阅读说明：本技术 一种高效粉碎式真空排污泵及卫生集便系统 (Efficient crushing type vacuum sewage pump and sanitary excrement collecting system ) 是由 赵斌 张道坤 姜军 杨永喜 卢志超 张建成 严升 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种高效粉碎式真空排污泵及卫生集便系统,包括依次连通设置的进污腔体、叶轮腔体及排污腔体,排污腔体一侧设有驱动机构,驱动机构与位于叶轮腔体内的叶轮机构连接,叶轮机构包括轮毂,轮毂为锥形轴结构,轮毂靠近排污腔体一端的端部面积大于另一端端部面积,所述轮毂外周面设置有螺旋状叶片,所述叶轮腔体与进污腔体之间设置有粉碎刀组件,所述粉碎刀组件包括固定设置的静刀及与驱动机构连接的动刀,静刀套在动刀外周,驱动机构能够带动动刀转动,与静刀共同作用将由进污腔体进入叶轮腔体的固态垃圾进行挤压粉碎,本发明的真空排污泵结构简单,扬程高,使用寿命长。(The invention relates to a high-efficiency crushing type vacuum sewage pump and a sanitary excrement collecting system, which comprise a sewage inlet cavity, an impeller cavity and a sewage discharge cavity which are sequentially communicated, wherein one side of the sewage discharge cavity is provided with a driving mechanism, the driving mechanism is connected with the impeller mechanism positioned in the impeller cavity, the impeller mechanism comprises a hub, the hub is of a conical shaft structure, the end part area of one end, close to the sewage discharge cavity, of the hub is larger than that of the other end, the outer peripheral surface of the hub is provided with a spiral blade, a crushing cutter assembly is arranged between the impeller cavity and the sewage inlet cavity and comprises a fixed cutter and a movable cutter connected with the driving mechanism, the fixed cutter is sleeved on the periphery of the movable cutter, the driving mechanism can drive the movable cutter to rotate, and the driving mechanism and the fixed cutter jointly act to extrude and crush solid garbage entering the impeller cavity from the sewage inlet cavity, and the, high lift and long service life.)

1. The utility model provides a high-efficient crushing-type vacuum sewage pump, its characterized in that, including the dirty cavity, impeller cavity and the blowdown cavity of advancing that communicate the setting in proper order, blowdown cavity one side is equipped with actuating mechanism, and actuating mechanism is connected with the impeller mechanism who is located the impeller cavity, and impeller mechanism includes wheel hub, and impeller hub is the conical shaft structure, and the tip area that wheel hub is close to blowdown cavity one end is greater than other end tip area, the wheel hub outer peripheral face is provided with the heliciform blade, be provided with crushing cutter unit spare between impeller cavity and the dirty cavity of advancing, crushing cutter unit spare including the fixed quiet sword that sets up and the sword of moving of being connected with actuating mechanism, quiet sword cover moves the sword periphery, and actuating mechanism can drive and move the sword rotation, will be extruded by the solid state rubbish that advances dirty cavity and get into the impeller cavity.

2. The efficient pulverizing type vacuum dredge pump of claim 1 wherein the end surface of the helical blade near the side of the dredge cavity is arc-shaped and is provided with a water inlet paddle board perpendicular to the end of the helical impeller.

3. The efficient pulverizing type vacuum sewage pump as claimed in claim 1, wherein the driving mechanism employs a motor, an output shaft of the motor is connected with a rotating shaft, one end of the rotating shaft is rotatably connected with the cavity wall of the sewage discharging cavity through a first supporting bearing, the other end of the rotating shaft is fixedly connected with the movable blade, the end portion of the rotating shaft connected with the movable blade is fixedly connected with an inner ring portion of a second supporting bearing, an outer ring portion of the second supporting bearing is fixedly connected with the inner side surface of the cavity wall of the impeller cavity through a plurality of connecting rib plates, and the first supporting bearing and the second supporting bearing are used for supporting the rotating shaft, so as to prevent the end portion of the rotating shaft from vibrating when the movable blade works.

