A high-efficiency and high-output slurry pump

Abstract

The present invention belongs to the field of slurry pumps, and specifically relates to a high-efficiency and high-output slurry pump, comprising an impeller arranged in a pump body, a rotating shaft connected to a hub of the impeller and used for driving the impeller to rotate, and a stuffing box arranged on the rotating shaft for preventing leakage of the pump body, wherein a feed end face and a feed port located on the front side of the feed end face are arranged on the impeller, a diverter sleeve coaxially arranged with the feed port and a drainage cone located in the diverter sleeve are arranged on the feed end face, the drainage cone protrudes toward the feed port, the fixed end of the diverter sleeve is fixedly connected to the feed end face, the cantilevered length of the cantilevered end is greater than the protruding length of the drainage cone, the inner and outer side walls of the diverter sleeve are provided with a first spiral channel, and a group of diverter channels respectively connected with the first spiral channel are opened on the fixed end of the diverter sleeve, the slurry pump can effectively reduce the impact wear of the slurry on the impeller and improve the output performance of the slurry pump.

Description

Technical Field

[0001] The invention belongs to the field of slurry pumps, and in particular relates to a high-efficiency and high-output slurry pump. Background Art

[0002] The slurry inlet and slurry outlet of a slurry pump are usually arranged vertically, wherein the axial direction of the slurry inlet is perpendicular to the feed end face of the impeller, and the axial direction of the slurry outlet of the slurry pump is parallel to the feed end face of the impeller. The slurry enters the slurry pump along the slurry inlet and enters the impeller from the feed port of the impeller to directly impact the feed end face of the impeller, which can easily cause wear of the feed end face of the impeller, affect the impact resistance of the feed end face, and shorten the service life of the impeller; on the other hand, the slurry will form turbulence at the feed port of the impeller, resulting in the slurry not being able to be discharged from the pump body well as the rotation of the impeller, affecting the output efficiency. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a high-efficiency and high-output slurry pump, which can effectively reduce the impact wear of the slurry on the impeller, extend the service life of the impeller, and improve the output performance of the slurry pump.

[0004] The specific technical solution adopted by the present invention is:

[0005] A high-efficiency and high-output slurry pump comprises an impeller arranged in a pump body, a rotating shaft connected to the hub of the impeller and used to drive the impeller to rotate, and a stuffing box arranged on the rotating shaft for preventing leakage of the pump body, the impeller is provided with a feed end face and a feed port located on the front side of the feed end face, the pump body is provided with a slurry outlet, the feed end face is provided with a diverter sleeve coaxially arranged with the feed port and a drainage cone located in the diverter sleeve, the drainage cone protrudes toward the feed port, the fixed end of the diverter sleeve is fixedly connected to the feed end face, the cantilevered length of the cantilevered end is greater than the protruding length of the drainage cone, the inner and outer side walls of the diverter sleeve are provided with a first spiral channel, and the fixed end of the diverter sleeve is provided with a group of diverter channels respectively connected to the first spiral channel.

[0006] The overhanging end of the diverter sleeve extends from the fixed end to the outside of the feed port.

[0007] The drainage cone is provided with a second spiral channel.

[0008] The rotating shaft is provided with a shaft sleeve and a shaft gasket located between the shaft sleeve and the impeller, the shaft gasket abuts against the front end of the shaft sleeve and is arranged with a gap with the hub of the impeller, the stuffing box is sleeved on the outside of the shaft sleeve and the shaft gasket, stuffing is arranged between the stuffing box and the shaft sleeve, a limiting ring sleeved on the shaft gasket is nested in the stuffing box, a shaft sealing water inlet hole is provided on the stuffing box, a group of water holes connected with the shaft sealing water inlet hole are provided on the limiting ring, the inner wall of the limiting ring is arranged with a gap with the shaft gasket, and the gap between the limiting ring and the shaft gasket and the gap between the limiting ring and the hub form a slurry resistance channel.

