Sewage discharge method of cavity suction sewage system

Abstract

The sewage discharge method of the cavity suction sewage discharge system of the present invention comprises a sewage collection device, a vacuum generating device and a transition tank. The inlet of the cavity suction sewage discharge system is provided with a closed structure, and the outlet of the cavity suction sewage discharge system is provided with a normally open bottom valve. The transition tank is closed by using the closed structure and the bottom valve, and the transition tank provides space for the formation of negative pressure in the system. The bottom valve is a normally open bottom valve, which is adsorbed and closed by the vacuum generating device to form a negative pressure, and the closed structure is opened only when the negative pressure in the transition tank reaches a certain value, so that the sewage in the sewage collection device is sucked into the transition tank and discharged from the outlet of the cavity suction sewage discharge system. Furthermore, the gas extracted by the vacuum generating device is blown to the bottom valve to assist the bottom valve to close quickly, thereby improving the response speed; further, the sewage spirally descends in the transition tank to reduce the discharge noise.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum sewage discharge systems, and more specifically, to a sewage discharge method of a cavity suction sewage discharge system. Background Art

[0002] The vacuum sewage system uses the air pressure difference generated by the flushing system to suck away the dirt in the toilet in the form of air suction to achieve the purpose of reducing the use of flushing water. It includes a toilet combination, a vacuum sewage workstation and a sewage tank connected in sequence. The system needs to maintain pressure for a long time to ensure the vacuum degree in the system. The toilet combination includes multiple toilets, each of which includes a vacuum sewage valve. The vacuum sewage valve is expensive, and such a sewage system has many parts, a large volume, and a complex system, which is not suitable for home use.

[0003] The application number is CN201922152763.9, and the name is a Chinese utility model patent for a modular portable micro-vacuum sanitary washing system. It discloses a modular portable micro-vacuum sanitary washing system, which belongs to the field of sanitary and epidemic prevention technology. The system includes a micro-vacuum module and a squatting module; the cabinet of the micro-vacuum module is equipped with a pressure tank, a vacuum pump and a sewage collection tank, the air inlet of the pressure tank is connected to the vacuum pump, and the air outlet is connected to the sewage collection tank through the air path solenoid valve; the box body of the squatting module is equipped with a squatting pan, and one end is equipped with a second toilet water outlet interface, a second sewage collection interface, a wastewater interface, and a second wash drainage interface; the first toilet water outlet interface and the second toilet water outlet interface of the micro-vacuum module and the squatting module, the first sewage collection interface and the second sewage collection interface, and the first wash drainage interface and the second wash drainage interface are connected by flexible pipes. The utility model system has a simple structure, convenient assembly and disassembly, and is convenient to unfold, withdraw and transport. It has the functions of toilet, washing and showering, and because of the micro-vacuum negative pressure suction, it is convenient to collect excrement and save water. This patent is provided with a vacuum pump to generate vacuum and a pressure tank to maintain pressure, and the structure is complex and the volume is large.

[0004] The application number is CN202011395303.X, and the name is "A Chinese invention patent for a suction and drainage method and device for online air extraction and on-site gravity sewage unloading", which discloses an online air extraction and on-site gravity sewage unloading suction and drainage method, comprising a container connected to a toilet sewage outlet, a normally closed sewage outlet is arranged at the bottom of the container, and the sewage outlet can be opened by the gravity of the wastewater generated by a defecation, the sewage outlet is connected to a wastewater storage tank arranged on-site, and an air extraction combination is arranged on the top of the container. By short-term opening of the air extraction combination, negative pressure can be formed in the container, thereby driving the wastewater in the toilet to be discharged into the wastewater storage tank through the container. The disadvantage of this patent is that the gravity dirt discharger is normally closed. In order to ensure that the gravity dirt discharger can be opened under the gravity of the dirt, the angle between the gravity dirt discharger and the container outlet will not be too large. Too small an angle is not conducive to the discharge of dirt, and the dirt is not discharged cleanly, especially some large-volume dirt, such as rags, paper towels, etc., because the gravity dirt discharger is not opened at an angle that is not enough, the larger dirt cannot be discharged, causing blockage. If there is dirt in the feed port and the container, the air extraction combination will suck the dirt into the air extraction combination when vacuuming, affecting the performance of the air extraction combination. This patent sets a normally closed gravity dirt discharger. After the dirt is sucked into the container, the normally closed gravity dirt discharger is opened by the gravity of the dirt, and the dirt is discharged. The disadvantage of this patent is that when the air extraction combination is vacuumed, the odor in the container and the pipeline is discharged to the outdoors through the air outlet of the air extraction combination, polluting the environment. Especially when used at home, the odor is discharged around the house, affecting the air quality and bringing inconvenience to life. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sewage discharge method of a cavity suction sewage discharge system which can discharge sewage cleanly and effectively avoid blockage in view of the deficiencies existing in the prior art.

