CN112018998A

CN112018998A - Explosion-proof frequency converter device

Info

Publication number: CN112018998A
Application number: CN202011136573.9A
Authority: CN
Inventors: 张春晖; 余晓林
Original assignee: Jiangsu Jiaxuan Intelligent Industrial Technology Co ltd
Current assignee: Jiangsu Jiaxuan Intelligent Industrial Technology Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2020-12-01

Abstract

The invention discloses an explosion-proof frequency converter device, which relates to the technical field of frequency converters and comprises a box body (10), a high-voltage device group, a low-voltage device group and a heat dissipation structure, wherein the high-voltage device group is arranged inside the box body (10), and the low-voltage device group is arranged on the inner side of a box door (1) of the box body (10); the heat dissipation structure is positioned outside the box body (10); the box body (10) is connected with the box door (1) through a quick door opening structure. According to the invention, through layout optimization, high-voltage and low-voltage devices are separately installed, the high-voltage device group is arranged in the box body (10), the low-voltage device group is arranged on the box door (1), and the heat dissipation device is arranged outside the box body (10), so that the safety of the whole equipment is improved, meanwhile, high-efficiency heat dissipation is realized, the full utilization of the installation space is realized, the whole volume of the frequency converter is reduced, and meanwhile, the requirement of explosion suppression is met.

Description

Explosion-proof frequency converter device

Technical Field

The invention relates to the technical field of frequency converters, in particular to an explosion-proof frequency converter device.

Background

The invention discloses a method for controlling a motor in a coal mine, which mainly comprises the steps of directly controlling the motor by adopting a combination switch or software starting, selecting the type of the motor according to the maximum power multiplied by a certain safety factor when the motor is selected according to the characteristics of the load and the safety of the operation of equipment, so that the selected motor is in a low-load operation state in the actual working condition operation process, the power factor and the efficiency of a three-phase asynchronous motor are relatively low when the motor is operated under a low load, and large energy waste is caused in the use process, and the power factor and the efficiency of the motor under the working condition of a low load rate are improved by utilizing a frequency converter to drive the motor. The service life of the low-voltage device is shortened, and the low-voltage device is frequently required to be replaced or maintained; meanwhile, the interior of the frequency converter with small volume cannot meet the explosion-proof requirement, and the frequency converter is not suitable for the scenes of small mining area and narrow laneway of mines in the south.

Disclosure of Invention

The invention aims to solve the problems and provide an explosion-proof frequency converter device which has small volume, high heat dissipation efficiency, explosion resistance and long service life.

The technical scheme provided comprises the following steps: the explosion-proof frequency converter device of the invention comprises: the high-voltage device group is arranged in the box body, and the low-voltage device group is arranged on the inner side of a box door of the box body;

the heat dissipation structure is positioned outside the box body;

the box through open door structure soon with the chamber door is connected, puts the installation through high-low pressure device branch, reduces the mutual influence between the high-low pressure device, and the inside space of make full use of converter simultaneously reduces the inside volume of converter, guarantees that the converter is inside to reach explosion-proof standard.

In the invention, the inner side of the box door is provided with a concave part, the inner side of the box door is provided with the concave part, the concave part is provided with a plurality of rib plates and a mounting plate which are mutually crossed, the rib plates are respectively contacted with the concave part and the mounting plate, the mounting plate is arranged in parallel relative to the end surface of the bottom end of the concave part, and a plurality of cavities are formed among the end surface of the bottom end of the concave part, the rib plates and the mounting plate, so that the space of the inner side of the box door is enlarged, and more low-voltage.

In the invention, the heat dissipation structure comprises a heat dissipation substrate and a radiator, the heat dissipation substrate is arranged inside the box body, the radiator is arranged outside the box body, one side of the radiator is in contact with the heat dissipation substrate, and as the main heating element inside the frequency converter is the ICBT module, the radiator is arranged on the rear side outside the box body, so that the whole volume of the frequency converter is reduced and the heat dissipation efficiency of the frequency converter is improved.

