阅读说明：本技术 真空中转式集便防反喷控制阀、集便系统及防反喷方法 (Vacuum transfer type excrement collection anti-reverse-spraying control valve, excrement collection system and anti-reverse-spraying method ) 是由 姜军 李凯 张建成 张道坤 田博 宋爱平 马永群 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种真空中转式集便防反喷控制阀、集便系统及防反喷方法,反喷控制阀,包括：阀体,中部设置有通槽,侧壁上设置有工作接口和气源接口,工作接口和气源接口均与所述通槽连通,且两者沿通槽的径向相邻设置；主阀芯,安装于所述通槽内,其形状与所述通槽相适应,且其外周加工环形凹槽；第一弹簧,安装于主阀芯一端与阀体之间,对主阀芯提供弹力,当第一弹簧处于压缩下限时,工作接口和气源接口通过所述环形凹槽连通；控制阀体,设置于所述阀体的靠近所述封头的端部,其内部中空,横截面上覆盖安装有弹性盘体结构,对真空部分进行密封,真空接口位于弹性盘体结构与封头之间,弹性盘体结构上预留延时节流孔。(The invention discloses a vacuum transfer type excrement collection and anti-reverse spraying control valve, an excrement collection system and an anti-reverse spraying method, wherein the reverse spraying control valve comprises: the valve body is provided with a through groove in the middle, a working interface and an air source interface are arranged on the side wall, the working interface and the air source interface are both communicated with the through groove, and the working interface and the air source interface are arranged adjacently along the radial direction of the through groove; the main valve core is arranged in the through groove, the shape of the main valve core is matched with that of the through groove, and an annular groove is machined on the periphery of the main valve core; the first spring is arranged between one end of the main valve core and the valve body and provides elasticity for the main valve core, and when the first spring is positioned at the lower limit of compression, the working interface and the air source interface are communicated through the annular groove; the control valve body, set up in being close to of valve body the tip of head, its inside cavity covers on the cross section and installs elasticity disk body structure, seals vacuum part, and the vacuum interface is located between elasticity disk body structure and the head, and the structural time delay orifice that reserves of elasticity disk body.)

1. The utility model provides a vacuum transfer formula collection just prevents control valve that spouts, its characterized in that: the method comprises the following steps:

the valve body is provided with a through groove in the middle, a working interface and an air source interface are arranged on the side wall, the working interface and the air source interface are both communicated with the through groove, and the working interface and the air source interface are arranged adjacently along the radial direction of the through groove;

the main valve core is arranged in the through groove, the shape of the main valve core is matched with that of the through groove, and an annular groove is machined on the periphery of the main valve core;

the first spring is arranged between one end of the main valve core and the valve body, and when the first spring is at the lower compression limit, the working interface is communicated with the air source interface through the annular groove;

the end socket is arranged at one end of the through groove, a guide groove is formed in the end socket, an iron core, a sealing block and a plug are sequentially arranged in the guide groove, a second spring is connected between the iron core and the end part of the guide groove, the plug is abutted against the main valve core, the plug is of a hollow structure, and the hollow part is communicated with the main valve core; the sealing block is arranged between the guide groove in a sealing mode, a pore passage is processed in the sealing block and is communicated with the hollow structure of the plug, and the air source interface is communicated with the interior of the guide groove through an air supply throttling pore passage;

the control valve body is arranged at the end part of the valve body close to the end socket, the interior of the control valve body is hollow, a vacuum interface is arranged on the side wall of the control valve body, and a one-way diaphragm is arranged at the vacuum interface;

an elastic disc body structure is covered and installed on the cross section of the hollow part of the control valve body, and a vacuum interface is positioned between the elastic disc body structure and the seal head;

a delay orifice is reserved on the elastic disc body structure, and one end of the elastic disc body structure, which is far away from the vacuum joint, is communicated with the outside;

the permanent magnet is arranged on the elastic disc body structure, and a set distance is reserved between the permanent magnet and the iron core;

and a third spring is arranged between the permanent magnet and the end socket.

2. The vacuum transfer type excrement collecting and reverse spraying prevention control valve according to claim 1, characterized in that: the area of the main valve core except the annular groove is hermetically arranged with the inner wall of the valve body. The leakage of high-pressure air can be effectively prevented, and the smooth operation is ensured.

3. The vacuum transfer type excrement collecting and reverse spraying prevention control valve according to claim 1, characterized in that: the elastic disc body structure is a rubber sheet and is fixed on the cross section of the control valve body through a first end cover, and a through hole is reserved in the end cover.

