CN113525440A - Vacuum excrement collecting system for train, diaphragm valve and control method - Google Patents

Abstract

The invention relates to a vacuum excrement collecting system for a train, a diaphragm valve and a control method. The invention only depends on gravity to discharge the wastewater into the transfer box and the sewage box, utilizes the diaphragm valve with a mechanical structure to realize the on-off of the wastewater discharge pipe, does not need to establish vacuum in the transfer box when the wastewater is discharged into the transfer box, has simple integral structure and low cost, is beneficial to simplifying a control mode, greatly improves the working reliability, and simultaneously reduces the power consumption and the air consumption of the system.

Description

Vacuum excrement collecting system for train, diaphragm valve and control method

Technical Field

The invention relates to a vacuum excrement collecting system for a train, in particular to a vacuum excrement collecting system for the train, which discharges sewage by using gravity, a diaphragm valve installed in the system and a control method of the system, and belongs to the technical field of railway vehicle manufacturing.

Background

In recent years, domestic high-speed rail cars and the like are all provided with vacuum excrement collecting systems for collecting sewage and wash wastewater of toilet stools, wherein the vacuum excrement collecting system with the largest equipment amount is a transfer type vacuum excrement collecting system. The transfer type vacuum excrement collecting system has the characteristics of low energy consumption, short waiting time for using a plurality of excrement collectors and the like. The transfer type vacuum excrement collecting system also has the defects of too many control parts, more fault points, low cost performance of the system and the like. Meanwhile, the transfer type vacuum excrement collecting system in the prior art transfers the sewage by adopting positive pressure, so that the back-spraying fault can occur when the reliability of the components is reduced, and the use of a sanitary system is seriously influenced.

The patent No. 201822272624.5 discloses a vacuum excrement collecting system for train, which installs a transfer box above a sewage box, and the lower part of the transfer box is connected with the sewage box through a large-caliber discharge valve, and the vacuum sewage suction gravity sewage discharge mode is adopted. However, the biggest difficulty of the system is the large-caliber drain valve, and the current commonly used slide valve and butterfly valve have the problems of small caliber, complex structure, inconvenient daily maintenance, poor reliability and the like, and can not be applied to the excrement collecting system for draining sewage by depending on gravity.

In addition, in the vacuum excrement collecting system for the train, a waste water tank is arranged besides the transfer tank and the sewage tank and is used for collecting washing waste water flowing out of a hand basin and a floor drain, when the waste water tank reaches a certain liquid level, vacuum is built in the transfer tank, and a waste water discharge valve on a waste water tank drain pipe is opened to discharge the waste water in the waste water tank into the transfer tank. The system structure has certain disadvantages: firstly, the system structure is complex and the cost is high; secondly, when the waste water tank is discharged into the transfer tank, vacuum needs to be established in the transfer tank, and meanwhile, the waste water drainage valve is a pneumatic electromagnetic valve, so that the control mode and the control structure are complex, the load of a control circuit can be increased, the power consumption of a system is improved, and the gas consumption can be increased.

Disclosure of Invention

The invention mainly solves the technical problem of providing a vacuum excrement collecting system for a train, which has simple structure and low cost and can greatly improve the working reliability, and also provides a control method of the system.

The invention mainly solves the technical problem of providing the diaphragm valve which has simple structure, low cost and good manufacturability and can realize the on-off of the pipeline only according to the pressure change.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a train is with vacuum collection just system, includes stool pot, waste water discharging equipment, transfer case, filth case and vacuum generator, the stool pot passes through the blow off pipe and is connected with the transfer case, and vacuum generator passes through the trachea and is connected with the transfer case, waste water discharging equipment passes through the drain pipe and is connected with the transfer case the diaphragm valve has concatenated on the drain pipe, and waste water passes through the diaphragm valve flows into in the transfer case according to gravity.

Furthermore, a liquid level switch is arranged on the transfer box.

Further, the transfer box is communicated with the sewage box through a communication opening, a transfer box blow-down valve used for controlling the on-off of the communication opening is installed at the communication opening, and sewage in the transfer box is discharged into the sewage box through gravity.

Furthermore, the transfer box blow-off valve is a plug valve or a diaphragm valve.

