CN211127592U - Voltage conversion device - Google Patents
Voltage conversion device Download PDFInfo
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- CN211127592U CN211127592U CN201922385870.6U CN201922385870U CN211127592U CN 211127592 U CN211127592 U CN 211127592U CN 201922385870 U CN201922385870 U CN 201922385870U CN 211127592 U CN211127592 U CN 211127592U
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Abstract
The application discloses voltage conversion device includes: the device comprises a bearing plate, a metal shell with a cavity is detachably arranged on the bearing plate, and a single-phase voltage transformer and a three-phase voltage transformer which are used for carrying out voltage conversion on target voltage are packaged in the metal shell; each of the single-phase voltage transformers and the three-phase voltage transformers is a voltage transformer with a load capacity of 10 VA. Because the space volume that the voltage transformer that load capacity is 10VA will be less than the occupied space volume of the voltage transformer that load capacity is 50VA, so, compare in prior art, through this voltage conversion device, not only can satisfy the concrete demand of actual engineering project, moreover, when coming the output voltage of low-voltage unit to convert through this voltage conversion device, can also show the reduction when carrying out voltage conversion to low-voltage unit required occupation space volume and equipment cost.
Description
Technical Field
The utility model relates to a low voltage distribution technical field, in particular to voltage conversion equipment.
Background
In the hydropower stations established in China, 90% of small and medium-sized hydropower stations are small and more than 85% of small-sized hydropower stations are low-voltage unit hydropower stations, wherein the output voltage of a low-voltage unit is generally AC400V, in addition, the low-voltage distribution field also needs to collect AC400V bus or incoming line voltage, and in the actual engineering project, common sampling instruments, relay protection devices and the like are designed according to the sampling voltage of AV 100V. In this case, we usually need to utilize a voltage conversion circuit to convert the output voltage of the low-voltage unit or the AC400V voltage in the field of power distribution into the low-voltage power of AC100V for the use of the sampling instrument and the relay protection device.
Referring to fig. 1, fig. 1 is a circuit structure diagram of a voltage conversion circuit for a low-voltage unit in the prior art, the voltage conversion circuit is composed of a group of single-phase voltage transformers and a group of three-phase voltage transformers, and a total of four voltage transformers, wherein primary windings of the single-phase voltage transformers and the three-phase voltage transformers are connected with a peripheral circuit of the low-voltage unit, and secondary windings of the single-phase voltage transformers and the three-phase voltage transformers are respectively connected with corresponding loads. In the prior art, the load capacity of each voltage transformer is 50VA, and the voltage transformer of this type is bulky, so that the circuit structure needs to occupy a large space volume and needs high equipment cost. At present, no effective solution exists for the problem.
Therefore, it is obvious that how to reduce the space volume and equipment cost required for voltage conversion in the field of low-voltage units and power distribution is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a voltage conversion device to reduce the space volume and equipment cost required for voltage conversion of low voltage units and power distribution fields. The specific scheme is as follows:
a voltage conversion device comprising: the device comprises a bearing plate, a power supply and a control circuit, wherein a metal shell with a cavity is detachably arranged on the bearing plate, and a single-phase voltage transformer and a three-phase voltage transformer for voltage conversion of a target voltage are packaged in the metal shell; each of the single-phase voltage transformers and the three-phase voltage transformers is a voltage transformer with a load capacity of 10 VA.
Preferably, the metal shell is made of an aluminum-zinc plated plate.
Preferably, the metal shell is an integrally formed shell.
Preferably, the metal shell is provided with heat dissipation holes.
Preferably, the grounding ends of the primary winding and the secondary winding of each three-phase voltage transformer are in short circuit and are all packaged in the metal shell.
Preferably, the single-phase voltage transformer and/or the voltage transformer in the three-phase voltage transformer is a voltage transformer with the model number of WGSYD-X.
Preferably, the voltage transformer in the single-phase voltage transformer and/or the three-phase voltage transformer is a voltage transformer with a voltage transformation ratio of 400V/100V.
Preferably, the bearing plate is further provided with a first wiring terminal group for leading out the wiring of the primary windings of the single-phase voltage transformer and the three-phase voltage transformer, and a second wiring terminal group for leading out the wiring of the secondary windings of the single-phase voltage transformer and the three-phase voltage transformer.