[0006] The above-mentioned purpose of the present invention is achieved by the following technical solutions:

[0007] A sewage discharge method for a cavity suction sewage discharge system, the cavity suction sewage discharge system comprising a sewage collection device, a vacuum generating device and a transition tank, the inlet of the cavity suction sewage discharge system is provided with a closed structure, and the outlet of the cavity suction sewage discharge system is provided with a normally open bottom valve, specifically comprising the following steps:

[0008] S1: The vacuum generating device evacuates the transition tank to form a negative pressure in the transition tank, and the negative pressure adsorbs and closes the normally open bottom valve;

[0009] S2: Continue to evacuate, the closed structure opens, and the dirt in the dirt collection device is sucked into the transition tank;

[0010] S3: Turn off the vacuum generating device, open the normally open bottom valve, and discharge the waste from the outlet of the sewage system;

[0011] S4: The closed structure is closed.

[0012] The cavity suction sewage discharge system described in the present invention has a normally open bottom valve at the outlet of the sewage discharge system. In the comparative document, due to the normally closed bottom valve (equivalent to the gravity sewage unloader in the comparative document), the angle between the bottom valve and the outlet of the sewage discharge system is small, the sewage is not discharged cleanly and it is easy to cause blockage. The bottom valve is set to be a normally open bottom valve. The normally open bottom valve of the present invention closes the outlet of the sewage discharge system by relying on the system negative pressure adsorption; after a certain negative pressure is formed in the transition tank, the closed structure is opened, and the sewage is quickly sucked into the transition tank under the action of the negative pressure, and the atmosphere also enters the transition tank from the sewage collection device. At this time, the vacuum generating device is closed, and the gravity of the sewage and the gravity of the bottom valve itself cause the bottom valve to open. The bottom valve can be opened to the angle designed by the designer, and the sewage is discharged from the outlet of the sewage discharge system. The sewage is discharged cleanly without causing blockage. After the waste is discharged from the outlet of the sewage system, the closed structure is closed again. During the operation, the transition tank does not need to maintain a vacuum state continuously. When it is used next time, the vacuum generating device is reopened, and the bottom valve is closed under the action of negative pressure to start the next round of sewage discharge. The transition tank needs to be evacuated only when sewage is discharged. After the sewage is discharged, the transition tank is released from the vacuum state and maintained at normal pressure.

[0013] Furthermore, the closing structure uses a valve and / or a water seal to close the inlet.

[0014] Furthermore, the closed structure is a valve. After the normally open bottom valve is closed, vacuuming is continued, the valve is opened, and the dirt is sucked into the transition tank by the negative pressure.

[0015] Furthermore, the waste collecting device is located below the transition tank, and waste is sucked into the transition tank from bottom to top.

[0016] When the closed structure is a valve, the transition tank can be installed at a high position, that is, the installation position of the transition tank is above the waste collection device, and the closed structure valve plays a role in preventing the waste in the transition tank from flowing back into the waste collection device. The closed structure valve not only helps to form a negative pressure in the transition tank, but also plays a role in preventing backflow and preventing odor. Since the bottom valve is a normally open bottom valve, mosquitoes and odors in the waste tank will enter the transition tank through the outlet of the sewage system, and then enter the waste collection device. The valve is provided, which can also prevent odor and mosquitoes.

[0017] In order to ensure a good negative pressure effect, the height difference between the transition tank and the collecting device is h, h≤1.5 meters.

