CN113819067A

CN113819067A - Prevent blockking up dredge pump

Info

Publication number: CN113819067A
Application number: CN202111045384.5A
Authority: CN
Inventors: 汪卫平; 唐子一; 李建新; 黄文龙; 吴海洋; 汪渌
Original assignee: Anhui Kaite Pump Co ltd
Current assignee: Anhui Kaite Pump Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2021-12-21
Anticipated expiration: 2041-09-07
Also published as: CN113819067B

Abstract

The invention relates to the technical field of sewage pumps, and discloses an anti-blocking submerged sewage pump which comprises a pump body, wherein a water inlet pipe is arranged at the bottom of the pump body, a water outlet pipe is arranged on the side wall of the pump body, an annular groove is formed in one end, close to the pump body, inside the water inlet pipe, a buffer plate is connected inside the annular groove in a sliding manner, a pressure spring is fixedly connected between the upper side of the buffer plate and the annular groove, a sleeve is connected inside the water inlet pipe in a sliding manner, one end of the sleeve is abutted against the buffer plate, a mounting ring is fixedly mounted on the outer side of the other end of the sleeve, and a main filter screen is arranged at one end, close to the mounting ring, of the sleeve; the intake pipe inner wall is kept away from pump body one end and is equipped with the square groove, square groove and annular intercommunication, the sleeve is kept away from collar one end fixed mounting and is had the stopper, the inlet shaft side is equipped with the water conservancy diversion hole, the correspondence of sleeve shaft side is equipped with the intercommunicating pore. The impurity of main filter screen downside need not artifically get rid of, alleviates the labour, improves work efficiency.

Description

Prevent blockking up dredge pump

The technical field is as follows:

the invention relates to the technical field of sewage pumps, in particular to an anti-blocking sewage pump.

Background art:

the sewage pump is a pump product which is connected with a motor and simultaneously submerged to work under liquid, and compared with a common horizontal pump or a vertical sewage pump, the sewage pump has compact structure and small occupied area. The installation and maintenance are convenient, the large-scale dredge pump is generally provided with an automatic coupling device to carry out automatic installation, the installation and maintenance are quite convenient, and the continuous operation time is long. The sewage pump has the advantages that the pump and the motor are coaxial, the shaft is short, the rotating parts are light in weight, so that the load (radial direction) borne by the bearings is relatively small, and the service life is much longer than that of a common pump. The submerged sewage pump is a new generation pump product which is successfully developed by combining the use characteristics of domestic water pumps on the basis of introducing foreign advanced technology, and has unique effect on the aspect of discharging solid particles and long fiber garbage.

The current submerged sewage pump is equipped with the filter screen in inlet tube department to block the bold impurity in the sewage, prevent that the bold impurity from getting into the inside jam that causes of the pump body, but the inlet tube is in the liquid level downside, and the impeller rotation produces the pressure to pump body inside in inlet tube department, makes bold impurity adsorb on the filter screen easily, uses for a long time and leads to the sewage pump to block up easily, needs artifical clearance impurity this moment, influences blowdown work, reduces work efficiency.

The invention content is as follows:

aiming at the problems in the prior art, the invention aims to provide an anti-blocking sewage pump.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: an anti-blocking sewage pump comprises a pump body, wherein a water inlet pipe is arranged at the bottom of the pump body, a water outlet pipe is arranged on the side wall of the pump body, an annular groove is formed in one end, close to the pump body, inside the water inlet pipe, a buffer plate is connected inside the annular groove in a sliding mode, a pressure spring is fixedly connected between the upper side of the buffer plate and the annular groove, a sleeve is connected inside the water inlet pipe in a sliding mode, one end of the sleeve is abutted to the buffer plate, a mounting ring is fixedly mounted on the outer side of the other end of the sleeve, and a main filter screen is arranged at one end, close to the mounting ring, of the sleeve;

the intake pipe inner wall is kept away from pump body one end and is equipped with the square groove, square groove and annular intercommunication, the sleeve is kept away from collar one end fixed mounting and is had the stopper, stopper one side and buffer board butt, stopper opposite side and annular butt, the intake pipe axle side is equipped with the water conservancy diversion hole, the correspondence of sleeve axle side is equipped with the intercommunicating pore.

