Centrifugal slurry pump with pumping cutting device

Abstract

The application discloses a centrifugal slurry pump with a pumping cutting device, which comprises a base and a pump body, the pump body is fixedly connected to the base, a fixed block is fixedly connected to the upper surface of the base, and a cutting mechanism is arranged in the fixed block; the cutting mechanism comprises a treatment cavity and two driving cavities, the treatment cavity is arranged in the fixed block, the first pipe and the second pipe are fixedly connected to the fixed block in a penetrating mode, the first pipe and the second pipe both extend into the treatment cavity in a penetrating mode, the second pipe is fixedly connected to the pump body, a plurality of sliding sleeves are sealingly and slidingly connected to the fixed block in a penetrating mode, one end of the sliding sleeve extends into the treatment cavity in a penetrating mode, the other end of the sliding sleeve extends into the corresponding driving cavity in a penetrating mode, and a sliding column is sealingly and slidingly connected to the sliding sleeve. The slurry pump can cut and treat impurities in fluid before the fluid enters, so that blockage is avoided, and the impurities with hard texture can be avoided from entering the pump body, so that the blades are prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of slurry pump technology, and more particularly to a centrifugal slurry pump with a pumping and cutting device. Background Technology

[0002] Pumps are common tools used to pump fluids. Centrifugal slurry pumps are one type of pump. A centrifugal slurry pump is a machine that uses centrifugal force to increase the energy of a solid-liquid mixture. It converts electrical energy into the kinetic and potential energy of the medium. Under centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the impeller at high speed and entering the volute casing. In the volute casing, the liquid decelerates due to the gradual expansion of the flow channel, converting some of its kinetic energy into static pressure energy. Finally, it flows into the discharge pipe at a higher pressure. It is mainly suitable for industries such as mining, power plants, dredging, metallurgy, chemical industry, building materials, and petroleum. The characteristic of slurry pumps is that they can pump solid-liquid mixtures, and their main function is also to pump solid-liquid mixtures. Ordinary water pumps can only pump fluids, which explains the application of slurry pumps in construction and mining.

[0003] In the existing technology, existing slurry pumps generally do not have a pre-treatment step during use. Due to the characteristics of pumping solid-liquid mixtures, when a large volume of material is mixed in the liquid, it will clog the slurry pump, thus affecting its use. If there are hard materials in the pumping process, the pump blades are easily damaged, causing unnecessary economic losses. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a centrifugal slurry pump with a pumping and cutting device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A centrifugal slurry pump with a pumping and cutting device includes a base and a pump body. The pump body is fixedly connected to the base, and a fixing block is fixedly connected to the upper surface of the base. A cutting mechanism is provided inside the fixing block.

[0007] The cutting mechanism includes a processing chamber and two driving chambers. The processing chamber is located within a fixed block, through which a first tube and a second tube are fixedly connected. Both the first and second tubes extend into the processing chamber. The second tube is fixedly connected to a pump body. The fixed block is slidably connected to a plurality of sliding sleeves, one end of which extends into the processing chamber and the other end into the corresponding driving chamber. Each sliding sleeve is slidably fitted with a sliding column. One end of the sliding column, located within the processing chamber, is fixedly connected to a sliding plate. Several cutting blades are fixedly connected to the top and bottom walls of the sliding plate, as well as to the top and bottom walls of the processing chamber. A spring is fixedly connected between the sliding sleeve and the sliding column. A rotating shaft is rotatably connected between two opposing inner sidewalls of the driving chamber via a bearing. A first gear is fixedly connected to the rotating shaft. A rack is fixedly connected to the opposite sidewall of each of the two sliding sleeves, and the rack meshes with the corresponding first gear.

[0008] Furthermore, the cutting mechanism also includes two drive shafts. The drive shafts are rotatably connected to the fixed block through bearings. One end of the drive shaft extends through to the outside of the fixed block, and the other end extends through to the corresponding drive cavity and is fixedly connected to a rotating block. The drive shaft is fixedly connected to a second gear, and the two second gears mesh. One of the drive shafts is fixedly connected to a first pulley, and the shaft of the pump body is fixedly connected to a second pulley. The first pulley and the second pulley cooperate with a synchronous belt. A rotating rod is fixedly connected to the side wall of the rotating block. Two fixed plates are fixedly connected to the side walls of the two sliding sleeves on opposite sides. A fixed rod is fixedly connected between the two corresponding fixed plates. The fixed rod and the corresponding rotating rod are rotatably connected to a connecting block through bearings.

