CN213879445U

CN213879445U - Conversion structure for frequency converter and frequency conversion all-in-one machine

Info

Publication number: CN213879445U
Application number: CN202022104450.9U
Authority: CN
Inventors: 王大伟; 杨绪峰; 宋承林
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-08-03
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a conversion structure for a frequency converter, which is characterized by comprising a frequency conversion shell, wherein a first connecting piece and a plurality of connecting terminals are respectively arranged on two sides of the frequency conversion shell; and the reactance box is detachably fixed on any one of two sides of the frequency conversion shell through the first connecting piece and the plurality of wiring terminals. The utility model discloses a transform structure makes the dismantlement and the installation of reactance case more convenient and nimble to satisfy different operating mode requirements.

Description

Conversion structure for frequency converter and frequency conversion all-in-one machine

Technical Field

The utility model discloses relate to the frequency conversion field generally. More specifically, the utility model relates to a conversion architecture and frequency conversion all-in-one for converter.

Background

In application scenes such as mining and the like, the used frequency conversion all-in-one machine can be fixed at the head part of the equipment or the tail part of the equipment according to different requirements of the equipment. If the frequency conversion all-in-one machine with the reactance box fixed on one side is used, the position requirements of the frequency conversion all-in-one machine on the reactance box are different because the frequency conversion all-in-one machine is used in different positions of equipment. In general, if the frequency conversion all-in-one machine used at the head part of the equipment is used at the tail part of the equipment, the reactance box can interfere with the equipment, so that the frequency conversion all-in-one machines used at different positions of the equipment cannot be directly shared. However, designing and manufacturing the frequency conversion all-in-one machine for the head part or the tail part of the equipment separately can increase the overall cost of the equipment.

For the situation of considering the sharing of the traditional frequency conversion all-in-one machine, when the frequency conversion all-in-one machine is fixed at different positions of the equipment, the position of the reactance box needs to be adjusted. When the position of adjustment reactance case, because the circuit between traditional converter and the reactance case is at the inside lug connection of box, need take converter upper cover and reactance case apron all apart, just can carry out the inside rewiring after taking out stitches and the adjustment reactance case position to lead to whole operation loaded down with trivial details relatively. In addition, due to the limited narrow working space under the mine, the operator under the mine cannot perform such complicated operation, and needs to ascend to the mine (referred to as "lift well") to perform the operation. However, once the well is raised, the overall efficiency of the operation is inevitably affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems described in the above background art, in one aspect, the present invention provides a conversion structure for a frequency converter, comprising:

the frequency conversion device comprises a frequency conversion shell, a first connecting piece and a plurality of wiring terminals, wherein the two sides of the frequency conversion shell are respectively provided with the first connecting piece and the plurality of wiring terminals; and

and the reactance box is detachably fixed on any one of two sides of the frequency conversion shell through the first connecting piece and the plurality of wiring terminals.

In one embodiment, the reactance box comprises a second connecting piece which is fixed on one side of the outer surface of the reactance box facing the frequency conversion shell and is used for fixedly connecting the reactance box with the frequency conversion shell.

In another embodiment, the outer edge of the second connector is arranged with a plurality of first mounting holes for fixing the reactance box to the frequency conversion housing.

In one embodiment, the reactance box is internally arranged with a wiring cavity having an opening towards the frequency conversion housing.

In another embodiment, the terminal block passes through the opening into the wiring cavity to make a connection with the line of the reactance box.

In yet another embodiment, the outer edge of the inner surface of the wiring cavity is arranged with a plurality of second mounting holes for fixing the reactance box to the variable frequency housing.

In one embodiment, the reactance box further comprises a protective cover supporting an explosion-proof function, the protective cover covers the wiring cavity and is arranged on one side, far away from the frequency conversion shell, of the wiring cavity.

In another embodiment, the connecting terminal on one side of the frequency conversion shell has the same function as the connecting terminal on the other side of the frequency conversion shell, so that the reactance box can be connected with the frequency converter when being fixed on any side of the frequency conversion shell.

