Pneumatic vacuum negative pressure sewage collection system

Abstract

This invention discloses a pneumatic vacuum negative pressure sewage collection system, including sanitary fixtures, gravity flow pipes, terminal collection wells, negative pressure branch pipes, negative pressure main pipes, inspection wells, vacuum pump stations, positive pressure pipes, and municipal pipe networks. One end of the gravity flow pipe is connected to the sanitary fixtures, and the other end is connected to the inlet pipe of the terminal collection well. This invention uses a level sensor to detect the sewage level and generate a pressure signal, driving a vacuum actuator—a non-electric pneumatic control mechanism—to ultimately control the opening and closing of the vacuum interface valve. This purely pneumatic and mechanical control logic replaces the level sensor, solenoid valve, and circuit control system required in traditional technologies, allowing the entire terminal collection well to operate stably without an external power source or battery. This not only solves the application problems in areas with unstable power supply but also completely avoids electrical faults caused by moisture, leakage, and short circuits, ensuring the system's operational reliability in various harsh environments.

Description

Technical Field

[0001] This invention relates to the field of sewage collection technology, specifically a pneumatic vacuum negative pressure sewage collection system. Background Technology

[0002] Traditional vacuum wastewater collection technology relies on electricity to power the equipment in the end-of-pipe collection wells. Each well requires power from a source or batteries to operate the entire system. This presents several challenges. If the power supply fails, the system malfunctions. In rural areas with limited power infrastructure, backup power or other emergency measures may be necessary, increasing system complexity and cost. Furthermore, electronic equipment maintenance is complex. Level sensors, solenoid valves, and other electronic components require specialized technicians for maintenance and upkeep. The humid environment inside the end-of-pipe collection wells also increases the risk of component failure, impacting system performance.

[0003] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0004] In response to the problems in related technologies, this invention proposes a pneumatic vacuum negative pressure sewage collection system to overcome the aforementioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by the present invention is as follows: A pneumatic vacuum negative pressure sewage collection system includes sanitary fixtures, gravity flow pipes, terminal collection wells, negative pressure branch pipes, negative pressure main pipes, inspection wells, a vacuum pump station, a positive pressure pipe, and a municipal pipe network. One end of the gravity flow pipe is connected to the sanitary fixture, and the other end is connected to the inlet pipe of the terminal collection well. The outlet of the vacuum pump station is connected to the municipal pipe network through the positive pressure pipe. The terminal collection well is an electricity-free structure, including a well body, a water collection tank inside the well body, and an electricity-free negative pressure collection box. The electricity-free negative pressure collection box is equipped with a vacuum interface valve and a vacuum actuator for controlling the vacuum interface valve. A liquid level sensing tube is installed in the water collection tank. The liquid level sensing tube is connected to the connection port of the vacuum actuator through a first rubber hose. The control output end of the vacuum actuator is connected to the control chamber of the vacuum interface valve through a second rubber hose.

[0006] Preferably, the vacuum actuator is a non-electric pneumatic control mechanism, internally equipped with a two-position three-way valve and a delayed-closing structure. The two-position three-way valve switches from a normally closed state to an open state when the air pressure signal transmitted by the liquid level sensing tube reaches a threshold. The delayed-closing structure ensures that the vacuum interface valve remains open for an adjustable period after the sewage in the collection tank is emptied. By using a non-electric pneumatically controlled vacuum actuator, the system can accurately convert the liquid level signal into mechanical action. Its delayed-closing function ensures that the sewage is completely emptied and the pipeline is flushed, effectively preventing residue and blockage, and improving operational reliability.

[0007] Preferably, the vacuum interface valve is a normally closed pinch valve structure, which includes a valve body, an internal cavity, and a return spring. The internal cavity is connected to the vacuum actuator through the second rubber hose. When the internal cavity is connected to the vacuum system, the valve core opens under the action of differential pressure, overcoming the elastic force of the return spring. When the internal cavity is disconnected from the vacuum system, it automatically closes under the action of the return spring. The use of a normally closed pinch valve as a vacuum interface valve, with its differential pressure drive and spring return working principle, results in minimal valve wear, high throughput, significantly extended service life, and reduced maintenance requirements.

[0008] Preferably, the negative pressure main pipe is provided with multiple inspection wells. Providing multiple inspection wells on the negative pressure main pipe provides a convenient inspection access for the system, making it easy to quickly locate and resolve local blockages or leaks, and greatly reducing the difficulty and cost of subsequent maintenance.

