Ice-melting and snow-removing hot water pressurizing device for motor train unit

Abstract

The utility model belongs to the field of ice melting and snow removing of high-speed railway motor train bogies, and particularly relates to an ice melting and snow removing hot water pressurizing device for a motor train unit. The utility model aims to solve the problems that the ice-melting and snow-removing operation conditions of the existing bogie of the motor train unit are limited, the working efficiency is low, the labor intensity is high, and the operation time is difficult to guarantee. The device consists of a water supply system, a heat source unit, a secondary pressurizing device and a handheld spray gun, the water supply system is composed of a water tank, a circulating booster pump, a plate heat exchanger, an electromagnetic valve and a filtering device. The heat source unit is composed of a make-up pump, a water softening device, a surge tank, a circulating pump and an electric heating plate type heat exchanger. The secondary pressurizing device is composed of a plunger pump, a second pressure sensor and a second valve, and the secondary pressurizing device is connected with the handheld spray gun through a high-pressure hose and a quick connector. The ice melting and snow removing device is used for ice melting and snow removing operation of the motor train unit bogie.

Description

Technical Field

[0001] This utility model belongs to the field of ice melting and snow removal for high-speed railway EMU bogies, specifically relating to a hot water pressurization device for ice melting and snow removal of EMUs. Background Technology

[0002] During winter snowy weather, high-speed trains are highly susceptible to carrying snow from the tracks under their carriages, causing snow or ice to accumulate on the bottom of the bogies and at the car body connection points. Icing can lead to brake failure, reduced shock absorption, and vehicle damage. This is especially true during the transitional period between winter and early winter, when severe icing on the bogies poses a serious threat to the operational safety of high-speed trains. Currently, the most common method for de-icing and snow removal on high-speed train bogies is using mobile high-pressure washers. However, these washers have limitations: they require connection to a water or power source, and the operating distance is limited by pipeline length. Often, after cleaning several adjacent bogies, the washer needs to be moved and the water and power connections reconnected, leading to frequent reconnections and increased workload due to the distance between water and power interfaces. Furthermore, the large number of high-pressure washers and water / power interfaces required means that the washers cannot be used when these interfaces are occupied, severely impacting work efficiency. Additionally, the high-pressure washers rely on manual transport, and their weight and long transport routes increase the labor intensity of snow removal, reduce efficiency, and make it difficult to guarantee the minimum one-hour snow removal time, thus affecting the maintenance and repair of high-speed trains. Utility Model Content

[0003] The purpose of this invention is to provide a hot water pressurization device for de-icing and snow removal on high-speed trains. This addresses the problems of limited working conditions, low efficiency, high labor intensity, and difficulty in guaranteeing the duration of existing de-icing and snow removal operations on high-speed train bogies.

[0004] This utility model discloses a hot water pressurization device for de-icing and snow removal on high-speed trains, comprising a water supply system, a heat source unit, a secondary pressurization device, and a handheld spray gun. The water supply system consists of a water tank, a circulating booster pump, a plate heat exchanger, a solenoid valve, and a filter device. The heat source unit consists of a makeup water pump, a water softening device, a pressure stabilizing tank, a circulating pump, and an electrically heated plate heat exchanger. The secondary pressurization device consists of a plunger pump, a second pressure sensor, and a second valve. The secondary pressurization device is connected to the handheld spray gun via a high-pressure hose and a quick-connect fitting. The water supply system... The system connects to a municipal water source, which is then pressure-stabilized in a water tank and divided into two streams. One stream passes through a circulating booster pump, the cold-side inlet of a plate heat exchanger, the cold-side outlet of a plate heat exchanger, and a filter before connecting to a secondary pressurization device. Its return water is regulated by a solenoid valve and then enters the water tank. The other stream connects to the water supply pipeline of the heat source unit, passes through a makeup water pump and a softening water device, and then enters a pressure stabilizing tank. The water from the pressure stabilizing tank is heated and pressurized by a circulating pump and an electrically heated plate heat exchanger, and then passes through the hot-side inlet and hot-side outlet of the plate heat exchanger before being connected to the pressure stabilizing tank via a return water pipeline.