Preferably, the first terminal group and the second terminal group are provided with protective covers.
Preferably, the protective cover is made of PVC.
Obviously, in the voltage conversion device provided by the utility model, because be the voltage transformer that is 50VA with load capacity for load capacity is replaced by load capacity is 10 VA's voltage transformer, and load capacity is 10 VA's voltage transformer not only can satisfy the voltage acquisition demand to the target load in the actual engineering project, and moreover, load capacity is 10 VA's voltage transformer will be than load capacity be 50 VA's voltage transformer shared space volume little and equipment cost is lower, so, compare in prior art, through the utility model provides a voltage conversion device, not only can satisfy the concrete demand of actual engineering project, moreover, also can reduce single-phase voltage transformer and three-phase voltage transformer and to the volume of occuping of space. And when the single-phase voltage transformer and the three-phase voltage transformer are packaged in the metal shell together, the occupation amount of the single-phase voltage transformer and the three-phase voltage transformer to the space volume can be further reduced. Therefore, when the voltage conversion device is used for converting the output voltage of the low-voltage unit, the occupied space volume and the equipment cost when the voltage conversion is carried out on the low-voltage unit or the power distribution field can be obviously reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a circuit structure diagram of a low-voltage unit during voltage conversion in the prior art;
fig. 2 is a structural diagram of a voltage conversion device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a voltage conversion device according to an embodiment of the present invention;
FIG. 4 is a schematic view of a heat dissipation hole formed in a metal housing;
FIG. 5 is a schematic diagram of the primary and secondary winding grounds in a three-phase voltage transformer;
fig. 6 is a structural diagram of another voltage conversion device according to an embodiment of the present invention;
fig. 7 is a structural diagram of a protective cover according to an embodiment of the present invention.
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. 2, fig. 2 is a structural diagram of a voltage conversion device according to an embodiment of the present invention, the voltage conversion device includes: the device comprises a bearing plate 11, wherein a metal shell 12 with a cavity is detachably arranged on the bearing plate 11, and a single-phase voltage transformer 13 and a three-phase voltage transformer 14 for voltage conversion of a target voltage are packaged in the metal shell 12; each of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 is a voltage transformer having a load capacity of 10 VA.
In the present embodiment, a voltage conversion device is provided, by which the occupation amount of a space volume in the process of voltage conversion of a low-voltage unit or a power distribution field can be significantly reduced. In the voltage conversion apparatus provided in this embodiment, first, a loading board 11 is provided, a detachable metal casing 12 with a cavity is provided on the loading board 11, then, a single-phase voltage transformer 13 and a three-phase voltage transformer 14 for performing voltage conversion on a target voltage are packaged in the metal casing 12, and each of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 is a voltage transformer with a load capacity of 10VA, where the single-phase voltage transformer 13 is composed of one voltage transformer with a load capacity of 10VA, and the three-phase voltage transformer 14 is composed of three voltage transformers with a load capacity of 10VA, that is, in the voltage conversion apparatus provided in this embodiment, a total of four voltage transformers with a load capacity of 10VA are provided.
It can be thought that when the single-phase voltage transformer 13 and the three-phase voltage transformer 14 are jointly packaged in the metal shell 12, not only the structure of the voltage conversion device can be more compact and beautiful, but also because the volume of the voltage transformer with the load capacity of 10VA is far smaller than that of the voltage transformer with the load capacity of 50VA, when four voltage transformers with the load capacity of 50VA are replaced by four voltage transformers with the load capacity of 10VA, the occupation amount of the space volume of the voltage conversion device can be remarkably reduced, and the voltage transformer with the load capacity of 10VA can also meet the specific requirements in the actual engineering project.
In addition, when four voltage transformers with the load capacity of 10VA are packaged in the metal shell 12 together, the occupation amount of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 to the space volume can be further reduced. Referring to fig. 3, fig. 3 is a schematic diagram of a voltage conversion device according to an embodiment of the present invention.
It should be noted that, in this embodiment, the loading plate 11 may be a steel plate or an iron plate as long as it can bear the total weight of the single-phase voltage transformer 13 and the three-phase voltage transformer 14; in addition, the material of the metal housing 12 with the cavity may be any material that can prevent electrical leakage, such as: cast steel, cast iron, cast aluminum, and the like, and are not particularly limited herein.
