Efficient and energy-saving centrifugal slurry pump

Abstract

The invention discloses an efficient energy-saving centrifugal slurry pump, and relates to the technical field of centrifugal pumps, the efficient energy-saving centrifugal slurry pump comprises a support and a volute, a bearing box is arranged at the upper end of the support, a rotating shaft is rotatably arranged on the bearing box, a driving assembly is further arranged on the support, the volute is installed on the support, a water inlet and a water outlet are formed in the volute, one end of the rotating shaft extends into the volute, and the other end of the rotating shaft extends into the volute. A water storage cavity is formed in the end, located in the volute, of the rotating shaft, a plurality of water spraying grooves are formed in the circumferential wall of the rotating shaft and communicate with the water storage cavity, and the water storage cavity and the water spraying grooves are closer to the water inlet relative to the impeller. Water in the water storage cavity is thrown out of the water spraying groove due to centrifugal force, the water sprayed out of the water spraying groove forms a water curtain, and the axial momentum of particles entering the volute from the water inlet is reduced through the water curtain. The application has the effects of improving the use performance of the equipment, reducing the damage probability of the equipment and reducing the energy consumption.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal pumps, and in particular to a high-efficiency and energy-saving centrifugal slurry pump. Background Art

[0002] A centrifugal slurry pump is a machine that increases the energy of a solid-liquid mixture by using the centrifugal force generated by the rotation of the pump impeller. It converts electrical energy into kinetic energy and potential energy of the medium, thereby achieving the transportation of slurry (such as mud, ore slurry, coal slurry and other mixtures containing solid particles).

[0003] The centrifugal slurry pump is mainly composed of flow-through components such as the pump shaft, impeller, suction chamber (water inlet section), volute (water outlet section), as well as main components such as the bearing box and drive motor. Its main working principle is to drive the impeller to rotate at high speed through the motor, thereby generating centrifugal force. When the impeller rotates, the liquid will flow into the groove between the impellers, and then the liquid is affected by the centrifugal force, and is thrown from the center of the impeller to the surroundings and thrown into the pump casing. In this process, the liquid gains kinetic energy and pressure energy, and then the liquid flows out from the water outlet of the pump casing.

[0004] However, in actual situations, since the slurry generally contains particles, when the particles flow into the grooves between the impellers with the water flow, the particles will hit the impellers. The impellers are prone to deformation or damage under long-term impact, which can easily lead to reduced performance of the equipment or even damage to the equipment. Summary of the Invention

[0005] The purpose of this application is to provide a high-efficiency and energy-saving centrifugal slurry pump that can minimize the deformation or breakage of the impeller, thereby improving the performance of the equipment and reducing the probability of equipment damage.

[0006] The present application provides a high-efficiency and energy-saving centrifugal slurry pump adopts the following technical solution: The support has a bearing box at its upper end, a rotating shaft is rotatably provided on the bearing box, and a driving assembly for driving the rotating shaft is also provided on the support; A volute is mounted on the support, one end of the volute is coaxially provided with a water inlet, and the volute is provided with a water outlet; One end of the rotating shaft away from the driving assembly extends into the volute and is coaxially fixedly connected with an impeller. The impeller is located in the volute. A water storage chamber is provided at one end of the rotating shaft located in the volute. A water spray trough is provided on the peripheral wall of the rotating shaft. Multiple water spray troughs are connected to the water storage chamber. A filter is provided on the side of the water storage chamber close to the water inlet. The water spray trough is closer to the water inlet than the impeller. When the rotating shaft rotates, the water in the water storage chamber is thrown out from the water spray trough due to centrifugal force, and the water sprayed from the water spray trough forms a water curtain, thereby reducing the axial momentum of particles entering the volute from the water inlet.

[0007] Optionally, a plurality of the water spray troughs are evenly spaced around the axis of the rotating shaft, and the width of the water spray troughs is set to be shorter so that the water sprayed from the water spray troughs has a certain pressure and is easy to form a water curtain.