The other technical scheme of the invention is as follows:

the utility model provides a diaphragm valve, includes the valve body install the diaphragm in the valve body, the diaphragm divides into two chambeies in with the valve body, is provided with the blow vent on the valve body in first chamber, and the second chamber is connected with inhalant canal and drainage channel, according to the pressure differential between first chamber and the second chamber the diaphragm is optionally sealed or breaks away from inhalant canal and drainage channel's linking department and is cut off or communicate the water flow path between inhalant canal and the drainage channel.

Further, an annular boss is arranged on the surface of one side of the diaphragm corresponding to the outlet of the water inlet channel, and the annular boss is attached to or separated from the outlet of the water inlet channel so as to cut off or communicate a water flow path between the water inlet channel and the drainage channel.

Further, the diaphragm is vertically installed in the valve body, the water inlet channel is vertically arranged above the drainage channel, the inlet end of the drainage channel is located below the outlet end of the water inlet channel, the diaphragm is selectively attached to or separated from the outlet end of the water inlet channel, and a snake-shaped water flow path is formed between the inlet of the water inlet channel and the outlet of the drainage channel.

Further, a limiting boss for limiting the maximum deformation amount is arranged on the surface of the diaphragm facing to the side of the first cavity.

Further, the vent passes through trachea and car in-connection, the entry of water intake passage and drainage channel's export are connected with waste water discharging equipment and the transfer case in the car through the water pipe respectively.

The invention also adopts the technical scheme that:

a control method of the vacuum excrement collecting system for the train is characterized by comprising the following steps:

s1, when the toilet is in standby, when the wastewater discharged by the wastewater discharge equipment flows into the transfer tank to a set liquid level through the diaphragm valve according to the gravity, the controller controls the drain valve of the transfer tank to be opened, and the wastewater is discharged into the sewage tank according to the gravity;

s2, when the toilet is used, after the flushing button is pressed, the transfer box blow-down valve is opened to empty the transfer box, and the water pressurizing unit flushes the toilet for the first time;

s3, closing a blowdown valve of the transfer box after the blowdown valve of the transfer box is opened for a designed time, establishing vacuum for the transfer box by the vacuum generator, and opening a blowdown valve of a toilet stool to suck dirt into the transfer box after the vacuum is established;

s4, closing a toilet stool blow-down valve, opening a transfer box blow-down valve, and discharging dirt in the transfer box into a dirt box according to gravity;

and S5, the water pressurizing unit performs secondary flushing on the toilet to form water seal, and the toilet waits.

In summary, compared with the prior art, the vacuum excrement collecting system for the train, the diaphragm valve and the control method provided by the invention have the following advantages:

(1) this system only relies on gravity to arrange waste water to transfer case and filth incasement, utilizes mechanical structure's diaphragm valve to realize waste water drain pipe's break-make, need not to establish the vacuum in the transfer case when waste water discharges to the transfer case, and this system overall structure is simple, and is with low costs, is favorable to simplifying control mode, promotes operational reliability by a wide margin, also reduces the power consumption and the gas consumption of system simultaneously.

(2) The communicating opening between the transfer box and the sewage box of the system replaces a sliding plate valve in the prior art through a plug valve or a diaphragm valve, so that the gravity sewage discharge is more stable and reliable, and the maintenance cost is favorably reduced. Meanwhile, the transfer box is directly connected with the sewage box, so that structures such as a drain valve and the like which are arranged between the transfer box and the sewage box in the prior art are omitted, and the total height occupied by the transfer box and the sewage box is reduced.

(3) The diaphragm valve provided by the invention has the advantages of simple structure, low processing and manufacturing cost, good manufacturability and stable and reliable work.

Drawings

FIG. 1 is a schematic view of a vacuum feces collection system according to an embodiment of the present invention (communication port closed state);

FIG. 2 is a view of a diaphragm valve of the present invention;

FIG. 3 is a schematic structural view of a vacuum feces collection system according to an embodiment of the present invention (with the communication port open);

FIG. 4 is a schematic structural diagram of a second transfer box according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of a third transfer box according to an embodiment of the present invention (in a state where a communication port is opened);

fig. 6 is a schematic structural view of a third transfer box according to the embodiment of the present invention (in a state where the communication port is closed);

fig. 7 is a schematic structural view of a fourth transfer box according to an embodiment of the present invention (in a state where a communication port is closed);

