Auxiliary air supply device and railway vehicle

Abstract

The utility model discloses an auxiliary air supply device and a railway vehicle. The auxiliary air supply device comprises a first pipeline, a dryer, a regeneration gas storage unit used for storing dry gas, a second pipeline, a delay pressure relief device, a third pipeline and a pre-control electromagnetic valve. A compressed air outlet of the dryer is communicated with the first pipeline; a regeneration valve of the dryer is communicated with the regeneration gas storage unit through a second pipeline; the third pipeline comprises a main pipeline and two branch pipelines, the main pipeline of the third pipeline is communicated with a compressed air outlet of the dryer, and the two branch pipelines are used for respectively communicating the delay pressure relief device and a regeneration valve of the dryer with the main pipeline of the third pipeline; and the pre-control electromagnetic valve is arranged on a main pipeline of the third pipeline. The drying device can dry automatically and discharge moisture filtered by the molecular sieve in the dryer when not working, and the regeneration valve is closed automatically after drying to close all pipelines to isolate the atmosphere, so that the molecular sieve of the dryer is ensured to be in a dry state when needing to work so as to meet the air quality requirement of a railway vehicle.

Description

Technical Field

[0001] The utility model belongs to the field of auxiliary air supply devices, and in particular relates to an auxiliary air supply device and a rail vehicle. Background Art

[0002] The auxiliary air supply device is an essential component of the rail vehicle braking system. Its function is to raise the pantograph to obtain electrical energy. The auxiliary air supply device is only used to raise the pantograph. When the pantograph is raised, the main air supply device will work. Therefore, the auxiliary air supply device is rarely used and does not work for a long time.

[0003] The existing auxiliary air supply device cannot ensure that the molecular sieve inside the dryer is in a dry state when it is needed to work when it is not working for a long time, so as to meet the air quality requirements of the rail vehicle. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides an auxiliary air supply device and a rail vehicle.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] In a first aspect, an auxiliary air supply device is provided, comprising:

[0007] First pipeline;

[0008] A dryer having a compressed air outlet and a regeneration valve, wherein the compressed air outlet of the dryer is connected to the first pipeline;

[0009] A regenerative gas storage unit for storing dry gas;

[0010] A second pipeline connects the regeneration valve of the dryer to the regeneration gas storage unit;

[0011] Delayed pressure relief device;

[0012] The third pipeline includes a main pipeline and two branches, the main pipeline of the third pipeline is connected to the compressed air outlet of the dryer, and the two branches respectively connect the delayed pressure relief device and the regeneration valve of the dryer to the main pipeline of the third pipeline;

[0013] A pre-control solenoid valve is arranged on the main line of the third pipeline; and

[0014] When the auxiliary air supply device is in the dryer regeneration state, the pre-control solenoid valve is in the power-off state, the first pipeline and the delayed pressure relief device are both in the closed state, the regeneration valve of the dryer is in the open state due to the air pressure in the third pipeline, and the opening of the regeneration valve of the dryer has gas from the regeneration air storage unit through the second pipeline and the dryer.

[0015] In some embodiments, when the auxiliary air supply device is in a closed state, the pre-control solenoid valve is in a power-off state, the first pipeline is in a closed state, the delayed pressure relief device is in an open state, and the regeneration valve of the dryer is in a closed state because the gas in the third pipeline is discharged from the delayed pressure relief device.

[0016] In certain embodiments, when the auxiliary air supply device is in the air supply state, the pre-control solenoid valve is in the power-on state, the first pipeline and the delayed pressure relief device are both in the open state, the regeneration valve of the dryer is in the closed state, the branch of the third pipeline is in the closed state and the interior of its main pipeline has compressed gas that has passed through the first pipeline and been dried by the dryer.

[0017] In some embodiments, the delayed pressure relief device comprises:

[0018] a housing having a delayed air inlet and a delayed air outlet, the delayed air inlet being connected to a branch of the third pipeline and the delayed air outlet being connected to the atmosphere; and

[0019] The shrinkage plugging sealing gasket is arranged inside the shell and is located in the area between the delayed air inlet and the delayed air outlet of the shell. The outer periphery of the shrinkage plugging sealing gasket is sealed and connected to the inner wall of the shell.