Preferably, the main filter screen is sunken towards one side close to the pump body, and the cross-sectional shape of main filter screen is trapezoidal.

Preferably, the communication holes are provided with a plurality of groups, the communication holes are annularly distributed around the side wall of the sleeve, the diameter of each communication hole is equal to that of each flow guide hole, the number of the communication holes is equal to that of the flow guide holes, and the flow guide holes are opposite to the communication holes vertically.

Preferably, the two sides of the main filter screen are fixedly connected with connecting plates, and the connecting plates are fixedly connected with the mounting ring through fastening bolts.

Preferably, a positioning rod is connected to the mounting ring in a sliding mode, one end of the positioning rod is connected with the square groove in a sliding mode, a pull plate is fixedly mounted at the other end of the positioning rod, a tension spring is sleeved on the outer side of the positioning rod, one end of the tension spring is fixedly connected with the mounting ring, and the other end of the tension spring is fixedly connected with the pull plate.

Preferably, water conservancy diversion hole upside is equipped with first crown plate, water conservancy diversion hole downside is equipped with the second crown plate, the equal fixed mounting of first crown plate and second crown plate is in the inlet tube outside, fixed mounting has inferior filter screen between first crown plate and the second crown plate, inferior filter screen slope sets up.

Preferably, the internal diameter of first crown plate equals with the internal diameter of second crown plate, the external diameter of first crown plate is greater than the external diameter of second crown plate, pump body one side fixed connection is kept away from with first crown plate to inferior filter screen one end, pump body one side fixed connection is kept away from with the second crown plate to the inferior filter screen other end.

Preferably, the buffer plate is an annular plate, the inner diameter of the buffer plate is smaller than that of the sleeve, and the outer diameter of the buffer plate is smaller than that of the ring groove.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, large-particle impurities are blocked by the main filter screen arranged at the end part of the sleeve, the internal blockage of the pump body is prevented, more impurities are accumulated on the lower side of the main filter screen after long-time use, so that the water yield of the water outlet pipe is reduced, the upward suction force on the main filter screen drives the buffer plate to move upwards through the sleeve, the intercommunicating pore is matched with the flow guide hole, so that sewage enters from the side surface of the water inlet pipe, the suction force on the bottom side of the main filter screen is reduced, the sleeve and the main filter screen are driven to move downwards under the elastic action of the pressure spring, the impurities are separated from the surface of the main filter screen under the action of the gravity of the impurities and the vertical vibration of the main filter screen, the sewage enters into the water inlet pipe through the sleeve, the sewage discharge work is completed, the impurities on the lower side of the main filter screen do not need to be manually removed, the labor force is reduced, and the working efficiency is improved.

2. According to the invention, the secondary filter screen is installed through the first ring plate and the second ring plate, the secondary filter screen is obliquely arranged, one end of the secondary filter screen is fixedly connected with one side, away from the pump body, of the first ring plate, and the other end of the secondary filter screen is fixedly connected with one side, away from the pump body, of the second ring plate, so that large impurities in sewage can be filtered when the sewage enters from the side surface of the water inlet pipe.

Description of the drawings:

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;

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

FIG. 2 is a schematic view of the inner structure of the water inlet pipe according to the present invention;

FIG. 3 is a schematic view of a secondary screen structure of the present invention;

FIG. 4 is a bottom view of the sleeve of the present invention;

FIG. 5 is a schematic view of the square groove structure of the present invention;

FIG. 6 is a schematic view of a main screen structure according to the present invention;

FIG. 7 is a schematic perspective view of a water inlet pipe according to the present invention;

FIG. 8 is a schematic view of a ring groove structure according to the present invention;

FIG. 9 is an enlarged view of a portion of the present invention at A in FIG. 1;

FIG. 10 is an enlarged view of a portion of the present invention at B of FIG. 1;

FIG. 11 is a perspective view of a shroud according to the present invention;

