Three gate latching mechanism for electrically commutated switches and method of use

Abstract

The application is a three-door locking mechanism and using method for electrically commutated switch, which is used in the existing three-door type explosion-proof electrically commutated switch, and increases locking switch assembly, main shaft locking assembly and the like. Through the logical operation of the mechanism, the following functions are realized: 1. In normal working condition, the locking switch is locked in the closed door position, and the locking switch cannot be turned to the open door position as long as one of the three explosion-proof doors of the electrically commutated switch is continuously powered, and then all the three doors are locked; 2. After all the electrically commutated switches in the electrically commutated switch are powered off, the locking switch can be turned, and after being turned to the open door position, the explosion-proof door can be opened; 3. When the locking switch is in the open door position, the main lead screw is locked, and the main lead screw handle cannot be turned, that is, the electrically commutated switch cannot be powered again; 4. When any door is opened, the locking switch is locked in the open door position, and cannot be rotated to the closed door position. The application can improve the safety of the electrically commutated switch, and reduce the machine damage and personnel casualties caused by careless operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mine explosion-proof electric reversing switch, in particular to a three-door locking mechanism for electric reversing switch and a using method. BACKGROUND

[0002] In the mine, the explosion-proof electric reversing switch is very important as the main control mechanism of the conveyor, the transfer machine and the hydraulic pump station. In order to carry out normal mining, the switch needs to be opened regularly for maintenance and replacement of spare parts. Since the switch generally controls high voltage of more than 3300V, all the reversers must be de-energized before the door is opened. Therefore, a mechanism that can control all the reversers in the three explosion-proof doors to be de-energized before the door is opened, and any reverser cannot be energized after the door is opened, becomes the focus and difficulty of the design. SUMMARY

[0003] In view of this, the present application provides a three-door locking mechanism for electric reversing switch

[0004] Further, the switch can lock the explosion-proof door when any reverser in the electric reversing switch is energized, to ensure safety,

[0005] Further, the switch can be opened by operating a professional tool to open the locking switch when all the reversers in the electric reversing switch are de-energized, and then the explosion-proof door can be opened,

[0006] Further, the switch can lock the energizing mechanism after opening any locking switch, so that the machine cannot be energized.

[0007] The purpose of the present application is achieved by the following technical solutions:

[0008] The mechanism is composed of an explosion-proof switch front panel assembly, three sets of explosion-proof door assemblies, three sets of main lead screw assemblies, three sets of locking switch assemblies, a main shaft locking assembly and a locking switch special tool. The explosion-proof door assembly is connected to the explosion-proof switch front panel through door shafts and fasteners, and can be moved left and right by operating the eccentric shaft to seal the door. When the seal is released, the door can be opened by rotating along the door shaft 21. The main lead screw assembly is fixed to the explosion-proof switch front panel through the main lead screw sliding bearing, and can be rotated but not moved. The locking switch assembly is fixed to the explosion-proof switch front panel through the locking switch sliding bearing, and can be rotated and moved. The main shaft locking assembly is fixed to the back of the explosion-proof switch front panel through fasteners on the three inner plates of the explosion-proof switch front panel, and is connected by a connecting steel bar for common left and right movement.

[0009] Further, the explosion-proof switch front panel assembly is composed of an explosion-proof switch front panel, three main screw sliding bearings, three closed switch sliding bearings, three closed blocks, a front panel explosion-proof surface, and a plurality of front panel closed rack teeth, wherein the main screw sliding bearings and the closed switch sliding bearings are made of brass and are press-fitted into the pre-made holes of the front panel by interference fit, the closed blocks are welded to the back of the explosion-proof switch front panel, and the closed rack teeth of the explosion-proof surface are directly machined from the explosion-proof switch front panel;

