CN111809706B - A sewage tank ventilation type vacuum well - Google Patents

Abstract

The invention relates to a sewage tank ventilation type vacuum well, which is used for collecting sewage at a sewage source and discharging it into a downstream sewage treatment pipe network. The structure thereof comprises a well body, a pneumatic controller installed in the well body, a vacuum sewage discharge valve and a liquid level sensor, a sewage pipe system connected to the well body, and a ventilation pipe system; wherein the liquid level sensor is used for sensing the rise and fall of the water level, thereby driving the pneumatic controller to drive the vacuum sewage discharge valve to work, and the pneumatic controller can be used for ventilation, water collection and drainage, and has an integrated structure with a compact structure; the sewage pipe system comprises a gravity sewage inlet pipe, and when the ventilation pipe system is connected to the gravity sewage inlet pipe, water resistance will be generated due to the provision of a lifting elbow on the gravity sewage inlet pipe, and therefore a pressure relief device is also provided, which is used for ventilation of the vacuum sewage discharge valve and the pneumatic controller, pressure relief of the air above the sewage cavity, and drainage, thereby improving the tolerance to water resistance on the gravity sewage inlet pipe.

Description

Sewage tank ventilation type vacuum well

Technical Field

The invention relates to the technical field of a vacuum sewage continuous collection, temporary storage and periodic conveying system, which is a vacuum well system, is provided with a temporary sewage collection tank for periodic sewage discharge by a vacuum sewage discharge valve, can convey sewage in the sewage collection tank to a downstream vacuum collection pipeline network, the invention relates to a sewage tank ventilation type vacuum well, which is characterized in that a control device applying a differential pressure driving control method is used for controlling, and the components of the control device generally comprise a vacuum sewage valve, a sewage tank, an equipment tank, a well cover, a manual ball valve, a gravity sewage inlet pipeline, a sewage draining pipeline connected with a downstream vacuum collecting pipeline network and a sewage suction pipeline.

Background

In the technical field of liquid or sewage collection, a vacuum technology is a conventional technology, although the domestic technology accumulation time is relatively short, the technical development in recent years is rapid, and a special aspect in the field is the ventilation, water collection and drainage working mechanism and method of a vacuum blow-down valve and a pressure difference driven controller in a vacuum well, wherein the method comprises the following application fields: domestic sewage (such as black water represented by waste water sources such as urinal, toilet bowl, etc. and grey water represented by waste water sources such as kitchen, changing and bathing etc.) from buildings (such as rural flat houses, tile houses, buildings, cement houses, villas, and urban residential buildings, high buildings, mansion, etc.) is delivered to a remote sewage tank or vacuum collection and delivery pipeline system by means of a pipe based on the principle of vacuum or negative pressure air flow delivery force of sucking air at one end and exhausting air at the other end.

A typical technical solution for implementing the application scenario is to use a temporary sewage tank with an inlet connected to a building sewage outlet, a sewage suction inlet connected to a vacuum sewage delivery line, and a vacuum sewage valve connecting the sewage suction inlet to the vacuum sewage delivery line, the vacuum sewage valve having a control system or device whose basic operational flow is that when the sewage level in the tank reaches a first preset value, the controller applies a vacuum force to the vacuum sewage valve to suck away and empty the sewage until the sewage level in the sewage tank falls to another preset value, the control system closes the vacuum sewage valve, we define this technical solution as a vacuum sewage continuous collection, temporary storage and periodic delivery system, i.e. a vacuum well.

In general, in the field of liquid or sewage collection technology, a vacuum technology is a known technology for collecting liquid or sewage, and in the past 130 years, a great deal of foreign patent literature relates to the subdivision technology field, and although the domestic technology accumulation time is relatively short, development in recent years is rapid, and one special aspect in the field is the ventilation, water collection and drainage working mechanism and method of a vacuum blow-down valve and a pressure difference driven controller in a vacuum well; currently, for the development of foreign technologies, it is known that vacuum sewer valves in vacuum wells and their controllers require a large amount of air for reliable operation, but the following drawbacks still exist:

(1) U.S. Pat. No.3, 5069243: the ventilation problem of the vacuum blow-down valve and the controller in the vacuum well is realized by providing a ventilation pipeline near the vacuum well, but the scheme needs to construct a ventilation facility on the ground near the vacuum well, occupies the ground space and affects the traffic operation;

(2) U.S. Pat. nos. US469173 and US5570715: providing a novel vacuum well sewage tank ventilation and drainage method, namely a ventilation pipeline which is arranged near a building, is integrated with a gravity sewage collecting pipeline and is above the ground, wherein the gravity sewage collecting pipeline is used for collecting sewage of the building into a vacuum well by means of gravity flow; although the vacuum well sump ventilation and drainage method omits ground ventilation facilities near the vacuum well, there are also many problems such as high cost and poor functionality; in the scheme, an additional pipeline is needed to communicate the sewage tank chamber with the vacuum sewage valve and the controller thereof, and under certain conditions, sewage can enter the controller and the vacuum sewage valve, so that products are damaged and maintenance is needed; more seriously, the air from the sewage tank below in the vacuum well is often moist and sometimes hot and humid, so that condensation water is generated in the vent line, thereby affecting and controlling the use of the valve and controller;

(3) European Union patent EP0990743A2: by arranging a ventilation interface on a sealing partition plate between a sewage tank and an equipment cavity in the vacuum well, a floating ball liquid level valve is arranged in the ventilation interface, so that ventilation of an upper cavity and a lower cavity is usually allowed, and when sewage reaches a high water level, the ventilation opening is closed, so that sewage is prevented from entering the upper cavity. The scheme solves the problems existing in the prior art to a certain extent, but it is well known that sewage contains a large amount of impurities, the impurities in the sewage enter the floating ball assembly and not only corrode the floating ball and the rubber sealing ring, but also the impurities in the sewage adhere near the matching surface of the plug to cause the failure of the on-off function of the floating ball liquid level valve, so that the function is invalid; moreover, as the embodiment of the scheme is used for avoiding the cost required by customizing the well cover, a traditional well cover which is not sealed (with a vent pipe and a pipeline) is adopted, and then the water on the ground can enter the upper cavity to pollute the controller; more seriously, this solution, while provided with a total vent filter, the inlet of the filter is directed upwards, which further causes the collection of condensate water and its entry into the pipeline.

However, the domestic situation is weak in technical accumulation due to short technological development, the overall development is not optimistic, and the following disadvantages exist:

(1) Chinese invention patent CN105507410B, CN105484351B, CN208379743U: the adopted technical scheme is different in size, and basically adopts a mechanical electronic controller, a liquid level sensor consisting of an induction pipe and an induction valve, a collecting tank, a sealing well cover and a gravity sewage collecting inlet pipeline pipe distribution method; wherein, the electronic controller is positioned in a control column which is independently and separately arranged on the ground and the vacuum well; the liquid level sensor is a mechanical or electronic liquid level sensor, such as a floating ball liquid level meter; the collecting tank is arranged at the bottom, plays a role in shielding sludge and collecting sewage, and reduces the influence on the induction tube in the liquid level sensor to a certain extent; a gravity sewage collection inlet pipeline pipe distribution method;

the problems of the method are as follows: the lever component in the floating ball level gauge is easily influenced by impurities in sewage, for example, the lever cannot act due to hair winding, so that the reliability is poor; the standby manual sewage discharge pipeline increases the cost of the product and reduces the reliability; the existence of the filtering net cover increases the circulation resistance of sewage with impurities, and particularly, the scheme II divides the sewage pool of the vacuum collecting well into two independent cavities and filters the sewage by using the filtering net cover, and the measures are not beneficial to the sewage in the sewage tank to flow into the suction inlet and be discharged into the vacuum conveying pipeline network due to the gas-liquid-solid impurities in the sewage of a carrier under the power action of gravity flow, and are not beneficial to automatic treatment and control; more seriously, as the well cover is sealed, the vacuum sewage draining valve needs to further suck a certain amount of air to realize the mixing of gas and liquid according to the optimal proportion after the sewage in the sewage tank is drained, thereby being beneficial to the high-speed conveying of the sewage in the follow-up of the vacuum well; however, because the technical scheme can not effectively supplement extra needed air from the wellhead in time, the air pressure above the sewage of the vacuum well is lower than the atmospheric pressure, so that the action of the liquid level air pressure sensor is influenced, even misoperation of a controller is caused, and the use of the vacuum well is influenced; the existence of the electrified component also reduces the reliability of equipment, and particularly, the air in a vacuum well buried underground is mostly dark and moist air, so that the service life of a battery is greatly reduced, and the product is maintained and replaced in the later period and is troublesome.