[0009] Furthermore, the fixed block is equipped with multiple sets of sensing mechanisms, each sensing mechanism including a cavity and a sensing chamber. The sensing chamber and the cavity are formed within the fixed block. A third pipe is fixedly connected through the side wall of the sliding sleeve, and a fourth pipe is fixedly connected through the fixed block. The fourth pipe connects the driving chamber to the corresponding cavity. A flexible hose is fixedly connected between the third pipe and the fourth pipe. A pressure relief valve is installed inside the third pipe. A sensing plate is slidably connected within the cavity. Both the cavity and the sliding sleeve are filled with hydraulic oil. A conductive block is slidably connected within the sensing chamber. An insulating rod is fixedly connected between the conductive block and the corresponding sensing plate. The insulating rod is slidably connected through the fixed block. Two conductive frames are fixedly connected to the inner side wall of the sensing chamber.

[0010] Furthermore, a control mechanism is provided inside the fixed block. The control mechanism includes a control cavity, which is opened inside the fixed block. An electric push rod is fixedly connected to the bottom wall of the control cavity. The electric push rod, the conductive block, and the conductive frame are electrically connected by wires. A switch is fixedly connected to the top wall of the control cavity. A buzzer is fixedly connected to the top wall of the fixed block. The switch, the buzzer, and the pump body are connected by a PLC circuit.

[0011] Furthermore, the fixing block has multiple through holes, which connect the corresponding cavities to the outside.

[0012] Furthermore, the diameter of the first pulley is six times that of the second pulley.

[0013] Furthermore, a protective cover is fixedly connected to the upper surface of the base.

[0014] The present invention has the following advantages:

[0015] 1. Before the fluid enters the pump body, it first passes through the treatment chamber of the fixed block, while the sliding plate reciprocates in the treatment chamber. Through the cutter on the side wall of the sliding plate and the cutter on the inner wall of the treatment chamber, large impurities are cut into small pieces, thereby preventing large impurities from clogging the slurry pump and affecting normal use.

[0016] 2. By setting multiple sliding plates, and the movement directions of two adjacent sliding plates are opposite, that is, when the fluid passes through each sliding plate, there is a set of sliding plates moving towards or away from each other to cut, thereby ensuring that impurities in the fluid can be cut and avoiding missed cutting due to only setting one cutting mechanism.

[0017] 3. The cutting mechanism is driven by the shaft of the pump body, so that the cutting frequency of the cutting mechanism is related to the speed of the pumped fluid. The faster the pumped fluid speed, the higher the cutting frequency. Conversely, the slower the pumped fluid speed, the lower the cutting frequency, so that the cutting frequency of the cutting mechanism can be automatically adjusted with the pumping speed.

[0018] 4. During the process of cutting impurities, if there are hard materials, when they are located between the two sliding plates or between the sliding plates and the inner wall of the processing chamber, the movement of the sliding plates will clamp them, thereby preventing the hard materials from entering the pump body and damaging the pump blades, causing unnecessary economic losses.

[0019] 5. After clamping a harder material, the sliding sleeve continues to move, causing the sliding column to slide. This, in turn, causes the sensing plate to slide via hydraulic oil. The sensing plate then drives the conductive block to slide via the insulating rod, making contact with the conductive frame. At this point, the electric push rod is energized and extends, triggering the switch and stopping the pump. Simultaneously, a buzzer sounds an alarm, alerting staff that a harder material has been mixed into the fluid, prompting them to take immediate action. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a centrifugal slurry pump with a pumping and cutting device proposed in this invention;

[0021] Figure 2 This is a schematic diagram of the centrifugal slurry pump with a pumping and cutting device proposed in this invention from another perspective.

[0022] Figure 3 This is a schematic diagram of the internal structure of the fixed block in a centrifugal slurry pump with a pumping and cutting device proposed in this invention.

[0023] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0024] Figure 5 This is a schematic diagram of the structure of the fixed block in a centrifugal slurry pump with a pumping and cutting device proposed in this invention, from another cross-section.

[0025] Figure 6 for Figure 5 Enlarged view of point B in the image;

[0026] Figure 7 This is a schematic diagram of the internal structure of the control chamber in a centrifugal slurry pump with a pumping and cutting device proposed in this invention.