4. The efficient crushing type vacuum sewage pump as claimed in claim 1, wherein the moving blade comprises a blade head, one end of the blade head is connected with the driving mechanism, the other end of the blade head is provided with a plurality of first blade teeth, a water inlet groove is formed in the blade head part between the adjacent first blade teeth and used for a fluid medium to flow through, the static blade comprises a connecting plate, the connecting plate is fixedly connected with the inner side surface of the sewage inlet cavity, the connecting plate is sleeved on the periphery of the blade head and provided with a plurality of second blade teeth, and the first blade teeth can jointly act with the second blade teeth to extrude and crush the solid garbage.

5. A high efficiency pulverizing type vacuum dredge pump as claimed in claim 4, wherein: the solid garbage crusher is characterized in that first cutting edges are arranged on two side edges of the outer side face of the first cutter tooth, cutter grooves are formed in the outer side face of the first cutter tooth, second cutting edges are arranged on two edges of each cutter groove, a saw-toothed structure is arranged on the inner side face of each second cutter tooth, and the first cutting edges and the second cutting edges can crush solid garbage under the combined action of the saw-toothed structures.

6. A high efficiency pulverizing type vacuum dredge pump as claimed in claim 4, wherein: the two end faces of the connecting plate are provided with second cutter teeth, the second cutter teeth of the two end faces of the connecting plate are distributed in a staggered mode and are equal in number, and the number of the second cutter teeth on the same side end face of the connecting plate is larger than that of the first cutter teeth.

7. A high efficiency pulverizing type vacuum dredge pump as claimed in claim 4, wherein: and a blocking rod is fixed on at least one cutter tooth of the movable cutter and is used for blocking out fixed foreign matters with high density, high hardness and small volume.

8. A high efficiency pulverizing type vacuum dredge pump as claimed in claim 1, wherein: the sewage inlet cavity is connected with a sewage inlet pipe, and the end part of the sewage inlet pipe is provided with a one-way check valve.

9. The efficient pulverizing type vacuum sewage pump as claimed in claim 1, wherein the bottom chamber wall of the sewage discharging chamber is an arc structure, and the lowest point of the bottom chamber wall is lower than the lowest point of the bottom chamber walls of the sewage inlet chamber and the impeller chamber, the bottom of the sewage discharging chamber is provided with a manual water outlet for manually discharging the liquid in the sewage discharging chamber, and the top of the sewage discharging chamber is connected with a sewage discharging pipe.

10. A sanitary waste collection system comprising a high efficiency pulverizing type vacuum waste pump as claimed in any one of claims 1 to 9, wherein said waste inlet chamber is connected to a toilet bowl via a drain valve, said toilet bowl is connected to a water pressurizing unit, said water pressurizing unit can flush water like the toilet bowl, said water pressurizing unit is connected to an external water source and an air source, said waste outlet chamber is connected to a waste tank, and waste water can be discharged into said waste tank.

Technical Field

The invention relates to the technical field of vacuum sewage pumps, in particular to a high-efficiency crushing type vacuum sewage pump and a sanitary excrement collecting system.

Background

At present, domestic sewage is mainly collected and discharged in two ways: gravity drainage and vacuum drainage. The gravity drainage pipeline is thick, the equipment volume is large, the occupied space is large, and the influence of terrain is obvious; but still remains the most widely used domestic sewage collection and discharge mode at present due to low early investment and simple installation. With the development of vacuum technology, the application of vacuum drainage mode is more and more extensive under the condition that the condition allows. The vacuum pipeline is thin, the equipment volume is relatively small, the pipeline is sealed without gas leakage, and the sanitation is good. However, the volume of the vacuum equipment manufactured by the cam pump and the like which are commonly used at present is still very large, and the vacuum equipment is difficult to apply in a narrow space area; and because domestic sewage is rich in solid impurities, the vacuum pipeline is very easy to block, so that the prior configuration of a crushing device is needed for crushing the solid impurities. The inventor finds that a few sewage pumps or vacuum pumps with a crushing function exist in the market at present, but the problems are more or less various. For example, the sewage pump with the crushing function has a small crushing cutter set, so that the crushing cutter set is easy to tip and damage; some domestic vacuum pumps with crushing functions have poor sealing, complex structure, small lift and high failure rate, and the popularization and application of the vacuum pumps are greatly limited.

