CN114144010B - High-voltage motor soft starting device - Google Patents
High-voltage motor soft starting device Download PDFInfo
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- CN114144010B CN114144010B CN202111358765.9A CN202111358765A CN114144010B CN 114144010 B CN114144010 B CN 114144010B CN 202111358765 A CN202111358765 A CN 202111358765A CN 114144010 B CN114144010 B CN 114144010B
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- rod
- thyristor
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- 239000007858 starting material Substances 0.000 claims abstract description 24
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
- H05K7/023—Stackable modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3672—Foil-like cooling fins or heat sinks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses a soft starting device of a high-voltage motor, which comprises a control cabinet, a soft starting cabinet, a soft starter and a fixer, wherein the control cabinet is connected with the soft starter; the soft starter comprises a thyristor and a radiator; a heat radiator is arranged around the heat conduction block; the heat conducting block is provided with a connecting sheet; the connecting piece is provided with a first lock rod and a second lock rod; the fixer comprises a transverse plate, a bolt, a pressing block, a fixing rod and a supporting column; the fixed rod is formed by connecting a plurality of short columns; the short column is provided with a first square block; the first square is provided with a first straight hole; a second square block is arranged on the support column; the second square is provided with a second straight hole; according to the invention, through the matching of the first lock rod and the first straight hole and the matching of the second lock rod and the second straight hole, each thyristor and the radiator are fixed, so that the damaged thyristor is convenient to disassemble and assemble, and the whole soft starter is not required to be completely disassembled, thereby facilitating the maintenance of the soft starter.
Description
Technical Field
The invention belongs to the technical field of motor soft start, and particularly relates to a soft start device of a high-voltage motor.
Background
The high-voltage motor is easy to damage the motor and a mechanical device connected with the motor at the starting moment, and in reality, a soft starting device is commonly used for applying gradually enhanced voltage to the motor, so that the motor is stably started to protect the motor and the mechanical device; soft-start devices are often composed of a plurality of electrically connected thyristors for regulating the voltage value applied to the motor, which are heated seriously when in use, and after overheating damage to the thyristors, the thyristors often need to be detached one by one until the damaged thyristors are detached, which makes maintenance work lengthy and inefficient.
Disclosure of Invention
The invention provides a high-voltage motor soft starting device which is convenient to maintain in order to overcome the defects of the prior art.
The technical scheme provided by the invention is as follows: a soft starting device of a high-voltage motor comprises a control cabinet, a soft starting cabinet arranged at the bottom of the control cabinet, a soft starter arranged in the soft starting cabinet and a fixer for fixing the soft starter; the soft starter comprises a plurality of thyristors which are sequentially arranged in the soft starter cabinet along the vertical direction, and a radiator which is positioned between two adjacent thyristors which are longitudinally arranged and used for radiating the thyristors; each layer of the thyristor is provided with two thyristors along the horizontal direction; the thyristor is fixedly connected with a radiator positioned at the bottom of the thyristor; a plurality of heat radiation bodies are arranged around the radiator; four connecting sheets are arranged on the radiator; a first lock rod and a second lock rod are arranged on the two adjacent connecting sheets in parallel; the fixer comprises a transverse plate fixed at the top of the soft start cabinet, a plurality of bolts which are installed on the transverse plate through threaded connection, a pressing block which is rotationally connected to the bottom of the bolts, two fixing rods which are inserted into two ends of the transverse plate, and a supporting column which is inserted into the middle of the transverse plate; the fixed rod is formed by connecting short columns which are sequentially arranged along the vertical direction; the short column is provided with a first square block; the first square is provided with a first straight hole; a second square block is arranged on the support column; the second square is provided with a second straight hole; the first lock rod passes through the first straight hole; the second lock rod passes through the second straight hole.
