A fully automatic pneumatic control device

Abstract

The present invention relates to a fully automatic pneumatic control device, comprising a shell, an actuator and a power assembly installed in the shell, and a control assembly for triggering the power assembly to drive the actuator to work; the actuator, power assembly and control assembly are distributed in sequence from top to bottom; the actuator comprises a valve core assembly for realizing air and vacuum on and off; the power assembly comprises a needle valve assembly for realizing delayed closing and a slide valve assembly for realizing rapid opening; the control assembly comprises a liquid level pressure sensor, a voltage stabilizing buffer unit and a kinetic energy conversion unit; the present invention is mainly composed of three core components, including an actuator, a power assembly and a control assembly, which can realize the compactness and reliability of the structural design; the space formed inside has active, reliable and effective water collection and drainage technology and structure, and the internal reasonable circulation pipeline design has low resistance and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum sewage continuous collection, temporary storage and periodic transportation system of vacuum sewage, wherein the vacuum sewage continuous collection, temporary storage and periodic transportation system belongs to a vacuum well, has a temporary sewage collection device which adopts a vacuum sewage valve for periodic sewage discharge, and can transport the sewage in its sewage collection device to the downstream vacuum collection pipeline network, and adopts a pressure difference drive control method, that is, a pneumatic control method for control, and its components mainly include a vacuum sewage valve, a sewage cavity, an equipment cavity, a well cover, a manual ball valve, a gravity sewage inlet pipeline, a sewage pipeline connected to the downstream vacuum collection pipeline network, and a sewage suction pipeline; for the vacuum sewage valve control system in the vacuum well, the present invention particularly relates to a fully automatic pneumatic control device. Background Art

[0002] In the field of vacuum domestic sewage collection, transportation and treatment technology, vacuum domestic sewage collection is the most advanced technical field, which includes such technical application scenarios: relying on a pipe based on the principle of vacuum or negative pressure airflow transportation that inhales air at one end and discharges air at the other end, domestic sewage (such as black water represented by wastewater sources such as urinals and toilets, and gray water represented by wastewater sources such as kitchens, washing and bathing) from buildings (such as rural bungalows, tile houses, buildings, cement houses, villas, as well as urban residential buildings, high-rise buildings, and mansions) is transported to a distant sewage pool or vacuum collection and transportation pipeline system.

[0003] A typical technical solution to realize this application scenario is to use a temporary sewage storage tank, which has an inlet connected to the sewage outlet of the building, a sewage suction port connected to the vacuum sewage conveying pipeline (or vacuum source, vacuum sewage tank, etc.), and a vacuum sewage valve (or vacuum valve, main valve) connecting the sewage suction port and the vacuum sewage conveying pipeline; the vacuum sewage valve has a control system or device, and its basic operation (or working) process is that when the sewage water level in the storage tank reaches a first preset value (or high water level value), the controller applies vacuum force to the vacuum sewage valve to suck away and empty the sewage, until the sewage water level in the sewage tank drops to another preset value (or low water level value), the control system closes the vacuum sewage valve, and the system is defined as a vacuum sewage continuous collection, temporary storage and periodic delivery system, referred to as a vacuum collection well, or vacuum well.

[0004] Generally, in the field of liquid or sewage collection technology, it is a well-known technology to use vacuum technology to collect liquid or sewage. In the past 130 years, a large number of foreign patent documents have involved these subdivided technical fields. Although the domestic technology accumulation time is relatively short, the development of vacuum drain valve control systems, especially differential pressure pneumatic controllers, has been very rapid in recent years. For domestic and foreign designs, it is generally divided into three main core components, actuator components, control components and power components, among which:

[0005] (1) Actuator: used to connect vacuum and air to the output interface continuously and intermittently, so that the output interface can finally connect vacuum and air intermittently in sequence. The structure is similar to a two-position three-way reversing valve, which has two input interfaces, connected to vacuum and air respectively, and an output interface, connected to a vacuum drain valve;

[0006] At present, there are mainly two types of diaphragm type reversing valve structures that realize this function, namely, a corrugated diaphragm reset type structure with a spring above the diaphragm and a corrugated diaphragm reset type structure with a spring below the diaphragm; among them, the corrugated diaphragm reset type structure with a spring above the diaphragm can refer to the invention patents applied for by Foreman et al., whose EU patent number is EP0519523A2 (1992), US patent number is US5069243 (1989), etc.; and the invention patents applied for by Huisma et al., whose EU patent number is E P0152386B1 (1984); the corrugated diaphragm reset structure with the spring under the diaphragm can refer to the invention patent applied for by Foreman et al. in 1981, whose U.S. patent number is US4373838 (1981); the invention patent applied for by Featheringill et al. in 1995, whose U.S. patent number is US5570715 (1995); the invention patent applied for by John et al. in 1976, whose U.S. patent number is US3998736 (1976), etc.;

[0007] The above prior art has the following defects:

[0008] a. Poor drainage effect in the chamber: For example, the chamber in EU patent No. EP0519523A2 has the problem of concentrated water accumulation and difficulty in drainage. The air extraction port 38 is at the top of the chamber. Although a drainage pipe 39 is specially added to remove the accumulated condensed water in the chamber 40, the distance between the groove of the corrugated diaphragm 38 and the entrance of the drainage pipe 39 is very close after the action of the corrugated diaphragm 38, so that the water can be removed; similarly, the problem of poor drainage in the chamber is also present in US Patent No. US4373838;

[0009] b. Incomplete drainage in the chamber: For example, after the corrugated diaphragm 38 of EU patent No. EP0519523A2 is actuated, its groove is very close to the entrance of the drain pipe 39 to drain the water; but the too close distance causes the end of the drain pipe 39 to adsorb the corrugated diaphragm 48 together during high-speed air extraction, causing the corrugated diaphragm to be unable to rise further, thereby affecting the functional realization of the actuator and the switching between air and vacuum. Therefore, in actual use, the gap is relatively large, and the accumulated water will remain; while the output port 122 in U.S. Patent No. US4373838 is The control chambers in various valves are connected, and the vacuum port 96 is circulated or connected to the interface 122 with only two bends. Relatively speaking, this is a better solution, but the installation method of the controller is horizontal, that is, 96 and 122 are installed vertically on the ground. The problem is that when the controller is closed, the air in the 122 pipeline will condense the moisture in the air into condensed water due to the impact of its airflow on the 114 valve core. The condensed water is mixed with impurities such as dust in the air and adheres to the sealing contact edge of the 114 valve core, resulting in poor sealing, and then air leakage occurs;