[0008] Optionally, multiple water spray troughs are arranged obliquely in the direction close to the water inlet to further reduce the axial momentum of the liquid entering the volute from the water inlet, thereby avoiding the occurrence of particles in the liquid colliding with the impeller; and increase the centrifugal force of the liquid in the volute, thereby increasing the flow velocity of the liquid when it is sprayed out from the water outlet.

[0009] Optionally, the filter is configured to be hemispherical to avoid particles being adsorbed on the surface of the filter, thereby preventing the filter from being clogged.

[0010] Optionally, the volute includes a first shell and a second shell, the first shell is mounted on the support, the second shell is coaxially arranged with the first shell, and the first shell and the second shell are connected by bolts, the water inlet is located on the second shell, and the water outlet is formed by the first shell and the second shell, and a buffer is provided on the inner circumferential wall of the volute to reduce the impact force of the liquid.

[0011] Optionally, the buffer member includes a buffer pad, which is configured in a strip shape and is mounted on the inner circumferential wall of the volute, and covers a connection gap between the first shell and the second shell.

[0012] Optionally, a positioning member is provided between the buffer pad and the first shell and the second shell, and the positioning member is used to prevent relative sliding between the buffer pad and the first shell and the second shell as much as possible.

[0013] Optionally, the positioning member includes a mounting bar having the same shape as that of the buffer pad, the buffer pad being mounted on the mounting bar, a plurality of positioning columns being provided on the mounting bar, and the first shell and the second shell being both provided with positioning grooves adapted to the plurality of positioning columns.

[0014] Optionally, a heat sink is provided on the driving assembly.

[0015] Optionally, the heat sink is configured as a heat sink fin.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. When the rotating shaft rotates, the water in the water storage chamber will be thrown out from the water spray trough under the action of centrifugal force. Due to the setting of multiple water spray troughs, the water sprayed from the multiple water spray troughs forms a layer of water curtain. The water curtain is located between the water inlet of the volute and the impeller. Therefore, the particles entering the volute from the water inlet will have a slower speed due to the blocking effect of the water curtain, so that the force acting on the impeller will be reduced or cannot touch the impeller, thereby reducing the damage of the particles in the liquid to the impeller, thereby minimizing the deformation or wear of the impeller, ensuring the normal operation of the equipment and extending the service life of the equipment; at the same time, the normal operation of the impeller can ensure that its own mechanical energy is converted into the pressure energy and kinetic energy of the liquid to the maximum extent, thereby improving the energy conversion rate of the equipment and reducing energy consumption, and ensuring the working efficiency of the equipment as much as possible; 2. Due to the rotation of the impeller, the liquid at the center of the impeller will be thrown into the gap between the impeller and the volute under the action of centrifugal force, and the center of the volute is in a low-pressure state, so the liquid can be continuously sucked into the center of the volute from the water inlet. Therefore, the liquid just entering the center of the volute will be subject to the suction parallel to the axis of the rotating shaft and the centrifugal force perpendicular to the axis of the rotating shaft. Therefore, the direction of the comprehensive external force on the liquid and the particles in the liquid is inclined in the direction close to the impeller, and the inclined arrangement of multiple water spray troughs makes the water curtain sprayed from the water spray trough inclined in the direction away from the impeller. Therefore, when the particles in the liquid touch the water curtain, the force exerted by the water curtain on the particles can better offset the momentum of the particles in the direction of movement close to the impeller, thereby further maximizing the It avoids the occurrence of particles hitting the impeller, thereby further reducing the probability of impeller deformation or wear; in addition, when the liquid touches the water curtain, it will also be subjected to the same external force as the particles. Therefore, after being subjected to the external force of the water curtain, the momentum of the liquid and the particles in the liquid in the direction of movement close to the impeller will decrease, while the momentum in the direction away from the impeller axis will increase, that is, the centrifugal force will be further increased. The increase in the centrifugal force of the liquid and particles will increase their own momentum at the water outlet, thereby increasing the flow rate of the liquid at the water outlet. Therefore, the slurry pump can extract more slurry per unit time, thereby improving the working efficiency of the equipment. At the same time, this equipment can increase the flow rate of the liquid at the water outlet without adding an additional driving source, thereby reducing energy consumption to a certain extent. 3. As the centrifugal force on the liquid and particles increases, the pressure and impact on the inner wall of the volute will increase. The provision of the buffer pad can provide a certain degree of protection for the volute, reducing the impact of particles on the inside of the volute, thereby reducing the damage caused by particles to the volute. At the same time, the buffer pad covers the connecting gap between the first shell and the second shell, thereby minimizing the phenomenon of liquid spraying out of the connecting gap between the first shell and the second shell, further ensuring the stable operation of the equipment. The connecting gap between the first shell and the second shell is a place where the connection strength is relatively low. Therefore, by covering the connecting gap between the first shell and the second shell with the buffer pad, the liquid is minimised from impacting the connection between the first shell and the second shell, thereby ensuring the connection stability of the first shell and the second shell to a certain extent. 4. The arrangement of the positioning column on the mounting bar not only further strengthens the connection stability between the first shell and the second shell, but also increases the connection stability between the buffer pad and the volute. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the structure inside the volute in an embodiment of the present application; Figure 3 yes Figure 2 A magnified schematic diagram of point A in the middle; Figure 4 Schematic diagram of the cross-sectional structure of the volute in the embodiment of the present application; Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle; Figure 6 yes Figure 4 The enlarged schematic diagram of point C in the middle; Figure 7 is a spatial force analysis diagram when the particles are located in the volute in this embodiment; In the figure, 1. support; 11. bearing box; 12. rotating shaft; 121. water storage chamber; 122. water spray tank; 2. drive assembly; 3. volute; 31. first shell; 32. second shell; 33. water inlet; 34. water outlet; 35. positioning groove; 4. impeller; 5. filter; 6. buffer; 61. buffer pad; 62. positioning member; 621. mounting strip; 622. positioning column; 7. heat sink. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-7 , further details of this application are given.