as shown in fig. 1 to 7, a transfer case 1, a bottom plate 1a, a top plate 1b, a surrounding plate 1c, a dirt case 2, a top plate 2a, a toilet 3, a vacuum generator 4, a hand basin 5, a toilet blow-off valve 6, a drain pipe 7, a diaphragm valve 8, a check valve 9, a communication port 10, a transfer case blow-off valve 11, a liquid level switch 12, a valve body 13, a first cavity 13a, a second cavity 13b, a diaphragm 14, a water inlet channel 15, a drain channel 16, a vent hole 17, an annular boss 18, a limit boss 19, a driving mechanism 20, a valve plug 21, a cover plate 22, a guide cylinder 23, a concave portion 24, an access door 25, a second opening 26, a valve plug cavity 27, a fixed seat 28, a diaphragm 29, a valve body 30 and a fixed point 31.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

the first embodiment is as follows:

as shown in fig. 1 to 3, the present embodiment provides a vacuum feces collection system for a train, which includes a transfer box 1, a waste tank 2, a toilet 3, a waste water discharge device, a vacuum generator 4, a pneumatic control unit, an electrical control unit, a water pressurization unit, a flushing button, and the like, wherein the waste water discharge device includes a wash basin 5, a wash basin, an electric tea stove water outlet, a floor drain, and the like, which are mounted on the train.

In this embodiment, the top of filth case 2 is arranged in to transfer case 1, and stool pot 3 is connected with transfer case 1 through the blow off pipe, has concatenated stool pot blowoff valve 6 on the blow off pipe, and waste water discharging equipment such as wash-basin 5 passes through drain pipe 7 and is connected with transfer case 1, has concatenated diaphragm valve 8 on drain pipe 7, and diaphragm valve 8 can integrated the installation on transfer case 1, makes the structure compacter. One-way valves 9 are arranged below the hand washing basin 5, the wash basin, the electric tea stove water outlet and the floor drain, and the one-way valves 9 preferably adopt anti-smell-return one-way valves in the structural forms of duckbills, cross diaphragms and the like. Wastewater discharged by wastewater discharge equipment such as a hand basin 5 is discharged into the lower transfer box 1 according to gravity. The bottom plate 1a of the transfer box 1 is communicated with the top plate 2a of the sewage tank 2 through a communication opening 10, a transfer box blow-down valve 11 for controlling the communication opening 10 to be opened and closed is installed at the communication opening 10, and sewage, waste water and the like entering the transfer box 1 are discharged into the sewage tank 2 below through the action of gravity. The vacuum generator 4 is connected with the transfer box 1 through an air pipe, a liquid level switch 12 is installed on the transfer box 1, and the vacuum generator 4 and the liquid level switch 12 are connected with the controller.

As shown in fig. 2, the diaphragm valve 8 includes a valve body 13, and the valve body 13 is preferably made of plastic to reduce weight and cost. A diaphragm 14 is arranged in the valve body 13, the diaphragm 14 divides the interior of the valve body 13 into two diaphragm cavities, a vent hole 17 is arranged on the valve body 13 of the left first cavity 13a, the vent hole 17 is communicated with the interior of the vehicle through an air pipe, and the vent hole communicated with the interior of the vehicle can be arranged in a toilet or beside the hand basin 5. The second chamber 13b on the right side is connected with a water inlet channel 15 and a water drainage channel 16, and the inlet of the water inlet channel 15 and the outlet of the water drainage channel 16 are respectively connected with waste water discharge equipment such as a hand basin 5 in the vehicle and the transfer box 1 through a water drainage pipe 7. The diaphragm 14 selectively closes or disengages the junction of the water inlet channel 15 and the water outlet channel 16 to cut off or communicate the water flow path between the water inlet channel 15 and the water outlet channel 16 according to the pressure difference between the first chamber 13a and the second chamber 13 b. In this embodiment, valve body 13 falls into two parts of detachable for convenient maintenance, and the clamp fixed connection that sets up through the outer lane between two parts compresses tightly diaphragm 14 when two parts are connected on fixed valve body 13. Of course, the two parts of the valve body 13 can also be fixedly connected by a screw thread, and the two parts are screwed to press the diaphragm 14 onto the valve body 13.

In this embodiment, the diaphragm 14 is disc-shaped and vertically installed in the valve body 13, the water inlet channel 15 is vertically disposed above the water outlet channel 16, the inlet end of the water outlet channel 16 is located below the outlet end of the water inlet channel 15, the diaphragm 14 is selectively attached to or detached from the outlet end of the water inlet channel 15, and a serpentine water flow path is formed between the inlet of the water inlet channel 15 and the outlet of the water outlet channel 16. An annular boss 18 is provided on one side surface of the diaphragm 14 corresponding to an outlet of the water inlet passage 18, the annular boss 18 is integrally formed with the body of the diaphragm 14, and the annular boss 18 is attached to or detached from the outlet of the water inlet passage 15 to cut off or communicate the water flow path.