Chinese patent publication No. CN101349271 provides a novel water ring vacuum pump, and this pump has crushing knife tackle, can realize earlier crushing of filth, can suck the vacuum through the impeller simultaneously to realize sewage discharge, the motor adopts special customization, and extension cantilever axle area impeller and the rotation of crushing knife tackle. The inventor finds that although the water ring pump realizes the integration of crushing, vacuum pumping and sewage discharge, the impeller part has a complex structure, three impellers are arranged side by side, so that the impeller cavity is overlong, the volume and the weight of the whole pump are increased, and meanwhile, due to the complex structure of the impellers, the pump is easy to damage and difficult to overhaul, and the mould opening and the production cost are high. In addition, due to the design of the cantilever shaft, the vibration of the cutter set positioned at the tail end of the shaft is strong when the cutter set rotates at a high speed, and the collision damage of the movable cutter and the static cutter is easily caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides the high-efficiency crushing type vacuum sewage pump which can effectively improve the pump lift, has high suction efficiency, small vibration of the crushing knife during working, long service life and good crushing effect of the crushing knife,

in order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a high-efficient crushing-type vacuum sewage pump, is including the dirty cavity, impeller cavity and the blowdown cavity of advancing that communicate the setting in proper order, and blowdown cavity one side is equipped with actuating mechanism, and actuating mechanism is connected with the impeller mechanism that is located the impeller cavity, and impeller mechanism includes wheel hub, and wheel hub is the conical shaft structure, and the tip area that wheel hub is close to blowdown cavity one end is greater than other end tip area, the wheel hub outer peripheral face is provided with the heliciform blade, be provided with crushing cutter assembly between impeller cavity and the dirty cavity of advancing, crushing cutter assembly including fixed stationary knife that sets up and the sword of moving of being connected with actuating mechanism, stationary knife cover is in moving the sword periphery, and actuating mechanism can drive and move the sword rotation, will get into the solid state rubbish of impeller cavity by advancing dirty cavity and extrude crushing.

Furthermore, the end face of the spiral blade close to one side of the sewage inlet cavity is an arc-shaped face, and a water inlet paddle plate perpendicular to the end part of the spiral impeller is arranged on the end face.

Further, actuating mechanism adopts the motor, the output shaft and the rotation axis of motor are connected, rotation axis one end is connected through the chamber wall rotation of first support bearing with the blowdown cavity, the other end with move sword fixed connection, and the rotation axis is connected the tip that moves the sword and the inner circle part fixed connection of second support bearing, the outer lane part of second support bearing is through the inboard surface fixed connection of the chamber wall of a plurality of connection floor and impeller cavity, first support bearing and second support bearing are used for supporting the rotation axis, prevent to move the vibration of sword during operation, the tip of rotation axis.

Further, move the sword and include the tool bit, tool bit one end is connected with actuating mechanism, and the other end sets up a plurality of first sword teeth, and the tool bit position between the adjacent first sword tooth sets up into water recess for fluid medium flows through, quiet sword includes the connecting plate, the medial surface fixed connection of connecting plate and the dirty cavity of advancing, the connecting plate cover just has a plurality of second sword teeth in the tool bit periphery, and the rotation of first sword tooth can be with second sword tooth combined action, smashes solid-state rubbish extrusion.

Furthermore, the edges of two sides of the outer side face of the first cutter tooth are provided with first cutting edges, the outer side face of the first cutter tooth is provided with cutter grooves, two edges of each cutter groove are provided with second cutting edges, the inner side face of each second cutter tooth is provided with a saw-toothed structure, and the first cutting edges and the second cutting edges can crush solid garbage under the combined action of the saw-toothed structures.

Furthermore, two end faces of the connecting plate are provided with second cutter teeth, the second cutter teeth of the two end faces of the connecting plate are distributed in a staggered mode and are equal in number, and the number of the second cutter teeth on the same side end face of the connecting plate is larger than that of the first cutter teeth.

Furthermore, a blocking rod is fixed on at least one knife tooth of the movable knife and used for blocking out fixed foreign matters with high density, high hardness and small volume.

Further, it is connected with into dirty pipe to advance dirty cavity, it is provided with one-way check valve to advance dirty tub of tip.