4. The vacuum transfer type excrement collecting and reverse spraying prevention control valve according to claim 1, characterized in that: the permanent magnets are annularly arranged.

5. The vacuum transfer type excrement collecting and reverse spraying prevention control valve according to claim 1, characterized in that: and a second end cover is arranged at one end of the valve body, which is far away from the seal head, and the first spring is connected between the second end cover and the main valve core.

6. The vacuum transfer type excrement collecting and reverse spraying prevention control valve according to claim 1, characterized in that: and a through hole is preset in the second end cover.

7. A vacuum transfer type excrement collecting system is characterized in that: the method comprises the following steps:

the anti-blowout control valve according to any one of claims 1 to 6;

the compressed air source is connected with an air source interface of the anti-back-spraying control valve through an electromagnetic valve;

the air cylinder is connected with a valve plate of a drain valve of the urinal, and an air supply pipe of the air cylinder is connected with the working interface;

and the vacuum generator is connected with the vacuum interface.

8. The vacuum transit fecal collecting system according to claim 7, characterized in that: the solenoid valve is a two-position five-way solenoid valve.

9. A vacuum transfer type excrement collection and reverse spraying prevention method is characterized in that: the method comprises the following steps:

when the system is in an initial state, the anti-reverse-spraying control valve and the drain valve are in a closed state, the two-position five-way electromagnetic valve and the vacuumizing electromagnetic valve are in a power-off state, and the vacuum generator does not work;

when a flushing button is pressed, the system starts to operate, the vacuum generator works, after 1-3s, the two-position five-way electromagnetic valve is opened, the control valve body is vacuumized, and the vacuumizing is closed after the vacuumizing is set for time;

when the vacuum degree in the control valve body reaches a set value, the anti-reverse-injection control valve is opened, compressed air enters the air cylinder, the air cylinder drives the drain valve to be opened, and dirt is transferred into the transfer box from the urinal;

after air enters the control valve body, the anti-reverse-spraying control valve is closed under the action of the spring, and the transfer process of the sewage from the urinal to the transfer box is completed.

10. The vacuum transfer type excrement collecting and reverse spraying prevention method according to claim 9, wherein: the time for vacuumizing is 10-13 s.

Technical Field

The invention relates to a vacuum transfer type excrement collecting and reverse spraying prevention control valve, an excrement collecting system and a reverse spraying prevention method.

Background

The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.

The excrement collecting system is an important component of a toilet and is widely applied to railway passenger cars. The way that the toilet stool collecting system on the early railway passenger car is directly discharged to the rail under the car not only influences the use feeling, but also pollutes the natural environment. The vacuum transfer type excrement collecting system is that a transfer box is arranged in a sewage box module, firstly, vacuum is established in the transfer box to collect sewage in the excrement receiver, then the system pressurizes the transfer box, and the sewage is discharged to the sewage box. The vacuum transfer type excrement collecting system is small in air consumption for washing, good in dirt sealing effect and suitable for being installed on a vehicle type with strict compressed air supply and high light weight requirement.

Because the system has the flow of pressurizing the transfer box to discharge sewage to the sewage tank, under the condition of fault superposition, the reverse spraying phenomenon of the sewage under the action of positive pressure when passengers use the toilet can occur, and certain harm can be caused to the passengers and the toilet environment.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention aims to provide a vacuum transfer type excrement collection and reverse spraying prevention control valve, an excrement collection system and a reverse spraying prevention method.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a vacuum transfer type excrement collecting and reverse spraying prevention control valve comprises:

the valve body is provided with a through groove in the middle, a working interface and an air source interface are arranged on the side wall, the working interface and the air source interface are both communicated with the through groove, and the working interface and the air source interface are arranged adjacently along the radial direction of the through groove;

the main valve core is arranged in the through groove, the shape of the main valve core is matched with that of the through groove, and an annular groove is machined on the periphery of the main valve core;

the first spring is arranged between one end of the main valve core and the valve body and provides elasticity for the main valve core, and when the first spring is positioned at the lower limit of compression, the working interface and the air source interface are communicated through the annular groove;

the end socket is arranged at one end of the through groove, a guide groove is formed in the end socket, an iron core, a sealing block and a plug are sequentially arranged in the guide groove, a second spring is connected between the iron core and the end part of the guide groove, the plug is abutted against the main valve core, the plug is of a hollow structure, and the hollow part is communicated with the main valve core; the sealing block is arranged between the guide groove in a sealing mode, a pore passage is processed in the sealing block and is communicated with the hollow structure of the plug, and the air source interface is communicated with the interior of the guide groove through an air supply throttling pore passage;

