Slurry pump anti-wear pretreatment device

Abstract

This invention discloses an anti-wear pretreatment device for slurry pumps, aiming to solve problems such as easy wear of flow components, easy blockage of flow channels, and uneven stress on blades when slurry pumps transport fluids containing solid particles. The working principle is as follows: the solid-liquid two-phase fluid enters the particle settling chamber through the inlet pipe. Particles of different volumes settle in stages and then enter the corresponding crushing chambers. They are crushed stage by stage by toothed disc blades and wall blades. Unqualified particles are returned for secondary treatment via a screen plate and lifting device. After crushing, the particles are passivated in the passivation chamber by passivation teeth and a stirring device to smooth sharp corners, forming near-spherical particles. The fluid containing fine particles is then thoroughly mixed with the fluid discharged from the passivation chamber in the solid-liquid mixing chamber via a jet oscillation device before being transported to the slurry pump. This invention reduces wear and blockage of slurry pumps, balances blade stress, and extends service life through staged crushing, particle passivation, and uniform solid-liquid mixing. It is applicable to multiple fields such as agricultural irrigation and chemical production.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal pumps, and particularly relates to an anti-wear pretreatment device for slurry pumps. Background Technology

[0002] Slurry pumps have advantages such as a wide performance range and simple structure, and are therefore widely used in agricultural irrigation, chemical production, and mineral transportation. However, the liquids transported by slurry pumps often contain solid particles of varying sizes. Larger particles cause more severe wear and uneven stress on the pump's flow-through components. Sharp angles of these solid particles are also a major factor contributing to wear on these components; the more numerous and sharper the angles, the greater the wear and the shorter the pump's lifespan. Furthermore, large solid particles can cause blockages in the pump's internal flow channels and inlet / outlet pipes, severely affecting the pump's normal operation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an anti-wear pretreatment device for slurry pumps. Installed before the slurry pump inlet pipe, this device pre-treats the fluid entering the pump through the combined operation of various stages. It breaks down solid particles in the fluid, reducing their volume and sharp angles, while also thoroughly mixing the fluid and particles. This balances the force on the pump blades, reduces wear on the pump's flow components, improves the pump's stability, reduces blockages, and extends its service life.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] A wear-resistant pretreatment device for a slurry pump includes, from top to bottom, an inlet pipe, a particle settling chamber, a crushing chamber, a particle mixing chamber, a passivation chamber, a solid-liquid mixing chamber, and a jet oscillation device; wherein, the crushing chamber includes a primary crushing chamber, a secondary crushing chamber, and a tertiary crushing chamber; The inlet pipe is connected to the particle settling chamber. Fluid containing both solid and liquid phases enters the particle settling chamber through the inlet pipe. Particles of different masses enter the primary crushing chamber, secondary crushing chamber, and tertiary crushing chamber, which are connected to the particle settling chamber. Screen plates are installed at the outlets of the primary and secondary crushing chambers. The screen plate after the primary crushing chamber is connected to the primary particle lifting device. The outlet of the primary particle lifting device is connected to the inlet of the secondary crushing chamber. The screen plate after the secondary crushing chamber is connected to the secondary particle lifting device. The outlet of the secondary particle lifting device is connected to the inlet of the tertiary crushing chamber. The outlets of the primary crushing chamber, secondary crushing chamber, and tertiary crushing chamber are all connected to the inlet of the passivation chamber. The inlet of the passivation chamber is connected to the passivation chamber, which has a built-in stirring and mixing device. The bottom of the passivation chamber is connected to the outlet of the passivation chamber, and the outlet of the passivation chamber is directly connected to the solid-liquid mixing chamber. The particle settling chamber is also connected to a pretreatment fluid pipeline. After the fluid containing both solid and liquid phases passes through the particle settling chamber, the fluid containing fine particles passes through the pretreatment fluid pipeline connected to the particle settling chamber. The pretreatment fluid pipeline is connected to the inlet side of the jet oscillation device through the inlet of the jet oscillation device. The outlet side of the jet oscillation device is connected to one side of the solid-liquid mixing chamber. The top of the solid-liquid mixing chamber is connected to the outlet of the passivation chamber, and the other side of the solid-liquid mixing chamber is connected to the outlet pipeline. After the fluid containing high solid volume fraction and the fluid containing low solid volume fraction are fully mixed in the solid-liquid mixing chamber, they are discharged through the outlet pipeline.

[0006] The primary crushing chamber is equipped with a primary shock absorption and stabilization device, a primary toothed disc blade, a primary toothed disc wheel shaft, a primary toothed disc wheel, and primary crushing chamber wall blades. The primary crushing chamber wall blades are evenly distributed on the inner wall of the primary crushing chamber. The primary toothed disc blades are connected to the primary toothed disc wheel and are evenly distributed on the outer surface of the primary toothed disc wheel. The primary toothed disc wheel shaft is connected to the primary toothed disc wheel through four primary shock absorption and stabilization devices with an included angle of 90°. The primary shock absorption and stabilization devices play a role in shock absorption while connecting the drive of the two. Among them, the blade included angle of the first-stage crushing chamber wall blade is 54°, and the height-to-width ratio of the first-stage toothed disc blade is 5:4; The secondary crushing chamber is equipped with a secondary damping and stabilizing device, a secondary toothed disc blade, a secondary toothed disc wheel shaft, a secondary toothed disc wheel, and secondary crushing chamber wall blades. The secondary crushing chamber wall blades are evenly distributed on the inner wall of the secondary crushing chamber. The secondary toothed disc blades are connected to the secondary toothed disc wheel and are evenly distributed on the outer surface of the secondary toothed disc wheel. The secondary toothed disc wheel shaft is connected to the secondary toothed disc wheel through five secondary damping and stabilizing devices with an included angle of 72°. The composition of the secondary damping and stabilizing device is basically the same as that of the primary damping and stabilizing device, the difference being the length of the spring shaft base and the spring toothed disc base. Among them, the blade included angle of the secondary crushing chamber wall blade is 84°, and the height-to-width ratio of the secondary toothed disc blade is 4:3; The three-stage crushing chamber is equipped with a three-stage vibration damping and stabilizing device, a three-stage toothed disc blade, a three-stage toothed disc wheel shaft, a three-stage toothed disc wheel, and three-stage crushing chamber wall blades. The three-stage crushing chamber wall blades are evenly distributed on the inner wall surface of the three-stage crushing chamber. The three-stage toothed disc blades are connected to the three-stage toothed disc wheel and are evenly distributed on the outer surface of the three-stage toothed disc wheel. The three-stage toothed disc wheel shaft is connected to the three-stage toothed disc wheel through six three-stage vibration damping and stabilizing devices with an included angle of 60°. The composition of the three-stage vibration damping and stabilizing device is basically the same as that of the one-stage vibration damping and stabilizing device. The difference is the length of the spring shaft base and the spring toothed disc base. Among them, the blades of the third-stage crushing chamber wall blades are semi-circular blades, and the blades of the third-stage toothed disc are also semi-circular blades. The diameter ratio of the third-stage crushing chamber wall blades to the three-foot toothed disc blades is 1:2.

