High-efficiency large-caliber feeding slurry pump

Abstract

The invention discloses a high-efficiency large-caliber feeding slurry pump, and relates to the technical field of slurry pumps, the high-efficiency large-caliber feeding slurry pump comprises a pump shell, a volute fixedly connected through a bolt is arranged in the pump shell, an impeller is mounted in the volute, a feeding pipeline and a discharging pipeline which are communicated with the volute are arranged on the pump shell, and a pump shaft coaxially and fixedly connected with the impeller is arranged at one end of the pump shell; through cooperation of the embedded groove, the O-shaped sealing strip and the protruding block, the attaching sealing performance of the front volute and the rear volute is enhanced, the sealing reliability is improved, and then the functions of preventing volute leakage and guaranteeing the stable pressure of a pump body can be achieved; the staggered blocks are matched with the springs and the water inlet holes, liquid is guided into the telescopic grooves through the water inlet holes, the staggered blocks are abutted through liquid pressure so that the two staggered blocks can be tightly attached, the springs can ensure that the staggered blocks cannot shake greatly even under the vibration condition, the attaching firmness of the front volute and the rear volute is enhanced, the anti-vibration capacity is improved, and the service life of the front volute and the rear volute is prolonged. And therefore, volute looseness caused by equipment vibration can be avoided.

Description

Technical Field

[0001] This invention relates to the field of slurry pump technology, and in particular to a high-efficiency slurry pump with a large-diameter feed port. Background Technology

[0002] Slurry pumps are key equipment for conveying slurry containing solid particles and are widely used in mining, metallurgy, coal, chemical and other industries. Existing slurry pump casings are mainly divided into two types: split-type and integrated-type. The split-type casing consists of two halves installed on the front and rear pump casings respectively. The two casings are then fastened together to form a complete casing structure. However, this installation method is prone to leakage if the front and rear pump casings are not properly tightened, or if vibrations during operation cause the bolts to loosen. This not only pollutes the working environment but also leads to a drop in pump pressure, affecting conveying efficiency. Furthermore, the current slurry pump's feed structure typically directs the liquid directly onto the impeller. The high-speed flowing slurry exerts a direct and continuous impact on the impeller, accelerating impeller wear, shortening its service life, and even causing impeller damage, thus affecting normal equipment operation. Therefore, improvements are needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency, large-diameter feed slurry pump.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency, large-diameter feed slurry pump, comprising a pump casing, a volute fixedly connected by bolts inside the pump casing, an impeller installed inside the volute, a feed pipe and a discharge pipe connected to the volute on the pump casing, a pump shaft fixedly connected coaxially to the impeller at one end of the pump casing, the volute being divided into a front volute and a rear volute, a sealing assembly being provided between the opposite surfaces of the front volute and the rear volute, and a flange connecting a flared pipe at the end of the feed pipe away from the pump casing, the flared pipe containing a flow diversion assembly.

[0005] Preferably, an mounting sleeve is fitted onto the pump shaft, and a bracket is fixed to the mounting sleeve by bolts. One end of the bracket is bolted to one end face of the pump casing.

[0006] Preferably, the diversion assembly includes an inner sleeve fitted onto the inner wall of the flared tube, with multiple diversion plates fixed at equal intervals along the axial side of the inner sleeve. The diversion plates are spiral-shaped, and a ring of diversion tubes is fixed to the circumference of the outer wall of the inner sleeve. The flared tube gradually expands outward toward the end away from the feed pipe.

[0007] Preferably, the diversion pipe has a honeycomb cross-section in the radial direction, and an outer flange is fixedly connected to one end of the diversion pipe. The outer flange is connected to a flange at one end of the flared pipe.

[0008] Preferably, the sealing assembly includes an embedded groove formed on the opposing surfaces of the front and rear volutes, an O-ring sealing strip fixedly connected in the embedded groove, a protrusion corresponding to the embedded groove fixedly connected on the opposing surfaces of the rear and front volutes, and two staggered blocks symmetrically arranged on the opposing surfaces of the front and rear volutes at the lower ends of the protrusions and the O-ring sealing strip, the two staggered blocks interlocking with each other.

[0009] Preferably, the two interlaced blocks are arranged as two mirror-image triangular blocks. The front and rear volutes have telescopic grooves for the extension and retraction of the interlaced blocks. A spring is provided in the telescopic groove, and one end of the spring is fixedly connected to the interlaced block.