In one embodiment, the first connector is arranged with a plurality of openings for interfacing with the first mounting hole and/or the second mounting hole to secure the reactance box to either side of the inverter housing.

In another aspect, the utility model provides a frequency conversion all-in-one machine, include: frequency converter, speed reducer and motor, characterized by, the frequency converter includes the aforesaid aspect and its multiple embodiment's conversion structure.

Through the aforesaid is right the utility model discloses the description of a plurality of embodiments can understand the utility model provides a conversion structure can be fixed in the different positions needs of equipment head or afterbody according to the frequency conversion all-in-one, realizes position control and quick assembly disassembly to the reactance case to conversion easy operation is convenient. Therefore, the problem that the operation of the traditional frequency conversion all-in-one machine is complex because the frequency conversion part needs to be integrally disassembled can be solved, and the scheme of independently designing two sets of frequency conversion all-in-one machines is not needed to adapt to different application scenes.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a schematic structural diagram showing a frequency conversion all-in-one machine arranged with a conversion structure according to an embodiment of the present invention;

fig. 2a is a schematic structural diagram illustrating a reactance box of a conversion structure according to an embodiment of the present invention;

fig. 2b is a partially enlarged schematic view of a reactance box showing a conversion structure according to an embodiment of the present invention; and

fig. 3 is a schematic structural diagram of a frequency conversion housing showing a conversion structure according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few, and not all, of the disclosed embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Fig. 1 is a schematic structural diagram showing a frequency conversion all-in-one machine arranged with a conversion structure according to an embodiment of the present invention. As shown in fig. 1, the conversion structure of the present invention may include a frequency conversion housing 110 and a reactance box 120. The left and right sides of the inverter case may be respectively disposed with a first connector 111 and a plurality of connection terminals 112. The reactance box can be detachably fixed to any one of two sides of the frequency conversion housing through the first connecting piece and the plurality of connecting terminals (the reactance box is fixed to the right side of the frequency conversion housing in the figure). In one embodiment, the number of terminals on one side of the inverter housing may be the same as the number of terminals on the other side. Further, each connection terminal on the one side may be connected to an internal electrical component of the frequency converter, while the connection terminals on the other side may also have a similar connection to the internal electrical component of the frequency converter. That is, the electrical components of the inverter are internally connected to the terminals corresponding to each other on both sides, respectively, so as to form a parallel connection relationship of the terminals on both sides inside the inverter. Therefore, the reactance box can be connected with the frequency converter through the wiring terminal on any one of the two sides according to the requirement of installing the frequency conversion all-in-one machine on the underground equipment.

After the position of the underground variable frequency all-in-one machine fixed on the equipment is determined, whether the position of the reactance box interferes with the equipment or not can be judged. If need adjust the position of reactance case, the utility model discloses an overall operation of scheme is simple. The reactance box can be quickly detached by detaching fasteners (such as fastening bolts) for connecting the reactance box and the frequency conversion shell. And then, the reactance box is installed on the other side of the frequency conversion shell through a fastener. Then, the connecting line of the reactance box is connected with the wiring terminal on one side of the frequency conversion shell, and the conversion operation of the reactance box can be completed quickly. The utility model discloses a converter upper cover and reactance case apron need not dismantled to the scheme, also need not to carry out complicated disconnect operation. Therefore, the rapid disassembly and assembly operation can be directly realized under the mine, and the overall working efficiency can be improved.

The overall structural relationship of the frequency conversion all-in-one machine with the conversion structure is described in detail with reference to fig. 1, and the specific structure of the conversion structure and the connection and position relationship between the components thereof will be further explained with reference to fig. 2a, fig. 2b and fig. 3.

Fig. 2a is a schematic structural diagram illustrating a reactance box 120 of a conversion structure according to an embodiment of the present invention. As shown in fig. 2a, the reactance box 120 is fixed to one side of the frequency conversion housing, which may include a second connection 121. The second connecting piece is fixed on one side of the outer surface of the reactance box facing the frequency conversion shell, and a plurality of first mounting holes 122 are arranged on the outer edge of the second connecting piece for fixing the second connecting piece and the first connecting piece so as to fix the reactance box on one side of the frequency conversion shell.

