A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve

Abstract

A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve comprises a pressure limiting valve, an empty and loaded vehicle conversion plug, a pressure reducing air cylinder and a brake pipeline; the empty and loaded vehicle conversion plug is provided with two positions, an empty parking position and a loaded parking position, and an exhaust hole; the upstream pressure input port of the pressure limiting valve is connected to the air brake of the vehicle, and the downstream pressure output port is connected to the brake cylinder; a branch is provided on the connection passage between the downstream pressure output port and the brake cylinder, and the branch connects the brake cylinder with the pressure reducing air cylinder, and the empty and loaded vehicle conversion plug is connected in series on the passage between the two; on the connection passage between the brake cylinder and the pressure reducing air cylinder, another branch is provided on the end of the empty and loaded vehicle conversion plug away from the brake cylinder, and the pressure reducing air cylinder, the brake cylinder and the empty vehicle pressure signal access port on the pressure limiting valve are connected; an empty and loaded position pressure display is provided on the valve cover of the pressure limiting valve. The device can be used to adjust the pressure of the empty and loaded vehicle brake cylinders, and can especially accurately control the pressure value of the empty parking brake cylinder to reduce the phenomenon of brake over-stickiness.

Description

Technical field:

[0001] The invention relates to the technical field of railway freight cars, in particular to the technical field of empty and loaded vehicle adjustment devices for railway freight car braking systems, and specifically to a manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve. Background technology:

[0002] There are two main types of empty and loaded vehicle adjustment devices for railway freight cars in my country: manual adjustment and automatic adjustment. The existing manual empty and loaded vehicle adjustment devices are generally two-level adjustments, including empty and loaded vehicle conversion plugs, empty vehicle safety valves, pressure-reducing air cylinders, and connecting pipes. The on-site operator determines the empty weight state of the vehicle. When the vehicle is in the heavy position, the empty and loaded vehicle conversion plug is placed in the heavy position, and the auxiliary air cylinder pressure air is all distributed to the brake cylinder, and the vehicle obtains the heavy vehicle braking force; when the vehicle is in the empty position, the empty and loaded vehicle conversion plug is placed in the empty position, and the auxiliary air cylinder pressure air is distributed to the brake cylinder and also diverted to the pressure-reducing air cylinder. Due to the volume ratio of the auxiliary air cylinder, the brake cylinder, and the pressure-reducing air cylinder, the vehicle obtains appropriate empty vehicle braking force. In case of excessive pressure reduction or emergency braking, the excess pressure air is discharged to the atmosphere through the empty vehicle safety valve.

[0003] The empty vehicle safety valve is a pressure-limiting component in the manual empty and loaded vehicle adjustment device of a truck. Its main function is to prevent the wheel tread from being scratched due to excessive brake cylinder pressure when the vehicle is empty. The empty parking brake cylinder pressure of the existing manual empty and loaded vehicle adjustment device is 190KPa. For vehicles that require a pressure less than 190KPa, this device has limitations. Summary of the invention:

[0004] In view of the above problems, the present invention provides a manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] The present invention provides a manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve. The manual empty and loaded vehicle adjustment device is in manual mode and is a two-stage empty and loaded vehicle adjustment device, which comprises a pressure limiting valve, an empty and loaded vehicle conversion plug door, a pressure reducing air cylinder and a brake pipeline; the pressure limiting valve and the pressure reducing air cylinder are installed and fixed on the vehicle body; the valve body of the pressure limiting valve is provided with an empty vehicle pressure signal access port, an upstream pressure input port, a downstream pressure output port and an empty and loaded position pressure display; the handle on the empty and loaded vehicle conversion plug door is provided with two positions of the plug door for opening and closing, namely, an empty vehicle position and a loaded vehicle position, and the door body of the empty and loaded vehicle conversion plug door is provided with an exhaust hole; the upstream The pressure input port is connected to the vehicle's air brake through a brake pipeline, and the downstream pressure output port is connected to the vehicle's brake cylinder through a brake pipeline; a branch is provided on the connection passage between the downstream pressure output port and the brake cylinder, connecting the brake cylinder with the pressure-reducing air cylinder, and the empty-weight vehicle conversion valve is connected in series on the passage between the brake cylinder and the pressure-reducing air cylinder; on the connection passage between the brake cylinder and the pressure-reducing air cylinder, another branch is provided on the end of the empty-weight vehicle conversion valve away from the brake cylinder, connecting the pressure-reducing air cylinder, the brake cylinder and the empty vehicle pressure signal access port through a brake pipeline; the empty-weight position pressure display is arranged on the valve cover of the pressure limiting valve.