[0020] In certain embodiments, the regeneration valve of the dryer comprises:

[0021] A valve body having a regeneration valve port at the bottom;

[0022] A valve plug, the main body of which is arranged inside the valve body and has a diameter smaller than the diameter of the inner wall of the valve body, the top of the valve plug has a first protrusion extending toward the outer periphery and the bottom of the valve plug has a second protrusion extending toward the outer periphery, the outer periphery of the first protrusion of the valve plug and the inner wall of the valve body form a sealed sliding structure; the area formed by the top wall of the valve plug and the inner wall of the valve body constitutes a pressure chamber of the regeneration valve, and the pressure chamber of the regeneration valve is connected to a branch of the third pipeline; and

[0023] The bottom of the valve plug passes through the regeneration valve port of the valve body. When the pressure in the pressure chamber of the regeneration valve is in a normal state, the top wall of the second protrusion of the valve plug is in close contact with the outer wall of the valve body, and the regeneration valve is in a closed state.

[0024] In some embodiments, the auxiliary air supply device further comprises:

[0025] A compressor having the same control circuit as the pre-control solenoid valve;

[0026] The fourth pipeline connects the air outlet of the compressor with the air inlet of the dryer. The fourth pipeline has a cooling pipe, and the cooling pipe is located in the area between the air outlet of the compressor and the air inlet of the dryer.

[0027] In some embodiments, the tail section of the first pipeline has a one-way valve and a safety valve, and the safety valve is located in the area between the one-way valve and the compressed air outlet of the dryer.

[0028] In some embodiments, the auxiliary air supply device further includes a mounting bracket, and the side plate and the bottom plate of the mounting bracket both have a plurality of hollow holes.

[0029] In a second aspect, a rail vehicle is provided, comprising: the auxiliary air supply device described above.

[0030] The beneficial effects of the utility model are as follows: the utility model can self-dry and discharge the moisture filtered by the molecular sieve in the dryer when not working, and automatically close the regeneration valve after drying is completed so that all pipelines are closed and isolated from the atmosphere, ensuring that the molecular sieve of the dryer is in a dry state when it is needed to work to meet the air quality requirements of rail vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 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.

[0032] Figure 1 A schematic diagram of the connection relationship of the auxiliary air supply device provided in one embodiment of the utility model;

[0033] Figure 2 This is a schematic structural diagram of an auxiliary air supply device provided in one embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the internal structure of the auxiliary air supply device in one embodiment of the utility model;

[0035] Figure 4 It is a schematic structural diagram of a regeneration valve and a delayed pressure relief device in one embodiment of the utility model. DETAILED DESCRIPTION

[0036] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the auxiliary air supply device includes: a first pipeline 10, a dryer 20, a regeneration gas storage unit 30 for storing dry gas, a second pipeline 40, a delayed pressure relief device 50, a third pipeline 60 and a pre-control solenoid valve 70.

[0038] like Figure 1As shown, in one embodiment, in order to ensure that the first pipeline 10 is in a closed state when the auxiliary air supply device is not working, the tail section of the first pipeline 10 has a one-way valve 101; in order to prevent the auxiliary air supply device from being difficult to close after losing control, the tail section of the first pipeline 10 also has a safety valve 102 and it is located in the area between the one-way valve and the compressed air outlet 201 of the dryer 20. In one embodiment, the one-way valve 101 is fixedly arranged inside the mounting bracket 100. In one embodiment, the housing of the safety valve 102 is fixedly connected to the housing of the one-way valve 101.

[0039] The dryer 20 has a compressed air outlet 201 and a regeneration valve 202. The compressed air outlet 201 of the dryer 20 is in communication with the first pipeline 10. In one embodiment, the dryer 20 is fixedly disposed inside the mounting bracket 100.

