Automatic vacuum blow-down valve and blow-down device for high-speed rail

Abstract

The invention discloses an automatic vacuum blow-down valve and a blow-down device for a high-speed rail. The vacuum blow-down valve comprises a valve body and a valve rod. The valve body is provided with a sewage suction port and a sewage discharge port; a sealing partition plate is arranged in an inner cavity of the valve body and divides the inner cavity of the valve body into a sewage discharging cavity and a working cavity. The two ends of the valve rod are connected with a valve plate and a piston which are arranged at the two ends of the valve rod respectively. The valve plate abuts against the inner wall of the valve body and is used for communicating or separating the sewage suction opening and the sewage outlet. The piston is arranged in the working cavity, the piston moves in the working cavity and divides the working cavity into a breathing cavity and a negative pressure cavity, the breathing cavity is communicated with the external atmosphere, and the negative pressure cavity is communicated with the drain outlet; an elastic piece is arranged in the negative pressure cavity, and the two ends of the elastic piece are connected with the piston and the inner wall of the negative pressure cavity respectively. The vacuum blow-down valve and the blow-down device are convenient to operate and high in blow-down efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage valves, and more particularly to an automatic vacuum sewage valve and sewage discharge device for high-speed railways. Background Art

[0002] During the operation of high-speed trains, the excrement generated by passengers needs to be collected and treated through an effective sewage system. At present, existing high-speed trains generally use vacuum toilet systems, which work by using positive and negative pressure differences to suck excrement into the sewage tank. Although this system has improved the sewage discharge efficiency to a certain extent, there are still many problems in the sewage discharge link after the train arrives at the station.

[0003] The existing sewage discharge process of high-speed railways requires a dedicated person to manually connect the sewage pipe to the sewage tank, then open the sewage valve and start the vacuum pump in sequence to suck the waste in the sewage tank into the sewage pump station at the station. This process requires manual operation one by one, which is not only labor-intensive and time-consuming, but also has a harsh operating environment, which brings great inconvenience to the staff.

[0004] Therefore, it is an urgent problem for technical personnel in this field to develop an automatic vacuum drain valve and drain device for high-speed railways that is easy to operate and highly efficient. Summary of the invention

[0005] In view of this, the present invention provides an automatic vacuum drain valve and drain device for high-speed railways that are easy to operate and highly efficient.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] Automatic vacuum drain valve for high-speed rail, including:

[0008] A valve body, wherein the valve body is provided with a sewage suction port and a sewage discharge port; a sealing partition is arranged in the inner cavity of the valve body, and the sealing partition divides the inner cavity of the valve body into a sewage discharge cavity and a working cavity;

[0009] A valve stem, with valve plates and pistons connected at both ends of the valve stem, and the valve plates and pistons are respectively arranged at both ends of the valve stem; the valve plate abuts against the inner wall of the valve body, and the valve plate is used to connect or isolate the sewage suction port and the sewage discharge port; the piston is placed in the working chamber, and the piston moves in the working chamber and divides the working chamber into a breathing chamber and a negative pressure chamber, the breathing chamber is connected to the external atmosphere, and the negative pressure chamber is connected to the sewage discharge port; an elastic member is arranged in the negative pressure chamber, and the two ends of the elastic member are respectively connected to the piston and the inner wall of the negative pressure chamber.

[0010] The beneficial effect of adopting the above technical solution is that the piston is moved by using negative pressure and reset by the elastic member, so that the vacuum drain valve can be automatically started and stopped.

[0011] Preferably, the valve body is provided with a valve seat, and the valve plate abuts against the valve seat. The tight fit between the valve seat and the valve plate ensures the sealing performance of the valve and avoids sewage leakage.

[0012] Preferably, the side wall of the breathing chamber is provided with air holes, which enable the breathing chamber to communicate with the external atmosphere, ensure that the pressure in the breathing chamber is equal to the atmospheric pressure, provide a stable external pressure environment for the normal movement of the piston, and enable the piston to smoothly generate an upward pulling force under the action of negative pressure, pushing the valve plate to open the valve.

[0013] Preferably, an air pipe is connected between the negative pressure chamber and the sewage outlet.

