Fluid conveying device and sewage discharge system based on bottom valve auxiliary closing mechanism

Abstract

The present invention provides a fluid conveying device and sewage discharge system based on a bottom valve auxiliary closing mechanism, wherein the bottom valve is a normally open bottom valve, and the bottom valve auxiliary closing mechanism includes a bottom valve auxiliary closing mechanism based on an active device and a bottom valve auxiliary closing mechanism based on a passive device, and the bottom valve auxiliary closing mechanism provides a force for the opening and closing of the bottom valve, and the bottom valve is a normally open bottom valve. After the dirt is sucked into the system, the bottom valve opens, and the bottom valve falls and opens to a designed angle, which will not cause dirt blockage. The normally open bottom valve solves the technical problem of the bottom valve being difficult to open and causing blockage in the prior art. When the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on a passive device, the bottom valve auxiliary closing mechanism based on the passive device includes an air blowing port, and the air blowing port is used to provide a driving force for closing the normally open bottom valve, which has a simple structure, recycles odor, is energy-saving and environmentally friendly, has a simple structure, and does not require a circuit to be connected, and can well solve the technical problem of the bottom valve being difficult to open in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum sewage discharge systems, and more specifically, to a fluid conveying device and sewage discharge system based on a bottom valve auxiliary closing mechanism. 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-on-site gravity sewage discharge. It discloses an online air extraction-on-site gravity sewage discharge suction and drainage method, which includes a container connected to the sewage outlet of the toilet, and a normally closed sewage outlet that can be opened by the gravity of the wastewater generated by a defecation is set at the bottom of the container. The sewage outlet is connected to the wastewater storage tank set on the spot, and an air extraction combination is set at the top of the container. By opening the air extraction combination for a short time, a negative pressure can be formed in the container, thereby driving the wastewater in the toilet to be discharged to the wastewater storage tank through the container. The patent sets a normally closed gravity sewage discharger. After the sewage is sucked into the container, the normally closed gravity sewage discharger is opened by the gravity of the sewage, and the sewage is discharged. The disadvantage of this patent is that since the gravity sewage discharger is normally closed, during excretion, the gravity sewage discharger is opened by the gravity of the sewage, and the sewage is discharged into the storage tank. In this structure, the gravity of the dirt may not open the gravity dirt discharger or the opening angle is not enough to discharge the dirt smoothly. The patent also has the disadvantage that when the air extraction assembly is vacuuming, the odor in the container and the pipeline is discharged to the outside through the air outlet of the air extraction assembly, polluting the environment. In particular, when used at home, the odor is discharged to the surrounding area of ​​the house, affecting the air quality and causing inconvenience to life. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fluid conveying device and a sewage discharge system based on a bottom valve auxiliary closing mechanism in view of the shortcomings of the prior art that the bottom valve is difficult to open and causes odor pollution.

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

[0007] A fluid conveying device based on a bottom valve auxiliary closing mechanism comprises a transition tank and a bottom valve, wherein the bottom valve is installed at the bottom of the transition tank; the bottom valve is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0008] When the bottom valve is closed, the bottom valve auxiliary closing mechanism gives the bottom valve a thrust to close the bottom valve. When dirt enters the transition tank, the bottom valve auxiliary closing mechanism releases the force on the normally open bottom valve, and the bottom valve opens under the action of the gravity of the dirt. Since the bottom valve is a normally open bottom valve, the bottom valve can be fully opened to the state designed by the designer without causing blockage by dirt.

[0009] Furthermore, the bottom valve auxiliary closing mechanism includes a bottom valve auxiliary closing mechanism based on an active device and a bottom valve auxiliary closing mechanism based on a passive device.

[0010] Further, when the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on passive devices, the bottom valve auxiliary closing mechanism based on passive devices includes an air blowing port; the sewage discharge system includes a vacuum generating device, the air blowing port is connected to the vacuum generating device, the vacuum generating device is connected to the transition tank, and the air blowing port is close to the bottom valve. When the vacuum generating device is evacuated, the gas at the air outlet of the vacuum generating device is blown toward the bottom valve through the air outlet to assist the bottom valve in closing.