[0007] Furthermore, the diameter ratio of the primary crushing chamber gear, the secondary crushing chamber gear, and the tertiary crushing chamber gear is 2:3:4; the distance between the toothed disc blades and the crushing chamber wall blades in the primary, secondary, and tertiary crushing chambers decreases sequentially.

[0008] Furthermore, the primary damping and stabilizing device consists of a spring gear base connection hole, a spring, a spring shaft base connection hole, a spring gear base, and a spring shaft base; three springs are arranged at equal intervals, with a spring shaft base connection hole and a spring gear base connection hole on both sides of the springs, respectively. The spring shaft base connection hole and the spring gear base connection hole are connected to the spring shaft base and the spring gear base, respectively. The spring shaft base and the spring gear base are connected to the primary gear shaft and the primary gear wheel, respectively.

[0009] Both the primary and secondary crushing chambers are equipped with screen plates, and both screen plates are inclined at a certain angle. The inclination angle of the screen plate after the primary crushing chamber is greater than that of the screen plate after the secondary crushing chamber. The inclination angle of the screen plates and the size of the screen holes can be adjusted according to different particle masses.

[0010] The passivation cavity consists of passivation teeth on the cavity wall, eccentric disk swing arm blades, an eccentric disk, eccentric disk convex disks, swing arm blade circular holes, swing arm blade passivation teeth, and swing arm blade outer shafts. The eccentric disk is driven by an eccentric shaft, and three eccentric disk convex disks are welded to the outer side of the eccentric disk. The eccentric disk drives the eccentric disk convex disks to rotate clockwise. The eccentric disk convex disks are connected to the eccentric disk swing arm blades through the circular holes of the swing arm blades. A fixed shaft is provided inside the circular holes of the swing arm blades. The fixed shaft only constrains the position of the eccentric disk swing arm blades on the side closest to the eccentric disk, while the outer position of the eccentric disk swing arm blades is constrained by the passivation cavity wall. The outer shaft of the swing arm blades rotates clockwise in close contact with the passivation cavity wall.

[0011] Furthermore, the passivation teeth on the passivation cavity wall are tightly connected to the passivation cavity wall and are evenly distributed on the passivation cavity wall. Passivation teeth for the eccentric disc swing arm blades are provided on both the inner and outer sides. The axial tangents of both the passivation teeth on the passivation cavity wall and the passivation teeth on the swing arm blades are semi-circular, with a diameter ratio of 6:5. The center of the eccentric disk is located directly to the left of the center of the passivation cavity. The ratio of the distance from the center of the eccentric disk to the center of the passivation cavity to the radius of the passivation cavity is 1:4, and the ratio of the diameter of the eccentric disk to the diameter of the passivation cavity is 1:2.

[0012] The passivation chamber is equipped with a stirring and mixing device, which consists of a stirring blade shaft and stirring blades. The stirring blades are composed of five sub-blades that can rotate along the stirring blade shaft. The stirring blades are evenly distributed along the circumference, and the included angle between the six stirring blades is 60°.

[0013] The jet oscillation device is provided with branch channels, branch partition walls, an outlet sweeping zone, a main channel, and a main channel partition wall. The jet oscillation device is symmetrically distributed in the center. The branch channels are located on the outermost side of the jet oscillation device. The branch partition walls are provided on the inner side of the branch channels. The main channel is located on the inner side of the branch partition walls. The main channel partition wall is provided at the rear of the main channel. The main channel partition wall can further separate the two-phase flow in the main channel and induce stronger vortices. The initial diameter ratio of the branch channel to the main channel is 5:11. The diameter of the main channel gradually increases along the fluid flow. After the diameter reaches its maximum, it is divided into two branch channels with the same diameter by the main channel baffle.

[0014] The beneficial effects of this invention are: (1) This invention achieves graded crushing of particles of different volumes in a solid-liquid two-phase flow through a particle settling chamber. When fluids containing different volumes pass through the particle settling chamber, due to the different forces acting on the particles, larger particles settle first and enter the primary crushing chamber, medium-sized particles enter the secondary crushing chamber, smaller particles enter the tertiary crushing chamber, and the smallest particles enter the pretreatment fluid pipeline with the fluid. By utilizing the particle settling law, particles of different volumes can be effectively separated and sent to different crushing chambers, reducing redundant settings for particle separation and reducing energy consumption.