[0014] The automatic sewage discharge device for high-speed railway includes a vacuum sewage discharge valve, a sewage tank, a vacuum pump, an electric telescopic pipe and a controller; the sewage tank, the vacuum pump and the electric telescopic pipe are connected in sequence through the sewage discharge pipe; the vacuum sewage discharge valve is connected to the sewage discharge pipe between the sewage tank and the vacuum pump; the telescopic end of the electric telescopic pipe is connected to the sewage pipe; the controller is connected to the vacuum pump and the electric telescopic pipe, and sends instructions to the vacuum pump and the electric telescopic pipe. The controller can automatically control the start and stop of the vacuum pump and the electric telescopic pipe according to the sewage tank liquid level information detected by the liquid level sensor, thereby realizing precise control of the sewage discharge process and ensuring that the sewage in the sewage tank can be discharged in a timely and effective manner.

[0015] Preferably, a liquid level sensor is provided at the bottom of the sewage tank, and the liquid level sensor is connected to the controller. The liquid level sensor can monitor the liquid level change in the sewage tank in real time and transmit the liquid level signal to the controller. The controller accurately controls the start and stop of the vacuum pump and the electric telescopic tube according to the liquid level signal.

[0016] Preferably, the sewage discharge device also includes a fault feedback module, which receives signals sent by the liquid level sensor, vacuum pump, electric telescopic tube, and feeds the signals back to the controller. The fault feedback module can receive signals sent by components such as the liquid level sensor, vacuum pump, electric telescopic tube, and analyze and process these signals, thereby achieving real-time monitoring and fault diagnosis of the operating status of the sewage discharge device. Once an abnormality is detected, the fault feedback module can promptly identify and display the fault location, and feed back the fault information to the main control room, so that the staff can promptly discover and handle the fault.

[0017] Preferably, the controller is arranged in the driving control room. The controller is arranged in the driving control room, which is convenient for the staff to centrally manage and monitor the operation status of the entire sewage system, and timely understand the liquid level of the sewage tank, the working status of the vacuum pump and the electric telescopic pipe, etc., so as to realize the remote control and management of the sewage process, and improve the work efficiency and management level.

[0018] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an automatic vacuum drain valve and drain device for high-speed railways, which have the following beneficial effects:

[0019] (1) Through the coordinated work of the electric telescopic tube, vacuum pump, liquid level sensor and fault feedback module, the entire sewage discharge process is fully automated. After the train arrives at the station, the main control room only needs to send a start signal, and the electric telescopic tube will automatically extend into the station sewage pipe, triggering the vacuum pump to start, and the vacuum sewage valve will automatically open under the action of negative pressure to discharge sewage; after the sewage is discharged, the liquid level sensor triggers the vacuum pump and the electric telescopic tube to close, without manual intervention, which greatly reduces the workload of manual operation, reduces labor intensity, and improves the working environment;

[0020] (2) The vacuum drain valve is automatically opened and closed only by the negative pressure generated by the vacuum pump, without the need for additional electric or starting actuators. This simplifies the equipment structure, reduces equipment failure points, and improves the reliability and stability of the equipment, thereby ensuring the efficient discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the vacuum drain valve provided by the present invention;

[0023] Figure 2 This is a schematic structural diagram of the sewage discharge device provided by the present invention.

[0024] Among them, in the figure,

[0025] 1- Valve body;

[0026] 11-sewage suction port; 12-sewage discharge port; 13-breathing chamber; 14-negative pressure chamber; 15-valve seat; 16-air hole;

[0027] 2-valve stem; 3-valve plate; 4-piston; 5-sealing partition; 6-elastic part; 7-air pipe; 8-sewage tank; 9-vacuum pump; 10-electric telescopic tube; 011-drain pipe; 012-sewage pipe; 013-liquid level sensor; 014-fault feedback module; 015-controller; 016-vacuum drain valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] like Figure 1 As shown, the embodiment of the present invention discloses an automatic vacuum drain valve for high-speed railway, comprising:

[0031] A valve body 1 is provided with a sewage suction port 11 and a sewage discharge port 12; a sealing partition 5 is provided in the inner cavity of the valve body 1, and the sealing partition 5 divides the inner cavity of the valve body 1 into a sewage discharge cavity and a working cavity;