[0009] Preferably, the terminal collection well is an integrated wall-mounted collection box structure, which is composed of a sewage tank and an equipment box. Its material is stainless steel. Designing the terminal collection well as an integrated wall-mounted stainless steel collection box makes it independent of underground space and can be flexibly installed in special occasions where excavation is inconvenient. At the same time, the stainless steel material is strong and corrosion-resistant, which expands the application scenarios and improves durability.

[0010] Preferably, the non-electric negative pressure collection box includes a box body, and a vacuum actuator and a vacuum interface valve disposed inside the box body. The vacuum actuator is equipped with a pneumatic signal interface for connecting an external liquid level sensing tube. The control output end of the vacuum actuator is connected to the control chamber of the vacuum interface valve through a rubber hose. The vacuum actuator is configured to operate in response to changes in pneumatic pressure received by the pneumatic signal interface, controlling the opening and closing of the control chamber of the vacuum interface valve, thereby realizing the non-electric opening and closing of the vacuum interface valve. By using the non-electric negative pressure collection box, the core functions are modularized, which facilitates the production, installation and rapid replacement of standard products. It is suitable for both new system construction and old system renovation, simplifies maintenance and shortens downtime.

[0011] Preferably, the vacuum interface valve is a normally closed pinch valve, which is normally closed by an internal return spring and opened by the pressure difference between the control chamber and the outside. The use of a normally closed pinch valve ensures that this independent functional module also has excellent performance in terms of high reliability, long life and low flow resistance, thus enhancing its market competitiveness.

[0012] The beneficial effects of this invention are as follows: 1. By sensing the sewage level through a liquid level sensor and generating a pressure signal, the system drives a vacuum actuator—a pneumatic control mechanism without electricity—ultimately controlling the opening and closing of the vacuum interface valve. This purely pneumatic and mechanical control logic replaces the liquid level sensor, solenoid valve, and circuit control system required in traditional technologies, allowing the entire end-of-line collection well to operate stably without an external power source or battery. This not only solves the application problems in areas with unstable power (such as remote rural areas) but also completely avoids electrical faults caused by moisture, leakage, and short circuits, ensuring the system's operational reliability in various harsh environments.

[0013] 2. By employing a normally closed pinch valve as the vacuum interface valve, its operation is driven by differential pressure and a spring, resulting in minimal rubber wear and significant advantages such as high throughput and long service life. Simultaneously, the core components are integrated into a non-electric negative pressure collection box, achieving functional modularity. This simple and reliable mechanical structure greatly reduces reliance on professional electronic technicians and maintenance frequency, effectively reducing long-term maintenance costs. Furthermore, the integrated wall-mounted design of the end-of-line collection well eliminates the need for underground excavation, making it highly suitable for special locations such as narrow alleys and tourist attractions, greatly expanding the application scope of this technology. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall process structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the end collection well structure according to an embodiment of the present invention.

[0016] In the diagram: 1. Sanitary ware; 2. Gravity flow pipe; 3. Terminal collection well; 31. Inlet pipe; 32. Valve; 33. Well body; 34. Collection tank; 35. Outlet pipe; 36. Liquid level sensor; 37. Non-electric negative pressure collection box; 38. Rubber hose; 39. Vacuum actuator; 310. Vacuum interface valve; 311. Connection port; 4. Negative pressure branch pipe; 5. Negative pressure main pipe; 6. Inspection well; 7. Vacuum pump station; 8. Positive pressure pipeline; 9. Municipal pipe network. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] According to an embodiment of the present invention, a pneumatic vacuum negative pressure sewage collection system is provided.

[0019] Example 1; like Figures 1-2 As shown, the pneumatic vacuum negative pressure sewage collection system according to an embodiment of the present invention includes a sanitary fixture 1, a gravity flow pipe 2, a terminal collection well 3, a negative pressure branch pipe 4, a negative pressure main pipe 5, a maintenance well 6, a vacuum pump station 7, a positive pressure pipe 8, and a municipal pipe network 9. One end of the gravity flow pipe 2 is connected to the sanitary fixture 1, and the other end is connected to the inlet pipe 31 of the terminal collection well 3. The outlet of the vacuum pump station 7 is connected to the municipal pipe network 9 through the positive pressure pipe 8. The terminal collection well 3 is a non-electric structure, which includes a well body 33. A water collection tank 34 and a non-electric negative pressure collection box 37 are installed inside the well body 33. The non-electric negative pressure collection box 37 is equipped with a vacuum interface valve 310 and a vacuum actuator 39 for controlling the vacuum interface valve 310. A liquid level sensing tube 36 is installed in the water collection tank 34. The liquid level sensing tube 36 is connected to the connection port 311 of the vacuum actuator 39 through a first rubber hose 38. The control output end of the vacuum actuator 39 is connected to the control chamber of the vacuum interface valve 310 through a second rubber hose 38.