the control valve body is arranged at the end part of the valve body close to the end socket, the interior of the control valve body is hollow, a vacuum interface is arranged on the side wall of the control valve body, and a one-way diaphragm is arranged at the vacuum interface;

an elastic disc body structure is covered and installed on the cross section of the hollow part of the control valve body to seal the vacuum part, a vacuum interface is positioned between the elastic disc body structure and the seal head, and the elastic disc body structure is perpendicular to the main valve core;

a delay orifice is reserved on the elastic disc body structure, and one end of the elastic disc body structure, which is far away from the vacuum joint, is communicated with the outside;

the permanent magnet is arranged on the elastic disc body structure, is coaxially arranged with the iron core, and is reserved with a set distance from the iron core;

and a third spring is arranged between the permanent magnet and the end socket.

In an initial state, the permanent magnet is far away from the iron core, the iron core enables the pore passage on the sealing block to be staggered with the air supply throttling pore passage under the action of the first spring, the air supply throttling pore passage is sealed, and meanwhile, the main valve core is kept close to the end enclosure under the elastic force of the first spring.

When the hollow part in the control valve body is vacuumized, the elastic disc body structure deforms and moves towards the end socket, so that the permanent magnet is driven to move towards the end socket, the distance between the permanent magnet and the iron core is reduced, and the attraction force to the iron core is increased. The iron core overcomes the action of the elastic force of the second spring and moves towards the permanent magnet under the action of the attraction force of the permanent magnet. The main valve core, the plug and the sealing block move towards the end enclosure direction under the action of the elastic force of the first spring until the pore channel on the sealing block is communicated with the air supply throttling pore channel, and the sealing block stops moving. At the moment, under the sealing action of the main valve core, the air source interface and the working interface are isolated, the air source interface is used for being connected with an external air supply source, air with certain pressure flows to the pore channel of the sealing block through the air supply throttling pore channel and flows to the hollow structure of the plug, certain pressure is formed at the hollow structure, and the pressure pushes the main valve core to overcome the elastic force of the first spring and move towards the direction of the first spring. When the main valve core moves to the position where the annular groove is opposite to the working interface and the air source interface, the main valve core stops moving. The gas with certain pressure directly enters the valve body through the gas source interface and flows out through the working interface to the cylinder connected with the working interface, and the cylinder acts to open the valve plate of the drain valve of the urinal, so that the dirt in the urinal can be flushed into the transfer box.

The work is stopped after the interior of the control valve body is vacuumized for about 10s, at the moment, due to the action of the one-way diaphragm, gas cannot enter through the vacuum interface and only slowly enters from a delay throttling hole in the structure of the elastic disc body, and when the cylinder resets, the valve plate of the drainage valve is closed. When the amount of gas entering the control valve body reaches a certain value, the shape of the elastic disc body structure is restored, the permanent magnet is driven to reset, the magnetic force applied to the iron core is smaller than the acting force of the second spring, the iron core resets under the acting force of the second spring, the sealing block blocks the communication with the air supply throttling hole channel again, air cannot generate thrust with certain pressure on the main valve core, the air can be restored under the thrust of the first spring, the annular groove leaves the working interface and the air source interface, and sealing of the working interface and the air source interface is achieved. One cycle is completed.

By adopting the structure, the reverse spraying of the toilet sewage can be effectively prevented, and the use safety of the toilet is ensured.

In some embodiments, the areas of the main spool other than the annular groove are sealed with the inner wall of the valve body. The leakage of high-pressure air can be effectively prevented, and the smooth operation is ensured.

In some embodiments, the elastic disc body is a rubber sheet and is fixed on the cross section of the control valve body through a first end cover, and a through hole is reserved in the end cover.

Air can enter the first end cover through the through hole, and then can enter the control valve body through the delay throttling hole reserved on the rubber sheet, so that vacuum is relieved.

In some embodiments, the permanent magnets are annularly arranged. Can generate uniform magnetic force to the iron core and ensure the smooth advance of the iron core.

In some embodiments, a second end cover is arranged at one end of the valve body far away from the seal head, and the first spring is connected between the second end cover and the main valve core.

Furthermore, a through hole is preset in the second end cover. Air can enter the through groove through the through hole, and smooth movement of the main valve core is guaranteed.