[0009] The impeller is provided with a group of water spray holes whose water outlet ends are located on the drainage cone, the water inlet ends of the water spray holes are located on the hub of the impeller, and the water inlet ends are matched with the impact resistance channel.

[0010] A buffer cavity is arranged between the water inlet and outlet of the water spray hole, the water outlet direction of the water outlet is arranged perpendicular to the conical surface of the drainage cone, and a plurality of water outlets are arranged around the rotating axis of the impeller.

[0011] The feed end face is provided with an external threaded convex ring, the inner wall of the diverter sleeve is provided with an internal thread matching the external threaded convex ring, the diverter sleeve is detachably connected to the impeller by means of the cooperation with the external threaded convex ring, and the external threaded convex ring is provided with a notch matching the diverter channel.

[0012] The diverter sleeve is of a hyperbolic structure.

[0013] The beneficial effects of the present invention are:

[0014] The present invention adopts a method of arranging a drainage cone and a diverter sleeve on the feed end face of the impeller, wherein the inner and outer side walls of the diverter sleeve are respectively provided with a first spiral channel, and a diverter channel is opened on the fixed end of the diverter sleeve. The diverter sleeve separates the slurry entering the impeller along the feed port of the impeller, and diverts the slurry by means of the first spiral channels on the inner and outer side walls, so that the slurry forms a laminar flow, reduces the formation of turbulence, and thus improves the conveying performance of the slurry pump. The diversion of the diverter sleeve can also reduce the direct impact of the slurry on the feed end face; the slurry inside and outside the diverter sleeve is connected by means of the diverter channel, and the slurry inside the diverter channel can also be decompressed to the outside of the diverter channel by means of the diverter channel. During the decompression process of the slurry, no frontal impact is generated with the feed end face, thereby further reducing the wear of the impeller;

[0015] The drainage cone contacts the slurry inside the diverter sleeve with a conical structure, and the contact area gradually increases, so that the slurry gradually disperses to the surroundings, further reducing the frontal impact of the slurry on the feed end face of the impeller;

[0016] A second spiral channel is provided on the drainage cone, and the second spiral channel drains the slurry near the drainage cone to reduce the impact on the feed end face. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 Sectional view along AA direction;

[0019] Figure 3 for Figure 2 A magnified view of the part B in the middle;

[0020] Figure 4 for Figure 3 A magnified view of the local D in the middle;

[0021] Figure 5 for Figure 1 CC view of the middle impeller;

[0022] Figure 6 It is the assembly drawing of the external threaded convex ring and the diverter sleeve;

[0023] In the accompanying drawings, 1, pump body, 2, impeller, 3, hub, 4, rotating shaft, 5, stuffing box, 6, feed end face, 7, feed port, 8, diverter sleeve, 9, drainage cone, 10, fixed end, 11, overhang end, 12, first spiral channel, 13, diverter channel, 14, second spiral channel, 15, sleeve, 16, rotating shaft gasket, 17, stuffing, 18, limiting ring, 19, shaft seal water inlet hole, 20, water hole, 21, impact channel, 22, water spray hole, 2201, water outlet end, 2202, water inlet end, 2203, buffer chamber, 23, external threaded convex ring, 24, notch, 25, slurry outlet. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0025] Specific implementation examples Figure 1 , Figure 2 and Figure 5As shown, the present invention relates to a high-efficiency and high-output slurry pump, comprising an impeller 2 arranged in a pump body 1, a rotating shaft 4 connected to a hub 3 of the impeller 2 and used for driving the impeller 2 to rotate, and a stuffing box 5 arranged on the rotating shaft 4 for preventing leakage of the pump body 1, a feed end face 6 and a feed port 7 located in front of the feed end face 6 are arranged on the impeller 2, a slurry outlet 25 is arranged on the pump body 1, a diverter sleeve 8 coaxially arranged with the feed port 7 and a guide cone 9 located in the diverter sleeve 8 are arranged on the feed end face 6, the guide cone 9 protrudes toward the feed port 7, a fixed end 10 of the diverter sleeve 8 is fixedly connected to the feed end face 6, and the cantilevered length of the cantilevered end 11 is greater than the protruding length of the guide cone 9, a first spiral channel 12 is arranged on the inner and outer side walls of the diverter sleeve 8, and a group of diverter channels 13 respectively connected to the first spiral channel 12 are opened on the fixed end 10 of the diverter sleeve 8.