[0011] The present invention is provided with a blowing port, and the gas obtained by vacuuming is used to realize gas recycling. When the vacuum generating device is vacuuming, the bottom valve starts to be adsorbed close to the outlet of the transition tank, and then the return air pipeline also starts to blow air to the bottom valve, so that the bottom valve is quickly closed; as long as the vacuum generating device is blowing a vacuum, the return air pipeline continues to blow air to the bottom valve. When the dirt is sucked into the transition tank, the vacuum generating device stops vacuuming. At this time, negative pressure is no longer needed in the system, and the bottom valve does not need to be compressed. At this time, since the vacuum generating device stops, the blowing port also stops blowing air to the bottom valve. The bottom valve auxiliary closing mechanism of the present invention is a bottom valve auxiliary closing mechanism based on passive devices, which realizes the linkage between the vacuum generating device and the blowing port, and does not require controller control in the middle.

[0012] Furthermore, the air blowing port is connected to the vacuum generating device through a pipeline.

[0013] Furthermore, the air blowing port is located at the back of the bottom valve, and the gas blown out of the air blowing port surrounds the bottom valve, so that the entire bottom valve is subjected to thrust, and the refluxed gas is utilized to the maximum extent.

[0014] Further, when the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on an active device, the bottom valve auxiliary closing mechanism based on an active device includes a power driving device, and the power driving device assists the bottom valve in closing.

[0015] Furthermore, the power drive device is a cylinder, a hydraulic cylinder, an electric cylinder or a spring mechanism.

[0016] When the bottom valve auxiliary closing mechanism is an active device driven by a power device, the power device, such as a cylinder, a hydraulic cylinder, an electric cylinder or a spring mechanism, needs to be connected to the circuit, and its start and close must be controlled by a controller. The connection of active devices is relatively complicated, and the response speed is reduced compared to the bottom valve auxiliary closing mechanism based on passive devices, which requires controller control.

[0017] The present invention also provides a sewage system including any one of the above-mentioned fluid conveying devices based on the bottom valve auxiliary closing mechanism, the sewage system also includes a toilet and a sewage tank, the toilet is connected to the transition tank, and the transition tank is located on the sewage tank.

[0018] Furthermore, the sewage tank may be a municipal sewage system or a domestic septic tank.

[0019] Furthermore, when the sewage discharge system includes a vacuum generating device, the sewage discharge system is a vacuum sewage discharge system, and the volume of the transition tank is greater than or equal to 1.5 times the full water volume of the toilet.

[0020] Compared with the toilet system with a sewage valve and an air storage tank in the prior art, the transition tank in the present invention is a very small cavity structure, and the volume is 1.5 to 3 times the full water volume of the toilet. The toilet or squat toilet commonly used at home requires a large amount of water to flush away the dirt, and the volume of the toilet or squat toilet is relatively large, while the present invention is a vacuum toilet system, and the dirt is sucked into the dirt tank by negative pressure, and only a small amount of water is needed. Therefore, the toilet in the present invention is small, so the transition tank is also small, which is dozens of times smaller than the air storage tank in the vacuum sewage system in the prior art. Only 10 negative pressures are needed to destroy the water seal of the sinking bay to suck the dirt into the system. The water seal and bottom valve of the toilet 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, and the upper cavity is flat, and is a cavity with a diameter greater than the height, so it can be called a cavity suction vacuum toilet system.

[0021] The present invention has the following beneficial effects:

[0022] The fluid conveying device and sewage discharge system based on the bottom valve auxiliary closing mechanism described in the present invention, the bottom valve is a normally open bottom valve, the bottom valve auxiliary closing mechanism includes a bottom valve auxiliary closing mechanism based on an active device and a bottom valve auxiliary closing mechanism based on a passive device, the bottom valve auxiliary closing mechanism provides a force for the opening and closing of the bottom valve, the bottom valve is a normally open bottom valve, after the dirt is sucked into the system, the bottom valve opens, and the bottom valve falls and opens to a designed angle, which will not cause dirt blockage, and the normally open bottom valve solves the technical problem of the bottom valve being difficult to open and causing blockage in the prior art. The most ingenious thing is that when the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on a passive device, the bottom valve auxiliary closing mechanism based on the passive device includes an air blowing port, and the air blowing port is used to provide a driving force for closing the normally open bottom valve, the structure is simple, odor is recycled, energy saving and environmental protection, and on the structure of the prior art, there is no need to add an additional complex structure, and no need to connect a circuit, which can well solve the technical problem of the bottom valve being difficult to open in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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:

[0024] Figure 1 It is a schematic structural diagram of a fluid conveying device based on a bottom valve auxiliary closing mechanism in Example 1.