Further, a wiring cavity 123 is arranged inside the reactance box 120. In the wiring cavity, an electric part external wiring of the internal circuit of the reactance box can be connected with the wiring terminal, so that the reactance box is connected with the circuit of the frequency converter, and a complete frequency conversion system is formed. The reactance case with after binding post accomplishes the line connection, the reactance case can also include the protection casing 126 that supports the flame proof function, its cover in on the wiring cavity, and arrange in the wiring cavity is kept away from one side of frequency conversion casing, in order to be used for right the wiring cavity carries out explosion-proof. In addition, in order to achieve a stable connection between the reactance box and the frequency conversion housing, a plurality of second mounting holes 124 are arranged on the outer edge of the inner surface of the wiring cavity, so as to fix the reactance box on the side of the frequency conversion housing where the reactance box is not interfered (or not interfered) with the equipment by, for example, fastening bolts passing through the plurality of second mounting holes and the plurality of first mounting holes.

In one application scenario, when the position of the reactance box interferes with peripheral equipment or the space of one side of the reactance box is limited, the reactance box can be quickly disassembled and installed to the other side of the frequency conversion shell. Specifically, the protective cover covering the wiring cavity may be removed first. And then, the connection between the external connection wire of the electric component in the reactance box and the wiring terminal can be disassembled. Then, the fasteners such as the fastening bolts fixed to the aforementioned plurality of first mounting holes and the plurality of second mounting holes may be removed. At this time, the reactance box can be detached from one side of the frequency conversion housing. Further, the reactance box is fixed on the other side of the frequency conversion shell. Conversely, a plurality of fasteners such as fastening bolts may be first installed in the first and second installation holes. Then, an external connection of the reactance box can be connected with the connection terminal. And finally, covering the protective cover on the wiring cavity, thereby finally completing the left-right exchange of the reactance box at the two sides of the frequency conversion shell. It can be understood that the utility model discloses a scheme makes the dismouting process simple operation of whole reactance case, and the wiring is simple. Further, to the application scene that probably interferes with other equipment in reactance case position, the utility model discloses a scheme makes its installation more nimble through providing two reactance case mounted positions to be adapted to different operating modes.

Fig. 2b is a partially enlarged schematic view illustrating a reactance box of a conversion structure according to an embodiment of the present invention. As shown in the enlarged view of fig. 2b, the wiring cavity 123 has an opening 125 facing the inverter housing. When the reactance box is fixed on any side of the frequency conversion shell, the aforementioned multiple connection terminals 112 can pass through the opening 125 to enter the connection cavity so as to be connected with the line of the reactance box.

Fig. 3 is a schematic structural diagram of a frequency conversion housing showing a conversion structure according to an embodiment of the present invention. As shown in fig. 3, a plurality of terminals 112 (for example, explosion-proof threads) are disposed on one side of the inverter housing. The utility model discloses a scheme makes its electric piece inside with the converter carry out internal connection in advance to the dismouting during the reactance case, only need carry out the reactance case with binding post's joint can be accomplished the joint of taking apart of reactance case and converter. Further, a first connecting member (e.g., a square flange) is fixed to one side of the frequency converter, and a plurality of openings 113 are arranged at an outer edge portion of the first connecting member and/or the second connecting member for abutting against the first mounting hole and/or the second mounting hole, so that the reactance box can be fixedly connected to the second connecting member by, for example, fastening bolts, and the reactance box is fixed to any one side of the frequency conversion housing.

Although not shown in fig. 3, it can be understood by those skilled in the art that both sides of the inverter housing have the same structure, and the connection terminal of one side of the inverter housing has the same function as the connection terminal of the other side thereof, so that the reactance box can be wired with the inverter when it can be fixed to either side of the inverter housing. In addition, those skilled in the art will also appreciate that the present invention actually discloses a frequency conversion all-in-one machine (as shown in fig. 1), which may include a frequency converter, a speed reducer and a motor. In one embodiment, the frequency converter is used to convert high voltage ac power to variable frequency low voltage ac power. Further, the motor can be used for receiving the low-voltage alternating current output by the frequency converter so as to drive the rotating shaft of the motor to rotate. In addition, the reducer may include: the input end is connected with a rotating shaft of the motor so as to rotate along with the rotating shaft; an output end rotating at a lower rotational speed than the input end; and a transmission device arranged between the input end and the output end, and used for transmitting the power of the input end to the output end and reducing the rotating speed of the output end relative to the rotating speed of the input end. Further, the converter can include the utility model discloses a conversion structure.

