CN211507333U

CN211507333U - Water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply

Info

Publication number: CN211507333U
Application number: CN201922344336.0U
Authority: CN
Inventors: 于兴益
Original assignee: YIXING XINGYI SPECIAL TRANSFORMER CO Ltd
Current assignee: YIXING XINGYI SPECIAL TRANSFORMER CO Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-09-15
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply, including transformer housing, install three at least single-phase transformers in the transformer housing, every single-phase transformer all includes the iron core and around locating primary and secondary on the iron core, transformer housing is last to be corresponding to every single-phase transformer all is provided with leading-out terminal copper billet and star connection terminal copper billet, the cooling water inlet has been seted up on the leading-out terminal copper billet, the cooling water delivery port has been seted up on the star connection terminal copper billet, secondary is outer coaxial around being equipped with the water-cooling pipe, the one end of water-cooling pipe with cooling water inlet intercommunication, the other end with cooling water delivery port intercommunication. The utility model discloses a heat in the transformer housing is taken away in the circulation flow of cooling water, carries out the water-cooling to the secondary side, has improved the radiating efficiency of transformer greatly.

Description

Water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply

Technical Field

The utility model relates to a transformer technical field especially relates to a water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, main components are a primary coil, a secondary coil and an iron core, and the transformer has the following main functions: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, and the like. It can be divided into power transformer and special transformer according to the purpose.

The power supply of the carbon fiber production line needs to use a transformer. Most of the existing transformers adopt a natural cooling mode, so that the heat dissipation efficiency is low, the cooling time is long, the heat cannot be dissipated in time due to long-time work, and the working reliability is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art's shortcoming, provide a water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply.

In order to solve the technical problem, the technical scheme of the utility model as follows:

the utility model provides a water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply, includes transformer housing, install three at least single-phase transformers in the transformer housing, every single-phase transformer all includes the iron core and around locating primary and secondary on the iron core, transformer housing is last corresponding to every single-phase transformer all is provided with leading-out terminal copper billet and star connection terminal copper billet, the cooling water inlet has been seted up on the leading-out terminal copper billet, the star connection has seted up the cooling water delivery port on the terminal copper billet, secondary is outer coaxial around being equipped with the water-cooled tube, the one end of water-cooled tube with cooling water inlet intercommunication, the other end with cooling water delivery port intercommunication.

As an optimal selection scheme suitable for water-cooling dry-type transformer of large-scale carbon fiber production line power supply, wherein: the primary coil comprises four primary high-voltage coils and two primary voltage regulating coils, and the primary high-voltage coils after being connected in parallel are connected with the primary voltage regulating coils after being connected in parallel in series.

As an optimal selection scheme suitable for water-cooling dry-type transformer of large-scale carbon fiber production line power supply, wherein: the primary high-voltage coil is a double-pancake coil.

As an optimal selection scheme suitable for water-cooling dry-type transformer of large-scale carbon fiber production line power supply, wherein: the secondary coil is formed by welding red copper bars, the water-cooling pipe is a red copper pipe, and the water-cooling pipe is welded outside the secondary coil.

As an optimal selection scheme suitable for water-cooling dry-type transformer of large-scale carbon fiber production line power supply, wherein: and a thermistor switch is arranged between the primary coil and the secondary coil and is connected with an external temperature control alarm circuit.

As an optimal selection scheme suitable for water-cooling dry-type transformer of large-scale carbon fiber production line power supply, wherein: the iron core is made of cold-rolled silicon steel sheets.

The utility model has the advantages that:

(1) the utility model has the advantages that the cooling water is conveyed to the water cooling pipe outside the secondary coil through the cooling water inlet arranged on the copper block of the outgoing line terminal, the cooling water flows through the water cooling pipe and is discharged through the cooling water outlet arranged on the copper block of the star connection terminal, the heat in the transformer shell is taken away through the circulating flow of the cooling water, the secondary side is cooled by the water, and the heat dissipation efficiency of the transformer is greatly improved;

(2) the utility model discloses well secondary coil is formed by the welding of red copper bar, and the water-cooled tube is also the red copper pipe that heat transfer efficiency is high, has accelerated the heat exchange rate between water-cooled tube and the secondary coil, simultaneously, the water-cooled tube welds in the secondary coil outside, not only makes the position of water-cooled tube fixed, has increased the area of contact of water-cooled tube and secondary coil moreover, has further improved the heat exchange rate between water-cooled tube and the secondary coil, has improved the heat dispersion of transformer;

(3) the utility model has the advantages that the primary high-voltage coil is a double-cake coil, which can effectively reduce the load loss, and the heat dissipation effect is better than that of the common coil, and the mechanical strength is higher;

(4) the utility model is provided with the thermistor switch between the primary coil and the secondary coil, when the temperature inside the transformer is abnormal, the thermistor switch can feed back signals to the temperature control alarm circuit in time to remind the operator to overhaul;

(5) the utility model consists of three independent unidirectional transformers, which can better adapt to the condition of overlarge interval of the heating motors on the carbon fiber production line; and the iron core is made of cold-rolled silicon steel sheets, so that the electromagnetic performance is good, and the heating condition in the closed shell can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic diagram of a coil winding;

wherein: 1. a transformer housing; 2. an iron core; 3. a copper block of the outlet terminal; 4. a star connection terminal copper block; 5. a cooling water inlet; 6. a cooling water inlet; 7. a water-cooled tube; 8. a primary high voltage coil; 9. a primary voltage regulating coil; 10. a secondary coil.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Referring to fig. 1 to 4, the embodiment provides a water-cooled dry-type transformer suitable for power supply in a large-scale carbon fiber production line, which includes a transformer housing 1, and three independent single-phase transformers are installed in the transformer housing 1.

