High-efficiency large-diameter feeding slurry pump

Abstract

The present application belongs to the field of slag slurry pump, and particularly relates to a high-efficiency large-diameter feeding slag slurry pump, which comprises a pump body, an impeller and a feeding pipeline arranged in the pump body, the feeding end of the pump body is connected with a connecting pipe through the feeding pipeline, the feeding end surface of the impeller is connected with the fixed end of a shunt sleeve, the fixed end of the shunt sleeve is provided with a shunt channel communicated with the flow channel of the impeller, and the key point is that a flow guide cone is further arranged on the feeding end surface, the flow guide cone is located in the shunt sleeve, the top of the flow guide cone is provided with a center rod, and the overhanging end of the center rod is overhangingly arranged in the feeding pipeline in the reverse direction of the feeding direction. The slag slurry pump can optimize the flow path of the slag slurry after entering the feeding pipeline, slow down the shock, and improve the output efficiency.

Description

Technical Field

[0001] This invention belongs to the field of slurry pumps, specifically relating to a high-efficiency slurry pump with a large-diameter feed port. Background Technology

[0002] The slurry inlet and outlet of a slurry pump are usually vertically aligned. The axial direction of the slurry inlet is perpendicular to the feed face of the impeller, while the axial direction of the slurry outlet is parallel to the feed face of the impeller. The slurry enters the pump through the slurry inlet and then directly impacts the feed face of the impeller through the feed inlet. This can easily cause wear on the feed face, affecting its impact resistance and shortening its service life. On the other hand, turbulence is generated at the feed inlet of the impeller, preventing the slurry from being properly discharged from the pump body as the impeller rotates, thus affecting output efficiency.

[0003] Patent document CN119146094A discloses a high-efficiency, high-output slurry pump. By installing a diverting sleeve and a guide cone on the impeller feed end face, the aforementioned problems are solved, effectively reducing the impact and wear of the slurry on the impeller, extending the impeller's service life, and improving output efficiency. However, in practical applications, it has been found that because the connecting pipe near the slurry pump feed pipe is usually bent, the material in the feed pipe is prone to violent vibrations at high output rates. This not only impacts the feed pipe but also hinders further improvement in output efficiency. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a high-efficiency, large-diameter feed slurry pump that optimizes the flow path of slurry after it enters the feed pipe, reduces oscillation, and improves output efficiency.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A high-efficiency, large-diameter feed slurry pump includes a pump body and an impeller and a feed pipe disposed within the pump body. The feed end of the pump body is connected to a connecting pipe via the feed pipe. The feed end face of the impeller is connected to the fixed end of a flow divider sleeve. The fixed end of the flow divider sleeve is provided with a flow divider channel communicating with the impeller flow channel. Crucially, a flow guide cone is also provided on the feed end face. The flow guide cone is located inside the flow divider sleeve. A central rod is provided at the top of the flow guide cone. The cantilevered end of the central rod extends into the feed pipe in the opposite direction of the feed direction.

[0007] The feed pipe has a flared shape, and the diameter of the discharge end of the feed pipe is smaller than the diameter of the feed end. The discharge end of the feed pipe is connected to the pump body, and the feed end is connected to the connecting pipe.

[0008] The feed pipe is provided with an inner liner ring, and the inner wall of the inner liner ring is provided with a spiral channel, the spiral direction of which is the same as the spiral direction of the impeller.

[0009] The inner lining ring is a split structure, including a first sub-ring and a set of second sub-rings arranged sequentially along the circumference. The first sub-ring and the second sub-ring are connected end to end in sequence, and the first sub-ring and the second sub-ring are detachably connected to the feed pipe by means of screws.

[0010] The contact surfaces between the second sub-rings are all arranged along the radial line of the inner lining ring, and the contact surfaces of the first sub-rings are parallel or arranged at an angle α, with the angle α located on the outside of the inner lining ring.

[0011] The central rod is provided with a waist section, which is located at the discharge end of the feed pipe. The waist section is provided with a spiral protrusion, and the spiral direction of the spiral protrusion is the same as that of the impeller.

[0012] The beneficial effects of this invention are:

[0013] This invention employs a central rod at the top of the guide cone, with its cantilevered end extending into the feed pipe in the opposite direction to the feed direction. This cantilevered end of the central rod, protruding into the feed pipe, allows it to contact the slurry output from the connecting pipe before it enters the pump body, pre-guiding the slurry. The central rod and the feed pipe together form an annular flow channel, creating a clamping effect on the slurry, dispersing it within the annular flow channel, reducing the amplitude of slurry vibration, suppressing radial sloshing, and allowing the slurry output from the curved connecting pipe to quickly reach a stable state. This reduces the impact caused by sudden flow changes, thereby mitigating the impact of the slurry on the feed pipe and effectively extending its service life. Furthermore, the stable slurry entering the impeller effectively reduces kinetic energy loss and increases the effective conveying capacity per unit time.

