135 results about "Flap valve" patented technology

Belonging to the field of marine resource exploration equipment, the invention relates to a portable pressure maintaining gravity sampler, which comprises an extraction hole, an empennage, a counterweight, a connecting piece, a control piece, a large spring, a control mechanism shell, a positioning block, a release pipe, a small spring, a spacer pin, a sliding pipe, a pressure maintaining pipe, a closed ring, a mandrel, a flap valve, a check valve ball, a sampling pipe, a one-way flap, a tool bit, a drain hole, a limiter and a pipe body. According to the design scheme, the sampler is provided, through the design of the control mechanism shell, the pressure maintaining pipe and the sampling pipe, a light-weight pressure maintaining structure is provided, and complex pressure compensation or a hydraulic system is not needed; in addition, a sealing and pressure maintaining device is optimized, the in-situ pressure of the seabed sediment can be stably maintained so as to guarantee the integrity of the sample, meanwhile, the operation process of the sampling process is simplified, the manufacturing cost and the fault risk are reduced, and the dual requirements of marine geological research, mineral resource exploration and other scenes for high-quality samples and efficient operation are met.

A flush valve assembly for a siphonic flush toilet, comprising a flush valve body and a flapper cover, wherein the flush valve body is coupled to an overflow tube or is coupled to an overflow tube coupling configured to receive an overflow tube, the flapper cover is configured to rotatably lift off the flush valve inlet at an open angle in a direction towards the overflow tube or the overflow tube coupling, and at least one of the flapper cover top face, the overflow tube, and the overflow tube coupling comprises a stop component configured to determine the flapper cover open angle during a flush cycle.

Seat assemblies and subassemblies thereof. The subassemblies include bladder assemblies, compression-resistant support structures, cushion assemblies, and / or heat transfer systems. The bladder assemblies may include integrated fluid conduits and / or flap valve assemblies disposed therein. The bladder assemblies may be disposed in the cushion assemblies. The cushion assemblies may be foamless such as comprising a polymeric non-woven filament mesh body. The mesh body may define one or more cavities to receive the bladder assembly. The heat transfer systems may cooperate with the bladder and / or cushion systems to heat or cool a trim surface.

The invention provides a dust removal cover, and relates to the technical field of scrap steel cutting dust removal. According to the dust removal cover, first limiting switches at SQ2-SQ7 positions are sequentially matched with first collision rods, so that an automatic walking assembly can be sequentially and accurately stopped in three corresponding fixed-point cutting areas; meanwhile, when the suction hood stops at the position, a second collision rod can just enable a heavy hammer rod of the heavy hammer flap valve to move to the highest position so as to automatically open a valve plate, and then the suction hood is communicated with the public flue to be matched with an induced draft fan and a dust remover, so that flame cutting and efficient dust removal can be performed on a local area of a scrap steel stacking and cutting area; in addition, two first limiting switches at the positions of SQ1 and SQ8 can be matched with a first sinker bar to limit the extreme movement positions of the two sides of the suction cover, the triggering directions of the first limiting switches at the positions of SQ1, SQ2, SQ4 and SQ6 are opposite to the triggering directions of the first limiting switches at the positions of SQ3, SQ5, SQ7 and SQ8, and then the suction cover does reciprocating motion to return to the stop position again for steel slag discharging.

The utility model relates to metallurgical waste heat boiler technical field and disclose a kind of high-temperature ash slag removal and temporary storage device suitable for metallurgical waste heat boiler, it include: ash chute, the ash chute includes hopper body, several access doors and several spring supports, the access door is set in hopper body side wall;Floor ash bin, including ash bin body, steel flue interface and sealing door, the steel flue interface is set at the top of sealing door, the hopper body is connected with ash bin body by just flue interface, the sealing door is set in the side wall of ash bin body;Control assembly, it is jointly arranged in the inside of ash chute and floor ash bin.This scheme uses ash chute to collect high-temperature ash slag, enters floor ash bin by high-power electric hoist driving double flap valve control ash slag, realizes closed discharge, is linked and is controlled by flap valve and sealing door, effectively isolates high-temperature area before dust removal, guarantees operator and equipment safety, improves operating stability and environmental protection.