[0019] A high-efficiency and energy-saving centrifugal slurry pump, refer to Figure 1 and Figure 2, including a support 1, a bearing box 11 and a volute 3.

[0020] The bearing box 11 in this embodiment is fixedly mounted on the upper end surface of the support 1, and a rotating shaft 12 (combined with the bearing box 11) is provided in the middle part of the bearing box 11 in the horizontal direction. Figure 3 ), the rotating shaft 12 is rotatably connected to the bearing box 11, and one end of the rotating shaft 12 is coaxially fixedly connected to the driving component 2. The driving component 2 in this embodiment is configured as a driving motor, and a heat sink 7 is provided on the upper end surface of the fixed mounting support 1 of the driving motor to ensure the stable operation of the driving motor. In this embodiment, the heat sink 7 is configured as a heat sink fin.

[0021] The volute 3 is fixedly mounted on the end of the bearing box 11 away from the drive motor, and the end of the rotating shaft 12 away from the drive motor extends into the interior of the volute 3. The volute 3 and the rotating shaft 12 are coaxially arranged, and an impeller 4 is coaxially fixedly sleeved on the rotating shaft 12. The impeller 4 is located inside the volute 3. A water inlet 33 is opened at one end of the volute 3, and the water inlet 33 is coaxially arranged with the rotating shaft 12. A water outlet 34 is provided on the side wall of the volute 3.

[0022] Reference Figure 4 、 Figure 5 and Figure 7 A water storage chamber 121 is provided at one end of the rotating shaft 12 located inside the volute 3, and a plurality of water spray grooves 122 are provided on the peripheral wall of the rotating shaft 12. The plurality of water spray grooves 122 are evenly spaced around the axis of the rotating shaft 12 and are all connected to the water storage chamber 121. The plurality of water spray grooves 122 are all located between the water inlet 33 and the impeller 4, and a filter screen 5 is provided on the side of the water storage chamber 121 close to the water inlet 33.