[0026] Among them, the diameter of the fixed end 10 of the diverter sleeve 8 is larger than the diameter of the cantilevered end 11. Specifically, the diverter sleeve 8 is a hyperbolic structure, so that the diverter sleeve 8 can evenly distribute the impact force of the slurry when receiving the slurry, thereby reducing the wear of the diverter sleeve 8 caused by the slurry.

[0027] The rotation of the impeller 2 generates centrifugal force, the slurry is accelerated and thrown out from the center of the impeller 2 to the pump body 1, the slurry is discharged along the slurry outlet of the pump body 1, a low-pressure area is formed in the center of the impeller 2, and the slurry outside the pump body 1 enters the impeller 2 through the feed port 7. The slurry pump is provided with a diversion cone 9 and a diverter sleeve 8 on the feed end face 6 of the impeller 2, wherein the diverter sleeve 8 separates the slurry entering the impeller feed port 7, and the first spiral channel 12 on the side wall of the flow sleeve 8 diverts the slurry into the impeller 2, and the slurry flows inside and outside the diverter sleeve 8 to form a laminar flow, reduce some turbulence, make the slurry flow velocity evenly distributed, and improve the slurry The conveying performance of the pump can also reduce the direct impact of the slurry on the feed end face 6, reduce the wear of the feed end face 6, and help to extend the service life of the impeller 2; a diverter channel 13 is opened on the fixed end 10 of the diverter sleeve 8, and the slurry is guided to the diverter channel 13 along the first spiral channel 12, so that the slurry inside and outside the diverter sleeve 8 is connected, and the slurry inside the diverter sleeve 8 can be discharged from the diverter channel 13 to the outside of the diverter sleeve 8 and thrown out with the rotation of the impeller 2; when a pressure difference is generated inside and outside the diverter sleeve 8, the slurry is depressurized along the diverter channel 13 to prevent the slurry from flowing back along the feed port 7 and affecting the output efficiency.

[0028] Furthermore, the cantilevered end 11 of the diverter sleeve 8 extends from the fixed end 10 to the outside of the feed port 7, so that the diverter sleeve 8 contacts the slurry that is about to pass through the feed port 7 in advance for drainage, and at the same time induces the bubbles in the slurry to help them smoothly enter the impeller 2, preventing the bubbles from obstructing the entry of the slurry outside the pump body 1, thereby further improving the output efficiency of the slurry pump.

[0029] Preferably, Figure 3 , Figure 6 As shown, an external threaded convex ring 23 is provided on the feed end face 6, and an internal thread matching the external threaded convex ring 23 is provided on the inner wall of the diverter sleeve 8. The diverter sleeve 8 realizes a detachable connection with the impeller 2 by means of the cooperation with the external threaded convex ring 23. The external threaded convex ring 23 is provided with a notch 24 matching the diverter channel 13. When the diverter sleeve 8, which contacts the slurry before the feed end face 6, is worn, it is only necessary to rotate the diverter sleeve 8 to remove it from the impeller 2, and replace it with a new diverter sleeve 8 to continue to extract the slurry. There is no need to frequently replace the entire impeller 2, which can effectively reduce the maintenance cost.

[0030] Further, such as Figure 5 As shown, a second spiral channel 14 is provided on the drainage cone 9. The drainage cone 9 rotates with the impeller 2. The drainage cone 9 contacts the slurry inside the diverter sleeve 8 with a cone-shaped structure to separate the slurry to the surroundings. At the same time, the slurry is drained along the second spiral channel 14, further reducing the impact of the slurry on the feed end face 6 and reducing the wear of the impeller 2.