According to the invention, the heat dissipation substrate is made of red copper, so that the heat conduction performance and the extension performance are good, the heat dissipation efficiency is improved, and the explosion-proof requirement inside the frequency converter is further met.

The heat dissipation fan cover is arranged outside the box body, and the radiator is located inside the heat dissipation fan cover to protect the radiator.

In the invention, the heat dissipation fan cover is made of a stainless steel plate, and the thickness of the stainless steel plate is 1-10 mm.

In the invention, the box body is provided with a flange structure, the flange structure comprises a box body rear flange, the box body is connected with the box body rear flange, and the box body rear flange is connected with the radiator.

In the invention, the flange structure further comprises a box body front flange, and the box body front flange is tightly contacted with the box door.

In the invention, the box body front flange is provided with a first groove and a second groove.

In the invention, the inner side of the box door is provided with a first lug and a second lug, the first lug corresponds to the second groove, and the second lug corresponds to the first groove.

In the invention, a junction box is arranged above the box body, and a plurality of wiring cavities with horn mouths are reserved on the junction box and used for wiring.

In the invention, the high-voltage device group comprises high-voltage electrical elements such as an isolating switch, a main fuse, a vacuum contactor, a reactor, a rectifier diode, a capacitor, an IGBT module and a transformer, and the low-voltage device group comprises low-voltage electrical elements such as a PLC unit, a relay, a switching power supply, a safety grid module, a wiring terminal and a contactor.

In the invention, the isolation switch is arranged on the right side in the box body, the main fuse is arranged below the isolation switch, the vacuum contactor is arranged below the main fuse, the reactor is arranged below the vacuum contactor, the rectifier diode is arranged on the left side of the vacuum contactor, the capacitor is arranged above the rectifier diode, the IGBT module is arranged behind the rectifier diode, the transformer is arranged on the left side of the reactor, reasonable layout is carried out on electric elements in the box body, and the spaces above, below, on the left side, on the right side, in front of and behind each high-voltage device are fully utilized, so that the whole volume of the frequency converter is further reduced.

In the invention, the PLC unit is arranged in the middle of the inner side of the box door, the relay is arranged on the right side of the PLC unit, the switching power supply is arranged above the PLC unit, the safety grid module is arranged on the right side of the switching power supply, the wiring terminal is arranged on the left side of the PLC unit, the contactor is arranged below the PLC unit, the relay, the wiring terminal and the contactor are fixed on the mounting plate, the switching power supply is connected with the rib plate to reasonably distribute low-voltage devices, and the larger structural PLC unit, the relay, the wiring terminal and the contactor are arranged on the inner side of the box door through the mounting plate, so that the structural PLC unit, the relay, the wiring terminal and the contactor are.

The invention has the beneficial effects that:

1. through layout optimization, the high-voltage device is arranged in the box body, the low-voltage device is arranged on the box door, and all electrical elements in the frequency converter are arranged, so that the safety of the whole equipment is improved, the service life of the equipment is prolonged, meanwhile, the space in the frequency converter is fully utilized, and the whole volume of the frequency converter is reduced;

2. the radiator and the fan are placed outside the box body, so that efficient heat dissipation can be achieved, the size of the frequency converter is reduced, and the mounting space is fully utilized.

