An explosion-proof electric switch with weak current test function and operation method

Abstract

The application discloses an explosion-proof electric switch with weak current test function and an operating method. The system adds a clutch pull rod, a secondary screw rod assembly, a shifting piece assembly, a clutch lever and the like on the basis of the original quick-release electric commutating combined switch. The mechanism operates by operating the primary screw rod, the clutch pull rod, the secondary screw rod assembly and the like. The weak current control system of the electric commutator assembly is disconnected first, then the high-voltage main power of the electric commutator assembly is disconnected, then the transformer takes power from the high-voltage end and converts it into low-voltage power, and finally the weak current control system is connected again. After these actions are completed, the weak current system can be debugged alone. Since the high-voltage main power is disconnected, the weak current control system is debugged at this time, and even if the control program has a problem, the switch will not be damaged. The application can reduce the difficulty of switch testing, reduce the cost of switch damage caused by control program problems, and improve safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of combined switch for coal mine, a kind of weak electric test function's explosion-proof electric switch and operating method. BACKGROUND

[0002] In the mine, electric commutating combined switch is used as the main control mechanism of conveyor, transfer machine and hydraulic pump station, and is used in large quantity and various types.The switch generally controls high voltage above 3300V and large current above 400A, so once there is a defect in design or manufacture, it will cause a big accident in actual commissioning process.Therefore, an explosion-proof electric switch capable of disconnecting strong electricity after product completion and testing weak electricity alone becomes the focus and difficulty of design. SUMMARY

[0003] In view of this, the present application provides an explosion-proof electric switch with weak electric test function,

[0004] Further, the switch can drive the sequential action of a plurality of mechanisms inside the box body through two rotating handles and a plug handle outside the box body,

[0005] Further, the switch can disconnect the main high-voltage circuit inside the box body before testing the new product, test the low-voltage control circuit of the switch alone, and exit the test function after testing without error, so that the switch can be officially used;If the program or hardware has a problem, the corresponding error will also be displayed, and serious accidents such as switch damage and explosion will not occur.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The mechanism is composed of electric commutation switch structural parts, auxiliary lead screw assembly, clutch pull rod assembly (30), main lead screw assembly, transformer assembly, trolley assembly, moving contact assembly, electric commutator assembly and back plate assembly.The auxiliary lead screw assembly and the main lead screw assembly are fixed on the front panel of the electric commutation switch structural parts by rolling bearings and can rotate.The clutch pull rod assembly is fixed on the front panel of the electric commutation switch structural parts by sliding bearings and can be pushed and pulled.The transformer assembly and the electric commutator assembly are fixed in the electric commutation switch structural parts by fasteners.The trolley assembly can move forward and backward.The moving contact assembly can move up and down.The back plate assembly can move forward and backward.

[0008] Further, the electrically operated commutator switch structure is composed of a 4mm lead screw, a chain wheel, a chain, an inert chain wheel, a connecting plate clamping groove, a track, a cylindrical slide rail and an outer box. The 4mm lead screw is fixed in the outer box through a lead screw base. The chain wheel is fixed with the 4mm lead screw through a flat key. The chain is connected with several related moving parts. The inner box is fixed in the outer box through bottom bolts. A long circular hole is cut by laser at a determined position, which is the track. The cylindrical slide rail is fixed in the inner box.

[0009] Further, the sub-lead screw assembly is composed of a sub-lead screw handle, a sub-lead screw, a sub-lead screw nut and a connecting plate. The sub-lead screw handle and the sub-lead screw are fixed together through a flat key and a bolt. The two sub-lead screw nuts and the connecting plate are fixed together through a bolt. The sub-lead screw nut can move forward and backward by rotating the sub-lead screw. The lower end of the connecting plate is inserted into the connecting plate clamping groove to achieve the purpose of only being able to move horizontally and not being able to rotate.