[0007] The brake pipeline is connected by flange.

[0008] The brake pipeline is connected by threads, and the tee is a tee body with threads.

[0009] The pressure limiting valve is a universal accessory for railway freight cars.

[0010] The pressure limiting valve adopts a rubber template structure.

[0011] The pressure limiting valve uses different proportional values ​​according to the needs of different vehicle models.

[0012] The specification of the empty-loaded vehicle conversion plug door is DN20, and the open and closed positions of the empty-loaded vehicle conversion plug door correspond to the empty and loaded vehicle states of the vehicle respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention is based on the mature braking system technology of existing railway freight cars and takes into account the actual needs of specific users for manual empty and loaded vehicle adjustment devices, and replaces the automatic empty and loaded vehicle adjustment device with a manual empty and loaded vehicle adjustment device.

[0015] 2. The pressure limiting valve in the present invention is a universal accessory for national railway freight cars, with mature and reliable technology and good durability. The pressure limiting valve replaces the safety valve, and the pressure limiting valve is a rubber template structure, which reduces leakage and improves system safety.

[0016] 3. The pressure limiting valve of the present invention is provided with an empty and loaded pressure indicator. When the vehicle is loaded, the indicator is flipped up and visible, but when the vehicle is empty, the indicator is invisible. It can be judged whether the setting of the manual empty and loaded vehicle is consistent with the empty and loaded vehicle indicator status of the pressure limiting valve, thereby ensuring the situation where the brake cylinder pressure is too high or too low due to misoperation, thereby ensuring driving safety.

[0017] 4. The empty and loaded vehicle conversion cock of the present invention is improved into a self-exhaust structure. When the cock is set in an empty parking space, the exhaust port is closed. When it is set in a loaded parking space, the exhaust port is connected to the pressure-reducing air cylinder to discharge the compressed air remaining in the pressure-reducing air cylinder, so as to reduce the influence of the residual pressurized air in the air cylinder on the brake cylinder pressure when the empty parking space is used next time, thereby achieving the purpose of accurately controlling the pressure.

[0018] 5. The brake cylinder pressure of an empty vehicle after adjustment by the present invention is lower than that of an existing manual empty and loaded vehicle adjustment device. By changing the ratio of the pressure limiting valve, the pressure value of an empty parking space can be met by different vehicles. The system can accurately control the brake cylinder pressure of an empty parking space by adjusting the ratio of the pressure limiting valve and the volume of the pressure reducing air cylinder, and can meet the requirements of vehicles with a pressure value less than 190KPa.

[0019] The present invention is simple to operate, easy to install, and has mature and reliable technology. When necessary, the operator can realize the setting of empty and loaded vehicles by switching the open and closed states of the empty and loaded vehicle conversion plug gate, and can realize the adjustment of the brake cylinder pressure of the empty and loaded vehicles. In particular, it can accurately control the brake cylinder pressure value of the empty parking position, reduce the excessive brake cylinder pressure of the empty vehicle, cause the wheelset to lock, and cause wheel scratches. The present invention has great application prospects and social and economic benefits. Description of the drawings:

[0020] Figure 1 It is a connection principle diagram of a railway freight car brake system using the present invention;

[0021] Figure 2 This is an application example of the present invention on a railway freight car;

[0022] Figure 3 It is a schematic diagram of the structure of the present invention;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the pressure limiting valve of the present invention;

[0024] Figure 5 This is a front view of the interface of the pressure limiting valve of the present invention;

[0025] Figure 6 This is a front view of the empty-load vehicle conversion plug door of the present invention;

[0026] Figure 7 It is a top view of the empty and loaded vehicle conversion plug door of the present invention.

[0027] Reference numerals in the figures:

[0028] 1-pressure limiting valve, 2-empty and loaded vehicle conversion valve, 3-pressure reducing air cylinder, 4-brake main pipe, 5-dust collector, 6-acceleration relief air cylinder, 7-air brake, 8-auxiliary air cylinder, 9-brake cylinder.