The surface of the diaphragm 14 on the side facing the first cavity 13a is provided with a limiting boss 19 for limiting the maximum deformation, so that the diaphragm 14 is prevented from being deformed too much and damaged due to the excessive waste water pressure in the drain pipe 7.

The air vent 17 and the water inlet channel 15 in the diaphragm valve 8 are communicated with the vehicle, and the pressure on both sides of the diaphragm 14 is kept balanced. The diaphragm 14 is used to seal the inlet of the water inlet passage 15 and the outlet of the water discharge passage 16, and prevent air from being ventilated when the pressure inside and outside the vehicle is different. Through the elastic selection of the material of the diaphragm 14, the water inlet side pressure can be separated from the communicated water path only when being larger than the set value of the air-vent side pressure, and the sealing can be better realized under other working conditions. In this embodiment, the diaphragm 14 is preferably made of a silicone rubber material, and the elastic pressure of the diaphragm is selected to be 6kPa to 12kPa, so that the pressure difference between the inside and the outside of the vehicle is isolated, and the grey water in the vehicle flows into the transfer box through the accumulated gravity water column gram sealing membrane.

When a passenger uses the toilet stool 3 and the transfer case 1 is vacuumized, the annular boss 18 of the diaphragm valve 8 is adsorbed at the outlet of the water inlet channel 15, and the transfer case 1 forms a sealed space. When the water volume of the wastewater flowing out of the hand basin 5 is small, the wastewater is temporarily stored in the drain pipe 7, when the water volume in the drain pipe 7 reaches a certain pressure, the pressure of the water inlet side of the diaphragm 14 is larger than the pressure of the air vent side, and the elasticity of the diaphragm 14 can be overcome, the diaphragm 14 is pushed away and separated from the water inlet channel 15, and the wastewater in the drain pipe 7 flows into the transfer box 1 through the diaphragm valve 8 according to the gravity.

This system only relies on gravity to arrange waste water to transfer case 1 in, utilizes diaphragm valve 8 of mechanical structure to realize waste water drain pipe's break-make, need not to establish the vacuum in transfer case 1 when waste water discharges to transfer case 1, is favorable to simplifying system architecture, and reduce cost is favorable to simplifying the control mode moreover, promotes the operational reliability by a wide margin, also reduces the power consumption and the gas consumption of system simultaneously.

In this embodiment, as shown in fig. 1 and 3, the communication opening 10 provided between the transfer box 1 and the waste box 2 is formed by abutting an opening provided on a bottom plate 1a of the transfer box 1 and an opening provided on a top plate 2a of the waste box 2, and the transfer box 1 and the waste box 2 are fixedly connected together at the corresponding openings by fastening devices such as flanges, which facilitates the routine maintenance and repair. In order to ensure the tightness of the communication opening 10, a ring of sealing ring (not shown in the figure) is installed at the opening where the transfer box 1 and the sewage tank 2 are butted. The direct connection between the transfer case 1 and the sewage tank 2 omits the structures such as a blowoff valve and the like which are arranged between the transfer case 1 and the sewage tank 2 in the prior art, and reduces the total height occupied by the transfer case 1 and the sewage tank 2. Because the transfer case 1 is arranged on the sewage tank 2, a plurality of toilets and waste water of the train can be collected by the same transfer case 1, so that components are saved, and the efficient use and low energy consumption of the toilet 3 are realized.

As shown in fig. 1 and 3, the transfer box 1 is a box-shaped structure composed of a bottom plate 1a, a top plate 1b and a surrounding plate 1c, the top plate 1b of the transfer box 1 is a flat plate structure, the top plate 1b may be one of a circle, a square, a semicircle, an ellipse and a sector, and one of the structures of the transfer box 1 may be selected according to an actual installation space. Of course, the transfer box 1 can also adopt other special-shaped structures. The end of a drain pipe of the toilet stool 3 is connected to the enclosing plate 1c of the transfer box 1, a drain pipe of the waste water box is also connected to the enclosing plate 1c of the transfer box 1, and the end of an exhaust pipe of the vacuum generator 4 is connected to the top plate 1b of the transfer box 1. An access door (not shown) for accessing the transfer case 1 is provided on the shroud 1 c.