It should be noted that, in practical applications, parameters of the voltage transformer may be modified according to needs of practical situations, for example, the voltage transformation ratio is adjusted to 415V/100V, 440V/100V, 480V/100V, and the like, or the frequency of the voltage transformer is changed to 50Hz to 60Hz, which is not limited herein.
In a specific implementation process, in order to ensure that the metal shell 12 can be stably mounted on the bearing plate 11, a screw hole may be formed in the bearing plate 11, and then the metal shell 12 is screwed onto the bearing plate 11 by a screw; alternatively, the metal housing 12 and the carrier plate 11 may be connected in a snap-fit manner, as long as the carrier plate 11 and the metal housing 12 can be detachably connected.
In addition, in practical application, the single-phase voltage transformer 13 and the three-phase voltage transformer 14 are not connected through a hard wire, and whether the zero line between the single-phase voltage transformer 13 and the three-phase voltage transformer 14 is connected or not can be connected outside the device according to actual conditions.
In addition, the space volume occupied by the voltage conversion device provided by the embodiment in practical application is about one third of the space occupied by four voltage transformers with the load capacity of 50VA, so that the space volume occupied by the voltage conversion device is reduced, and the consumption of electric energy is relatively saved.
Obviously, in the voltage conversion device provided in this embodiment, because the voltage transformer with the load capacity of 50VA is replaced by the voltage transformer with the load capacity of 10VA, and the voltage transformer with the load capacity of 10VA not only can meet the voltage acquisition requirement for the target load in the actual engineering project, but also the voltage transformer with the load capacity of 10VA has a smaller space volume and lower equipment cost than the voltage transformer with the load capacity of 50VA, compared with the prior art, the voltage conversion device provided in this embodiment can not only meet the specific requirement of the actual engineering project, but also reduce the occupied amount of the single-phase voltage transformer and the three-phase voltage transformer for the space volume. And when the single-phase voltage transformer and the three-phase voltage transformer are packaged in the metal shell together, the occupation amount of the single-phase voltage transformer and the three-phase voltage transformer to the space volume can be further reduced. Therefore, when the voltage conversion device is used for converting the output voltage of the low-voltage unit, the occupied space volume and the equipment cost when the voltage conversion is carried out on the low-voltage unit or the power distribution field can be obviously reduced.
Based on the above embodiments, the technical solution of the present embodiment is further described and optimized, and as a preferred embodiment, the metal casing 12 is specifically a casing made of an aluminum-plated zinc plate.
Specifically, in this embodiment, the metal casing 12 may be made of an aluminum-plated zinc plate, and since the aluminum-plated zinc plate generates a thin and dense basic zinc carbonate film on the surface thereof at normal temperature, the aluminum-plated zinc plate can prevent further oxidation of the aluminum-plated zinc, and has excellent corrosion resistance, and the aluminum-plated zinc plate also has excellent heat resistance and can be used in a high-temperature environment of 315 ℃.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, and as a preferred embodiment, the metal shell 12 is specifically an integrally formed shell.
It can be understood that, in the process of actually using the voltage collecting device, the single-phase voltage transformer 13 and the three-phase voltage transformer 14 in the metal casing 12 inevitably have an abnormality or a fault, so in this embodiment, in order to improve the maintenance efficiency of the worker, the metal casing 12 is configured as an integrally formed casing, that is, when the worker detaches or installs the metal casing 12, the worker only needs to detach or install the metal casing 12 integrally, and does not need to detach or reassemble the metal casing 12 separately.
Obviously, through the technical scheme provided by the embodiment, the maintenance efficiency of the worker in the maintenance process of the voltage conversion device can be relatively improved.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 4, where fig. 4 is a schematic view of a heat dissipation hole formed in a metal housing; in a preferred embodiment, the metal housing 12 is provided with heat dissipation holes 120.
It is conceivable that, in actual use, because the single-phase voltage transformer 13 and the three-phase voltage transformer 14 are enclosed in the metal casing 12, the single-phase voltage transformer 13 and the three-phase voltage transformer 14 inevitably emit heat during use, and the voltage transformers may be short-circuited under high temperature conditions, thereby affecting stable operation of the voltage conversion device.