[0015] (2) This invention uses a combination of a primary crushing chamber, a secondary crushing chamber, and a tertiary crushing chamber to efficiently crush particles into suitable sizes. Particles of different sizes are efficiently divided and crushed into suitable sizes through symmetrically distributed crushing chambers. Furthermore, incompletely processed particles are fed into the next stage for further crushing via a combination of a sieve plate and a particle lifting device. The vibration damping and stabilizing devices in each crushing chamber effectively reduce vibration and blade wear within the crushing chamber.

[0016] (3) This invention effectively reduces the number and size of sharp angles of particles through a passivation chamber and a stirring and mixing device. When solid particles enter the passivation chamber, they are subjected to the combined action of the passivation teeth on the chamber wall and the passivation teeth on the blades, which effectively flattens and smooths the sharp angles of the particles. The collisions between particles also reduce the size of the sharp angles. The stirring and mixing device further increases the collisions between particles and between particles and the passivation teeth. Furthermore, the design of the particle passivation chamber effectively increases the kinetic and static pressure energy of the solid-liquid two-phase fluid.

[0017] (4) This invention achieves thorough mixing of particles and fluid through a jet oscillation device, increasing the uniformity of the solid-liquid two-phase system in the outlet channel and reducing wear and uneven stress on the slurry pump blades. The fluid interacts with the branch and main channels through the jet oscillation device, forming a jet sweeping area within the solid-liquid mixing chamber and at the outlet of the jet oscillation device. Within this area, the fluid can fully mix with the treated particles, extending the service life of the slurry pump, balancing the stress on the slurry pump blades, and the elliptical cylindrical solid-liquid mixing chamber shape design can convert fluid kinetic energy into static pressure energy, reducing pressure drop within the device. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of an anti-wear pretreatment device for slurry pumps according to the present invention. Figure 2 This is an enlarged view of the primary crushing chamber structure. Figure 3 This is an enlarged view of the structure of the primary particle lifting device. Figure 4 This is an enlarged view of the secondary crushing chamber structure. Figure 5 This is an enlarged view of the structure of the secondary particle lifting device. Figure 6 This is an enlarged view of the three-stage crushing chamber structure. Figure 7 This is an enlarged view of the primary vibration damping and stabilization device. Figure 8 This is an enlarged view of the passivation cavity structure. Figure 9 This is an enlarged view of the mixing device. Figure 10 This is an enlarged view of the jet oscillation device structure. In the picture: 1-Inlet pipe; 2-Particle settling chamber; 3-First-stage crushing chamber inlet; 4-Second-stage crushing chamber inlet; 5-Third-stage crushing chamber inlet; 6-Secondary particle lifting device; 61-Secondary particle lifting device wall; 62-Secondary disc shaft blades; 63-Secondary drive shaft; 7- Primary crushing chamber; 71- Primary shock absorption and stabilization device; 711- Spring toothed disc base connection hole; 712- Spring; 713- Spring shaft base connection hole; 714- Spring toothed disc base; 715- Spring shaft base; 72- Primary toothed disc blade; 73- Primary toothed disc wheel shaft; 74- Primary toothed disc wheel; 75- Primary crushing chamber wall blade; 8-First-stage particle lifting device; 81-First-stage particle lifting device wall; 82-First-stage disc blade; 83-First-stage drive shaft; 9-Third-stage crushing chamber; 91-Third-stage shock absorption and stabilization device; 92-Third-stage toothed disc blades; 93-Third-stage toothed disc wheel shaft; 94-Third-stage toothed disc wheel; 95-Third-stage crushing chamber wall blades; 10-Secondary crushing chamber; 101-Secondary shock absorption and stabilization device; 102-Secondary toothed disc blades; 103-Secondary toothed disc shaft; 104-Secondary primary disc wheel; 105-Secondary crushing chamber wall blades; 11-Sieve plate; 12-First-stage crushing chamber outlet; 13-Third-stage crushing chamber outlet; 14-Particle mixing chamber; 15-Pre-treatment fluid pipeline; 16-Passivation chamber inlet; 17-Mixing and mixing device; 171-Mixing blade shaft; 172-Mixing blade; 18- Passivation cavity wall; 19-Passivation cavity; 191-Passivation teeth on the wall of the passivation cavity; 192-Eccentric disk swing arm blade; 193-Eccentric disk; 194-Eccentric disk convex disc; 195-Swing arm blade circular hole; 196-Swing arm blade passivation teeth; 197-Swing arm blade outer shaft; 20 - Passivation chamber outlet wall; 21 - Passivation chamber outlet; 22 - Jet oscillation device inlet; 23 - Outlet pipe; 24 - Solid-liquid mixing chamber; 25-Jet oscillation device; 251-Branch flow channel; 252-Branch partition wall; 253-Outlet sweeping zone; 254-Main flow channel; 255-Main flow channel partition wall. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0020] Example 1