FIG. 12 is a cross-sectional view taken along line C-C of FIG. 11 in accordance with the present invention;

wherein: 1. a pump body; 2. a water inlet pipe; 201. a ring groove; 202. a square groove; 203. a flow guide hole; 3. a water outlet pipe; 4. a buffer plate; 5. a pressure spring; 6. a sleeve; 601. a communicating hole; 7. a limiting block; 8. a mounting ring; 9. a main filter screen; 10. a connecting plate; 11. fastening a bolt; 12. positioning a rod; 13. pulling a plate; 14. a tension spring; 15. a first ring plate; 16. a second ring plate; 17. a secondary filter screen; 18. a support plate; 1801. mounting holes; 19. a substrate; 1901. positioning holes; 20. a connecting rod; 21. enclosing plates; 2101. a circular hole; 22. a damper plate; 2201. an arc groove; 23. a first spring; 24. a ball bearing; 25. a pull rod; 26. positioning a plate; 27. A second spring; 28. a limiting plate; 2801. a limiting groove.

The specific implementation mode is as follows:

in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Example 1:

as shown in fig. 1-8, a prevent blockking up dredge pump, including the

pump body

1, 1 bottom of the pump body is equipped with

inlet tube

2, 1 lateral wall of the pump body is equipped with

outlet pipe

3, 2 inside one ends of being close to the pump body of inlet tube 1 are equipped with annular 201, the inside sliding connection of annular 201 has buffer board 4, fixedly connected with pressure spring 5 between 4 upsides of buffer board and the annular 201, 2 inside sliding connection of inlet tube has

sleeve

6, 6 one end of sleeve and 4 butts of buffer board, 6 other end outside fixed mounting of sleeve have collar 8, sleeve 6 is close to collar 8 one end and is equipped with main filter screen 9, main filter screen 9 is sunken to being close to 1 one side of the pump body, main filter screen 9's cross sectional shape is trapezoidal.

2 inner walls of inlet tube keep away from 1 one end of the pump body and are equipped with square groove 202, square groove 202 and annular 201 intercommunication, 8 one end fixed mounting of collar are kept away from to sleeve 6 has stopper 7, stopper 7 one side and 4 butts of buffer board, 7 opposite sides of stopper and annular 201 butts, 2 axial sides of inlet tube are equipped with water

conservancy diversion hole

203, 6 axial side correspondences of sleeve are equipped with intercommunicating pore 601, intercommunicating pore 601 is equipped with a plurality of groups, a plurality of groups intercommunicating pore 601 distributes around the annular of sleeve 6 lateral walls, the diameter of intercommunicating pore 601 equals the diameter of water conservancy diversion hole 203, the quantity of intercommunicating pore 601 equals with the quantity of water conservancy diversion hole 203, water conservancy diversion hole 203 is just right from top to bottom with intercommunicating pore 601.

Specifically, the water inlet pipe 2 is positioned below the liquid level during operation, the impeller inside the pump body 1 rotates at high speed to generate larger suction at the inlet of the water inlet pipe 2, so that sewage is sucked into the pump body 1 and then discharged through the water outlet pipe 3, the discharge capacity is gradually reduced due to the fact that the lower side of the suction main filter screen 9 at the end part of the water inlet pipe 2 is blocked by more massive impurities during long-time operation, upward thrust is generated at the lower side of the main filter screen 9 at the moment, the sleeve 6 moves upwards relative to the water inlet pipe 2, the communicating hole 601 is matched with the flow guide hole 203 so that the sewage enters from the side surface of the water inlet pipe 2, the suction force applied to the bottom side of the main filter screen 9 is reduced, the sleeve 6 and the main filter screen 9 are driven to move downwards under the elastic force of the pressure spring 5, under the action of gravity of the impurities and the vertical vibration of the main filter screen 9, the impurities are separated from the surface of the main filter screen 9, the sewage enters the water inlet pipe 2 through the sleeve 6, and the sewage discharge operation is completed, the impurities on the lower side of the main filter screen 9 are not required to be removed manually, labor force is reduced, and working efficiency is improved.

The two sides of the main filter screen 9 are fixedly connected with connecting plates 10, and the connecting plates 10 are fixedly connected with the mounting ring 8 through fastening bolts 11.