[0010] c. Vacuum is not introduced quickly: For example, in the European Union patent No. EP0519523A2, the outlet 51 and the vacuum pipeline (the pipeline below the sealing ring 43) are bent many times, and the vacuum inlet (located on the side) of the vacuum drain valve pneumatic controller reaches the outlet 51 after four 90-degree gas path turns. As a result, the gas pipeline has a large flow resistance, resulting in the air in the control chambers of various valves connected to the output port not being able to be quickly and thoroughly discharged through the vacuum access port; while the output port 122 of the U.S. patent No. US4373838 is connected to the control chambers in various valves, and the vacuum port 96 is circulated or connected to the interface 122 with only two bends, and relatively speaking, its working effect is further improved;

[0011] d. It is impossible to merge with other functional components: For example, the water collection and drainage function module or parts (referred to as water collection and drainage or water collection and drainage parts) in EU Patent No. EP0519523A2 are independently configured from the pneumatic controller, which takes up space and requires more parts than the integrated type, because more mounting parts, connectors and other parts are required; and the vacuum port is located below the air port, which is not conducive to integrated design, because the water collection and drainage functions require a larger chamber, and when the controller is inconvenient in height, the effective internal height of the chamber becomes extremely important, and the air inlet is above the vacuum port, which means that the height of the water collection and drainage chamber is shortened, thereby reducing the water collection effect; and the corrugated diaphragm valve core of U.S. Patent No. US4373838 moves horizontally, and each chamber is also arranged horizontally, which results in the water collection and drainage parts based on gravity to collect condensed water cannot realize their function.

[0012] (2) Control component: used to achieve the change of the volume of the relevant chamber under the control of the sensor, thereby triggering the execution of the power device. Its basic functional technical requirements are sensitive response and reliable reset;

[0013] At present, the control components that realize this function include the following main parts: sensor, voltage-stabilizing buffer, and kinetic energy conversion unit; among them, the sensor is designed based on the principle of air pressure change caused by liquid level change; the voltage-stabilizing buffer is used for sudden changes in air pressure caused by liquid level fluctuations to prevent the sudden changes in pressure from causing misoperation of the controller; the kinetic energy conversion unit refers to a component that converts liquid level pressure energy into displacement, thereby providing a control signal for the power device;

[0014] Since the working principle of the liquid level sensor is the same, the kinetic energy conversion device is also similar, and is based on a diaphragm structure. However, the details in many aspects are different. The most representative technologies mainly have two structural types, namely, the invention patent applied by Foreman et al., whose U.S. patent number is US5069243 (1989), and the invention patent applied by Foreman et al., whose U.S. patent number is US4373838 (1981);

[0015] The above prior art has the following defects:

[0016] a. Poor reliability and effectiveness of drainage in the chamber: For example, in U.S. Patent No. US5069243, the access port of the liquid level controller is at the top. The problem is that the connecting pipe needs to be bent once, which will cause the connecting pipe to bend and deform during long-term use, thereby increasing the force on the joint 25 and causing damage; and the upward pipe joint is not conducive to the reflux and discharge of condensed water in the pipe, which is a more serious problem; more seriously, the condensed water well in the chamber 29 passes through the damping hole of the corrugated diaphragm 30 and the pipe 32, and then gradually accumulates; with the continued use time and the increase in the temperature difference between the inside and outside of the vacuum well, the condensed water accumulation effect becomes more obvious, and more fatally, the accumulated condensed water cannot be returned or discharged through the original path, because the interface 25 is configured at the top, and the change in air pressure caused by the fluctuation of the liquid level in the liquid level sensor is not significant, especially under the existence of the damping hole 30 of the corrugated diaphragm, which further aggravates the difficulty of discharging condensed water.

[0017] The U.S. Patent No. 4,373,838 has explored or improved the drainage problem to a certain extent. The condensed water in chamber 78 can be discharged into the pipeline connected to the liquid level sensor through the damping hole 118 at the lower end of the controller. More importantly, the connector of the liquid level controller is horizontally configured, which is conducive to the discharge of condensed water. The condensed water in chamber 79 enters chamber 80 through hole 88. Under the action of the vacuum suction pipe 120, the condensed water in the two chambers can be discharged out of the controller. However, hole 88 is not at the tangent point at the bottom of the chamber of the horizontally configured controller, but a little closer to the center direction, resulting in a certain amount of condensed water accumulated in chamber 79. At the same time, the vacuum suction pipe 120 in chamber 80 is vertically configured. Under the action of the throttle valve 120, the vacuum suction speed has been reduced, especially the adsorption of condensed water on the surface of the chamber, especially the water on the bottom, and the accumulated condensed water cannot be completely and effectively emptied.

[0018] b. The reliability and effectiveness of the liquid level fluctuation stabilization function are poor: For example, in U.S. Pat. No. 4,373,838, the liquid level fluctuation stabilization is achieved by the damping hole 118. This solution has a simple structure but poor effect, because the sudden increase in air pressure caused by the sudden increase in liquid level will accelerate the ejection of air from the damping hole 118, thereby playing a certain stabilizing role within a certain pressure range, and the pressure increase and pressure decrease have the same effect on the corrugated diaphragm 86, but in opposite directions; while the technical goal is to achieve a good stabilization effect when the air pressure increases, which should be slow and stable; and to achieve a fast and continuous effect when the air pressure decreases. However, the actual situation is that the rate of pressure decrease is the same as that of pressure increase;

[0019] c. The structural setting of the throttle port is unreasonable: For example, in U.S. Patent No. 4,373,838, different parts 118 need to be configured to cope with the different high liquid level differences of different vacuum well sewage tanks. Moreover, the parts are special-shaped parts and are inconvenient to store. The presence of small holes leads to high mold opening costs.