Therefore, in this embodiment, in order to ensure normal heat dissipation of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 in the using process, the heat dissipation holes 120 are formed in the metal casing 12, so that heat dissipated by the single-phase transformer and the three-phase transformer can be timely discharged out of the metal casing 12, and thus it is ensured that the temperature inside the metal casing 12 is not too high and normal operation of the voltage conversion device is not affected.
Based on the above embodiments, the technical solution is further explained and optimized in this embodiment, please refer to fig. 5, and fig. 5 is a schematic diagram of grounding ends of a primary winding and a secondary winding in a three-phase voltage transformer; in a preferred embodiment, the grounding ends of the primary winding and the secondary winding of each of the three-phase voltage transformers 14 are short-circuited internally and are all encapsulated in the metal shell 12.
It can be understood that, in practical application, in order to ensure normal operation of the single-phase voltage transformer 13 and the three-phase voltage transformer 14, grounding processing is generally required to be performed on grounding ends of a primary winding and a secondary winding of each voltage transformer in the three-phase voltage transformer 14, and each grounding terminal in the three-phase voltage transformer 14 adopts what grounding processing mode, which does not affect the normal use process of the three-phase voltage transformer 14. Therefore, in the present embodiment, in order to reduce the number of wirings present outside the metal case 12, the ground terminals of the respective three-phase voltage transformers 14 are internally short-circuited, and then all are enclosed in the metal case 12.
Obviously, through the technical scheme provided by the embodiment, the wiring number of the voltage acquisition device in the use process can be relatively reduced.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, and as a preferred implementation, the voltage transformers in the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 are specifically voltage transformers of model WGSYD-X.
Specifically, in the present embodiment, the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 is set to WGSYD-X. Because the WGSYD-X is common in practical engineering projects, and the WGSYD-X can also perform stable operation at a temperature of-35 ℃ to +65 ℃, when the voltage transformer of the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 is set as the WGSYD-X, not only the overall ease of use of the voltage conversion apparatus in the manufacturing process can be relatively improved, but also the voltage conversion apparatus can be made to be suitable for more practical application scenarios.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the voltage transformers in the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 are specifically voltage transformers with a voltage transformation ratio of 400V/100V.
It can be understood that the domestic ac voltage in China is generally distributed around 100V to 380V, so in this embodiment, in order to adapt to this actual situation, the voltage transformation ratio of the voltage transformer in the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 is set to 400V/100V. Obviously, by such an arrangement, the voltage transformers in the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 can directly perform transformation ratio processing on relatively common alternating voltages, so that the universality of the voltage conversion device in practical application can be further improved.
In addition, when the voltage transformation ratio of the voltage transformers in the single-phase voltage transformer 13 and/or the three-phase voltage transformer 14 is set to 400V/100V, the voltage conversion device provided by the embodiment can be used for system bus voltage conversion of a 400V low-voltage unit, voltage conversion of a generator, acquisition of 400V bus voltage or incoming line voltage in the low-voltage distribution field, and the like. Further, since the voltage converter according to the present embodiment supports the input voltage of the highest AC560V, the voltage converter can be applied to a 400V hydroelectric power station, a low-voltage distribution field, and the like, which have large voltage fluctuations.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 6, where fig. 6 is a structural diagram of another voltage conversion device provided by the embodiment of the present invention; in a preferred embodiment, the carrier plate 11 is further provided with a first connection terminal group 15 for leading out the primary winding connections of the single-phase voltage transformer 13 and the three-phase voltage transformer 14, and a second connection terminal group 16 for leading out the secondary winding connections of the single-phase voltage transformer 13 and the three-phase voltage transformer 14.
In this embodiment, in order to facilitate the use of the voltage acquisition device by the staff in the actual engineering project, a first connection terminal group 15 for leading out the primary winding connection of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 and a second connection terminal group 16 for leading out the secondary winding connection of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 are further provided on the bearing plate 11.
It is conceivable that, after the first connection terminal group 15 and the second connection terminal group 16 are provided, in the process of using the voltage conversion device, the worker does not need to manually connect the primary winding wiring and the secondary winding wiring of the single-phase voltage transformer 13 and the three-phase voltage transformer 14 which are enclosed inside the metal case 12, and moreover, direct contact with the electrical components can be avoided, thereby further improving the overall usability of the voltage conversion device in the actual use process.