[0032] The valve stem 2 has a valve plate 3 and a piston 4 connected to both ends of the valve stem 2. The valve plate 3 and the piston 4 are respectively arranged at both ends of the valve stem 2. The valve plate 3 abuts against the inner wall of the valve body 1. The valve plate 3 is used to connect or block the sewage suction port 11 and the sewage discharge port 12. The piston 4 is placed in the working chamber. The piston 4 moves in the working chamber and divides the working chamber into a breathing chamber 13 and a negative pressure chamber 14. The breathing chamber 13 is connected to the external atmosphere, and the negative pressure chamber 14 is connected to the sewage discharge port 12. An elastic member 6 is arranged in the negative pressure chamber 14. The two ends of the elastic member 6 are respectively connected to the piston 4 and the inner wall of the negative pressure chamber 14. The elastic member 6 can be a spring.

[0033] In order to further optimize the above technical solution, the automatic start of the vacuum drain valve is achieved by utilizing the cross-sectional area difference between the piston 4 and the valve stem 2; Figure 1 As shown, the cross-sectional area S2 of the piston 4 is much larger than the cross-sectional area S1 of the valve stem 2. When the pressure at the drain outlet 12 of the valve body 1 decreases, the pressure of the breathing chamber > the pressure of the negative pressure chamber = the pressure of the inner chamber of the valve body, that is, P 呼 >P 负 =P 内 , and S2>S1, then F2>F1, (F2=(P 呼 -P 负 )*S2,F1=(P 呼 -P 内 )*S1), that is, the force of atmospheric pressure pushing piston 4 is greater than the force pushing valve stem 2, so the component moves toward the negative pressure chamber 14 and the valve opens. At the same time, the driving force must be greater than the spring force, that is, F2-F1>F 弹簧 , which is determined by the area difference S1 and S2. It can be expressed by the formula:

[0034] After the vacuum pump is started: (P 呼 >P 内 =P 负 )

[0035] The force of the pressure in the breathing chamber pushing the valve stem to move: F1 = (P 呼 -P 内 )×S1

[0036] The force of the pressure in the breathing chamber pushing the piston to move: F2 = (P 呼 -P 负 )×S2

[0037] The force of the spring pushing the piston to move: F 弹

[0038] Then: F1-F2>f 弹 When, that is: (P 呼 -P 内 )×(S2-S1)>F 弹簧

[0039] The valve is open.

[0040] After the vacuum pump is turned off: (P 呼 =P 内 =P 负 )

[0041] Then: F1=F2=0<F 弹 , at this time the valve is closed under the action of the spring.

[0042] In order to further optimize the above technical solution, the valve body 1 is provided with a valve seat 15 , and the valve plate 3 abuts against the valve seat 15 .

[0043] In order to further optimize the above technical solution, air holes 16 are opened on the side walls of the breathing cavity 13 .

[0044] In order to further optimize the above technical solution, an air pipe 7 is connected between the negative pressure chamber 14 and the sewage outlet 12 .

[0045] Working principle of vacuum drain valve:

[0046] When the system is in a normal pressure state, the spring is in a natural state, the valve plate 3 fits tightly against the valve seat 15, and the valve is closed; when the vacuum pump 9 at the sewage outlet 12 is turned on, the vacuum pump 9 provides a vacuum negative pressure, the piston 4 compresses the spring, the valve plate 3 separates from the valve seat 15, and the valve automatically opens.

[0047] Embodiment 2:

[0048] The automatic sewage discharge device for high-speed railways includes a vacuum sewage discharge valve 016, and also includes: a sewage tank 8, a vacuum pump 9, an electric telescopic tube 10 and a controller 015; the sewage tank 8, the vacuum pump 9, and the electric telescopic tube 10 are connected in sequence through a sewage discharge pipe 011; the vacuum sewage discharge valve 016 is connected to the sewage discharge pipe 011 between the sewage tank 8 and the vacuum pump 9; the telescopic end of the electric telescopic tube 10 is connected to the sewage pipe 012; the controller 015 is connected to the vacuum pump 9 and the electric telescopic tube 10, and sends instructions to the vacuum pump 9 and the electric telescopic tube 10.

[0049] In order to further optimize the above technical solution, a liquid level sensor 013 is provided at the bottom of the sewage tank 8 , and the liquid level sensor 013 is connected to the controller 015 .

[0050] In order to further optimize the above technical solution, the sewage discharge device also includes a fault feedback module 014, which receives signals sent by the liquid level sensor 013, the vacuum pump 9, and the electric telescopic tube 10, and feeds back the signals to the controller 015.