The thyristors are commonly and detachably electrically connected, and the connection mode is not repeated here; the heat conducting block is used for absorbing heat generated when the thyristor works and radiating the heat to the outside through the heat conducting sheet, so that the thyristor is prevented from being burnt out; the first lock rod is inserted into the two connecting sheets and the first straight holes which are arranged in parallel, and the second lock rod is inserted between the connecting sheets and the second straight holes which are arranged in parallel on the same heat conducting block, so that the thyristor and the heat conducting block are fixed between the fixed rod and the support column; when the thyristors are damaged due to overheat and the like, the heat conducting block and the thyristors can be taken down from between the fixed rod and the supporting rod by respectively pulling the first locking rod and the second locking rod away from the corresponding first straight hole and the second straight hole, so that the corresponding thyristors are convenient to replace, and each thyristor does not need to be taken down from the fixer one by one; the bolts and the pressing blocks are used for fixing the two rows of thyristors which are longitudinally arranged, so that the stability of the thyristors in normal operation is ensured.
Further, a stop groove is formed in the portion, inserted into the first straight hole, of the first lock rod; a notch is formed in the first square; a plurality of first wedge blocks are connected in a sliding manner in the notch; an elastic sheet is fixed between the first wedge-shaped block and the notch; the first wedge block is insertable into the stop slot.
Through the cooperation of stop groove and first wedge, after first locking lever inserts first straight hole, first wedge inserts in the stop groove, restricts the slip of first locking lever, avoids making first locking lever and first square piece be connected unstably because of external shake, prevents that the thyristor from becoming flexible.
Further, the top of the short column is connected with a ring block in a sliding manner; a first spring is fixed at the bottom of the ring block; the top of the ring block is sleeved at the bottom of another short column adjacent to the ring block; a wafer is connected in the notch in a vertically sliding manner; the bottom of the wafer is provided with a second wedge block; a square groove is formed in the first wedge-shaped block; the second wedge block can be inserted into the square groove; a plurality of round rods are arranged at the top of the wafer; the tops of the round rods penetrate out of the notch and are connected through magnetic sheets; the magnetic sheet can be in contact with the annular block.
Through the arrangement of the ring blocks, all the short columns are longitudinally connected through the ring blocks to form an integral fixed rod so as to limit the transverse and longitudinal movement of the short columns; when the thyristor is damaged, the ring block is pressed to separate the thyristor from the other short column above the thyristor, then the ring block pushes the magnetic sheet to synchronously move, so that the second wedge block is inserted into the square groove, and simultaneously pushes the first wedge block to slide to separate the first wedge block from the stop groove, the first lock rod is separated from the first straight hole, the damaged thyristor can be detached, and the thyristor and the heat conducting block arranged between the other short columns and the support column are not affected, so that the new or repaired thyristor can be conveniently installed subsequently; when the thyristor is installed, the second lock rod is inserted between the second straight hole and the connecting sheet, then the short column is moved to one side of the heat conducting block, and the bottom of the short column is embedded into the annular block of the other short column below the short column; the first spring is compressed when the ring block is pressed, so that the top of the short column moves to the position right below the other end above the short column, the first spring drives the ring block to reset and move upwards after the hand is loosened, three adjacent short columns are connected into a whole, then the first lock rod is inserted between the connecting sheet and the first straight hole, the elastic sheet drives the first wedge block to be inserted into the stop groove, and the installation of the thyristor and the heat conducting block is completed.
Further, a chute is arranged at the upper part of the short column; two symmetrically arranged third wedge-shaped blocks are connected in the sliding groove in a sliding manner; a second spring is fixed between the two third wedge blocks; a clamping groove is formed in the inner side of the ring block; a straight groove is formed in the bottom of one end of the clamping groove; the third wedge block can be embedded into the clamping groove; the bottom of the first spring is fixed on the spacing ring; the top surface of the spacing ring is provided with a plurality of inserted bars; the periphery of the ring block is provided with slots which are in one-to-one correspondence with the inserting rods; the top of the inserted link is embedded into the slot and can slide along the slot; the bottom of the spacing ring is provided with a T-shaped ring; the top of the first square block is provided with a T-shaped groove; the T-shaped ring is embedded in the T-shaped groove.