[0040] like Figure 1 As shown, in one embodiment, the regeneration valve 202 of the dryer 20 includes a valve body 2021 and a valve plug 2022. The bottom of the valve body 2021 has a regeneration valve port 2021a; the main body of the valve plug 2022 is arranged inside the valve body 2021 and its diameter is smaller than the diameter of the inner wall of the valve body 2021, the top of the valve plug 2022 has a first protrusion 2022a extending toward the periphery, and the bottom of the valve plug 2022 has a second protrusion 2022b extending toward the periphery. The outer periphery of the first protrusion 2022a of the valve plug 2022 forms a sealed sliding structure with the inner wall of the valve body 2021. The area formed by the top wall of the valve plug 2022 and the inner wall of the valve body 2021 constitutes a pressure chamber 2023 of the regeneration valve, and the pressure chamber 2023 of the regeneration valve is connected to the branch of the third pipeline 60; the bottom of the valve plug 2022 passes through the regeneration valve port 2021a of the valve body 2021.

[0041] Specifically, when the pressure in the pressure chamber 2023 of the regeneration valve is in a normal state, the top wall of the second protrusion 2022b of the valve plug 2022 of the regeneration valve is in airtight contact with the outer wall of the valve body 2021, and the regeneration valve 202 is in a closed state; when the pressure in the pressure chamber 2023 of the regeneration valve increases, downward pressure is applied to the top of the valve plug 2022, so that the position of the valve plug 2022 moves downward, and the bottom of the valve plug 2022 does not contact the outer wall of the valve body 2021, and the regeneration valve 202 opens, and the gas from the regeneration gas storage unit 30 is discharged from the regeneration valve 202 through the second pipeline 40 and the dryer 20.

[0042] In one embodiment, the regeneration gas storage unit 30 is in communication with the first pipeline 10. In one embodiment, the regeneration gas storage unit 30 is fixedly disposed inside the mounting bracket 100.

[0043] The second pipeline 40 connects the regeneration valve 202 of the dryer 20 with the regeneration gas storage unit 30 .

[0044] Specifically, when the auxiliary air supply device is in a closed state, the gas in the regeneration gas storage unit 30 flows back into the molecular sieve in the dryer 20, backblowing it, and finally the air flow is discharged from the regeneration valve 202 of the dryer 20, so that the molecular sieve in the dryer 20 is dried and regenerated.

[0045] like Figure 4 As shown, the delayed pressure relief device 50 includes a shell 501 and a shrinking and plugging sealing gasket 502. The shell 501 of the delayed pressure relief device 50 has a delayed air inlet 5011 and a delayed air outlet 5012, the delayed air inlet 5011 is connected to the branch of the third pipeline 60 and the delayed air outlet 5012 is connected to the atmosphere; the shrinking and plugging sealing gasket 502 is arranged inside the shell 501 and is located in the area between the delayed air inlet 5011 and the delayed air outlet 5012 of the shell 501, and the outer periphery of the shrinking and plugging sealing gasket 502 is sealed and connected to the inner wall of the shell 501. In one embodiment, the delayed pressure relief device 50 is arranged inside the mounting bracket 100 and its shell 501 is fixedly connected to the outer shell of the dryer 20.

[0046] Specifically, the shrink plug seal 502 is a plastic part with a very weak sealing ability, so it is similar to a slow exhaust shrink plug. When the compressed air enters the interior of the shell 501 of the delayed pressure relief device 50 through the delayed air inlet 5011 of the shell 501 of the delayed pressure relief device 50, the shrink plug seal 502 is closed under the impact of the compressed air entering, and the compressed air is blocked in the front of the shrink plug seal 502 and cannot pass through, and the delayed pressure relief device 50 is in a closed state. The closed state of the shrink plug seal 502 lasts for about thirty minutes, after which the shrink plug seal 502 will gradually be in an open state, and the compressed air can be discharged from the delayed air outlet 5012 of the shell 501 after passing through the shrink plug seal 502, and the delayed pressure relief device 50 is in an open state.

[0047] The third pipeline 60 includes a main line and two branches. The main line of the third pipeline 60 is connected to the compressed air discharge port 201 of the dryer 20 , and the two branches respectively connect the delayed pressure relief device 50 and the regeneration valve 202 of the dryer 20 to the main line of the third pipeline 60 .