[0010] Preferably, both the front and rear volutes have water inlet holes on their inner walls that connect to the telescopic grooves and are located on the inner wall of the end away from the staggered block.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention enhances the sealing performance of the front and rear volutes through the cooperation of the embedded groove, O-ring seal, and protrusion, improving sealing reliability and thus preventing volute leakage and ensuring stable pump pressure. Through the cooperation of the staggered block, spring, and water inlet, the water inlet guides liquid into the expansion groove, and the liquid pressure presses against the staggered block, ensuring a tight fit between the two blocks. The spring ensures that the staggered block will not wobble significantly even under vibration, reinforcing the fit between the front and rear volutes and improving vibration resistance. This further prevents volute loosening due to equipment vibration and further prevents leakage. The pump's functions include: through the cooperation of the flared pipe, inner sleeve, and flow divider, it diverts and buffers the slurry, reducing the impact of the slurry on the impeller and extending its service life. This protects the impeller and prevents rapid wear and damage. Furthermore, through the cooperation of the flow divider and the outer flange, it achieves secondary flow diversion and buffering, ensuring stable installation of the flow divider assembly. This improves the flow diversion effect and equipment operational stability, enabling smooth slurry guidance and preventing direct impact on the impeller. Ultimately, it solves the problems of easy leakage in existing split-type volute pumps and rapid impeller wear caused by direct slurry impact, improving the slurry pump's operational stability and conveying efficiency, and extending the overall service life of the equipment. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a first-view schematic diagram of the overall structure of the present invention; Figure 2 This is a second-view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the front volute of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structural section at point A in the middle; Figure 5 This is a first-view schematic diagram of the overall structure of the flared tube of the present invention; Figure 6 This is a second-view schematic diagram of the overall structure of the flared tube of the present invention; The numbers in the diagram are: 1. Pump casing; 2. Front volute; 3. Rear volute; 4. Feed pipe; 5. Discharge pipe; 6. Impeller; 7. Pump shaft; 8. Mounting sleeve; 9. Bracket; 10. Inner sleeve; 11. Diverter plate; 12. Diverter pipe; 13. Outer flange; 14. Embedded groove; 15. O-ring seal; 16. Interlocking block; 17. Expansion groove; 18. Spring; 19. Water inlet; 20. Protrusion; 21. Flared pipe. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] Example: See Figures 1 to 6This invention discloses a high-efficiency, large-diameter feed slurry pump, comprising a pump casing 1, a volute fixed to the pump casing 1 by bolts, an impeller 6 installed inside the volute, a feed pipe 4 and a discharge pipe 5 connected to the pump casing 1, a pump shaft 7 coaxially fixed to the impeller 6 at one end of the pump casing 1, the volute being divided into a front volute 2 and a rear volute 3, with a sealing assembly between the opposing surfaces of the front volute 2 and the rear volute 3, and a flange connecting the end of the feed pipe 4 away from the pump casing 1 to a flared pipe 21, which contains a flow diversion assembly; the pump casing 1 is made of cast iron, which provides high structural strength and impact resistance, enabling it to withstand the high pressure and impact during slurry transportation, thus extending the overall service life of the equipment; the front volute... The front and rear volute casings 2 and 3 are made of plastic, which is lightweight, corrosion-resistant, and easy to process and mold, while also reducing the overall weight of the equipment and simplifying installation. The impeller 6 is made of wear-resistant alloy steel, which has high hardness and good wear resistance, able to withstand the impact and wear of high-speed slurry, extending its service life. The pump shaft 7 is made of 45# steel, which has high strength and good toughness, able to withstand the torque during high-speed operation, preventing deformation or breakage. The flared pipe 21 is made of stainless steel, which has strong corrosion resistance, stable structure, and can enlarge the feed inlet diameter. The pump casing 1 provides a stable mounting base for the slurry pump, while the volute provides the working chamber for the impeller 6. The feed pipe 4 and discharge pipe 5 facilitate slurry feeding and discharging. The pump shaft 7 drives the impeller 6. The separate design of the front and rear volutes 2 and 3 facilitates maintenance and replacement. The sealing assembly ensures the sealing performance of the volute. The flared pipe 21 and the slurry diversion assembly achieve slurry diversion and buffering, improving the ease of installation and operational stability of the equipment, thus enabling efficient and stable slurry transportation. These components together form the basic framework of the device, providing core support for the coordinated operation of subsequent components and effectively addressing the core pain points of existing slurry pumps. The pump shaft 7 is fitted with... Mounting sleeve 8 is bolted to bracket 9, one end of bracket 9 being bolted to one end face of pump casing 1. Mounting sleeve 8 and bracket 9 are made of carbon steel, which provides high structural strength and load-bearing capacity, stably supporting pump shaft 7 and preventing it from shaking or shifting during high-speed operation. Mounting sleeve 8 fits into pump shaft 7, providing a mounting carrier for bracket 9. Bracket 9 is bolted to mounting sleeve 8 and pump casing 1 respectively, achieving stable support for pump shaft 7, preventing shaking or shifting during high-speed operation, avoiding friction between impeller 6 and the inner wall of volute, improving the operational stability of pump shaft 7, and thus ensuring smooth equipment operation and extending component lifespan.The diversion assembly includes an inner sleeve 10 fitted into the inner wall of the flared pipe 21. Multiple diversion plates 11 are equidistantly fixed to the inner wall of the inner sleeve 10 along its axial side. The diversion plates 11 are spiral-shaped. A ring of diversion pipes 12 is fixed to the outer circumference of the inner sleeve 10. The flared pipe 21 gradually widens outwards towards the end furthest from the feed pipe 4. The inner sleeve 10, diversion plates 11, and diversion pipes 12 are made of stainless steel. The stainless steel material provides strong corrosion resistance, prevents rusting, and allows them to adapt to the harsh conveying environment of slurry, while ensuring stable diversion performance. The outward expansion design of the flared pipe 21 increases the feed inlet diameter and slows the slurry flow rate. The inner sleeve 10 provides a stable mounting surface for the diversion plates 11 and diversion pipes 12. The spiral diversion plates 11 divide the slurry into multiple spiral water flows, achieving initial diversion buffering. The ring-shaped diversion pipes 12 further disperse the impact force of the slurry. The impact of slurry on impeller 6 is reduced, improving the diversion effect and feeding efficiency, thereby protecting impeller 6 and preventing its rapid wear. The diversion pipe 12 has a honeycomb cross-section radially, with an externally flared flange 13 fixed to one end, which connects to a flange at one end of the flared pipe 21. The externally flared flange 13 is made of carbon steel, ensuring a strong connection and high load-bearing capacity, guaranteeing a stable connection between the diversion assembly and the flared pipe 21. The honeycomb cross-section of the diversion pipe 12 allows for secondary diversion and buffering of the slurry, further reducing slurry velocity and impact force. The externally flared flange 13 ensures a secure connection between the diversion pipe 12 and the flared pipe 21, preventing the diversion assembly from loosening or falling off under slurry impact, improving the installation stability and diversion effect of the diversion assembly, and thus enabling smooth slurry guidance and stable equipment operation.