By arranging the third wedge-shaped block, when the ring block is pressed, the second spring drives the third wedge-shaped block to be embedded into the clamping groove, and the reset of the first spring is limited, so that the ring block keeps the pressing effect on the magnetic sheet, the first lock rod is conveniently pulled out from the first straight hole, and the short column is also conveniently connected with two short columns adjacent to the first lock rod; the third wedge-shaped block is opposite to the straight groove through rotating the ring block, so that the third wedge-shaped block slides along the straight groove to separate from the ring block, and the ring block is convenient to move upwards and reset; the spacer ring is used for isolating the first spring from the first square block, the T-shaped ring and the T-shaped groove are matched to enable the spacer ring to be in rotary connection with the first square block, the spacer ring synchronously rotates when the inserting rod and the inserting groove are matched to enable the ring block to rotate, and damage to the first spring when the ring block rotates is avoided.
Further, a front door is arranged on the front surface of the soft start cabinet; side doors are respectively arranged on two sides of the soft start cabinet; the top of the front door and the top of the side door are both hinged on the soft start cabinet; a plurality of cooling fans are arranged on the side door; a filter screen is arranged outside the cooling fan; two support blocks are connected to the two sides in the soft start cabinet in a sliding manner; the support block is hinged with a first connecting rod and a second connecting rod; the top of the first connecting rod is hinged to the front door; the top of the second connecting rod is fixed on the side door; a supporting rod is fixed between the two supporting blocks; a straight rod is arranged at the upper part of the soft start cabinet; a hook is rotatably connected to the straight rod; the supporting rod can fall on the hook.
The cooling fan is used for radiating heat in the soft start cabinet to the outside, so that the thyristor is prevented from overheating; the filter screen is used for filtering external dust and preventing the external dust from entering the soft start cabinet to influence the service life of the thyristor; through the arrangement of the supporting blocks, when the front door is opened, the first connecting rods drive the supporting blocks to slide upwards, and then each second connecting rod drives the side doors to be opened, so that the front door and the two side doors are opened and closed simultaneously, and the overhaul of parts in the soft start cabinet is facilitated; after the front door and the side door are opened, the supporting rod falls on the hook to limit the front door to fall off, so that the front door is in a continuous opening state, maintenance work is convenient to carry out, the front door and the side door can be closed by rotating the hook to separate the front door from the supporting rod, and the use is convenient.
Further, two sides of the soft start cabinet are respectively provided with a negative pressure cavity; a piston sheet is connected in a sliding way in the negative pressure cavity; a tension spring is fixed between the bottom of the piston piece and the negative pressure cavity; a pull rope is fixed at the top of the piston sheet; the end part of the pull rope is fixed on the supporting block; a communication port is arranged at the side of the negative pressure cavity; the length of the communication port is larger than the thickness of the piston sheet; the communication port is communicated with the outside.
Through setting up the negative pressure chamber, after couple and bracing piece break away from, the qianmen falls under the effect of gravity with the side door, the supporting shoe moves down along with it to drive the stay cord and move, the stay cord drives the piston piece and moves upwards, and the negative pressure intracavity pressure is less than the external world, and the extension spring produces the pulling force to the piston piece simultaneously, obstructs the removal of stay cord jointly, thereby reduces the whereabouts speed of qianmen and side door, avoids qianmen and side door to smash down and hurt the people; and when the piston piece moves to the negative pressure cavity and the inner side of the communication port, the upper part and the lower part of the negative pressure cavity are communicated with the outside through the communication port, and the stretching length of the tension spring is enough to buffer and reduce the falling of the front door and the side door, so that the situation that the front door and the side door cannot be closed due to overlarge negative pressure in the negative pressure cavity is avoided, and the front door and the side door are ensured to be reset normally.