[0027] In the diagram: 1. Base, 2. Pump body, 3. Fixing block, 4. First pipe, 5. Second pipe, 6. Processing chamber, 7. Drive chamber, 8. Sliding sleeve, 9. Sliding column, 10. Spring, 11. Sliding plate, 12. Cutter, 13. Rotating shaft, 14. First gear, 15. Rack, 16. Drive shaft, 17. Second gear, 18. First pulley, 19. Second pulley, 20. Synchronous belt, 21. Protective cover, 22. Rotating block, 23. Rotating rod, 24. Fixing plate, 25. Fixing rod, 26. Connecting block, 27. Third pipe, 28. Pressure relief valve, 29. Cavity, 30. Fourth pipe, 31. Flexible hose, 32. Sensing plate, 33. Through hole, 34. Sensing chamber, 35. Insulating rod, 36. Conductive block, 37. Conductive frame, 39. Control chamber, 40. Electric push rod, 41. Switch, 42. Buzzer. Detailed Implementation

[0028] Reference Figures 1-7 A centrifugal slurry pump with a pumping and cutting device includes a base 1 and a pump body 2. The pump body 2 is fixedly connected to the base 1. A fixing block 3 is fixedly connected to the upper surface of the base 1. A cutting mechanism is provided inside the fixing block 3.

[0029] The cutting mechanism includes a processing chamber 6 and two driving chambers 7. The processing chamber 6 is located within a fixed block 3. A first pipe 4 and a second pipe 5 are fixedly connected to the fixed block 3. Both the first pipe 4 and the second pipe 5 extend into the processing chamber 6. The second pipe 5 is fixedly connected to the pump body 2 and to the input end of the pump body 2. A plurality of sliding sleeves 8 are slidably connected to the fixed block 3. One end of each sliding sleeve 8 extends into the processing chamber 6, and the other end extends into the corresponding driving chamber 7. A sliding column 9 is slidably fitted onto each sliding sleeve 8. A sliding plate 11 is fixedly connected to one end of the sliding column 9 located in the processing chamber 6. A plurality of cutters 12 are fixedly connected to the top and bottom walls of the sliding plate 11 and to the top and bottom walls of the processing chamber 6. A spring 10 is fixedly connected between the sliding sleeve 8 and the sliding column 9. A rotating shaft 13 is rotatably connected between the two opposing inner walls of the driving chamber 7 via a bearing. A first pipe 4 and a second pipe 5 are fixedly connected to the rotating shaft 13. A gear 14 and two sliding sleeves 8 are fixedly connected to the side walls on opposite sides with racks 15. The racks 15 mesh with the corresponding first gear 14. Through the movement of the sliding plate 11, in conjunction with the cutter 12, impurities in the fluid are cut to prevent the fluid from directly entering the pump body 2. Large impurities can cause blockage in the pump body 2. Through the meshing of the rack 15 with the first gear 14, the adjacent sliding sleeve 8 moves in the opposite direction, so that the movements of the two adjacent sliding sleeves 8 are always opposite. In turn, the movements of the two adjacent sliding plates 11 are always opposite. That is, when one set of sliding plates 11 cuts the material between them, the adjacent set of sliding plates 11 cuts the material between the sliding plate 11 and the inner wall of the processing chamber 6. This ensures that impurities at all positions in the processing chamber 6 can be cut, avoiding the situation where there is a missed cut due to only one set of cutting mechanism.

