Automatic control device for light-load starting of electric locomotive air pump

Abstract

The utility model belongs to underground shovel truck technical field, especially is involved in a kind of electric locomotive air pump light load starting automatic control device, it is characterized in that, setting up one branch variable-diameter tee valve on pipeline between air compressor and back pressure check valve of electric locomotive, the horizontal two pass of this variable-diameter tee valve is directly connected with air compressor and back pressure check valve, the vertical downward pipe head of variable-diameter tee valve is equipped with one two-position two normally closed electromagnetic air valve 2CC.The electric locomotive air pump light load starting automatic control device of the utility model effectively reduces equipment repair rate 30%, prolongs the service life of motor, reduces cost consumption and repair labor intensity, saves cost, improves work efficiency, and it has very important significance to reduce cost and increase efficiency and improve repair efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of underground shovel and loader technology, and in particular relates to an automatic control device for light-load start-up of an electric locomotive air pump. Background Technology

[0002] Electric locomotives are currently an advanced transportation equipment used in mines, widely applied in open-pit mines and large-scale infrastructure projects both domestically and internationally. Their primary function is transporting ore and rock in large open-pit mines. The proper operation of electric locomotives directly impacts mine production. Based on operational analysis over several years, the D15 type drive motor for the air compressor on the ZG150 electric locomotive has a high failure rate, and motor malfunctions are difficult to handle on-site. Intermittent operation and load-bearing starts are common problems. High-pressure gas is initially present in the compressor's piston chamber, cylinder head, and outlet pipe, causing the compressor to start under load. When the pressure in the air tank decreases and the compressor restarts, the high-pressure gas in the high-pressure chamber hinders normal compressor operation and increases the load on the compressor crankshaft. Frequent starts under load over a long period can lead to increased temperature and reduced insulation in the air compressor drive motor, eventually causing it to burn out. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic control device for the light-load starting of the air compressor in an electric locomotive, which enables the air compressor to start under light load and low load, prevents the air pump motor from burning out due to excessive starting load, and improves the working efficiency of the electric locomotive.

[0004] The objective of this utility model is achieved through the following technical solution: The present invention relates to an automatic control device for light-load starting of an air pump in an electric locomotive, characterized in that a reducing three-way valve is installed on the pipeline between the air compressor and the back pressure check valve of the electric locomotive. The two horizontal ports of this reducing three-way valve are directly connected to the air compressor and the back pressure check valve. A two-position normally closed solenoid valve 2CC is installed on the vertically downward pipe end of the reducing three-way valve.

[0005] The circuit of the normally closed solenoid valve 2CC is connected to the circuit of the cylinder pressure regulator, which is located in the control circuit of the air compressor.

[0006] Advantages of this utility model: This utility model's automatic control device for light-load starting of an electric locomotive air pump effectively reduces the equipment repair rate by 30%, extends the service life of the motor, reduces cost consumption and maintenance labor intensity, saves costs, and improves work efficiency. It is of great significance for cost reduction, efficiency improvement, and maintenance efficiency. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model.

[0008] Figure 2 This is the electrical control diagram of this utility model. Detailed Implementation

[0009] The specific embodiments of this utility model are further described below with reference to the accompanying drawings.

[0010] like Figure 1 , 2 As shown, the automatic control device for light-load start of the air pump of the electric locomotive of this utility model is characterized in that a reducing three-way valve is installed on the pipeline between the air compressor 1 and the back pressure check valve 2 of the electric locomotive. The two horizontal ports of this reducing three-way valve are directly connected to the air compressor 1 and the back pressure check valve 2. A two-position normally closed solenoid valve 2CC is installed on the vertically downward pipe end of the reducing three-way valve.

[0011] The circuit of the normally closed solenoid valve 2CC is connected to the circuit of the cylinder pressure regulator 3, and the circuit of the cylinder pressure regulator 3 is set in the control circuit of the air compressor 1.

[0012] This utility model relates to an automatic control device for the light-load starting of an electric locomotive air pump. To address the problem of starting a piston-type air compressor under load, the solution involves adding a reducing three-way valve to the pipeline between the air compressor 1 and the back pressure check valve 2. The two horizontal ports of this reducing three-way valve are directly connected to both the air compressor and the back pressure check valve. A two-position, normally closed, two-position solenoid valve 2CC is added to the vertically downward-facing pipe end. See attached diagram for details. Figure 1 Diagram showing the connection of the gas circuit modification.

[0013] When the air compressor 1 start motor starts, see the appendix for details. Figure 2 The electrical control diagram shows that the normally closed solenoid valve 2CC is de-energized, remaining closed, allowing air compressor 1 to normally generate high-pressure air. When the high-pressure air reaches 8.5 kgf / cm², the cylinder pressure regulator activates, de-energizing the air compressor 1 motor and stopping it. Simultaneously, the normally closed solenoid valve 2CC is energized, stopping the air compressor 1 motor and placing it in the normally open position, releasing the high-pressure gas between air compressor 1 and back pressure check valve 2. When the gas pressure in the storage tank drops below 6.5 kgf / cm², the cylinder pressure regulator 3 contacts activate, de-energizing the normally closed solenoid valve 2CC, keeping it closed, and energizing the air compressor 1 motor to start, driving air compressor 1 to rotate. This cycle repeats continuously, effectively solving the problem of easy motor burnout when starting a piston air compressor under load.

[0014] This utility model's automatic control device for light-load starting of an electric locomotive air pump effectively reduces the equipment repair rate by 30%, extends the service life of the motor, reduces cost consumption and maintenance labor intensity, saves costs, and improves work efficiency. It is of great significance for cost reduction, efficiency improvement, and maintenance efficiency.

Claims

1. An automatic control device for light-load starting of an air pump in an electric locomotive, characterized in that, A reducing three-way valve is installed on the pipeline between the air compressor and the back pressure check valve of the electric locomotive. The two horizontal ports of this reducing three-way valve are directly connected to the air compressor and the back pressure check valve. A two-position normally closed solenoid valve 2CC is installed on the vertically downward pipe end of the reducing three-way valve.

2. The automatic control device for light-load starting of a gas pump of an electric locomotive according to claim 1, wherein The circuit of the normally closed solenoid valve 2CC is connected to the circuit of the cylinder pressure regulator, which is located in the control circuit of the air compressor.

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