Furthermore, the bottom cavity wall of the sewage discharging cavity is of an arc-shaped structure, the lowest point of the bottom cavity wall is lower than the lowest point of the bottom cavity walls of the sewage discharging cavity and the impeller cavity, a manual water drain opening is formed in the bottom of the sewage discharging cavity and used for manually discharging liquid in the sewage discharging cavity, and a sewage discharging pipe is connected to the top of the sewage discharging cavity.

The invention also discloses a sanitary excrement collecting system which comprises the high-efficiency crushing type vacuum sewage pump, wherein the sewage inlet cavity is connected with the toilet stool through a drain valve, the toilet stool is connected with a water pressurizer, the water pressurizer can flush like the toilet stool, the water pressurizer is connected with an external water source and an air source, and the sewage discharge cavity is connected with the sewage tank and can discharge sewage into the sewage tank.

The invention has the beneficial effects that:

1. according to the vacuum sewage pump, the end part area of the hub close to one end of the sewage cavity is larger than that of the other end of the sewage cavity, the spiral blades are arranged on the peripheral surface of the hub, the overflowing area of a fluid medium inlet can be effectively increased, the cavitation erosion resistance of the blades is improved, meanwhile, the vacuum cavity formed by the sealed water ring between the spiral blades from the water inlet side to the water outlet side is gradually reduced, the pressurization rate of the medium in the vacuum cavity can be effectively improved, the lift of the vacuum sewage pump is improved, the guide wheel, the working impeller and the sewage wheel are not required to be arranged in a separated design, and the length of the impeller cavity is effectively reduced.

2. According to the vacuum sewage pump, the end face of the end part of the spiral impeller close to one side of the sewage inlet cavity is an arc-shaped face, and the spiral impeller is provided with the water inlet paddle board, so that the pumping efficiency of the vacuum sewage pump is effectively improved.

3. According to the vacuum sewage pump, the rotating shaft and the output shaft of the motor are separately arranged, the motor does not need to be specially customized, the universality of a power source is improved, meanwhile, the two ends of the rotating shaft are supported by the first supporting bearing, the second supporting bearing and the connecting rib plate, the strength and the rigidity of the rotating shaft are guaranteed, meanwhile, the movable knife fixed at the tail end of the rotating shaft can be effectively prevented from shaking caused by high-speed rotation, the precise matching of the movable knife and the static knife is guaranteed, and the service lives of the movable knife and the static knife are prolonged.

4. According to the vacuum sewage pump, the edges of the two outer sides of the first cutter teeth are provided with the first cutting edges, so that the cutting edges are sharp and are not easy to tip and wear, the outer side surfaces of the first cutter teeth are provided with the cutter grooves, the edges of the two sides of the cutter grooves are provided with the second cutting edges, the two end surfaces of the connecting plate of the static cutter are provided with the second cutter teeth, the inner side surfaces of the second cutter teeth are provided with the saw-toothed structures, the moving cutter rotates for one circle, dirt can be extruded and cut for multiple times and is advanced layer by layer, no large-particle solid dirt enters the cavity of the impeller.

5. According to the vacuum sewage pump, the bottom cavity wall of the sewage cavity is of an arc-shaped structure, and the lowest point of the bottom cavity wall of the sewage cavity is lower than the lowest point of the bottom cavity walls of the sewage inlet cavity and the impeller cavity, so that sewage can be discharged out of the sewage cavity as much as possible, and the sewage can be discharged completely during manual sewage discharge.

6. According to the vacuum sewage pump, the sewage inlet pipe is provided with the one-way check valve, so that the vacuum of the sewage inlet pipe is not leaked, and the phenomenon of back spraying of sewage in the sewage inlet cavity can be effectively prevented.

7. The vacuum sewage pump integrates sewage crushing, vacuum suction and sewage discharge, has small occupied area and easy installation, can effectively prevent pipeline blockage, improves the suction working efficiency of a sanitary excrement collecting system, and reduces the waiting time of personnel.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the entire internal structure of embodiment 1 of the present invention;

FIG. 2 is a schematic top view of the overall structure of embodiment 1 of the present invention;

FIG. 3 is a schematic side view of the overall structure of embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the connection between the partition board and the connecting rib in embodiment 1 of the present invention;

FIG. 5 is a schematic front view of a movable blade according to embodiment 1 of the present invention;