[0021] like Figure 1 As shown, an anti-wear pretreatment device for slurry pumps includes, from top to bottom, an inlet pipe 1, a particle settling chamber 2, a crushing chamber, a particle mixing chamber 14, a passivation chamber 19, a solid-liquid mixing chamber 24, and a jet vibration device 25; wherein, the crushing chamber includes a primary crushing chamber 7, a secondary crushing chamber 10, and a tertiary crushing chamber 9. The inlet pipe 1 is connected to the particle settling chamber 2. The fluid containing both solid and liquid phases enters the particle settling chamber 2 through the inlet pipe 1. Particles of different masses enter the primary crushing chamber 7, the secondary crushing chamber 10 and the tertiary crushing chamber 9, which are connected to the particle settling chamber 2. Screen plates 11 are installed at the outlets of the primary crushing chamber 7 and the secondary crushing chamber 10. The screen plate 11 after the primary crushing chamber 7 is connected to the primary particle lifting device 8. The outlet of the primary particle lifting device 8 is connected to the inlet of the secondary crushing chamber 10. The screen plate 11 after the secondary crushing chamber 10 is connected to the secondary particle lifting device 6. The outlet of the secondary particle lifting device 6 is connected to the inlet 5 of the tertiary crushing chamber. The outlets of the primary crushing chamber 7, the secondary crushing chamber 10 and the tertiary crushing chamber 9 are all connected to the inlet 16 of the passivation chamber. The inlet 16 of the passivation chamber is connected to the passivation chamber 19. The passivation chamber 19 has a built-in stirring and mixing device 17. The lower part of the passivation chamber 19 is connected to the outlet 21 of the passivation chamber. The outlet 21 of the passivation chamber is directly connected to the solid-liquid mixing chamber 24. The particle settling chamber 2 is also connected to the pretreatment fluid pipeline 15. After the fluid containing both solid and liquid phases passes through the particle settling chamber 2, the fluid containing fine particles passes through the pretreatment fluid pipeline 15 connected to the particle settling chamber 2. The pretreatment fluid pipeline 15 is connected to the inlet side of the jet oscillation device 25 through the inlet 22 of the jet oscillation device. The outlet side of the jet oscillation device 25 is connected to one side of the solid-liquid mixing chamber 24. The top of the solid-liquid mixing chamber 24 is connected to the passivation chamber outlet 21. The other side of the solid-liquid mixing chamber 24 is connected to the outlet pipeline 23. After the fluid containing high solid volume fraction and the fluid containing low solid volume fraction are fully mixed in the solid-liquid mixing chamber 24, they are discharged through the outlet pipeline 23.

[0022] like Figure 2 As shown, the primary crushing chamber 7 is equipped with a primary shock-absorbing and stabilizing device 71, a primary toothed disc blade 72, a primary toothed disc wheel shaft 73, a primary toothed disc wheel 74, and primary crushing chamber wall blades 75. The primary crushing chamber wall blades 75 are evenly distributed on the inner wall surface of the primary crushing chamber 7. The primary toothed disc blades 72 are connected to the primary toothed disc wheel 74 and are evenly distributed on the outer surface of the primary toothed disc wheel 74. The primary toothed disc wheel shaft 73 is connected to the primary toothed disc wheel 74 through four primary shock-absorbing and stabilizing devices 71 with an included angle of 90°. The primary shock-absorbing and stabilizing devices 71 play a role in shock absorption while connecting the drive of the two. Among them, the blade included angle of the first-stage crushing chamber wall blade 75 is 54°, and the height-to-width ratio of the first-stage toothed disc blade 72 is 5:4; like Figure 4 As shown, the secondary crushing chamber 10 is equipped with a secondary damping and stabilizing device 101, a secondary toothed disc blade 102, a secondary toothed disc wheel shaft 103, a secondary toothed disc wheel 104, and secondary crushing chamber wall blades 105. The secondary crushing chamber wall blades 105 are evenly distributed on the inner wall surface of the secondary crushing chamber 10. The secondary toothed disc blades 102 are connected to the secondary toothed disc wheel 104 and are evenly distributed on the outer surface of the secondary toothed disc wheel 104. The secondary toothed disc wheel shaft 103 is connected to the secondary toothed disc wheel 104 through five secondary damping and stabilizing devices with an included angle of 72°. The structure of the secondary damping and stabilizing device is basically the same as that of the primary damping and stabilizing device 71, with the difference being the length of the spring shaft base 715 and the spring toothed disc base 714. Among them, the blade included angle of the secondary crushing chamber wall blade 105 is 84°, and the height-to-width ratio of the secondary toothed disc blade 102 is 4:3; like Figure 6As shown, the three-stage crushing chamber 9 is equipped with a three-stage shock absorption and stabilization device 91, a three-stage toothed disc blade 92, a three-stage toothed disc wheel shaft 93, a three-stage toothed disc wheel 94, and a three-stage crushing chamber wall blade 95. The three-stage crushing chamber wall blade 95 is evenly distributed on the inner wall surface of the three-stage crushing chamber 9. The three-stage toothed disc blade 92 is connected to the three-stage toothed disc wheel 94 and is evenly distributed on the outer surface of the three-stage toothed disc wheel 94. The three-stage toothed disc wheel shaft 93 is connected to the three-stage toothed disc wheel 94 through six three-stage shock absorption and stabilization devices with an included angle of 60°. The structure of the three-stage shock absorption and stabilization device 91 is basically the same as that of the first-stage shock absorption and stabilization device 71. The difference is the length of the spring shaft base 715 and the spring toothed disc base 714. Among them, the blade of the third-stage crushing chamber wall blade 95 is a semi-circular blade, and the blade of the third-stage toothed disc 92 is also a semi-circular blade. The diameter ratio of the third-stage crushing chamber wall blade 95 to the three-foot toothed disc blade 92 is 1:2.

[0023] Optional, such as Figure 7 As shown, the primary damping and stabilizing device 71 consists of a spring gear base connection hole 711, a spring 712, a spring shaft base connection hole 713, a spring gear base 714, and a spring shaft base 715. Three springs 712 are arranged at equal intervals. The spring shaft base connection hole 713 and the spring gear base connection hole 711 are located on both sides of the spring 712. The spring shaft base connection hole 713 and the spring gear base connection hole 711 are connected to the spring shaft base 715 and the spring gear base 714, respectively. The spring shaft base 715 and the spring gear base 714 are connected to the primary gear shaft 73 and the primary gear wheel 74, respectively.

[0024] Both the primary crushing chamber 7 and the secondary crushing chamber 10 are equipped with screen plates 11. Both screen plates 11 are inclined at a certain angle, with the inclination angle of the screen plate 11 after the primary crushing chamber 7 being greater than that of the screen plate 11 after the secondary crushing chamber 10. The inclination angle and the size of the screen holes of the screen plates 11 can be adjusted according to different particle masses.

