Subway auxiliary air supply unit with automatic drainage function

Abstract

The utility model discloses an auxiliary air supply unit with an automatic drainage function for a subway, which is characterized in that after a workbench supplies power to the auxiliary air supply unit, an oil-free compressor driven by a direct-current motor starts to suck air from the outside through an air filter, and the sucked air is processed by the oil-free compressor and then conveyed into a cooler through a high-pressure hose; meanwhile, a safety valve is additionally arranged in a channel of the cooler to prevent the system from being damaged due to the fact that the system pressure is increased too high; the cooler is connected with a fine filter, and a drainage electromagnetic valve is mounted below the fine filter; the compressed air treated by the cooler passes through the fine filter, particle dust and macromolecular water in the compressed air are filtered by the fine filter, the filtered sewage is accumulated in a filter cup of the fine filter, and a drainage electromagnetic valve mounted below the fine filter is opened to discharge the sewage so as to prevent the sewage from being accumulated too much to cause failure of the fine filter.

Description

TECHNICAL FIELD

[0001] The utility model relates to an auxiliary air supply unit for subway design field, specifically speaking, an auxiliary air supply unit for subway with automatic drainage function. BACKGROUND

[0002] Since the reform and opening up, the urban economy of our country develops unceasingly quicken, at this time, developing efficient, convenient transportation system is the primary goal of urban development, and developing diversified urban traffic is urgent. Under this background, the subway, a new type of transportation, gradually becomes the focus of urban traffic construction.

[0003] Many cities in China are now speeding up the construction of railways, and with the success of subway construction in these cities, the total subway mileage in China will be further improved. In particular, in order to promote the sustainable development of China's transportation construction, on the basis of protecting the environment, saving urban land and resources, it is more necessary to develop subway transportation, so it is believed that with the development of cities in China, there is still great development space for domestic urban subway construction in the future, and it will inevitably become an indispensable transportation mode in future urban development.

[0004] An auxiliary air supply unit is needed in the process of subway operation to provide clean and clean compressed air for subway vehicle bow system, braking system and main short circuit system, etc. to ensure the stable and reliable operation of subway vehicle, which is a powerful guarantee for the reliable operation of subway vehicle and an indispensable part of subway vehicle.

[0005] At present, the fine filter of the auxiliary air supply unit used on the domestic direct current transmission subway vehicle will store sewage in the filter cup during the working process, which needs to be discharged regularly by artificial. If it is not treated within the time, the sewage in the filter cup may be full, which will cause the filter to lose the filtering function. This not only improves the maintenance difficulty of the equipment, but also reduces the reliability of the equipment. INVENTION CONTENTS

[0006] The utility model discloses in view of the technical defects of the above-mentioned auxiliary air supply unit "fine filter water storage needs manual discharge, the cooling device is closed in the casing, resulting in the poor cooling effect of the cooling device, the air supply unit with maintenance door has the risk of falling off the maintenance door in the work, and even the whole air supply unit also has a certain falling risk", and discloses an auxiliary air supply unit for subway with automatic drainage function. The fine filter of the auxiliary air supply unit is provided with an electromagnetic drain valve to realize automatic drainage. In addition, the cooling device channel of the auxiliary air supply unit is arranged outside the shell, which can fully utilize natural wind to assist cooling, and greatly improves the cooling effect of the cooling device.

[0007] The utility model is realized as follows:

[0008] The utility model discloses a kind of auxiliary air supply units with automatic drainage function for subway, the unit includes casing, cooler, safety valve, high-pressure hose, air filter, oil-free compressor, pressure switch, check valve, test connector, fine filter, drainage solenoid valve;The air filter, oil-free compressor, high-pressure hose, cooler are sequentially connected, when workbench powers auxiliary air supply unit, oil-free compressor driven by direct current motor starts to inhale from outside through air filter, and the air inhaled is sent into cooler by high-pressure hose after being processed by oil-free compressor;Cooler cools compressed air, and safety valve is additionally installed in the passage of cooler to prevent system damage caused by excessively high system pressure;The cooler is connected with fine filter, and drainage solenoid valve is installed below fine filter;Compressed air treated by cooler passes through fine filter again, fine filter filters particle dust and macromolecular water in compressed air, and the filtered sewage is stored in the filter cup of fine filter, and drainage solenoid valve installed below fine filter is opened to discharge to prevent sewage from accumulating too much and causing fine filter to fail.

