, and the locking device 3 switches to the locked state, which can limit the rotation of the switch 2. In other words, when the locking device 3 is in the locked state, the switch 2 can be locked in the open state, preventing the switch 2 from switching to the closed state; thus, when the equipment is powered off, the locking device 3 can be used to achieve physical locking of the air switch 100 in the open state, thereby strengthening the opening protection mechanism of the air switch 100 and improving the operating safety of the operator.

[0029] It can be understood that the opening and closing switch 2 is used to control the air switch 100 to be closed or opened. When the opening and closing switch 2 is in the opening state, the air switch 100 is opened. When the opening and closing switch 2 is in the closing state, the air switch 100 is closed.

[0030] like Figure 1 As shown, the opening and closing switch 2 includes a gate body 21 and a handle 22. The gate body 21 is rotatably connected to the shell 1, and the handle 22 is fixedly connected to the gate body 21. A part of the gate body 21 is located on the inner side of the shell 1, and the other part is located on the outer side of the shell 1; by rotating the handle 22 upward to the preset position, the opening and closing switch 2 can be switched to the closed state, and the air switch 100 is closed. By rotating the handle 22 downward to the preset position, the opening and closing switch 2 can be switched to the open state, and the air switch 100 is disconnected.

[0031] The locking groove 211 is formed on the outer wall of the gate body 21, and its position changes as the state of the open-close switch 2 is switched. When the open-close switch 2 is in the closed state, the locking groove 211 is arranged away from the locking member 32. When the open-close switch 2 is in the open state, the locking groove 211 is arranged toward the locking member 32. The locking member 32 can be inserted into the locking groove 211 by moving in the direction close to the open-close switch 2, thereby locking the open-close switch 2 in the open state.

[0032] In some embodiments, the air switch 100 also includes a display device 4, which includes a display rod 41, a first sign 42 and a second sign 43. The display rod 41 is slidably connected to the shell 1, and the first sign 42 and the second sign 43 are both connected to the display rod 41; the shell 1 has a display window 111, and the display rod 41 is connected to the control member through a linkage assembly 33, so that the control member can be used to control the sliding of the display rod 41, so that any one of the first sign 42 and the second sign 43 is aligned with the display window 111.

[0033] Specifically, if Figures 1 to 3 As shown, the first signboard 42 has the words "Operation allowed", and the second signboard 43 has the words "Closing is prohibited". The control display rod 41 slides relative to the shell 1, so that either the first signboard 42 or the second signboard 43 can be aligned with the display window 111. Relevant personnel can judge the status of the air switch 100 based on the words displayed in the display window 111.

[0034] The display rod 41 is connected to the control part through the linkage component 33. The operator drives the control part to move, and then controls the display rod 41 and the locking part 32 to move at the same time; for example, when the equipment is operating normally, the switch 2 is in the closed state, and the first sign 42 ("operation allowed") is aligned with the display window 111, reminding relevant personnel that they can operate the air switch 100; after the equipment is powered off, the control part is used to control the locking part 32 to be plugged into the locking groove 211, and the locking device 3 is switched to the locked state, which can lock the switch 2 in the open state. At the same time, the display rod 41 slides relative to the housing 1, so that the second sign 43 ("closing prohibited") is aligned with the display window 111, reminding relevant personnel that closing operation of the air switch 100 is prohibited.

[0035] Compared with the method in the related art of hanging a signboard with the words "Do not close the switch, someone is working!" on the operating handle 22 of the air switch 100, the first signboard 42 and the second signboard 43 in the embodiment of the present invention are arranged inside the housing 1, which can completely eliminate the hidden danger of the signboard falling off, ensure the normal use of the signboard, and thus reduce the risk of safety accidents caused by the closing of the air switch 100 due to misoperation by relevant personnel.

[0036] In addition, when the operator switches the locking device 3 from the unlocked state to the locked state, the first signboard 42 and the second signboard 43 can be automatically switched, which can overcome the problems of low installation efficiency and poor spatial adaptability of hanging signboards in related technologies. There is no need for manual operation by the operator, the operation is more convenient and efficient, and the maintenance cost is lower.

[0037] In some embodiments, the housing 1 includes a panel 11 and a shell body connected to each other, the panel 11 has a gate 112, a control port 113 and a display window 111, and the switch 2 includes a handle 22, the handle 22 passes through the gate 112, and the control part passes through the control port 113.