[0023] When it is necessary to extract slurry, the drive motor is started, and the drive motor drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the impeller 4 to rotate. The rotation of the impeller 4 generates centrifugal force, so that the liquid in the volute 3 moves to the space between the impeller 4 and the peripheral wall of the volute 3, and then when the liquid located on the peripheral wall of the volute 3 moves to the water outlet 34, it is thrown out of the water outlet 34 under the action of centrifugal force, thereby realizing the transportation of the slurry, and because the liquid in the middle part of the volute 3 is all transported to the peripheral wall of the volute 3 under the action of centrifugal force, the space in the middle part of the volute 3 is in a negative pressure state, so that the external liquid enters the space in the middle part of the volute 3 from the water inlet 33 under the action of pressure, and then the liquid in the middle part of the volute 3 moves to the peripheral wall of the volute 3 under the action of centrifugal force, and so on, thereby realizing the continuous transportation of the slurry.

[0024] The liquid is sucked into the volute 3 from the water inlet 33, and the centrifugal pump in this embodiment is used to transport slurry. Therefore, the liquid contains many solid particles. When these particles enter the interior of the volute 3 as the liquid, they also have momentum in a direction parallel to the axis of the rotating shaft 12. Therefore, these particles will collide with the impeller 4 in the volute 3. Over a long period of time, the impeller 4 is easily deformed or worn by the impact, thereby affecting the operation of the equipment.

[0025] Continue to refer to Figure 4 、 Figure 5 and Figure 7 In this embodiment, a water storage chamber 121 is provided at one end of the rotating shaft 12 located in the volute 3, and a plurality of water spraying grooves 122 are provided on the peripheral wall of the rotating shaft 12. When the liquid enters the middle part of the volute 3 from the water inlet 33, part of the liquid will enter the water storage chamber 121. In order to prevent solid particles from entering the water storage chamber 121 as much as possible, a filter screen 5 is provided at one end of the water storage chamber 121 close to the water inlet 33. Since the water storage chamber 121 is also arranged in the rotating shaft 12, when the rotating shaft 12 rotates, the liquid in the water storage chamber 121 is also thrown out from the plurality of water spraying grooves 122 due to centrifugal force. The movement trajectory of the water sprayed from the water spraying grooves 122 is roughly perpendicular to the axis of the rotating shaft 12, that is, the water sprayed from the water spraying grooves 122 is sprayed from the middle part of the volute 3 to the peripheral wall of the volute 3, and the water sprayed from the plurality of water spraying grooves 122 forms a water curtain of a certain size, and Since the water spray trough 122 is located between the water inlet 33 and the impeller 4, the formed water curtain is also between the impeller 4 and the water inlet 33. The particles enter the volute 3 from the water inlet 33, and when these particles touch the water curtain, the water curtain will have a certain blocking effect on these particles, and the momentum of the particles parallel to the axis of the rotating shaft 12 will be reduced, so that the force of the particles on the impeller 4 will be reduced or will not be able to touch the impeller 4, thereby reducing the damage of the particles in the liquid to the impeller 4, and thus avoiding the deformation or wear of the impeller 4 as much as possible, ensuring the normal operation of the equipment and extending the service life of the equipment; at the same time, the normal operation of the impeller 4 can ensure that its own mechanical energy is converted into the pressure energy and kinetic energy of the liquid to the maximum extent, thereby improving the energy conversion rate of the equipment and reducing energy consumption, and ensuring the working efficiency of the equipment as much as possible.