[0009] Further, the air filter, oil-free compressor, cooler, safety valve, fine filter, drainage solenoid valve, check valve, test connector, and pressure switch are integrated in the same casing.

[0010] Further, the casing is provided with a door, which is connected to the casing by a hook, and when the door is closed, it is locked by a 7x7 quadrangular lock to prevent loosening, and safety pins are arranged at both ends of the door to prevent the door from falling off after unhooking due to vibration.

[0011] Further, safety ropes are additionally arranged at both sides of the casing, one end of each safety rope is connected to the casing, and the other end is connected to the machine body on which the auxiliary air supply unit is installed by a safety rope mounting plate.

[0012] Further, the fine filter is sequentially connected to a check valve, a test connector, and a pressure switch; compressed air treated by the fine filter is supplied to the outside by a unit exhaust connector after passing through the check valve, test connector, and pressure switch, wherein the check valve functions as a non-return valve to prevent backflow of compressed air and air leakage, the pressure switch controls the working range of the auxiliary air supply unit, and the test connector provides an access for an inspector.

[0013] The utility model has the advantages of the prior art in that:

[0014] 1. The fine filter of the auxiliary air supply unit uses an electromagnetic drainage valve to automatically drain water;

[0015] 2. The auxiliary air supply unit places the cooler passage outside the shell, which can fully utilize natural wind to assist cooling and greatly improve the cooling effect of the cooler;

[0016] 3. The auxiliary air supply unit as a whole is provided with a safety rope to prevent the auxiliary air supply unit as a whole from falling. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the auxiliary air supply unit with automatic drainage function for subway.

[0018] Wherein, 1-drainage electromagnetic valve, 2-one-way valve, 3-fine filter, 4-cooler, 5-safety valve, 6-high pressure hose, 7-air filter, 8-oil-free compressor, 9-casing, 10-anti-off rope, 11-pressure switch, 12-test connector. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and effect of the utility model more clear, explicit, the following examples are used to further explain the utility model. It should be pointed out that the specific implementation described here is only used to explain the utility model, and is not used to limit the utility model.

[0020] As Figure 1 shown, the utility model discloses an auxiliary air supply unit with automatic drainage function for subway, including casing 9, anti-off rope 10, cooler 4, safety valve 5, high pressure hose 6, air filter 7, oil-free compressor 8, pressure switch 11, one-way valve 2, test connector 12, fine filter 3, drainage electromagnetic valve 1.

[0021] The electric connector plug is inserted into the electric connector socket after the auxiliary air supply unit is installed and connected electrically, and the power supply of the plug is controlled by the workbench. When the workbench supplies power to the auxiliary air supply unit, the oil-free compressor 8 driven by the direct current motor starts to inhale air from the outside through the air filter 7, and the inhaled air is treated by the oil-free compressor 8 and then delivered into the cooler 4 through the high pressure hose 6. The cooler 4 cools the compressed air, and at the same time, the safety valve 5 is installed in the passage of the cooler 4 to prevent the system from being damaged due to the excessive increase of system pressure. The compressed air treated by the cooler 4 passes through the fine filter 3, which filters the particles and dust in the compressed air and large molecular water, and the filtered sewage is stored in the filter cup of the fine filter 3, and then the drainage electromagnetic valve 1 installed below the fine filter 3 is opened manually to discharge the sewage to prevent the fine filter 3 from failing due to excessive accumulation of sewage.

[0022] The compressed air treated by the fine filter 3 is supplied to the outside through the one-way valve 2, the test joint 12 and the pressure switch 11, wherein the one-way valve 2 can effectively prevent the compressed air from flowing back to cause the air running, the pressure switch 11 can control the working range of the auxiliary air supply unit, and the test joint 12 can provide an access for the inspector. The air filter 7, the oil-free compressor 8, the cooler 4, the safety valve 5, the fine filter 3, the drain electromagnetic valve 1, the one-way valve 2, the test joint 12 and the pressure switch 11 are integrated in the same casing 9.

[0023] The casing 9 is provided with a machine door which is connected to the casing 9 through a hook, when the machine door is closed, a 7x7 four-corner lock can be used to lock the machine door to prevent the machine door from loosening, and safety pins are arranged at both ends of the machine door, and the safety pins can be used to block the flaps on both sides of the machine door to achieve secondary anti-dropping, so that the machine door is prevented from falling due to unhooking caused by vibration. The auxiliary air supply unit is further provided with safety ropes 10 on both sides of the casing 9, one end of each safety rope 10 is connected to the casing 9, and the other end of each safety rope 10 is connected to the machine body on which the auxiliary air supply unit is installed through a safety rope mounting plate, so that the auxiliary air supply unit is prevented from falling due to the fracture of the hoisting bolts of the auxiliary air supply unit, and the safety of the whole is improved.