(2) Chinese invention patent CN102121271B: the technical scheme is that an electronic controller, a liquid level sensor consisting of an induction pipe and an induction valve, a collecting tank, a sealing well cover and a horizontal sewage collecting inlet pipeline pipe distribution method are adopted; wherein, the electronic controller is positioned in a control column which is independently and separately arranged on the ground and the vacuum well; the liquid level sensor is a mechanical or electronic liquid level sensor, the collecting tank is arranged at the bottom, the effects of shielding sludge and collecting sewage are achieved, and the influence on the induction tube in the liquid level sensor is reduced to a certain extent;

The problems of the method are as follows: part of electric components in the single chip microcomputer controller and the electric liquid level sensor are easily influenced by sewage to fail, the battery is used as power to be replaced on time, the wiring is troublesome and the cost is high in a mode of using the commercial power as power, more importantly, the configuration of the electric power and the power supply increases the potential safety hazard and the cost, the labor intensity is maintained, and the electric shock hazard is easy to occur, especially in the process of inspection and maintenance and the manual damage condition; the control column protruding out of the ground occupies the installation space, affects the appearance and appearance of the city, affects the road traffic, and has the danger of being damaged by the collision of vehicles; the existence of the collecting tank is not beneficial to the air entering the sewage collecting pipeline system, so that the sewage conveying efficiency is reduced, and the running cost of the conveyed vacuum sewage conveying system is further increased; the horizontal sewage collecting inlet pipeline pipe distribution method is used for guiding sewage from a building into a sewage tank below a vacuum well by using a pipe, and the pipe distribution efficiency is high, but the back pressure of a water inlet pipeline of the vacuum well is high, the flow velocity of water is low, and the vacuum well is easy to block.

(3) Chinese utility model patent CN208777412U: the technical scheme is that an electronic controller, a liquid level pressure sensor, a sealing well cover, a horizontal sewage collecting inlet pipeline pipe distribution method and a split vacuum well structure are adopted; the electronic controller is located on the ground and is in a modularized structure in a control column which is independently and separately installed with the vacuum well, and the equipment cavity and the sewage cavity are hermetically designed into a split type vacuum well structure; the vacuum well is mainly structurally characterized by comprising a lower sewage collecting tank (or a sewage collecting cavity and a sewage collecting area) for periodically discharging sewage by adopting a vacuum sewage discharging valve, and an equipment tank (or an equipment cavity) which is arranged on the collecting tank and used for storing equipment such as the vacuum sewage discharging valve, wherein the collecting tank and the equipment tank can be coaxial integrated or split, or coaxial integrated or split;

The problems of the method are as follows: ① Part of electric components in the singlechip controller are easily influenced by sewage to fail, the battery is used as power to be replaced on time, the mains supply is used as power to be connected with the power, the wiring is troublesome and the cost is high, more importantly, the potential safety hazard and the cost are increased due to the arrangement of the electric power and the power supply, the labor intensity is maintained, and the electric shock hazard is easy to occur, particularly in the process of inspection and maintenance and the artificial damage condition; ② The control column protruding out of the ground occupies the installation space, affects the appearance and appearance of the city, affects the road traffic, and has the danger of being damaged by the collision of vehicles; ③ The sealing design of the equipment cavity and the sewage cavity is seemingly beneficial to preventing sewage in the sewage cavity from entering the equipment cabin, and the equipment cabin is clean and fresh, but the consequence of the sealing design is that the sealing design is unfavorable for air entering the sewage collecting pipeline system through the sewage suction port, so that the essence of a vacuum conveying technology for three-phase gas-liquid-solid turbulent conveying of air, sewage and solid garbage is realized, the efficiency of sewage conveying is reduced, and the running cost of a conveyed vacuum sewage conveying system is further increased; ④ The horizontal sewage collecting inlet pipeline pipe distribution method is used for guiding sewage from a building into a sewage tank below a vacuum well by using a pipe, and the pipe distribution efficiency is high, but the back pressure of a water inlet pipeline of the vacuum well is high, the flow velocity of water is low, and the vacuum well is easy to block; ⑤ The split vacuum well structure has the advantages of complex structure and high manufacturing cost, and particularly, a sewage tank is blocked, so that the split vacuum well structure is inconvenient to disassemble and maintain; more seriously, the sewage collection tank has small capacity, so that the vacuum well is started frequently, and the service lives of the controller and the vacuum drain valve are shortened.

(4) Chinese invention patent application CN108488443a: the technical scheme is that a pneumatic controller with a high-low liquid level pressure sensor is adopted; the two high-low liquid level pressure sensors are used for detecting high liquid level pressure and low liquid level pressure;

the problems of the method are as follows: the high-low liquid level pressure sensor occupies large space and has high cost; although the pneumatic controller can be regulated in a time delay manner, the pneumatic controller needs to be disassembled to replace two springs, so that the pneumatic controller is too troublesome; the pneumatic controller does not solve the problem that water vapor influences corrosion of a valve core of the controller; the controller can not solve the problem of misoperation of the controller caused by liquid level fluctuation; the controller can not solve the problem that the pneumatic controller is misoperation due to the pressure fluctuation of the vacuum air taking port caused by the pressure fluctuation of the vacuum pipeline when the vacuum valve is opened; meanwhile, the controller cannot solve the problem of diagnosing the fault condition of the vacuum valve in the manual inspection process on the premise of not disassembling the pneumatic controller.

Aiming at the problems of the prior art, such as a plurality of and complicated equipment parts, complex functions, large potential safety hazards, poor reliability (caused by pressure fluctuation of a gas taking port, on-off of a vacuum blowoff valve, liquid level fluctuation, condensation water in a vacuum blowoff valve and a controller thereof, and the like), high cost, unadjustability or inconvenient adjustment, limited installation, high maintenance cost, a sewage collection inlet pipeline pipe distribution method, and the like, the invention develops a sewage tank ventilation type vacuum well to solve the problems in the prior art, and the technical scheme which is the same as or similar to the invention is not found through searching.

Disclosure of Invention

The invention aims at: the utility model provides a sewage tank ventilation type vacuum well to solve among the prior art vacuum well have that structural function is complicated, the potential safety hazard is big, the reliability is poor and input cost is too high scheduling problem.

The technical scheme of the invention is as follows: a sewage tank ventilation type vacuum well comprises a well body, a pneumatic controller, a vacuum blow-down valve, a liquid level sensor, a sewage pipeline system and a ventilation pipeline system, wherein the pneumatic controller, the vacuum blow-down valve and the liquid level sensor are arranged in the well body; the well body comprises a sewage cavity, an equipment cavity and a sealing well cover which is covered at the upper end; the pneumatic controller, the vacuum blow-off valve and the liquid level sensor are all arranged in the equipment cavity; the sewage pipeline system comprises a gravity sewage inlet pipeline communicated with the sewage cavity, a sewage suction pipeline connected with the vacuum sewage discharging valve and a vacuum conveying pipeline; the vent line system includes a vent line extending to an upper end of the ground.