Drawings

FIG. 1 is a schematic view of the interior of the explosion-proof frequency converter device case of the present invention

FIG. 2 is a schematic view of the interior of the door of the explosion-proof frequency converter device of the present invention

FIG. 3 is a sectional view of the interior of the door of the explosion-proof frequency converter device of the present invention

FIG. 4 is an overall view of the exterior of the explosion-proof frequency converter apparatus according to the present invention

FIG. 5 is a schematic view of the outer left side of the explosion-proof frequency converter device of the present invention

FIG. 6 is a right side schematic view of the interior of the case of the explosion-proof frequency converter device of the present invention

Shown in the figure are: the safety box comprises a box door 1, a first bump 1a, a second bump 1b, a bell mouth 2, a junction box 3, a cover plate 4, a display screen window 5, an explosion-proof button 6, a lifting structure 7, a radiator 8, a heat-dissipation fan cover 9, a box 10, a switching power supply 11, an intrinsic safety type power supply 12, a first safety barrier 13, a second safety barrier 14, a third safety barrier 15, a right door frame 16, a relay 17, a PLC unit 18, a contactor 19, a lower door frame 20, a wiring terminal 21, an installation plate 22, a left door frame 23, an upper door frame 24, an isolating switch 25, a main fuse 26, a box front flange 27, a vacuum contactor 28, a rack 29, a fan 30, a fan transformer 31, a control transformer 32, a fan bracket 33, a cooling fan 34, a rectifier diode 35, a capacitor 36, a cooling substrate 37, an IGBT module 38, a box rear flange 39, a first groove 40, a second groove 41, a first cavity 42, a, A first horizontal rib 44, a second cavity 45, a third cavity 46, a second vertical rib 47, a fourth cavity 48, a fifth cavity 49, a sixth cavity 50, a second horizontal rib 51, a seventh cavity 52, an eighth cavity 53 and a ninth cavity 54.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present description is specifically described below with reference to the accompanying drawings:

as shown in fig. 1 to 6, in the present embodiment, an explosion-proof frequency converter apparatus includes: the high-voltage device group is arranged inside the box body 10, the low-voltage device group is arranged inside a box door 1 of the box body 10, the mutual influence between the high-voltage device group and the low-voltage device group during working is reduced in a mode of separating the high-voltage device group and the low-voltage device group from each other, the service life of each electrical element is prolonged, meanwhile, the space between the box door 1 and the box body 10 is fully utilized, and the whole volume of the frequency converter is reduced.

In this embodiment, the high-voltage device group includes an isolation switch 25, a main fuse 26, a vacuum contactor 28, a reactor 30, a filter, a rectifier diode 35, a capacitor 36, an igbt (insulated Gate Bipolar transistor) module 38, and a transformer, and the low-voltage device group includes a plc (programmable Logic controller) unit 18, a relay 17, a switching power supply 11, a safety grid module, a connection terminal 21, and a contactor 19, and the layout of each electrical component inside the frequency converter is performed, so that the space inside the box 10 and the space inside the box door 1 are fully utilized, and the overall volume of the frequency converter is further reduced.

In the present embodiment, the disconnection switch 25 is installed on the right side surface inside the case 10; the main fuse 26 is connected with the isolating switch 25 through a copper bar and is positioned below the isolating switch 25; the vacuum contactor 28 is connected with the main fuse 26 through a copper bar and is positioned below the main fuse 26; the reactor 30 is located below the vacuum contactor 28; a frame 29 is arranged behind the vacuum contactor 28, and a filter is arranged in the frame 29; the rectifier diode 35 is arranged on the left side of the vacuum contactor 28; the capacitor 36 is arranged above the rectifier diode 35; the IGBT module 38 is arranged behind the rectifier diode 35; the transformer is arranged on the left side of the reactor 30.

In this embodiment, a fan bracket 33 is installed at the bottom end inside the box 10, the fan bracket 33 is disposed at the left side of the transformer, a heat dissipation fan 34 is installed on the fan bracket 33, and the heat dissipation fan 34 blows air in the direction of the IGBT module 38, so as to reduce the heat inside the inverter.

In this embodiment, the controller includes a fan transformer 31 and a control transformer 32, the fan transformer 31 is connected to the cooling fan 34 to supply direct current to the cooling fan 34, so as to ensure safe operation of the cooling fan 34; the control transformer 32 is connected to the PLC unit 18 to supply dc power to the PLC unit 18, thereby ensuring safe operation of the PLC unit 18.