[0024] The auxiliary air supply unit adopts a piston type air compressor and an integrated technology of various components, has a small volume, is convenient to operate and maintain, and can provide clean compressed air for the pantograph system, the braking system and the main short circuit device of the subway vehicle. The auxiliary air supply unit is suitable for the subway vehicle, and can also be used on electric locomotives and intercity trains.

[0025] 1. The auxiliary air supply unit is provided with a drain electromagnetic valve below the fine filter.

[0026] 2. The casing of the auxiliary air supply unit is provided with a window on the left side surface for exposing the cooler. The cooler is installed from the inside, and the main body of the cooler is stretched out of the window, but the mounting plate, the air inlet, the air outlet and the safety valve mounting seat of the cooler are arranged in the casing, so that the air path is less affected by the outside during operation, and the cooling effect of the cooler is good.

[0027] 3. The auxiliary air supply unit is provided with the structure of the safety pins and the safety ropes during design.

[0028] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements can be made without departing from the principle of the utility model, and these improvements should also be regarded as the protection range of the utility model.

Claims

1. A subway auxiliary air supply unit with an automatic drainage function, characterized by, The unit comprises a casing (9), a cooler (4), a safety valve (5), a high-pressure hose (6), an air filter (7), an oil-free compressor (8), a pressure switch (11), a one-way valve (2), a test joint (12), a fine filter (3), and a drain electromagnetic valve (1); The air filter (7), the oil-free compressor (8), the high-pressure hose (6), and the cooler (4) are sequentially connected, and when the workbench supplies power to the auxiliary air supply unit, the oil-free compressor (8) driven by the direct-current motor starts to inhale air from the outside through the air filter (7), the inhaled air is treated by the oil-free compressor (8) and then delivered into the cooler (4) through the high-pressure hose (6), and the cooler (4) cools the compressed air. The cooler (4) is connected to the fine filter (3), and the drain electromagnetic valve (1) is installed below the fine filter (3); the compressed air treated by the cooler (4) passes through the fine filter (3) again, the fine filter (3) filters the particles and dust in the compressed air and large molecules of water, the filtered sewage is stored in the filter cup of the fine filter (3), and the drain electromagnetic valve (1) installed below the fine filter (3) is opened to discharge the sewage, so that the fine filter (3) is prevented from being disabled due to excessive accumulation of sewage.

2. The auxiliary air supply unit for a subway with an automatic drainage function according to claim 1, characterized by, The air filter (7), the oil-free compressor (8), the cooler (4), the safety valve (5), the fine filter (3), the drain electromagnetic valve (1), the one-way valve (2), the test joint (12), and the pressure switch (11) are integrated in the same casing (9).

3. The auxiliary air supply unit for a subway with an automatic drainage function according to claim 1, characterized in that, The casing (9) is provided with a machine door, the machine door is connected to the casing (9) through a hook, when the machine door is closed, a 7x7 four-corner lock is used to lock the machine door to prevent the machine door from loosening, and safety pins are arranged at both ends of the machine door.

4. The auxiliary air supply unit for a subway with an automatic drainage function according to claim 1, characterized in that, Safety ropes (10) are additionally arranged on both sides of the casing (9), one end of the safety rope (10) is connected to the casing, and the other end is connected to a machine body on which the auxiliary air supply unit is installed through a safety rope mounting plate.

5. The auxiliary air supply unit for a subway with an automatic drainage function according to claim 1, characterized in that, A safety valve (5) is additionally arranged in a passage of the cooler (4), and the safety valve (5) is used to prevent the system from being damaged due to excessively high system pressure.

6. The auxiliary air supply unit for a subway with an automatic drainage function according to claim 1, characterized in that, The fine filter (3) is sequentially connected to the one-way valve (2), the test joint (12), and the pressure switch (11); The compressed air treated by the fine filter (3) is supplied to the outside through a unit exhaust joint after passing through the one-way valve (2), the test joint (12), and the pressure switch (11), the one-way valve (2) functions as a check valve to prevent the compressed air from flowing backward and causing air leakage, the pressure switch (11) controls the working range of the auxiliary air supply unit, and the test joint (12) provides an access for an inspector.

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