[0010] Further, the explosion-proof door assembly is composed of a door shaft, an eccentric shaft, a translation shaft, a translation shaft seat, an explosion-proof door body, a closed pressing plate, an explosion-proof door explosion-proof surface, and an explosion-proof door closed rack teeth, wherein the front panel explosion-proof surface and the explosion-proof door explosion-proof surface are in close contact with each other, the explosion-proof door closed rack teeth and the front panel closed rack teeth are tightly hooked with each other, the sealing of the explosion-proof switch is realized, the door is opened, the eccentric shaft is rotated, the translation shaft and the translation shaft seat door shaft can make the explosion-proof door body translate a small distance, so that the explosion-proof door closed rack teeth and the front panel closed rack teeth are opened, and the closed pressing plate is fixed above the explosion-proof door body by fasteners,

[0011] Further, the main screw assembly is composed of a main screw, a screw nut assembly, a spring block, a main screw spring, a main screw rotation limiting block, and a main screw handle, wherein the main screw rotation limiting block is fixed to the main screw by a top pin, the spring block can slide along the main screw, and the two are kept in a spring-open state by the main screw spring, the main screw handle drives the main screw to rotate, and the screw nut assembly can move forward and backward;

[0012] Further, the closed switch assembly is composed of a gear, a semicircular block, a closed switch main shaft, a closed switch spring, and a closed outer pressing block, wherein the gear, the semicircular block, and the closed outer pressing block are all fixed to the corresponding positions of the closed switch main shaft by a top pin or a fastener, the closed switch spring is located between the closed outer pressing block and the explosion-proof switch front panel, and is kept in a spring-open state;

[0013] Further, the main shaft closed assembly is composed of a rack, a connecting steel bar, three explosion-proof switch front panel inner plates, three optical shafts, three sets of rotation limiting block card slots, three C-shaped card slots, and three U-shaped trolleys, wherein the optical shafts are fixed to the explosion-proof switch front panel inner plates through shaft seats, the rotation limiting block card slots and the C-shaped card slots are fixed to the inside of the U-shaped trolleys through fasteners, the U-shaped trolleys can slide left and right along the optical shafts, the rack is fixed to the connecting steel bar, the rack and the gear are in meshing relationship, and the connecting steel bar connects the three U-shaped trolleys through fasteners to make them move left and right together;

[0014] Further, under normal working condition of the switch, the elastic block is clamped into the C-shaped clamping groove under the action of the spring, causing the U-shaped trolley, the rack, the gear and other related components to be locked, at this time, the convex end of the locking outer pressure block is below, the flat end is above, the convex end of the locking outer pressure block is clamped with the convex end of the locking outer pressure block, causing the explosion door body to be unable to move left and right, the door cannot be opened;

[0015] Further, when the rotation of the three main lead screw handles is completed and the internal commutator is powered off, the three elastic blocks are pushed out 10mm by the three groups of lead screw nut assemblies, the C-shaped clamping groove is separated from the elastic block, at this time, the U-shaped trolley, the rack and other related components can move left, and the gear can rotate clockwise;

[0016] Further, after rotating any one of the locking outer pressure blocks 180 degrees, the other two locking outer pressure blocks are also rotated synchronously, the convex end is above, the flat end is below, the three U-shaped trolleys, the three racks and other related components move left 42mm, at this time, the main lead screw rotation limiting block is clamped in the rotation limiting block clamping groove and cannot rotate, the main lead screw is locked, at the same time, the convex end of the locking outer pressure block is clamped with the convex end of the locking outer pressure block, and the explosion door body can move right,

[0017] Further, the explosion door body moves right 15mm by rotating the eccentric shaft, the explosion door locking rack front panel locking rack is misaligned, and the explosion door is opened.

[0018] Further, after the explosion door is opened, the locking switch assembly is pushed out 10mm forward under the action of the locking switch spring, the flat end of the semicircular clamping block is clamped into the locking clamping block, the locking switch assembly is locked and cannot rotate.

