Pantograph pneumatic control valve box

Abstract

This utility model discloses a pantograph pneumatic control valve box, relating to the field of pantograph control technology. The control valve box includes a housing, valve plate, manual valve, check valve, pressure switch, filter, solenoid valve, manual reversing valve, and terminal block. This utility model employs the coordinated operation of the main air inlet and the electric pump air inlet, enabling the pantograph pneumatic circuit to quickly reach the required pressure. Through the cooperation of various components, it achieves automatic pantograph raising and lowering, emergency lowering, and backup air supply functions. This valve box effectively solves the problems of poor reliability and weak emergency response capability in traditional pneumatic control systems, achieving precise and stable control of the pantograph and significantly improving the stability and safety of the rail transit power supply system.

Description

Technical Field

[0001] This utility model relates to the field of pantograph control, specifically to a novel pantograph pneumatic control valve box. Background Technology

[0002] In the rail transit system, the pantograph, as the core device for electric locomotives to obtain power from the overhead contact line, is crucial for ensuring continuous power supply to the locomotives. The pantograph pneumatic control valve box, as a core component for regulating the pantograph's raising and lowering movements and maintaining stable pneumatic pressure, directly determines the pantograph's operational efficiency. Existing pantograph pneumatic control valve boxes suffer from several problems that urgently need to be addressed. First, the pneumatic circuit design often relies on a single air source. When the main air source experiences pressure fluctuations or supply interruptions, the pantograph cannot complete its raising and lowering movements normally, easily leading to power outages and severely impacting the operational efficiency and punctuality of rail transit. Second, emergency response mechanisms are lacking. In the event of failures in critical components such as solenoid valves, there is a lack of reliable emergency pantograph lowering methods and backup pneumatic supply schemes, making it impossible to ensure the safe descent of the pantograph and posing significant safety hazards. Furthermore, the internal component layout is not scientifically sound, and the pneumatic circuit connections are complex, increasing the risk of gas leakage and making precise pressure monitoring and regulation difficult, resulting in a significant increase in maintenance difficulty and cost. In addition, the electrical control system has low integration with the pneumatic system, poor signal transmission stability, and often results in control delays or malfunctions, which seriously affect the accuracy and timeliness of pantograph lifting control. Summary of the Invention

[0003] The purpose of this utility model is to provide a pantograph pneumatic control valve box. By innovating the pneumatic circuit structure, optimizing the component layout, and strengthening the coordinated control of the electrical and pneumatic circuits, it effectively solves the problems of poor reliability, insufficient emergency response capability, and insufficient pneumatic pressure existing in traditional valve boxes, achieving stable and precise control of the pantograph raising and lowering process, and comprehensively improving the safety and reliability of the rail transit power supply system. To achieve the above objectives, this utility model adopts the following technical solution:

[0004] A pantograph pneumatic control valve box, characterized in that it includes a box body, two sets of valve plates (2-1, 2-2), five sets of manual valves (3-1, 3-2, 3-3, 3-4, 3-5), two sets of one-way valves (4-1, 4-2), a pressure switch, a filter, a solenoid valve, a manual directional valve, and a terminal block. The valve plates (2-1) and (2-2) are connected by pipelines. The valve plates (2-1) and (2-2) are installed on the left and right sides of the box body. The manual valves (3-1, 3-2), one-way valves (4-1, 4-2), and pressure switch are installed on the valve plate (2-1). The manual valves (3-3, 3-4, 3-5), filter, solenoid valve, and manual directional valve are installed on the valve plate (2-2). The terminal block is installed inside the box body. The valve plate (2-1) is provided with a main air inlet and... The electric pump inlet, main air inlet, manual valve (3-1), check valve (4-1), and pressure switch are connected in sequence to form the main air control branch. The electric pump inlet, manual valve (3-2), check valve (4-2), and pressure switch are connected in sequence to form the electric pump control branch. The valve plate (2-2) is equipped with a foot pump inlet, a bow raising port, and a bow lowering port. The gas in the valve plate (2-1) that passes through the pressure switch is connected to the filter on the valve plate (2-2) through a pipeline. The gas path after the filter is divided into two paths. One path is connected to the manual valve (3-3) and then directly connected to the bow lowering port to form an emergency bow lowering gas path. The other path is connected to the solenoid valve. Its working port 1 is connected to the manual valve (3-4) and the bow raising port, and its working port 2 is connected to the manual valve (3-5) and the bow lowering port to form an automatic bow raising and lowering gas path. The foot pump inlet is connected to the manual reversing valve.