[0025] Figure 2This is a schematic structural diagram of a fluid delivery device based on a bottom valve auxiliary closing mechanism in Example 2.

[0026] Figure 3 It is a schematic structural diagram of a fluid conveying device based on a bottom valve auxiliary closing mechanism in Example 3.

[0027] Figure 4 It is a schematic diagram of the structure of the sewage discharge system of Example 4.

[0028] Figure 5 It is a schematic diagram of the structure of the sewage discharge system of Example 5.

[0029] Figure 6 It is a schematic diagram of the structure of the sewage discharge system of Example 6.

[0030] 1 is a transition tank, 2 is a bottom valve, 3 is a vacuum generating device, 4 is an air blowing port, 5 is a pipeline, 6 is a cylinder, 7 is a toilet, 8 is a pipeline, and 9 is a sewage tank. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1

[0033] A fluid delivery device based on a bottom valve auxiliary closing mechanism, such as Figure 1 As shown, it includes a transition tank 1 and a bottom valve 2, and the bottom valve 2 is installed at the bottom of the transition tank 1; the bottom valve 2 is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0034] It also includes a vacuum generating device 3. When the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on a passive device, the bottom valve auxiliary closing mechanism based on the passive device includes an air blowing port 4; the air blowing port 4 is connected to the vacuum generating device 3, and the vacuum generating device 3 is connected to the transition tank 1. The air blowing port 4 is close to the bottom valve 2. When the vacuum generating device 3 is evacuated, the gas at the air outlet of the vacuum generating device 3 is blown toward the bottom valve 2 through the air blowing port 4 to assist the bottom valve 2 in closing.

[0035] The air blowing port 4 is connected to the vacuum generating device 3 through a pipeline 5 .

[0036] The air blowing port 4 is located at the back of the bottom valve 2 , and the gas blown out of the air blowing port 4 surrounds the bottom valve 2 .

[0037] The fluid conveying device based on the bottom valve auxiliary closing mechanism described in this embodiment includes a vacuum generating device 3, a transition tank 1, a bottom valve 2, a pipeline 5 and an air blowing port 4. The bottom of the transition tank 1 has an outlet, and the outlet is provided with a bottom valve 2, and the bottom valve 2 is a normally open bottom valve. A bottom valve auxiliary closing mechanism air blowing port 4 is also provided. After the vacuum generating device 3 is turned on, the negative pressure adsorbs the normally open bottom valve close to the outlet, and the air blowing port 4 blows air towards the bottom valve 2 at the same time. The combined force of the negative pressure and the air blowing port 4 causes the bottom valve 2 to close quickly; during the vacuuming process of the vacuum generating device 3, the air blowing port 4 always blows air towards the bottom valve 2, continuously pressing the closed bottom valve 2 to maintain the pressing force.

[0038] In this embodiment, the blowing port 4 is provided, and the normally open bottom valve is provided. The blowing port 4 continuously blows air to the bottom valve 2, which solves the technical problem of the bottom valve being difficult to open and causing blockage in the prior art. The blowing port 4 is used to provide a driving force for closing the normally open bottom valve, which has a simple structure, recycles odor, and is energy-saving and environmentally friendly. On the structure of the prior art, there is no need to add an additional complex structure or connect a circuit, and the technical problem of the bottom valve being difficult to open in the prior art can be well solved.

[0039] Example 2

[0040] A fluid delivery device based on a bottom valve auxiliary closing mechanism, such as Figure 2 As shown, it includes a transition tank 1 and a bottom valve 2, and the bottom valve 2 is installed at the bottom of the transition tank 1; the bottom valve 2 is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0041] It also includes a vacuum generating device 3, which is connected to the transition tank 1. The bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on active devices. The bottom valve auxiliary closing mechanism based on active devices includes a power driving device, which assists the bottom valve in closing.

[0042] The power driving device is a cylinder 6.

[0043] In this embodiment, the cylinder 6 gives thrust to the normally open bottom valve, pushing the bottom valve 2 to close. The vacuum generating device 3 evacuates the system. When dirt enters the transition tank 1, the vacuum generating device 3 stops evacuating, and the cylinder 6 opens the bottom valve 2. Since the bottom valve 2 is a normally open bottom valve, the bottom valve 2 can be fully opened to the state designed by the designer, and will not cause dirt blockage.