Preferably, the pneumatic controller comprises a pneumatic control shell, an executing mechanism and a control mechanism, wherein the executing mechanism and the control mechanism are arranged in the pneumatic control shell; the side wall of the pneumatic control shell is provided with an air inlet, a vacuum blowoff valve air interface A and a vacuum blowoff valve pneumatic control interface A, and the bottom of the pneumatic control shell is provided with a liquid level sensor interface A, a vacuum inlet and outlet A and a condensate water outlet; the actuating mechanism is used for intermittently communicating the pneumatic control interface of the vacuum sewage valve with the air inlet and the vacuum inlet and outlet, and structurally comprises a first valve rod, a first sealing piece and a first diaphragm; the control mechanism is connected with the liquid level sensor interface and used for driving the actuating mechanism to work, and the structure of the control mechanism comprises a second valve rod, a second sealing piece and a second diaphragm;

The vacuum sewage valve comprises a sewage shell and a sewage membrane arranged in the sewage shell; the two ends of the sewage draining shell are provided with a water inlet interface and a water outlet interface which are communicated with the inside of the sewage draining shell, the side wall is provided with a vacuum sewage draining valve air interface B, the upper end is provided with a vacuum sewage draining valve air control interface B, the water inlet port is communicated with the sewage suction pipeline, the water outlet port is communicated with the vacuum conveying pipeline and is provided with a manual ball valve, and a vacuum inlet and outlet B is arranged on the side wall of the water outlet port;

The liquid level sensor comprises a liquid level circulation pipeline and a liquid level sensor interface B arranged at the end part of the upper end of the liquid level circulation pipeline, and the liquid level circulation pipeline extends into the sewage cavity;

The vacuum blowoff valve air interface A is communicated with the vacuum blowoff valve air interface B, the vacuum blowoff valve air control interface A is communicated with the vacuum blowoff valve air control interface B, the vacuum inlet and outlet A and the vacuum inlet and outlet B, the liquid level sensor interface A and the liquid level sensor interface B are communicated through pipelines in sequence.

Preferably, the vacuum blowoff valve is fixedly connected with the pneumatic controller through a hoop, and the fixing mode adopts one of vertical connection or parallel arrangement in the horizontal direction.

Preferably, the vent pipe is communicated with the equipment cavity, the upper end of the vent pipe extends to the position above the ground, and the part extending to the position above the ground is arranged in a wall pasting or mounting mode inside the wall.

Preferably, the breather pipe is communicated with the gravity sewage inlet pipeline, the upper end of the breather pipe extends above the ground, the part extending above the ground is arranged in a wall pasting or wall mounting mode, and a lifting bent pipe is arranged on the gravity sewage inlet pipeline between the lower end part and the well body.

Preferably, a pressure relief device is arranged in the equipment cavity, and is arranged on one side, far away from the gravity sewage inlet pipeline, of the well body, and the structure of the pressure relief device comprises a pressure relief shell, a ventilation assembly and a sealing assembly, wherein the ventilation assembly and the sealing assembly are arranged in the pressure relief shell; the pressure release shell is internally provided with a cavity, and the lower end of the pressure release shell extends into the sewage cavity and is communicated with the sewage cavity; the ventilation assembly comprises a ventilation ring, a connecting seat and a ventilation seat, wherein the ventilation ring is attached to the inner wall of the cavity, the connecting seat is arranged in the ventilation ring in a nested manner, and the ventilation seat is arranged at the upper end part of the connecting seat in a nested manner; the middle part of the ventilation seat is provided with a pressure relief pipeline which is communicated with the sewage cavity by using a ventilation ring and a connecting seat, and the upper end of the ventilation seat is provided with a connecting port which is communicated with the pressure relief pipeline; the sealing assembly is nested to be arranged at the lower end part of the connecting seat and comprises a sealing valve rod, a sealing diaphragm and a reset spring, wherein the sealing valve rod is arranged below the pressure relief pipeline and is coaxially arranged with the pressure relief pipeline.

Preferably, a plurality of ventilation grooves are uniformly distributed on the side wall of the ventilation ring along the central axis direction of the pressure relief shell; an upper cavity and a lower cavity are arranged in the connecting seat, and a plurality of vent holes communicated with the vent grooves are uniformly distributed on the side wall of the connecting seat corresponding to the upper cavity; the ventilation seat is nested to be arranged in the upper cavity, the pressure relief pipeline in the middle is communicated with the ventilation hole, and the sealing assembly is nested to be arranged in the lower cavity.

Preferably, the upper end of the sealing valve rod is provided with a plug, and the lower end of the pressure relief pipeline is provided with a lip-shaped sealing ring which forms sealing with the plug.

Preferably, the pressure relief device and the liquid level sensor adopt split structural design, the liquid level sensor is fixedly connected with the vacuum drain valve through the anchor ear, the pressure relief device is installed in the equipment cavity, one end of the connecting port is communicated with an air inlet on the side of the pneumatic controller, and the other end of the connecting port is communicated with the equipment cavity.

Preferably, the pressure relief device and the liquid level sensor adopt a combined structure design, the liquid level sensor comprises a liquid level circulation pipeline and a liquid level sensor interface B, the liquid level circulation pipeline penetrates through the pressure relief shell, and the liquid level sensor interface B is arranged on the upper end face of the pressure relief shell; the lower end of the pressure relief device is provided with a pipe body extending to the lower end of the sewage cavity, and the pipe body is communicated with the liquid level circulation pipeline.

Compared with the prior art, the invention has the advantages that:

(1) The invention is provided with the ventilation pipeline system near the sewage source and the building (such as rural flat houses, tile houses, buildings, cement houses, villas, urban residential buildings, high buildings, mansion and the like), and the ventilation pipeline system can be communicated with the equipment cavity or the gravity sewage inlet pipeline for ventilation without arranging a ventilation column near the ground of a vacuum well or arranging an open well cover; the purchase cost of the related configuration pipelines and the ground ventilation column is saved, the cost of customizing the special sealing well cover is saved, the ventilation column does not need to be configured nearby the vacuum well, traffic is more facilitated, the probability of damage to the ventilation column caused by collision is reduced, and the reliability of the equipment is further improved; meanwhile, due to the arrangement of the ventilation pipeline system, the design of the sealing well cover is adopted, the well cover is free from leakage and water leakage, the existence of the sealing well cover structure is free from formation of flood and static pressure to a certain extent, and further the use reliability and stability of the system are facilitated, and the service life is prolonged.

(2) The device cavity adopts the combination of the pneumatic controller, the vacuum sewage discharge valve and the liquid level sensor to control sewage discharge, wherein the pneumatic controller adopts an integrated structure, has compact structure, less types and quantity of parts, high reliability and flexible and convenient installation mode; the vacuum blowoff valve is mainly used for periodically discharging sewage in the vacuum well into a downstream pipeline network; the liquid level sensor is used for sensing the lifting of the water level, and is used for driving the pneumatic controller to drive the vacuum sewage valve to work when the water level reaches a high liquid level; the whole structure is reliable in design, various in installation mode and stronger in applicability.