[0026] In addition, the liquid and particles entering the volute 3 from the water inlet 33 are not only subject to the suction force parallel to the axial direction of the rotating shaft 12, but also subject to the centrifugal force generated by the rotation of the impeller 4 (the direction is perpendicular to the axial direction of the rotating shaft 12). Therefore, the movement trajectory of the liquid and particles in the liquid entering the volute 3 from the water inlet 33 is arranged in a direction inclined away from the axis of the rotating shaft 12, and the liquid sprayed from the water trough 122 also has a certain momentum. Since the water sprayed from the water trough 122 is subject to centrifugal force (the direction is approximately perpendicular to the axial direction of the rotating shaft 12), when the liquid and particles in the liquid entering the shell from the water inlet 33 touch the water curtain, they will be subjected to the water curtain exerting a vertical rotation on them. The impact force in the axial direction of the dynamic shaft 12 can not only reduce the axial (rotating shaft 12) momentum of the liquid and the particles in the liquid, but also increase the centrifugal force of the liquid and the particles in the liquid. Since the centrifugal force of the liquid and the particles in the liquid (the direction of the centrifugal force is from the center of the volute 3 to the edge of the volute 3) increases, the liquid and the particles have great momentum at the water outlet 34, thereby increasing the flow rate of the liquid at the water outlet 34. Therefore, the slurry pump can extract more slurry per unit time, thereby improving the working efficiency of the equipment. At the same time, the equipment can increase the flow rate of the liquid out of the water outlet 34 without adding an additional driving source, thereby reducing energy consumption to a certain extent.

[0027] In summary, the water curtain in this embodiment can not only reduce the axial (rotation axis 12) momentum of the liquid and the particles in the liquid, thereby playing a certain protective role on the impeller 4; it can also increase the centrifugal force of the liquid and the particles in the liquid in the volute 3, thereby increasing the flow velocity of the liquid and the particles in the liquid at the water outlet 34, thereby improving the working efficiency of the equipment and reducing the energy consumption of the equipment.

[0028] In order to facilitate the formation of the water curtain, the width of the water spray trough 122 in this embodiment is set to be shorter. On the one hand, the size of the water spray trough 122 with a shorter width is smaller than that of the water storage chamber 121. Therefore, the pressure at the connection point between the water spray trough 122 and the water storage chamber 121 is greater, so that the water sprayed from the water spray trough 122 has a stronger momentum. Therefore, the water curtain is not easily dispersed by other liquids in the volute 3, thereby ensuring the stability of the water curtain and strengthening the protection of the impeller 4. On the other hand, the water sprayed from the water spray trough 122 has a stronger momentum, which acts on The impact force of the liquid and the particles in the liquid entering the volute 3 from the water inlet 33 is greater, thereby further reducing the axial momentum of the particles as much as possible, and further avoiding the probability of the particles causing damage to the impeller 4 as much as possible; at the same time, the greater impact force can further increase the centrifugal force of the liquid and the particles in the liquid entering the volute 3 from the water inlet 33, so that the liquid and the particles have great momentum at the water outlet 34, thereby increasing the flow rate of the liquid at the water outlet 34, and further improving the working efficiency of the equipment and reducing energy consumption.

[0029] Among them, in order to further strengthen the protection of the impeller 4, the multiple water spray troughs 122 in this embodiment are arranged obliquely along the direction close to the water inlet 33, and the inclination angle is roughly perpendicular to the movement trajectory of the particles. Therefore, the water curtain formed is also roughly perpendicular to the movement trajectory of the particles. Similarly, the impact force of the water curtain on the particles is also roughly perpendicular to the movement trajectory of the particles. Therefore, the axial momentum of the liquid entering the volute 3 from the water inlet 33 and the particles in the liquid is consumed more by the water curtain. Therefore, the probability of particles in the liquid hitting the impeller 4 is smaller, and the deformation or wear of the impeller 4 is further avoided as a whole, thereby ensuring the normal operation of the equipment and extending the service life of the equipment.

[0030] Reference Figure 2 and Figure 3 In order to avoid the filter screen 5 being clogged by solid particles as much as possible, the filter screen 5 in this embodiment is set to a hemispherical shape.

[0031] When impurities or particles in the liquid adhere to the surface of the hemispherical filter screen 5, since the surface of the hemispherical filter screen 5 is streamlined, when the liquid enters the volute 3 from the water inlet 33, the liquid will flush the surface of the filter screen 5. Since the surface of the filter screen 5 is streamlined, the liquid is more likely to flow along the surface of the hemispherical filter screen 5. When the liquid flows through the surface of the filter screen 5, the liquid will wash away the impurities and particles adhered to the surface of the filter screen 5, thereby avoiding the occurrence of impurities or particles adhering to the surface of the filter screen 5 as much as possible.