[0019] Further, the use method of the mechanism is as follows:

[0020] I. Rotate the three main lead screw handles to complete the internal commutator power-off;

[0021] II. Use the special tool of the locking switch, insert the front fork into the two small holes of any one of the locking outer pressure blocks, and rotate clockwise by 180 degrees;

[0022] III. After rotating the eccentric shaft by 120 degrees, the door can be opened. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting the present application are used to provide a further understanding of the present application, the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 Front view

[0025] Figure 2Explosion-proof switch front panel assembly and explosion-proof door assembly two door open

[0026] Figure 3 Main screw assembly, lock switch assembly, main shaft lock assembly back view

[0027] Figure 4 Main screw assembly, lock switch assembly, main shaft lock assembly front view normal working state

[0028] Figure 5 Switch is completely powered off, in line with the state when opening the lock switch

[0029] Figure 6 The state of opening the lock switch

[0030] Figure 7 The state after opening the door

[0031] Figure 8 Lock switch open and close position

[0032] In the figure:

[0033] 10, explosion-proof switch front panel assembly, 20, explosion-proof door assembly, 30, main screw assembly, 40, lock switch assembly, 50, main screw lock assembly, 60, lock switch special tool;

[0034] 11, explosion-proof switch front panel, 12, main screw sliding bearing, 13, lock switch sliding bearing, 14, lock block, 15, front panel explosion-proof surface, 16, front panel lock rack;

[0035] 21, door shaft, 22, eccentric shaft, 23, translation shaft, 24, translation shaft seat, 25, explosion-proof door body, 26, lock pressing plate, 27, explosion-proof door explosion-proof surface, 28, explosion-proof door lock rack;

[0036] 31 main screw, 32 screw nut assembly, 33 elastic block, 34 main screw spring, 35 main screw rotation limiting block, 36 main screw handle;

[0037] 41 gear, 42 half-round block, 43 lock switch main shaft, 44 lock switch spring, 45 lock outer pressing block;

[0038] 51, rack, 52, connecting steel bar, 53, explosion-proof switch front panel inner plate, 54, optical axis, 55, rotation limiting block clamping groove, 56, C-shaped clamping groove, 57, U-shaped trolley. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described in detail and clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. For example, Figures 1-8The application discloses an explosion-proof electric switch with a weak current test function and an operating method thereof

[0040] The specific implementation is as follows:

[0041] I. Under the normal working condition of the switch, the elastic block 33 is clamped into the C-shaped clamping groove 56 under the action of the spring, related components such as the U-shaped trolley 57 and the rack 51 and the gear 41 are locked, at this time, the convex end of the locking outer pressing block 45 is located below, the flat end is located above, the convex end of the locking outer pressing block 45 is clamped with the convex end of the locking pressing plate 26, the explosion-proof door body 25 cannot be moved left and right, the front plate of the explosion-proof door locking rack 28 is locked with the locking rack 16, and the door cannot be opened.

[0042] II. When the rotation of the three main lead screw handles 36 is completed and the internal commutator is powered off, the three elastic blocks 33 are pushed out by 10 mm by the three groups of lead screw nut assemblies 32, the C-shaped clamping groove 56 is disengaged from the elastic block 33, at this time, the related components such as the U-shaped trolley 57 and the rack 51 can be moved to the left, and the gear 41 can be rotated clockwise.

[0043] III. After the clockwise rotation of any one of the locking outer pressing blocks 45 by 180 degrees, the other two locking outer pressing blocks 45 are synchronously rotated, the convex end is located above, the flat end is located below, the three U-shaped trolleys 57 and the three racks 51 and other related components are moved to the left by 42 mm, at this time, the main lead screw rotation limiting block 35 is clamped in the rotation limiting block clamping groove 55 and cannot be rotated, the main lead screw 31 is locked, meanwhile, the convex end of the locking outer pressing block 45 is disengaged from the convex end of the locking pressing plate 26, and the explosion-proof door body 25 can be moved to the right.