[0020] (3) Power assembly: used to realize intermittent connection of vacuum and air to the actuator under the control of the control assembly to meet the requirement of fast switching, similar to a two-position two-way reversing valve or a two-position three-way reversing valve, wherein there are two input interfaces, which are connected to vacuum and / or air respectively, and there is one output interface, which is connected to the input interface or control interface of the actuator;

[0021] The power assembly mainly includes a switch mechanism for turning on and off air or vacuum, a delayed closing structure, etc.; wherein the switch mechanism for turning on and off vacuum or air is a device that is indirectly triggered by a sensor from an actuator and is then used to drive the actuator to generate a pressure difference; the energy-power conversion mechanism is a device that realizes the pressure difference between vacuum and atmosphere by turning on and off the switch mechanism for vacuum or air, thereby driving the actuator to achieve rapid opening; it can adopt a working principle structure such as a piston slide valve structure or a diaphragm slide valve structure, that is, a two-position two-way reversing valve or a two-position three-way reversing valve; considering that the diaphragm structure occupies a large space, and the piston slide valve structure The valve structure is compact. Taking into account that the quick opening and delayed closing mechanisms use a needle valve to delay the adjustment of the air, the energy-power conversion mechanism uses a two-position two-way piston slide valve reversing valve, in which the input is an interface connected to the vacuum pipeline, and the output interface has an input interface or control interface connected to the actuator; the delayed closing mechanism is a mechanism for extending the closing time of the controller; the delayed closing mechanism is used to delay the discharge of sewage for a period of time before closing, which helps to effectively drop the liquid level in the vacuum collection well to the lower limit position, avoid the liquid level falling distance being too small, causing frequent on and off operations of the vacuum collection well, causing accelerated aging of the equipment and reduced service life.

[0022] The most representative technologies in the prior art mainly include two structural types, namely, the invention patent applied for by Foreman et al., whose U.S. patent number is US5069243 (1989), and the invention patent applied for by Foreman et al., whose U.S. patent number is US4373838 (1981);

[0023] The above prior art has the following defects:

[0024] a. Poor reliability of sheet metal parts: For example, the on-off switch mechanism in U.S. Patent No. US5069243 has two schemes, namely the duckbill valve structure and the spring lever pullback clip structure. The duckbill valve structure is made of rubber parts. Although the structure is compact, it is easy to block or leak, so the environmental adaptability is poor; the spring lever pullback clip structure is an integrated sheet metal part. Although it is highly sensitive, it has the disadvantages of easy rust and stains affecting the sealing. In particular, when the air with high humidity and dust enters the interior of the controller, the corrosion of the parts is aggravated and the air tightness of the matching is destroyed; the technical solution of the on-off switch mechanism in U.S. Patent No. US4373838 is a spring lever pullback clip structure, which has a more complex structure. In particular, the spring lever pullback clip structure is a hinged sheet metal part. Although it is highly sensitive, it has the disadvantages of easy wear and rust of the rotating shaft. In particular, when the air with high humidity and dust enters the interior of the controller, the corrosion of the parts is aggravated and the air tightness of the matching is destroyed;

[0025] b. The water collection and drainage functions are unreliable: For example, the delayed closing mechanism structure scheme in U.S. Patent No. US5069243 is to set a speed regulating needle valve on the air pipeline to turn on and off the vacuum. The delayed closing mechanism structure scheme in the technology of U.S. Patent No. US4373838 is just the opposite of the former, that is, to set a speed regulating needle valve on the vacuum pipeline to turn on and off the air. Since the vacuum pressure will be affected by many factors, such as the pressure fluctuation upstream of the vacuum pipeline at the moment when the vacuum drain valve is turned on and off, the sewage backflow in the sewage suction pipe after the vacuum drain valve is closed at the end of operation will impact the liquid level sensor, causing its liquid level to fluctuate, which in turn causes the control to be more serious. The upper vacuum control pipeline joint is at the top of the device, close to the bottom of the chamber 80 through the suction pipe 120, so there are problems of water accumulation and poor sewage discharge.

[0026] In view of a series of problems existing in the prior art, such as: the condensed water inside the chamber is difficult to discharge or is not discharged completely, the design of the relevant ventilation pipeline is unreasonable, and the functionality and reliability of the overall structural design are poor. The present invention has developed a fully automatic pneumatic control device to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention were found. Summary of the invention

[0027] The purpose of the present invention is to provide a fully automatic pneumatic control device to solve the problems in the prior art that condensed water inside the device is difficult to discharge or is not discharged completely, the internal pipeline design is unreasonable, and the functionality and reliability are poor.

[0028] The technical solution of the present invention is: a fully automatic pneumatic control device, including a shell, an actuator and a power assembly installed in the shell, and a control assembly that triggers the power assembly to drive the actuator to work; the actuator, power assembly and control assembly are distributed in sequence from top to bottom; the actuator includes a valve core assembly for realizing air and vacuum on and off; the power assembly includes a needle valve assembly for realizing delayed closing and a sliding valve assembly for realizing rapid opening; the control assembly includes a liquid level pressure sensor, a voltage stabilizing buffer unit and a kinetic energy conversion unit.

[0029] Preferably, the shell includes an upper shell, a middle shell and a lower shell which are arranged in sequence from top to bottom, and a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity and a sixth cavity which are connected in sequence from top to bottom are arranged inside the middle shell, a first inner hole is arranged between the first cavity and the second cavity, a second inner hole is arranged between the second cavity and the third cavity, a third inner hole is arranged between the third cavity and the fourth cavity, a fourth inner hole is arranged between the fifth cavity and the sixth cavity, and a first air path is arranged on the side of the fourth inner hole, whose two ends are respectively connected to the fourth inner hole and the sixth cavity; an air flow channel is also arranged inside the middle shell, and an air inlet and a valve body air interface connected to the air flow channel, a valve body air control interface connected to the third cavity, and a vacuum inlet and outlet connected to the fourth cavity are arranged on the side wall, and the air flow channel is also connected to the second cavity and the sixth cavity.