[0025] Optionally, the diameter ratio of the primary crushing chamber gear 74, the secondary crushing chamber gear 104, and the tertiary crushing chamber gear 94 is 2:3:4; the distance between the toothed disc blades and the crushing chamber wall blades in the primary crushing chamber 7, the secondary crushing chamber 10, and the tertiary crushing chamber 9 decreases sequentially.

[0026] like Figure 8 As shown, the passivation cavity 19 is composed of passivation teeth 191 on the passivation cavity wall, eccentric disk swing arm blade 192, eccentric disk 193, eccentric disk convex disk 194, swing arm blade circular hole 195, swing arm blade passivation teeth 196, and swing arm blade outer shaft 197. The eccentric disk 193 is driven by an eccentric shaft. Three eccentric disk convex disks 194 are welded to the outside of the eccentric disk 193. The eccentric disk 193 drives the eccentric disk convex disks 194 to rotate clockwise. The eccentric disk convex disks 194 are connected to the eccentric disk swing arm blades 192 through the swing arm blade circular holes 195. A fixed shaft is provided in the swing arm circular holes 195. The fixed shaft only constrains the position of the eccentric disk swing arm blades 192 on the side close to the eccentric disk 193. The outer position of the eccentric disk swing arm blades 192 is constrained by the passivation cavity wall surface 18. The outer shaft 197 of the swing arm blades rotates clockwise in close contact with the passivation cavity wall surface 18.

[0027] Optionally, the passivation teeth 191 on the passivation cavity wall are tightly connected to the passivation cavity wall 18 and are evenly distributed on the passivation cavity wall 18. Passivation teeth 196 are provided on both the inner and outer sides of the eccentric disc swing arm blade 192. The axial cross-sections of both the passivation teeth 191 on the passivation cavity wall and the passivation teeth 196 on the swing arm blade are semi-circular, with a diameter ratio of 6:5. The center of the eccentric disk 193 is located directly to the left of the center of the passivation cavity 19. The distance from the center of the eccentric disk 193 to the center of the passivation cavity 19 is 1:4 to the radius of the passivation cavity 19. The ratio of the diameter of the eccentric disk 193 to the diameter of the passivation cavity 19 is 1:2.

[0028] like Figure 9 As shown, the passivation cavity 19 is equipped with a stirring and mixing device 17, which consists of a stirring blade shaft 171 and stirring blades 172. The stirring blades 172 are composed of five sub-blades and can rotate along the stirring blade shaft 171. The stirring blades 172 are evenly distributed along the circumference, and the included angle between the six stirring blades 172 is 60°.

[0029] like Figure 10 As shown, the jet oscillation device 25 is provided with branch flow channels 251, branch partition walls 252, outlet sweeping zone 253, main flow channel 254 and main flow channel partition walls 255. The jet oscillation device 25 is centrally symmetrically distributed. The branch flow channels 251 are located on the outermost side of the jet oscillation device 25. The branch partition walls 252 are provided on the inner side of the branch flow channels 251. The main flow channel 254 is located on the inner side of the branch partition walls 252. The main flow channel partition walls 255 are provided on the rear side of the main flow channel 254. The main flow channel partition walls 255 can further separate the two-phase flow in the main flow channel 254 and induce stronger vortices. The initial diameter ratio of the branch channel 251 to the main channel 254 is 5:11. The diameter of the main channel 254 gradually increases along the fluid flow. After the diameter increases to the maximum, it is divided into two branch channels with the same diameter by the main channel baffle 255.

[0030] The working process of this invention is as follows: In the early stage of the device operation, a solid-liquid two-phase fluid containing particles of different sizes enters the particle settling chamber 2 through the inlet pipe 1. The particles of different sizes have different masses, and the particles of different masses move horizontally from left to right in the particle settling chamber 2. The particles of different masses have different settling velocities during the movement. The larger particles first enter the primary crushing chamber inlet 3, the medium-sized particles enter the secondary crushing chamber inlet 4, and the smaller particles enter the tertiary crushing chamber inlet 5. After three stages of settling, the fluid containing the smallest particles enters the pretreatment fluid pipe 15.

[0031] When fluid containing large particles enters the primary crushing chamber 7, the primary toothed disc wheel 74 and the primary toothed disc blades 72 are driven by the primary toothed disc wheel shaft 73. The left primary toothed disc wheel 74 moves counterclockwise, and the right primary toothed disc wheel 74 moves clockwise. After entering the primary crushing chamber 7, the particles are carried by the primary toothed disc blades 72 in a circular motion. The particles move with the primary toothed disc blades 72 to the contact point with the primary crushing chamber wall blades 75. The large particles are crushed into particles of different sizes under the mutual compression of the primary toothed disc blades 72 and the primary crushing chamber wall blades 75. During this process, the primary toothed disc wheel 74 is subjected to large radial force fluctuations. Therefore, the primary vibration damping and stabilizing device 71 connecting the primary toothed disc wheel shaft 73 and the primary toothed disc wheel 74 can reduce its vibration during operation, extend the service life of the components in the primary crushing chamber 7, and reduce vibration and noise. The primary shock absorption and stabilization device 71 includes a spring toothed disc base connection hole 711, a spring 712, a spring shaft base connection hole 713, a spring toothed disc base 714, and a spring shaft base 715. After being crushed in the primary crushing chamber 7, the particles enter the primary crushing chamber outlet 12. The primary crushing chamber outlet 12 is equipped with a screen plate 11, through which particles that meet the volume requirements can pass smoothly. However, most particles that do not meet the volume requirements after crushing can move downwards and to the right along the screen plate 11 to the primary particle lifting device 8. The primary drive shaft 83 drives the primary disc shaft blades 82 to rotate, lifting the medium-sized particles to the secondary crushing chamber inlet 4. These particles, along with the particles that settle due to gravity in the particle settling chamber 2, enter the secondary crushing chamber inlet 4. Figure 3 The device.