[0010] Further, the clutch pull rod assembly is composed of a clutch lever, a transmission rod, a clutch lever transmission pin, a clamping fork, a clutch handle, a bearing and a main lead screw shifting piece assembly. The clutch lever transmission pin is fixed in the corresponding position of the outer box. The left end of the clutch lever is connected with the transmission rod. The right side is connected with the main lead screw shifting piece assembly and rotates around the clutch lever transmission pin. The clamping fork, the clutch pull rod and the clutch handle are fixed together through fasteners. The bearing is fixed in the main lead screw shifting piece assembly through fasteners to perform the clutch action of the main shaft.

[0011] Further, the main lead screw assembly is composed of a sliding wheel, a positioning pin, a power pin, a bearing seat (44), a main lead screw chain wheel, a main lead screw and a main lead screw handle. The positioning pin is embedded in the main lead screw. The sliding wheel can move forward and backward along the main lead screw, but cannot rotate. The main lead screw chain wheel can rotate relative to the main lead screw, but cannot move forward and backward. The rotation of the main lead screw handle is transmitted to the sliding wheel through the main lead screw (46). Two power pins are fixed on the sliding wheel. The power pins are inserted into or out of the main lead screw chain wheel by the main lead screw shifting piece assembly, so as to determine whether the movement is transmitted to the main lead screw chain wheel.

[0012] Further, the transformer assembly is composed of a transformer static contact, a transformer box, a transformer main terminal post, a handle, a gear, a rack and a rotating shaft. The handle, the transmission shaft and the gear are fixed together through fasteners. Rotating the handle can drive the left and right movement of the rack. The exposed end of the rack can be inserted into the hole of the connecting plate. The rotation of the sub-lead screw can move the transformer assembly as a whole forward and backward.

[0013] Further, the trolley assembly is composed of a main lead screw nut, an upper connecting plate, a lower connecting plate (63), a sliding bearing and a small track plate. Each part is composed of fasteners or welding. The small track is processed by laser cutting the small track plate.

[0014] Further, the moving contact assembly is composed of a moving contact holder, a moving contact, a sliding bearing, and a horizontal shaft, each component is fixed by a fastener, the sliding bearing cooperates with the cylindrical slide rail, the horizontal shaft cooperates with the track and the small track, and the two cooperation conditions enable the moving contact assembly to move up and down under the forward and backward movement of the trolley assembly.

[0015] Further, the electric commutator assembly is composed of an electric commutation module, a commutator main terminal, and a commutator stationary contact.

[0016] Further, the back plate assembly is composed of an upper cross beam, an electric commutator back plate, a back plate jack, a lower cross beam, and a 4mm lead screw nut, the 4mm lead screw nut cooperates with the 4mm lead screw, the movement of the chain converts the rotation of the main lead screw into the forward and backward movement of the back plate assembly, and then the transformer main terminal and the commutator main terminal are sleeved in the back plate jack to obtain or disconnect high-voltage electricity.

[0017] Further, during the process of counterclockwise rotation of the main lead screw from 0.5 to 3 turns, the moving contact assembly moves upward at a uniform speed of 15mm, and during the process of the main lead screw from 0 to 10 turns, the back plate assembly moves at a uniform speed of 40mm, at this time, there are two modes to choose from, a normal disconnection mode and a test mode,

[0018] I. Normal disconnection mode: continue to rotate the main lead screw counterclockwise from 10 to 12 turns, and the back plate assembly continues to move backward by 12mm;

[0019] II. Test mode: pull the clutch handle by 10mm, the main lead screw tab assembly drives the sliding wheel to move backward by 10mm, the main lead screw temporarily breaks the motion transmission relationship with the main lead screw sprocket, at this time, rotate the main lead screw clockwise from 12 to 0 turns, and the moving contact assembly descends at a uniform speed of 15mm;

[0020] Further, the test function of the switch is used as follows:

[0021] I. Rotate the main lead screw handle counterclockwise from 0 turns to 0.5 turns, during this process, the trolley assembly moves backward by 5mm under the action of the main lead screw, the main lead screw sprocket drives the four 4mm lead screws to rotate clockwise through the chain (13), and the back plate assembly moves backward by 2mm;

