Multi-output small-size mining flame-proof instrument transformer

Abstract

The utility model provides a multi-output small volume mining flame-proof instrument transformer, including: transformer body and transformation subassembly, the transformer body is equipped with the transformation subassembly inside, the transformer body includes explosion-proof casing and flame-proof cover plate, the flame-proof cover plate is fixed at the upper end of explosion-proof casing through screw, the explosion-proof cover plate is fixed on the explosion-proof casing through screw, and the explosion-proof casing is fixed on the explosion-proof cover plate through screw. Compared with the prior art, the explosion-proof transformer has the following beneficial effects that the whole transformer body is convenient to carry and install by reducing the volume of the explosion-proof shell and the volume of the explosion-proof cover plate of the transformer body, optimizing the internal structure of the explosion-proof shell, saving space and controlling the volume of a product; according to the arrangement of the voltage transformation assembly, one primary coil and two secondary coils are arranged, so that one transformer body can output two paths at the same time, power can be supplied to two independent devices at the same time, and the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of instrument transformers, in particular to a small-volume explosion-proof instrument transformer for mining with multiple outputs. Background Art

[0002] During the coal mining process, the impact of coal mine safety accidents is very large, not only causing huge economic losses, but also endangering the lives of miners. Gas is the main cause of major disasters in coal mines. When the gas concentration reaches 5%-16%, it is very easy to explode when encountering open flames or electric sparks, endangering lives.

[0003] As a device used in coal mines, instrument transformers need to be explosion-proof. The power supply in coal mines is mostly 1140V and 127V, which cannot meet the needs of some monitoring equipment. An instrument transformer is needed to convert the voltage on site into a voltage suitable for monitoring equipment. We hope to develop a new structure of instrument transformer that can convert the voltage of 1140V into 660V, which can provide power to two independent devices at the same time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a small-volume explosion-proof instrument transformer for mining with multiple outputs, so as to solve the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical scheme: a small-volume explosion-proof instrument transformer for mining with multiple outputs, comprising: a transformer body and a transformer assembly, wherein the transformer body is equipped with a transformer assembly, and the transformer body comprises an explosion-proof housing and an explosion-proof cover plate;

[0006] The upper end of the explosion-proof housing is fixed with an explosion-proof cover plate by screws, an inner cavity is provided between the explosion-proof housing and the explosion-proof cover plate, and a control circuit is installed at the bottom of the inner cavity;

[0007] The transformer assembly comprises a primary coil and a secondary coil. The primary coil is installed inside the explosion-proof housing through a frame, and the secondary coil is installed inside the explosion-proof housing through a frame.

[0008] As a preferred embodiment, an external grounding terminal is provided on the lower side of the left surface of the explosion-proof shell, and the explosion-proof shell is connected to the earth through the external grounding terminal and the grounding wire. The setting of the external grounding terminal ensures that the transformer body will not be energized during normal use, thereby avoiding injury to people and damage to equipment. A flameproof surface is provided between the explosion-proof subject and the flameproof cover plate, and they are fixed together by multiple fastening bolts to achieve an explosion-proof design.

[0009] As a preferred embodiment, a lead-in piece is installed on the left surface of the explosion-proof housing, and a mounting foot is welded on the right surface of the explosion-proof housing.

[0010] As a preferred embodiment, the primary coil and the secondary coil are highly insulated from each other, two secondary coils are provided, and the two secondary coils are highly insulated from each other.

[0011] As a preferred embodiment, the primary coil and the two secondary coils are highly insulated from the remaining components inside the explosion-proof housing, and the primary coil and the two secondary coils are wound on the same skeleton, and the skeleton is formed of insulating material. The skeleton is sleeved on the iron core, and the iron core is formed of magnetic conductive material. In actual use, the input end of the transformer is 1140V, and the output end is two 660V, so that a transformer body can output two circuits at the same time, and can power two independent devices at the same time, saving costs.

[0012] As a preferred embodiment, a shell is installed outside the iron core, and pins are arranged on the outside of the shell. The pins are lead wires of the primary coil and the secondary coil inside the explosion-proof shell, and the pins are electrically connected to the external circuit.

[0013] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: by reducing the volume of the explosion-proof shell and the explosion-proof cover of the transformer body, optimizing the internal structure of the explosion-proof shell, saving space, and controlling the volume of the product, the entire transformer body is easy to carry and install, and according to the requirements of GB / T3836-2021 "Explosive Environment", the explosion-proof shell and the explosion-proof cover that meet the explosion-proof requirements are designed to meet the explosion-proof requirements, so that the transformer body can work in coal mines and explosive environments;

[0014] The setting of the transformer component, by setting a primary coil and two secondary coils, allows a transformer body to output two circuits at the same time, and can power two independent devices at the same time, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 The utility model is a schematic diagram of the overall structure of a small-volume explosion-proof instrument transformer for mining with multiple outputs.

[0017] Figure 2The utility model is a schematic diagram of the multi-channel output principle of a small-volume explosion-proof instrument transformer for mining with multi-channel output.