The mounting ring 8 is connected with a positioning rod 12 in a sliding mode, one end of the positioning rod 12 is connected with the square groove 202 in a sliding mode, the other end of the positioning rod 12 is fixedly provided with a pull plate 13, the outer side of the positioning rod 12 is sleeved with a tension spring 14, one end of the tension spring 14 is fixedly connected with the mounting ring 8, and the other end of the tension spring 14 is fixedly connected with the pull plate 13.

Specifically, before the pump body 1 works, the sleeve 6 needs to be installed, one end of the sleeve 6 with a limiting block 7 is close to the inlet of the water inlet pipe 2, the limiting block 7 is aligned with the square groove 202, the sleeve 6 is inserted into the water inlet pipe 2, the bottom of the sleeve 6 is pressed to enable the top of the sleeve 6 to be abutted to the buffer plate 4, the buffer plate 4 is driven to move upwards, the pressure spring 5 is in a compression state, one end of the positioning rod 12 is abutted to the edge of the water inlet pipe 2, the pull plate 13 moves towards the side far away from the installation ring 8, the tension spring 14 is in a tension state, the sleeve 6 is rotated by 90 degrees (clockwise or anticlockwise), the positioning rod 12 is aligned to the square groove 202, the positioning rod 12 is driven to be inserted into the square groove 202 under the elastic action of the tension spring 14 to axially position the sleeve 6, meanwhile, large impurities can be prevented from entering the water inlet pipe 2 through the square groove 202 to prevent blockage, the buffer plate 4 is driven to move downwards under the elastic action of the pressure spring 5 after hands are loosened, the limiting block 7 is abutted between the buffer plate 4 and the annular groove 201, so that the sleeve 6 can only move up and down along the water inlet pipe 2 after being installed, and the running stability of the device is improved.

The water conservancy diversion hole 203 upside is equipped with first crown plate 15, water conservancy diversion hole 203 downside is equipped with second crown plate 16, the equal fixed mounting of first crown plate 15 and second crown plate 16 is in the 2 outsides of inlet tube, fixed mounting has inferior filter screen 17 between first crown plate 15 and the second crown plate 16, inferior filter screen 17 slope sets up.

The internal diameter of first crown plate 15 equals with the internal diameter of second crown plate 16, the external diameter of first crown plate 15 is greater than the external diameter of

second crown plate

16, 1 one side fixed connection of the pump body is kept away from with first crown plate 15 to inferior filter screen 17 one end, 1 one side fixed connection of the pump body is kept away from with second crown plate 16 to inferior filter screen 17 other end.

It is specific, inferior filter screen 17 slope sets up and inferior filter screen 17 one end keeps away from 1 one side fixed connection of the pump body with first crown plate 15, the other end keeps away from 1 one side fixed connection of the pump body with second crown plate 16 and makes sewage can filter the bold impurity in the sewage when entering from inlet tube 2 side, intercommunicating pore 601 separates with water conservancy diversion hole 203 when pressure spring 5 drives sleeve 6 and moves down, water conservancy diversion hole 203 is stifled by sleeve 6's lateral wall and dies, inferior filter screen 17 reduces with the suction that water conservancy diversion hole 203 is just to the department, impurity drops in sewage under the action of gravity, further avoid impurity to block up, automatic edulcoration, do not need manual intervention.

Buffer plate 4 is the annular plate, the internal diameter of buffer plate 4 is less than the internal diameter of sleeve 6, the external diameter of buffer plate 4 is less than the diameter of annular 201. The top of the sleeve 6 convenient to use is abutted against the buffer plate 4, so that the installation stability of the sleeve 6 is improved, and meanwhile, the sewage convenient to use enters the pump body 1.