(3) When the ventilation pipeline system is connected with the gravity sewage inlet pipeline, the lifting bent pipe is arranged on the gravity sewage inlet pipeline to generate water resistance, so that the pressure relief device is additionally arranged in the equipment cavity and is mainly used for ventilation of the vacuum blow-down valve and the pneumatic controller, pressure relief and drainage of air above the sewage cavity, and the tolerance of the water resistance on the gravity sewage inlet pipeline is improved; the pressure relief device adopts a corrugated diaphragm on-off valve type structure, and the sealing component does not need to be contacted with sewage when the device works, so that the reliability of the device, in particular the sewage resistance capability, is improved.

(4) The pressure relief device can be arranged independently, and can also adopt a structural design mode of combining with the liquid level sensor, when the pressure relief device is installed, the installation position is far away from one side of a gravity sewage inlet pipeline, and good connection with a baffle plate is required to be ensured, so that the working efficiency is improved, an interface connected with the equipment cavity is installed at the lowest point of the upper surface of the baffle plate, and the condensed water in the equipment cavity is conveniently discharged into the sewage cavity through the interface; the structure is combined into one, so that the structure is more compact, the occupied space is small, pollution discharge of filiform solid impurities is facilitated, filiform solid impurities such as hair, thread ends and the like are prevented from being intertwined among a plurality of rod pieces, and further the sewage pollution discharge efficiency and reliability are improved.

(5) The invention does not adopt power sources such as batteries, solar energy or commercial power and the like, and does not adopt an electromagnetic valve as a power driving mode, thereby improving the operation reliability of the whole vacuum well system, ensuring the equipment maintenance to be convenient and easy, and having lower use and operation cost, in particular to the aspect of energy consumption.

(6) According to the invention, the sewage cavity and the equipment cavity are separated by the partition plate, so that dry-wet separation is realized, the air between the upper cavity and the lower cavity is prevented from being directly communicated, and the environmental requirements of equipment in the equipment cavity are further ensured; meanwhile, a manual ball valve is arranged in the sewage pipeline system, so that the pipeline can be manually closed, and the applicability of the structure is improved; furthermore, the height of the pressure relief device can be adjusted during processing, and the pressure relief device is applicable to the situation that the distances from the high liquid level of the vacuum well to the limit liquid level are different due to different altitudes.

Drawings

The invention is further described below with reference to the accompanying drawings and examples:

fig. 1 is a schematic diagram of an application structure of a sewage tank ventilation type vacuum well according to embodiment 1 of the present invention;

FIG. 2 is a front view showing the structure of a ventilated vacuum well of a sewage tank according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the pneumatic controller, the vacuum sewer valve and the liquid level sensor of embodiment 1 of the present invention;

FIG. 4 is a schematic view of the pneumatic controller and the vacuum sewer valve according to the embodiment 1 of the present invention when they are vertically arranged;

FIG. 5 is a cross-sectional view showing the structure of the pneumatic controller according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of the pneumatic controller according to embodiment 1 of the present invention;

FIG. 7 is a schematic view of the pneumatic controller according to embodiment 1 of the present invention;

FIG. 8 is a schematic view showing the structure of a vacuum sewer valve according to embodiment 1 of the present invention;

fig. 9 is a structural sectional view showing a non-deformed state of a sewage diaphragm of the vacuum sewage valve according to embodiment 1 of the present invention;

fig. 10 is a structural sectional view showing a state in which a sewage diaphragm of the vacuum sewage valve described in embodiment 1 of the present invention is deformed;

FIG. 11 is a diagram showing the piping connection of the pneumatic controller, the vacuum sewer valve and the liquid level sensor of embodiment 1 of the present invention;

fig. 12 is a schematic diagram of an application structure of a ventilated vacuum well of a sewage tank according to embodiment 2 of the present invention;

Fig. 13 is a schematic structural view of a ventilated vacuum well of a sewage tank according to embodiment 2 of the present invention;

FIG. 14 is a front view showing the connection structure between the pressure relief device and the partition plate in embodiment 2 of the present invention;

fig. 15 is a cross-sectional view showing the structure of the pressure relief device according to embodiment 2 of the present invention;

Fig. 16 is a structural sectional view of the pressure release housing in embodiment 2 of the present invention;

fig. 17 is a structural sectional view of the connection base in embodiment 2 of the present invention;

fig. 18 is a schematic diagram of an application structure of a ventilated vacuum well of a sewage tank according to embodiment 3 of the present invention;

FIG. 19 is a schematic view showing the structure of a ventilated vacuum well of a sewage tank according to embodiment 3 of the present invention;

FIG. 20 is a front view showing the connection structure between the pressure relief device and the partition plate in embodiment 3 of the present invention;

FIG. 21 is a sectional view showing the structure of the pressure relief device and the liquid level sensor according to embodiment 3 of the present invention;

FIG. 22 is an enlarged view of a portion of the pressure relief device and the fluid level sensor according to embodiment 3 of the present invention;

FIG. 23 is a piping connection diagram of the pneumatic controller, the vacuum sewer valve, the liquid level sensor and the pressure relief device of embodiment 3 of the present invention;

FIG. 24 is a flow chart of the pressure relief device in example 2 and example 3 of the present invention;

FIG. 25 is a flow chart of the inside of the liquid level sensor in embodiment 3 of the present invention.

Wherein: 01. a sewage source, 02, a vacuum collection tank, 03, a vacuum pump station, 04 and a sewage treatment station;

1. A well body;

11. the sewage chamber, 12, the equipment chamber, 13, the sealing well cover, 14 and the partition plate;

2. A pneumatic controller;

201. A first cavity, 202, a second cavity, 203, a third cavity, 204, a fourth cavity, 205, a fifth cavity, 206, a sixth cavity;

211. An air inlet 212, a vacuum drain valve air interface A,213, a vacuum drain valve air control interface A,214, a liquid level sensor interface A,215, a vacuum inlet A,216, a condensed water outlet 217, a needle valve, 218, an air flow channel 219, and a filter block;

221. a first valve stem, 222, a first seal, 223, a first diaphragm;

231. a second valve stem, 232, a second seal, 233, a second diaphragm;

3. a vacuum blow-down valve;

31. A blowdown housing, 32, blowdown membrane;

311. The vacuum blowoff valve comprises a vacuum blowoff valve air interface B,312, a vacuum blowoff valve air control interface B,313, a vacuum inlet and outlet B,314, a water inlet interface, 315 and a water outlet interface;

4. A liquid level sensor;

41. A liquid level circulation pipeline 42, a liquid level sensor interface B,43 and a pipe body;

5. a sewage pipeline system;

51. A gravity sewage inlet pipeline 52, a sewage suction pipeline 53, a vacuum conveying pipeline 54, a manual ball valve 55 and a lifting elbow;

6. a ventilation line system;

61. A vent pipe;

7. a pressure relief device;

71. A pressure relief housing, 72, a vent assembly, 73, a seal assembly;

711. an upper housing 712, a lower housing 713, a cavity;

721. The vent ring, 722, the connecting seat, 723, the vent seat, 724, the vent groove, 725, the upper chamber, 726, the lower chamber, 727, the vent hole, 728, the pressure relief pipeline, 729 and the connecting port;

731. The sealing valve rod 732, the sealing membrane 733, the return spring 734, the plug 735 and the lip-shaped sealing ring.

Detailed Description

The following describes the present invention in further detail with reference to specific examples:

Example 1

As shown in fig. 1, a sewage tank ventilation type vacuum well has the following application fields:

The sewage tank ventilation type vacuum well is arranged below the ground and serves as a temporary sewage collecting and storing device, domestic sewage (such as black water represented by wastewater sources of a urinal, a closestool and the like and grey water represented by wastewater sources of a kitchen, a bath and the like) from a sewage source 01 (such as a rural flat house, a tile house, a building, a cement house, a villa, an urban residential building, a high building, a building and the like) is conveyed to a sewage treatment station 04 at a relatively far distance, and a vacuum collecting tank 02 and a vacuum pump station 03 are further arranged between the sewage tank ventilation type vacuum well and the sewage treatment station 04.