[0030] The cutting mechanism also includes two drive shafts 16. The drive shafts 16 are rotatably connected to the fixed block 3 through bearings. One end of the drive shaft 16 extends through to the outside of the fixed block 3, and the other end extends through to the corresponding drive cavity 7 and is fixedly connected to a rotating block 22. The drive shaft 16 is fixedly connected to a second gear 17, and the two second gears 17 mesh. One drive shaft 16 is fixedly connected to a first pulley 18, and the shaft of the pump body 2 is fixedly connected to a second pulley 19. The first pulley 18 and the second pulley 19 cooperate with a synchronous belt 20. A rotating rod 23 is fixedly connected to the side wall of the rotating block 22. Two fixed plates 24 are fixedly connected to the side walls of the two sliding sleeves 8 on opposite sides. A fixed rod 25 is fixedly connected between the two corresponding fixed plates 24. The fixed rod 25 and the corresponding rotating rod 23 are rotatably connected to a connecting block 26 through bearings. The shaft of the pump body 2 drives the second pulley 19 to rotate. 9 drives the first pulley 18 to rotate via the synchronous belt 20, which in turn drives the rotating shaft 13 to rotate. Then, through the meshing of the two second gears 17, the two rotating shafts 13 rotate synchronously in opposite directions, which in turn causes the rotating block 22 to rotate. The rotation of the rotating block 22 drives the sliding sleeve 8 to reciprocate through the connecting block 26. The two opposing sliding sleeves 8 move in opposite directions, which causes the sliding sleeves 8 to drive the sliding plates 11 to move towards each other and then away from each other through the sliding column 9. This reciprocating motion cuts impurities in the fluid through the cutters 12 on the side walls of the two sliding plates 11 and the top and bottom walls of the processing chamber 6. The cutting mechanism is driven by the shaft of the pump body 2, so that the cutting frequency of the cutting mechanism is related to the speed of the pumped fluid. The faster the pumped fluid speed, the higher the cutting frequency. Conversely, the slower the pumped fluid speed, the lower the cutting frequency. This allows the cutting frequency of the cutting mechanism to be automatically adjusted according to the pumping speed.

[0031] Multiple sensing mechanisms are installed within the fixed block 3. Each sensing mechanism includes a cavity 29 and a sensing cavity 34, both located within the fixed block 3. A third pipe 27 is fixedly connected through the side wall of the sliding sleeve 8, and a fourth pipe 30 is fixedly connected through the fixed block 3. The fourth pipe 30 connects the drive cavity 7 to the corresponding cavity 29. A flexible hose 31 is fixedly connected between the third pipe 27 and the fourth pipe 30. A pressure relief valve 28 is installed within the third pipe 27. A sensing plate 32 is slidably connected within the cavity 29. Both the cavity 29 and the sliding sleeve 8 are filled with hydraulic oil. A conductive block 36 is slidably connected within the sensing cavity 34. An insulating rod 35 is fixedly connected to the corresponding sensing plate 32. The insulating rod 35 is slidably connected to the fixed block 3. Two conductive frames 37 are fixedly connected to the inner wall of the sensing cavity 34. When the conductive block 36 contacts the conductive frame 37, the electric push rod 40 can be energized and extended. When the sliding plate 11 cuts during the reciprocating motion, when it encounters a hard impurity, the impurity between the two sliding plates 11 or between the sliding plate 11 and the inner wall of the processing cavity 6 will be clamped by the sliding plate 11. At this time, the hard impurity cannot continue to advance, thereby preventing it from entering the pump body 2 and damaging the blades inside the pump body 2.

[0032] A control mechanism is installed inside the fixed block 3. The control mechanism includes a control cavity 39, which is located inside the fixed block 3. An electric push rod 40 is fixedly connected to the bottom wall of the control cavity 39. The electric push rod 40, the conductive block 36, and the conductive frame 37 are electrically connected by wires. A switch 41 is fixedly connected to the top wall of the control cavity 39, and a buzzer 42 is fixedly connected to the top wall of the fixed block 3. The switch 41, the buzzer 42, and the pump body 2 are connected by a PLC circuit. The PLC circuit enables the buzzer 42 to be energized and the pump body 2 to be de-energized when the switch 41 is pressed. The PLC circuit is existing technology and will not be described in detail here. When a hard impurity is clamped, the sliding plate 11 will continue to move under the drive. However, when the sliding plate 11 is blocked by the impurity and cannot move, the sliding sleeve 8 continues to move. At this time, the sliding column 9 will slide inside the sliding sleeve 8, pumping the hydraulic oil in the sliding sleeve 8 into the cavity 29 through the third pipe 27, the hose 31, and the fourth pipe 30, or drawing the hydraulic oil in the cavity 29 into the sliding sleeve 8. In both cases, the sensing plate 32 will slide. The sliding of the sensing plate 32 will drive the conductive block 36 to move through the insulating rod 35. No matter which direction the conductive block 36 moves, it will contact the conductive frame 37, which will energize the electric push rod 40. After the electric push rod 40 is energized, it will extend and trigger the switch 41. After the switch 41 is pressed, the pump body 2 will stop, and the buzzer 42 will be energized to sound an alarm. When the staff hears the alarm sound of the buzzer 42, it means that there is a hard substance in the fluid, which needs to be cleaned in time, and it is necessary to check whether there is still a hard substance in the fluid.