[0032] Reference Figure 4 and Figure 6The volute 3 in this embodiment includes a first shell 31 and a second shell 32. The first shell 31 is fixedly mounted on the bearing box 11. The second shell 32 is coaxially arranged with the first shell 31, and the first shell 31 and the second shell 32 are connected by bolts. The water inlet 33 is coaxially located on the second shell 32, and the water outlet 34 is formed by the first shell 31 and the second shell 32. A buffer 6 for reducing the impact force of the liquid is provided on the inner circumferential wall of the volute 3. The buffer 6 in this embodiment includes a buffer pad 61. The buffer pad 61 in this embodiment has a certain elasticity, and the buffer pad 61 in this embodiment covers the connection gap between the first shell 31 and the second shell 32.

[0033] Since the liquid in the volute 3 and the particles in the liquid will move in the direction close to the peripheral wall of the volute 3 under the action of centrifugal force, the liquid and the particles in the liquid will produce a strong impact force on the inner peripheral wall of the volute 3. Under long-term action, the inner peripheral wall of the volute 3 will be seriously damaged or even ruptured. Therefore, by setting the buffer pad 61, the impact force of the liquid and the particles in the liquid on the inner peripheral wall of the volute 3 can be reduced, thereby reducing the probability of damage to the volute 3; in addition, since the connection gap between the first shell 31 and the second shell 32 is generally also located on the peripheral wall of the volute 3, long-term impact on the inner peripheral wall of the volute 3 will also easily cause the first shell 31 and the second shell 32 to split, and the buffer pad 61 in this embodiment also covers the connection gap between the first shell 31 and the second shell 32, which not only plays a certain protective role on the volute 3, but also can play a certain reinforcing role in the connection stability of the first shell 31 and the second shell 32.

[0034] The buffer member 6 in this embodiment further includes a positioning member 62 . The positioning member 62 in this embodiment includes a mounting bar 621 and a positioning column 622 .

[0035] The mounting strip 621 in this embodiment has a certain degree of flexibility. The shape of the mounting strip 621 is the same as that of the buffer pad 61. The buffer pad 61 is fixedly mounted on the mounting strip 621. A plurality of groups of positioning posts 622 are provided on the mounting strip 621. Each group includes two positioning posts 622. The two positioning posts 622 in each group are respectively arranged on the first shell 31 and the second shell 32. The first shell 31 and the second shell 32 are both provided with positioning grooves 35 that are compatible with the plurality of positioning posts 622.

[0036] Since the liquid has great momentum at the water outlet 34, and the centrifugal force generated by the impeller 4 in this embodiment can make the liquid act on the buffer pad 61, the liquid in the volute 3 has extremely strong friction with the buffer pad 61 under the action of the strong centrifugal force. Therefore, when the liquid is discharged from the water outlet 34, the liquid can easily bring the buffer pad 61 out of the water outlet 34. Therefore, through the setting of the positioning column 622 and the positioning groove 35, the movement of the mounting strip 621 and the buffer pad 61 is restricted, so that the positioning column 622 and the positioning groove 35 can not only further enhance the connection stability between the first shell 31 and the second shell 32, but also enhance the connection stability between the buffer pad 61 and the inner wall of the volute 3.