As shown in fig. 2, the sewage tank ventilation type vacuum well comprises a well body 1, a pneumatic controller 2 installed in the well body 1, a vacuum sewage discharge valve 3, a liquid level sensor 4, a sewage pipeline system 5 and a ventilation pipeline system 6 which are connected with the well body 1.

As shown in fig. 2, the well body 1 comprises a sewage cavity 11, an equipment cavity 12 and a sealing well cover 13 covered at the upper end, the sewage cavity 11 and the equipment cavity 12 are separated by a partition plate 14 arranged along the horizontal direction, the upper end and the lower end are not communicated, the sewage cavity 11 is positioned above the partition plate 14, the equipment cavity 12 is positioned below the partition plate 14, and the inside of the well body 1 is subjected to dry-wet separation by the arrangement of the partition plate 14, so that the air between the upper cavity and the lower cavity is prevented from being directly communicated, and the environmental requirements required by equipment in the equipment cavity 12 are further ensured; the sealing well cover 13 is covered above the equipment cavity 12, and adopts a sealing structure, so that the sealing well cover is airtight and watertight, and the existence of the sealing well cover is prevented from being formed by flood and static pressure to a certain extent, thereby being beneficial to the stability and reliability of the system and prolonging the service life.

As shown in fig. 2, the sewage line system 5 includes a gravity sewage inlet line 51 communicating with the sewage chamber 11, a sewage suction line 52 connected to the vacuum sewage valve 3, and a vacuum delivery line 53.

As shown in fig. 2, the ventilation pipe system 6 includes a ventilation pipe 61 extending to the upper end of the ground, the lower end of the ventilation pipe 61 is communicated with the equipment cavity 12, the part extending to the upper end of the ground is set by wall-attaching (rural peripheral yard walls, house external walls, etc.) or by installing the ventilation pipe system in the wall, and when the ventilation pipe system is set by wall-attaching, the upper end of the ventilation pipe system is required to be bent downwards, so that rainwater is prevented from entering.

In this embodiment, the pneumatic controller 2, the vacuum sewer valve 3 and the liquid level sensor 4 are all installed in the equipment cavity 12, and can be connected in the following two ways: first, as shown in fig. 3, the pneumatic controller 2, the vacuum drain valve 3 and the liquid level sensor 4 are arranged in parallel along the horizontal direction, and the pneumatic controller 2 and the liquid level sensor 4 are respectively arranged at two sides of the vacuum drain valve 3 and are fixedly connected through anchor clamps; secondly, as shown in fig. 4, the pneumatic controller 2 and the vacuum drain valve 3 are arranged up and down along the vertical direction, and the liquid level sensor 4 is arranged at the side edge of the vacuum drain valve 3 and is fixedly connected with the vacuum drain valve 3 through a hoop; in the field installation process, the specific connection mode can be reasonably selected according to the installation environment and space.

The specific structure and working principle of the pneumatic controller 2, the vacuum drain valve 3 and the liquid level sensor 4 are as follows:

As shown in fig. 5 and 6, the air-operated controller 2 includes an air-operated housing 21, an actuator 22 and a control mechanism 23 provided inside the air-operated housing 21; as shown in fig. 7, the side wall of the pneumatic control shell 21 is provided with an air inlet 211, a vacuum drain valve air interface A212 and a vacuum drain valve pneumatic control interface A213, the bottom is provided with a liquid level sensor interface A214, a vacuum inlet A215 and a condensate outlet 216, and as shown in fig. 6, an air flow passage 218 communicated with the air inlet 211 and the vacuum drain valve air interface A212 is arranged inside; the actuator 22 is used for intermittently communicating the pneumatic interface of the vacuum sewage valve 3 with the air inlet 211 and the vacuum inlet and outlet, and structurally comprises a first valve rod 221, a first sealing piece 222 and a first diaphragm 223; the control mechanism 23 is connected with the interface of the liquid level sensor 4 and is used for driving the actuating mechanism 22 to work, and the structure of the control mechanism comprises a second valve rod 231, a second sealing piece 232 and a second diaphragm 233; by the arrangement of the first diaphragm 223 and the second diaphragm 233, the interior of the housing is divided into a first cavity 201, a second cavity 202, a third cavity 203, a fourth cavity 204, a fifth cavity 205 and a sixth cavity 206 from top to bottom, wherein the first diaphragm 223 is arranged between the third cavity 203 and the fourth cavity 204, and the second diaphragm 233 is arranged between the fifth cavity 205 and the sixth cavity 206.

The communication mode inside the pneumatic controller 2 is as follows: the middle parts of the first cavity 201, the second cavity 202 and the third cavity 203 are communicated, the third cavity 203 and the fourth cavity 204 are communicated through a needle valve 217 with adjustable flow, the fourth cavity 204 is communicated with the middle part of the fifth cavity 205, an air flow channel 218 is communicated with an air inlet 211 and an air interface of the vacuum drainage valve 3 (the air flow channel 218 is communicated with the outer side end), the air flow channel 218 is communicated with the first cavity 201 and the fifth cavity 205 (the air flow channel 218 is communicated with the inner side end), a vacuum drainage valve pneumatic control interface A213 is communicated with the second cavity 202, a vacuum inlet A215 is communicated with the third cavity 203, and a liquid level sensor interface A214 is communicated with the sixth cavity 206.

The first valve rod 221 realizes movement through the deformation of the first diaphragm 223, and the first sealing piece 222 connected with the first valve rod 221 is used for intermittently realizing the communication between the upper end and the lower end of the second cavity 202 through the up-down movement, namely, intermittently realizing the communication between the air inlet 211 and the vacuum inlet through the pneumatic control interface of the vacuum sewage discharging valve 3; the second valve stem 231 is moved by deformation of the second diaphragm 233, and the second seal 232 coupled to the second valve stem 231 is used to intermittently communicate the fourth cavity 204 with the fifth cavity 205.

The specific working principle of the pneumatic controller 2 is as follows: as shown in fig. 6, when the liquid level sensor interface a214 is in a high pressure state, the upper and lower ends of the second diaphragm 233 move upward due to different pressures, and the second valve rod 231 drives the second sealing member 232 to move upward, at this time, the fourth cavity 204 is communicated with the fifth cavity 205, because the fifth cavity 205 is communicated with the air flow channel 218, air is introduced into the fourth cavity 204, and the third cavity 203 is communicated with the vacuum inlet and outlet, and the interior is vacuum, so the first diaphragm 223 moves upward due to different pressures at the upper and lower ends, and drives the first sealing member 222 to move upward through the first valve rod 221, at this time, the second cavity 202 is communicated with the third cavity 203, at this time, the vacuum drain valve air control interface a213 is communicated with the vacuum inlet and outlet, and the vacuum drain valve air control interface a213 is introduced with vacuum; conversely, the air control interface A213 of the vacuum drain valve is communicated with the air flow channel 218 (namely the air inlet 211), and air is introduced into the air control interface A213 of the vacuum drain valve.

In this embodiment, during the process of introducing air into the air flow channel 218 through the air inlet 211, the air is further subjected to a filter block 219 to remove dust and filter the air, remove impurities in the air, intercept condensed water vapor in the air, and finally drain the condensed water from the condensed water outlet 216; the design of the filtering structure can prevent impurities and condensed water from entering the pneumatic controller 2 and adhering to the executing mechanism 22 and the control mechanism 23, so that the problem of failure of the internal structure is avoided; the vacuum inlet and outlet A215 is arranged below the pneumatic control shell 21, and a vacuum source three-stage pressure stabilizing system is arranged between the vacuum inlet and outlet A215 and the communicated third cavity 203, so that the influence of pressure fluctuation on the operation of the actuating mechanism 22 and the control mechanism 23 is prevented, and the reliability and stability of pressure stabilization are improved.