[0030] Preferably, the valve core assembly includes a valve core body, a first return spring and a first diaphragm; the valve core body passes through the first inner hole, the second inner hole and the third inner hole in sequence, and extends into the first cavity, the second cavity, the third cavity and the fourth cavity, and the inner walls of the first inner hole, the second inner hole and the third inner hole are all nested with rubber sealing rings for forming a seal with the side wall of the valve core body; a sealing pressure plate is integrally provided on the valve core body in the third cavity, and through grooves are provided on the side walls of the valve core body at the upper and lower ends of the sealing pressure plate; the first return spring is sleeved on the outer wall of the valve core body in the second cavity; the first diaphragm is arranged in the fourth cavity, the middle part is fixedly connected to the lower end of the valve core body, the outer end along the circumferential direction is fixedly connected to the inner wall of the fourth cavity, and the fourth cavity is divided into a first upper chamber and a first lower chamber.

[0031] Preferably, a throttling channel connected to the fifth cavity is provided on the side wall of the middle shell body opposite to the fifth cavity, and the throttling channel is connected to the vacuum inlet and outlet; the needle valve assembly is nested in the throttling channel, including a needle valve body extending into the fifth cavity and an adjusting knob fixed on the side of the needle valve body away from the fifth cavity.

[0032] Preferably, the sliding valve assembly includes a valve stem, a second return spring and a second diaphragm; the valve stem is nested and slidably matched with the fourth inner hole, and a second air path passage connected to each other is provided between the side wall and the upper end surface; the second return spring is arranged in the fourth inner hole at the upper end of the valve stem; the second diaphragm is arranged in the sixth cavity, the middle part is fixedly connected to the lower end part of the valve stem, the outer end along the circumferential direction is fixedly connected to the inner wall of the sixth cavity, and the sixth cavity is divided into a second upper chamber and a second lower chamber.

[0033] Preferably, a connecting head is fixed to the lower end of the lower shell, a seventh cavity is arranged between the upper end of the connecting head and the lower end surface of the lower shell, a guide hole is arranged between the seventh cavity and the sixth cavity, and a sensor interface connected to the side wall is arranged; the liquid level pressure sensor is connected to the sensor interface; the voltage stabilizing buffer unit includes the area formed by the connecting head and the seventh cavity, a third diaphragm is arranged in the seventh cavity, the outer end of the third diaphragm along the circumferential direction is fixedly connected to the inner wall of the seventh cavity, and a through hole connecting the upper and lower ends of the third diaphragm is arranged on the end face; the kinetic energy conversion unit includes the sixth cavity and the area formed by the second diaphragm.

[0034] Compared with the prior art, the advantages of the present invention are:

[0035] (1) The present invention is mainly composed of three core components, including an actuator component, a power component and a control component, which can achieve compactness and reliability of the structural design; the space formed inside has active, reliable and effective water collection and drainage technology and structure, and the internal flow pipeline design is reasonable, with low resistance and high efficiency.

[0036] (2) The actuator is used to realize the continuous and intermittent connection of vacuum and air to the air control interface of the valve body, so that the air control interface of the valve body can finally realize the requirement of intermittent connection of vacuum and air in sequence, which is similar to a two-position three-way reversing valve; at the same time, the third shell connected with it can realize the vortex-like inflow and jet-like outflow of airflow, which is convenient for discharging condensed water vapor inside the structure, thereby effectively realizing the water collection and drainage functions, realizing the structural merger of the actuator and the water collection and drainage functional components, realizing functional integration, and avoiding independent configuration.

[0037] (3) The power assembly is used to realize intermittent connection of vacuum and air to the actuator assembly to meet the requirements of rapid switching. The present invention adopts a piston-type sliding valve assembly for rapid opening control and a needle valve assembly for delayed closing control, avoiding the use of traditional sheet metal parts for rapid opening control technology, greatly reducing the number of parts, making the structure more compact and more reliable.

[0038] (4) The control component is used to achieve the volume change of the second upper chamber and the second lower chamber inside the device under the control of the liquid level pressure sensor, thereby triggering the power component to drive the execution component to work. The control component has a reliable liquid level fluctuation voltage stabilization function, that is, a third diaphragm with a through hole is used, which can achieve voltage stabilization when the pressure is increased and rapid pressure relief when the pressure is reduced; at the same time, the sensor interface is located at the bottom of the fully automatic pneumatic control device, and the water vapor condensed in the sixth cavity can be discharged in turn along the guide hole, the through hole and the sensor interface, effectively realizing the water collection and drainage function; and the through hole on the third diaphragm plays a role in both drainage and ventilation, and also realizes functional integration, with high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0040] Figure 1 This is a structural schematic diagram of a fully automatic pneumatic control device according to the present invention installed in a vacuum well;

[0041] Figure 2 It is a partial sectional front view of a fully automatic pneumatic control device according to the present invention;

[0042] Figure 3 It is a partial cross-sectional front view of the housing of the present invention;

[0043] Figure 4 It is a top view of the third shell of the present invention;

[0044] Figure 5 This is a front view of the installation section of the actuator / valve core assembly of the present invention;

[0045] Figure 6 It is a structural schematic diagram of the valve core body of the present invention;

[0046] Figure 7 This is a front view of the installation section of the power assembly of the present invention;

[0047] Figure 8 It is a structural schematic diagram of the upper end portion of the guide ring of the present invention;

[0048] Fig. 9 It is a structural schematic diagram of the lower end portion of the guide ring of the present invention;

[0049] Fig.10 It is a partial structural cross-sectional view of the control assembly of the present invention;

[0050] Fig.11 It is a 1 / 4 side cross-sectional structural explosion diagram and air circulation route diagram of the first middle shell, the second middle shell and the third middle shell of the present invention;

[0051] Fig.12 A connection diagram between the air inlet and the air flow channel of the present invention;

[0052] Fig.13 It is a schematic diagram of the bottom structure of the fourth shell of the present invention;

[0053] Fig.14 It is a 1 / 2 cross-sectional structural diagram of the fourth shell and a structural schematic diagram of the sealing strip of the present invention;

[0054] Fig.15 A circuit diagram of the throttling channel and the vacuum inlet and outlet connected to each other according to the present invention;

[0055] Fig.16 A drainage circuit diagram in the control assembly of the present invention;

[0056] Fig.17 It is a cross-sectional view of the power assembly of the present invention in a non-working state;

[0057] Fig.18 It is a cross-sectional view of the power assembly of the present invention in a working state;

[0058] Fig.19 A schematic diagram of the working principle of the execution component of the present invention;

[0059] Fig. 20 It is a cross-sectional view of the execution component of the present invention in a non-working state;

[0060] Fig.21 It is a cross-sectional view of the execution assembly of the present invention in a working state;

[0061] Fig. 22 This is a flow line diagram of the third upper end portion of the shell when draining water;

[0062] Fig.23 This is a flow line diagram when the lower end of the third shell body of the present invention is drained.