In summary, according to the invention, through the cooperation of the first lock rod and the first straight hole and the cooperation of the second lock rod and the second straight hole, each thyristor and the heat conducting block are fixed, so that the damaged thyristor is convenient to disassemble and assemble, and the whole soft starter is not required to be completely disassembled, thereby facilitating the maintenance of the soft starter and improving the maintenance efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Figure 2 is an isometric cross-sectional view of the invention.
Fig. 3 is a partial enlarged view of a portion a in fig. 2.
FIG. 4 is a schematic view of the structure of the soft starter and the holder according to the present invention.
Figure 5 is an isometric cross-sectional view of a soft starter and holder of the present invention.
Fig. 6 is a schematic view of the ring block of fig. 3.
Fig. 7 is an exploded view of the soft start cabinet of fig. 1.
Figure 8 is an isometric cross-sectional view of the soft start cabinet of figure 1.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-8, a high-voltage motor soft starting device comprises a control cabinet 1, a soft starting cabinet 2 arranged at the bottom of the control cabinet 1, a soft starter 3 arranged in the soft starting cabinet 2, and a fixer 4 for fixing the soft starter 3; the soft starter 3 comprises a plurality of thyristors 31 which are sequentially arranged in the soft starter cabinet 2 along the vertical direction, and a radiator 32 which is positioned between two adjacent thyristors 31 which are longitudinally arranged and used for radiating heat of the thyristors 31; the thyristors 31 are provided two for each layer in the horizontal direction; the thyristor 31 is fixedly connected with a radiator 32 positioned at the bottom of the thyristor; a plurality of heat radiating bodies 33 are arranged around the heat radiator 32; the radiator 32 is provided with four connecting pieces 34; a first lock rod 35 and a second lock rod 36 are arranged on two adjacent connecting pieces 34 in parallel; the fixer 4 comprises a transverse plate 41 fixed at the top of the soft start cabinet 2, a plurality of bolts 42 which are installed on the transverse plate 41 through threaded connection, a pressing block 43 which is rotatably connected at the bottom of the bolts 42, two fixing rods 44 which are inserted into two ends of the transverse plate 41, and a supporting column 45 which is inserted into the middle of the transverse plate 41; the fixed rod 44 is formed by connecting short columns 46 sequentially arranged along the vertical direction; the short column 46 is provided with a first square block 47; the first square block 47 is provided with a first straight hole 471; the support column 45 is provided with a second square 451; the second square 451 is provided with a second straight hole 452; the first lock lever 35 passes through the first straight hole 471; the second lock lever 36 passes through the second straight hole 452.
The control cabinet 1 is internally provided with electronic components for controlling the work of the thyristor 31 and the motor, and the structure of the electronic components is not repeated here; the soft start cabinet 2 is used for isolating the soft starter 3 from the outside to prevent the soft starter 3 from being influenced by the outside; the thyristor 31 is commercially available, and its structure and principle are prior art; the thyristors 31 are arranged in at least five rows in the longitudinal direction and two columns in the transverse direction; the radiator 32 is a metal product with large heat conductivity and is used for radiating heat generated when the thyristor 31 works; in use, the first locking bar 35 is inserted between the connecting piece 34 and the first straight hole 471, and the second locking bar 36 is inserted between the connecting piece 34 and the second straight hole 452, so that each thyristor 31 and the radiator 32 are fixed between the fixing rod 44 and the supporting column 45; the bolt 42 is in threaded connection with the transverse plate 41 and is in rotary connection with the pressing block 43, and the pressing block 43 falls on the top of the heat conducting block 32 arranged at the uppermost part by rotating the bolt 42, so that the whole soft starter 3 is limited.
Further, a portion of the first locking lever 35 inserted into the first straight hole 471 is provided with a stopper groove 37; a notch 472 is arranged in the first block 47; a plurality of first wedge blocks 474 are slidably connected within the slot 472; an elastic piece 473 is fixed between the first wedge 474 and the notch 472; the first wedge 474 is insertable into the stop slot 37; the elastic piece 473 is a spring steel product having elasticity that pushes the first wedge 474 into the stopper groove 37 when the first lock lever 35 is inserted into the first straight hole 471, so as to restrict the first lock lever 35 from sliding.