[0020] In this embodiment, the vacuum actuator 39 is a non-electric pneumatic control mechanism, internally equipped with a two-position three-way valve and a delayed-closing structure. When the air pressure signal transmitted by the liquid level sensing tube 36 reaches a threshold, the two-position three-way valve switches from a normally closed state to an open state. The delayed-closing structure ensures that after the sewage in the collection tank 34 is emptied, the vacuum interface valve 310 remains open for an adjustable period. By using the non-electric pneumatically controlled vacuum actuator 39, the system can accurately convert the liquid level signal into mechanical action. Its delayed-closing function ensures that the sewage is completely emptied and the pipeline is flushed, effectively preventing residue and blockage, and improving operational reliability.

[0021] In this embodiment, the vacuum interface valve 310 is a normally closed pinch valve structure, which includes a valve body, an internal cavity, and a return spring. The internal cavity is connected to the vacuum actuator 39 through a second rubber hose 38. When the internal cavity is connected to the vacuum system, the valve core opens under the action of differential pressure, overcoming the elastic force of the return spring. When the internal cavity is disconnected from the vacuum system, it automatically closes under the action of the return spring. The use of a normally closed pinch valve as the vacuum interface valve 310, with its differential pressure drive and spring return working principle, results in minimal valve wear, high throughput, significantly extended service life, and reduced maintenance requirements.

[0022] In this embodiment, multiple inspection wells 6 are provided on the negative pressure main pipe 5. The multiple inspection wells 6 on the negative pressure main pipe provide a convenient inspection entrance for the system, making it easy to quickly locate and solve local blockage or leakage problems, and greatly reducing the difficulty and cost of later maintenance.

[0023] In this embodiment, the terminal collection well 3 is an integrated wall-mounted collection box structure, which is composed of a sewage tank and an equipment box. Its material is stainless steel. The terminal collection well 3 is designed as an integrated wall-mounted stainless steel collection box, so that it does not rely on underground space and can be flexibly installed in special occasions where it is inconvenient to excavate. At the same time, the stainless steel material is strong and corrosion resistant, which expands the application scenarios and improves durability.

[0024] In this embodiment, the non-electric negative pressure collection box 37 includes a box body, a vacuum actuator 39 and a vacuum interface valve 310 disposed inside the box body. The vacuum actuator 39 is equipped with a pneumatic signal interface for connecting an external liquid level sensing tube 36. The control output end of the vacuum actuator 39 is connected to the control chamber of the vacuum interface valve 310 through a rubber hose 38. The vacuum actuator 39 is configured to act in response to the pneumatic pressure change received by the pneumatic signal interface, controlling the opening and closing of the control chamber of the vacuum interface valve 310, thereby realizing the non-electric opening and closing of the vacuum interface valve 310. By setting up the non-electric negative pressure collection box 37, the core functions are modularized, which is convenient for production, installation and quick replacement as a standard product. It is suitable for both new system construction and old system transformation, simplifying maintenance and shortening downtime.

[0025] In this embodiment, the vacuum interface valve 310 is a normally closed pinch valve. It is normally closed by relying on an internal reset spring and is opened by relying on the pressure difference between the control chamber and the outside. The use of a normally closed pinch valve ensures that this independent functional module also has excellent performance with high reliability, long life and low flow resistance, thus enhancing its market competitiveness.

[0026] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0027] In practical applications, domestic sewage flows from sanitary fixture 1 through gravity flow pipe 2 into the collection tank 34 of the terminal collection well 3 for temporary storage. When the liquid level rises to a preset height, the air pressure signal in the liquid level sensing tube 36 is transmitted to the vacuum actuator 39 through the rubber hose 38, which drives it to open the vacuum interface valve 310, connecting the collection tank 34 with the negative pressure pipe. Under the action of pressure difference, the sewage is quickly drawn in, collected by the vacuum pump station 7, and discharged into the municipal pipe network 9 through the positive pressure pipe 8. After the sewage discharge is completed, the delayed closing function of the vacuum actuator 39 will maintain a short period of air pumping to flush the pipe. Then the system will automatically reset, the vacuum interface valve 310 will close, and it will wait for the next working cycle.