The utility model provides cement kiln tail high-temperature low-dust SCR (Selective Catalytic Reduction) denitration equipment capable of realizing off-line ash removal, which comprises a high-temperature bag dust collector, a denitration reactor, a flue, more than two compartments, a flap valve assembly and an ash removal assembly for carrying out ash removal treatment on a filter bag to be cleaned of the high-temperature bag dust collector, all the compartments are arranged at the top of the high-temperature bag dust collector, the denitration reactor is arranged beside the high-temperature bag dust collector, the flue is located between the compartments on the two sides, and the flue is communicated with an air inlet of the denitration reactor; the air inlets of the sub-chambers are communicated with the corresponding high-temperature bag dust collectors, and the flap valve assemblies are located at the air outlets of the sub-chambers and used for communicating or blocking the air outlets of the sub-chambers with the flue; the flap valve assemblies are closed, the air outlets of the sub-chambers are blocked from the flue, the sub-chambers are unloaded, and smoke does not circulate in the sub-chambers, so that off-line ash removal of the high-temperature bag dust collector is achieved, and the single-chamber ash removal effect is more thorough.

The utility model relates to the field of batching devices, in particular to a batching device for producing an ecological water-soluble fertilizer. According to the technical scheme, a batching box is arranged between stand columns, a rotating turning plate is arranged at the upper end of the batching box, a funnel-shaped discharging pipe is arranged at the lower end of the batching box, a wedge-shaped head turning plate valve is arranged on the funnel-shaped discharging pipe, a fixed sliding rail is arranged at the rear end of the wedge-shaped head turning plate valve, and a movable sliding block is connected to the fixed sliding rail in a sliding mode; a connecting block is arranged at the upper end of the movable sliding block, a timer is arranged at the rear end of the connecting block, a push rod is arranged at the front end of the connecting block, and a rotating motor is arranged at the front end of the push rod. The push rod is arranged to stretch out and draw back, the wedge-shaped block is in wedge-shaped connection with the wedge-shaped head flap valve, the rotating motor is started to drive the rotating shaft and the wedge-shaped block to rotate, so that the wedge-shaped head flap valve is driven to rotate, ingredients in the ingredient box are discharged through the funnel-shaped discharging pipe, and the timer is used for timing; and quantitative control is realized.

A mixing device for safety production of vitamin C products relates to the technical field of stirring devices and comprises a mixing tank, an inlet pipe communicated with an inner cavity of the mixing tank is rotatably arranged at the top of the mixing tank, a feeding cylinder is rotatably inserted into the upper end of the inlet pipe, and a flap valve is rotatably arranged in the feeding cylinder; the lower end of the inlet pipe is fixedly connected with a base plate, a supporting ring is coaxially arranged below the base plate, a plurality of material distributing rods are fixedly connected between the outer wall of the base plate and the upper surface of the supporting ring in a surrounding mode, a material falling channel is formed through the area between the adjacent material distributing rods, and the width of the material falling channel is gradually increased from the center to the outer side. According to the utility model, the problems in the prior art that in the mixing process of lutein ester and vitamin C, under the action of a stirring structure, powder is easy to raise and diffuse in the surrounding environment, so that the surrounding environment is influenced, and potential safety hazards are caused to operators in the working environment are solved.

The invention provides a multifunctional stoplog gate and belongs to the technical field of hydraulic engineering stoplog gates, the multifunctional stoplog gate comprises a basic gate section, a trash holding section, a gate flap valve section and a pump and gate integrated section, and the basic gate section is composed of a gate leaf structure frame, a panel, side wheels, a reverse sliding block, a lifting hook, a positioning insertion rod and a positioning sleeve. Through reasonable configuration of different combination modes of the basic gate section, the trash holding section, the gate flap valve section and the pump and gate integrated section, different working environments can be adapted, and the combination modes and the number of the sections can be flexibly adjusted according to specific requirements of different working environments; according to the multifunctional stoplog gate, rapid switching and integration of multiple functions such as trash holding, water retaining, pump station water discharging and pump and gate integration are achieved, so that the construction cost and the later-stage transformation and maintenance cost of water conservancy projects can be remarkably reduced, and the adaptability and flexibility of the projects to cope with complex hydrological conditions and functional requirement changes are improved; powerful support is provided for efficient, economical and stable operation of various water conservancy facilities.