[0044] Example 3

[0045] A fluid delivery device based on a bottom valve auxiliary closing mechanism, such as Figure 3As shown, it includes a transition tank 1 and a bottom valve 2, and the bottom valve 2 is installed at the bottom of the transition tank 1; the bottom valve 2 is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0046] The bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on an active device, and the bottom valve auxiliary closing mechanism based on an active device includes a power driving device, and the power driving device is used to assist the bottom valve in closing.

[0047] The power driving device is a cylinder 6.

[0048] In the fluid conveying device based on the bottom valve auxiliary closing mechanism described in this embodiment, waste enters the pipeline through water flushing. When the waste reaches the transition tank 1, the cylinder 6 drives the bottom valve 2 to open, and the waste is discharged into the waste tank. After the waste is discharged, the cylinder 6 drives the bottom valve 2 to close, and the bottom valve 2 plays a role of sealing and deodorization.

[0049] Example 4

[0050] A sewage system, such as Figure 4 As shown, it includes a toilet 7, a vacuum generating device 3, a transition tank 1, a bottom valve 2 and a sewage tank 9, the bottom valve 2 is installed at the bottom of the transition tank 1, the toilet 7 is connected with the transition tank 1, the vacuum generating device 3 is connected with the transition tank 1, and the transition tank 1 is located on the sewage tank 9; the bottom valve 2 is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0051] The bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on passive components, and the bottom valve auxiliary closing mechanism based on passive components includes an air blowing port; the air blowing port 4 is connected to the vacuum generating device 3, and the air blowing port 4 is close to the bottom valve 2. When the vacuum generating device 3 is evacuated, the gas at the air outlet of the vacuum generating device 3 is blown toward the bottom valve 2 through the air outlet 4, thereby assisting the bottom valve 2 to close.

[0052] The air blowing port 4 is connected to the vacuum generating device 3 through the pipeline 5. The air blowing port 4 and the pipeline 5 form a return air pipeline.

[0053] The air blowing port 4 is located at the back of the bottom valve 2 , and the gas blown out of the air blowing port 4 surrounds the bottom valve 2 .

[0054] The sewage tank 9 is a domestic septic tank.

[0055] The volume of the transition tank 1 is greater than or equal to 1.5 times the full water volume of the toilet, preferably 1.5 times, 2 times, 2.5 times or 3 times.

[0056] In the sewage discharge system described in this embodiment, after the vacuum generating device 3 is started, the negative pressure adsorbs the bottom valve 2 close to the outlet of the transition tank 1, and the gas in the return air pipeline wraps the entire bottom valve 2, blowing the bottom valve 2 to help the bottom valve 2 close quickly. After the bottom valve 2 is closed, the gas in the return air pipeline continues to blow the bottom valve 2 to maintain air tightness. When the negative pressure in the system reaches a certain value, the sewage is sucked into the pipeline 8 and the transition tank 1 together with the water seal under the action of the negative pressure, the vacuum generating device 3 is closed, and there is no gas in the return air pipeline to act on the bottom valve 2. The sewage pushes the bottom valve 2 to the designed angle, and the sewage falls into the sewage tank 9. The odor in the return air pipeline flows back to the sewage tank 9, and the odor is not directly discharged into the external environment. After the odor is filtered out by the filter, it is discharged from the vent, and the ball valve is opened, and the sewage is discharged through the sewage outlet.

[0057] When the dirt enters the transition tank 1, the vacuum generating device 3 stops vacuuming, and the bottom valve 2 opens under the action of the dirt gravity. Since the bottom valve 2 is a normally open bottom valve, the bottom valve 2 can be fully opened to the state designed by the designer, and will not cause dirt blockage. When the angle between the normally open bottom valve and the outlet of the transition tank 1 is small, the normally open bottom valve can close the outlet by relying on negative pressure. The bottom valve auxiliary closing mechanism is used to give the bottom valve 2 a thrust, so that the bottom valve 2 is quickly closed, thereby improving the response speed. When the angle between the normally open bottom valve and the outlet of the transition tank 3 is large, the normally open bottom valve cannot close the outlet by relying on negative pressure alone. In this case, the normally open bottom valve first relies on negative pressure to absorb the outlet close to the bottom of the transition tank 1, and the bottom valve auxiliary closing mechanism provides thrust for the normally open bottom valve, so that the normally open bottom valve is closed smoothly. The bottom valve auxiliary closing mechanism can also be used to close the bottom valve, and then the vacuum generating device 3 starts vacuuming. The bottom valve auxiliary closing mechanism continuously provides thrust for the bottom valve 2, so that the bottom valve 2 is continuously pressed during vacuuming to ensure air tightness.