[0063] Among them: 01. Vacuum well, 02. A fully automatic pneumatic control device;

[0064] 1. Shell;

[0065] 11. Upper shell, 12. Middle shell, 13. Lower shell, 14. Air flow channel, 15. Air inlet, 16. Valve body air interface, 17. Valve body air control interface, 18. Vacuum inlet and outlet;

[0066] 101, first cavity, 102, second cavity, 103, third cavity, 104, fourth cavity, 1041, first upper chamber, 1042, first lower chamber, 105, fifth cavity, 106, sixth cavity, 1061, second upper chamber, 1062, second lower chamber;

[0067] 111, first inner hole, 112, second inner hole, 113, third inner hole, 114, fourth inner hole, 115, first gas path channel, 116, throttling channel;

[0068] 121, a first middle shell, 122, a second middle shell, 123, a third middle shell, 124, a fourth middle shell, 125, a fifth middle shell;

[0069] 1241, guide groove, 1242, sealing strip,

[0070] 2. Execution component;

[0071] 21. valve core body, 211. sealing pressure plate, 212. through groove, 22. first return spring, 23. first diaphragm, 24. rubber sealing ring;

[0072] 3. Power components;

[0073] 31. needle valve assembly, 311. needle valve body, 312. adjusting knob, 313. guide ring, 314. drainage groove, 315. concave cavity;

[0074] 32. Sliding valve assembly, 321. Valve stem, 322. Second return spring, 323. Second diaphragm, 324. Second air passage;

[0075] 4. Control components;

[0076] 41. liquid level pressure sensor, 42. voltage stabilizing buffer unit, 43. kinetic energy conversion unit, 44. connector, 45. seventh cavity, 46. third diaphragm, 47. flow guide hole, 48. sensor interface;

[0077] G01, input port, G02, output port, G03, air pipeline interface, G04, vacuum pipeline interface. DETAILED DESCRIPTION

[0078] The present invention is further described in detail below in conjunction with specific embodiments:

[0079] like Figure 1 As shown, a fully automatic pneumatic control device is used to be installed in the vacuum well 01, and is used to transport the sewage in the vacuum well 01 to the downstream vacuum collection pipeline network. Figure 1 Parts with the label "02" such as Figure 2 As shown, its structure includes a housing 1, an actuator 2 and a power assembly 3 installed in the housing 1, and a control assembly 4 that triggers the power assembly 3 to drive the actuator 2 to work; the actuator 2, the power assembly 3 and the control assembly 4 are distributed in sequence from top to bottom.

[0080] like Figure 3As shown, the shell 1 includes an upper shell 11, a middle shell 12 and a lower shell 13 which are arranged in sequence from top to bottom. In order to facilitate the processing of each space inside the middle shell 12, the middle shell 12 is designed to be a first middle shell 121, a second middle shell 122, a third middle shell 123, a fourth middle shell 124 and a fifth middle shell 125 which are arranged in sequence from top to bottom; the middle shell 12 is provided with a first cavity 101, a second cavity 102, a third cavity 103, a fourth cavity 104, a fifth cavity 105 and a sixth cavity 106 which are connected in sequence from top to bottom; wherein the first cavity 101 is arranged in the first middle shell 121; the second cavity 102 is arranged in the second middle shell 122, and a first inner hole 111 is arranged between the first cavity 101; the third cavity 103 and the fourth cavity 104 are arranged at the upper and lower ends of the third middle shell 123, and the third cavity 105 is provided with a sixth cavity 106 which is connected in sequence from top to bottom; wherein the first cavity 101 is arranged in the first middle shell 121; the second cavity 102 is arranged in the second middle shell 122, and a first inner hole 111 is arranged between the first cavity 101; the third cavity 103 and the fourth cavity 104 are arranged at the upper and lower ends of the third middle shell 123, and the third cavity 105 is provided with a sixth cavity 106 which is connected in sequence from top to bottom. A second inner hole 112 is provided between the cavity 103 and the second cavity 102, and a third inner hole 113 is provided between the third cavity 103 and the fourth cavity 104; the fifth cavity 105 is provided inside the fourth middle shell 124, and a throttling channel 116 communicating with the side wall of the fourth middle shell 124 is also provided; the sixth cavity 106 is provided at the lower end of the fifth middle shell 125, and a fourth inner hole 114 is provided between the sixth cavity 106 and the fifth cavity 105, and a first air path channel 115 communicating with the fourth inner hole 114 and the sixth cavity 106 at two ends thereof is provided on the side of the fourth inner hole 114; an air flow channel 14 is also provided inside the middle shell 12, and the air flow channel 14 sequentially passes through the first middle shell 121, the second middle shell 122, the third middle shell 123, the fourth middle shell 124 and the fifth middle shell 125, and is communicated with the second cavity 102 and the sixth cavity 106.

[0081] An air inlet 15, a valve body air interface 16, a valve body air control interface 17 and a vacuum inlet and outlet 18 are provided on the side wall of the middle shell 12, wherein the air inlet 15 is provided on the side wall of the fourth middle shell 124 and is connected to the air flow channel 14. For detailed connection principle, refer to the following "Connection between the air inlet 15 and the air flow channel 14"; the valve body air interface 16 is provided on the side wall of the first middle shell 121 for connecting with the vacuum drain valve and is connected to the air flow channel 14; Figure 4 As shown, the valve body air control interface 17 and the vacuum inlet and outlet 18 are arranged on the third middle shell 123 , the valve body air control interface 17 is connected to the third cavity 103 , and the vacuum inlet and outlet 18 is connected to the fourth cavity 104 .