[0018] Furthermore, the closed structure is a water seal. After the normally open bottom valve is closed, vacuuming continues, and negative pressure destroys the water seal. After the dirt is sucked into the transition tank by the negative pressure, the vacuum generating device is closed.

[0019] The enclosed structure may also be a water seal only, and generally sanitary ware such as toilets and bathroom cabinets have water seals for deodorization. However, when the transition tank is installed at a high position, there is only a water seal, and dirt will flow back.

[0020] Furthermore, the closed structure is a water seal and a valve. After the normally open bottom valve is closed, vacuum is continued, and then the valve is opened. The negative pressure destroys the water seal, and the dirt is sucked into the transition tank by the negative pressure, and then the vacuum generating device is closed. That is, a valve is added to the existing sanitary ware. It plays the role of sealing and preventing backflow at the same time.

[0021] Furthermore, the valve is an active valve. An active valve is a valve driven by gas, liquid, electricity or manually. When an active valve is used, when the negative pressure in the vacuum transition tank reaches a set value, the active valve is opened. The active valve can be opened manually or controlled to open by a controller.

[0022] When the closed structure is a water seal and a valve, the valve is a one-way valve, wherein the one-way valve prevents backflow, prevents odor, and prevents mosquitoes; the water seal seals. After the normally open bottom valve is closed, the negative pressure causes the one-way valve to open, and the dirt is sucked into the transition tank by the negative pressure. The one-way valve cannot seal and form a vacuum in the system, because once the transition tank is evacuated, the negative pressure will easily open the one-way valve, and the negative pressure at this time cannot suck up the dirt, or the negative pressure cannot destroy the water seal. However, the one-way valve can prevent backflow, prevent odor, and prevent mosquitoes when it is not discharging sewage. When using a one-way valve, the dirt does not need a controller or manually open and close the valve, and the negative pressure can open the one-way valve, and the dirt flows into the transition tank.

[0023] Furthermore, the gas sucked by the vacuum generating device blows the normally open bottom valve to assist in closing the normally open bottom valve; the vacuum generating device stops vacuuming, the gas sucked by the vacuum generating device stops blowing the normally open bottom valve, the bottom valve opens, and the waste is discharged from the outlet of the cavity suction sewage discharge system.

[0024] The closing speed of the normally open bottom valve is related to the response speed of the system. The gas extracted by the vacuum generating device is blown into the bottom valve to assist the bottom valve in closing smoothly and quickly, thereby ensuring smooth closing of the bottom valve and improving the response speed.

[0025] Furthermore, when the closed structure includes a water seal, when the negative pressure in the transition tank is -10 kPa to -20 kPa, the negative pressure destroys the water seal, and the dirt is sucked into the transition tank by the negative pressure.

[0026] Furthermore, the waste enters the transition tank, and the liquid and solid in the waste descend in a spiral in the transition tank and are discharged from the outlet of the cavity suction sewage discharge system, and the gas is sucked away by the vacuum generating device.

[0027] The dirt is sucked into the transition tank under negative pressure with great force. If the transition tank is a straight cylinder, the dirt enters from the side of the transition tank and hits the inner wall of the transition tank, making a loud noise. If the dirt enters from the top of the transition tank, the dirt directly hits the bottom valve, which is easy to damage. If the dirt spirals down in the transition tank, the dirt does not hit the side of the transition tank, which greatly reduces the noise. The dirt also does not directly hit the bottom valve, which increases the service life of the bottom valve.

[0028] In the present invention, the closed structure and the bottom valve close the system, and the transition tank provides space for the formation of negative pressure in the closed system. The transition tank includes an upper cavity and a lower cavity. The upper cavity is flat and has a diameter greater than its height. Therefore, it can be called a cavity suction sewage system.

