CN213072432U - Overvoltage protection device for frequency converter of coal mill separator - Google Patents
Overvoltage protection device for frequency converter of coal mill separator Download PDFInfo
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- CN213072432U CN213072432U CN202022384183.5U CN202022384183U CN213072432U CN 213072432 U CN213072432 U CN 213072432U CN 202022384183 U CN202022384183 U CN 202022384183U CN 213072432 U CN213072432 U CN 213072432U
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- device shell
- fan
- base
- coal pulverizer
- frequency converter
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Abstract
The utility model discloses a coal pulverizer separator converter prevent overvoltage protector, including device base, water absorption hole, fan and connector, the vent has been seted up to the upside of device shell, install the filter screen in the vent, the inside upper surface of device shell is provided with dampproofing case, the water absorption hole has been seted up on the surface of dampproofing case, the top at circuit element is installed to dampproofing case, circuit element's below is fixed with the fan, and the fan is fixed on the inside bottom surface of device shell, the connector has been seted up on the lateral surface of device shell. This coal pulverizer separator converter prevent overvoltage protector is provided with the resistance box, and the direct current bus output terminal of converter connects two 6 square wires to the binding post of resistance box respectively, and it can to carry out the knee to partial parameter again, has prevented that the separator converter from because of the mistake tripping operation that the interior wind speed of barrel changes and arouses, has ensured the safe operation of coal pulverizer, is very helpful to the safe and stable operation of generating set.
Description
Technical Field
The utility model relates to a coal pulverizer separator converter operation maintenance technical field specifically is a coal pulverizer separator converter prevent overvoltage protector.
Background
The frequency converter of 12 coal mill separators in an Anyuan power plant is of a Roxwell 753 series, the power of a motor is 45 kilowatts, the frequency converter frequently has a direct-current bus overvoltage tripping phenomenon in operation, can operate for a period of time after reset, sometimes the same frequency converter has the same tripping faults for several times within one month, still fails to solve the fault of abnormal tripping in operation after modifying other parameters such as acceleration and deceleration time, the 12 frequency converters all have the faults, the safe and stable operation of the coal mill is seriously influenced, a frequency converter cabinet manufacturer is consulted to fail to return a better solution, the frequency converter cabinet frequency converter frequency, the operation of a motor-generator is caused, the load inertia is too large, the frequency converter cannot maintain the given rotating speed, the voltage of a direct current bus in the frequency converter is increased, and the wind speed waveform after each trip is analyzed by thermal engineering personnel without obvious fluctuation.
The frequency converter often causes the fault tripping because of direct current bus overvoltage, influences the normal work of coal pulverizer, and the fixed bolt fastening that still adopts of converter shell, and operation process is troublesome, consumes the manpower, so we have proposed the anti-overvoltage protection device of coal pulverizer separator frequency converter to in solving the problem that proposes in the aforesaid.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coal pulverizer separator converter prevent overvoltage protector to solve the current market up-converter that above-mentioned background art provided and often cause the fault trip because of direct current generating line excessive pressure, influence the normal work of coal pulverizer, and the fixed bolt fastening that still adopts of converter shell, operation process is troublesome, consumes the problem of manpower.
In order to achieve the above object, the utility model provides a following technical scheme: an overvoltage protection device for a coal mill separator frequency converter comprises a device base, a water suction hole, a fan and a connecting port, wherein a fixed seat is arranged on the side face of the device base, a fastening bolt is installed on the fixed seat, a limiting block is fixed on the surface of the device base, a supporting spring is connected to the back face of the limiting block, a rotating shaft is arranged at the connecting position of the limiting block and the device base, a device shell is connected to the outer side of the device base, a limiting groove is formed in the surface of the device shell, a circuit element is installed inside the device shell and fixed on the surface of the device base, a vent hole is formed in the surface of the moisture-proof box, a filter screen is installed in the vent hole, a moisture-proof box is arranged on the upper surface inside the device shell, a water suction hole is formed in the surface of the moisture-, and a fan is fixed below the circuit element, the fan is fixed on the bottom surface inside the device shell, and a connecting port is formed in the outer side surface of the device shell.
Preferably, the overall dimension of the device base is larger than that of the device shell, the device base is fixedly connected with the fixed seat, and the fixed seat is in threaded connection through the fastening bolt.
Preferably, the shape of stopper is the L type, the stopper is last through supporting spring at the device base, and is fixed connection between stopper and the supporting spring, the rotation angle of stopper can not exceed 90, the stopper is provided with 4, and stopper evenly distributed is on the surface of device shell.