FIG. 6 is a schematic side view of a movable blade according to embodiment 1 of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line A of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic side view of a stationary blade according to embodiment 1 of the present invention;

FIG. 9 is a schematic cross-sectional view taken along line B of FIG. 8 in accordance with the present invention;

FIG. 10 is a schematic front view of an impeller mechanism according to embodiment 1 of the present invention;

FIG. 11 is a schematic side view of an impeller mechanism according to embodiment 1 of the present invention;

fig. 12 is a schematic structural view of a sewage draining chamber in embodiment 1 of the present invention;

FIG. 13 is a schematic view of the overall structure of embodiment 2 of the present invention;

wherein, 1, a sewage inlet cavity, 2, a sewage discharge cavity, 3, a sewage inlet pipe, 4, a one-way check valve, 5, a transparent end cover, 6, a motor, 7, a coupler, 8, a rotating shaft, 9, a grid plate, 10, a first support bearing, 11, a second support bearing, 12, a connecting rib plate, 13, a first chamber, 14, a second chamber, 15, a hub, 16, a spiral blade, 16-1, a vacuum chamber, 17, a water inlet paddle plate, 18, a first shaft sleeve, 19, a second shaft sleeve, 20, a rubber sealing ring, 21, a mechanical sealing element, 22, a moving blade, 22-1, a tool bit, 22-2, a connecting part, 22-3, a first cutter tooth, 22-4, a first cutter edge, 22-5, a guide groove, 22-6, a second cutter edge, 22-7, a water inlet groove, 22-8, a foreign matter blocking rod, 23, a static cutter, 23-1, a connecting plate, 23-2, a second cutter tooth, 23-3, a water passing groove, 24, a sewage discharge pipe, 25, a water discharge port, 26, a drain valve, 27, a toilet, 28, a control valve, 29, a first two-position three-way electromagnetic valve, 30, a water pressurizer, 31, a second two-position three-way electromagnetic valve, 32, a filtering and reducing valve, 33, a sewage tank, 34, a liquid level sensor, 35, a partition plate and 36 through holes.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Just as the background art introduces, current dredge pump head of taking shredding function is little, and the fault rate is high, smashes sword fragile, and to above-mentioned problem, the application provides a high-efficient crushing formula vacuum dredge pump.

In example 1, which is a typical embodiment of the present application, as shown in fig. 1 to 12, a high-efficiency pulverizing type vacuum sewage pump includes a sewage inlet cavity 1, an impeller cavity and a sewage outlet cavity 2, which are sequentially disposed, wherein the sewage inlet cavity and the impeller cavity are communicated through a channel, and the sewage outlet cavity and the impeller cavity are communicated through a channel.

Advance dirty cavity's top chamber wall and be connected with into dirty pipe 3, advance dirty inside the pipe stretches into dirty cavity, sewage can get into dirty cavity through advancing dirty pipe, advance the tip of dirty pipe and install one-way check valve 4, one-way check valve not only can guarantee into dirty pipe vacuum and do not reveal, can effectively prevent to advance dirty internal sewage back-spray phenomenon simultaneously, the contralateral chamber wall that is located impeller cavity place of advancing dirty cavity is provided with the viewing aperture, viewing aperture department installs transparent end cover 5, and transparent end cover can observe crushing cutter unit spare and the solid deposition condition when guaranteeing not having sewage to leak, and the last mark of transparent end cover has the minimum liquid level that dirty cavity, impeller cavity and the blowdown cavity of advancing can form the water ring simultaneously. And the sewage inlet cavity is also provided with a water replenishing port for replenishing liquid into the sewage inlet cavity.

One side of the sewage discharging cavity is provided with a driving mechanism, the driving mechanism adopts a motor 6, the motor adopts a three-phase 380V alternating current motor, an output shaft of the motor is connected with one end of a rotating shaft 8 through a coupler 7 and can drive the rotating shaft to rotate through the coupler, the coupler is fixed on a plurality of grid plates 9, the grid plates are distributed along the circumference, one end of each grid plate is fixedly connected with the sewage discharging cavity, and the other end of each grid plate is fixed on a motor shell of the motor.