The bottom plate 1a of transfer case 1 is the bellied toper structure downwards, and intercommunication mouth 10 sets up in toper structure bottommost position, and this structure is favorable to making the filth that gets into in the transfer case 1 flow to the intercommunication mouth 10 department at bottom center, and then is favorable to making in the filth box 2 of the interior filth of transfer case 1 all arrange to the below through the action of gravity.

In this embodiment, the transfer box blowdown valve 11 is preferably a plug valve, the plug valve includes a driving mechanism 20 and a valve plug 21, an output end of the driving mechanism 20 is connected with the valve plug 21, and a moving direction of the valve plug 21 is perpendicular to a plane where the communication port 10 is located. The connection between the output end of the drive mechanism 20 and the valve plug 21 may be a flanged connection or a threaded connection to facilitate routine maintenance. The valve plug 21 is driven by the driving mechanism 20 to block the communication port 10 to open the communication port 10 when the transfer box 1 sucks dirt in vacuum, or to separate from the communication port 10 to open the communication port 10 when the transfer box 1 discharges dirt to the dirt box 2.

The driving mechanism 20 may be an air cylinder, a hydraulic cylinder, or a motor, as long as the driving mechanism can drive the valve plug 21 to make a linear motion, and the driving mechanism 20 is installed outside the transfer box 1. The driving mechanism 20 is connected with an electric control unit or an air control unit in the excrement collecting system.

A first opening (not shown) is formed in the top plate 1b of the transfer box 1, and the driving mechanism 20 is fixed on the top plate 1b at the first opening through a first sealing and fixing structure, in this embodiment, the first sealing and fixing structure preferably employs a cover plate 22, the diameter of the cover plate 22 is larger than that of the first opening, the cover plate 22 is fixedly installed on the top plate 1b through bolts, the driving mechanism 20 is fixedly installed on the cover plate 22, and the output end of the driving mechanism 20 passes through the cover plate 22 and the first opening and is fixedly connected with the valve plug 21. In order to ensure the tightness of the first opening, a ring of sealing gasket (not shown) is disposed between the cover plate 22 and the top plate 1b to prevent leakage when the transfer box 1 is evacuated.

In this embodiment, no matter in the shutoff state or in the open mode, valve plug 21 all removes in transfer case 1, and the diameter of first open-ended can be with the diameter phase-match of actuating mechanism 20's output, is far less than valve plug 21's diameter, and valve plug 21 can carry out routine maintenance and repair through the access door of one side. In this embodiment, in order to facilitate the routine maintenance and repair of the valve plug 21, it is preferable that the diameter of the first opening is matched with the diameter of the valve plug 21, so that the valve plug 21 can be taken out from the first opening only by opening the upper cover plate 22 during the maintenance and repair.

In order to ensure that the valve plug 21 moves more smoothly, in this embodiment, it is more preferable that a guide cylinder 23 having a cylindrical shape is protruded toward the interior of the transfer case 1 at the first opening, the inner diameter of the guide cylinder 23 is the same as the inner diameter of the first opening, and the guide cylinder 23 is an equal-diameter cylinder, and the valve plug 21 moves linearly in the guide cylinder 23. The height of the guide cylinder 23 ensures that at least a part of the valve plug 21 remains in the guide cylinder 23 in the closed position.

When the diameter of first open-ended and valve plug 21 matches, the peripheral surface of valve plug 21 contacts with the section of thick bamboo wall of first open-ended inner circle or guide cylinder 23 when removing, when valve plug 21 rebound, can utilize the section of thick bamboo wall of guide cylinder 23 to scrape the filth of adhesion on the valve plug 21, and the filth drops in transfer case 1, plays the effect of automatically cleaning to valve plug 21, is favorable to further reducing the routine maintenance cost.

The valve plug 21 may be made of metal material, or hard rubber, nylon, plastic, etc. The bottom of the valve plug 21 is in a frustum-shaped structure converging towards the center, and the communication port 10 is matched with the bottom of the valve plug 21 to form a frustum-shaped structure with a large top and a small bottom so as to ensure the sealing performance during plugging. For the convenience of manufacture, the opening of the top plate 2a of the sewage tank 2 is of a flat structure, and the opening of the transfer tank 1 is provided with a frustum-shaped structure extending towards the direction of the sewage tank 2.