[0044] IV. The rotation of the eccentric shaft 22 moves the explosion-proof door body 25 to the right by 15 mm, the front plate of the explosion-proof door locking rack 28 is disengaged from the locking rack 16, and the explosion-proof door is opened.

[0045] V. After the explosion-proof door is opened, the locking switch assembly 40 is pushed out by 10 mm under the action of the locking switch spring 44, the flat end of the semicircular clamping block 42 is clamped into the locking clamping block 14, the locking switch assembly 40 is locked and cannot be rotated.

[0046] The use method of the mechanism is as follows:

[0047] I. Rotate the three main lead screw handles 36 until the internal commutator is powered off;

[0048] II. The special tool 60 for the locking switch is used, the front fork is inserted into the two small holes of any one of the locking outer pressing blocks 45, and the clockwise rotation is by 180 degrees.

[0049] III. After the rotation of the eccentric shaft 22 by 120 degrees, the door can be opened.

[0050] It should be understood that the technical solutions of the present application described above with the preferred embodiments are illustrative rather than limiting. Based on the description of the present application, those skilled in the art can modify the technical solutions recorded in the embodiments, or make equivalent substitutions for part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A three gate latching mechanism for an electrically commutated switch and method of use, characterized by: The mechanism is composed of an explosion-proof switch front panel assembly (10), three sets of explosion-proof door assemblies (20), three sets of main lead screw assemblies (30), three sets of lockout switch assemblies (40), a main shaft lockout assembly (50), and a lockout switch special tool (60). The explosion-proof door assembly (20) is connected to the explosion-proof switch front panel (11) through a door shaft (21) part and fasteners, and can be moved left and right to seal the door by operating an eccentric shaft (22). When the seal is released, the door can be opened by rotating along the door shaft (21). The main lead screw assembly (30) is fixed to the explosion-proof switch front panel (11) through main lead screw sliding bearings (12) and can be rotated but not moved. The lockout switch assembly (40) is fixed to the explosion-proof switch front panel (11) through lockout switch sliding bearings (13) and can be moved and rotated. The main shaft lockout assembly is fixed to the back of the explosion-proof switch front panel through fasteners, with three explosion-proof switch front panel inner plates (53) connected by a connecting steel bar (52) and moving left and right together. The explosion-proof switch front panel assembly (10) is composed of an explosion-proof switch front panel (11), three main lead screw sliding bearings (12), three lockout switch sliding bearings (13), three lockout blocks (14), a front panel explosion-proof surface (15), and a plurality of front panel lockout racks (16). The main lead screw sliding bearings (12) and the lockout switch sliding bearings (13) are made of brass and are pressed into the preformed holes of the front panel through interference fit. The lockout blocks (14) are welded to the back of the explosion-proof switch front panel (11). The lockout racks (16) are directly machined from the explosion-proof switch front panel (11). The explosion-proof door assembly (20) is composed of a door shaft (21), an eccentric shaft (22), a translation shaft (23), a translation shaft seat (24), an explosion-proof door body (25), a lockout pressing plate (26), an explosion-proof door explosion-proof surface (27), and an explosion-proof door lockout rack (28). When working normally, the front panel explosion-proof surface (15) and the explosion-proof door explosion-proof surface (27) are in close contact with each other, and the explosion-proof door lockout rack (28) and the front panel lockout rack (16) are tightly hooked together to achieve sealing of the explosion-proof switch. When opening the door, rotating the eccentric shaft (22) and the translation shaft and translation shaft seat door shaft (21) can make the explosion-proof door body (25) translate a small distance, thereby opening the hooking between the explosion-proof door lockout rack (28) and the front panel lockout rack (16). Continue to open the door, and the lockout pressing plate (26) is fixed above the explosion-proof door body (25) by fasteners, The main lead screw assembly (30) is composed of a main lead screw (31), a lead screw nut assembly (32), a spring block (33), a main lead screw spring (34), a main lead screw rotation limiting block (35), and a main lead screw handle (36). The main lead screw rotation limiting block (35) is fixed on the main lead screw (31) by a top wire. The spring block (33) can slide along the main lead screw (31), and the two are connected by the main lead screw spring (34) to keep a spring-open state. Rotating the main lead screw (31) through the main lead screw handle (36) can make the lead screw nut assembly (32) move forward and backward. The locking switch assembly (40) is composed of a gear (41), a semicircular clamping block (42), a locking switch main shaft (43), a locking switch spring (44), and a locking outer pressure block (45). The gear (41), the semicircular clamping block (42), and the locking outer pressure block (45) are all fixed on the locking switch main shaft (43) at corresponding positions by a top wire or a fastener. The locking switch spring (44) is located between the locking outer pressure block (45) and the front panel (11) of the explosion-proof switch and keeps a pop-up state. The main shaft locking assembly (50) is composed of a rack (51), a connecting steel bar (52), three inner panels (53) of the front panel of the explosion-proof switch, three optical shafts (54), three sets of rotating limiting block clamping grooves (55), three C-shaped clamping grooves (56), and three U-shaped pulleys (57). The optical shaft (54) is fixed to the inner panel (53) of the front panel of the explosion-proof switch through a shaft seat. The rotating limiting block clamping groove (55) and the C-shaped clamping groove (56) are fixed inside the U-shaped pulley (57) through a fastener. The U-shaped pulley (57) can slide left and right along the optical shaft (54). The rack (51) is fixed to the connecting steel bar (52). The rack (51) and the gear (41) are engaged with each other. The connecting steel bar (52) is connected to the three U-shaped pulleys (57) through a fastener, so that they move left and right together.