The end part of the rotating shaft connected with the coupler is rotationally connected with the cavity wall of the sewage drainage cavity through a first supporting bearing 10, the other end of the rotating shaft extends into the impeller cavity, the rotating shaft is positioned at the eccentric position of the impeller cavity (the position below the central position of the impeller cavity), one end of the rotating shaft extending into the impeller cavity is connected with a second supporting bearing 11, the rotating shaft is fixedly connected with the inner ring of the second supporting bearing, the outer ring of the second supporting bearing is fixedly connected with one end of a plurality of connecting rib plates 12, the other end of the connecting rib plates is fixedly connected with the inner side surface of the cavity wall of the impeller cavity, one side end surface of each connecting rib plate is fixedly connected with a partition plate 35 vertical to the connecting rib plate, the partition plate is fixedly connected with the inner side surface of the cavity wall of the impeller cavity, the impeller cavity is divided into a first cavity 13 and a, the sewage is circulated through the space between the connecting rib plates.

The rotation axis adopts first support bearing and second support bearing to support, when guaranteeing rotation axis intensity and rigidity, can effectively prevent the terminal fixed of rotation axis from moving the vibrations that arouses because of high-speed rotation, guarantees to move the precision fit of sword and quiet sword to the extension moves the life of sword and quiet sword.

The impeller mechanism is connected to a shaft section of the rotating shaft in the first chamber, the impeller mechanism comprises a hub 15 fixedly connected to the rotating shaft, and two spiral blades 16 distributed along the axis direction of the hub are fixedly connected to the outer peripheral surface of the hub.

After the impeller cavity is filled with liquid, the hub rotates, the spiral blades can drive the liquid to rotate to form a sealed water ring, and the sealed water ring starts to suck vacuum, so that a vacuum space is quickly formed in the sewage inlet cavity.

The hub adopts a conical shaft structure, the end surface area close to one end of the sewage inlet cavity is smaller than that of the other end of the sewage inlet cavity, the overflowing area of the sewage in the first cavity can be effectively increased, the cavitation erosion resistance of the two spiral blades is improved, the vacuum cavity 16-1 formed by the sealing water ring is gradually reduced along the direction from the water inlet end to the water discharge end of the first cavity when the impeller mechanism works, the pressurizing rate and the level pressurization of the vacuum cavity can be effectively improved, and therefore the lift of the vacuum sewage pump is improved.

The spiral impeller is provided with an arc-shaped cross section at the end part close to the sewage inlet cavity, the radian is 45 degrees, and a water inlet paddle board 17 vertical to the surface of the spiral impeller is fixed, so that the optimal cavitation resistance and the optimal flow capacity can be achieved, and the suction efficiency of the vacuum sewage pump is effectively improved.

The impeller mechanism of this embodiment does not need the separate design of traditional guide wheel, work impeller and blowdown wheel, has effectively reduced the length of impeller cavity.

The two sides of the hub are respectively provided with a first shaft sleeve 18 and a second shaft sleeve 19 which are fixed on a rotating shaft, the first shaft sleeve and the second shaft sleeve are used for positioning the hub on the rotating shaft, one side of the first supporting bearing is provided with a rubber sealing ring 20, a mechanical sealing element 21 is arranged between the rubber sealing ring and the first shaft sleeve, the mechanical sealing element adopts the existing mechanical sealing element for the shaft, the specific structure of the mechanical sealing element is not described in detail, and the rubber sealing ring and the mechanical sealing element are used for ensuring that sewage does not leak.

And a crushing cutter assembly is arranged in a connecting channel between the sewage inlet cavity and the impeller cavity and comprises a movable cutter 22 fixedly connected with the end part of the rotating shaft and a static cutter 23 fixedly connected with the inner side surface of the wall of the sewage inlet cavity.

The movable knife comprises a knife head 22-1, the knife head is fixedly connected with the end part of the rotating shaft through a connecting part 22-2 and a bolt, the knife head is of a cylindrical structure, one side end face of the knife head is integrally connected with the connecting part, the other side end face of the knife head is uniformly provided with four first knife teeth 22-3 along the circumference, the inner side faces of the first knife teeth are arc-shaped faces, first knife edges 22-4 are arranged at the edges of two sides of the outer side faces of the first knife teeth, a knife groove 22-5 arranged along the axial direction of the knife head is arranged in the middle of the outer side faces of the first knife teeth, and second knife edges 22-.