[0051] In order to further optimize the above technical solution, a displacement feedback module is provided at the electric telescopic tube 10, and the displacement feedback module transmits the moving distance of the electric telescopic tube 10 to the controller 015. The electric telescopic tube 10 is provided on the body of the train, so as to be connected with the sewage pipe 012 of the station through telescopic operation.

[0052] In order to further optimize the above technical solution, the controller 015 is arranged in the driving control room.

[0053] Working principle of sewage discharge device:

[0054] After the train arrives at the station and stops at the designated position, the controller 015 in the driving control room sends a start signal. After receiving the signal, the electric telescopic tube 10 automatically extends and inserts into the sewage pipe 012 of the station; after the electric telescopic tube 10 is extended to the right position, its displacement feedback module sends a signal to the controller 015, and the controller 015 controls the vacuum pump 9 to start. After the vacuum pump 9 is started, a negative pressure is generated between the sewage tank 8 and the vacuum drain valve. Under the action of the negative pressure, the vacuum drain valve 016 automatically opens, and the sewage in the sewage tank 8 is discharged into the sewage pipe 012 of the station through the drain pipe 011; the liquid level in the sewage tank 8 drops, and the liquid level sensor 013 detects the liquid level change. When the sewage is emptied, the liquid level sensor 013 sends a signal to the controller 015, and the controller 015 controls the vacuum pump 9 to turn off. After the vacuum pump 9 is turned off, the vacuum drain valve 016 automatically closes under the action of the spring and restores the sealing state; the electric telescopic tube 10 automatically shrinks after receiving the signal and returns to the initial position.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Automatic vacuum drain valve for high-speed rail, characterized by: include: A valve body, wherein the valve body is provided with a sewage suction port and a sewage discharge port; a sealing partition is arranged in the inner cavity of the valve body, and the sealing partition divides the inner cavity of the valve body into a sewage discharge cavity and a working cavity; A valve stem, with valve plates and pistons connected at both ends of the valve stem, and the valve plates and pistons are respectively arranged at both ends of the valve stem; the valve plate abuts against the inner wall of the valve body, and the valve plate is used to connect or isolate the sewage suction port and the sewage discharge port; the piston is placed in the working chamber, and the piston moves in the working chamber and divides the working chamber into a breathing chamber and a negative pressure chamber, the breathing chamber is connected to the external atmosphere, and the negative pressure chamber is connected to the sewage discharge port; an elastic member is arranged in the negative pressure chamber, and the two ends of the elastic member are respectively connected to the piston and the inner wall of the negative pressure chamber.

2. The automatic vacuum drain valve for high-speed railway according to claim 1, characterized in that: The valve body is provided with a valve seat, and the valve plate abuts against the valve seat.

3. The automatic vacuum drain valve for high-speed railway according to claim 2, characterized in that: Air holes are provided on the side walls of the breathing cavity.

4. The automatic vacuum drain valve for high-speed railway according to claim 1, characterized in that: An air pipe is connected between the negative pressure chamber and the sewage outlet.

5. Automatic sewage discharge device for high-speed railway, characterized in that: The vacuum sewage valve comprises the vacuum sewage valve as described in any one of claims 1 to 4, and further comprises: a sewage tank, a vacuum pump, an electric telescopic tube and a controller; the sewage tank, the vacuum pump and the electric telescopic tube are connected in sequence through a sewage pipe; the vacuum sewage valve is connected to the sewage pipe between the sewage tank and the vacuum pump; the telescopic end of the electric telescopic tube is connected to the sewage pipe; the controller is connected to the vacuum pump and the electric telescopic tube, and sends instructions to the vacuum pump and the electric telescopic tube.

6. The automatic sewage discharge device for high-speed railway according to claim 5, characterized in that: A liquid level sensor is arranged at the bottom of the sewage tank, and the liquid level sensor is connected to the controller.

7. The automatic sewage discharge device for high-speed railway according to claim 6, characterized in that: The sewage discharge device also includes a fault feedback module, which receives signals sent by the liquid level sensor, the vacuum pump, and the electric telescopic tube, and feeds back the signals to the controller.

8. The automatic sewage discharge device for high-speed railway according to claim 5, characterized in that: The controller is arranged in the main control room.

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