Preferably, the shape and size of the limiting groove are the same as those of the limiting block, 4 limiting grooves are arranged, and the positions of the limiting grooves correspond to the installation positions of the limiting block.
Preferably, the ventilation openings are arranged on two sides of the upper surface of the device shell, the ventilation openings are detachably connected with the filter screens, and the distance between the filter screens is smaller than the size of the fan.
Preferably, the inside bottom surface of fan and device shell is fixed connection, dampproofing case is located the fan directly over, and dampproofing case installs between the vent, the hole that absorbs water evenly sets up on the surface of dampproofing case.
Compared with the prior art, the beneficial effects of the utility model are that: this coal pulverizer separator converter prevent overvoltage protector:
(1) the direct-current bus output terminal of the frequency converter is connected with two 6-square wires to a connecting terminal of the resistance box respectively, and then knee joint is carried out on part of parameters, so that false tripping of the frequency converter of the separator caused by wind speed change in the cylinder is prevented, safe operation of the coal mill is guaranteed, and safe and stable operation of a generator set is facilitated;
(2) the device is provided with the limiting block and the limiting groove, so that the connection between the device shell and the device base is more convenient, the temperature of the device during operation is reduced by the fan additionally arranged on the bottom surface of the device shell, and the moisture in the device can be absorbed by the additionally arranged moisture-proof box, so that the inside of the device is always kept dry, and the circuit in the device is prevented from being damaged due to high temperature or humidity.
Drawings
FIG. 1 is a schematic view of the main sectional structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side view of the base of the device of the present invention;
fig. 4 is a schematic side view of the device housing of the present invention.
In the figure: 1. a device base; 2. a fixed seat; 3. fastening a bolt; 4. a limiting block; 5. a support spring; 6. a rotating shaft; 7. a device housing; 8. a limiting groove; 9. a circuit element; 10. a vent; 11. a filter screen; 12. a moisture-proof box; 13. a water suction hole; 14. a fan; 15. and (7) connecting ports.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: an overvoltage-preventing protection device of a coal mill separator frequency converter comprises a device base 1, a fixed seat 2, a fastening bolt 3, a limiting block 4, a supporting spring 5, a rotating shaft 6, a device shell 7, a limiting groove 8, a circuit element 9, a vent 10, a filter screen 11, a moisture-proof box 12, a water suction hole 13, a fan 14 and a connecting port 15, wherein the fixed seat 2 is arranged on the side surface of the device base 1, the fastening bolt 3 is installed on the fixed seat 2, the limiting block 4 is fixed on the surface of the device base 1, the supporting spring 5 is connected on the back surface of the limiting block 4, the rotating shaft 6 is arranged at the connecting part of the limiting block 4 and the device base 1, the device shell 7 is connected to the outer side of the device base 1, the limiting groove 8 is formed in the surface of the device shell 7, the circuit element 9 is installed inside the device shell 7, the circuit element 9 is, a filter screen 11 is installed in the ventilation opening 10, a moisture-proof box 12 is arranged on the upper surface inside the device shell 7, a water suction hole 13 is formed in the surface of the moisture-proof box 12, the moisture-proof box 12 is installed above the circuit element 9, a fan 14 is fixed below the circuit element 9, the fan 14 is fixed on the bottom surface inside the device shell 7, and a connecting port 15 is formed in the outer side surface of the device shell 7.
The overall dimension of device base 1 is greater than the overall dimension of device shell 7, is fixed connection between device base 1 and fixing base 2, and threaded connection is accomplished through fastening bolt 3 to fixing base 2, makes device base 1 fixed by fixing base 2 and fastening bolt 3.
The shape of stopper 4 is the L type, and stopper 4 passes through supporting spring 5 and constitutes the active structure on device base 1, and is fixed connection between stopper 4 and the supporting spring 5, and stopper 4's rotation angle can not exceed 90, and stopper 4 is provided with 4, and stopper 4 evenly distributed is on the surface of device shell 7, makes stopper 4 can fixing device shell 7.
The shape and size of the limiting groove 8 are the same as those of the limiting block 4, 4 limiting grooves 8 are arranged, and the positions of the limiting grooves 8 correspond to the installation positions of the limiting blocks 4, so that the connection between the device shell 7 and the device base 1 is simpler.
The ventilation openings 10 are arranged at two sides of the upper surface of the device shell 7, the ventilation openings 10 are detachably connected with the filter screens 11, and the distance between the filter screens 11 is smaller than the size of the fan 14.