Further, a ring block 48 is slidably connected to the top of the stub 46; a first spring 481 is fixed at the bottom of the ring block 48; the top of the ring block 48 is sleeved at the bottom of the other short column 46 adjacent to the ring block, so that the two adjacent short columns 46 are connected with each other; the notch 472 is internally and vertically connected with a wafer 475 in a sliding manner; the bottom of the wafer 475 is provided with a second wedge 476; the first wedge 474 is provided with a square groove 477, and the second wedge 476 can be inserted into the square groove 477 and pushes the first wedge 474 to slide so as to deform and shrink the elastic sheet 473; a plurality of round bars 478 are arranged at the top of the wafer 475; the top of each round rod 478 passes through the notch 472 and is connected by the magnetic sheet 479; the magnetic sheet 479 can be contacted with the ring block 48, and the ring block 48 is made of iron, so that the magnetic sheet 479 can be attracted to move synchronously; the upper part of the short column 46 is provided with a chute 49, and two symmetrically arranged third wedge-shaped blocks 491 are connected in a sliding way in the chute 49; a second spring 492 is fixed between the two third wedge pieces 491; the inner side of the ring block 48 is provided with a clamping groove 482; a straight groove 483 is arranged at the bottom of one end of the clamping groove 482; when the ring block 48 moves downwards, the third wedge-shaped block 491 can be embedded into the clamping groove 482 to limit the first spring 481 to reset, so that the ring block 48 is kept in a state of being separated from the short column 46 above the ring block 48, and the third wedge-shaped block 491 can be opposite to the straight groove 483 by rotating the ring block 48, so that the first spring 481 drives the ring block 48 to reset; the bottom of the first spring 481 is fixed on the spacer 484; the top surface of the spacer 484 is provided with a plurality of inserting rods 485; the periphery of the ring block 48 is provided with slots 486 which are in one-to-one correspondence with the inserting rods 485; the top of the insert bar 485 is embedded into the slot 486 and can slide along the slot 486; a T-shaped ring 487 is arranged at the bottom of the spacer 484; the top of the first block 47 is provided with a T-shaped groove 470; t-ring 487 is embedded within T-slot 470.
Further, a front door 21 is arranged on the front surface of the soft start cabinet 2; side doors 22 are respectively arranged on two sides of the soft start cabinet 2; the top of the front door 21 and the top of the side door 22 are both hinged on the soft start cabinet 2; a plurality of cooling fans 23 are mounted on the side door 22; the outside of the cooling fan 23 is provided with a filter screen 24; two support blocks 25 are connected to the two sides in the soft start cabinet 2 in a sliding manner; the supporting block 25 is hinged with a first connecting rod 251 and a second connecting rod 252; the top of the first connecting rod 251 is hinged on the front door 21; the top of the second connecting rod 252 is fixed on the side door 22; a support rod 253 is fixed between the two support blocks 25; the upper part of the soft start cabinet 2 is provided with a straight rod 26; the straight rod 26 is rotatably connected with a hook 27; the support rod 253 can be dropped onto the hook 27.
Further, a negative pressure cavity 28 is respectively arranged at two sides of the soft start cabinet 2; a piston sheet 281 is slidably connected to the negative pressure chamber 28; a tension spring 282 is fixed between the bottom of the piston piece 281 and the negative pressure cavity 28; a pull rope 283 is fixed on the top of the piston piece 281; the end of the stay 283 is fixed on the supporting block 25; a communication port 284 is arranged at the side of the negative pressure cavity 28; the length of the communication port 284 is greater than the thickness of the piston sheet 281, so that when the piston sheet moves to the inside of the communication port, the upper and lower portions formed by the piston sheet 281 in the negative pressure chamber 28 communicate with the outside through the communication port 284.