Example 2:

on the basis of example 1, as shown in fig. 1 and fig. 9-12; the bottom of the pump body 1 is provided with a support plate 18, the bottom of the support plate 18 is provided with a substrate 19, the substrate 19 and the support plate 18 are fixedly connected through a plurality of groups of connecting rods 20, the plurality of groups of connecting rods 20 are annularly distributed around the substrate 19, an enclosing plate 21 is fixedly installed on the upper side of the support plate 18, a damping plate 22 is slidably connected with the enclosing plate 21, the damping plate 22 is an annular plate, the outer diameter of the damping plate 22 is smaller than the inner diameter of the enclosing plate 21, the inner diameter of the damping plate 22 is equal to the diameter of an installation hole 1801, a plurality of groups of first springs 23 are fixedly connected between the damping plate 22 and the support plate 18, a plurality of groups of arc grooves 2201 are arranged on the upper side of the damping plate 22, a plurality of groups of arc grooves 2201 are annularly distributed around the center of the damping plate 22, balls 24 are rotatably installed inside the arc grooves 2201, and the balls 24 are in rolling connection with the pump body 1;

the middle of the support plate 18 is provided with a mounting hole 1801, the middle of the substrate 19 is provided with a positioning hole 1901, the diameter of the mounting hole 1801 is larger than the outer diameter of the first annular plate 15, and the diameter of the positioning hole 1901 is larger than the diameter of the mounting hole 1801. The diameter of mounting hole 18101 is greater than the external diameter of first crown plate 15 and is convenient for inlet tube 2 to pass through installation piece 1801 for pump body 1 bottom can be with ball 24 good contact, and the production material of base plate 19 can be practiced thrift on the one hand in the design of locating hole 1901, and stability when on the other hand improves base plate 19 and installs, makes base plate 19 can still have good stability on surperficial unevenness, is favorable to going on of blowdown work.

Specifically, the pump body 1 is arranged on the upper side of the supporting plate 18, a base similar to a circular truncated cone is formed by the supporting plate 18, the base plate 19 and the connecting rod 20, the stability of the pump body 1 in working is improved, the diameter of the mounting hole 1801 is larger than the outer diameter of the first annular plate 15, the water inlet pipe 2 is conveniently inserted into the bottom of the supporting plate 18, the connecting rod 20 plays a role in supporting and simultaneously performs anti-collision protection on the water inlet pipe 2, the enclosing plate 21 arranged on the upper side of the supporting plate 18 radially supports the pump body 1, the damping plate 22 is pressed down under the action of gravity of the pump body 1, the first spring 23 is in a compressed state, an external motor drives an impeller inside the pump body to rotate to work, strong vibration is generated, parts are easily damaged, the first spring 23 absorbs energy during vibration and drives the damping plate 22 to slightly move up and down, the damping and buffering effect is achieved, on one hand, the parts are protected, on the other hand, noise pollution is reduced, friction between the bottom of the pump body 1 and the damping plate 22 is reduced through the design of the arc groove 2201 on the upper side of the damping plate 22 and the balls 24, the pump body 1 is conveniently controlled to rotate, so that the direction of the water outlet pipe 3 is controlled, and the water outlet angle is easy to adjust;

adopt detachable to be connected between the pump body 1 and the base, can change when the base rusts or damages, guarantee simultaneously that the relative backup pad 18 of the pump body 1 can take place rotatoryly, solve the great problem of traditional submerged dredge pump use limitation.

The utility model discloses a pump body, including pump body 1 lateral wall fixed mounting, limiting plate 28's external diameter is less than the internal diameter of bounding wall 21, the limiting plate 28 outside is equipped with a plurality of groups spacing groove 2801, bounding wall 21 top both sides all are equipped with round hole 2101, sliding connection has pull rod 25 in the round hole 2101, pull rod 25 one end and spacing groove 2801 joint, the pull rod 25 other end runs through round hole 2101 fixed mounting has locating plate 26, fixedly connected with second spring 27 between locating plate 26 and the bounding wall 21.