As shown in fig. 8, 9 and 10, the vacuum drain valve 3 includes a drain housing 31 and a drain diaphragm 32 disposed inside the drain housing 31; two ends of the sewage shell 31 are provided with a water inlet interface 314 and a water outlet interface 315 which are communicated with the inside of the sewage shell 31, the side wall is provided with a vacuum sewage valve air interface B311, the upper end is provided with a vacuum sewage valve pneumatic control interface B312, and the side wall of the water outlet interface 315 is provided with a vacuum inlet and outlet B313; meanwhile, a sewage suction pipeline 52 is connected with a water inlet connector 314, the lower end of the sewage suction pipeline extends into the sewage cavity 11, a vacuum conveying pipeline 53 is connected with a water outlet connector 315, and a manual ball valve 54 is arranged at the end part of the vacuum conveying pipeline; the sewage discharging membrane 32 is arranged inside the shell, and the opening and closing of the water inlet interface 314 and the water outlet interface 315 are realized through different deformation states.

The working principle of the vacuum blow-down valve 3 is as follows: because the vacuum blowdown valve 3 needs to be connected with the downstream vacuum pump station 03, the space below the blowdown diaphragm 32 is in a vacuum state, when the vacuum is introduced into the vacuum blowdown valve air interface B311, the pressures at the upper end and the lower end of the blowdown diaphragm 32 are the same, as shown in FIG. 9, the blowdown diaphragm 32 can be restored to a non-deformation state, the water inlet interface 314 is communicated with the water outlet interface 315, and the vacuum blowdown valve 3 is opened; when air is introduced into the air interface B311 of the vacuum blow-down valve, the pressure at the upper end of the blow-down membrane 32 is greater than the pressure at the lower end, as shown in FIG. 10, at this time, the blow-down membrane 32 will deform, the lower end of the blow-down membrane 32 abuts against the lower end of the inner part of the blow-down shell 31, so that the water inlet interface 314 is not communicated with the water outlet interface 315, and the vacuum blow-down valve 3 is closed.

Third, as shown in fig. 11, the liquid level sensor 4 includes a liquid level circulation pipeline 41 and a liquid level sensor interface B42 disposed at an upper end of the liquid level circulation pipeline 41, the liquid level circulation pipeline 41 extends into the sewage chamber 11, and the liquid level sensor interface B42 is located in the equipment chamber 12.

The working principle of the liquid level sensor 4 is as follows: since the liquid level circulation pipeline 41 is positioned in the sewage cavity 11, when the liquid level in the sewage cavity 11 rises, the liquid level in the liquid level circulation pipeline 41 also gradually rises, and meanwhile, the internal gas pressure gradually increases, and conversely, the pressure is reduced, so that the device connected with the device is triggered to work.

The pipeline connection relation of the pneumatic controller 2, the vacuum drain valve 3 and the liquid level sensor 4 is as follows:

As shown in fig. 11 (in fig. 11, the liquid level sensor 4 has been separated for the convenience of observing the connection relationship of the pipes), the vacuum drain valve air port a212 and the vacuum drain valve air port B311, the vacuum drain valve air port a213 and the vacuum drain valve air port B312, the vacuum inlet and outlet a215 and the vacuum inlet and outlet B313, the liquid level sensor port a214 and the liquid level sensor port B42 are sequentially connected through the pipes.

In general, the working principle of the present embodiment is:

(1) When the liquid level in the sewage chamber 11 rises, referring to the above-mentioned "working principle of the liquid level sensor 4", when the liquid level in the liquid level circulation pipeline 41 also rises gradually, the internal gas pressure will increase gradually, the pressure at the liquid level sensor interface B42 rises, and the pressure at the liquid level sensor interface a214 connected thereto also rises;

(2) When the liquid level sensor interface a214 is in a high-pressure state, referring to the specific working principle of the pneumatic controller 2, as shown in fig. 6, at this time, the first sealing member 222 and the second sealing member 232 both move upwards in the illustrated state, the vacuum drain valve pneumatic control interface a213 is communicated with the vacuum inlet and outlet, vacuum is introduced into the vacuum drain valve pneumatic control interface a213, and vacuum is introduced into the vacuum drain valve pneumatic control interface B312 connected with the vacuum drain valve pneumatic control interface a 213;

(3) When vacuum is introduced into the air interface B311 of the vacuum blow-down valve, referring to the working principle of the vacuum blow-down valve 3, the pressures at the upper end and the lower end of the blow-down membrane 32 are the same, as shown in fig. 9, the blow-down membrane 32 is restored to a non-deformed state, the water inlet interface 314 is communicated with the water outlet interface 315, and the vacuum blow-down valve 3 is opened, so that the sewage in the sewage cavity 11 is discharged.

Example 2

As shown in fig. 12, in a sewage tank ventilation type vacuum well, the application scenario is the same as that of embodiment 1, in this embodiment, the gravity sewage inlet pipeline 51 is laid in a gravity manner according to the gradient of gravity drop from the sewage source to the vacuum well, if the distance is too large, a necessary number of lifting elbows 55 need to be added therebetween, when the lifting elbows 55 exist, the sewage accumulated at the lifting elbows 55 will cause that the air in the ground ventilating pipe 61 near the building cannot effectively enter the sewage cavity 11, and then a water resistance problem will occur.

The water resistance has the following specific effects:

Firstly, the sewage cavity 11 and the equipment cavity 12 are configured in a sealing mode, so that air above the sewage cavity 11 is in a sealing state; when the ground air cannot be effectively and smoothly communicated with the air above the sewage cavity 11, the pressure of the air above the sewage liquid level in the sewage cavity 11 is lower than the atmospheric pressure, so that misoperation of the liquid level sensor 4 can be caused, and finally, the function of the pneumatic controller 2 is disabled.

Secondly, after sewage from a sewage source enters the sewage cavity 11, the sewage level in the sewage cavity 11 gradually rises from a low water level to a high water level, when the water level continues to rise, the pressure of air on the liquid level of the sewage tank is far greater than the atmospheric pressure, the pressure value of the air is far greater than the action pressure value of the high water level in the liquid level sensor 4, and then the first diaphragm 223 and the second diaphragm 233 in the pneumatic controller 2 are damaged due to the overlarge pressure, so that the effective action of the vacuum sewage discharge valve 3 is affected; more seriously, in order to improve the use range of the vacuum well and the angle requirement of the lifting bend pipe 55 in most cases, especially in the case of different installation heights, such as hillsides, the distance between the high water level point of the liquid level sensor 4 and the partition plate 14 can be different according to the distance between the bottom of the sewage cavity 11 and the partition plate 14, so that the absolute water level of the high water level in the sewage cavity 11 is different at different elevation positions, in the extreme case, some vacuum wells have large flow rate and high flow velocity due to gravity flow at low elevation positions, and thus the necessary pressure impact is caused on sewage in the vacuum well, and in the extreme case, especially when the liquid level in the sewage cavity 11 reaches the limit liquid level, the sewage can enter the pneumatic controller 2 through the liquid level sensor 4.

Thirdly, in order to avoid touching sewage, the triggering liquid level in the equipment needs to be accurately adjusted, verified and determined in the actual installation process, but the fixed scheme or the technical scheme of adding a mounting bracket in the prior art cannot be reliably and effectively adjusted, and particularly when the liquid level in the sewage cavity 11 gradually drops, high-pressure air in the equipment cavity 12 is returned into the sewage cavity 11.