The bottom plane of the valve plug 21 is located below the communication port 10 in the plugging state, so that when the valve plug 21 moves towards the communication port 10, dirt adhered to the communication port 10 can be pushed into the dirt box 2 below, and reliable sealing in the plugging state is guaranteed.

The transfer box blow-off valve 11 can complete the connection or disconnection of the communicating port 10 through the simple up-and-down linear motion of the valve plug 21, has simple integral structure and simple control, can not limit the caliber of the communicating port 10, and utilizes the plug valve to replace a sliding plate valve in the prior art, so that the gravity blow-off is more stable and reliable, and the maintenance cost is favorably reduced.

The plug valve is normally closed, when a passenger uses the toilet 3, the vacuum generator 4 works to vacuumize the transfer tank 1, when the vacuum degree reaches a set value of the vacuum switch, the vacuum generator 4 stops working, the toilet blow-off valve 19 is opened, dirt is sucked into the transfer tank 1 under the action of negative pressure, the toilet blow-off valve 19 is closed, the valve plug 21 is controlled to move upwards to open the communication opening 10, and the dirt in the transfer tank 1 is discharged into the dirt tank 2 under the action of gravity. The sewage transfer process in the transfer box 1 is completely free of positive pressure by using gravity sewage discharge, and the problem that the reverse spraying of the toilet stool 3 is caused when parts are broken down due to the fact that the sewage is transferred by the original transfer box 1 with the same low energy consumption through positive pressure is solved.

The control method of the vacuum excrement collecting system comprises the following steps:

s1, when the toilet is standby, the wastewater discharged by the wastewater discharge device flows into the transfer box 1 to a set liquid level through the diaphragm valve 8 according to the gravity, the controller controls the drain valve 11 of the transfer box to be opened, and the wastewater is discharged into the sewage box 2 according to the gravity.

S2, when the toilet 3 is used, after the flushing button is pressed, the transfer box blow-down valve 11 is firstly opened to empty the transfer box 1, and the water pressurizing unit flushes the toilet 3 for the first time. This step is advantageous for increasing the volume of the transfer box 1 evacuated.

And S3, closing the blowdown valve 11 of the transfer box after the valve is opened for a designed time, enabling the vacuum generator to work to establish vacuum for the transfer box, enabling the vacuum switch to be switched on or stopping the vacuum-building working time for a set time, and opening the blowdown valve 6 of the toilet stool to suck dirt into the transfer box 1 after the vacuum-building working time is set.

S4, the toilet stool blow-off valve 6 is closed, the transfer box blow-off valve 11 is opened, and the dirt in the transfer box 1 is discharged into the dirt box 2 according to the gravity. In this step, the transfer case 1 may be emptied once after the toilet 3 is used once, or may be emptied once after the toilet 3 is used many times.

S5, the water pressurizing unit performs a second flush of the toilet 3 to form a water seal, and the toilet waits.

The system adopts the technologies of sewage vacuum collection, wastewater gravity collection, transfer box gravity emptying and the like, continues the advantages of low gas consumption, multiple toilets and simultaneous collection of ash and water in the original transfer mode, and solves the problems of complex structure, more fault points, reverse spraying risk of the transfer box and the like in the original wastewater collection. The system has the advantages of simple structure, stable and reliable work, easy manufacture and maintenance and obvious integral falling effect.

Example two:

as shown in fig. 4, the top plate 1b of the rotary box 1 is a flat plate structure, the top plate 1b may be one of a circular, square, semicircular, oval and fan shape, and the top plate 1b shown in fig. 3 has a semicircular structure, which is different from the first embodiment in that in the present embodiment, the top plate 1b has a downward concave portion, the position of the concave portion 24 is not limited as long as the concave portion is disposed opposite to the communication port 10, and the driving mechanism 20 is mounted on the top plate 1b in the concave portion 24. The provision of the recessed portion 24 in the top plate 1b facilitates further reduction in the installation height of the drive mechanism 20 while ensuring the capacity of the transfer case 1, and also facilitates shortening of the stroke of the valve plug 21.

The bottom plate 1a of the transfer case 1 is also of a downwardly convex conical structure, and the communication port 10 is provided at the center of the bottommost portion of the conical structure. An access door 25 for accessing the transfer case 1 is provided on the shroud 1 c.