In some embodiments, the diameter of the gas supply throttling orifice is 0.4-0.8 mm.

In some embodiments, the delay orifice has a diameter of 0.5 to 0.9 mm.

A vacuum transfer toilet collection system, comprising:

the reverse injection prevention control valve;

the compressed air source is connected with an air source interface of the anti-back-spraying control valve through an electromagnetic valve;

the air cylinder is connected with a valve plate of a drain valve of the urinal, and an air supply pipe of the air cylinder is connected with the working interface;

and the vacuum generator is connected with the vacuum interface.

In some embodiments, the solenoid valve is a two-position, five-way solenoid valve.

A vacuum transfer type excrement collecting and reverse spraying preventing method comprises the following steps:

when the system is in an initial state, the anti-reverse-spraying control valve and the drain valve are in a closed state, the two-position five-way electromagnetic valve and the vacuumizing electromagnetic valve are in a power-off state, and the vacuum generator does not work;

when a flushing button is pressed, the system starts to operate, the vacuum generator works, after 1-3s, the two-position five-way electromagnetic valve is opened, the control valve body is vacuumized, and the vacuumizing is closed after the vacuumizing is set for time;

when the vacuum degree in the control valve body reaches a set value, the anti-reverse-injection control valve is opened, compressed air enters the air cylinder, the air cylinder drives the drain valve to be opened, and dirt is transferred into the transfer box from the urinal;

after air enters the control valve body, the anti-reverse-spraying control valve is closed under the action of the spring, and the transfer process of the sewage from the urinal to the transfer box is completed.

In some embodiments, the time for evacuation is 10-13 s.

The invention has the beneficial effects that:

the vacuum participates in the control of the drain valve, and the vacuum participates in the opening or closing action of the drain valve from physical conditions rather than an electric signal fed back by a detection signal of a vacuum switch, so that the reliability of the system against back spraying is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic structural diagram of an anti-reverse injection control valve according to an embodiment of the present invention.

FIG. 2 is a schematic structural view of the vacuum feces collection system of the present invention.

The anti-reverse-injection control valve comprises a first end cover 1, a second end cover 2, a valve body 3, a working interface 4, a main valve core 5, a plug 6, a sealing gasket 7, a pilot hole 8, a vacuum interface 9, a one-way diaphragm 10, a control cavity 11, a first end cover 12, an air supply throttling hole channel 13, an air source interface 14, a sealing block 15, an iron core 16, a second spring 17, a third spring 18, a permanent magnet 19, a rubber sheet 20, a delay throttling hole 21, a first spring 22, a sealing ring 23, an air cylinder 24, an anti-reverse-injection control valve 25 and a two-position five-way electromagnetic valve.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1, a vacuum transfer type excrement collecting and reverse spraying prevention control valve includes:

the middle part of the valve body 2 is provided with a through groove, the side wall of the valve body is provided with a working interface 3 and an air source interface 13, the working interface 3 and the air source interface 13 are both communicated with the through groove, and the working interface 3 and the air source interface 13 are arranged adjacently along the radial direction of the through groove;

the main valve core 4 is arranged in the through groove, the shape of the main valve core is matched with that of the through groove, and an annular groove is machined on the periphery of the main valve core; the area of the main valve core 4 except the annular groove is sealed with the inner wall of the valve body 2. The leakage of high-pressure air can be effectively prevented, and the smooth operation is ensured.

The first spring 21 is arranged between one end of the main valve element 4 and the valve body 2 and provides elasticity for the main valve element 4, and when the first spring 21 is at the lower compression limit, the working port 3 is communicated with the air source port 13 through the annular groove; one end of the valve body 2, which is far away from the seal head, is provided with a second end cover 1, and a first spring 21 is connected between the second end cover 1 and the main valve element 4. The second end cover 1 is provided with a through hole in advance. Because the main valve element 4 and the through groove of the valve body 2 are arranged in a sealing manner, if gas does not flow in the moving process of the main valve body, partial negative pressure can be formed between the main valve element and the valve body, so that the main valve element is difficult to move smoothly, the through hole is formed in the second end cover 1, air can enter the through groove through the through hole, the pressure at the position of the main valve element is balanced, and the main valve element is guaranteed to move smoothly.