The utility model discloses a detachable drainer for a water conveying channel. The detachable drainer comprises a fixed outer cylinder, a partition plate, a filter cylinder and a water conveying inner cylinder, the fixed outer cylinder penetrates through a lining plate at the bottom of the channel slope, the first end of the fixed outer cylinder is located in the water conveyance channel, and the second end is inserted into the channel slope; the partition plate is located in the fixed outer barrel to divide a barrel cavity of the fixed outer barrel into a filtering cavity and a water conveying barrel mounting cavity, and an assembly hole is formed in the center of the partition plate; the filter cartridge is slidably arranged in the assembly hole in a penetrating manner, one end of the filter cartridge is closed and arranged in the filter cavity, the other end of the filter cartridge is arranged in the water delivery cylinder mounting cavity and extends outwards in the radial direction to form an annular limiting plate, and a water through hole is formed in the filter cartridge; the first end of the water conveying inner barrel is detachably connected to the partition plate, the annular limiting plate is pressed on the partition plate through a pressing piece, and a non-return flap valve is detachably installed at the second end of the water conveying inner barrel. The detachable drainer for the water conveyance canal is easy to detach, and silt in the drainer can be cleaned or parts in the drainer can be replaced.

The invention relates to a pipeline floating object processing device based on image recognition. The pipeline floating object processing device comprises an inlet short section, a bin body, a visual module, a glass sleeve, an annular seal, an annular air knife, a floating object processing mechanism, a reducing short section and an access door. The inlet nipple is connected with the near end of a suction inlet of a negative pressure pipeline of the winnowing equipment, a light source module is arranged in the bin body, the glass sleeve penetrates through the bin body and serves as a communicating pipe, and the annular air knife corresponds to the glass sleeve. The visual module is installed on the outer side of the bin body and arranged opposite to the glass sleeve so as to collect images of the light objects in the pipeline, and the light object processing mechanism is connected with the bin body through a reducing nipple. The floating object processing mechanism comprises a pneumatic flap valve, a sieve plate, a flap valve cylinder, an air knife and a collecting bin, the pneumatic flap valve is in transmission connection with the flap valve cylinder, the sieve plate is arranged on an airflow channel on one side of the pneumatic flap valve, the air knife is arranged corresponding to the inlet side of the sieve plate, the collecting bin is arranged below the sieve plate, and the access door is arranged on a bin body of the floating object processing mechanism.

The utility model discloses a stepped dam capable of automatically discharging silt, which relates to the technical field of water conservancy projects and comprises a dam main body, a dam main body and a dam main body, the weir bank is arranged in the energy dissipation pool, is arranged in an arc shape and is in stepped connection with the dam main body; the axis of the silt flushing pipe is parallel to the main flow direction of a river channel; the silt discharging pipe is arranged at the bottom of the energy dissipation pool, and a horn-shaped silt collecting opening is formed in the inlet end of the silt discharging pipe and is vertically communicated with the silt flushing pipe; a square flap valve is arranged at the inlet end of the silt flushing pipe, and the weight of the square flap valve is configured to be automatically opened when the water depth exceeds the top surface of the dam by 20 cm; according to the technical scheme, the weir bank which is arranged in the arc shape and connected with the dam body in the stepped mode is arranged in the energy dissipation pool, the hydraulic jump phenomenon can be generated in the energy dissipation pool, impact on a downstream riverbed is reduced, the silt discharging process can be completed without manual intervention, and the energy dissipation pool is particularly suitable for the unmanned management state in rural areas.

The invention relates to a battery system (100) with a battery compartment (102) for receiving battery cells and / or battery modules, wherein an intermediate space (106) adjoins the underside of the battery compartment (102), extending between a battery compartment floor (104) and a subfloor section (108). At least one water drain nozzle in the form of a flap valve (110) with two abutting lips (112) is arranged in the battery compartment floor (104) and is designed such that, in the event of overpressure in the battery compartment (102) or an accumulation of liquid in the area of ​​the flap valve (110), fluids escape from the battery compartment (102) via the flap valve (110), and, in the event of overpressure in the intermediate space (106), an inflow of gas from the intermediate space (106) into the battery compartment (102) is prevented.

The invention provides a system for detecting and controlling the rotating angle state of an air locking flap valve, and relates to the technical field of industrial automation. The detection and control system for the rotation angle state of the air locking flap valve comprises a sensor unit module, a data acquisition module, a signal transmission line module, a control and processing module, a control module and an execution module, and the sensor unit module is used for accurately sensing the rotation angle state of the air locking flap valve; the data acquisition module receives signals from the sensor unit and converts the signals into digital data for subsequent processing and analysis. When the sensor unit module detects that the rotation angle deviates from a set ideal range, the system can automatically send out an instruction to drive the execution module to adjust the rotation angle of the valve so as to ensure the stability and optimization of the production process, angle rotation data of the air locking flap valve can be automatically collected in real time, the sensitivity is high, and the cost is low. And intelligent control is carried out according to preset parameters and production requirements.