[0005] 2. Further, the pantograph pneumatic control valve box is characterized in that: the box body is used to accommodate and protect the internal valve plate and components.

[0006] Furthermore, the pantograph pneumatic control valve box is characterized in that: the two sets of valve plates are aluminum plates, connected together by pipelines, and have internal channels for connecting the pneumatic circuit.

[0007] Furthermore, the pantograph air circuit control valve box is characterized in that: the manual valves are respectively installed in the main air control branch, the electric pump control branch, the emergency pantograph lowering air circuit, the automatic pantograph lowering air circuit, and the automatic pantograph raising air circuit.

[0008] Furthermore, the pantograph air circuit control valve box is characterized in that: the one-way valves are respectively installed in the main air control branch and the electric pump control branch.

[0009] Furthermore, the pantograph pneumatic control valve box is characterized in that: the pressure switch is installed after the check valve.

[0010] Furthermore, the pantograph pneumatic control valve box is characterized in that: the filter is installed after the pressure switch.

[0011] Furthermore, the pantograph pneumatic control valve box is characterized in that: the solenoid valve is a three-position five-way dual-electro-controlled solenoid valve.

[0012] Furthermore, the pantograph air circuit control valve box is characterized in that: the manual reversing valve has three working positions: middle position, pantograph raising position, and pantograph lowering position. When the main air inlet is supplying air normally, the manual reversing valve is in the middle position, cutting off the foot pump air circuit.

[0013] Furthermore, the pantograph pneumatic control valve box is characterized in that: the terminal block is installed in a reserved mounting position on the upper right side inside the box.

[0014] Compared with the prior art, the advantages of this utility model are: The stability of the gas supply has been greatly improved: the main air inlet and the electric pump air inlet work together to effectively avoid the pantograph from failing to rise and fall normally due to insufficient pressure, significantly reducing the probability of locomotive power outages and ensuring the continuity of rail transit operation.

[0015] Easy maintenance: The valve box adopts a modular design concept, with two sets of valve plates having clearly defined functions, and the layout of each component is scientific and reasonable, with clear and intuitive air circuit connections. The manual valve allows operators to quickly cut off the air circuit during maintenance, greatly reducing the risk of air leakage and facilitating quick location and troubleshooting of air circuit faults, significantly shortening maintenance time and reducing maintenance costs. At the same time, the box effectively protects the internal components, reducing damage to components from external factors and extending the service life of each component. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a pantograph pneumatic control valve box provided by this utility model. Figure 2 A schematic diagram of the air circuit of a pantograph air circuit control valve box provided for this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. It should be noted that similar reference numerals and letters in the following drawings indicate similar items. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0023] like Figure 1As shown, a pantograph pneumatic control valve box includes a box body (1), two sets of valve plates (2-1, 2-2), five sets of manual valves (3-1, 3-2, 3-3, 3-4, 3-5), two sets of check valves (4-1, 4-2), a pressure switch (5), a filter (6), a solenoid valve (7), a manual reversing valve (8), and a terminal block (9) installed in the box body (1).

[0024] Under normal operating conditions, compressed air from the main air inlet enters the main air control branch via the manual valve (3-1). The check valve (4-1) prevents gas backflow, and the gas smoothly reaches the pressure switch (5). At this time, if the pressure switch (5) detects that the gas pressure is within the normal range, the gas enters the filter (6) of the valve plate (2-2) through the pipeline. The filtered gas is connected to the solenoid valve (7). When the terminal block (9) receives the raising command signal from the control system, it controls the solenoid valve (7) to open working port 1, and the gas enters the raising port via the manual valve (3-4). When the lowering command signal is received, the working port 2 of the solenoid valve (7) is opened, and the gas enters the lowering port via the manual valve (3-5). When the air pressure at the main air inlet is lower than the minimum required pressure, the pressure switch (5) quickly sends a signal back to the control system, which then starts the electric pump. The gas at the electric pump inlet merges with the gas at the main air inlet at the pressure switch (5) via the manual valve (3-2) and the check valve (4-2) to replenish the pressure. When the air pressure rises back to a level greater than the set pressure, the pressure switch (5) sends a signal again to stop the electric pump and maintain a stable air supply pressure.