[0033] The fixing block 3 has multiple through holes 33, which connect the corresponding cavity 29 to the outside. The through holes 33 ensure that the side of the sensing plate 32 near the insulating rod 35 remains connected to the outside, thereby ensuring that the sensing plate 32 with the sealed sliding connection can slide freely up and down.

[0034] The diameter of the first pulley 18 is six times that of the second pulley 19. The larger diameter of the first pulley 18 driven by the smaller diameter second pulley 19 can generate a greater cutting force, ensuring that the impurities are shredded.

[0035] A protective cover 21 is fixedly connected to the upper surface of the base 1. The protective cover 21 prevents the first pulley 18, the second pulley 19, and the second gear 17 from being directly exposed to the outside world, thus avoiding accidental injury to the staff and improving the safety of the device.

[0036] In this invention, during use, the pump body 2 is turned on, and the shaft of the pump body 2 rotates to start pumping fluid. The fluid is drawn through the first pipe 4 and passes through the processing chamber 6. At this time, the shaft of the pump body 2 drives the second pulley 19 to rotate. The second pulley 19 drives the first pulley 18 to rotate through the synchronous belt 20, thereby causing the first pulley 18 to drive the rotating shaft 13 to rotate. Then, through the meshing of the two second gears 17, the two rotating shafts 13 rotate synchronously in opposite directions, thereby causing the rotating block 22 to rotate.

[0037] The rotating block 22 rotates and drives the sliding sleeve 8 to reciprocate through the connecting block 26. The two opposing sliding sleeves 8 move in opposite directions, so that the sliding sleeve 8 drives the sliding plate 11 to move towards each other and then away from each other through the sliding column 9. This reciprocating motion cuts the impurities in the fluid through the cutters 12 on the side walls of the two sliding plates 11 and the top and bottom walls of the processing chamber 6.

[0038] During the movement of the sliding sleeve 8 close to the rotating block 22, the meshing of the rack 15 and the first gear 14 causes the adjacent sliding sleeve 8 to move in the opposite direction. This ensures that the movements of the two adjacent sliding sleeves 8 are always opposite, and consequently, the movements of the two adjacent sliding plates 11 are always opposite. That is, when one set of sliding plates 11 cuts the material between them, the adjacent set of sliding plates 11 cuts the material between the sliding plate 11 and the inner wall of the processing cavity 6, thereby ensuring that impurities at all positions in the processing cavity 6 can be cut.

[0039] When the sliding plate 11 is cutting during reciprocating motion, if it encounters a hard impurity, the two sliding plates 11 or the impurity between the sliding plate 11 and the inner wall of the processing chamber 6 will be clamped by the sliding plate 11. At this time, the hard impurity cannot continue to move forward, thus preventing it from entering the pump body 2 and damaging the blades inside the pump body 2.

[0040] Meanwhile, after being clamped, the sliding plate 11 continues to move under the drive. At this time, the sliding plate 11 is blocked by the impurities and cannot move, but the sliding sleeve 8 continues to move. At this time, the sliding column 9 will slide inside the sliding sleeve 8. The hydraulic oil in the sliding sleeve 8 is pumped into the cavity 29 through the third pipe 27, the hose 31, and the fourth pipe 30, or the hydraulic oil in the cavity 29 is drawn into the sliding sleeve 8. In both cases, the sensing plate 32 will slide. The sliding of the sensing plate 32 drives the conductive block 36 to move through the insulating rod 35. No matter which direction the conductive block 36 moves, it will contact the conductive frame 37, so that the electric push rod 40 is energized. After the electric push rod 40 is energized, it will extend and trigger the switch 41. After the switch 41 is pressed, the pump body 2 stops, and the buzzer 42 is energized to sound an alarm. When the staff hears the alarm sound of the buzzer 42, it means that there are hard substances in the fluid. It needs to be cleaned in time, and it should be checked whether there are still hard substances in the fluid.