[0038] Specifically, if Figure 1 and Figure 2 As shown, the display window 111 , the control port 113 and the gate 112 are arranged in sequence from top to bottom.

[0039] The gate 112 , the control port 113 and the display window 111 are all arranged on the panel 11 , which is more convenient for the operator to operate the air switch 100 and improves the convenience of operation.

[0040] In some embodiments, the control member is a control rod 31, the length direction of the control rod 31 is perpendicular to the length direction of the display rod 41, the control rod 31 has a control end 311 provided on the outside of the housing 1 and a trigger end 312 provided on the inside of the housing 1, the linkage assembly 33 includes a trigger block 331, the trigger block 331 is connected to the trigger end 312, and the size of the trigger block 331 in the length direction of the display rod 41 gradually increases in the direction close to the control end 311; the locking member 32 is connected to the locking rod 34, and the end of the locking rod 34 is connected to the end of the control rod 31. The ends are abutted, and the end of the display rod 41 close to the locking rod 34 has a first inclined surface 411, and the end of the locking rod 34 close to the display rod 41 has a second inclined surface 341. A trigger groove 411-1 for the trigger block 331 to enter is formed between the first inclined surface 411 and the second inclined surface 341. The size of the trigger groove 411-1 in the length direction of the locking rod 34 gradually increases in the direction close to the control end 311, so as to drive the locking rod 34 and the display rod 41 to move relatively away from each other when the trigger block 331 moves toward the direction close to the trigger groove 411-1.

[0041] Specifically, if Figure 2 and Figure 3 As shown, the panel 11 is vertically arranged, and a mounting seat 12 is provided inside the housing 1 . The mounting seat 12 is arranged in close contact with the panel 11 and is fixedly connected to the housing 1 so as to realize the installation of the locking device 3 .

[0042] The mounting seat 12 has a first mounting cavity 121, the control rod 31 passes vertically through the panel 11, its control end 311 is located on the outside of the panel 11, the trigger end 312 is located on the inside of the panel 11 and extends into the first mounting cavity 121, and the trigger block 331 is arranged in the first mounting cavity 121; the display rod 41 and the locking rod 34 are both arranged near the trigger end 312 of the control rod 31, the display rod 41 is arranged on the upper side of the locking rod 34, the cross-sectional size and shape of the display rod 41 and the locking rod 34 are the same, the two are collinearly arranged and extend in the vertical direction; the display rod 41 passes through the upper cavity wall of the first mounting cavity 121 and its lower end is located in the first mounting cavity 121, the locking rod 34 passes through the lower cavity wall of the first mounting cavity 121 and its upper end is located in the first mounting cavity 121, and the lower end of the display rod 41 abuts against the upper end of the locking rod 34.

[0043] The trigger block 331 is fixedly connected to the trigger end 312 of the control rod 31. The trigger block 331 is conical, and its tip is away from the control rod 31. The cross-section of the trigger block 331 gradually increases in the direction approaching the control end 311, that is, the size of the trigger block 331 in the length direction of the display rod 41 gradually increases in the direction approaching the control end 311; the first inclined surface 411 is provided at the end of the display rod 41 close to the locking rod 34 and is arranged toward the control rod 31, and the second inclined surface 341 is provided at the end of the locking rod 34 close to the display rod 41 and is arranged toward the control rod 31. The first inclined surface 411 and the second inclined surface 341 form a conical trigger groove 411-1, and the opening of the trigger groove 411-1 is arranged toward the trigger block 331. The size of the trigger groove 411-1 in the length direction of the control rod 31 is smaller than the size of the display rod 41 in the length direction of the control rod 31.