In a preferred embodiment, each of the first and second terminal groups 15 and 16 is provided with a protective cover 17.
Because the first connection terminal group 15 and the second connection terminal group 16 are used for leading out the primary winding connection and the secondary winding connection of the single-phase voltage transformer 13 and the three-phase voltage transformer 14, respectively, that is, a part of the first connection terminal group 15 and the second connection terminal group 16 is packaged inside the metal shell for connecting the single-phase voltage transformer 13 and the three-phase voltage transformer 14, and the other part is arranged outside for connecting engineering projects.
It is conceivable that, when the first and second terminal groups 15 and 16 are disposed outside the metal case 12, dust, moisture, and light in the external environment may not only affect the normal use of the first and second terminal groups 15 and 16, but also accelerate the degree of aging of the first and second terminal groups 15 and 16. Therefore, in the present embodiment, the protection covers 17 are further disposed on the first and second connection terminal groups 15 and 16, so as to avoid the loss and influence of dust, moisture and light irradiation in the external environment on the first and second connection terminal groups 15 and 16.
Referring to fig. 7, fig. 7 is a structural diagram of a protective cover 17 according to an embodiment of the present invention. Of course, in practical applications, the protective cover 17 may be provided as a protective cover having another shape as long as the purpose of practical applications can be achieved.
In a preferred embodiment, the protective cover 17 is made of PVC.
Specifically, in the present embodiment, the protection covers 17 on the first and second connection terminal groups 15 and 16 are made of PVC, because the PVC has good moisture diffusibility, and good aging resistance, ultraviolet irradiation resistance and chemical corrosion resistance. Therefore, after the protection covers 17 made of PVC are disposed on the first and second connection terminal groups 15 and 16, corrosion and damage of moisture, ultraviolet rays and chemical gases in the external environment to the first and second connection terminal groups 15 and 16 can be avoided, and thus the service lives of the first and second connection terminal groups 15 and 16 can be relatively prolonged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A voltage conversion apparatus, comprising: the device comprises a bearing plate, a power supply and a control circuit, wherein a metal shell with a cavity is detachably arranged on the bearing plate, and a single-phase voltage transformer and a three-phase voltage transformer for voltage conversion of a target voltage are packaged in the metal shell; each of the single-phase voltage transformers and the three-phase voltage transformers is a voltage transformer with a load capacity of 10 VA.
2. The voltage conversion device according to claim 1, wherein the metal casing is a casing made of aluminum-plated zinc plate.
3. The voltage conversion device according to claim 1, characterized in that the metal housing is embodied as an integrally formed housing.
4. The voltage conversion device of claim 1, wherein the metal housing is provided with heat dissipation holes.
5. The voltage conversion device according to claim 1, wherein the ground ends of the primary winding and the secondary winding of each of the three-phase voltage transformers are short-circuited internally and are all encapsulated in the metal shell.
6. Voltage conversion arrangement according to claim 1, characterized in that the voltage transformers of the single-phase voltage transformers and/or the three-phase voltage transformers are in particular voltage transformers of the type WGSYD-X.
7. The voltage conversion device according to claim 1, wherein the voltage transformer of the single-phase voltage transformer and/or the three-phase voltage transformer is a voltage transformer having a voltage transformation ratio of 400V/100V.
8. The voltage conversion device according to any one of claims 1 to 7, wherein a first connection terminal group for leading out primary winding connections of the single-phase voltage transformer and the three-phase voltage transformer, and a second connection terminal group for leading out secondary winding connections of the single-phase voltage transformer and the three-phase voltage transformer are further provided on the carrier plate.
9. The voltage conversion device according to claim 8, wherein a protective cover is provided on each of the first and second terminal groups.
10. The voltage conversion device according to claim 9, wherein the protective cover is a protective cover made of PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385870.6U CN211127592U (en) | 2019-12-26 | 2019-12-26 | Voltage conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385870.6U CN211127592U (en) | 2019-12-26 | 2019-12-26 | Voltage conversion device |
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| Publication Number | Publication Date |
|---|---|
| CN211127592U true CN211127592U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922385870.6U Active CN211127592U (en) | 2019-12-26 | 2019-12-26 | Voltage conversion device |
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|---|---|
| CN (1) | CN211127592U (en) |
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