[0029] 1.1-empty vehicle pressure signal inlet, 1.2-upstream pressure input port, 1.3-downstream pressure output port,

[0030] 1.4- Empty weight pressure indicator.

[0031] 2.1-empty parking space, 2.2-full parking space, 2.3-exhaust hole. Specific implementation method:

[0032] The technical solution will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figure 1-Figure 7 The present invention provides a manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve. The manual empty and loaded vehicle adjustment device is in manual mode and is a two-stage empty and loaded vehicle adjustment device. The adjustment device includes a pressure limiting valve 1, an empty and loaded vehicle conversion plug gate 2, a pressure reducing air cylinder 3, and a brake pipeline, etc., which replaces the original manual empty and loaded vehicle adjustment device composed of a safety valve, an empty and loaded vehicle conversion plug gate, and a pressure reducing air cylinder. The pressure limiting valve 1 and the pressure reducing air cylinder 3 are installed and fixed on the vehicle body. The valve body of the pressure limiting valve 1 is provided with an empty vehicle pressure signal access port 1.1, an upstream pressure input port 1.2, a downstream pressure output port 1.3, and an empty and loaded position pressure display 1.4; the handle on the empty and loaded vehicle conversion plug gate 2 is provided with two positions of the plug gate for opening and closing, an empty parking position 2.1 and a loaded parking position 2.2, and the door body of the empty and loaded vehicle conversion plug gate 2 is provided with an exhaust hole 2.3. The upstream pressure input port 1.2 is connected to the vehicle's air brake 7 through a brake pipeline; the downstream pressure output port 1.3 is connected to the vehicle's brake cylinder 9 through a brake pipeline, and a branch is provided on the connection passage between the downstream pressure output port 1.3 and the brake cylinder 9, connecting the brake cylinder 9 with the pressure-reducing air cylinder 3, and the empty-load vehicle conversion plug gate 2 is connected in series on the passage between the brake cylinder 9 and the pressure-reducing air cylinder 3; on the connection passage between the brake cylinder 9 and the pressure-reducing air cylinder 3, another branch is provided downstream of the empty-load vehicle conversion plug gate 2 (away from one end of the brake cylinder 9), connecting the pressure-reducing air cylinder 3, the brake cylinder 9 and the empty vehicle pressure signal access port 1.1 through a brake pipeline. The empty-weight position pressure display 1.4 is arranged on the valve cover of the pressure limiting valve 1. The brake pipeline can be connected by flange or threaded connection. When threaded connection is adopted, the flange tee is replaced with a threaded tee. The pressure limiting valve 1 is a universal accessory for railway freight cars, with mature and reliable technology and good durability. The pressure limiting valve 1 adopts a rubber template structure, which reduces leakage and improves system safety.

[0034] The working principle of this manual empty and loaded vehicle adjustment device is as follows:

[0035] On the underframe of a railway freight car using the manual empty and loaded vehicle adjustment device, the dust collector 5 is connected to the brake main pipe 4 and the air brake 7 respectively through brake pipes; the air brake 7 is connected to the acceleration relief air cylinder 6, the auxiliary air cylinder 8, and the pressure limiting valve 1 respectively through brake pipes; the pressure limiting valve 1 is connected to the brake cylinder 9, the empty and loaded vehicle conversion plug 2, and the pressure reducing air cylinder 3 respectively through brake pipes.

[0036] When the air brake 7 is in the fully released state, the manual empty-weight vehicle adjustment device and the brake cylinder 9 are both in a non-pressurized air state, and the empty-weight position pressure indicator 1.4 on the valve cover of the pressure-limiting valve 1 is invisible.