Claims

1. A centrifugal slurry pump with a pumping and cutting device, comprising a base (1) and a pump body (2), wherein the pump body (2) is fixedly connected to the base (1), characterized in that, A fixing block (3) is fixedly connected to the upper surface of the base (1), and a cutting mechanism is provided inside the fixing block (3); The cutting mechanism includes a processing chamber (6) and two driving chambers (7). The processing chamber (6) is located within a fixed block (3). A first pipe (4) and a second pipe (5) are fixedly connected through the fixed block (3). Both the first pipe (4) and the second pipe (5) extend into the processing chamber (6). The second pipe (5) is fixedly connected to the pump body (2). The fixed block (3) is slidably connected with multiple sliding sleeves (8). One end of each sliding sleeve (8) extends into the processing chamber (6), and the other end extends into the corresponding driving chamber (7). Each sliding sleeve (8) is slidably fitted with a sliding column (9). A sliding plate (11) is fixedly connected to one end of the sliding column (9) located in the processing cavity (6). Several cutters (12) are fixedly connected to the top and bottom walls of the sliding plate (11) and the top and bottom walls of the processing cavity (6). A spring (10) is fixedly connected between the sliding sleeve (8) and the sliding column (9). A rotating shaft (13) is rotatably connected between the two opposite inner side walls of the driving cavity (7) through a bearing. A first gear (14) is fixedly connected through the rotating shaft (13). A rack (15) is fixedly connected to the side wall of the two opposite sides of the sliding sleeves (8). The rack (15) meshes with the corresponding first gear (14).

2. A centrifugal slurry pump with a pumping and cutting device according to claim 1, characterized in that, The cutting mechanism also includes two drive shafts (16), which are rotatably connected to the fixed block (3) through bearings. One end of the drive shaft (16) extends through to the outside of the fixed block (3), and the other end extends through to the corresponding drive cavity (7) and is fixedly connected to a rotating block (22). A second gear (17) is fixedly connected through the drive shaft (16), and the two second gears (17) mesh. One of the drive shafts (16) is fixedly connected through to a first pulley (18). The pump body (2) The shaft is fixedly connected to the second pulley (19). The first pulley (18) and the second pulley (19) are connected to a synchronous belt (20). The side wall of the rotating block (22) is fixedly connected to a rotating rod (23). The side walls of the two sliding sleeves (8) on opposite sides are fixedly connected to two fixing plates (24). The two fixing plates (24) are fixedly connected to a fixing rod (25). The fixing rod (25) and the corresponding rotating rod (23) are connected to a connecting block (26) through a bearing.

3. A centrifugal slurry pump with a pumping and cutting device according to claim 2, characterized in that, Multiple sensing mechanisms are provided inside the fixed block (3). Each sensing mechanism includes a cavity (29) and a sensing cavity (34). The sensing cavity (34) and the cavity (29) are located inside the fixed block (3). A third tube (27) is fixedly connected through the side wall of the sliding sleeve (8). A fourth tube (30) is fixedly connected through the fixed block (3). The fourth tube (30) connects the driving cavity (7) to the corresponding cavity (29). A flexible hose (31) is fixedly connected between the third tube (27) and the fourth tube (30). The third tube (27) is equipped with a pressure relief valve (28), the cavity (29) is sealed and slidably connected with a sensing plate (32), the cavity (29) and the sliding sleeve (8) are both filled with hydraulic oil, the sensing cavity (34) is slidably connected with a conductive block (36), the conductive block (36) and the corresponding sensing plate (32) are fixedly connected with an insulating rod (35), the insulating rod (35) and the fixed block (3) are slidably connected through, and the inner side wall of the sensing cavity (34) is fixedly connected with two conductive frames (37).

4. A centrifugal slurry pump with a pumping and cutting device according to claim 3, characterized in that, A control mechanism is provided inside the fixed block (3). The control mechanism includes a control cavity (39). The control cavity (39) is opened inside the fixed block (3). An electric push rod (40) is fixedly connected to the bottom wall of the control cavity (39). The electric push rod (40), the conductive block (36), and the conductive frame (37) are electrically connected by wires. A switch (41) is fixedly connected to the top wall of the control cavity (39). A buzzer (42) is fixedly connected to the top wall of the fixed block (3). The switch (41), the buzzer (42), and the pump body (2) are connected by a PLC circuit.

5. A centrifugal slurry pump with a pumping and cutting device according to claim 3, characterized in that, The fixing block (3) has multiple through holes (33), which connect the corresponding cavity (29) to the outside.

6. A centrifugal slurry pump with a pumping and cutting device according to claim 2, characterized in that, The diameter of the first pulley (18) is six times that of the second pulley (19).

7. A centrifugal slurry pump with a pumping and cutting device according to claim 1, characterized in that, A protective cover (21) is fixedly connected to the upper surface of the base (1).

Images