[0058] Example 5

[0059] A sewage system, such as Figure 5 As shown, it includes a toilet 7, a vacuum generating device 3, a transition tank 1, a bottom valve 2 and a sewage tank 9. The bottom valve 2 is installed at the bottom of the transition tank 1. The toilet 7 is connected to the transition tank 1 through a pipeline 8. The transition tank 1 is located on the sewage tank 9. The bottom valve 2 is a normally open bottom valve. A bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0060] The vacuum generating device 3 is also included, and the vacuum generating device 3 is connected to the transition tank 1. The bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on an active device, and the bottom valve auxiliary closing mechanism based on the active device includes a power driving device, which assists the bottom valve to close.

[0061] The power driving device is a cylinder 6.

[0062] In this embodiment, the cylinder 6 gives thrust to the normally open bottom valve, pushing the bottom valve 2 to close. The vacuum generator 3 evacuates the system, and the waste in the toilet 7 enters the transition tank through the pipeline 8. The vacuum generator 3 stops evacuating, and the cylinder 6 opens the bottom valve 2, and the waste falls into the waste tank 9. Since the bottom valve 2 is a normally open bottom valve, the bottom valve 2 can be fully opened to the state designed by the designer, and will not cause waste blockage.

[0063] Example 6

[0064] A sewage system, such as Figure 6 As shown, it includes a toilet 7, a transition tank 1, a bottom valve 2 and a sewage tank 9. The bottom valve 2 is installed at the bottom of the transition tank 1. The toilet 7 is connected to the transition tank 1, and the transition tank 1 is located on the sewage tank 9. The bottom valve 2 is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism.

[0065] The bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on an active device, and the bottom valve auxiliary closing mechanism based on an active device includes a power driving device, and the power driving device is used to assist the bottom valve in closing.

[0066] The power driving device is a cylinder 6.

[0067] In the sewage discharge system described in this embodiment, the sewage in the toilet 7 is flushed into the pipeline 8 by water. When the sewage reaches the transition tank 1, the cylinder 6 drives the bottom valve 2 to open, and the sewage is discharged into the sewage tank 9.

[0068] 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 fluid conveying device based on a bottom valve auxiliary closing mechanism, comprising a transition tank and a bottom valve, wherein the bottom valve is installed at the bottom of the transition tank; characterized in that: The bottom valve is a normally open bottom valve, and a bottom valve auxiliary closing mechanism is arranged near the normally open bottom valve, and the normally open bottom valve is closed by the bottom valve auxiliary closing mechanism; it also includes a vacuum generating device, and when the bottom valve auxiliary closing mechanism is a bottom valve auxiliary closing mechanism based on a passive device, the bottom valve auxiliary closing mechanism based on the passive device includes an air blowing port; the air blowing port is connected with the vacuum generating device, and the vacuum generating device is connected with the transition tank, and the air blowing port is close to the bottom valve. When the vacuum generating device is evacuated, the gas at the air outlet of the vacuum generating device is blown toward the bottom valve through the air outlet to assist the bottom valve in closing.

2. The fluid delivery device based on the bottom valve auxiliary closing mechanism according to claim 1, characterized in that: The air blowing port is communicated with the vacuum generating device through a pipeline.

3. The fluid delivery device based on the bottom valve auxiliary closing mechanism according to claim 2, characterized in that: The air blowing port is located at the back of the bottom valve, and the gas blown out of the air blowing port surrounds the bottom valve.

4. A sewage system comprising a fluid delivery device based on a bottom valve auxiliary closing mechanism according to any one of claims 1 to 3, characterized in that: The sewage discharge system also includes a toilet and a sewage tank. The toilet is connected to a transition tank, and the transition tank is located on the sewage tank.

5. The sewage system according to claim 4, characterized in that: The sewage tank may be a municipal sewage system or a domestic septic tank.

6. The sewage system according to claim 4, characterized in that: When the sewage system includes a vacuum generating device, the sewage system is a vacuum sewage system, and the volume of the transition tank is greater than or equal to 1.5 times the full water volume of the toilet.

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