In this embodiment, the inner side of the box door 1 is provided with a concave part, the concave part is provided with a plurality of mutually crossed rib plates and a mounting plate 22, the rib plates are respectively contacted with the end surface at the bottom end of the concave part and the mounting plate 22, the mounting plate 22 is arranged in parallel relative to the end surface at the bottom end of the concave part, a plurality of cavities are formed among the end surface at the bottom end of the concave part, the plurality of rib plates and the mounting plate 22, the inner space between the box door 1 and the box opening is enlarged, and low-voltage.

In the present embodiment, door 1 further has upper frame 24, lower frame 20, left frame 23, and right frame 16.

In this embodiment, the number of the rib plates is 4, the rib plates include a first horizontal rib plate 44 and a second horizontal rib plate 51 which are horizontally arranged relative to the ground, and a first vertical rib plate 43 and a second vertical rib plate 47 which are vertically arranged relative to the ground, the first horizontal rib plate 44 and the second horizontal rib plate 51 are respectively perpendicular to the first vertical rib plate 43, the first horizontal rib plate 44 and the second horizontal rib plate 51 are respectively perpendicular to the second vertical rib plate 47, the first horizontal rib plate 44, the second horizontal rib plate 51, the first vertical rib plate 43 and the second vertical rib plate 47 are in a grid shape on the box door 1, and are numbered from the upper left corner and to the right in sequence according to the serpentine direction, which are respectively: a first cavity 42, a second cavity 45, a third cavity 46, a fourth cavity 48, a fifth cavity 49, a sixth cavity 50, a seventh cavity 52, an eighth cavity 53, a ninth cavity 54.

In the present embodiment, the mounting plate 22 covers two rows of cavities below the door 1, i.e. the mounting plate 22 covers the fourth cavity 48, the fifth cavity 49, the sixth cavity 50, the seventh cavity 52, the eighth cavity 53, the ninth cavity 54.

In the embodiment, the PLC unit 18 is fixedly mounted on the mounting plate 22 and is located at the middle position of the inner side of the door 1, that is, the PLC unit 18 is located at the fifth cavity 49, and a part of the PLC unit 18 is located in the fifth cavity 49 and another part of the PLC unit 18 is exposed from the surface of the mounting plate 22; the relay 17 is fixedly arranged on the mounting plate 22 and is positioned at the right side of the PLC unit 18, namely the relay 17 is positioned at the fourth cavity 48, one part of the relay 17 is positioned in the fourth cavity 48, and the other part of the relay 17 is exposed out of the surface of the mounting plate 22; the switching power supply 11 is connected with the right side surface of the second vertical rib plate 47, is positioned above the PLC unit 18 and is positioned in the third cavity 46; the safety grid module is connected with the switching power supply 11 through the intrinsically safe power supply 12, is positioned on the right side of the switching power supply 11 and is positioned in the third cavity 46; the wiring terminal 21 is fixedly installed on the installation plate 22 and arranged on the left side of the PLC unit 18, and is located in the sixth cavity 50 and the seventh cavity 52, one part of the upper end of the wiring terminal 21 is located in the sixth cavity 50, the other part of the upper end of the wiring terminal 21 is exposed from the surface of the installation plate 22, one part of the lower end of the wiring terminal 21 is located in the seventh cavity 52, and the other part of the lower end of the wiring terminal 21 is exposed from the surface of the installation plate 22; the contactor 19 is fixedly installed on the installation plate 22 and arranged below the PLC unit 18, and a portion of the contactor 19 is located in the eighth cavity 53, and another portion is exposed from the surface of the installation plate 22, so that the space inside the door 1 is fully utilized.

In this embodiment, the safety barrier module comprises a first safety barrier 13, a second safety barrier 14, a third safety barrier 15, the third safety barrier 15 being arranged on the right side of the intrinsically safe power supply 12, the second safety barrier 14 being arranged on the right side of the third safety barrier 15, the first safety barrier 13 being arranged on the right side of the second safety barrier 14.