[0018] In the figure, 100-transformer body, 110-explosion-proof housing, 120-control circuit, 130-external grounding terminal, 140-introduction piece, 150-explosion-proof cover, 160-mounting foot, 170-inner cavity;

[0019] 200 - transformer assembly, 210 - primary coil, 220 - secondary coil. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 to Figure 2 The utility model provides a technical solution: a multi-channel output small-volume explosion-proof instrument transformer for mining, comprising: a transformer body 100 and a transformer assembly 200, wherein the transformer body 100 is internally installed with the transformer assembly 200, and the transformer body 100 comprises an explosion-proof housing 110 and an explosion-proof cover plate 150;

[0022] The upper end of the explosion-proof housing 110 is fixed with an explosion-proof cover plate 150 by screws, an inner cavity 170 is provided between the explosion-proof housing 110 and the explosion-proof cover plate 150, and a control circuit 120 is installed at the bottom of the inner cavity 170;

[0023] The transformer assembly 200 includes a primary coil 210 and a secondary coil 220 . The primary coil 210 is installed inside the explosion-proof housing 110 through a frame, and the secondary coil 220 is installed inside the explosion-proof housing 110 through a frame.

[0024] See also Figure 1 An external grounding terminal 130 is provided on the lower side of the left surface of the explosion-proof shell 110. The explosion-proof shell 110 is connected to the earth through the external grounding terminal 130 and the grounding wire. The setting of the external grounding terminal 130 ensures that the transformer body 100 will not be energized during normal use to avoid injury to people and damage to equipment. A flameproof surface is provided between the explosion-proof subject and the flameproof cover 150, which are fixed together by multiple fastening bolts to achieve an explosion-proof design.

[0025] An introduction piece 140 is installed on the left surface of the explosion-proof housing 110 , and a mounting foot 160 is welded on the right surface of the explosion-proof housing 110 .

[0026] As the first embodiment of the utility model, by reducing the volume of the explosion-proof shell 110 and the explosion-proof cover 150 of the transformer body 100, optimizing the internal structure of the explosion-proof shell 110, saving space, and controlling the volume of the product, the entire transformer body 100 is easy to carry and install, and according to the requirements of GB / T3836-2021 "Explosive Environment", the explosion-proof shell 110 and the explosion-proof cover 150 that meet the explosion-proof requirements are designed to meet the explosion-proof requirements, so that the transformer body 100 can work in coal mines and explosive environments.

[0027] See also Figure 1 to Figure 2 The primary coil 210 and the secondary coil 220 are highly insulated from each other. Two secondary coils 220 are provided, and the two secondary coils 220 are highly insulated from each other.

[0028] The primary coil 210 and the two secondary coils 220 are highly insulated from the other components inside the explosion-proof housing 110. The primary coil 210 and the two secondary coils 220 are all wound on the same frame, which is made of insulating material. The frame is sleeved on the iron core, which is made of magnetic conductive material. In actual use, the input end of the transformer is 1140V and the output end is two 660V circuits, so that one transformer body 100 can output two circuits at the same time, and can power two independent devices at the same time, saving costs.

[0029] A shell is installed outside the iron core, and pins are arranged on the outside of the shell. The pins are lead wires of the primary coil 210 and the secondary coil 220 inside the explosion-proof shell 110, and the pins are electrically connected to the external circuit.

[0030] As the second embodiment of the utility model, in actual application, a 1140V voltage is input to the input end of the transformer body 100. Under the action of the primary coil 210 and the two secondary coils 220, the 1140V voltage at the input end is output from the output end of the transformer body 100 as two 660V voltages. In this way, the transformer body 100 can be connected to two independent devices at the same time, so that one transformer body 100 can output two paths at the same time, and can power two independent devices at the same time, saving costs.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-output small-volume explosion-proof instrument transformer for mining, comprising: A transformer body (100) and a transformer assembly (200), characterized in that the transformer assembly (200) is installed inside the transformer body (100), and the transformer body (100) comprises an explosion-proof housing (110) and a flameproof cover plate (150); A flameproof cover plate (150) is fixed to the upper end of the flameproof housing (110) by means of screws, an inner cavity (170) is provided between the flameproof housing (110) and the flameproof cover plate (150), and a control circuit (120) is installed at the bottom of the inner cavity (170); The transformer assembly (200) comprises a primary coil (210) and a secondary coil (220); the primary coil (210) is installed inside the explosion-proof housing (110) via a frame, and the secondary coil (220) is installed inside the explosion-proof housing (110) via a frame; An external grounding terminal (130) is provided on the lower side of the left surface of the explosion-proof housing (110), and the explosion-proof housing (110) is connected to the earth via the external grounding terminal (130) and a grounding wire; The primary coil (210) and the secondary coil (220) are highly insulated from each other, two secondary coils (220) are provided, and the two secondary coils (220) are highly insulated from each other; The primary coil (210) and the two secondary coils (220) are highly insulated from other components inside the explosion-proof housing (110); the primary coil (210) and the two secondary coils (220) are wound on the same frame, the frame is formed of insulating material, the frame is sleeved on an iron core, and the iron core is formed of magnetic conductive material; A shell is installed outside the iron core, and pins are arranged outside the shell. The pins are lead wires of the primary coil (210) and the secondary coil (220) inside the explosion-proof housing (110), and the pins are electrically connected to the external circuit.

2. A multi-output small-volume explosion-proof instrument transformer for mining use as claimed in claim 1, characterized in that: An introduction piece (140) is installed on the left surface of the explosion-proof housing (110), and a mounting foot (160) is welded on the right surface of the explosion-proof housing (110).

Images