2. A three gate latching mechanism for an electrically commutated switch and method of use according to claim 1, wherein, Under normal working conditions of the switch, the elastic block (33) is clamped into the C-shaped clamping groove (56) under the action of the spring, causing the U-shaped pulley (57), the rack (51), and the gear (41) to be locked. At this time, the locking outer pressure block (45) cannot be rotated, the convex end is below, the flat end is above, the protrusion on the inner side of the locking pressure plate (26) is clamped with the locking outer pressure block (45), causing the explosion door body (25) to be unable to move left and right, the explosion door locking rack (28) is locked with the front panel locking rack (16), and the door cannot be opened. When the three main screw handles (36) are all rotated to complete the internal commutator power-off, the three elastic blocks (33) are pushed out 10 mm by the three sets of screw nut assemblies (32), the C-shaped clamping groove (56) is separated from the elastic block (33), at this time, the U-shaped pulley (57), the rack (51), and the related components can move left, and the gear (41) can rotate clockwise. After rotating any one of the locking outer pressure blocks (45) 180 degrees, the other two locking outer pressure blocks (45) are also rotated synchronously, the convex end is above, the flat end is below, the three U-shaped pulleys (57), the three racks (51), and the related components move left by 42 mm, at this time, the main screw rotating limiting block (35) is clamped in the rotating limiting block clamping groove (55) and cannot be rotated, the main screw (31) is locked, at the same time, the protrusion on the inner side of the locking pressure plate (26) is clamped with the locking outer pressure block (45), the explosion door body (25) can move right, Rotate the eccentric shaft (22), the explosion door body (25) moves right by 15 mm, the explosion door locking rack (28) is offset from the front panel locking rack (16), and the explosion door is opened. After the explosion-proof door is opened, the locking switch assembly (40) is popped out 10 mm forward under the action of the locking switch spring (44), and the flat end of the semicircular clamping block (42) is clamped into the locking clamping block (14), so that the locking switch assembly (40) is locked and cannot be rotated; The use method of the mechanism is as follows: I. Rotate the three main screw handles (36) to complete the internal commutator power-off; II. Use the locking switch special tool (60), insert the front fork into the two small holes of any one locking outer pressing block (45), and rotate clockwise by 180 degrees; III. After rotating the eccentric shaft (22) by 120 degrees, the door can be opened.

Images