In this embodiment, the heat dissipation structure includes a heat dissipation substrate 37 and a heat sink 8, the heat dissipation substrate 37 is installed inside the rear side of the box 10, the heat sink 8 is installed outside the rear side of the box 10, the heat sink 8 penetrates through the rear side of the box 10 and contacts with the heat dissipation substrate 37, the heat sink 8 is disposed outside the explosion-proof frequency converter box 10, and the heat dissipation effect inside the explosion-proof frequency converter is improved while the size of the explosion-proof frequency converter is reduced.

In the present embodiment, the heat dissipating substrate 37 uses red copper as its heat conductive material, so as to improve its heat conductivity, further improve heat dissipating performance, and reduce the operating temperature of the heating element.

In this embodiment, the heat sink 8 is a heat pipe heat sink, a cooling pipe in the heat pipe heat sink is disposed obliquely upward relative to the rear side of the case 10, one end of the heat pipe heat sink close to the ground contacts the heat dissipation substrate 37, the coolant collects one end of the heat pipe heat sink close to the ground under the action of gravity, when the frequency converter works, heat is generated inside the frequency converter, the heat dissipation substrate 37 conducts heat, the coolant in the cooling pipe contacting the heat dissipation substrate 37 is heated, so that the coolant is evaporated into a gaseous state and moves along the cooling pipe in a direction away from the rear side of the case 10, when the frequency converter moves to the other end of the cooling pipe, the coolant is condensed and solidified into a liquid state and flows along the cooling pipe in a direction close to the rear side of the case 10, so as to form a circulation path and improve.

In this embodiment, the fan is further installed beside the heat pipe radiator, and the fan blows air to the cooling pipeline in the heat pipe radiator, so that the speed of solidifying gaseous cooling liquid in the cooling pipeline into liquid is increased, and the cooling efficiency is improved.

In this embodiment, the heat pipe radiator and the fan are externally provided with the heat dissipation fan housing 9, and the heat dissipation fan housing 9 is installed outside the rear side surface of the box body 10 through bolts, so that the situation that coal blocks or dust falls from the top of a roadway in the process of underground operation breaks the radiator 8 and the fan or blocks an air outlet of the fan is prevented.

In this embodiment, the heat-dissipating fan housing 9 is made of a stainless steel plate having a thickness of 4 mm.

In the present embodiment, the case 10 has a case rear flange 39 and a case front flange 27. The box body rear flange 39 is positioned on the rear side surface of the box body 10 and is connected with the radiator 8, so that the radiator 8 is fixed, and meanwhile, the heat dissipation of the electric elements can be carried out, and the heat dissipation effect of the frequency converter is further improved.

In this embodiment, the case front flange 27 is installed at the front end of the case 10, the lower end of the case front flange 27 has a first groove 40, the upper end of the case front flange 27 has a second groove 41, and the openings of the first groove 40 and the second groove 41 face upward.

The upper end of the inner side of the box door 1 is provided with a first convex block 1a, and the lower end of the inner side of the box door 1 is provided with a second convex block 1 b. When the box door 1 is closed, the first groove 40 and the second groove 41 respectively correspond to the second bump 1b and the first bump 1a one by one and are mutually matched and installed together, so that the box body front flange 27 is in close contact with each door frame of the box door 1, and the frequency converter is ensured to reach the explosion-proof standard.

In this embodiment, a quick door opening structure is adopted between the box body 10 and the door 1, the right side of the front end of the box body 10 is connected with the right end of the door 1 through a lifting structure 7, the right end of the door 1 is further provided with a handle, when the door needs to be closed, an operator holds the handle to apply an upward force to the handle to drive the door 1 to move upwards, then an external force for moving the door 1 towards the box body 10 is applied to the outside of the door 1, the left end of the door 1 is pushed towards the box body 10, the handle is released, the door 1 moves downwards under the action of self gravity, a first bump 1a at the upper end of the door 1 is matched with a second groove 41 at the upper end of the box body 10, a second bump 1b at the lower end of the door 1 is matched with a first groove 40 at the lower end of the box body 10, quick closing is realized, a quick door opening mechanism is formed between the box body 10 and the door 1, and meanwhile, the interior of the box body 10 is ensured to meet the explosion-proof requirement.