[0082] The main function of the actuator 2 is to realize the continuous and intermittent connection of vacuum and air to the output port, that is, the valve body air control interface 17, so that the output port can finally realize the requirement of intermittent connection of vacuum and air in sequence, similar to a two-position three-way reversing valve; Figure 5As shown, its structure includes a valve core assembly for realizing air and vacuum on-off; the valve core assembly includes a valve core body 21, a first return spring 22 and a first diaphragm 23; the valve core body 21 sequentially penetrates the first inner hole 111, the second inner hole 112 and the third inner hole 113, and extends into the first cavity 101, the second cavity 102, the third cavity 103 and the fourth cavity 104, and the inner walls of the first inner hole 111, the second inner hole 112 and the third inner hole 113 are all nested with a rubber sealing ring 24 for forming a seal with the side wall of the valve core body 21; the valve core body 21 in the third cavity 103 is provided with a sealing pressure plate 211 in an integrated structure, as shown in FIG. Figure 6 As shown, through grooves 212 are provided on the side walls of the valve core body 21 at the upper and lower ends of the sealing pressure plate 211; the first return spring 22 is sleeved on the outer wall of the valve core body 21 in the second cavity 102; the first diaphragm 23 is arranged in the fourth cavity 104, the middle part is fixedly connected to the lower end of the valve core body 21, and the outer end along the circumferential direction is fixedly connected to the inner wall of the fourth cavity 104, and the fourth cavity 104 is divided into a first upper chamber 1041 and a first lower chamber 1042, wherein the middle part of the first diaphragm 23 is fixedly connected to a pair of connecting plates by a locking screw at the lower end of the valve core body 21, and the middle end of the first diaphragm 23 is fixed between the pair of connecting plates; the outer end of the first diaphragm 23 is fixedly provided with a protrusion in a ring shape, which is nested and clamped between the third middle shell 123 and the fourth middle shell 124.

[0083] The main function of the power component 3 is to realize intermittent connection of vacuum and air to the actuator 2 under the control of the control component 4 to meet the requirements of fast switching, similar to a two-position two-way reversing valve or a two-position three-way reversing valve; Figure 7 As shown, its structure includes a needle valve assembly 31 for achieving delayed closing and a slide valve assembly 32 for achieving rapid opening; the needle valve assembly 31 is nested and matched in the throttling channel 116, including a needle valve body 311 extending into the fifth cavity 105 and an adjusting knob 312 fixed to the side of the needle valve body 311 away from the fifth cavity 105, and a guide ring 313 is also provided at the lower end of the inner side of the fifth cavity 105, as shown in FIG. Figure 8 , Fig. 9As shown, the lower end surface of the guide ring 313 has a concave cavity 315 arranged in an annular shape, and the upper end is evenly provided with a plurality of drainage grooves 314 extending from the upper end surface into the concave cavity in an arc shape, wherein the concave cavity 315 is connected with the throttling channel 116; the throttling channel 116 is connected with the vacuum inlet and outlet 18, and the detailed connection principle is referred to the following "Connection between the throttling channel 116 and the vacuum inlet and outlet 18"; the sliding valve assembly 32 includes a valve stem 321, a second return spring 322 and a second diaphragm 323; the valve stem 321 is nested and slidably matched with the fourth inner hole 114, and a second air path 324 is arranged between the side wall and the upper end surface; the second return spring 322 is arranged in the fourth inner hole 114 at the upper end of the valve stem 321; the second diaphragm 323 is arranged in the sixth cavity 106, the middle part is fixedly connected to the lower end of the valve stem 321, and the outer end along the circumferential direction is fixedly connected to the inner wall of the sixth cavity 106, and the sixth cavity 106 is divided into a second upper chamber 1061 and a second lower chamber 1062.

[0084] The control component 4 includes a liquid level pressure sensor 41, a voltage stabilizing buffer unit 42 and a kinetic energy conversion unit 43. The main function is to change the volume of the internal related space under the control of the liquid level pressure sensor 41, thereby triggering the power component 3 to work, and finally driving the execution component 2 to complete the action; Fig.10 As shown, a connector 44 is fixed to the lower end of the lower shell 13, a seventh cavity 45 is provided between the upper end of the connector 44 and the lower end surface of the lower shell 13, a guide hole 47 is provided between the seventh cavity 45 and the sixth cavity 106, and a sensor interface 48 is provided between the seventh cavity 45 and the side wall; Figure 1 As shown, the lower end of the liquid level pressure sensor 41 extends to the lower end of the vacuum well 01, and the upper end is connected to the sensor interface 48; Fig.10 As shown, the voltage-stabilizing buffer unit 42 includes an area formed by a connector 44 and a seventh cavity 45, a third diaphragm 46 is arranged in the seventh cavity 45, the outer end of the third diaphragm 46 along the circumferential direction is fixedly connected to the inner wall of the seventh cavity 45, and a through hole connecting the upper and lower ends of the third diaphragm 46 is arranged on the end face; the kinetic energy conversion unit 43 includes an area formed by the sixth cavity 106 and the second diaphragm 323.

[0085] In this embodiment, the structural principle of the pipeline connection is as follows:

[0086] (1) Communication between the air inlet 15 and the air flow channel 14:

[0087] like Fig.11 As shown, there is an arc-shaped gas flow channel between the first middle shell 121 and the second middle shell 122, and between the second middle shell 122 and the third middle shell 123. When air enters from the air inlet 15, it passes through the third middle shell 123 (as shown in FIG. Fig.11 and Fig.12Point A shown in the figure) and flows into the two layers of gas flow channels (as shown in the figure). Fig.11 The two arc-shaped flow paths in the middle) and then enter the first middle shell 121 (such as Fig.11 and Fig.12 The point B shown in FIG. 1 is connected to the air flow channel 14. At this time, the air inlet 15 is connected to the air flow channel 14. The connecting route is as shown in FIG. Fig.11 , Fig.12 As shown by the dotted line in .