[0029] The present invention has the following beneficial effects:

[0030] The sewage discharge method of the cavity suction sewage discharge system described in the present invention utilizes a closed structure and a bottom valve to close the transition tank, and the transition tank provides space for the formation of negative pressure in the system. The bottom valve is a normally open bottom valve, and the normally open bottom valve is adsorbed and closed by a vacuum generating device to form a negative pressure by vacuuming. The closed structure opens only when the negative pressure in the transition tank reaches a certain value, and the sewage in the sewage collection device is sucked into the transition tank and discharged from the outlet of the cavity suction sewage discharge system. Furthermore, the gas extracted by the vacuum generating device is blown into the bottom valve to assist the rapid closure of the bottom valve and improve the response speed; further, the sewage spirally descends in the transition tank to reduce the discharge noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 It is a schematic diagram of the structure of the chamber suction sewage discharge system of Example 1.

[0033] Figure 2 It is a schematic diagram of the structure of the chamber suction sewage discharge system of Example 2.

[0034] Figure 3 Schematic diagram of the structure of the chamber suction sewage system of Example 3.

[0035] 1 is a toilet, 2 is a vacuum generating device, 3 is a transition tank, 4 is a sewage tank, 5 is a bottom valve, 6 is an active valve, 7 is a water seal, 8 is a return air outlet, and 9 is a one-way valve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0037] Example 1

[0038] A sewage discharge method of a cavity suction sewage discharge system, such as Figure 1 As shown, the cavity suction sewage system includes a sewage collection device, a vacuum generating device 2, a transition tank 3 and a sewage box 4. The inlet of the cavity suction sewage system is provided with a closed structure, and the outlet of the cavity suction sewage system is provided with a normally open bottom valve 5. The outlet of the sewage system in this embodiment is the outlet of the transition tank; the sewage collection device is a toilet 1, and the toilet 1 does not have a water seal; the closed structure is a valve, and the valve is an active valve 6; Figure 1 As shown, the installation position of the transition tank 3 is higher than the toilet 1; the air outlet of the vacuum generating device 2 is connected to the return air outlet 8;

[0039] The specific steps include:

[0040] S1: When defecation is completed, the flushing button is pressed to flush water, and the vacuum generating device 2 is started, and the vacuum generating device 2 is started to generate vacuum;

[0041] S2: The vacuum generating device 2 evacuates the transition tank 3 to form a negative pressure in the transition tank 3. The gas sucked by the vacuum generating device 2 blows the normally open bottom valve 5 through the return gas outlet 8 to assist the normally open bottom valve 5 to close. The negative pressure adsorbs and closes the normally open bottom valve 5.

[0042] S3: Continue to evacuate. When the negative pressure in the transition tank reaches -10 kPa, open the active valve 6, and the waste is sucked from the toilet 1 into the transition tank 3 from bottom to top;

[0043] S4: The liquid and solid in the waste descend in a spiral in the transition tank 3, and the gas is sucked away by the vacuum generating device 2;

[0044] S5: The vacuum generating device 2 is turned off, and the gas sucked by the vacuum generating device 2 stops blowing the normally open bottom valve 5, the normally open bottom valve 5 opens, and the waste is discharged from the outlet of the sewage discharge system into the sewage tank 4;

[0045] S6: Close active valve 6.

[0046] The waste collection device in the cavity suction sewage system described in this embodiment is a toilet 1. The vacuum toilet 1 uses negative pressure as power to collect waste, and is a gravity-free discharge. The vacuum sewage pipe does not require the slope requirement of the traditional gravity sewage pipe, and also allows sewage to be discharged upward, which makes the sewage pipe installation project small and not easily restricted by terrain. Since the negative pressure itself has the effect of tearing, crushing and stirring the waste, the water and waste form a uniform and delicate viscous fluid in the pipe without the risk of blockage. Therefore, the diameter of the pipe for negative pressure collection is much smaller than that of the pipe for gravity discharge, and since the transportation in the pipe does not rely on gravity, the direction of the pipe is almost arbitrary. When sewage is discharged upward, that is, the position of the transition tank 3 is higher than the position of the collection device toilet 1, it is necessary to prevent the dirt in the transition tank 3 from flowing back. An active valve is arranged between the toilet 1 and the transition tank 3. The active valve not only plays a sealing role, but also prevents the dirt in the transition tank 3 from flowing back. When in use, after the dirt is sucked into the transition tank 3, the atmosphere enters the transition tank 3 from the toilet 1, and the vacuum generating device 2 is closed at the same time. The transition tank 3 is at atmospheric pressure, the valve is closed, and the dirt in the transition tank 3 will not flow back into the toilet 1.