[0031] The first spiral channel 12 and the second spiral channel 14 are channels formed by spiral protrusions or spiral depressions arranged on the surfaces of the flow dividing sleeve 8 and the flow guiding cone 9 .

[0032] On the other hand, Figure 2 , Figure 3 and Figure 4 As shown, a shaft sleeve 15 and a shaft gasket 16 located between the shaft sleeve 15 and the impeller 2 are provided on the shaft 4, the shaft gasket 16 is abutted against the front end of the shaft sleeve 15 and is set with a gap with the hub 3 of the impeller 2, the stuffing box 5 is sleeved on the outer sides of the shaft sleeve 15 and the shaft gasket 16, a stuffing 17 is provided between the stuffing box 5 and the shaft sleeve 15, a limiting ring 18 sleeved on the shaft gasket 16 is nested in the stuffing box 5, a shaft sealing water inlet hole 19 is provided on the stuffing box 5, a group of water holes 20 connected with the shaft sealing water inlet hole 19 are provided on the limiting ring 18, the inner wall of the limiting ring 18 is set with a gap with the shaft gasket 16, and the gap between the limiting ring 18 and the shaft gasket 16 and the gap between the limiting ring 18 and the hub 3 form a slurry resistance channel 21. During operation, the shaft sealing water inlet hole 19 is connected to the high-pressure water inlet pipe, the water outlet pressure of the high-pressure water inlet pipe is greater than the slurry pressure, and the high-pressure water in the high-pressure water inlet pipe enters between the stuffing box 5 and the limiting ring 18 along the shaft sealing water inlet hole 19, and enters between the limiting ring 18 and the shaft gasket 16 along the water hole 20 on the limiting ring 18 to form high-pressure shaft sealing water, which prevents the pump body 1 from leaking slurry outward and affecting the output efficiency. At the same time, it can also prevent the slurry from contacting with the stuffing 17, prevent the stuffing box 5 and the shaft sleeve 15 from being worn, and improve the working stability of the slurry pump.

[0033] Furthermore, the impeller is provided with a group of water spray holes 22 whose water outlet ends 2201 are located on the guide cone 9 , and the water inlet ends 2202 of the water spray holes 22 are located on the hub 3 of the impeller, and the water inlet ends 2202 are matched with the impact resistance channel 21 .

[0034] A buffer chamber 2203 is provided between the water inlet end 2202 and the water outlet end of the water spray hole 22, the water outlet end 2201 is arranged perpendicularly to the conical surface of the drainage cone 9, and a plurality of water outlet ends 2201 are arranged around the rotating axis of the impeller 2. The water inlet end 2202 is arranged obliquely.

[0035] The water inlet end 2202 is connected to the impact channel 21, and the high-pressure shaft sealing water enters the impact channel 21 and then enters the water inlet end 2202 of the water spray hole 22, and then the high-pressure shaft sealing water enters the buffer chamber 2203. Figure 2 , Figure 3 and Figure 4 As shown, since the water outlet end 2201 of the water spray hole 22 is perpendicular to the conical surface of the drainage cone 9 and deviates from the rotation axis of the impeller 2, the high-pressure shaft sealing water entering the buffer chamber 2203 is thrown out again with the rotation of the impeller 2 and sprayed out from the water outlet end 2201 of the water spray hole 22; since the diverter sleeve 8 has a hyperbolic structure and the drainage cone 9 is located at the center of the diverter sleeve 8, the gap between the drainage cone 8 and the diverter sleeve 9 becomes narrower, and the slurry entering the diverter sleeve 8 has an increased flow velocity and a lower pressure at the narrowed gap, which further promotes the high-pressure shaft sealing water to spray out from the water spray hole 22.

[0036] Due to the high-speed rotation of the impeller 2, after the high-pressure shaft sealing water is sprayed out from the water spray hole 22, a water film is formed along the surface of the impeller 2 under the centrifugal force of the impeller 2 and the extrusion of the slurry to block the slag particles in the slurry. The water film extends from the surface of the drainage cone 9 into the original spiral pumping channel of the impeller 2, thereby reducing the wear of the impeller 2.