[0037] When the handle of the empty-load vehicle conversion plug gate 2 is set to the position of the empty vehicle position 2.1, the empty-load vehicle conversion plug gate 2 is opened, and at this time, the pressure-reducing air cylinder 3 and the upper cavity of the rubber diaphragm plate of the pressure-limiting valve 1 are connected with the brake cylinder 9; when the train pipe is decompressed and braked, the air brake motor 7 is actuated, and the pressurized air of the auxiliary air cylinder 8 enters the upstream pressure input port 1.2 of the pressure-limiting valve 1 through the air brake motor 7, and is discharged from the downstream pressure output port 1.3 of the pressure-limiting valve 1 to inflate the brake cylinder 9 and the pressure-reducing air cylinder 3 and the upper cavity of the rubber diaphragm plate of the pressure-limiting valve 1. When the air pressure in the pressure-reducing air cylinder 3 and the upper cavity of the rubber diaphragm plate of the pressure-limiting valve 1 rises to a certain level, it works together with the air pressure of the brake cylinder 9 passing through the top of the piston of the pressure-limiting valve 1 to move the piston in the pressure-limiting valve 1 downward, the sandwich valve is closed, and the auxiliary air cylinder 8 stops inflating the brake cylinder 9, maintaining the air pressure of the brake cylinder 9 and the pressure-reducing air cylinder 3 unchanged, forming the pressure of the empty vehicle brake cylinder 9.

[0038] When the handle of the empty-loaded vehicle conversion plug gate 2 is set to the position of the heavy vehicle position 2.2, the empty-loaded vehicle conversion plug gate 2 is closed, and the pressure-reducing air cylinder 3, the rubber diaphragm upper cavity of the pressure-limiting valve 1 and the brake cylinder 9 are not connected; when the train pipe is decompressed and braked, the air brake 7 is actuated, and the pressurized air of the auxiliary air cylinder 8 enters the upstream pressure input port 1.2 of the pressure-limiting valve 1 through the air brake 7, and is discharged from the downstream pressure output port 1.3 of the pressure-limiting valve 1, and is directly charged into the brake cylinder 9, and the vehicle obtains the heavy vehicle pressure. At this time, the empty-loaded position pressure display 1.4 on the valve cover of the pressure-limiting valve 1 turns 90° under the joint action of the air pressure of the brake cylinder 9 and the internal spring, and displays the heavy vehicle position.

[0039] When the empty-loaded vehicle conversion plug gate 2 is set at the heavy vehicle position 2.2, the exhaust hole 2.3 on the door body of the empty-loaded vehicle conversion plug gate 2 is connected to the pressure-reducing air cylinder 3, and the pressurized air in the pressure-reducing air cylinder 3 can be discharged. The purpose of this design is that if an error operation occurs during the heavy vehicle braking, the empty-loaded vehicle conversion plug gate 2 originally set at the closed position is opened and then closed, which will cause part of the pressurized air to enter the pressure-reducing air cylinder 3 and cannot be discharged. If this part of the compressed air is not discharged, it may cause disturbance to the pressure of the brake cylinder 9 during the next empty vehicle braking.

[0040] When the train pipe inflation is relieved, the air brake 7 is activated, and its brake hole is switched to the atmosphere. The air pressure at the upstream pressure input port 1.2 of the pressure limiting valve 1 decreases rapidly, and the sandwich valve therein is pushed open by the pressurized air passing through the brake cylinder 9. The pressurized air in the brake cylinder 9 passes through the pressure limiting valve 1 and the air brake 7 to be exhausted to the outside.