This utility model provides a gate-type flap valve, including a valve body, valve plate, valve shaft, drive device, and valve seat. Valve plates I and II have a double-door structure. A valve seat is installed inside the valve body, and graphite packing is mounted on the valve seat. The valve body inlet has a flared opening, and the gap between the valve seat, valve plate, and shaft seat is hidden at the lower end of the flared opening. This technical solution avoids the direct accumulation of dust and particles at the junction of the valve plate and shaft seat, and between the valve plate and valve seat, preventing issues such as incomplete valve closure or jamming during opening and closing, thus minimizing leakage and ensuring negative pressure.

This application relates to the field of power distribution network infrastructure technology and discloses an outdoor box-type substation, including a box shell. Exhaust fans are provided on both sides of the top of the box shell, and a static cyclone separator air inlet module is provided on the side wall of the box shell. A gravity flap valve is hinged to the bottom of the static cyclone separator air inlet module. A central clean air channel connecting to the interior of the box shell is provided in the static cyclone separator air inlet module, and a main air inlet louver valve is provided at the connection between the central clean air channel and the interior of the box shell. By using a movable pulley to multiply the minute linear thermal expansion displacement into a long-stroke flexible traction force, not only is the metal fatigue, deformation, and mechanical jamming problem that easily occurs with traditional rigid connecting rods under large temperature fluctuations outdoors completely avoided, but the power transmission can also ignore the complex electrical and physical obstacles inside the box, achieving ultimate flexibility and precise wiring from the central heat source to the outer dustproof components.

A valve (V) of the present invention comprises: a flap valve (1) having a fixed end either on an inner circumferential side or an outer circumferential side and allowing a free end to spring through; and a valve seat element (2) comprising an annular seat section (2c) on the side with the fixed end, a plurality of channels (2d) provided at circumferential intervals on one side of the free end of the seat section (2c) on the side with the fixed end, a seat section (2e) on the side with the free end, which allows the side with the free end of the flap valve (1) to sit on and be separated from it, and recess sections (2f) provided over the entire width between the channel (2d) and the seat section (2c) on the side with the fixed end, wherein the recess sections (2f) comprise a first recess section (2f1),which is provided in a ring shape on the side of the seat section on the side with the fixed end, and comprise a second recess section (2f2) which is provided in a ring shape on the side of the channel, so that it adjoins the first recess section (2f1), and has a greater depth than the first recess section (2f1).

A flapper assembly for a flush valve for a toilet is provided. The flapper assembly may be reconfigurable to work with different sized or configured flush valve bodies. Further, the flapper assembly is configured to avoid the pull chain getting tangled around various components of the flapper assembly. Further yet, the flapper assembly is configured to minimize a spacing between a pivot point / axis about which the seal member may pivot relative to the frame of the flapper assembly and the seal face of the seal member.

The utility model provides a preheater flap valve shaft hole sealing device which is characterized by comprising a flap valve outer shell, a protective shell welded to a shaft hole of the flap valve outer shell, a shaft rod and a sealing assembly. The gap between the protective shell and the shaft rod is larger than the gap between the shaft hole of the original shell; the sealing assembly comprises three graphite packings with the thickness of 12 mm, the space between the protective shell and the shaft rod is sequentially filled with the graphite packings, and the graphite packings are limited and fixed through an end face baffle. The baffle is pressed tightly through screws and nuts which are evenly distributed on the periphery of the baffle, and adjustable sealing press fit is achieved. Compared with a traditional single-layer 3mm asbestos plate sealing structure, the sealing service life is prolonged by more than three times by enlarging the space of the sealing cavity and arranging multiple layers of graphite packing, meanwhile, the gap between the baffle and the shaft rod is reduced, and the problem of air leakage at the shaft end is effectively solved. The device is simple in structure and particularly suitable for long-term stable sealing of the shaft end of the flap valve under the high-temperature working condition.

The utility model relates to a double -open door flap valve of large -scale high temperature high frequency action RTO system belongs to exhaust gas treatment equipment technical field, solves the problem that the existing large -scale high temperature flap valve often appears broken axle fault, cannot on -the -spot dismount maintenance, including door frame welding frame, the middle part of door frame welding frame is provided with two groups of flap valve exhaust inlet, the upper side of flap valve exhaust inlet is provided with the valve plate respectively, the valve plate is fixedly connected with valve plate pivot through valve plate connecting arm, one end of valve plate pivot is rotatably connected with the inner bearing seat of door frame welding frame middle part, the other end of valve plate pivot is rotatably connected with the outer bearing seat of hydraulic cylinder support outer end, the fixed end of flap valve drive hydraulic cylinder is connected with hydraulic cylinder support through hydraulic cylinder hinged support, the telescopic end of flap valve drive hydraulic cylinder is fixedly connected with valve pivot end portion through valve shaft connecting swing arm, it is reasonable in design, compact structure, firm connection, effectively solve the problem that slender axle is easy to break, and dismount and maintain conveniently, and the practicality is strong.