The working principle is as follows: when the overvoltage protection device of the coal mill separator frequency converter is used, firstly, parts required by the device are assembled, the device base 1 is fixed with the fastening bolt 3 through the fixing seat 2 on the side face of the device base 1, then the circuit element 9 inside the device is fixed on the surface of the device base 1, two 6 square wires are respectively connected to the connecting terminals of the resistance box at the direct current bus output terminal of the frequency converter, and then partial parameters are changed.
Then aligning a limiting groove 8 formed on the surface of the device shell 7 with a limiting block 4 formed on the surface of the device base 1, pushing the device shell 7 to enable the limiting block 4 to enter the limiting groove 8, knowing that the tail end of the limiting block 4 appears on the upper surface and the lower surface of the device shell 7, indicating that the connection between the device shell 7 and the device base 1 is completed, when the device shell 7 needs to be disassembled, the limiting block 4 only needs to be pressed inwards to enable the limiting block 4 to rotate under stress, then the device shell 7 is taken down, the fan 14 and the moisture-proof box 12 in the device shell 7 enable the air in the device to be dried, and can reduce the temperature of the device during operation, the air inside the device is emitted from the ventilation opening 10, the above is the operation of the device, and the details which are not described in detail in this specification, such as the support spring 5, the filter screen 11, etc., are well known in the art to those skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a coal pulverizer separator converter prevent overvoltage crowbar, includes device base (1), suction opening (13), fan (14) and connector (15), its characterized in that: the device is characterized in that a fixing seat (2) is arranged on the side face of a base (1), a fastening bolt (3) is installed on the fixing seat (2), a limiting block (4) is fixed on the surface of the base (1), a supporting spring (5) is connected to the back face of the limiting block (4), a rotating shaft (6) is arranged at the joint of the limiting block (4) and the base (1), a device shell (7) is connected to the outer side of the base (1), a limiting groove (8) is formed in the surface of the device shell (7), a circuit element (9) is installed inside the device shell (7), the circuit element (9) is fixed on the surface of the base (1), a vent (10) is formed in the upper side of the device shell (7), a filter screen (11) is installed in the vent (10), and a moisture-proof box (12) is arranged on the upper surface inside the device shell (, the surface of dampproofing case (12) has been seted up and has been inhaled water hole (13), install the top at circuit element (9) dampproofing case (12), the below of circuit element (9) is fixed with fan (14), and fan (14) are fixed on the inside bottom surface of device shell (7), connector (15) have been seted up on the lateral surface of device shell (7).
2. The overvoltage protection device of the coal pulverizer separator frequency converter according to claim 1, wherein: the external dimension of the device base (1) is larger than that of the device shell (7), the device base (1) is fixedly connected with the fixing seat (2), and the fixing seat (2) is in threaded connection through the fastening bolt (3).
3. The overvoltage protection device of the coal pulverizer separator frequency converter according to claim 1, wherein: the shape of stopper (4) is the L type, stopper (4) are installed base (1) last through supporting spring (5), and be fixed connection between stopper (4) and supporting spring (5), the rotation angle of stopper (4) can not exceed 90, stopper (4) are provided with 4, and stopper (4) evenly distributed is on the surface of device shell (7).
4. The overvoltage protection device of the coal pulverizer separator frequency converter according to claim 1, wherein: the shape and size of the limiting groove (8) are the same as those of the limiting block (4), 4 limiting grooves (8) are arranged, and the positions of the limiting grooves (8) correspond to the installation positions of the limiting blocks (4).
5. The overvoltage protection device of the coal pulverizer separator frequency converter according to claim 1, wherein: the ventilation opening (10) is arranged at the positions of two sides of the upper surface of the device shell (7), the ventilation opening (10) is detachably connected with the filter screen (11), and the distance between the filter screen (11) is smaller than the size of the fan (14).
6. The overvoltage protection device of the coal pulverizer separator frequency converter according to claim 1, wherein: fan (14) and the inside bottom surface of device shell (7) are fixed connection, dampproofing case (12) are located fan (14) directly over, and dampproofing case (12) are installed between vent (10), the surface at dampproofing case (12) is evenly seted up in water absorption hole (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022384183.5U CN213072432U (en) | 2020-10-23 | 2020-10-23 | Overvoltage protection device for frequency converter of coal mill separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022384183.5U CN213072432U (en) | 2020-10-23 | 2020-10-23 | Overvoltage protection device for frequency converter of coal mill separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213072432U true CN213072432U (en) | 2021-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022384183.5U Active CN213072432U (en) | 2020-10-23 | 2020-10-23 | Overvoltage protection device for frequency converter of coal mill separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213072432U (en) |
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2020
- 2020-10-23 CN CN202022384183.5U patent/CN213072432U/en active Active
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