[0048] The pre-control solenoid valve 70 is disposed on the main line of the third pipeline 60. In one embodiment, the pre-control solenoid valve 70 is disposed inside the mounting bracket 100 and its housing is fixedly connected to the housing of the dryer 20.

[0049] When the auxiliary air supply device is in the regeneration state of the dryer 20, the pre-control solenoid valve 70 is in a power-off state, the first pipeline 10 and the delayed pressure relief device 50 are both in a closed state, and the regeneration valve 202 of the dryer 20 is in an open state due to the air pressure in the third pipeline 60. The opening of the regeneration valve 202 of the dryer 20 has gas passing through the second pipeline 40 and the dryer 20 and coming from the regeneration air storage unit 30.

[0050] Specifically, the compressed air enters the main circuit of the third pipeline 60 through the compressed air outlet 201 of the dryer 20. When the pre-control solenoid valve 70 is in the energized state, the compressed air in the main circuit of the third pipeline 60 cannot pass through the pre-control solenoid valve 70, thereby disconnecting the main circuit of the third pipeline 60 from the branch circuit of the third pipeline 60; when the auxiliary air supply device is in the regeneration state of the dryer 20, the pre-control solenoid valve 70 is in the de-energized state, and because the first pipeline 10 is in the closed state, the compressed air in the main circuit of the third pipeline 60 can only enter the branch circuit of the third pipeline 60 through the pre-control solenoid valve 70, thereby reaching the interior of the delayed pressure relief device 50 and the dryer The interior of the pressure chamber 2023 of the regeneration valve 202 of the dryer 20, and because when the compressed air enters the interior of the delayed pressure relief device 50, the shrinkage sealing gasket 502 of the delayed pressure relief device 50 is closed under the impact of the compressed air entering, and the delayed pressure relief device 50 is in a closed state. Therefore, the compressed air in the third pipeline 60 cannot be discharged, which increases the pressure in the pressure chamber 2023 of the regeneration valve 202 of the dryer 20, thereby causing the position of the valve plug 2022 of the regeneration valve 202 of the dryer 20 to move downward, and the regeneration valve 202 of the dryer 20 is in an open state. After the dryer 20 is regenerated, water vapor is discharged from the regeneration valve 202 of the dryer 20.

[0051] like Figure 1 As shown, in one embodiment, when the auxiliary air supply device is in a closed state, the pre-control solenoid valve 70 is in a power-off state, the first pipeline 10 is in a closed state, the delayed pressure relief device 50 is in an open state, and the regeneration valve 202 of the dryer 20 is in a closed state because the gas in the third pipeline 60 is discharged from the delayed pressure relief device 50.

[0052] Specifically, the closed state of the shrinkage sealing gasket 502 of the delayed pressure relief device 50 lasts for about thirty minutes, and then gradually becomes open. The compressed air in the third pipeline 60 can be discharged from the delayed pressure relief device 50, so that the pressure in the pressure chamber 2023 of the regeneration valve 202 of the dryer 20 returns to normal, and the regeneration valve 202 of the dryer 20 is closed.

[0053] like Figure 1 As shown, in one embodiment, when the auxiliary air supply device is in the air supply state, the pre-control solenoid valve 70 is in the power-on state, the first pipeline 10 and the delayed pressure relief device 50 are both in the open state, the regeneration valve 202 of the dryer 20 is in the closed state, the branch of the third pipeline 60 is in the closed state and the interior of its main line has compressed gas that has passed through the first pipeline 10 and been dried by the dryer 20.

[0054] Specifically, when the auxiliary air supply device is in the air supply state, the pre-control solenoid valve 70 is in the energized state, and the compressed air in the main circuit of the third pipeline 60 cannot pass through the pre-control solenoid valve 70, thereby disconnecting the main circuit of the third pipeline 60 from the third pipeline 60, and the pressure in the pressure chamber 2023 of the regeneration valve 202 of the dryer 20 is normal. The regeneration valve 202 of the dryer 20 is closed, the dryer 20 does not regenerate, and the dried compressed air is discharged from the first pipeline 10.