The cutter head part between two adjacent first cutter teeth is provided with a water inlet groove 22-7 for facilitating sewage to flow through the crushing cutter assembly and enter the cavity of the impeller.

A trapezoidal foreign matter blocking rod 22-8 is fixed on one of the first cutter teeth, so that solid foreign matters with high density, high hardness and small volume can be blocked and can be deposited at the bottom of the sewage inlet cavity.

The fixed knife comprises a connecting plate 23-1, the connecting plate is fixed on the inner side face of the cavity wall of the sewage inlet cavity, an opening is formed in the middle of the connecting plate, the connecting plate is sleeved on the periphery of the knife head through the opening, the gap between the connecting plate and the outer side face of the knife head is about 0.5mm, five second knife teeth 23-2 are uniformly arranged on the two side end faces of the connecting plate along the circumference, the second knife teeth are of a conical structure, 7 layers of trapezoidal grooves are formed in the inner side face of each second knife tooth to form a zigzag structure, the gap between the inner side face of each second knife tooth and the outer side face of each first knife tooth is about 0.5mm, the second knife teeth on the two side end faces of the front side and the rear side of the connecting plate are arranged in a staggered mode, water passing grooves 23.

In this embodiment, the quantity of second sword tooth is greater than the quantity of first sword tooth, can guarantee that first sword tooth and second sword tooth always can stagger certain angle, when having avoided sewage velocity of flow to reduce, also guarantees that solid-state filth can all be smashed by the extrusion at any moment.

In this embodiment, under the vacuum effect, solid-state filth can get into the space between first sword tooth and the second sword tooth, moves the sword and rotates the round every time, and the first cutting edge of first sword tooth and the serration structure of second cutting edge cooperation second sword tooth medial surface carry out many times extrusion cutting to solid-state filth, ensure that the filth is smashed completely, have ensured not have the solid-state filth of large granule and have got into the impeller cavity.

The bottom chamber wall of blowdown cavity is the arc structure, has certain water storage space, and the top chamber wall is planar structure, the bottom chamber wall of blowdown cavity highly is less than impeller cavity and advances the bottom chamber wall height of dirty cavity, set up drain 25 on the bottom chamber wall of blowdown cavity, bottom chamber wall adopts the arc structure, can make the stagnant liquid in the blowdown cavity gather in the bottom of blowdown cavity, is convenient for discharge through the manual of drain, the drain can also be connected with electric ball valve through the internal thread structure to realize the automatic control of blowdown cavity evacuation, in order to reduce the volume of blowdown cavity as far as possible, blowdown cavity top chamber wall is planar structure, need not to leave water storage space, and the top chamber wall of blowdown cavity is connected with blow off pipe 24, and sewage can discharge through the blow off pipe.

When the daily sewage pump normally works, sewage is discharged through the sewage discharge pipe, the water outlet is closed by utilizing the nut or the valve, and when the sewage pump does not work, residual sewage in the sewage cavity is discharged by utilizing the water outlet.

When the vacuum sewage discharge pump of the embodiment operates, firstly, liquid (water) is injected into the sewage inlet cavity, the impeller cavity and the sewage discharge cavity through the sewage inlet pipe until the water level reaches the liquid level marked on the transparent end cover, the motor drives the rotating shaft to rotate, the spiral impeller rotates to drive the liquid to rotate to form a sealed water ring, vacuum pumping is started to quickly form a vacuum space in the sewage inlet cavity, after a set vacuum degree is reached, the one-way check valve is opened, sewage enters the sewage inlet cavity, moves towards the impeller cavity under the action of the vacuum force, the movable knife rotates and works together with the stationary knife to crush solid sewage, solid foreign matters with high density, high hardness and small volume sink to the bottom of the sewage inlet cavity under the action of the foreign matter blocking rod, the sewage is conveyed to the sewage discharge cavity through the vacuum cavity formed by the impeller and the water ring, and a certain lift medium is formed in the, the sewage is discharged through a sewage discharge pipe, and the lift can reach about 5 m.

The vacuum sewage pump of the embodiment has the external dimension of 315mm 128.5mm 89mm, the weight of only 25kg, small floor area, light weight and convenient installation.