[0088] (2) Communication between the throttling channel 116 and the vacuum inlet and outlet 18:

[0089] like Fig.13 As shown, the lower end surface of the fourth middle shell 124 has a guide groove 1241, and the two ends of the guide groove 1241 are respectively point C and point D, wherein point C is located on the side deviated to the throttling channel 116 and is connected to the throttling channel 116, and point D runs through the fourth middle shell 124. Fig.14 As shown, the lower end of the guide groove 1241 has a sealing strip 1242 with the same shape as the guide groove 1241; Fig.15 As shown, the first middle shell 121, the second middle shell 122 and the third middle shell 123 are provided with a first vacuum flow channel connected to the point D, and the upper ends of the first middle shell 121, the second middle shell 122 and the third middle shell 123 are provided with a second vacuum flow channel connected to the vacuum inlet and outlet 18, and the upper end of the first middle shell 121 has a third vacuum flow channel in an annular shape, which is used to connect the first vacuum flow channel and the second vacuum flow channel, and finally the throttling channel 116 can be connected with the vacuum inlet and outlet 18. The connecting route is as shown in FIG. Fig.15 As shown by the dotted line in .

[0090] In this embodiment, the working principle of each component is as follows:

[0091] (1) Control component 4:

[0092] a. Liquid level pressure sensor 41: When the liquid level in the vacuum well 01 reaches the high limit set by the liquid level pressure sensor 41, the fully automatic pneumatic control device starts to discharge sewage. When the liquid level gradually drops to the lowest point, air enters the liquid level pressure sensor 41, and the kinetic energy conversion unit 43 involved below will be quickly reset. Since the liquid level pressure sensor 41 belongs to the prior art and is a kinetic energy conversion mode based on a diaphragm structure, the present invention will not elaborate on its more detailed working principle.

[0093] b. Voltage stabilizing buffer unit 42: Fig.16As shown, when the liquid level pressure sensor 41 reaches a low liquid level, the accumulated water in the sewage suction pipeline flows back to impact the liquid level pressure sensor 41 and cause a large fluctuation in the liquid level. The presence of the voltage stabilizing buffer unit 42 can effectively reduce its sensitivity to air pressure fluctuations in the liquid level sensor.

[0094] c. Kinetic energy conversion unit 43: Fig.16 As shown, the kinetic energy conversion unit 43 is composed of a second diaphragm 323, with air passing through the top and a liquid level pressure sensor 41 controlling the pressure passing through the bottom, and the second upper chamber 1061 passing through air and the second lower chamber 1062 controlling the pressure; when the liquid level is at the lowest point, air enters the liquid level pressure sensor 41, and the kinetic energy conversion unit 43 is quickly reset.

[0095] d. Drainage working principle: The inlet and outlet of the kinetic energy conversion unit 43 are located at the bottom, and the third diaphragm 46 in the voltage stabilizing buffer unit 42 is provided with a through hole, which can play a role in drainage. Therefore, the guide hole 47 below it can be used as a ventilation inlet and outlet, and can also be used as a drainage outlet. The specific drainage path is as follows: Fig.16 As shown by the dotted line in .

[0096] (2) Power assembly 3:

[0097] In the non-working state: the kinetic energy conversion unit 43 is in a reset state, at this time, the first gas path channel 115 and the second gas path channel 324 are not connected, the valve stem 321 is in the air normally closed mode, and the second reset spring 322 is also in a reset state; at the same time, the gas in the fifth cavity 105 is discharged after passing through the needle valve assembly 31; because the vacuum inlet and outlet 18 is connected to the throttling channel 116 and connected to the fifth cavity 105, the fifth cavity 105 is in a vacuum state at this time, and the internal flow route is as follows Fig.17 As shown by the dotted line in the figure, the throttling effect of the needle valve assembly 31 can realize the function of delaying the reset closing of the actuator 2.

[0098] In the working state: the control pressure of the second lower chamber 1062 is greater than the air pressure of the second upper chamber 1061, such as Fig.18 As shown, the valve stem 321 moves upward, and the first air passage 115 and the second air passage 324 are connected. The air enters the second upper chamber 1061 from the air flow channel 14, enters the second air passage 324 through the first air passage 115, and finally enters the fifth cavity 105. At this time, the fifth cavity 105 is in an air-passing state, and the internal circulation route is as shown in FIG. Fig.18 As shown by the dotted line in .

[0099] (3) Execution component 2:

[0100] like Fig.19As shown, it is a simplified structural diagram of the actuator assembly, which shows the second cavity 102, the third cavity 103, the fourth cavity 104 and the fifth cavity 105 arranged in sequence from top to bottom, the valve core body 21 that penetrates the second cavity 102, the third cavity 103 and the fourth cavity 104, the first return spring 22 that is sleeved on the outside of the valve core body 21, the sealing pressure plate 211 that is arranged in an integral structure with the valve core body 21, and the first diaphragm 23 that is connected to the lower end of the valve core body, wherein the sealing pressure plate 211 is arranged in the third cavity 103, and the first diaphragm 23 is arranged between the fourth cavity 104 and the fifth cavity 105; further, the fifth cavity 105 is connected with an input port G01, and the input port G01 is acted upon by the power assembly 3 to realize intermittent connection between vacuum and air, that is, vacuum is passed in the non-working state and air is passed in the working state; the third cavity 103 is connected with an output port G02, that is, the valve body air control interface 17; the second cavity 102 is connected with an air pipeline interface G03, that is, the air inlet 15; the fourth cavity 104 is connected with a vacuum pipeline interface G04, that is, the vacuum inlet and outlet 18.

[0101] In the non-working state: that is, the fifth cavity 105 is in vacuum, because the fifth cavity 105 is connected to the first lower chamber 1042, the first lower chamber 1042 is in vacuum at this time, and the valve core body 21, under the action of the first return spring 22, makes the sealing pressure plate 211 contact and seal with the upper end surface of the rubber sealing ring 24 in the third inner hole 113, thereby causing the first upper chamber 1041 where the vacuum inlet and outlet 18 is located to be unable to communicate with the third cavity 103 where the valve body air control interface 17 is located; at the same time, the air in the air flow channel 14 is connected to the third cavity 103 through the second cavity 102 and the through groove 212 on the side wall of the valve core body 21, thereby realizing the connection between the air and the valve body air control interface 17, and at this time the vacuum drain valve connected thereto is reset and closed, such as Fig. 20 The figure shows the air circulation route map.