[0032] Fluid containing medium-sized particles enters the secondary crushing chamber 10. The secondary toothed disc blades 102 and the secondary crushing chamber wall blades 105 in the secondary crushing chamber 10 have different shapes and sizes than the primary toothed disc blades 72 and the primary crushing chamber wall blades 75 in the primary crushing chamber 7. Their shapes and sizes are more suitable for crushing medium-sized particles. The secondary toothed disc wheel 104 in the secondary crushing chamber 10 moves in the same way as the primary toothed disc wheel 74 under the drive of the secondary toothed disc wheel shaft 103. After being crushed by the relative movement and compression cutting of the secondary toothed disc blades 102 and the secondary crushing chamber wall blades 105, the medium-sized particles are reduced to smaller particles and incompletely crushed medium-sized particles. The secondary vibration damping and stabilization device 101 can simultaneously reduce the vibration within the secondary crushing chamber 10. Smaller particles can pass through the screen plate 11, while medium-sized particles that are not fully crushed are blocked by the screen plate 11 and move downwards and to the right along the arrangement direction of the screen plate 11. The particles move to the secondary particle lifting device 6, where the secondary drive shaft 63 drives the secondary disc blades 62 to lift them to the inlet 5 of the tertiary crushing chamber. These particles, along with the smaller particles that naturally settle in the particle settling chamber 2, enter the inlet 5 of the tertiary crushing chamber. Figure 5 The device.

[0033] After mixing, the particles enter the tertiary crushing chamber 9. The tertiary toothed wheel 94 within the tertiary crushing chamber 9, driven by the tertiary toothed wheel shaft 93, performs the same motion as the primary toothed wheel 74. The tertiary toothed wheel blade 92 connected to the tertiary toothed wheel 94 and the tertiary crushing chamber wall blade 95 connected to the wall of the tertiary crushing chamber 9 are both semi-circular, with a smaller distance between them. This arc-shaped design and small spacing are intended to better and more efficiently process the incoming smaller particles, crushing them to a suitable size and pre-treating the sharp edges of the particles. The crushed particles, along with those processed in the primary crushing chamber 7 and the secondary crushing chamber 10, converge into the particle mixing chamber 14. The pre-treated particles then enter the passivation chamber inlet 16 connected below the particle mixing chamber 14.

[0034] During the middle stage of device operation, particles enter the passivation chamber 19 through the passivation chamber inlet 16. In the eccentric disk structure set within the passivation chamber 19, the eccentric disk shaft drives the eccentric disk 193 to rotate clockwise. Simultaneously, the eccentric disk cam 194 connected to the eccentric disk 193 also rotates clockwise under its influence. The circular hole 195 of the swing arm blade connected to the eccentric disk cam 194 restricts the inner side of the eccentric disk swing arm blade 192 from always performing the same circumferential motion as the eccentric disk cam 194. However, the eccentric disk swing arm blade 192 does not perform a simple circumferential motion; its outer side, i.e., the outer shaft 197 of the swing arm blade, always performs a circumferential motion along the passivation chamber wall 18, and it always moves in close contact with the passivation teeth 191 on the passivation chamber wall. Figure 8The passivation cavity 19 shown is divided into three regions, numbered a, b, and c, from largest to smallest. As the eccentric disc swing arm blade 192 moves, region a first increases in size and then decreases in size after the particles flow in through the passivation cavity inlet 16. Region b gradually decreases to the size of region c, and region c gradually increases to the size of region a. This design allows the particles entering the passivation cavity 19 to fully contact and collide with the passivation teeth 191 on the passivation cavity wall and the passivation teeth 196 on the swing arm blade, effectively flattening and smoothing the sharp parts of the particles and processing them into a near-spherical shape. This can effectively reduce the wear of the slurry pump flow components in the subsequent slurry pump. Furthermore, as the eccentric disk 193 moves, the eccentric disk swing arm blades 192 move accordingly, causing changes in the volume of the three chambers a, b, and c. As the volume of the chamber at the passivation chamber outlet 21 decreases, the pressure within the chamber increases, providing a certain amount of kinetic and static pressure energy to the fluid containing the treated solid-liquid two-phase mixture, thus reducing the overall pressure drop of the invention. A stirring and mixing device 17 is installed on the front wall of the passivation chamber 19. The stirring blade shaft 171 drives the stirring blades 172 to perform circumferential motion. The tilt angle of the stirring blades 172 enhances the particle movement within the passivation chamber 19, allowing the particles to fully contact the two passivation teeth for further deep processing.

[0035] In the later stages of device operation, the fluid in the primary treatment fluid pipe 15 enters the inlet 22 of the jet oscillation device. The fluid entering the inlet 22 is divided into multiple directions, with the largest portion flowing horizontally into the main channel 254. As it flows in the main channel 254, it is split into two identical streams by the main channel partition wall 255, generating more chaotic vortices during the splitting process. A smaller portion of the fluid enters the branch channels 251 on both sides. The fluid in the branch channels 251 and the fluid in the main channel 254 interact at the outlet of the jet oscillation device, forming a regular jet sweeping region 253. This region effectively covers the particles at the passivation chamber outlet 21. The particles pass through the passivation chamber outlet 21 and flow downwards into the solid-liquid mixing chamber 24. The two-phase flow containing a high concentration of fine particles mixes thoroughly in the jet sweeping region 253 with the two-phase flow containing a low concentration of fine particles ejected from the jet oscillation device 25, and flows through the particle mixing chamber 14 to the outlet pipe 23. Furthermore, the solid-liquid mixing chamber 24 is designed as an elliptical cylinder, with its cross-sectional area gradually decreasing from right to left along the central axis. As the cross-sectional area decreases, the static pressure energy of the fluid gradually increases, which can further enhance the static pressure energy of the fluid.