The end socket is arranged at one end of the through groove, a guide groove is formed in the end socket, an iron core 15, a sealing block 14 and a plug 5 are sequentially arranged in the guide groove, a second spring 16 is connected between the iron core 15 and the end part of the guide groove, the plug 5 is of a hollow structure, and the hollow part is communicated with the main valve core 4; the sealing block 14 is arranged between the guide groove in a sealing mode, a pore passage is processed in the sealing block 14 and is communicated with the hollow structure of the plug 5, and the air source interface 13 is communicated with the interior of the guide groove through an air supply throttling pore passage 12; the diameter of the air supply throttling pore passage 12 is 0.4-0.8mm, and can be 0.4mm, 0.5mm, 0.6mm, 0.7mm and 0.8 mm.

The control valve body is arranged at the end part, close to the end socket, of the valve body 2, the interior of the control valve body is hollow, a vacuum interface 8 is arranged on the side wall of the control valve body, and a one-way diaphragm 9 is arranged at the vacuum interface;

an elastic disc body structure is covered and installed on the cross section of the hollow part of the control valve body to seal the vacuum part, a vacuum interface 8 is positioned between the elastic disc body structure and the seal head, and the elastic disc body structure is perpendicular to the main valve core 4;

a delay orifice 20 is reserved on the elastic disc body structure, and one end of the elastic disc body structure, which is far away from the vacuum joint 8, is communicated with the outside; the structure of the elastic disc body is a rubber sheet 19 which is fixed on the section of the control valve body through a first end cover 11, and a through hole is reserved on the first end cover 11. Air can enter the interior of the first end cap 11 through the through hole and can enter the interior of the control valve body through the delay throttle hole 20 reserved on the rubber sheet 19, and the vacuum is relieved. The diameter of the delay throttle hole is 0.5-0.9mm, and can be 0.5mm, 0.6mm, 0.7mm, 0.8mm and 0.9 mm.

The permanent magnet 18 is arranged on the elastic disc body structure, is coaxially arranged with the iron core 15, and is reserved with a set distance from the iron core 15;

a third spring 17 is arranged between the permanent magnet 18 and the end socket.

Further, the permanent magnet 18 is annularly arranged. Uniform magnetic force can be generated to the iron core 15 to ensure smooth advance of the iron core 15.

As shown in fig. 2, a vacuum transfer type feces collection system includes:

the anti-blowout control valve 24;

the compressed air source is connected with an air source interface of the anti-reverse-spraying control valve 24 through a two-position five-way electromagnetic valve 25;

the air cylinder 23 is connected with a valve plate of a drain valve of a urinal, and an air supply pipe of the air cylinder is connected with the working interface 3;

and the vacuum generator is connected with the vacuum interface.

The working interface 3 is a threaded hole and is connected with a drain valve cylinder, and the vacuum interface 8 is a threaded interface and is communicated with the air pressure of the transfer box.

In the initial state, the permanent magnet 18 is far from the pilot core 15, the pilot core 15 maintains the sealing state between the plug 5 and the sealing block 14 under the action of the second spring 16, and the main valve element 4 maintains the right position under the action of the first spring 21.

When the transfer case begins to be vacuumized, the two-position five-way solenoid valve begins to work, the air source interface 13 is filled with pressure gas, the pressure gas enters the air supply throttling hole 12, the vacuum enters the control cavity 10 through the vacuum interface 8, when the vacuum degree rises to a set value, the rubber sheet 19 deforms to drive the permanent magnet 18 to a specified position, the pilot iron core 15 drives the sealing block 14 to move rightwards under the action of magnetic force, the pressure gas enters the pilot hole 7, the main valve core 4 moves leftwards under the action of the pressure gas to enable the working interface 3 to be communicated with the air source interface 13, and the pressure gas controls the exhaust valve cylinder to move, so that the exhaust valve is opened.

The vacuum generator stops working after working for 12s, at the moment, due to the action of the one-way diaphragm 9, gas can not enter from the vacuum interface 8 and can only slowly enter from the delay throttling hole 20, at the moment, the main valve core is in a conducting state, and the gas when the drain valve cylinder resets returns to the two-position five-way electromagnetic valve from the gas source interface 13 to be discharged; when the amount of gas entering the control cavity reaches a certain value, the rubber bag 19 deforms to a certain position, the magnetic force applied to the pilot iron core 15 is smaller than the acting force of the pilot spring 16, the seal block 14 blocks the connection of the pilot hole 7 and the gas source, and the main valve core 4 resets under the action of the working spring 21.

A plurality of sealing rings 22 are arranged inside the valve body 2, so that air passages at the left end and the right end of the main valve core 4 are not communicated.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.