[0102] In the working state: that is, the fifth cavity 105 is connected with the first lower cavity 1042, and the first lower cavity 1042 is connected with the air at this time. The first upper cavity 1041 and the first lower cavity 1042 generate an upward moving force due to the pressure difference. After the force overcomes the first return spring 22, the sealing pressure plate 211 contacts and seals with the lower end surface of the rubber sealing ring 24 in the second inner hole 112, thereby causing the second cavity 102 where the air is located to be unable to communicate with the third cavity 103 where the valve body air control interface 17 is located; at the same time, the first upper cavity 1041 where the vacuum inlet and outlet 18 is located is connected with the third cavity 103 through the through groove 212 on the side wall of the valve core body 21, and then connected to the valve body air control interface 17. At this time, the vacuum drain valve connected thereto is opened to realize the discharge or circulation of sewage, such as Fig.21 The figure shows the vacuum flow circuit diagram.

[0103] Working principle of water collection and drainage: It can be seen from the airflow direction in the working state that the airflow flows from top to bottom. Due to the offset of the valve body air control interface 17, the airflow from the valve body air control interface 17 enters the third cavity 103 in a counterclockwise direction (counterclockwise direction is Figure 4 As a reference), and gradually flows along the peripheral area to the middle area, thereby facilitating the emptying of the accumulated water in the chamber; since the lower end of the third inner hole 113 is provided with an annular notch, such as Fig. 22 As shown, the liquid flows through the annular notch in a counterclockwise direction to the first upper chamber 1041 (the counterclockwise direction is based on the top view direction of the third middle shell 123), as shown Fig.23 As shown, the water vapor is ejected in a clockwise direction in radial and tangential directions through the jet action of the annular notch (the clockwise direction is referenced to the upward viewing direction of the third middle shell 123), and then discharged tangentially along the outer peripheral area of ​​the first upper chamber 1041 to the vacuum inlet and outlet 18, and then enters the subsequent vacuum pipeline system, ultimately ensuring the discharge of condensed water vapor inside the device and the air control chamber in the vacuum drain valve.

[0104] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A fully automatic pneumatic control device, characterized in that: It includes a housing, an actuator and a power assembly installed in the housing, and a control assembly that triggers the power assembly to drive the actuator to work; the actuator, power assembly and control assembly are arranged in order from top to bottom; the actuator includes a valve core assembly for realizing air and vacuum on and off; the power assembly includes a needle valve assembly for realizing delayed closing and a slide valve assembly for realizing fast opening; the control assembly includes a liquid level pressure sensor, a voltage stabilizing buffer unit and a kinetic energy conversion unit; The shell comprises an upper shell, a middle shell and a lower shell arranged in sequence from top to bottom, and the middle shell comprises a first middle shell, a second middle shell, a third middle shell, a fourth middle shell and a fifth middle shell arranged in sequence from top to bottom; the middle shell is provided with a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity and a sixth cavity connected in sequence from top to bottom, a first inner hole is provided between the first cavity and the second cavity, a second inner hole is provided between the second cavity and the third cavity, a third inner hole is provided between the third cavity and the fourth cavity, a fourth inner hole is provided between the fifth cavity and the sixth cavity, and a first air path is provided on the side of the fourth inner hole, with two ends respectively connected to the fourth inner hole and the sixth cavity; an air flow channel is also provided inside the middle shell, and an air inlet and a valve body air interface connected to the air flow channel, a valve body air control interface connected to the third cavity, and a vacuum inlet and outlet connected to the fourth cavity are provided on the side wall, and the air flow channel is also connected to the second cavity and the sixth cavity; The valve core assembly includes a valve core body, a first return spring and a first diaphragm; the valve core body sequentially passes through the first inner hole, the second inner hole and the third inner hole, and extends into the first cavity, the second cavity, the third cavity and the fourth cavity; the valve core body in the third cavity is provided with a sealing pressure plate in an integrated structure, and through grooves are provided on the side walls of the valve core body at the upper and lower ends of the sealing pressure plate; the first return spring is sleeved on the outer wall of the valve core body in the second cavity; the first diaphragm is arranged in the fourth cavity, and the middle part is fixedly connected to the lower end of the valve core body; The sliding valve assembly includes a valve stem, a second return spring and a second diaphragm; the valve stem is nested and slidably matched with the fourth inner hole, and a second air path is provided between the side wall and the upper end surface; the second return spring is arranged in the fourth inner hole at the upper end of the valve stem; the second diaphragm is arranged in the sixth cavity, and the middle part is fixedly connected to the lower end of the valve stem; A connecting head is fixed to the lower end of the lower shell, a seventh cavity is arranged between the upper end of the connecting head and the lower end surface of the lower shell, a guide hole is arranged between the seventh cavity and the sixth cavity, and a sensor interface connected to the side wall is arranged; the liquid level pressure sensor is connected to the sensor interface; the voltage stabilizing buffer unit includes the area formed by the connecting head and the seventh cavity, a third diaphragm is arranged in the seventh cavity, the outer end of the third diaphragm along the circumferential direction is fixedly connected to the inner wall of the seventh cavity, and a through hole connecting the upper and lower ends of the third diaphragm is arranged on the end face; the kinetic energy conversion unit includes the area formed by the sixth cavity and the second diaphragm.

2. A fully automatic pneumatic control device according to claim 1, characterized in that: The inner walls of the first inner hole, the second inner hole and the third inner hole are all nested with rubber sealing rings for forming a seal with the side wall of the valve core body.

3. A fully automatic pneumatic control device according to claim 1, characterized in that: The outer end of the first diaphragm along the circumferential direction is fixedly connected to the inner wall of the fourth cavity, and divides the fourth cavity into a first upper chamber and a first lower chamber.

4. A fully automatic pneumatic control device according to claim 1, characterized in that: The outer side end of the second diaphragm along the circumferential direction is fixedly connected to the inner wall of the sixth cavity, and divides the sixth cavity into a second upper chamber and a second lower chamber.

5. A fully automatic pneumatic control device according to claim 1, characterized in that: A throttling channel connected to the fifth cavity is arranged on the side wall of the middle shell body opposite to the fifth cavity, and the throttling channel is connected to the vacuum inlet and outlet; the needle valve assembly is nested in the throttling channel, including a needle valve body extending into the fifth cavity and an adjusting knob fixed on the side of the needle valve body away from the fifth cavity.

Images