Claims

1. A high-efficiency, high-output slurry pump, comprising an impeller (2) disposed in a pump body (1), a rotating shaft (4) connected to a hub (3) of the impeller (2) and used to drive the impeller (2) to rotate, and a stuffing box (5) disposed on the rotating shaft (4) for preventing leakage of the pump body (1), the impeller (2) being provided with a feed end face (6) and a feed port (7) located in front of the feed end face (6), the pump body (1) being provided with a slurry outlet (25), characterized in that: The feed end surface (6) is provided with a flow dividing sleeve (8) coaxially arranged with the feed port (7) and a flow guiding cone (9) located in the flow dividing sleeve (8); the flow guiding cone (9) protrudes toward the feed port (7); the fixed end (10) of the flow dividing sleeve (8) is fixedly connected to the feed end surface (6); the overhanging length of the overhanging end (11) is greater than the protruding length of the flow guiding cone (9); the inner and outer side walls of the flow dividing sleeve (8) are provided with a first spiral channel (12); and the fixed end (10) of the flow dividing sleeve (8) is provided with a group of flow dividing channels (13) respectively connected with the first spiral channels (12); The rotating shaft (4) is provided with a shaft sleeve (15) and a shaft washer (16) located between the shaft sleeve (15) and the impeller (2); the shaft washer (16) abuts against the front end of the shaft sleeve (15) and is provided with a gap with the hub (3) of the impeller (2); the stuffing box (5) is sleeved on the outer side of the shaft sleeve (15) and the shaft washer (16); a stuffing (17) is provided between the stuffing box (5) and the shaft sleeve (15); and a stuffing (17) is nested in the stuffing box (5) and is sleeved on the rotating shaft. A flow limiting ring (18) on the shaft gasket (16), a shaft sealing water inlet hole (19) being provided on the stuffing box (5), a group of water holes (20) being connected to the shaft sealing water inlet hole (19) being provided on the flow limiting ring (18), an inner wall of the flow limiting ring (18) being provided with a gap with the shaft gasket (16), and a gap between the flow limiting ring (18) and the shaft gasket (16) and a gap between the flow limiting ring (18) and the hub (3) forming a slurry resistance channel (21); The impeller (2) is provided with a group of water spray holes (22) whose water outlet ends (2201) are located on the drainage cone (9); the water inlet ends (2202) of the water spray holes (22) are located on the hub (3) of the impeller (2), and the water inlet ends (2202) are matched with the impact resistance channel (21).

2. A high-efficiency and high-output slurry pump according to claim 1, characterized in that: The overhanging end (11) of the diverter sleeve (8) extends from the fixed end (10) to the outside of the feed port (7).

3. A high-efficiency and high-output slurry pump according to claim 1, characterized in that: The drainage cone (9) is provided with a second spiral channel (14).

4. A high-efficiency and high-output slurry pump according to claim 1, characterized in that: A buffer chamber (2203) is provided between the water inlet end (2202) and the water outlet end (2201) of the water spray hole (22); the water outlet direction of the water outlet end (2201) is arranged perpendicular to the conical surface of the drainage cone (9); and a plurality of water outlet ends (2201) are arranged around the rotation axis of the impeller (2).

5. A high-efficiency and high-output slurry pump according to claim 1, characterized in that: The feed end face (6) is provided with an external threaded protruding ring (23), the inner wall of the diverter sleeve (8) is provided with an internal thread matching the external threaded protruding ring (23), the diverter sleeve (8) is detachably connected to the impeller (2) by means of the cooperation with the external threaded protruding ring (23), and the external threaded protruding ring (23) is provided with a notch (24) matching the diverter channel (13).

6. A high-efficiency and high-output slurry pump according to claim 1, characterized in that: The diverter sleeve (8) has a hyperbolic structure.

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