[0005] The beneficial effects of this utility model are:

[0006] This invention employs a heat source unit and a secondary pressurization device to provide real-time pressurization and heat exchange for the system's water supply, resulting in high outlet water temperature, stable pressure, and high efficiency in ice melting and snow removal. The secondary pressurization device is located below the maintenance depot's track bridge, without occupying vehicle maintenance space. The handheld spray gun is easy to insert and remove, and simple to operate, significantly reducing manual snow removal workload. Each system has comprehensive self-diagnostic functions and safety protection devices, ensuring safe and reliable operation. Attached Figure Description

[0007] Figure 1 A schematic diagram of the hot water pressurization device for de-icing and snow removal on high-speed trains. Detailed Implementation

[0008] The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

[0009] Specific Implementation Method 1: This implementation method is described in conjunction with the accompanying drawings. The hot water pressurization device for snow melting and de-icing on high-speed trains in this implementation method consists of a water supply system, a heat source unit, a secondary pressurization device, and a handheld spray gun. The water supply system consists of a water tank 1, a circulating booster pump 2, a plate heat exchanger 3, a solenoid valve 5, and a filter device 4. The heat source unit consists of a makeup water pump 6, a water softening device 7, a pressure stabilizing tank 8, a circulating pump 9, and an electrically heated plate heat exchanger 10. The secondary pressurization device consists of a plunger pump 20, a second pressure sensor 21, and a second valve 19. The secondary pressurization device is connected to the handheld spray gun via a high-pressure hose and a quick-connect fitting. The spray gun; the water supply system is connected to a tap water source. The tap water source is divided into two paths after being stabilized and pressure-transferred by water tank 1. One path passes through circulating booster pump 2, the cold side inlet of plate heat exchanger 3, the cold side outlet of plate heat exchanger 3, and filter device 4, and then connects to the secondary pressurization device. Its return water is regulated by solenoid valve 5 and then enters water tank 1. The other path is connected to the water supply pipeline of the heat source unit, and enters the pressure stabilizing tank 8 through water replenishment pump 6 and water softening device 7. The water from pressure stabilizing tank 8 is heated and pressurized by circulating pump 9 and electric heating plate heat exchanger 10, and then connects to pressure stabilizing tank 8 through the hot side inlet and hot side outlet of plate heat exchanger 3 via return water pipeline.

[0010] In this embodiment, the water supply system utilizes heat from a heat source to heat the pressurized system water to 50-70°C in real time via a plate heat exchanger. This water is then delivered to the secondary pressurization unit through supply pipes and control valves, providing sufficient pressure and flow for the unit. The water tank capacity meets the water supply requirements of the secondary pressurization unit and is equipped with a level sensor for automatic water replenishment. The plate heat exchanger is a high-efficiency, compact design with a design pressure PN = 1.6 MPa and supply / return water temperatures of 10-15°C / 50-70°C, enabling one-time real-time heat exchange to provide sufficient warm water for the secondary pressurization unit. The circulating booster pump is a multi-stage vertical pump with variable frequency control, matched one-to-one with the inverter to achieve constant pressure water supply. A cast steel Y-type strainer is installed before the pump, equipped with a drain valve. A solenoid valve is installed at the end of the system. When the solenoid valve is opened, the water at the end can return to the water tank to achieve circulation, which heats the system and avoids the waste of initial water resources. When the secondary pressurization device is working, the solenoid valve automatically closes to achieve constant pressure water supply.

[0011] The hot water pressurization device for de-icing and snow removal in this embodiment of the EMU also includes safety protection measures such as leakage protection, water shortage protection, over-temperature protection, and antifreeze protection.

[0012] This implementation method also enables system self-testing, equipment operation status detection, water temperature and pressure detection, system alarm, and alarm information display through electrical signal control. The system automatically controls the operation of the system based on the outlet water temperature to ensure a constant outlet water temperature.

[0013] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the water supply outlet of the water tank 1 is equipped with a Y-type dirt separator, and the Y-type dirt separator is equipped with a drain valve. Everything else is the same as in Specific Implementation Method One.

[0014] Specific Implementation Method 3: This implementation method differs from Specific Implementation Method 1 in that the cold-side outlet of the plate heat exchanger 3 is equipped with a first temperature transmitter 17 and a first pressure sensor 18. Everything else is the same as in Specific Implementation Method 1.

[0015] Specific Implementation Method Four: This implementation method differs from Specific Implementation Method One in that the outlet of the electric heating plate heat exchanger 10 is sequentially equipped with a second temperature transmitter 11, a third pressure sensor 12, an exhaust valve 13, a safety valve 14, an overpressure relief valve 15, and an electric temperature three-way regulating valve 16. Everything else is the same as in Specific Implementation Method One.

[0016] Specific Implementation Method Five: This implementation method differs from Specific Implementation Method Four in that the exhaust valve 13 is located at the highest point of the pipeline, and a first valve 23 is provided below the exhaust valve 13. Everything else is the same as in Specific Implementation Method Four.

[0017] Specific Implementation Method Six: This implementation method differs from Specific Implementation Method Four in that the safety valve 14 and the overpressure relief valve 15 are both connected upstream to the electric heating plate heat exchanger 10, and downstream to the water tank 1. Everything else is the same as in Specific Implementation Method Four.

[0018] In this embodiment, the safety valve and the overpressure relief valve work together to prevent the water pump from exceeding the pressure limit during operation.

[0019] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Method Four in that the normally open portion of the electric temperature three-way regulating valve 16 is connected to the hot-side inlet of the plate heat exchanger 3. Everything else is the same as in Specific Implementation Method Four.