[0044] When the equipment stops running, the switch 2 is in the open state. At this time, the locking device 3 needs to be switched from the unlocked state to the locked state; first, the control rod 31 is pressed to make the trigger block 331 move toward the direction close to the trigger groove 411-1, and the tip of the trigger block 331 first enters the trigger groove 411-1, and then the outer inclined conical surface of the trigger block 331 stops at the first inclined surface 411 and the second inclined surface 341, and then passes between the display rod 41 and the locking rod 34, so that the display rod 41 and the locking rod 34 are relatively far apart, that is, the display rod 41 moves upward, the locking rod 34 moves downward, and the locking device 3 switches to the locked state. The display rod 41 moves upward, driving the first sign 42 and the second sign 43 to move upward, so that the second sign 43 ("Do not close") is aligned with the display window 111 to remind relevant personnel that it is prohibited to close the air switch 100, thereby reducing the risk of accidental closing; the locking rod 34 moves downward, driving the locking member 32 to move downward, so that the locking rod 34 is inserted into the locking groove 211, locking the opening and closing switch 2 in the opening state, thereby further reducing the risk of accidental closing and improving the safety of the air switch 100 in the disconnected state.

[0045] The locking member 32 is rod-shaped, and the locking member 32 and the locking rod 34 are connected by a connecting rod 35. The locking member 32, the locking rod 34 and the connecting rod 35 are formed as one piece. The shape and size of the connecting rod 35 can be determined according to the distance between the locking member 32 and the locking rod 34, as long as the locking member 32 and the locking rod 34 can slide synchronously.

[0046] In some embodiments, the linkage assembly 33 further includes a first return spring 332 . The first return spring 332 is connected to the display rod 41 . The first return spring 332 is used to apply an elastic force to the display rod 41 toward the locking rod 34 .

[0047] In some embodiments, the linkage assembly 33 further includes a second return spring 333 , which is connected to the locking rod 34 . The second return spring 333 is used to apply an elastic force to the locking rod 34 toward the display rod 41 .

[0048] Specifically, if Figure 1 and Figure 2 As shown, a first fixing plate 13 is fixedly connected to the housing 1. The upper end of the display rod 41 is slidably inserted into the first fixing plate 13, and the lower end is slidably inserted into the upper cavity wall of the first mounting cavity 121, which can improve the smoothness of the upward and downward sliding of the display rod 41. A second fixing plate 14 is fixedly connected to the housing 1. The lower end of the locking rod 34 is slidably inserted into the second fixing plate 14, and the upper end is slidably inserted into the lower cavity wall of the first mounting cavity 121, which can improve the smoothness of the upward and downward sliding of the locking rod 34.

[0049] The first return spring 332 is mounted on the display rod 41 and positioned between the first sign plate 42 and the first fixing plate 13. Its two ends abut the first sign plate 42 and the first fixing plate 13, respectively. The first return spring 332 is in a compressed state, exerting a downward force on the display rod 41. The second return spring 333 is mounted on the locking rod 34 and positioned between the connecting rod 35 and the second fixing plate 14. Its two ends abut the connecting rod 35 and the second fixing plate 14, respectively. The second return spring 333 is in a compressed state, exerting an upward force on the locking rod 34 via the connecting rod 35. Consequently, under the elastic forces of the first and second return springs 332 and 333, the display rod 41 and the locking rod 34 tend to abut against each other.

[0050] like Figure 2 As shown, when the locking device 3 is in the unlocked state, the display rod 41 and the locking rod 34 abut against each other, and the trigger block 331 is located on a side of the display rod 41 and the locking rod 34 close to the panel 11.

[0051] like Figure 3 As shown, the control end 311 of the control rod 31 is pressed, so that the trigger block 331 passes through between the display rod 41 and the locking rod 34 and moves to the side of the display rod 41 and the locking rod 34 away from the panel 11. The end surface of the trigger block 331 close to the panel 11 is in contact with the display rod 41 and the locking rod 34. At this time, the lower end of the display rod 41 and the upper end of the locking rod 34 are both stopped at the outer wall of the control rod 31. The display rod 41 moves upward for a certain distance so that the second indicator plate 43 is aligned with the display window 111. The locking rod 34 moves downward for a certain distance so that the locking member 32 is inserted into the locking groove 211, that is, the locking device 3 is switched to the locked state.

[0052] In some embodiments, the linkage assembly 33 also includes a first positioning member and a reset block 334. The first positioning member is fixedly connected to the control rod 31. The reset block 334 is arranged between the first positioning member and the trigger block 331 and can be slidably mounted on the control rod 31. The cross-section of the reset block 334 gradually decreases in the direction approaching the control end 311, and the end face of the reset block 334 away from the control end 311 is not smaller than the end face of the trigger block 331 close to the control end 311.