[0022] II. Continue to rotate the main screw handle counterclockwise from 0.5 to 3 turns, in this process, the trolley assembly moves backward from 5mm to 30mm, the track, the small rail and the cross shaft jointly act, the moving contact assembly uniformly lifts 15mm, the moving contact lifts from 0 to 3mm at the end of the first turn, and the separation of the transformer static contact and the commutator static contact is completed, at the end of the third turn, it is lifted to 15mm, at this time, the distance between the moving contact and the transformer static contact and the commutator static contact reaches 12mm, and it does not move in the subsequent process, the backboard assembly continues to move backward, at the end of the third turn, it moves to 12mm, at this time, the commutator main terminal, the transformer main terminal and the backboard jack are just separated, and the high-voltage main is disconnected;

[0023] III. Continue to rotate the main screw handle counterclockwise from 3 to 10 turns, in this process, the trolley assembly moves backward from 30mm to 100mm, the backboard assembly continues to move backward, at the end of the 10th turn, it moves to 40mm. At this time, the distance between the commutator main terminal, the transformer main terminal (53) and the backboard jack is 28mm;

[0024] IV. Pull the clutch handle from 0-10mm, in this process, through the action of the clutch lever, the bearing of the main screw handle pushes the sliding wheel backward by 10mm, the power pin of the sliding wheel is out of the corresponding hole of the main screw handle chain wheel, and the motion transmission relationship between the two is temporarily disconnected;

[0025] V. Rotate the secondary screw handle counterclockwise from 0 to 2 turns, in this process, the connecting plate drives the transformer assembly to move backward, at the end of the second turn, it moves to 40mm, the transformer main terminal is inserted into the backboard jack by 12mm, and the power of the transformer assembly is completed,

[0026] VI. Rotate the main screw handle clockwise from 10 to 0 turns, in this process, the trolley assembly moves forward by 100mm, the moving contact assembly moves downward by 15mm, and the contact between the moving contact and the static contact is completed. At this time, the weak current system of the switch is completely connected, and the strong current system is disconnected, so that the control system test of the switch can be carried out; BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings constituting the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0028] Figure 1 General view (half cut from the right shell);

[0029] Figure 2 Electric commutating switch structure;

[0030] Figure 3 Secondary screw assembly, clutch pull rod assembly, main screw assembly;

[0031] Figure 4 Main screw assembly debugging state diagram;

[0032] Figure 5 Trolley assembly;

[0033] Figure 6 Transformer assembly, electric commutator assembly and moving contact assembly;

[0034] Figure 7 Back plate assembly;

[0035] Figure 8 Normal working state plan view;

[0036] Figure 9 Debugging state plan view;

[0037] In the figure:

[0038] 10, electric commutator switch structure, 11, 4mm lead screw, 12, chain wheel, 13, chain, 14, inert chain wheel, 15, connecting plate clamping groove, 16, track, 17, cylindrical slide rail, 18, inner box, 19, outer box;

[0039] 20, sub-screw assembly, 21, sub-screw handle, 22, sub-screw, 23, sub-screw nut, 24, connecting plate;

[0040] 30, clutch lever assembly, 31, clutch lever, 32, transmission rod, 33, clutch lever transmission pin, 34, clamping position shift fork, 35, clutch handle, 36, bearing, 37, main screw shift piece assembly;

[0041] 40, main screw assembly, 41, sliding wheel, 42, positioning pin, 43, power pin, 44, bearing seat, 45, main screw chain wheel, 46, main screw, 47, main screw handle;

[0042] 50, transformer assembly, 51, transformer static contact, 52, transformer box, 53, transformer main terminal, 54, handle, 55, gear, 56, rack, 57, rotating shaft;

[0043] 60, trolley assembly, 61, main screw nut, 62, upper connecting plate, 63, lower connecting plate, 64, first sliding bearing, 65, small track plate, 66, small track;

[0044] 70, moving contact assembly, 71, moving contact holder, 72, moving contact, 73, second sliding bearing, 74, cross shaft;

[0045] 80, electric commutator assembly, 81, electric commutator module, 82, commutator main terminal, 83, commutator static contact;

[0046] 90, back plate assembly, 91, upper crossbeam, 92 electric commutator back plate, 93, back plate jack 94, lower crossbeam, 95, 4mm lead screw nut. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described completely and clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all.