In this embodiment, therefore, the vent pipe 61 is connected to the gravity sewage inlet pipe 51, so that the pressure relief device 7 is added to the equipment chamber 12 as compared with the embodiment 1, as shown in fig. 13.

As shown in fig. 14, the pressure relief device 7 is mounted on the partition 14, and as shown in fig. 15, the structure thereof includes a pressure relief housing 71, a ventilation assembly 72 and a sealing assembly 73 which are disposed in the pressure relief housing 71; the pressure release shell 71 is mounted on the partition 14 and comprises an upper shell 711 and a lower shell 712 which are in clamping fit, wherein the upper shell 711 is mounted above the partition 14, and the lower shell 712 is mounted below the partition 14; the upper housing 711 and the lower housing 712 have a cavity 713 therein, the upper end of the cavity 713 is open, and the lower end extends into the sewage chamber 11 and communicates with the sewage chamber 11 through the side wall of the lower housing 712; the ventilation assembly 72 comprises a ventilation ring 721 attached to the inner wall of the cavity 713, a connecting seat 722 nested in the ventilation ring 721 and a ventilation seat 723 nested at the upper end part of the connecting seat 722; as shown in fig. 16, a plurality of ventilation grooves 724 are uniformly distributed on the side wall of the ventilation ring 721 along the central axis direction of the pressure relief shell 71; the connecting seat 722 is internally provided with an upper chamber 725 and a lower chamber 726, as shown in fig. 17, a plurality of vent holes 727 communicated with the vent grooves 724 are uniformly distributed on the side wall of the connecting seat 722 corresponding to the upper chamber 725; the ventilation seat 723 is nested in the upper cavity 725, a pressure relief pipeline 728 communicated with a ventilation hole 727 is arranged in the middle of the ventilation seat, a connecting port 729 communicated with the pressure relief pipeline 728 is arranged at the upper end of the ventilation seat, as shown in fig. 13, one end of the connecting port 729 is communicated with an air inlet 211 at the side of the pneumatic controller 2, and the other end of the connecting port is communicated with the equipment cavity 12; as shown in fig. 15, the sealing assembly 73 is nested in the lower chamber 726, and includes a sealing valve rod 731, a sealing membrane 732 and a return spring 733, where the sealing valve rod 731 is located below the pressure relief pipeline 728 and coaxially disposed with the pressure relief pipeline 728, a plug 734 is disposed at the upper end, and a lip seal ring 735 forming a seal with the plug 734 is disposed at the lower end of the pressure relief pipeline 728.

As a further optimization of this embodiment, the pressure relief device 7 is installed on the side of the partition 14 away from the gravity sewage inlet pipe 51, and the partition 14 needs to be sealed well during installation.

In this embodiment, the seal assembly 73 is normally acted by the return spring 733, the plug 734 is separated from the lip seal ring 735, and at this time, the cavity 713, the ventilation groove 724, the ventilation hole 727, the pressure relief pipeline 728 and the connection port 729 are communicated for realizing ventilation of air; when the pressure below the cavity 713 is increased by the rise of the water level (when the sewage enters from below the cavity 713), the sealing diaphragm 732 drives the sealing valve rod 731 to move upwards, so that the plug 734 and the lip-shaped sealing ring 735 form a seal, thereby closing the communication channel and preventing the sewage from entering the equipment cavity 12 and the pneumatic controller 2; the design of the structure ensures that the sealing component 73, particularly the plug 734 and the lip-shaped sealing ring 735, cannot be contacted with sewage to cause sealing failure, further avoids the problem that sewage enters the pneumatic controller 2, and ensures that the reliability of the device is higher and the service life is long; meanwhile, for a vacuum well with large liquid level fluctuation, for example, in a situation where the absolute height of the sewage chamber 11 is large, the height stroke of the chamber (i.e., the lower chamber 726) where the sealing assembly 73 is located needs to be increased, so that pollution of the sealing assembly 73 caused by the fluctuation of sewage is effectively avoided.

Example 3

As shown in fig. 18, the application scenario of the sewage tank ventilation type vacuum well is the same as that of embodiment 1 and embodiment 2, in this embodiment, as shown in fig. 19 and 20, the liquid level sensor 4 and the pressure relief device 7 in embodiment 2 are integrally designed, the pressure relief device 7 is mounted on the partition 14, as shown in fig. 21 and 22, the structure of the sewage tank ventilation type vacuum well comprises a pressure relief shell 71, a ventilation component 72 and a sealing component 73 which are arranged in the pressure relief shell 71, and a pipe body 43 extending to the lower end of the sewage cavity 11 is arranged at the lower end of the pressure relief shell 71; the liquid level sensor 4 comprises a liquid level circulation pipeline 41 and a liquid level sensor interface B42, wherein the liquid level circulation pipeline 41 penetrates through the pressure relief shell 71, the liquid level sensor interface B42 is communicated with the upper end of the liquid level circulation pipeline 41 and is arranged on the upper end face of the pressure relief shell 71, and the lower end of the liquid level circulation pipeline 41 is communicated with the pipe body 43.

In this embodiment, the pipeline connection relationship among the pneumatic controller 2, the vacuum sewer valve 3 and the pressure relief device 7 is as follows:

as shown in fig. 23, in order to facilitate the illustration of the clear connection relationship, the inside of the oval dashed line in the figure is a schematic diagram of the bottom structure of the pneumatic controller 2, and one end of the vacuum drain valve air interface a212 and the vacuum drain valve air interface B311, the vacuum drain valve air control interface a213 and the vacuum drain valve air control interface B312, the vacuum inlet and outlet a215 and the vacuum inlet and outlet B313, the liquid level sensor interface a214 and the liquid level sensor interface B42, and the connection port 729 are sequentially connected with the air inlet 211 through pipelines.

In combination with embodiment 2 and embodiment 3, the working principle of the pressure relief device 7 is specifically as follows:

(1) As shown in fig. 24, when the liquid level in the sewage chamber 11 continues to rise from the low liquid level until reaching the high liquid level, the air above the sewage chamber 11 is sequentially ventilated to the air inlet 211 of the air controller 2 through the cavity 713, the ventilation groove 724, the ventilation hole 727, the decompression pipeline 728, and the connection port 729; when the liquid level in the sewage chamber 11 continues to drop from the high liquid level, the air at the air inlet 211 is ventilated to the upper part of the sewage chamber 11 through the connecting port 729, the pressure relief pipeline 728, the ventilation hole 727, the ventilation groove 724 and the cavity 713 in sequence, namely, the air is shown by a dotted line in fig. 24;

(2) When the sewage in the sewage cavity 11 exceeds the high liquid level, the liquid level still continues to rise, and during the period, the air above the sewage cavity 11 continues to be ventilated through the cavity 713, the ventilation groove 724, the ventilation hole 727, the decompression pipeline 728 and the connection port 729 (on the air inlet 211 side); meanwhile, when the liquid level exceeds the high liquid level, the air pressure above the sewage cavity 11 is too high, so that the pneumatic controller 2 can be misoperation, and the higher pressure can convey gas into the equipment cavity 12 through the cavity 713, the ventilation groove 724, the ventilation hole 727, the pressure relief pipeline 728 and the connecting port 729 (on one side of the equipment cavity 12), so that the influence of the ultrahigh pressure gas on the pneumatic controller 2 is further reduced;

(3) When the sewage in the sewage chamber 11 reaches the upper wall of the sewage chamber 11 (i.e. the sewage fills the whole sewage chamber 11), the sewage can enter the cavity 713 inside the pressure release shell 71, and air in the cavity 713 is compressed, so that the sealing diaphragm 732 is pushed to drive the sealing valve rod 731 to move upwards, and finally the plug 734 and the lip-shaped sealing ring 735 form sealing, so that a circulation path shown by a dotted line in fig. 24 is closed, and the sewage is effectively prevented from entering the equipment chamber 12 and the pneumatic controller 2.