[0053] In some embodiments, when the locking device 3 is in the locked state, the maximum distance between the first inclined surface 411 and the second inclined surface 341 is greater than the maximum dimension of the reset block 334 in the length direction of the locking rod 34 .

[0054] In some embodiments, the linkage assembly 33 further includes a third return spring 336 . The third return spring 336 is sleeved on the control rod 31 and applies an elastic force from the trigger end 312 to the control end 311 on the control rod 31 .

[0055] In some embodiments, the control rod 31 is connected to a second positioning member, and a stop plate 123 is connected inside the shell 1. The stop plate 123 is arranged between the first positioning member and the second positioning member. The third return spring 336 is arranged between the second positioning member and the stop plate 123. The two ends of the third return spring 336 respectively stop at the second positioning member and the stop plate 123.

[0056] Specifically, if Figure 2 and Figure 3 As shown, the first positioning member is a first positioning ring 335, which is sleeved on the control rod 31 and fixedly connected to the control rod 31, and the first positioning ring 335 is located in the first mounting cavity 121; the reset block 334 is conical, and its small end faces the control end 311 of the control rod 31, and its large end faces the trigger end 312 of the control rod 31, that is, the cross-section of the reset block 334 gradually decreases in the direction approaching the control end 311; the reset block 334 is arranged between the first positioning ring 335 and the trigger block 331, and is slidably sleeved on the control rod 31.

[0057] The mounting seat 12 also has a second mounting cavity 122, and the second mounting cavity 122 is arranged between the first mounting cavity 121 and the panel 11. The above-mentioned stop plate 123 is provided between the second mounting cavity 122 and the first mounting cavity 121, and the stop plate 123 is fixedly connected to the mounting seat 12; the second positioning member is a second positioning ring 337, the second positioning ring 337 is sleeved on the control rod 31 and fixedly connected to the control rod 31, the second positioning ring 337 is located in the second mounting cavity 122, the third return spring 336 is located between the second positioning ring 337 and the stop plate 123, the third return spring 336 is sleeved on the control rod 31, and the two ends of the third return spring 336 respectively stop at the second positioning ring 337 and the stop plate 123, and the third return spring 336 is in a compressed state, that is, the third return spring 336 applies an elastic force from its trigger end 312 to the control end 311 on the control rod 31 through the second positioning ring 337, so that the control rod 31 has a tendency to reset.

[0058] When the locking device 3 is in the locked state, the control rod 31 is inserted between the display rod 41 and the locking rod 34, and the distance between the first inclined surface 411 and the second inclined surface 341 becomes larger. At this time, the maximum distance between the first inclined surface 411 and the second inclined surface 341 is greater than the maximum dimension of the reset block 334 in the length direction of the locking rod 34, that is, the notch size of the trigger groove 411-1 is greater than the maximum dimension of the reset block 334, so that the reset block 334 can enter the trigger groove 411-1.

[0059] When the locking device 3 is in the unlocked state, the reset block 334 is attached to the trigger block 331 (such as Figure 2 As the locking device 3 switches from the unlocked state to the locked state, the control rod 31 drives the trigger block 331 and the first positioning ring 335 to move away from the panel 11 until the trigger block 331 moves to the side of the display rod 41 and the locking rod 34 away from the panel 11, and the locking device 3 switches to the locked state; at the same time, the first positioning ring 335 stops at the reset block 334 and pushes the reset block 334 to move to the notch of the trigger groove 411-1 (as shown in FIG. Figure 3 shown).

[0060] When the equipment needs to resume operation, the locking device 3 needs to be switched from the locked state to the unlocked state. First, the control end 311 of the control rod 31 is pressed. The control rod 31 drives the trigger block 331 and the first positioning ring 335 to continue to move in the direction away from the panel 11. The first positioning ring 335 pushes the reset block 334 into the trigger groove 411-1 and passes between the display rod 41 and the locking rod 34. When the reset block 334 moves to the side of the display rod 41 and the locking rod 34 away from the panel 11, the trigger block 331 stops at the cavity wall of the first mounting cavity 121 away from the panel 11, and the pressing of the control rod 31 stops; under the elastic force of the third reset spring 336, the control rod 31 drives the first positioning ring 335 and the trigger block 331 to move toward the housing 1 When the first locking cam 335 is in the unlocked position, the first locking cam 336 is in the unlocked position, and the second locking cam 337 is in the unlocked position, and the first locking cam 338 is in the unlocked position, and the second locking cam 339 is in the unlocked position, and the second locking cam 331 is in the unlocked position, and the first locking cam 339 is in the unlocked position, and the second locking cam 331 is in the unlocked position, and the first locking cam 338 is in the unlocked position, and the first locking cam 339 ...