[0048] As shown in the figure, an explosion-proof electric switch with weak current test function and an operating method Figures 1-9 DETAILED DESCRIPTION

[0050] I. Rotate the main screw handle counterclockwise from 0 to 0.5 turns. During this process, the trolley assembly moves backward 5mm under the action of the main screw, and the main screw sprocket drives the four 4mm lead screws to rotate clockwise through the chain (13), and the back plate assembly moves backward 2mm.

[0051] II. Continue to rotate the main screw handle counterclockwise from 0.5 to 3 turns. During this process, the trolley assembly moves backward from 5mm to 30mm, and the track, the small track and the horizontal shaft jointly act on the moving contact assembly to uniformly lift it by 15mm. At the end of the first turn, the moving contact is lifted by 3mm from 0, completing the separation from the transformer static contact and the commutator static contact. At the end of the third turn, it is lifted to 15mm. At this time, the distance between the moving contact and the transformer static contact and the commutator static contact reaches 12mm, and it will not move in the subsequent process. The back plate assembly continues to move backward, and at the end of the third turn, it moves to 12mm. At this time, the commutator main terminal, the transformer main terminal and the back plate jack are just separated, and the high-voltage main power is disconnected.

[0052] III. Continue to rotate the main screw handle counterclockwise from 3 to 10 turns. During this process, the trolley assembly moves backward from 30mm to 100mm, and the back plate assembly continues to move backward. At the end of the 10th turn, it moves to 40mm. At this time, the distance between the commutator main terminal, the transformer main terminal (53) and the back plate jack is 28mm.

[0053] IV. Pull the clutch handle from 0 to 10mm. During this process, the bearing of the main screw handle assembly drives the sliding wheel to move backward 10mm through the action of the clutch lever, and the power pin of the sliding wheel is disconnected from the corresponding hole of the main screw sprocket, temporarily breaking the motion transmission relationship between the two.

[0054] V. Rotate the auxiliary screw handle counterclockwise from 0 to 2 turns. During this process, the connecting plate drives the transformer assembly to move backward. At the end of the second turn, it moves to 40mm, and the transformer main terminal is inserted into the back plate jack by 12mm, completing the power-on of the transformer assembly. ​

[0055] Six, clockwise rotation of the main screw handle from 10 to 0 turns, in the process, the trolley assembly forward movement 100mm, the moving contact assembly downward movement 15mm, the contact between the moving and static contact is completed. At this time, the switch of the weak current system is connected, and the strong current system is disconnected, and the control system test of the switch can be carried out;