[0055] like Figure 1 As shown, in one embodiment, the auxiliary air supply device further includes a compressor 80 and a fourth pipeline 90. The compressor 80 and the pre-control solenoid valve 70 have the same control circuit; the fourth pipeline 90 connects the air outlet of the compressor 80 with the air inlet of the dryer 20 and has a cooling pipe 901; the cooling pipe 901 is located in the area between the air outlet of the compressor 80 and the air inlet of the dryer 20.

[0056] like Figure 2-3 As shown, in one embodiment, the auxiliary air supply device further includes a mounting bracket 100. In order to reduce the weight of the auxiliary air supply device and facilitate the disassembly and maintenance of components, the side plate and the bottom plate of the mounting bracket 100 have a plurality of hollow holes. In one embodiment, in order to make the auxiliary air supply device more stable, the top of the mounting bracket 100 is fixedly connected to the vehicle mounting beam 1001. In one embodiment, the top of the mounting bracket 100 is fixedly connected to the vehicle mounting beam 1001 by threaded connection.

[0057] The specific working process of the utility model is as follows:

[0058] When the auxiliary air supply device is in the air supply state, the compressor 80 is powered on to generate compressed air, which passes through the fourth pipeline 90 and is cooled by the cooling pipe 901, and then enters from the air inlet of the dryer 20. After drying, the compressed air flows from the compressed air outlet 201 of the dryer 20 through the first pipeline 10 to the one-way valve 101, and finally outputs. At the same time, the compressed air dried by the dryer 20 is diverted to the regeneration air storage unit 30 for use during regeneration; at the same time, the pre-control solenoid valve 70 is in the powered state, and the compressed air in the main circuit of the third pipeline 60 cannot flow into the branch circuit of the third pipeline 60 through the pre-control solenoid valve 70, and the compressed air in the main circuit of the third pipeline 60 can control the regeneration of the dryer 20.

[0059] When the auxiliary air supply device is in the regeneration state of the dryer 20, the compressor 80 is powered off and does not work, the pre-control solenoid valve 70 is in a power-off state, and the compressed air in the main circuit of the third pipeline 60 enters the branch circuit of the third pipeline 60 through the pre-control solenoid valve 70, thereby reaching the interior of the delayed pressure relief device 50 and the interior of the pressure chamber 2023 of the regeneration valve 202 of the dryer 20. The delayed pressure relief device 50 is in a closed state, and the compressed air in the third pipeline 60 cannot be discharged, so that the pressure in the pressure chamber 2023 of the regeneration valve 202 of the dryer 20 increases. The regeneration valve 202 of the dryer 20 opens, and the air in the regeneration air storage unit 30 flows back into the molecular sieve in the dryer 20, backblowing it, taking away the moisture filtered in the molecular sieve in the dryer 20, and finally discharging it from the regeneration valve 202 of the dryer 20, so that the molecular sieve in the dryer 20 remains in a dry state.

[0060] The time delay pressure relief device 50 is closed for about thirty minutes, so as to ensure that the back-blowing air is completely discharged from the regeneration valve 202 of the dryer 20. After thirty minutes, the time delay pressure relief device 50 will gradually be in the open state, and the compressed air in the third pipeline 60 can be discharged to the empty state through the time delay pressure relief device 50, and the pressure in the pressure chamber 2023 of the regeneration valve 202 of the dryer 20 returns to normal, and the regeneration valve 202 of the dryer 20 is closed. At this time, all pipelines of the auxiliary air supply device are closed, and the entire auxiliary air supply device is in a closed state and isolated from the atmosphere. When the dryer 20 is in the regeneration state, the water vapor in the molecular sieve in the dryer 20 has been discharged, so as to ensure that the molecular sieve in the dryer 20 is well sealed when it is not working for a long time.

[0061] The above description is merely a preferred embodiment of one or more embodiments of the present specification and is not intended to limit one or more embodiments of the present specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present specification shall be included in the scope of protection of one or more embodiments of the present specification.