[0041] This manual empty and loaded vehicle adjustment device is different from the manual two-stage empty and loaded vehicle adjustment device using a safety valve. This manual empty and loaded vehicle adjustment device innovatively uses a pressure limiting valve 1 to adjust the pressure value of the brake cylinder 9 when the vehicle is in an empty parking space. By selecting a pressure limiting valve 1 with different proportional values, the required empty parking space brake cylinder 9 pressure can be accurately adjusted. The vehicle with a manual two-stage empty and loaded vehicle adjustment device using a safety valve has an empty vehicle brake cylinder pressure value of 190KPa, which is not suitable for vehicles that require an empty vehicle pressure value lower than 190KPa. When the manual empty and loaded vehicle adjustment device is set at the heavy parking position 2.2, the bypass on the branch pipe of the brake cylinder 9 is not connected, and the pressure limiting valve 1 and the pressure reducing air cylinder 3 do not participate in the action. At this time, all the compressed air output by the air brake 7 is directed to the brake cylinder 9 to achieve the pressure of the brake cylinder 9 at the heavy parking position; when the manual empty and loaded vehicle adjustment device is set at the empty parking position 2.1, the bypass on the branch pipe of the brake cylinder 9 is connected, and the pressure limiting valve 1 and the pressure reducing air cylinder 3 participate in the action. A part of the compressed air directed to the brake cylinder 9 enters the pressure reducing air cylinder 3, and the actual volume increases to achieve the purpose of pressure reduction. The pressure limiting valve 1 is responsible for adjusting the pressure value of the brake cylinder 9 of the empty parking position of the vehicle. The pressure limiting valve 1 can be flexibly configured. According to the needs of different vehicle models, the pressure limiting valve 1 with different proportional values ​​can be selected to meet the needs of different empty parking position pressures. There is an empty and loaded vehicle indicator on the valve cover of the pressure limiting valve 1, which can indicate the empty and loaded vehicle status set by the current vehicle, while the safety valve does not have an empty and loaded vehicle indicator. There is an empty and loaded pressure indicator 1.4 on the valve cover of the pressure limiting valve 1. When the heavy vehicle is braked, the empty and loaded pressure indicator 1.4 will flip up, indicating that the pressure of the brake cylinder 9 is the heavy vehicle pressure. When the empty vehicle is braked, the empty and loaded pressure indicator 1.4 will not flip up. The specification of the empty and loaded vehicle conversion plug gate 2 is DN20. The open and closed positions of the empty and loaded vehicle conversion plug gate 2 correspond to the empty and loaded vehicle states of the vehicle respectively; the empty and loaded vehicle conversion plug gate 2 is provided with an exhaust hole 2.3 to prevent residual air from affecting the braking. When the parking space is empty, the pressure reducing air cylinder 3 is used to divert the pressure air of the brake cylinder 9, and does not participate in the action when the parking space is heavy.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve, the manual empty and loaded vehicle adjustment device is in manual mode and is a two-stage empty and loaded vehicle adjustment device, characterized in that: The adjustment device comprises a pressure limiting valve (1), an empty-load vehicle conversion plug gate (2), a pressure reducing air cylinder (3) and a brake pipeline; the pressure limiting valve (1) and the pressure reducing air cylinder (3) are mounted and fixed on the vehicle body; the valve body of the pressure limiting valve (1) is provided with an empty vehicle pressure signal access port (1.1), an upstream pressure input port (1.2), a downstream pressure output port (1.3) and an empty-load position pressure display (1.4); the handle on the empty-load vehicle conversion plug gate (2) is provided with two positions of the plug gate, an empty position (2.1) and a loaded position (2.2), and the door body of the empty-load vehicle conversion plug gate (2) is provided with an exhaust hole (2.3); the upstream pressure input port (1.2) is connected to the vehicle's air brake (7) through a brake pipeline. The downstream pressure output port (1.3) is connected to the brake cylinder (9) of the vehicle through a brake pipeline; a branch is provided on the connection passage between the downstream pressure output port (1.3) and the brake cylinder (9) to connect the brake cylinder (9) with the pressure reducing air cylinder (3); the empty-load vehicle conversion valve (2) is connected in series to the passage between the brake cylinder (9) and the pressure reducing air cylinder (3); on the connection passage between the brake cylinder (9) and the pressure reducing air cylinder (3), another branch is provided at the end of the empty-load vehicle conversion valve (2) away from the brake cylinder (9) to connect the pressure reducing air cylinder (3), the brake cylinder (9) and the empty-load pressure signal access port (1.1) through a brake pipeline; the empty-load position pressure display (1.4) is arranged on the valve cover of the pressure limiting valve (1).

2. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The brake pipeline is connected by flange.

3. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The brake pipeline is connected by threads, and the tee is a tee body with threads.

4. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The pressure limiting valve (1) is a universal accessory for railway freight cars.

5. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The pressure limiting valve (1) adopts a rubber template structure.

6. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The pressure limiting valve (1) uses different proportional values ​​according to the needs of different vehicle models.

7. A manual empty and loaded vehicle adjustment device equipped with a pressure limiting valve according to claim 1, characterized in that: The specification of the empty-loaded vehicle conversion plug door (2) is DN20, and the open and closed positions of the empty-loaded vehicle conversion plug door (2) correspond to the empty vehicle state and the loaded vehicle state, respectively.

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