Each single-phase transformer includes an iron core 2, and a primary coil and a secondary coil 10 wound around the iron core 2. The primary coils comprise four primary high voltage coils 8 and two primary voltage regulating coils 9, and the secondary coils 10 comprise three secondary low voltage coils. The four parallel primary high-voltage coils 8 are connected with the two parallel primary voltage regulating coils 9 in series, and the primary coils and the secondary coils 10 are wound on the iron core 2 in a staggered manner. The primary and secondary coils 10 are alternately wound, so that the impedance of the transformer is relatively increased, the short circuit of the secondary side can be effectively prevented, and the protection effect on the installation and the use of the transformer is realized.

The primary high-voltage coil 8 adopts a double-pancake coil, so that the load loss can be effectively reduced, the heat dissipation effect is superior to that of other coils, the mechanical strength is high, and the high-voltage coil is suitable for being used under the condition of low voltage and high current. The secondary coil 10 is soldered by a T2 red copper bar.

The transformer shell 1 is provided with an outgoing terminal copper block 3 and a star-connected terminal copper block 4 corresponding to each single-phase transformer. A cooling water inlet channel is arranged in the outlet terminal copper block 3, and the cooling water inlet channel extends from one end of the upper part of the outlet terminal copper block 3 to one side of the outlet terminal copper block 3 in the transformer shell 1. And a cooling water outlet channel is formed in the star connection terminal copper block 4 and extends upwards from the lower end of the star connection terminal copper block 4 to the upper end face of the star connection terminal copper block 4. A water-cooling tube 7 is also arranged in the transformer shell 1, one end of the water-cooling tube 7 is connected with the water outlet end of the cooling water inlet channel in the outlet terminal copper block 3, and the other end is wound outside the secondary coil 10 and then communicated with the water inlet end of the cooling water outlet channel in the star-connected terminal copper block 4.

Preferably, the water-cooling tube 7 is a copper tube, and the copper tube is coaxially welded to the outside of the secondary coil 10.

In addition, a thermal switch is also provided in the transformer housing 1 between the primary coil and the secondary coil 10, and the thermal switch is located in an external temperature control alarm circuit. The thermal sensitive switch utilizes different thermal expansion coefficients of all component layers of the bimetallic strip, when the temperature change in the transformer is abnormal, the deformation of the active layer is larger than that of the passive layer, so that the bimetallic strip bends towards one side of the passive layer, the temperature control alarm circuit is switched on, a loop is formed, the alarm alarms, and an operator is reminded to overhaul in time.

It should be noted that, since the temperature control alarm circuit is a simple circuit, the circuit will not be described in detail.

When the transformer shell is used, deionized cooling water enters a cooling water inlet channel from a cooling water inlet 65 on the outgoing terminal copper block 3, then enters the water cooling pipe 7, flows along the water cooling pipe 7, takes away heat in the secondary coil 10 and the transformer shell 1 in the flowing process, then enters a cooling water outlet channel in the star connection terminal copper block 4, and finally is discharged from a cooling water outlet at the upper end of the star connection terminal copper block 4.

Therefore, the utility model discloses a heat in the transformer housing 1 is taken away in the circulation flow of cooling water, carries out the water-cooling to the secondary side, has improved the radiating efficiency of transformer greatly.

In addition to the above embodiments, the present invention may have other embodiments; all the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides a water-cooling dry-type transformer suitable for large-scale carbon fiber production line power supply, includes transformer housing (1), install three at least single-phase transformers in transformer housing (1), every single-phase transformer all includes iron core (2) and around locating primary coil and secondary coil (10) on iron core (2), its characterized in that: the transformer is characterized in that the transformer shell (1) is provided with an outgoing line terminal copper block (3) and a star connection terminal copper block (4) corresponding to each single-phase transformer, a cooling water inlet (6) (5) is formed in the outgoing line terminal copper block (3), a cooling water outlet is formed in the star connection terminal copper block (4), a water cooling pipe (7) is coaxially wound outside the secondary coil (10), one end of the water cooling pipe (7) is communicated with the cooling water inlet (6) (5), and the other end of the water cooling pipe is communicated with the cooling water outlet.

2. The water-cooled dry-type transformer suitable for large-scale carbon fiber production line power supply of claim 1, characterized in that: the primary coil comprises four primary high-voltage coils (8) and two primary voltage regulating coils (9), and the primary high-voltage coils (8) after being connected in parallel are connected in series with the primary voltage regulating coils (9) after being connected in parallel.

3. The water-cooled dry-type transformer suitable for large-scale carbon fiber production line power supply of claim 2, characterized in that: the primary high-voltage coil (8) is a double-pancake coil.

4. The water-cooled dry-type transformer suitable for large-scale carbon fiber production line power supply of claim 1, characterized in that: the secondary coil (10) is formed by welding red copper bars, the water-cooling pipe (7) is a red copper pipe, and the water-cooling pipe (7) is welded outside the secondary coil (10).

5. The water-cooled dry-type transformer suitable for large-scale carbon fiber production line power supply of claim 1, characterized in that: and a thermistor switch is arranged between the primary coil and the secondary coil (10), and the thermistor switch is connected with an external temperature control alarm circuit.

6. The water-cooled dry-type transformer suitable for large-scale carbon fiber production line power supply of claim 1, characterized in that: the iron core (2) is made of cold-rolled silicon steel sheets.