[0025] If the solenoid valve (7) malfunctions and the pantograph cannot be automatically raised or lowered, the operator can manually operate the manual reversing valve (8) to switch it from the middle position to the raising or lowering position. This allows the gas from the foot pump inlet to be supplied to the raising or lowering port via the manual reversing valve (8), ensuring that the locomotive can maintain basic operation even in a faulty state. In extreme cases where both the solenoid valve (7) and the manual reversing valve (8) malfunction, the operator can open the manual valve (3-3) and use the emergency lowering air path to allow gas to enter the lowering port via the manual valve (3-3), forcing the pantograph to descend and ensuring the safety of rail transit operation. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pantograph pneumatic control valve box, characterized in that: The enclosure includes a housing (1), two sets of valve plates (2-1, 2-2), five sets of manual valves (3-1, 3-2, 3-3, 3-4, 3-5), two sets of check valves (4-1, 4-2), a pressure switch (5), a filter (6), a solenoid valve (7), a manual directional valve (8), and a terminal block (9). The valve plates (2-1) and (2-2) are connected by pipelines. The valve plates (2-1) and (2-2) are installed on the left and right sides inside the housing (1). The manual valves (3-1, 3-2), check valves (4-1, 4-2), and pressure switch (5) are installed on the valve plate (2-1). The manual valves (3-3, 3-4, 3-5), filter (6), solenoid valve (7), and manual directional valve (8) are installed on the valve plate (2-2). The terminal block (9) is installed inside the housing (1). The valve plate (2-1) is provided with a main air inlet and a... The electric pump inlet, main air inlet, manual valve (3-1), check valve (4-1), and pressure switch (5) are connected in sequence to form the main air control branch. The electric pump inlet, manual valve (3-2), check valve (4-2), and pressure switch (5) are connected in sequence to form the electric pump control branch. The valve plate (2-2) is provided with a foot pump inlet, a bow lifting port, and a bow lowering port. The gas in the valve plate (2-1) through the pressure switch (5) is connected to the filter (6) on the valve plate (2-2) through the pipeline. The gas path after the filter (6) is divided into two. One path is connected to the manual valve (3-3) and then directly connected to the bow lowering port to form an emergency bow lowering gas path. The other path is connected to the solenoid valve (7). Its working port 1 is connected to the manual valve (3-4) and the bow lifting port, and its working port 2 is connected to the manual valve (3-5) and the bow lowering port to form an automatic bow lifting gas path. The foot pump inlet is connected to the manual reversing valve (8).

2. The pantograph pneumatic control valve box according to claim 1, characterized in that: The housing (1) is used to house and protect the internal valve plate and components.

3. The pantograph pneumatic control valve box according to claim 1, characterized in that: The valve plates (2-1, 2-2) are made of aluminum plates and are connected together by pipes. They have internal channels for connecting the air passage.

4. The pantograph pneumatic control valve box according to claim 1, characterized in that: The manual valves (3-1, 3-2, 3-3, 3-4, 3-5) are respectively installed in the main air control branch, the electric pump control branch, the emergency lowering air circuit, the automatic lowering air circuit, and the automatic raising air circuit.

5. The pantograph pneumatic control valve box according to claim 1, characterized in that: The one-way valves (4-1, 4-2) are respectively installed in the main air control branch and the electric pump control branch.

6. The pantograph pneumatic control valve box according to claim 1, characterized in that: The pressure switch (5) is installed after the check valve (4-1, 4-2).

7. The pantograph pneumatic control valve box according to claim 1, characterized in that: The filter (6) is installed after the pressure switch (5).

8. The pantograph pneumatic control valve box according to claim 1, characterized in that: The solenoid valve (7) is a three-position five-way dual-electric control solenoid valve.

9. The pantograph pneumatic control valve box according to claim 1, characterized in that: The manual reversing valve (8) has three working positions: middle position, raised bow position and lowered bow position. When the main air inlet is supplying air normally, the manual reversing valve (8) is in the middle position.

10. The pantograph pneumatic control valve box according to claim 1, characterized in that: The terminal block (9) is installed in the reserved mounting position on the upper right side inside the enclosure (1).

Images