[0047] Example 2

[0048] A sewage discharge method of a cavity suction sewage discharge system, such as Figure 2 As shown, the cavity suction sewage system includes a waste collection device, a vacuum generating device 2, a transition tank 3 and a sewage box 4, the inlet of the cavity suction sewage system is provided with a closed structure, and the outlet of the cavity suction sewage system is provided with a normally open bottom valve 5; the waste collection device is a toilet 1, and the toilet 1 is provided with a water seal 7; the closed structure is a one-way valve 9 and a water seal 7; the installation position of the transition tank 3 is higher than the toilet 1; the air outlet of the vacuum generating device 2 is connected with a return air outlet 8;

[0049] The specific steps include:

[0050] S1: When defecation is completed, the flushing button is pressed to flush water, and the vacuum generating device 2 is started, and the vacuum generating device 2 is started to generate vacuum;

[0051] S2: The vacuum generating device 2 evacuates the transition tank 3 to form a negative pressure in the transition tank 3. The gas sucked by the vacuum generating device 2 blows the normally open bottom valve 5 to assist the normally open bottom valve 5 to close. The negative pressure absorbs and closes the normally open bottom valve 5 and opens the one-way valve 9.

[0052] S3: Continue to vacuumize. When the negative pressure in the transition tank 3 reaches -10 kPa, the negative pressure destroys the water seal, and the waste is sucked from the toilet 1 into the transition tank 3 from bottom to top;

[0053] S4: The liquid and solid in the waste descend in a spiral in the transition tank 3, and the gas is sucked away by the vacuum generating device 2;

[0054] S5: The vacuum generating device 2 is turned off, and the gas sucked by the vacuum generating device 2 stops blowing the normally open bottom valve 5, the normally open bottom valve 5 opens, and the waste is discharged from the outlet of the sewage discharge system into the sewage tank 4;

[0055] S6: The one-way valve 9 is closed to form a new water seal 7.

[0056] The closed structure is a water seal 7 and a one-way valve 9. On the basis of the existing toilet 1, there is no need to modify the toilet 1. The water seal 7 and the one-way valve 9 double seal the inlet to ensure good sealing performance, and there is no need to modify the existing toilet. It can also be installed at a high position, and the sewage is sucked from the low-level toilet 1 into the high-level transition tank 3. The bottom valve 5 seals the outlet of the sewage system, and the water seal 7 and the one-way valve 9 seal the inlet to ensure that negative pressure is formed in the transition tank 3. The negative pressure first opens the one-way valve 9. When the negative pressure generated in the transition tank 3 reaches -10kPa, the negative pressure destroys the water seal, and the sewage in the toilet 1 is sucked into the transition tank 3.

[0057] Example 3

[0058] A sewage discharge method of a cavity suction sewage discharge system, such as Figure 1 As shown, the cavity suction sewage discharge system includes a sewage collection device, a vacuum generating device 2, a transition tank 3 and a sewage box 4, the inlet of the cavity suction sewage discharge system is provided with a closed structure, and the outlet of the cavity suction sewage discharge system is provided with a normally open bottom valve 5; the sewage collection device is a toilet 1, and the toilet 1 is provided with a water seal 7, and the closed structure is the water seal 7; the installation position of the transition tank 3 is lower than the toilet 1; the air outlet of the vacuum generating device 2 is connected with a return air outlet 8;

[0059] The specific steps include:

[0060] S1: When defecation is completed, the flushing button is pressed to flush water, and the vacuum generating device 2 is started, and the vacuum generating device 2 is started to generate vacuum;

[0061] S2: The vacuum generating device 2 evacuates the transition tank 3 to form a negative pressure in the transition tank 3. The gas sucked by the vacuum generating device 2 blows the normally open bottom valve 5 to assist the normally open bottom valve 5 to close; the negative pressure adsorbs and closes the normally open bottom valve 5;

[0062] S3: Continue to vacuum. When the negative pressure reaches -10 kPa, the negative pressure destroys the water seal, and the dirt is sucked from the toilet into the transition tank 3 from top to bottom;

[0063] S4: The liquid and solid in the waste descend in a spiral in the transition tank 3, and the gas is sucked away by the vacuum generating device 2;

[0064] S5: The vacuum generating device 2 is turned off, and the gas sucked by the vacuum generating device 2 stops blowing the normally open bottom valve 5. The gravity of the waste opens the normally open bottom valve 5, and the waste is discharged from the outlet of the waste discharge system into the waste tank 4;

[0065] S6: forming a new water seal 7.