According to the demand of using the scene, the utility model discloses a frequency conversion all-in-one can realize directly driving frequency conversion speed governing all-in-one for mining explosion-proof. In this case, the variable frequency all-in-one machine may be a direct drive (e.g., a permanent magnet direct drive all-in-one machine or an asynchronous direct drive all-in-one machine). The torque obtained by the frequency conversion all-in-one machine is relatively large, and energy is further saved. In addition, because the inside design has the speed reducer structure, can be in the inside of frequency conversion all-in-one with the rotational speed of speed regulation to needs to can directly export on the load equipment. Because this directly drives do not have other connection structure (like the speed reducer, cross a section of thick bamboo, shaft coupling etc.) between Variable Frequency Speed Governing (VFSG) all-in-one and the load equipment, thereby can be directly with the utility model discloses a power and the moment of torsion of variable frequency all-in-one transmit in the middle of the load equipment. Therefore, for current all-in-one, the utility model discloses a directly drive Variable Frequency Speed Governing (VFSG) all-in-one small, no connection structure to occupation space is little, and easy operation.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present disclosure are used to distinguish between different objects and are not used to describe a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of illustration and not of limitation. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The following claims are intended to define the scope of the invention and, therefore, to cover module compositions, equivalents, or alternatives falling within the scope of these claims.

Claims

1. A conversion architecture for a frequency converter, comprising:

the frequency conversion device comprises a frequency conversion shell (110), wherein a first connecting piece (111) and a plurality of wiring terminals (112) are respectively arranged on two sides of the frequency conversion shell; and

a reactance box (120) detachably fixed to any one of two sides of the frequency conversion housing through the first connector (111) and the plurality of connection terminals (112).

2. The conversion arrangement according to claim 1, characterized in that the reactance box (120) comprises a second connection (121) fixed to the side of the outer surface of the reactance box (120) facing the frequency conversion housing (110) for fixedly connecting the reactance box (120) with the frequency conversion housing.

3. The conversion arrangement according to claim 2, characterized in that the outer edge of the second connector (121) is arranged with a plurality of first mounting holes (122) for fixing the reactance box (120) to the frequency conversion housing (110).

4. The conversion arrangement according to claim 3, characterized in that the reactance box (120) is internally arranged with a wiring cavity (123) having an opening (125) towards the frequency conversion housing.

5. The transition structure according to claim 4, characterized in that the connection terminals (112) enter the connection cavities (123) through the openings (125) in order to make a connection with the lines of the reactance boxes (120).

6. The conversion arrangement according to claim 5, characterized in that the outer edges of the inner surface of the wiring cavity (123) are arranged with a plurality of second mounting holes (124) for fixing the reactance box (120) to the frequency conversion housing (110).

7. The conversion structure according to claim 6, wherein the reactance box (120) further comprises a protective cover (126) supporting a flame-proof function, which covers the wiring cavity (123) and is arranged on a side of the wiring cavity (123) far away from the frequency conversion housing (110).

8. The switching architecture according to claim 1, characterized in that the terminals (112) of the frequency conversion housing (110) on one side have the same function as the terminals (112) on the other side, so that the reactance boxes (120) are wired with the frequency converter when they are fixed on either side of the frequency conversion housing (110).

9. The transition structure according to claim 6, characterized in that the first connector (111) is arranged with a plurality of openings (113) interfacing with the first mounting hole (122) and/or the second mounting hole (124) for fixing the reactance box (120) to either side of the frequency conversion housing (110).

10. A variable frequency all-in-one machine comprising: frequency converter, reduction gear and motor, characterized in that the frequency converter comprises a conversion structure according to any one of claims 1-9.