[0014] The feed pipe has a funnel-shaped structure, which can ensure the cross-sectional area of ​​the flow channel and increase the slurry feed rate per unit time. The diameter of the feed pipe gradually decreases along the conveying direction of the slurry, which can slow down the slurry that enters the feed pipe at high speed during the flow process. The slurry smoothly transitions to the feed end of the pump body in the feed pipe, ensuring stable feeding.

[0015] The feed pipe is equipped with an inner lining ring, and the inner wall of the inner lining ring is provided with a spiral channel. The spiral direction of the spiral channel is the same as that of the impeller. During the flow process, the slurry generates a pre-swirling flow along the spiral channel, so that the slurry generates an initial velocity in the same direction as the impeller rotation before entering the impeller. This helps to reduce the energy loss of the impeller and can further suppress the radial oscillation of the slurry. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0018] Figure 3 This is a schematic diagram of the assembly of the impeller with the flow divider sleeve and the flow guide cone;

[0019] Figure 4 This is a schematic diagram of the flow distribution channel on the flow distribution sleeve;

[0020] Figure 5 This is a schematic diagram of the inner lining ring.

[0021] In the attached diagram, 1 is the pump body, 2 is the impeller, 201 is the feed end face, 3 is the feed pipe, 4 is the connecting pipe, 5 is the diversion sleeve, 501 is the diversion channel, 6 is the inner lining ring, 601 is the first sub-ring, 602 is the second sub-ring, 603 is the spiral channel, 7 is the diversion cone, 701 is the center rod, 702 is the waist section, and 703 is the spiral protrusion. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] Specific implementation examples Figure 1 As shown, this invention relates to a high-efficiency, large-diameter feed slurry pump, comprising a pump body 1, an impeller 2 and a feed pipe 3 disposed within the pump body 1, wherein the feed end of the pump body 1 is connected to a connecting pipe 4 via the feed pipe 3, and the slurry is output from the connecting pipe 4 into the feed pipe 3 and then enters the pump body 1 through the feed pipe 3. Figure 2 , Figure 3 As shown, the feed end face 201 of the impeller 2 is connected to the fixed end of the diverter sleeve 5, as follows. Figure 4As shown, the fixed end of the diversion sleeve 5 is provided with a diversion channel 501 that communicates with the impeller flow channel. The key point is that a diversion cone 7 is also provided on the feed end face 201. The diversion cone 7 is located inside the diversion sleeve 5. A central rod 701 is provided at the top of the diversion cone 7. The cantilever end of the central rod 701 extends into the feed pipe 3 in the opposite direction of the feed direction. The cantilevered end of the center rod 701 extends into the feed pipe 3, allowing it to contact the slurry output from the connector 4 before it enters the pump body 1, thus pre-guiding the slurry. The center rod 701 and the feed pipe 3 work together to form an annular flow channel, creating a clamping effect on the slurry. This disperses the slurry within the annular flow channel, reducing the amplitude of slurry vibration and suppressing radial sloshing. This allows the slurry output from the curved connector 4 to quickly reach a stable state, reducing the impact caused by sudden changes in flow pattern and mitigating the impact of the slurry on the feed pipe 3, effectively extending the service life of the feed pipe. On the other hand, the stable slurry enters the pump body 1 and is driven by the impeller 2 to exit the pump body 1. This eliminates the need to consume the mechanical energy generated by the rotation of the impeller 2 to counteract the slurry vibration, effectively reducing kinetic energy loss and increasing the effective conveying capacity per unit time.

[0024] The feed pipe 3 has a funnel-shaped structure. The diameter of the discharge end of the feed pipe 3 is smaller than the diameter of the feed end. The discharge end of the feed pipe 3 is connected to the pump body 1, and the feed end is connected to the pipe 4. This can ensure the cross-sectional area of ​​the flow channel and increase the slurry feed rate per unit time. The diameter of the feed pipe 3 gradually decreases along the conveying direction of the slurry, which can slow down the slurry that enters the feed pipe 2 at high speed during the flow process. The slurry smoothly transitions to the feed end of the pump body 1 in the feed pipe 2, ensuring stable feeding.

[0025] The feed pipe 3 is equipped with an inner lining ring 6, which is used to withstand the impact and friction of the slurry and extend the service life of the feed pipe 3. The inner wall of the inner lining ring 6 is provided with a spiral channel 603, and the spiral direction of the spiral channel 603 is the same as that of the impeller 2. During the flow process, the slurry generates a pre-swirling flow along the spiral channel 603, so that the slurry generates an initial velocity in the same direction of rotation as the impeller 2 before entering the impeller 2. This helps to reduce the energy loss of the impeller 2 and can further suppress the radial oscillation of the slurry.