[0066] When the closed structure is only a water seal, the installation position of the toilet 1 must be above the position of the transition tank 3, and the waste flows from the high-position toilet 1 into the low-position transition tank 3. The water seal 7 and the normally open bottom valve seal the transition tank 3, so that negative pressure is formed in the transition tank 3. When the negative pressure reaches -10kPa, the negative pressure destroys the water seal 7, and the atmosphere enters the transition tank 3. The bottom valve 5 opens under the action of the gravity of the waste and its own gravity, and the waste is discharged into the sewage tank 4.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A sewage discharge method of a cavity suction sewage discharge system, the cavity suction sewage discharge system comprising a sewage collection device, a vacuum generating device and a transition tank, characterized in that: The inlet of the cavity suction sewage discharge system is provided with a closed structure, and the outlet of the cavity suction sewage discharge system is provided with a normally open bottom valve, which specifically includes the following steps: S1: The vacuum generating device evacuates the transition tank to form a negative pressure in the transition tank, and the negative pressure adsorbs and closes the normally open bottom valve; S2: Continue to vacuum, open the closed structure, and suck the dirt in the dirt collection device into the transition tank; S3: Turn off the vacuum generating device, open the normally open bottom valve, and discharge the waste from the outlet of the sewage system; S4: closed structure; The gas sucked by the vacuum generating device blows the normally open bottom valve, assisting the normally open bottom valve to close; the vacuum generating device stops vacuuming, the gas sucked by the vacuum generating device stops blowing the normally open bottom valve, the bottom valve opens, and the waste is discharged from the outlet of the cavity suction sewage discharge system.

2. The sewage discharge method of the chamber suction sewage discharge system according to claim 1, characterized in that: The closing structure uses a valve and / or a water seal to close the inlet.

3. The sewage discharge method of the chamber suction sewage discharge system according to claim 2, characterized in that: The closed structure is a valve. After the normally open bottom valve is closed, the valve is opened and the dirt is sucked into the transition tank by negative pressure.

4. The sewage discharge method of the chamber suction sewage discharge system according to claim 3, characterized in that: The waste collecting device is located below the transition tank, and waste is sucked into the transition tank from bottom to top.

5. The sewage discharge method of the chamber suction sewage discharge system according to claim 2, characterized in that: The closed structure is a water seal. After the normally open bottom valve is closed, vacuuming continues, and negative pressure destroys the water seal. After the dirt is sucked into the transition tank by the negative pressure, the vacuum generating device is closed.

6. The sewage discharge method of the chamber suction sewage discharge system according to claim 2, characterized in that: The closed structure is a water seal and a valve. After the normally open bottom valve is closed, vacuuming is continued, and then the valve is opened. The negative pressure destroys the water seal, and after the dirt is sucked into the transition tank by the negative pressure, the vacuum generating device is closed.

7. The sewage discharge method of the chamber suction sewage discharge system according to any one of claims 2 to 6, characterized in that: The valve is an active valve.

8. The sewage discharge method of the chamber suction sewage discharge system according to claim 5 or 6, characterized in that: When the negative pressure in the transition tank is -10 kPa to -20 kPa, the negative pressure destroys the water seal and the dirt is sucked into the transition tank by the negative pressure.

9. The sewage discharge method of the chamber suction sewage discharge system according to claim 1, characterized in that: The waste enters the transition tank, and the liquid and solid in the waste descend in a spiral in the transition tank and are discharged from the outlet of the cavity suction type sewage discharge system, and the gas is sucked away by the vacuum generating device.

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