Specifically, before the pump body 1 is installed, the positioning plates 26 on the two sides of the coaming 21 are pulled outwards to drive the pull rod 25 to move in the direction away from the pump body 1, the second spring 27 is in a stretching state, then the water inlet pipe passes through the installation hole 1801, the pump body 1 is installed on the upper side of the support plate 18, the position of the water outlet pipe 3 is determined by rotating the pump body 1, then the positioning plates 26 are loosened, the pull rod 25 is driven to move in the direction close to the pump body 1 under the elastic force of the second spring 27, one end of the pull rod 25 is clamped with the limiting groove 2801, the limiting groove 2801 is in a long strip shape, the two ends are in an arc structure, the positioning plates 26 are matched with the pull rod 25 to radially position the pump body, so that the pump body 1 can only move up and down relative to the support plate 18 and cannot rotate, when the angle of the water outlet pipe 3 of the pump body 1 needs to be adjusted in the using process, the operation is convenient, the pump body 1 does not need to be lifted and then rotates, meanwhile, the stability is high.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An anti-clogging sewage pump is characterized in that: the water pump comprises a pump body (1), wherein a water inlet pipe (2) is arranged at the bottom of the pump body (1), a water outlet pipe (3) is arranged on the side wall of the pump body (1), an annular groove (201) is formed in one end, close to the pump body (1), inside the water inlet pipe (2), a buffer plate (4) is connected inside the annular groove (201) in a sliding mode, a pressure spring (5) is fixedly connected between the upper side of the buffer plate (4) and the annular groove (201), a sleeve (6) is connected inside the water inlet pipe (2) in a sliding mode, one end of the sleeve (6) is abutted to the buffer plate (4), a mounting ring (8) is fixedly mounted on the outer side of the other end of the sleeve (6), and a main filter screen (9) is arranged at one end, close to the mounting ring (8), of the sleeve (6);

the utility model discloses a pump body, including inlet tube (2), mounting ring (8), stopper (7), inlet tube (2) inner wall, pump body (1) one end is kept away from and is equipped with square groove (202), square groove (202) and annular (201) intercommunication, collar (6) are kept away from collar (8) one end fixed mounting and are had stopper (7), stopper (7) one side and buffer board (4) butt, stopper (7) opposite side and annular (201) butt, inlet tube (2) axle side is equipped with water conservancy diversion hole (203), sleeve (6) axle side correspondence is equipped with intercommunicating pore (601).

2. An anti-clogging dredge pump according to claim 1, characterized in that: the communicating holes (601) are provided with a plurality of groups, the communicating holes (601) are distributed annularly around the side wall of the sleeve (6), the diameter of the communicating holes (601) is equal to that of the diversion holes (203), the number of the communicating holes (601) is equal to that of the diversion holes (203), and the diversion holes (203) are opposite to the communicating holes (601) up and down.

3. An anti-clogging dredge pump according to claim 1, characterized in that: main filter screen (9) are sunken to being close to pump body (1) one side, the cross sectional shape of main filter screen (9) is trapezoidal.

4. An anti-clogging dredge pump according to claim 1, characterized in that: the filter screen is characterized in that connecting plates (10) are fixedly connected to two sides of the main filter screen (9), and the connecting plates (10) are fixedly connected with the mounting ring (8) through fastening bolts (11).

5. An anti-clogging dredge pump according to claim 1, characterized in that: mounting ring (8) go up sliding connection has locating lever (12), locating lever (12) one end and square groove (202) sliding connection, locating lever (12) other end fixed mounting has arm-tie (13), extension spring (14) have been cup jointed in the locating lever (12) outside, extension spring (14) one end and mounting ring (8) fixed connection, extension spring (14) other end and arm-tie (13) fixed connection.

6. An anti-clogging dredge pump according to claim 1, characterized in that: the utility model discloses a filter screen, including water conservancy diversion hole (203), water conservancy diversion hole (203) upside is equipped with first crown plate (15), water conservancy diversion hole (203) downside is equipped with second crown plate (16), first crown plate (15) and the equal fixed mounting of second crown plate (16) are in the inlet tube (2) outside, fixed mounting has time filter screen (17) between first crown plate (15) and second crown plate (16), time filter screen (17) slope sets up.

7. An anti-clogging dredge pump according to claim 6, characterized in that: the internal diameter of first crown plate (15) equals with the internal diameter of second crown plate (16), the external diameter of first crown plate (15) is greater than the external diameter of second crown plate (16), pump body (1) one side fixed connection is kept away from with first crown plate (15) to inferior filter screen (17) one end, pump body (1) one side fixed connection is kept away from with second crown plate (16) to inferior filter screen (17) other end.

8. An anti-clogging dredge pump according to claim 1, characterized in that: buffer board (4) are the annular plate, the internal diameter of buffer board (4) is less than the internal diameter of sleeve (6), the external diameter of buffer board (4) is less than the diameter of annular (201).