[0015] In this invention, the sealing assembly includes an embedded groove 14 formed on the opposing surfaces of the front volute 2 and the rear volute 3. An O-ring sealing strip 15 is fixedly connected within the embedded groove 14. A protrusion 20 corresponding to the embedded groove 14 is fixedly connected to the opposing surfaces of the rear volute 3 and the front volute 2. Two interlocking blocks 16 are symmetrically arranged at the lower ends of the protrusions 20 and the O-ring sealing strip 15 on the opposing surfaces of the front volute 2 and the rear volute 3. The two interlocking blocks 16 interlock and engage with each other. The O-ring sealing strip 15 is made of nitrile rubber, which provides good sealing performance, is oil-resistant and wear-resistant, and can effectively prevent volute leakage. The interlocking blocks 16 are made of plastic, which is lightweight and has good toughness. The inner groove 14 provides installation space for the O-ring seal 15. The protrusion 20 is embedded in the inner groove 14 to compress the O-ring seal 15, achieving initial sealing of the volute. The two interlocking blocks 16 interlock with each other, reinforcing the fit between the front volute 2 and the rear volute 3, preventing them from loosening, and improving the sealing reliability and fit of the volute. This enables the volute to prevent leakage and ensure stable pump pressure. The two interlocking blocks 16 are two mirror-shaped triangular blocks. The front volute 2 and the rear volute 3 have telescopic grooves 17 for the extension and retraction of the interlocking blocks 16. A spring 18 is installed in the telescopic groove 17. One end of the spring 18 is connected to... The staggered block 16 is fixedly connected; the spring 18 is made of spring steel, which has good elasticity and high fatigue strength, and can apply a stable elastic force to the staggered block 16 for a long time, ensuring that the staggered block 16 does not wobble significantly during vibration; the mirrored triangular block structure of the staggered block 16 facilitates interlocking, the expansion groove 17 provides expansion space for the staggered block 16, and the spring 18 applies an elastic force to the staggered block 16, ensuring that the staggered block 16 is tightly locked, and will not wobble significantly even when the equipment vibrates, further strengthening the fit between the front volute 2 and the rear volute 3, improving the vibration resistance of the equipment, and thus preventing the volute from loosening due to vibration and further preventing leakage. The function of the exposed volute is as follows: Both the front volute 2 and the rear volute 3 have a connecting expansion groove 17 on their inner walls, with a water inlet 19 on the inner wall of the end furthest from the staggered block 16. The water inlet 19 is located on the front volute 2 and the rear volute 3, which are made of plastic, making them lightweight and corrosion-resistant, ensuring that the water inlet 19 is not easily clogged or damaged. The water inlet 19 can guide the slurry into the expansion groove 17, using the slurry pressure to press against the staggered block 16, further tightening the two staggered blocks 16 and enhancing their locking stability. Combined with the spring 18, this further improves the equipment's vibration resistance and the volute's sealing performance, thereby preventing volute leakage and ensuring stable equipment operation.