[0036] The wear of slurry pumps is mainly caused by the collision of sharp-angled particles with the walls of the flow-through components. Larger particles cause greater damage to the flow-through walls, and larger particles are prone to clogging and vibration, resulting in uneven axial force on the pump blades. The particles treated by this invention can effectively reduce their volume, and at the same time, the particles pass through the passivation chamber 19 to reduce and minimize the sharp angles of the particles. This reduces wear on the flow-through components of the slurry pump connected to the subsequent outlet pipe 23, reduces vibration and noise caused by large particles, and extends the stability and service life of the slurry pump.

[0037] The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions, or modifications made by those skilled in the art without departing from the essence of the present invention should fall within the protection scope of the present invention.

Claims

1. A wear-resistant pretreatment device for slurry pumps, characterized in that, It includes, from top to bottom, an inlet pipe (1), a particle settling chamber (2), a crushing chamber, a particle mixing chamber (14), a passivation chamber (19), a solid-liquid mixing chamber (24), and a jet oscillation device (25); wherein, the crushing chamber includes a primary crushing chamber (7), a secondary crushing chamber (10), and a tertiary crushing chamber (9); The inlet pipe (1) is connected to the particle settling chamber (2), which is connected to the primary crushing chamber (7), the secondary crushing chamber (10), and the tertiary crushing chamber (9). Screen plates (11) are installed at the outlets of the primary crushing chamber (7) and the secondary crushing chamber (10). The screen plate (11) after the primary crushing chamber (7) is connected to the primary particle lifting device (8). The outlet of the primary particle lifting device (8) is connected to the inlet of the secondary crushing chamber (10). The screen plate (11) after the secondary crushing chamber (10) is connected to the secondary particle lifting device (6). The outlet of the secondary particle lifting device (6) is connected to the inlet of the tertiary crushing chamber (5). The outlets of the primary crushing chamber (7), the secondary crushing chamber (10) and the tertiary crushing chamber (9) are all connected to the inlet (16) of the passivation chamber. The inlet (16) of the passivation chamber is connected to the passivation chamber (19). The passivation chamber (19) has a built-in stirring and mixing device (17). The lower part of the passivation chamber (19) is connected to the outlet (21) of the passivation chamber. The outlet (21) of the passivation chamber is directly connected to the solid-liquid mixing chamber (24). The particle settling chamber (2) is also connected to the pretreatment fluid pipeline (15). The pretreatment fluid pipeline (15) is connected to the inlet side of the jet oscillation device (25) through the inlet (22) of the jet oscillation device. The outlet side of the jet oscillation device (25) is connected to one side of the solid-liquid mixing chamber (24). The top of the solid-liquid mixing chamber (24) is connected to the passivation chamber outlet (21). The other side of the solid-liquid mixing chamber (24) is connected to the outlet pipeline (23). After the fine particles with high solid volume fraction and the fine particles with low solid volume fraction are fully mixed in the solid-liquid mixing chamber (24), they are discharged through the outlet pipeline (23).

2. The anti-wear pretreatment device for slurry pumps according to claim 1, characterized in that, The primary crushing chamber (7) is provided with a primary shock-absorbing and stabilizing device (71), a primary toothed disc blade (72), a primary toothed disc wheel shaft (73), a primary toothed disc wheel (74), and a primary crushing chamber wall blade (75). The primary crushing chamber wall blade (75) is evenly distributed on the inner wall surface of the primary crushing chamber (7). The primary toothed disc blade (72) is connected to the primary toothed disc wheel (74) and is evenly distributed on the outer surface of the primary toothed disc wheel (74). The primary toothed disc wheel shaft (73) is connected to the primary toothed disc wheel (74) through four primary shock-absorbing and stabilizing devices (71) with an included angle of 90°. The primary shock-absorbing and stabilizing devices (71) play a role in shock absorption while connecting the two drives. The secondary crushing chamber (10) is provided with a secondary damping and stabilizing device (101), a secondary toothed disc blade (102), a secondary toothed disc wheel shaft (103), a secondary toothed disc wheel (104), and a secondary crushing chamber wall blade (105). The secondary crushing chamber wall blade (105) is evenly distributed on the inner wall surface of the secondary crushing chamber (10). The secondary toothed disc blade (102) is connected to the secondary toothed disc wheel (104) and is evenly distributed on the outer surface of the secondary toothed disc wheel (104). The secondary toothed disc wheel shaft (103) is connected to the secondary toothed disc wheel (104) through five secondary damping and stabilizing devices with an included angle of 72°. The structure of the secondary damping and stabilizing device is basically the same as that of the primary damping and stabilizing device (71), with the difference being the length of the spring shaft base (715) and the spring toothed disc base (714). The three-stage crushing chamber (9) is equipped with a three-stage shock-absorbing and stabilizing device (91), a three-stage toothed disc blade (92), a three-stage toothed disc wheel shaft (93), a three-stage toothed disc wheel (94), and a three-stage crushing chamber wall blade (95). The three-stage crushing chamber wall blade (95) is evenly distributed on the inner wall surface of the three-stage crushing chamber (9). The three-stage toothed disc blade (92) is connected to the three-stage toothed disc wheel (94) and is evenly distributed on the outer surface of the three-stage toothed disc wheel (94). The three-stage toothed disc wheel shaft (93) is connected to the three-stage toothed disc wheel (94) through six three-stage shock-absorbing and stabilizing devices with an included angle of 60°. The structure of the three-stage shock-absorbing and stabilizing device (91) is basically the same as that of the first-stage shock-absorbing and stabilizing device (71). The difference is the length of the spring shaft base (715) and the spring toothed disc base (714).