Claims

1. An auxiliary air supply device, characterized in that: The auxiliary air supply device is suitable for rail vehicles, and the auxiliary air supply device includes: First pipeline; A dryer having a compressed air outlet and a regeneration valve, wherein the compressed air outlet of the dryer is in communication with the first pipeline; A regenerative gas storage unit for storing dry gas; a second pipeline, connecting the regeneration valve of the dryer to the regeneration gas storage unit; Delayed pressure relief device; A third pipeline includes a main pipeline and two branches, wherein the main pipeline of the third pipeline is connected to the compressed air outlet of the dryer, and the two branches respectively connect the delayed pressure relief device and the regeneration valve of the dryer to the main pipeline of the third pipeline; a pre-control solenoid valve, arranged on the main line of the third pipeline; and When the auxiliary air supply device is in the dryer regeneration state, the pre-control solenoid valve is in a power-off state, the first pipeline and the delayed pressure relief device are both in a closed state, the regeneration valve of the dryer is in an open state due to the air pressure in the third pipeline, and the opening of the regeneration valve of the dryer has gas from the regeneration air storage unit through the second pipeline and the dryer.

2. The auxiliary air supply device according to claim 1, characterized in that: When the auxiliary air supply device is in a closed state, the pre-control solenoid valve is in a power-off state, the first pipeline is in a closed state, the delayed pressure relief device is in an open state, and the regeneration valve of the dryer is in a closed state because the gas in the third pipeline is discharged from the delayed pressure relief device.

3. The auxiliary air supply device according to claim 1, characterized in that: When the auxiliary air supply device is in the air supply state, the pre-control solenoid valve is in the power-on state, the first pipeline and the delayed pressure relief device are both in the open state, the regeneration valve of the dryer is in the closed state, the branch of the third pipeline is in the closed state and the interior of its main pipeline has compressed gas that has passed through the first pipeline and been dried by the dryer.

4. The auxiliary air supply device according to claim 1, characterized in that: The time-delay pressure relief device comprises: a housing having a delayed air inlet and a delayed air outlet, wherein the delayed air inlet is connected to a branch of the third pipeline and the delayed air outlet is connected to the atmosphere; and The shrinkage plugging sealing gasket is arranged inside the shell and is located in the area between the delayed air inlet and the delayed air outlet of the shell. The outer periphery of the shrinkage plugging sealing gasket is sealed and connected to the inner wall of the shell.

5. The auxiliary air supply device according to claim 1, characterized in that: The regeneration valve of the dryer comprises: A valve body having a regeneration valve port at the bottom; A valve plug, the main body of which is arranged inside the valve body and has a diameter smaller than the diameter of the inner wall of the valve body, the top of the valve plug has a first protrusion extending toward the outer periphery and the bottom of the valve plug has a second protrusion extending toward the outer periphery, the outer periphery of the first protrusion of the valve plug and the inner wall of the valve body form a sealed sliding structure; the area formed by the top wall of the valve plug and the inner wall of the valve body constitutes a pressure chamber of the regeneration valve, and the pressure chamber of the regeneration valve is connected to the branch of the third pipeline; and The bottom of the valve plug passes through the regeneration valve port of the valve body. When the pressure in the pressure chamber of the regeneration valve is in a normal state, the top wall of the second protrusion of the valve plug is in airtight contact with the outer wall of the valve body, and the regeneration valve is in a closed state.

6. The auxiliary air supply device according to claim 1, characterized in that: The auxiliary air supply device also includes: A compressor having the same control circuit as the pre-control solenoid valve; A fourth pipeline connects the air outlet of the compressor with the air inlet of the dryer. The fourth pipeline has a cooling pipe, and the cooling pipe is located in the area between the air outlet of the compressor and the air inlet of the dryer.

7. The auxiliary air supply device according to claim 1, characterized in that: The tail section of the first pipeline is provided with a one-way valve and a safety valve, and the safety valve is located in the area between the one-way valve and the compressed air outlet of the dryer.

8. The auxiliary air supply device according to claim 1, characterized in that: The auxiliary air supply device also includes a mounting bracket, and the side plate and the bottom plate of the mounting bracket both have a plurality of hollow holes.

9. A rail vehicle, characterized in that: It comprises the auxiliary air supply device as described in any one of claims 1 to 8.

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