[0020] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Method Four in that the normally closed port of the electric temperature three-way regulating valve 16 is connected to the return water pipeline. Everything else is the same as in Specific Implementation Method Four.

[0021] In this embodiment, the electric temperature three-way regulating valve controls the valve opening size according to the change in the outlet water temperature of the plate heat exchanger through a pre-set program in the control system, thereby ensuring the hot water temperature of the water supply system.

[0022] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Method One in that there are multiple secondary pressurization devices. Everything else is the same as in Specific Implementation Method One.

[0023] In this embodiment, multiple secondary pressurization devices are used, each capable of de-icing several adjacent bogies. The number and placement are determined based on the trainset's requirements. Each secondary pressurization device is connected to the water supply system. A plunger pump pressurizes the low-pressure warm water supplied by the system and inputs it into a handheld spray gun. The handheld spray gun is connected via a quick-connect coupling, and the plunger pump is controlled to start and stop via a pressure switch. Multiple handheld spray guns are used, corresponding to the secondary pressurization devices. One end of a high-pressure hose is connected to the plunger pump, and the other end to the spray gun. Pulling the spray gun trigger starts the plunger pump, and releasing the trigger stops it, thus achieving the de-icing and snow removal operation.

Claims

1. A hot water pressurization device for de-icing and snow removal on high-speed trains, characterized in that... The hot water pressurization device for de-icing and snow removal on high-speed trains consists of a water supply system, a heat source unit, a secondary pressurization device, and a handheld spray gun. The water supply system consists of a water tank (1), a circulating booster pump (2), a plate heat exchanger (3), a solenoid valve (5), and a filter device (4). The heat source unit consists of a makeup water pump (6), a water softening device (7), a pressure stabilizing tank (8), a circulating pump (9), and an electrically heated plate heat exchanger (10). The secondary pressurization device consists of a plunger pump (20), a second pressure sensor (21), and a second valve (19). The secondary pressurization device is connected to the handheld spray gun via a high-pressure hose and a quick-connect fitting. The water supply system is connected to a tap water source. The tap water source is divided into two paths after being stabilized and pressure-transferred by the water tank (1). One path passes through the circulating booster pump (2), the cold side inlet of the plate heat exchanger (3), the cold side outlet of the plate heat exchanger (3), and the filter device (4) before connecting to the secondary pressurization device. Its return water is regulated by the solenoid valve (5) and then connected to the water tank (1). The other path is connected to the water supply pipeline of the heat source unit, and passes through the water replenishment pump (6) and the water softening device (7) before being connected to the pressure stabilizing tank (8). The water outlet of the pressure stabilizing tank (8) is heated and pressurized by the circulating pump (9) and the electric heating plate heat exchanger (10), and then passes through the hot side inlet of the plate heat exchanger (3) and the hot side outlet of the plate heat exchanger (3) before being connected to the pressure stabilizing tank (8) through the return water pipeline.

2. The hot water pressurization device for de-icing and snow removal on high-speed trains according to claim 1, characterized in that... The water tank (1) is equipped with a Y-type dirt separator (22) at its water supply outlet, and the Y-type dirt separator (22) is equipped with a drain valve.

3. The hot water pressurization device for de-icing and snow removal on high-speed trains according to claim 1, characterized in that... The cold side outlet of the plate heat exchanger (3) is equipped with a first temperature transmitter (17) and a first pressure sensor (18).

4. The hot water pressurization device for de-icing and snow removal on high-speed trains according to claim 1, characterized in that... The outlet of the electric heating plate heat exchanger (10) is provided with a second temperature transmitter (11), a third pressure sensor (12), an exhaust valve (13), a safety valve (14), an overpressure relief valve (15), and an electric temperature three-way regulating valve (16) in sequence.

5. A hot water pressurization device for melting ice and snow on a high-speed train according to claim 4, characterized in that... The exhaust valve (13) is located at the highest point of the pipeline, and a first valve (23) is provided below the exhaust valve (13).

6. A hot water pressurization device for de-icing and snow removal on a high-speed train according to claim 4, characterized in that... The safety valve (14) and the overpressure relief valve (15) are both connected to the electric heating plate heat exchanger (10) before their valves, and are both connected to the water tank (1) after their valves.

7. A hot water pressurization device for melting ice and snow on a high-speed train according to claim 4, characterized in that... The normally open end of the electric temperature three-way regulating valve (16) is connected to the hot side inlet of the plate heat exchanger (3).

8. A hot water pressurization device for de-icing and snow removal on a high-speed train according to claim 4, characterized in that... The normally closed port of the electric temperature three-way regulating valve (16) is connected to the return water pipeline.

9. A hot water pressurization device for de-icing and snow removal on a high-speed train according to claim 1, characterized in that... There are multiple secondary pressurization devices.

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