3. The anti-wear pretreatment device for slurry pumps according to claim 2, characterized in that, The blade angle of the first-stage crushing chamber wall blade (75) is 54°, and the aspect ratio of the first-stage toothed disc blade (72) is 5:4; The blade angle of the secondary crushing chamber wall blade (105) is 84°, and the aspect ratio of the secondary toothed disc blade (102) is 4:3; The blade of the three-stage crushing chamber wall blade (95) is a semi-circular blade, and the blade of the three-stage toothed disc (92) is also a semi-circular blade. The diameter ratio of the three-stage crushing chamber wall blade (95) to the three-stage toothed disc blade (92) is 1:

2.

4. The anti-wear pretreatment device for slurry pumps according to claim 2, characterized in that, The diameter ratio of the first-stage crushing chamber gear (74), the second-stage crushing chamber gear (104), and the third-stage crushing chamber gear (94) is 2:3:4; The distance between the toothed disc blades and the blades on the crushing chamber wall in the primary crushing chamber (7), secondary crushing chamber (10) and tertiary crushing chamber (9) decreases sequentially.

5. The anti-wear pretreatment device for slurry pumps according to claim 2, characterized in that, The primary shock absorption and stabilization device (71) consists of a spring gear base connection hole (711), a spring (712), a spring shaft base connection hole (713), a spring gear base (714), and a spring shaft base (715). Three springs (712) are provided at equal intervals. The spring (712) has a spring shaft base connection hole (713) and a spring gear base connection hole (711) on both sides. The spring shaft base connection hole (713) and the spring gear base connection hole (711) are connected to the spring shaft base (715) and the spring gear base (714), respectively. The spring shaft base (715) and the spring gear base (714) are connected to the primary gear shaft (73) and the primary gear wheel (74), respectively.

6. The anti-wear pretreatment device for slurry pumps according to claim 1, characterized in that, Both the primary crushing chamber (7) and the secondary crushing chamber (10) are equipped with sieve plates (11). Both sieve plates (11) are inclined at a certain angle. The sieve plate (11) after the primary crushing chamber (7) is inclined at a greater angle than the sieve plate (11) after the secondary crushing chamber (10). The inclination angle and the size of the sieve holes of the sieve plates (11) can be adjusted according to different particle masses.

7. The anti-wear pretreatment device for slurry pumps according to claim 1, characterized in that, The passivation cavity (19) is composed of passivation teeth (191) on the passivation cavity wall, eccentric disk swing arm blade (192), eccentric disk (193), eccentric disk convex disk (194), swing arm blade round hole (195), swing arm blade passivation teeth (196), and swing arm blade outer shaft (197). Among them, the eccentric disk (193) is driven by the eccentric shaft. Three eccentric disk cams (194) are welded on the outside of the eccentric disk (193). The eccentric disk (193) drives the eccentric disk cams (194) to rotate clockwise. The eccentric disk cams (194) are connected to the eccentric disk swing arm blades (192) through the swing arm blade round hole (195). The swing arm round hole (195) is provided with a fixed shaft. The fixed shaft only constrains the position of the eccentric disk swing arm blades (192) close to the side of the eccentric disk (193). The outer position of the eccentric disk swing arm blades (192) is constrained by the passivation cavity wall (18). The outer shaft (197) of the swing arm blades is tightly attached to the passivation cavity wall (18) and rotates clockwise.

8. The anti-wear pretreatment device for slurry pumps according to claim 7, characterized in that, The passivation teeth (191) on the passivation cavity wall are closely connected to the passivation cavity wall (18) and are evenly distributed on the passivation cavity wall (18); the inner and outer sides of the eccentric disc swing arm blade (192) are provided with swing arm blade passivation teeth (196); the axial cross-sections of the passivation teeth (191) on the passivation cavity wall and the swing arm blade passivation teeth (196) are both semi-circular, and the diameter ratio between the two is 6:5; The center of the eccentric disk (193) is located directly to the left of the center of the passivation cavity (19). The distance from the center of the eccentric disk (193) to the center of the passivation cavity (19) is 1:4 to the radius of the passivation cavity (19). The diameter of the eccentric disk (193) is 1:2 to the diameter of the passivation cavity (19).

9. The anti-wear pretreatment device for slurry pumps according to claim 1, characterized in that, The passivation cavity (19) is equipped with a stirring and mixing device (17), which consists of a stirring blade shaft (171) and stirring blades (172). The stirring blades (172) are composed of five sub-blades that rotate along the stirring blade shaft (171). The stirring blades (172) are evenly distributed along the circumference, and the included angle between the six stirring blades (172) is 60°.

10. The anti-wear pretreatment device for slurry pumps according to claim 1, characterized in that, The jet oscillation device (25) is provided with branch flow channels (251), branch partition walls (252), outlet sweeping zone (253), main flow channel (254) and main flow channel partition walls (255); the jet oscillation device (25) is centrally symmetrically distributed, the branch flow channels (251) are located on the outermost side of the jet oscillation device (25), the branch flow channels (251) are provided with branch partition walls (252) on the inner side, the main flow channel (254) is located on the inner side of the branch partition walls (252), the main flow channel (254) is provided at the rear of the main flow channel (254), and the main flow channel partition walls (255) can further separate the two-phase flow in the main flow channel (254) and induce stronger vortices; The initial diameter ratio of the branch channel (251) to the main channel (254) is 5:

11. The diameter of the main channel (254) gradually increases along the fluid flow. After the diameter increases to the maximum, it is divided into two branch channels with the same diameter by the main channel baffle (255).

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