[0061] After that, turn the switch 2 upwards and switch it to the closed state (such as Figure 1 As shown), the air switch 100 is closed and the equipment resumes operation.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0067] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air switch, characterized in that: include: A housing and a switch, wherein the switch has a locking groove and is rotatably connected to the housing so as to switch the switch between an open state and a closed state; A locking device, comprising a control member, a locking member, and a linkage assembly, wherein the locking member is slidably connected to the housing in a direction approaching or away from the opening and closing switch, the control member is slidable through a side wall of the housing, and the control member and the locking member are connected via the linkage assembly, so that the control member controls the sliding of the locking member to switch the locking device between a locked state and an unlocked state; When the switch is in the open state and the locking device is in the locked state, the locking member is plugged into and matched with the locking groove.

2. The air switch according to claim 1, characterized in that: The air switch further includes a display device, which includes a display rod, a first sign plate and a second sign plate, wherein the display rod is slidably connected to the housing, and the first sign plate and the second sign plate are both connected to the display rod; The housing has a display window, and the display rod is connected to the control member through the linkage assembly, so that the control member is used to control the display rod to slide, so that any one of the first signboard and the second signboard is aligned with the display window.

3. The air switch according to claim 2, characterized in that: The control member is a control rod, the length direction of the control rod is perpendicular to the length direction of the display rod, the control rod has a control end provided on the outside of the housing and a trigger end provided on the inside of the housing, the linkage assembly includes a trigger block, the trigger block is connected to the trigger end, and the size of the trigger block in the length direction of the display rod gradually increases in the direction close to the control end; The locking member is connected to a locking rod, an end of the locking rod abuts against the end of the control rod, the end of the display rod close to the locking rod has a first inclined surface, and the end of the locking rod close to the display rod has a second inclined surface, a triggering groove for the trigger block to enter is formed between the first inclined surface and the second inclined surface, and the size of the triggering groove in the length direction of the locking rod gradually increases in the direction close to the control end, so as to drive the locking rod and the display rod to move relatively away from each other when the trigger block moves in the direction close to the triggering groove.

4. The air switch according to claim 3, characterized in that: The linkage assembly further includes a first return spring connected to the display rod, and the first return spring is used to apply an elastic force to the display rod toward the locking rod.

5. The air switch according to claim 3, characterized in that: The linkage assembly further includes a second return spring connected to the locking rod, and the second return spring is used to apply an elastic force to the locking rod toward the display rod.

6. The air switch according to claim 3, characterized in that: The linkage assembly also includes a first positioning member and a reset block, the first positioning member is fixedly connected to the control rod, the reset block is arranged between the first positioning member and the trigger block and is slidably mounted on the control rod, the cross-section of the reset block gradually decreases in the direction approaching the control end, and the end face of the reset block away from the control end is not smaller than the end face of the trigger block close to the control end.

7. The air switch according to claim 6, characterized in that: When the locking device is in a locked state, the maximum distance between the first inclined surface and the second inclined surface is greater than the maximum dimension of the reset block in the length direction of the locking rod.

8. The air switch according to claim 6, characterized in that: The linkage assembly further includes a third return spring, which is sleeved on the control rod and applies an elastic force from the trigger end to the control end on the control rod.

9. The air switch according to claim 8, characterized in that: The control rod is connected to a second positioning member, and a stop plate is connected inside the shell. The stop plate is arranged between the first positioning member and the second positioning member. The third return spring is arranged between the second positioning member and the stop plate, and both ends of the third return spring stop at the second positioning member and the stop plate respectively.

10. The air switch according to any one of claims 2 to 9, characterized in that: The shell includes a panel and a shell body that are connected to each other. The panel has a gate, a control port and the display window. The opening and closing switch includes a handle. The handle passes through the gate, and the control member passes through the control port.

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