Example three:

as shown in fig. 5 and 6, the difference from the first or second embodiment is that in the present embodiment, a second opening 26 is provided in the top plate 1b of the transfer case 1, a closed valve plug cavity 27 is provided above the second opening 26, and the valve plug 21 extends into the interior of the transfer case 1 in the closed state and is accommodated in the valve plug cavity 27 in the open state in a manner of moving upward. Actuating mechanism 20 fixes on the casing in valve plug chamber 27, and valve plug chamber 27 passes through the sealed fixed knot of second and constructs and the roof 1b fixed connection of transfer case 1, and the sealed fixed knot of second constructs for annular fixing base 28, sets up the sealing washer between fixing base 28 and the roof 1b and realizes sealing connection.

In this structure, the diameter of second opening 26 and valve plug 21's diameter phase-match, the peripheral surface of valve plug 21 contacts with the inner circle of second opening 26 when removing, when valve plug 21 rebound, can utilize the inner circle of second opening 26 to scrape the filth of adhesion on the valve plug 21, and the filth drops in transfer case 1, plays the effect of automatically cleaning to valve plug 21, is favorable to further reducing the routine maintenance cost.

Example four:

the difference from the first, second and third embodiments is that the diameter of the guide cylinder 23 and the second opening 26 is slightly larger than the diameter of the valve plug 21, and a plurality of flexible blades (not shown) are arranged on the cylinder wall of the guide cylinder 23 or the second opening 26, and the flexible blades may be uniformly arranged along the circumferential direction or may be arranged in a ring shape. The peripheral surface of flexible doctor blade and valve plug 21 contacts when removing, utilizes flexible doctor blade to scrape the filth of adhesion on the valve plug 21, and the filth drops in transfer case 1, plays the effect of automatically cleaning to valve plug 21.

Example five:

under the special conditions such as vehicle fault, face that the passenger is stranded in the train carriage temporarily, the train can have a power failure under the harsher condition, the gas break, cause the vacuum excrement collector with lavatory to work, in order to solve the emergent usable problem of this special condition's stool pot 3, alleviate temporary trapping passenger's difficulty like the lavatory, as shown in figure 7, in this embodiment, the valve that is used for controlling the intercommunication mouth 10 break-make between transfer case 1 and filth case 2 adopts the structure and controls simpler diaphragm valve.

The diaphragm valve comprises a diaphragm 29 and a valve body 30, wherein the valve body 30 is of a cylindrical structure extending towards the inner direction of the sewage tank 2 at the communication opening 10, the bottom surface of the valve body 30 is a conical surface with a certain inclination angle, the diaphragm 29 is installed on the bottom surface of the valve body 30, and the diaphragm 29 is connected with the higher end of the valve body 30 through a fixing point 31. In the present embodiment, it is preferable that the bottom of the valve body 30 is inclined downward from the position of the communication port 10, and the fixing point of the diaphragm 29 is provided on the top plate 2a of the dirt tank 2 at the communication port 10.

The diaphragm 29 is made by the material that has certain shaping hardness, this material has certain elasticity simultaneously, when no filth discharges, the valve body 30 can be shutoff by the hardness that self material is relied on to diaphragm 29, and then shutoff intercommunication mouth 10, when the transfer case 1 in gets into the filth, the filth at first gets into in the valve body 30, the weight of filth can make diaphragm 29 pressurized deformation and downward sloping this moment, and then open intercommunication mouth 10, make the filth get into in the filth case 2, after the blowdown, good weight disappears the back, diaphragm 29 again can automatic recovery to the shutoff state. The angle of inclination of the membrane 29 in the closed state is preferably between 20 and 70 °, more preferably between 30 and 45 °, depending on the material chosen for the membrane 29.

The present embodiment also provides a vacuum feces collection system for a train, and the structure and the working principle of the vacuum feces collection system are the same as above, and are not described in detail herein.

The difference is that in this embodiment, the toilet blowoff valve 6 is a pinch valve, when the vehicle is running normally, the pinch valve of the toilet 3 is in a closed state, when the toilet 3 is used by the passenger, the vacuum generator 4 works to vacuumize the transfer box 1, at this time, the diaphragm 29 of the diaphragm valve at the communication port 10 of the transfer box 1 is adsorbed on the conical valve body 30 to form a seal under the condition of negative pressure, when the vacuum degree reaches the set value of the vacuum switch, the vacuum generator 4 stops working, the pinch valve is opened, the dirt is sucked into the transfer box 1 under the action of the negative pressure, the pinch valve is closed, and the dirt presses the diaphragm 29 of the diaphragm valve to fall into the dirt box 2 under the action of gravity.