In embodiment 3, the liquid level controller operates according to the following principle:

As shown in fig. 24 and 25, the dashed line in the drawing is an air flow path diagram in the liquid level sensor 4, and when the sewage level in the sewage chamber 11 is continuously increased, the liquid level in the pipe body 43 is continuously increased, so that the air pressure at the upper end of the liquid level in the pipe body 43 is increased, and the air pressure in the liquid level circulation pipeline 41 and at the liquid level sensor interface B42 is increased; when the sewage liquid level in the sewage cavity 11 continuously drops, the liquid level in the pipe body 43 starts to drop, so that the air pressure at the upper end of the liquid level in the pipe body 43 drops, and the air pressure in the liquid level circulation pipeline 41 and at the liquid level sensor interface B42 drops; the operation of the pneumatic controller 2 and thus the vacuum sewer valve 3 can be triggered by pressure feedback at the level sensor interface B42.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same according to the content of the present invention, and are not intended to limit the scope of the present invention. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and thus, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. A sewage tank ventilation formula vacuum well, its characterized in that: the device comprises a well body, a pneumatic controller, a vacuum blow-off valve, a liquid level sensor, a sewage pipeline system and a ventilation pipeline system, wherein the pneumatic controller, the vacuum blow-off valve and the liquid level sensor are arranged in the well body; the well body comprises a sewage cavity, an equipment cavity and a sealing well cover which is covered at the upper end; the pneumatic controller, the vacuum blow-off valve and the liquid level sensor are all arranged in the equipment cavity; the sewage pipeline system comprises a gravity sewage inlet pipeline communicated with the sewage cavity, a sewage suction pipeline connected with the vacuum sewage discharging valve and a vacuum conveying pipeline; the ventilation pipe system comprises a ventilation pipe extending to the upper end of the ground;

the pneumatic controller comprises a pneumatic control shell, an executing mechanism and a control mechanism, wherein the executing mechanism and the control mechanism are arranged in the pneumatic control shell; the side wall of the pneumatic control shell is provided with an air inlet, a vacuum blowoff valve air interface A and a vacuum blowoff valve pneumatic control interface A, and the bottom of the pneumatic control shell is provided with a liquid level sensor interface A, a vacuum inlet and outlet A and a condensate water outlet; the actuating mechanism is used for intermittently communicating the pneumatic control interface of the vacuum sewage valve with the air inlet and the vacuum inlet and outlet, and structurally comprises a first valve rod, a first sealing piece and a first diaphragm; the control mechanism is connected with the liquid level sensor interface and used for driving the actuating mechanism to work, and the structure of the control mechanism comprises a second valve rod, a second sealing piece and a second diaphragm;

The vacuum sewage valve comprises a sewage shell and a sewage membrane arranged in the sewage shell; the two ends of the sewage draining shell are provided with a water inlet interface and a water outlet interface which are communicated with the inside of the sewage draining shell, the side wall is provided with a vacuum sewage draining valve air interface B, the upper end is provided with a vacuum sewage draining valve air control interface B, the water inlet port is communicated with the sewage suction pipeline, the water outlet port is communicated with the vacuum conveying pipeline and is provided with a manual ball valve, and a vacuum inlet and outlet B is arranged on the side wall of the water outlet port;

The liquid level sensor comprises a liquid level circulation pipeline and a liquid level sensor interface B arranged at the end part of the upper end of the liquid level circulation pipeline, and the liquid level circulation pipeline extends into the sewage cavity;

The vacuum drain valve air interface A is communicated with the vacuum drain valve air interface B, the vacuum drain valve air control interface A is communicated with the vacuum drain valve air control interface B, the vacuum inlet and outlet A and the vacuum inlet and outlet B, the liquid level sensor interface A and the liquid level sensor interface B are communicated through pipelines in sequence;

the upper end of the vent pipe is extended to the ground, the part extending to the ground is arranged in a wall-sticking or wall-mounting mode, and a lifting bent pipe is arranged on the gravity sewage inlet pipeline between the lower end part and the well body;

The pressure relief device is arranged in the equipment cavity and is arranged on one side, far away from the gravity sewage inlet pipeline, of the well body, and the pressure relief device structurally comprises a pressure relief shell, a ventilation assembly and a sealing assembly, wherein the ventilation assembly and the sealing assembly are arranged in the pressure relief shell; the pressure release shell is internally provided with a cavity, and the lower end of the pressure release shell extends into the sewage cavity and is communicated with the sewage cavity; the ventilation assembly comprises a ventilation ring, a connecting seat and a ventilation seat, wherein the ventilation ring is attached to the inner wall of the cavity, the connecting seat is arranged in the ventilation ring in a nested manner, and the ventilation seat is arranged at the upper end part of the connecting seat in a nested manner; the middle part of the ventilation seat is provided with a pressure relief pipeline which is communicated with the sewage cavity by using a ventilation ring and a connecting seat, and the upper end of the ventilation seat is provided with a connecting port which is communicated with the pressure relief pipeline; the sealing assembly is nested at the lower end part of the connecting seat and comprises a sealing valve rod, a sealing diaphragm and a return spring, wherein the sealing valve rod is positioned below the pressure relief pipeline and is coaxially arranged with the pressure relief pipeline;

A plurality of ventilation grooves are uniformly distributed on the side wall of the ventilation ring and are arranged along the central axis direction of the pressure relief shell; an upper cavity and a lower cavity are arranged in the connecting seat, and a plurality of vent holes communicated with the vent grooves are uniformly distributed on the side wall of the connecting seat corresponding to the upper cavity; the ventilation seat is nested in the upper cavity, the pressure relief pipeline in the middle is communicated with the ventilation hole, and the sealing component is nested in the lower cavity;

The upper end of the sealing valve rod is provided with a plug, and the lower end of the pressure relief pipeline is provided with a lip-shaped sealing ring which forms sealing with the plug.

2. A ventilated vacuum well for a sewage tank according to claim 1, wherein: the vacuum blowoff valve is fixedly connected with the pneumatic controller through the anchor ear, and the fixing mode adopts one of up-and-down connection or parallel arrangement in the horizontal direction.

3. A ventilated vacuum well for a sewage tank according to claim 2, wherein: the breather pipe is communicated with the equipment cavity, the upper end of the breather pipe extends to the place above the ground, and the part extending to the place above the ground is arranged in a wall pasting or wall mounting mode.

4. A ventilated vacuum well for a sewage tank according to claim 3, wherein: the pressure relief device and the liquid level sensor adopt split structural design, the liquid level sensor is fixedly connected with the vacuum blowoff valve through the anchor ear, the pressure relief device is installed in the equipment cavity, one end of the connecting port is communicated with an air inlet on the side of the pneumatic controller, and the other end of the connecting port is communicated with the equipment cavity.

5. A ventilated vacuum well for a sewage tank according to claim 3, wherein: the pressure relief device and the liquid level sensor adopt a combined structure design, the liquid level sensor comprises a liquid level circulation pipeline and a liquid level sensor interface B, the liquid level circulation pipeline penetrates through the pressure relief shell, and the liquid level sensor interface B is arranged on the upper end face of the pressure relief shell; the lower end of the pressure relief device is provided with a pipe body extending to the lower end of the sewage cavity, and the pipe body is communicated with the liquid level circulation pipeline.