On-load voltage regulation device integrally embedded in transformer oil tank

Abstract

The invention provides an on-load voltage regulation device integrally embedded in a transformer oil tank, which is characterized by comprising a voltage regulation switch and a support plate, the voltage regulation switch consists of a motor driving system, a transmission mechanism, a switching assembly and a static contact plate assembly, the transformer oil tank comprises a tank cover and a transformer iron yoke, the voltage regulation switch is mounted on the upper surface of the horizontal support plate, and the transformer iron yoke is mounted on the lower surface of the support plate. Supporting plate supporting legs and a transformer iron yoke are sequentially arranged below the supporting plate, and the supporting plate supporting legs are installed on the transformer iron yoke. The voltage regulating switch is integrally embedded in the oil tank of the transformer, namely the motor and the grooved wheel mechanism are also placed in the oil tank. The sealing structure has the positive effects that the sealing problem at the joint of the two parts is eliminated; and meanwhile, holes do not need to be formed in the transformer box cover, the defects caused by opening are avoided, and convenience is brought to installation.

Description

Technical Field

[0001] The invention relates to an on-load voltage-regulating tap-changing switch installed on an on-load voltage-regulating transformer. Background Art

[0002] The basic structure of the on-load voltage-regulating tap-changer (hereinafter referred to as the voltage-regulating switch) installed on the on-load voltage-regulating transformer is a (reduction) motor drive system, a groove wheel mechanism, a connecting rod, a switching assembly and a static contact plate assembly, wherein the motor drive system is used as a power source, and the transmission mechanism composed of the groove wheel mechanism and the connecting rod provides power for the switching assembly, so that the switching assembly cooperates with the static contact plate assembly to achieve voltage regulation. The oil tank cover of the transformer oil tank includes an inner and outer side. The method of installing the voltage-regulating switch on the on-load voltage-regulating transformer is that the motor drive system and the groove wheel mechanism are installed on the outer side of the transformer oil tank cover, the connecting rod, the switching assembly and the static contact plate assembly are installed on the support plate, and the support plate is hoisted on the inner side of the transformer oil tank cover and located in the transformer oil tank, and there is also a transformer iron yoke in the oil tank. The hoisted support plate includes left and right sides, and the connecting rod, the switching assembly and the static contact plate assembly are respectively installed on the left and right sides of the support plate. It can be seen that the voltage regulating switch is divided into two parts, which are installed inside and outside the oil tank respectively. This not only increases the difficulty of installation, but also increases the difficulty of sealing the connection between the two parts, which correspondingly increases the manufacturing cost and processing difficulty of the transformer. For example, CN116884783A discloses a vacuum on-load voltage regulating switch and transformer, in which "the reduction motor 3 and the transmission gear set are installed on the top of the base 11, the output bevel gear pair 31 and the voltage regulating module 2 are arranged below the installation base 11, and the three-phase linkage shaft 4 is connected to the output bevel gear pair 31" (see paragraph 48 of its specification). When the base is fixed to the transformer, a hole needs to be opened on the transformer cover, and the transmission assembly needs to pass through the hole in the cover to be fixed. This structure is not only complicated to install, but also needs to solve the sealing problem at the connection. Summary of the invention

[0003] In order to solve the above technical problems, the object of the present invention is to provide an on-load voltage regulating device which is integrally buried in a transformer oil tank.

[0004] The object of the present invention is achieved in this way: it includes a voltage regulating switch and a support plate composed of a motor drive system, a transmission mechanism, a switching component, and a static contact plate component, and the transformer oil tank includes a box cover and a transformer iron yoke, and its characteristics are: the voltage regulating switch is installed on the upper surface of the horizontal support plate, and the support plate legs and the transformer iron yoke are arranged below the support plate in sequence, the support plate legs are installed on the transformer iron yoke, and the voltage regulating switch, the support plate and its legs are between the box cover and the transformer iron yoke.

[0005] The connection relationship between the components of the voltage regulating switch remains unchanged, the connection relationship between the voltage regulating switch and the outside remains unchanged, and the function realized by the voltage regulating switch remains unchanged. The unchanged means the same as the prior art.

[0006] Compared with the prior art, the present invention embeds the voltage regulating switch in the oil tank of the transformer as a whole, that is, the motor drive system and the groove wheel mechanism are also placed in the oil tank. The positive effects are: eliminating the sealing problem at the connection between the two parts; at the same time, there is no need to open a hole in the transformer cover, avoiding the disadvantages caused by the opening, and bringing convenience to the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention is further described below in conjunction with the accompanying drawings.

[0008] Figure 1 It is a schematic diagram of the present invention.

[0009] Figure 2 yes Figure 1 Enlarged view of the medium voltage switch, support plate and its legs. DETAILED DESCRIPTION

[0010] The voltage regulating switch 2 is composed of a motor drive system 21, a groove wheel mechanism 22 and a connecting rod 23 as a transmission mechanism, a switching assembly 25 and a static contact plate assembly 24. The voltage regulating switch 2 is installed on the upper surface of a horizontal support plate 4. Below the support plate 4 are the support plate legs 41 and the transformer iron yoke 3 in sequence. The support plate legs 41 are installed on the transformer iron yoke. The voltage regulating switch 22, the support plate 4 and its legs 41 are between the transformer box cover 1 and the transformer iron yoke 3. The support plate 4 and its legs 41 can be integrated or split. The support plate 4 and its legs 41 in this embodiment are split, that is, the legs are installed on the lower surface of the support plate 4.

[0011] The voltage regulating switch 2, the support plate 4 and its legs 41 are integrally buried in the oil tank of the transformer, eliminating the sealing problem at the connection; at the same time, there is no need to open a hole in the transformer cover, avoiding the disadvantages caused by the opening and bringing convenience to the installation.

Claims

1. An on-load voltage regulating device integrally embedded in a transformer oil tank, comprising a voltage regulating switch and a support plate composed of a motor drive system, a transmission mechanism, a switching assembly, and a static contact plate assembly, wherein the transformer oil tank comprises a tank cover and a transformer iron yoke, and is characterized in that: The voltage regulating switch is installed on the upper surface of the horizontal support plate, and the support plate legs and the transformer yoke are arranged below the support plate in sequence. The support plate legs are installed on the transformer yoke, and the voltage regulating switch, the support plate and its legs are between the box cover and the transformer yoke.

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