In this embodiment, a junction box 3 is installed above the box 10, and a plurality of wiring cavities with horn mouths, preferably six horn mouths 2, are distributed on the junction box 3, so as to ensure that external signals under different working conditions have enough lead-in devices to be connected into the inside of the frequency converter.

In this embodiment, the cover plate 4 is installed above the junction box 3, and when coal or dust falls off from the top of the roadway in the process of underground operation, the junction box 3 is protected.

In this embodiment, the outer side of the box door 1 is provided with a display screen window 5 and a plurality of flameproof buttons 6, preferably 10 flameproof buttons 6, so that an operator can conveniently perform local control on the frequency converter by operating the flameproof buttons 6.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that although the present specification describes the embodiments, the above-mentioned embodiments are exemplary and not intended to limit the scope of the present invention, and any changes, modifications, substitutions and alterations made by those skilled in the art without departing from the principle and spirit of the present invention shall be included in the scope of the present invention.

Claims

1. An explosion-proof frequency converter device, comprising: the refrigerator comprises a refrigerator body (10), a high-voltage device group, a low-voltage device group and a heat dissipation structure, wherein the high-voltage device group is installed inside the refrigerator body (10), and the low-voltage device group is installed on the inner side of a refrigerator door (1) of the refrigerator body (10);

the heat dissipation structure is positioned outside the box body (10);

the box body (10) is connected with the box door (1) through a quick door opening structure.

2. An explosion-proof frequency converter device according to claim 1, characterized in that the inner side of the box door (1) is provided with a concave part, the concave part is provided with a plurality of mutually crossed rib plates and a mounting plate (22), the rib plates are respectively contacted with the concave part and the mounting plate (22), the mounting plate (22) is arranged in parallel relative to the end surface of the bottom end of the concave part, and a plurality of cavities are formed among the end surface of the bottom end of the concave part, the rib plates and the mounting plate (22).

3. An explosion-proof frequency converter device according to claim 1, characterized in that the heat dissipation structure comprises a heat dissipation substrate (37) and a heat sink (8), the heat dissipation substrate (37) is arranged inside the case (10), the heat sink (8) is arranged outside the case (10), and one side of the heat sink (8) is in contact with the heat dissipation substrate (37).

4. An explosion-proof frequency converter device according to claim 3, characterized by further comprising a heat dissipation fan housing (9), wherein the heat dissipation fan housing (9) is installed outside the box body (10), and the heat sink (8) is located inside the heat dissipation fan housing (9).

5. An explosion-proof frequency converter device according to claim 1, characterized in that the tank (10) is arranged with a flange structure comprising a tank rear flange (39), the tank (10) being connected with the tank rear flange (39), the tank rear flange (39) being connected with the heat dissipating structure.

6. An explosion-proof frequency converter device according to claim 5, characterized in that the flange structure further comprises a case front flange (27), and the case front flange (27) is in close contact with the case door.

7. An explosion-proof frequency converter arrangement according to claim 6, characterized in that the case front flange (27) has a first recess (40) and a second recess (41).

8. An explosion-proof frequency converter device according to claim 7, characterized in that the inner side of the box door (1) has a first projection (1 a) and a second projection (1 b), the first projection (1 a) corresponding to the second recess (41), and the second projection (1 b) corresponding to the first recess (40).

9. An explosion-proof frequency converter device according to claim 1, characterized in that a junction box (3) is installed above the box body (10), and a plurality of wiring cavities with horn mouths are distributed on the junction box (3).