[0026] like Figure 5 As shown, the inner lining ring 6 preferably has a split structure. The inner lining ring 6 includes a first sub-ring 601 and a plurality of second sub-rings 602 arranged sequentially along the circumference. The first sub-ring 601 and the second sub-rings 602 abut each other in sequence. The first sub-ring 601 and the second sub-ring 602 are detachably connected to the feed pipe 3 by means of screws. The screw fixing method can realize the quick replacement of the inner lining ring 6. When the first sub-ring 601 or the second sub-ring 602 is worn, the inner lining ring 6 can be partially replaced without replacing the entire feed pipe 3 or the inner lining ring 6.

[0027] In this embodiment, the contact surfaces between the second sub-rings 602 are all arranged along the radial line of the inner lining ring 6. The contact surfaces of the first sub-rings 601 are parallel to each other or at an angle α. In this embodiment, the contact surfaces of the first sub-rings 601 are preferably at an angle α, with the angle α located on the outside of the inner lining ring 6. That is, the inner end of the first sub-ring 601 is wider than the outer end. After removing the screws, the first sub-ring 601 can be pushed and pulled radially inward to separate the first sub-ring 601 from the adjacent second sub-rings 602, making it easy to quickly remove the first sub-ring 601 from the feed pipe 3. After the first sub-ring 601 is removed, it provides operating space for the removal of the second sub-ring 602, thereby facilitating the rapid replacement of the inner lining ring 6.

[0028] like Figure 1 , Figure 2 As shown, a waist section 702 is provided on the upper part of the central rod 701. The diameter of the waist section 702 is smaller than the diameter of the fixed end and the cantilever end of the central rod 701. The waist section 702 is located at the discharge end of the feed pipe 3, providing a flow channel with a large cross-section between the central rod 701 and the discharge end of the feed pipe 3. A spiral protrusion 703 is provided on the waist section 702. The spiral protrusion 703 is coiled on the waist section 702. The spiral direction of the spiral protrusion 703 is the same as the spiral direction of the impeller 2. The spiral protrusion 703 serves as a reinforcing rib of the waist section 702, improving the strength of the waist section 702. It also causes the slurry to form a pre-swirling flow at the discharge end of the feed pipe 3, which is linked with the spiral channel 603 on the feed pipe 3 to improve the pre-swirling effect, suppress turbulence in the slurry in the pump body, and keep the slurry at a stable flow rate and flow state, thereby achieving stable and efficient output of slurry by the impeller.

Claims

1. A high-efficiency, large-diameter feed slurry pump, comprising a pump body (1) and an impeller (2) and a feed pipe (3) disposed within the pump body (1), wherein the feed end of the pump body (1) is connected to a connecting pipe (4) via the feed pipe (3), and the feed end face (201) of the impeller (2) is connected to the fixed end of a diversion sleeve (5), wherein the fixed end of the diversion sleeve (5) is provided with a diversion channel (501) communicating with the impeller flow channel, characterized in that: A flow guide cone (7) is also provided on the feed end face (201). The flow guide cone (7) is located inside the flow divider sleeve (5). A center rod (701) is provided at the top of the flow guide cone (7). The cantilever end of the center rod (701) extends into the feed pipe (3) in the opposite direction of the feed direction. The feed pipe (3) has a flared structure. The diameter of the discharge end of the feed pipe (3) is smaller than the diameter of the feed end. The discharge end of the feed pipe (3) is connected to the pump body (1), and the feed end is connected to the pipe (4). The feed pipe (3) is provided with an inner lining ring (6), and a spiral channel (603) is provided on the inner wall of the inner lining ring (6). The spiral direction of the spiral channel (603) is the same as the spiral direction of the impeller (2). The center rod (701) is provided with a waist section (702), which is located at the discharge end of the feed pipe (3). The waist section (702) is provided with a spiral protrusion (703), and the spiral direction of the spiral protrusion (703) is the same as that of the impeller (2).

2. The high-efficiency, large-diameter feed slurry pump according to claim 1, characterized in that: The inner lining ring (6) is a split structure, including a first sub-ring (601) and a set of second sub-rings (602) arranged sequentially along the circumference. The first sub-ring (601) and the second sub-ring (602) are connected end to end in sequence. The first sub-ring (601) and the second sub-ring (602) are detachably connected to the feed pipe (3) by means of screws.

3. A high-efficiency, large-diameter feed slurry pump according to claim 2, characterized in that: The contact surfaces between the second sub-rings (602) are all arranged along the radial line of the inner lining ring (6), and the contact surfaces of the first sub-rings (601) are parallel or arranged at an angle α, with the angle α located on the outside of the inner lining ring (6).

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