[0028] In summary, by utilizing the above-mentioned technical solution of this invention, the liquid level sensor 36 senses the sewage level and generates a pressure signal, driving the vacuum actuator 39, a pneumatic control mechanism without electricity, to ultimately control the opening and closing of the vacuum interface valve 310. This purely pneumatic and mechanical control logic replaces the liquid level sensor, solenoid valve, and circuit control system required in traditional technologies, enabling the entire terminal collection well 3 to operate stably without an external power supply or battery. This not only solves the application problem in areas with unstable power, such as remote rural areas, but also completely avoids electrical faults caused by moisture, leakage, and short circuits, ensuring the reliability of the system in various harsh environments. By using a normally closed pinch valve as the vacuum interface valve 310, its action is driven by pressure difference and spring, resulting in minimal rubber wear and outstanding advantages such as high throughput and long service life. At the same time, the core components are integrated into the non-electric negative pressure collection box 37, achieving functional modularization. This simple and reliable mechanical structure greatly reduces the dependence on professional electronic technicians and maintenance frequency, effectively reducing long-term maintenance costs. Furthermore, the integrated wall-mounted design of the end collection well 3 eliminates the reliance on underground excavation, making it equally suitable for special occasions such as narrow alleys and cultural and tourist attractions, greatly expanding the application scope of this technology.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic vacuum negative pressure sewage collection system, comprising sanitary ware (1), gravity flow pipes (2), terminal collection wells (3), negative pressure branch pipes (4), negative pressure main pipes (5), inspection wells (6), vacuum pump stations (7), positive pressure pipes (8), and municipal pipe networks (9); characterized in that, One end of the gravity flow pipe (2) is connected to the sanitary ware (1), and the other end is connected to the inlet pipe (31) of the terminal collection well (3). The outlet of the vacuum pump station (7) is connected to the municipal pipe network (9) through the positive pressure pipe (8). The terminal collection well (3) is an electric-free structure, which includes a well body (33), a water collection tank (34) located in the well body (33), and an electric-free negative pressure collection box (37). The electric-free negative pressure collection box (37) is equipped with a vacuum interface valve (310) and a vacuum actuator (39) for controlling the vacuum interface valve (310). The water collection tank (34) is equipped with a liquid level sensing tube (36). The liquid level sensing tube (36) is connected to the connection port (311) of the vacuum actuator (39) through a first rubber hose (38). The control output end of the vacuum actuator (39) is connected to the control chamber of the vacuum interface valve (310) through a second rubber hose (38).

2. The pneumatic vacuum negative pressure sewage collection system according to claim 1, characterized in that, The vacuum actuator (39) is a non-electric pneumatic control mechanism, which is equipped with a two-position three-way valve and a delayed closing structure. When the air pressure signal transmitted by the liquid level sensing tube (36) reaches the threshold, the two-position three-way valve switches from the normally closed state to the open state. The delayed shutdown structure ensures that the vacuum interface valve (310) remains open for an adjustable period of time after the sewage in the collection tank (34) has been emptied.

3. The pneumatic vacuum negative pressure sewage collection system according to claim 1, characterized in that, The vacuum interface valve (310) is a normally closed pinch valve structure, which includes a valve body, an internal cavity and a return spring; the internal cavity is connected to the vacuum actuator (39) through the second rubber hose (38). When the internal cavity is connected to the vacuum system, the valve core is opened by overcoming the elastic force of the return spring under the action of pressure difference; when the internal cavity is disconnected from the vacuum system, it is automatically closed under the action of the elastic force of the return spring.

4. The pneumatic vacuum negative pressure sewage collection system according to claim 1, characterized in that, The negative pressure main pipe (5) is equipped with multiple maintenance wells (6).

5. The pneumatic vacuum negative pressure sewage collection system according to claim 1, characterized in that, The terminal collection well (3) is an integrated wall-mounted collection box structure, which is composed of a sewage tank and an equipment box, and its material is stainless steel.

6. The pneumatic vacuum negative pressure sewage collection system according to claim 5, characterized in that, The non-electric negative pressure collection box (37) includes a box body, a vacuum actuator (39) and a vacuum interface valve (310) disposed inside the box body. The vacuum actuator (39) is equipped with a pressure signal interface for connecting an external liquid level sensing tube (36). The control output end of the vacuum actuator (39) is connected to the control chamber of the vacuum interface valve (310) through a rubber hose (38). The vacuum actuator (39) is configured to act in response to the pressure change received by the pressure signal interface, and control the opening and closing of the control chamber of the vacuum interface valve (310), thereby realizing the non-electric opening and closing of the vacuum interface valve (310).

7. The pneumatic vacuum negative pressure sewage collection system according to claim 1, characterized in that, The vacuum interface valve (310) is a normally closed pinch valve, which is normally closed by an internal reset spring and opened by the pressure difference between the control chamber and the outside.

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