This utility model discloses an automatic negative pressure slag discharge and water release device for mining, relating to the technical field of mining equipment. It includes a main housing, characterized in that a mechanical control valve is installed at the top of the main housing; a sliding hole is formed on the upper inner wall of the main housing, and a central guide rod is slidably installed inside the sliding hole; a plastic float is connected to the lower end of the central guide rod; a water inlet pipe is connected to one side of the top of the main housing, and a negative pressure balance pipe is connected to the upper side of the water inlet pipe; a slag discharge port is formed at the lower end of the main housing, on the side away from the water inlet pipe, with the plastic float abutting against the slag discharge port; and flap valves are installed at the end of the water inlet pipe near the main housing and on the outside of the slag discharge port. This utility model is relatively small in size and has visual observation windows installed on both sides, facilitating movement and installation during actual underground construction. It can automatically drain water and efficiently discharge slag, eliminating the need for manual drainage. The overall structure is simple, and underground maintenance is convenient.

This invention provides a flap valve and a vacuum device. The flap valve includes a rotating shaft (1), an opening and closing element (2), and a valve plate adjusting mechanism (3). The rotating shaft (1) is supported on the outer shell (9) of the cavity to drive the opening and closing element (2) to rotate. The opening and closing element (2) is installed on the radial side of the rotating shaft (1) and rotates synchronously with the rotating shaft (1). The opening and closing element (2) is connected to the rotating shaft (1) through at least one valve plate adjusting mechanism (3) to adjust the relative position of the opening and closing element (2) and the rotating shaft (1). By setting the valve plate adjusting mechanism, this invention can adjust the position of the opening and closing element, thereby improving the airtightness of the device using the flap valve. It has a simple structure, is easy to install and maintain, and has strong versatility.

The utility model provides a vertical mill slag discharge port airlock unloading flap valve for cement production, which comprises a flap valve main body, and a receiving box used for guiding cement production waste slag is arranged in the flap valve main body, compared with the prior art, the vertical mill slag discharge port airlock unloading flap valve has the beneficial effects that the flap valve main body and an overturning control mechanism are additionally arranged, so that the vertical mill slag discharge port airlock unloading flap valve is convenient to operate; the overturning control mechanism is installed on the right rear side of the bearing box, a main hydraulic rod stretches out and draws back to drive a linkage rod to rotate, the right end of the linkage rod drives a discharging rotating shaft to rotate, the linkage rod increases the length of a power arm, and two sets of auxiliary hydraulic rods drive the right end of a discharging overturning plate to rotate in the rotating process of the discharging overturning plate. After the upper surface of the discharging turning plate is attached to the lower surface of the collecting groove, the sealing bottom frame is embedded to the outer side of the expansion sealing ring, the discharging turning plate presses the inflation bag to inflate and expand the interior of the expansion sealing ring, and therefore the closing sealing performance can be improved, and by additionally arranging the turning plate valve body, the turning control mechanism and the rear housing, dismounting and using can be convenient.

The utility model provides a hydraulic flap valve which comprises a bottom frame, symmetrically-distributed connecting rotating shafts are rotationally installed on the bottom frame, connecting rods are fixedly connected to the two connecting rotating shafts, a flap valve plate is fixedly installed on the two connecting rods jointly, and a sealing gasket is arranged between the flap valve plate and the bottom frame. Symmetrically distributed mounting blocks are fixedly connected to the surface of one side of the flap valve plate, two mounting rods are fixedly arranged on the two mounting blocks in a penetrating mode, one ends of the two mounting rods are jointly and fixedly connected with a fixing rod, a first mounting base and two second mounting bases are fixedly connected to the bottom frame, and a hydraulic cylinder is hinged to the first mounting base through a first pin shaft. A hydraulic rod end of the hydraulic cylinder is fixedly connected with a connecting block, and the connecting block is hinged with a pulling plate through a second pin shaft; when the hydraulic cylinder drives the hydraulic rod to retract, automatic closing and fixing of the flap valve plate can be achieved, the fixing effect on the flap valve plate is guaranteed, the flap valve plate is tightly attached to the sealing gasket all the time, water flow cannot flow backwards into a pipe, the backflow prevention effect is better, and actual popularization is facilitated.