[0056] It should be understood that the above detailed description of the technical solutions of the present application by means of the preferred embodiments is illustrative but not 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 replacement for part of the technical features, and these modifications or replacements 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. An explosion-proof electric switch with low-voltage testing function, characterized in that: The explosion-proof electric switch is composed of an electric commutator switch structural part (10), a secondary screw rod assembly (20), a clutch pull rod assembly (30), a main screw rod assembly (40), a transformer assembly (50), a trolley assembly (60), a moving contact assembly (70), an electric commutator assembly (80), and a back plate assembly (90). The secondary screw rod assembly (20) and the main screw rod assembly (40) are fixed on the front panel of the electric commutator switch structural part (10) through rolling bearings, and can rotate. The clutch pull rod assembly (30) is fixed on the front panel of the electric commutator switch structural part (10) through sliding bearings, and can be pushed and pulled. The transformer assembly (50) and the electric commutator assembly (80) are fixed in the electric commutator switch structural part (10) through fasteners. The trolley assembly (60) can move forward and backward. The moving contact assembly (70) can move up and down. The back plate assembly (90) can move forward and backward. The electric commutator switch structural part (10) is composed of a 4mm lead screw (11), a chain wheel (12), a chain (13), an inert chain wheel (14), a connecting plate clamping groove (15), a track (16), a cylindrical slide rail (17), and an outer box body (19). The 4mm lead screw (11) is fixed in the outer box body (19) through a lead screw base. The chain wheel (12) is fixed with the 4mm lead screw (11) through a flat key. The chain (13) is connected with a plurality of related moving parts. An inner box body (18) is fixed in the outer box body (19) through bottom bolts. A long circular hole is cut by laser at a determined position, which is the track (16). The cylindrical slide rail (17) is fixed in the inner box body, The secondary screw rod assembly (20) is composed of a secondary screw rod handle (21), a secondary screw rod (22), a secondary screw rod nut (23), and a connecting plate (24). The secondary screw rod handle (21) and the secondary screw rod (22) are fixed together through a flat key and a bolt. Two secondary screw rod nuts (23) and the connecting plate (24) are fixed together through a bolt. The two secondary screw rod nuts (23) and the connecting plate (24) can move forward and backward through the rotation of the secondary screw rod (22). The lower end of the connecting plate (24) is inserted into the connecting plate clamping groove (15) to achieve the purpose of only being able to move horizontally and not being able to rotate. The clutch pull rod assembly (30) is composed of a clutch lever (31), a transmission rod (32), a clutch lever transmission pin (33), a clamping fork (34), a clutch handle (35), a bearing (36), and a main screw rod tab assembly (37). The clutch lever transmission pin (33) is fixed in the corresponding position of the outer box body (19). The left end of the clutch lever (31) is connected with the transmission rod (32). The right end of the clutch lever (31) is connected with the main screw rod tab assembly (37) and rotates around the clutch lever transmission pin (33). The clamping fork (34), the clutch lever (31), and the clutch handle (35) are fixed together through fasteners. The bearing (36) is fixed in the main screw rod tab assembly (37) through fasteners to perform the clutching action of the main shaft. The main screw assembly (40) is composed of a sliding wheel (41), a positioning pin (42), a power pin (43), a bearing seat (44), a main screw chain wheel (45), a main screw (46), and a main screw handle (47). The positioning pin (42) is embedded in the main screw (46), the sliding wheel (41) can move forward and backward along the main screw but cannot rotate, the main screw chain wheel (45) can rotate relative to the main screw (46) but cannot move forward and backward, the rotation of the main screw handle (47) is transmitted to the sliding wheel (41) through the main screw (46), two power pins (43) are fixed on the sliding wheel (41), the sliding wheel (41) is actuated by the main screw lever assembly (37) to make the power pins (43) inserted into or out of the main screw chain wheel (45), and then it can be determined whether the movement is transmitted to the main screw chain wheel (45), The transformer assembly (50) is composed of a transformer static contact (51), a transformer box (52), a transformer main terminal post (53), a handle (54), a gear (55), a rack (56), and a rotating shaft (57). The handle (54), the rotating shaft (57), and the gear (55) are fixed as a whole by fasteners. Rotating the handle (54) can drive the left and right movement of the rack (56). The exposed end of the rack (56) can be inserted into the hole of the connecting plate (24) and moved forward and backward with the rotation of the auxiliary screw (22). The trolley assembly (60) is composed of a main screw nut (61), an upper connecting plate (62), a lower connecting plate (63), a first sliding bearing (64), and a small rail plate (65). Each part is fixed by fasteners or welding. The small rail (66) is processed by laser cutting the small rail plate (65). The moving contact assembly (70) is composed of a moving contact holder (71), a moving contact (72), a second sliding bearing (73), and a cross shaft (74). Each part is fixed by fasteners. The second sliding bearing (73) cooperates with the cylindrical slide rail (17). The cross shaft (74), the rail (16), and the small rail (66) cooperate. These two cooperation conditions can make the moving contact assembly (70) move up and down under the forward and backward movement of the trolley assembly (60). The electric commutator assembly (80) is composed of an electric commutation module (81), a commutator main terminal post (82), and a commutator static contact (83). The back plate assembly (90) is composed of an upper cross beam (91), an electric commutator back plate (92), a back plate jack (93), a lower cross beam (94), and a 4mm lead screw nut (95). The 4mm lead screw nut (95) cooperates with the 4mm lead screw (11). Through the movement of the chain (13), the rotation of the main screw (46) is converted into the forward and backward movement of the back plate assembly (90), and then the back plate jack (93) is inserted into the transformer main terminal post (53) and the commutator main terminal post (82) to obtain high-voltage main electricity.