[0037] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A high-efficiency and energy-saving centrifugal slurry pump, characterized in that: include: A support (1) is provided with a bearing box (11) at the upper end, a rotating shaft (12) is rotatably provided on the bearing box (11), and a driving component (2) for driving the rotating shaft (12) to rotate is also provided on the support (1); A volute (3) is mounted on the support (1), a water inlet (33) is coaxially formed at one end of the volute (3), and a water outlet (34) is provided on the volute (3); One end of the rotating shaft (12) away from the driving assembly (2) extends into the volute (3) and is coaxially fixedly connected with an impeller (4), the impeller (4) being located in the volute (3), one end of the rotating shaft (12) located in the volute (3) is provided with a water storage chamber (121), a peripheral wall of the rotating shaft (12) is provided with a water spraying groove (122), a plurality of the water spraying grooves (122) are all in communication with the water storage chamber (121), and the water storage chamber (121) is provided with a plurality of water spraying grooves (122). A filter screen (5) is provided on one side of the volute (121) close to the water inlet (33), and the water spraying groove (122) is closer to the water inlet (33) than the impeller (4). When the rotating shaft (12) rotates, water in the water storage chamber (121) is thrown out from the water spraying groove (122) due to centrifugal force, and the water sprayed from the water spraying groove (122) forms a water curtain, thereby reducing the axial momentum of particles entering the volute (3) from the water inlet (33).

2. The high-efficiency and energy-saving centrifugal slurry pump according to claim 1, characterized in that: The plurality of water spray grooves (122) are evenly spaced around the axis of the rotating shaft (12), and the width of the water spray grooves (122) is set to be relatively short so that water sprayed from the water spray grooves (122) has a certain pressure and is easy to form a water curtain.

3. The high-efficiency and energy-saving centrifugal slurry pump according to claim 1, characterized in that: The plurality of water spray slots (122) are arranged obliquely in a direction close to the water inlet (33) to further reduce the axial momentum of the liquid entering the volute (3) from the water inlet (33), thereby minimizing the occurrence of particles in the liquid colliding with the impeller (4); and increasing the centrifugal force of the liquid in the volute (3), thereby increasing the flow velocity of the liquid when it is sprayed out from the water outlet (34).

4. The high-efficiency and energy-saving centrifugal slurry pump according to claim 1, characterized in that: The filter screen (5) is configured to be hemispherical in shape, so as to avoid particles being adsorbed on the surface of the filter screen (5) as much as possible, thereby preventing the filter screen (5) from being blocked.

5. The high-efficiency and energy-saving centrifugal slurry pump according to claim 1, characterized in that: The volute (3) comprises a first shell (31) and a second shell (32), wherein the first shell (31) is mounted on the support (1), the second shell (32) is coaxially arranged with the first shell (31), and the first shell (31) and the second shell (32) are connected by bolts, the water inlet (33) is located on the second shell (32), and the water outlet (34) is formed by enclosing the first shell (31) and the second shell (32), and a buffer (6) for reducing the impact force of the liquid is arranged on the inner peripheral wall of the volute (3).

6. The high-efficiency and energy-saving centrifugal slurry pump according to claim 5, characterized in that: The buffer member (6) comprises a buffer pad (61), the buffer pad (61) being arranged in a long strip shape, the buffer pad (61) being mounted on the inner peripheral wall of the volute (3), and the buffer pad (61) covering a connection gap between the first shell (31) and the second shell (32).

7. The high-efficiency and energy-saving centrifugal slurry pump according to claim 6, characterized in that: A positioning member (62) is provided between the buffer pad (61) and the first shell (31) and the second shell (32), and the positioning member (62) is used to prevent relative sliding between the buffer pad (61) and the first shell (31) and the second shell (32) as much as possible.

8. The high-efficiency and energy-saving centrifugal slurry pump according to claim 7, characterized in that: The positioning member (62) comprises a mounting strip (621), the mounting strip (621) having the same shape as the buffer pad (61), the buffer pad (61) being mounted on the mounting strip (621), a plurality of positioning posts (622) being arranged on the mounting strip (621), and positioning grooves (35) matching the plurality of positioning posts (622) being arranged on both the first shell (31) and the second shell (32).

9. The high-efficiency and energy-saving centrifugal slurry pump according to claim 1, characterized in that: The drive assembly (2) is provided with a heat sink (7).

10. The high-efficiency and energy-saving centrifugal slurry pump according to claim 9, characterized in that: The heat sink (7) is configured as a heat sink fin.

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