The foregoing description of the preferred embodiments of the present invention is provided for illustration and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed, and all changes made within the scope of the invention as independently claimed are within the scope of the invention.
Claims (3)
1. A soft starting device of a high-voltage motor comprises a control cabinet (1), a soft starting cabinet (2) arranged at the bottom of the control cabinet (1), a soft starter (3) arranged in the soft starting cabinet (2), and a fixer (4) for fixing the soft starter (3); the method is characterized in that: the soft starter (3) comprises a plurality of thyristors (31) which are sequentially arranged in the soft starter cabinet (2) along the vertical direction, and a radiator (32) which is positioned between two adjacent thyristors (31) which are longitudinally arranged and used for radiating heat of the thyristors (31); each layer of the thyristor (31) is provided with two thyristors along the horizontal direction; the thyristor (31) is fixedly connected with a radiator (32) positioned at the bottom of the thyristor; a plurality of heat radiation bodies (33) are arranged around the heat radiator (32); four connecting pieces (34) are arranged on the radiator (32); a first lock rod (35) and a second lock rod (36) are arranged on two adjacent connecting pieces (34) in parallel; the fixer (4) comprises a transverse plate (41) fixed at the top of the soft start cabinet (2), a plurality of bolts (42) which are installed on the transverse plate (41) through threaded connection, a pressing block (43) which is rotationally connected to the bottom of the bolts (42), two fixing rods (44) which are inserted into two ends of the transverse plate (41), and a supporting column (45) which is inserted into the middle of the transverse plate (41); the fixed rod (44) is formed by connecting short columns (46) which are sequentially arranged along the vertical direction; the short column (46) is provided with a first square block (47); a first straight hole (471) is formed in the first square block (47); a second square block (451) is arranged on the support column (45); a second straight hole (452) is formed in the second square block (451); the first lock rod (35) passes through the first straight hole (471); the second lock rod (36) passes through the second straight hole (452);
a stop groove (37) is formed in the part of the first lock rod (35) inserted into the first straight hole (471); a notch (472) is formed in the first square block (47); a plurality of first wedge blocks (474) are slidably connected to the notch (472); an elastic sheet (473) is fixed between the first wedge-shaped block (474) and the notch (472); the first wedge block (474) is insertable into a stop slot (37);
the top of the short column (46) is connected with a ring block (48) in a sliding manner; a first spring (481) is fixed at the bottom of the ring block (48); the top of the ring block (48) is sleeved at the bottom of another short column (46) adjacent to the ring block; a wafer (475) is connected in the notch (472) in a vertical sliding manner; the bottom of the wafer (475) is provided with a second wedge block (476); a square groove (477) is formed in the first wedge-shaped block (474); the second wedge block (476) can be inserted into a square groove (477); a plurality of round rods (478) are arranged at the top of the round plate (475); the tops of the round rods (478) penetrate out of the notches (472) and are connected through magnetic sheets (479); the magnetic sheet (479) can be contacted with the annular block (48);
a chute (49) is arranged at the upper part of the short column (46); two symmetrically arranged third wedge blocks (491) are connected in a sliding way in the sliding groove (49); a second spring (492) is fixed between the two third wedge blocks (491); a clamping groove (482) is formed in the inner side of the ring block (48); a straight groove (483) is arranged at the bottom of one end of the clamping groove (482); the third wedge-shaped block (491) can be embedded into the clamping groove (482); the bottom of the first spring (481) is fixed on the spacer ring (484); the top surface of the spacing ring (484) is provided with a plurality of inserting rods (485); the periphery of the ring block (48) is provided with slots (486) which are in one-to-one correspondence with the inserting rods (485); the top of the inserting rod (485) is embedded into the slot (486) and can slide along the slot (486); a T-shaped ring (487) is arranged at the bottom of the spacing ring (484); a T-shaped groove (470) is formed in the top of the first square block (47); the T-shaped ring (487) is embedded in a T-shaped groove (470);