2. A method of operating an explosion-proof electric switch with weak current test function as defined in claim 1, characterized in that, During the process of the main screw (46) rotating counterclockwise from 0.5 to 3 turns, the moving contact assembly (70) moves upward at a constant speed of 15 mm, and during the process of the main screw (46) rotating from 0 to 10 turns, the backboard assembly (90) moves at a constant speed of 40 mm. At this time, there are two modes to choose from, a normal disconnect mode and a test mode.

1. Normal disconnect mode: continue to rotate the main screw (45) counterclockwise from 10 to 12 turns, and the backboard assembly continues to move backward by 12 mm.

2. Test mode: pull the clutch handle (35) by 10 mm, the main screw finger assembly (37) drives the sliding wheel (41) to move backward by 10 mm, and the main screw (46) temporarily disconnects the motion transmission relationship with the main screw sprocket (45). At this time, rotate the main screw (46) clockwise from 12 to 0 turns, and the moving contact assembly (70) descends at a constant speed of 15 mm. The test function of the switch is used as follows:

1. Rotate the main screw handle (47) counterclockwise from 0 turns to 0.5 turns. During this process, the trolley assembly (60) moves backward by 5 mm under the action of the main screw (46), and the main screw sprocket (45) drives the four 4 mm lead screws (11) to rotate clockwise through the chain (13), and the backboard assembly (90) moves backward by 2 mm.

2. Continue to rotate the main screw handle (47) counterclockwise from 0.5 to 3 turns. During this process, the trolley assembly (60) moves backward from 5 mm to 30 mm, and the track (16), small track (66) and horizontal shaft (74) jointly act on the moving contact assembly (70) to uniformly lift it by 15 mm. The moving contact (72) is lifted by 3 mm at the end of the first turn, completing the separation from the transformer static contact (51) and the commutator static contact (83). At the end of the third turn, it is lifted to 15 mm. At this time, the distance between the moving contact (72) and the transformer static contact (51) and the commutator static contact (83) reaches 12 mm, and there is no further movement in the subsequent process. The backboard assembly (90) continues to move backward and reaches 12 mm at the end of the third turn. At this time, the commutator main terminal (82), the transformer main terminal (53) and the backboard jack (93) are just separated, and the high-voltage main circuit is disconnected.

3. Continue to rotate the main screw handle (47) counterclockwise from 3 to 10 turns. During this process, the trolley assembly (60) moves backward from 30 mm to 100 mm, and the backboard assembly (90) continues to move backward and reaches 40 mm at the end of the 10th turn. At this time, the distance between the commutator main terminal (82), the transformer main terminal (53) and the backboard jack (93) is 28 mm.

4. Pull the clutch handle (35) from 0 to 10 mm. During this process, the bearing (36) of the main screw finger assembly (37) drives the sliding wheel (41) to move backward by 10 mm through the action of the clutch lever (31), and the power pin (43) of the sliding wheel (41) is out of the corresponding hole position of the main screw sprocket (45), temporarily disconnecting the motion transmission relationship between the two. V. Rotate the secondary screw handle (21) counterclockwise from 0 to 2 turns. During this process, the connecting plate (24) drives the transformer assembly (50) to move backward. At the end of the second turn, the movement is 40 mm, and the transformer main terminal (53) is inserted into the backboard jack (93) by 12 mm, completing the power-on of the transformer assembly (50); VI. Rotate the main screw handle (47) clockwise from 0 to 10 turns. During this process, the trolley assembly (60) moves forward by 100 mm, and the moving contact assembly (70) moves downward by 15 mm, completing the contact between the moving contact (72) and the transformer static contact (51) and the commutator static contact (83). At this time, the weak current system of the entire explosion-proof electric switch is connected, while the strong current system is disconnected, allowing the control system test of the explosion-proof electric switch to be performed.

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