A check valve having a valve body (101), a valve cover (102), and a flapper valve assembly. The valve body comprises a valve housing (104) and a central bore (105) formed through the valve housing. The central bore has at least a first bore section (126), a second bore section (127), and a third bore section (128). A transition from the second bore section to the third bore section is radiused such that the inner surface of the central bore at the transition is a continuous surface. The flapper assembly is disposed in the central bore of the valve body and comprises a flapper (132), a valve seat (136), and a hinge.

The rainwater grate sediment interceptor comprises an intercepting body, a rainwater grate, the self-gravity flap valve assembly, a filtering assembly and a drainage pipeline, the intercepting body is of a hollow frame structure, an inlet is formed in one side of the top of the intercepting body, the bottom of the intercepting body is connected with the drainage pipeline, and the filtering assembly is installed in the middle of the inner side of the intercepting body; the rainwater grate is installed at an inlet of the intercepting body and comprises a grate frame and a grating, the grating is installed on one side of the grate frame, the other side of the grate frame is communicated with the inlet of the intercepting body, the self-gravity flap valve assembly comprises a flap valve plate, the flap valve plate is located on the inner side of the grate frame, and the top of the flap valve plate is rotatably connected with the grate frame. The flap valve plate covers one side of the grating from top to bottom. Compared with the prior art, the device can obviously prevent dust and sand at the bottom of the side ditch of the road from entering the gutter inlet, and effectively solves the problem that the rainwater pipeline is frequently dredged due to dust and sand deposition.

The invention discloses a cyclone double-flap-valve discharging structure for a titanium dioxide spray dryer, and relates to the technical field of valves. The double-flap-valve discharging structure for the cyclone of the titanium dioxide spray dryer comprises a device main body, and the device main body comprises a discharging port, a valve plate and a heavy hammer; the device body further comprises a secondary sealing buffering force storage mechanism arranged at the bottom of the discharging port. According to the cyclone double-flap valve discharging structure for the titanium dioxide spray dryer, when the valve plate is closed, the valve plate firstly abuts against the bottom of a secondary sealing ring, a first annular plate is pushed to move upwards along a first sliding cavity to extrude gas, and the buffering and force storage effects are achieved; when the valve plate is opened, gas in the first sliding cavity can provide downward thrust for the valve plate through the secondary sealing ring, opening resistance is reduced, valve components can be protected, and action reliability is ensured.

The utility model discloses a rain and sewage diversion integrated drainage ditch which comprises a main drainage well, an inlet is formed in the upper portion of the main drainage well, a lifting table is installed in the main drainage well, the bottom of the lifting table is connected with a waterproof lifting air cylinder, and a diversion well is installed on the front side of the main drainage well. Flanges on the left side and the right side of the main drainage well are connected with flow dividing pipes, and a lower drainage pipe is installed at the lower end of the main drainage well. In the initial stage of rainfall, rainwater is discharged into the diversion well from the filter port through the flap valve and is filtered by the filter screen at the bottom of the diversion well, so that the rainwater is further filtered, and after the rainfall capacity is increased, the rainwater cannot be the clarity, the rainfall capacity and the turbidity of the rainwater in the initial stage of rainfall, and the rainwater is changed into rainwater and sewage mixed flowing water at the moment; the flap valve is closed, the lifting platform is lowered, the bottom space of the main drainage well is opened, and rain and sewage mixed water enters the lower drainage channel from the flow dividing pipe.

Vacuum pump as part of a vacuum wastewater system for emptying and flushing toilets and urinals - with a collecting inlet line which is connected to an inlet (2) in a housing (1) of the vacuum pump and is closed inside the housing by a flap valve (12) when the vacuum pump is not in operation, - with a cutting device (4) which is axially arranged and which crushes solid substances in the wastewater, - with an axially arranged screw spindle (5) which, when rotated, forms a water ring (6) necessary for generating the vacuum and draws in the wastewater by means of vacuum, - with an outlet (7) and - with a drive motor (9) for the cutting device (4) and the screw spindle (5), characterized in that the inlet (2) is continued inside the housing (1) as a tubular channel (10) and the outlet opening (11) from the channel (10) can be closed by the flap valve (12), supported by gravity or part of the gravity of the flap (13) of the flap valve (12).