through the arrangement of the ring blocks, all the short columns are longitudinally connected through the ring blocks to form an integral fixed rod so as to limit the transverse and longitudinal movement of the short columns; when the thyristor is damaged, the ring block is pressed to separate the thyristor from the other short column above the thyristor, then the ring block pushes the magnetic sheet to synchronously move, so that the second wedge block is inserted into the square groove, and simultaneously pushes the first wedge block to slide to separate the first wedge block from the stop groove, the first lock rod is separated from the first straight hole, the damaged thyristor can be detached, and the thyristor and the heat conducting block arranged between the other short columns and the support column are not affected, so that the new or repaired thyristor can be conveniently installed subsequently; when the thyristor is installed, the second lock rod is inserted between the second straight hole and the connecting sheet, then the short column is moved to one side of the heat conducting block, and the bottom of the short column is embedded into the annular block of the other short column below the short column; the first spring is compressed when the ring block is pressed, so that the top of the short column moves to the position right below the other end of the top of the short column, the first spring drives the ring block to reset and move upwards after the hand is loosened, three adjacent short columns are connected into a whole, then the first lock rod is inserted between the connecting sheet and the first straight hole, the elastic sheet drives the first wedge block to be inserted into the stop groove, and the installation of the thyristor and the heat conducting block is completed;
by arranging the third wedge-shaped block, when the ring block is pressed, the second spring drives the third wedge-shaped block to be embedded into the clamping groove, and the reset of the first spring is limited, so that the ring block keeps the pressing effect on the magnetic sheet, the first lock rod is conveniently pulled out from the first straight hole, and the short column is also conveniently connected with two short columns adjacent to the first lock rod; the third wedge-shaped block is opposite to the straight groove through rotating the ring block, so that the third wedge-shaped block slides along the straight groove to separate from the ring block, and the ring block is convenient to move upwards and reset; the spacer ring is used for isolating the first spring from the first square block, the T-shaped ring and the T-shaped groove are matched to enable the spacer ring to be in rotary connection with the first square block, the spacer ring synchronously rotates when the inserting rod and the inserting groove are matched to enable the ring block to rotate, and damage to the first spring when the ring block rotates is avoided.
2. The high-voltage motor soft start device according to claim 1, wherein: a front door (21) is arranged on the front surface of the soft start cabinet (2); side doors (22) are respectively arranged on two sides of the soft start cabinet (2); the tops of the front door (21) and the side door (22) are hinged on the soft start cabinet (2); a plurality of cooling fans (23) are arranged on the side door (22); a filter screen (24) is arranged outside the cooling fan (23); two support blocks (25) are connected to the two sides in the soft start cabinet (2) in a sliding manner; the support block (25) is hinged with a first connecting rod (251) and a second connecting rod (252); the top of the first connecting rod (251) is hinged on the front door (21); the top of the second connecting rod (252) is fixed on the side door (22); a supporting rod (253) is fixed between the two supporting blocks (25); a straight rod (26) is arranged at the upper part of the soft start cabinet (2); a hook (27) is rotatably connected to the straight rod (26); the supporting rod (253) can fall on the hook (27).
3. A high voltage motor soft start device as claimed in claim 2, wherein: both sides of the soft start cabinet (2) are respectively provided with a negative pressure cavity (28); a piston sheet (281) is connected in a sliding way in the negative pressure cavity (28); a tension spring (282) is fixed between the bottom of the piston piece (281) and the negative pressure cavity (28); a pull rope (283) is fixed at the top of the piston sheet (281); the end part of the stay cord (283) is fixed on the supporting block (25); a communication port (284) is arranged at the side of the negative pressure cavity (28); the length of the communication port (284) is greater than the thickness of the piston sheet (281); the communication port (284) communicates with the outside.
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| CN202111358765.9A CN114144010B (en) | 2021-11-17 | 2021-11-17 | High-voltage motor soft starting device |
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