When the train has the situation of no electricity and no air, the pipe clamp valve is automatically in the open state under the situation of no air, at the moment, when passengers use the toilet 3, dirt flows into the transfer box 1 along the opened pipe clamp valve, the dirt in the transfer box 1 flows into the diaphragm valve below through the conical structure at the bottom of the transfer box 1, and the diaphragm 29 of the diaphragm valve is pressed open under the action of gravity to fall into the dirt box 2. The passenger emergency use under the working condition that no air or electricity exists is solved, the diaphragm 29 of the diaphragm valve is sealed by the diaphragm forming hardness and the conical valve body at ordinary times, peculiar smell in the sewage tank 2 can be effectively prevented from entering the carriage, and the comfort level of the environment in the carriage is guaranteed to a certain extent.

Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. Vacuum collection just system for train, including stool pot, waste water discharging equipment, transfer case, filth case and vacuum generator, the stool pot passes through the blow off pipe and is connected with the transfer case, and vacuum generator passes through the trachea and is connected its characterized in that with the transfer case: the waste water discharge equipment is connected with the transfer box through a drain pipe, a diaphragm valve is connected to the drain pipe in series, and waste water flows into the transfer box through the diaphragm valve according to gravity.

2. The vacuum excrement collecting system for the train as claimed in claim 1, wherein: and a liquid level switch is arranged on the transfer box.

3. The vacuum excrement collecting system for trains according to claim 1 or 2, wherein: the transfer box is communicated with the sewage box through a communication opening, a transfer box blow-down valve used for controlling the on-off of the communication opening is installed at the communication opening, and sewage in the transfer box is discharged into the sewage box through gravity.

4. The vacuum excrement collecting system for the train as claimed in claim 3, wherein: the transfer box blow-off valve is a plug valve or a diaphragm valve.

5. A diaphragm valve, characterized in that: including the valve body install the diaphragm in the valve body, the diaphragm divides into two chambeies in with the valve body, is provided with the blow vent on the valve body in first chamber, and the second chamber is connected with inhalant canal and drainage channel, according to the pressure differential between first chamber and the second chamber the diaphragm is optionally sealed or breaks away from inhalant canal and drainage channel's linking department and cuts off or communicate the rivers route between inhalant canal and the drainage channel.

6. A diaphragm valve according to claim 5, wherein: an annular boss is arranged on the surface of one side of the diaphragm corresponding to the outlet of the water inlet channel, and the annular boss is attached to or separated from the outlet of the water inlet channel so as to cut off or communicate a water flow path between the water inlet channel and the drainage channel.

7. A diaphragm valve according to claim 5 or 6, wherein: the diaphragm is installed perpendicularly in the valve body, inhalant canal arranges perpendicularly the top of drainage channel, drainage channel's entry end is located the below of inhalant canal exit end, the diaphragm optionally with inhalant canal's exit end laminating or breaking away from, form snakelike water flow path between inhalant canal's entry and drainage channel's the export.

8. A diaphragm valve according to claim 5 or 6, wherein: and a limiting boss for limiting the maximum deformation amount is arranged on the surface of the diaphragm facing to the first cavity.

9. A diaphragm valve according to claim 5 or 6, wherein: the vent hole is communicated with the inside of the vehicle through an air pipe, and the inlet of the water inlet channel and the outlet of the water drainage channel are respectively connected with a waste water discharge device and a transfer case in the vehicle through water pipes.

10. A control method of a vacuum excrement collecting system for a train as claimed in any one of claims 1 to 4, comprising the steps of:

s1, when the toilet is in standby, when the wastewater discharged by the wastewater discharge equipment flows into the transfer tank to a set liquid level through the diaphragm valve according to the gravity, the controller controls the drain valve of the transfer tank to be opened, and the wastewater is discharged into the sewage tank according to the gravity;

s2, when the toilet is used, after the flushing button is pressed, the transfer box blow-down valve is opened to empty the transfer box, and the water pressurizing unit flushes the toilet for the first time;

s3, closing a blowdown valve of the transfer box after the blowdown valve of the transfer box is opened for a designed time, establishing vacuum for the transfer box by the vacuum generator, and opening a blowdown valve of a toilet stool to suck dirt into the transfer box after the vacuum is established;

s4, closing a toilet stool blow-down valve, opening a transfer box blow-down valve, and discharging dirt in the transfer box into a dirt box according to gravity;

and S5, the water pressurizing unit performs secondary flushing on the toilet to form water seal, and the toilet waits.

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