[0016] Working principle: In this embodiment, the present invention also proposes a method for using a high-efficiency, large-diameter feed slurry pump, including the following steps: Step 1: First, install the front volute 2 and the rear volute 3 on the front pump housing and the rear pump housing 1 respectively. Then, make the opposite surfaces of the front volute 2 and the rear volute 3 fit together. The protrusion 20 is embedded in the inner groove 14 and squeezes the O-ring sealing strip 15. The two interlocking blocks 16 interlock and engage with each other. The spring 18 in the telescopic groove 17 applies an elastic force to the interlocking blocks 16 to ensure that the interlocking blocks 16 fit tightly. Then, fasten the front pump housing and the rear pump housing with bolts to complete the assembly and sealing of the volute. Step 2: Fit the inner sleeve 10 onto the inner wall of the flared pipe 21 to ensure that the flow divider 11 is evenly distributed along the inner wall of the inner sleeve 10. Fix the flow divider 12 to the outer wall of the inner sleeve 10. Connect the flow divider to one end flange of the flared pipe 21 through the outer flange 13 to fix the flow divider assembly. Then connect the flared pipe 21 to the flange at the end of the feed pipe 4 away from the pump casing 1. Step 3: Fit the mounting sleeve 8 onto the pump shaft 7, fix the bracket 9 onto the mounting sleeve 8 with bolts, and then fix one end of the bracket 9 to one end face of the pump housing 1 with bolts to achieve stable support for the pump shaft 7. Step 4: The slurry enters through the flared pipe 21, which slows down the slurry flow rate. The spiral diverter 11 on the inner wall of the inner sleeve 10 divides the slurry into multiple spiral water streams, achieving initial diversion and buffering. The honeycomb diverter 12 on the outer wall of the inner sleeve 10 performs secondary diversion and buffering of the slurry, further reducing the impact force of the slurry and guiding the slurry to flow smoothly into the impeller 6 inside the volute. Step 5: When the equipment is running, the water inlet 19 guides the slurry into the expansion tank 17. The slurry pressure presses against the staggered blocks 16, making the two staggered blocks 16 fit together more tightly. The spring 18 ensures that the staggered blocks 16 do not shake too much during vibration. The O-ring sealing strip 15, together with the protrusion 20 and the embedded groove 14, achieves volute sealing. The pump shaft 7 drives the impeller 6 to rotate at high speed, and transports the diverted slurry out through the discharge pipe 5.

[0017] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency, large-diameter feed slurry pump, comprising a pump casing (1), a volute fixedly connected to the pump casing (1) by bolts, an impeller (6) installed inside the volute, a feed pipe (4) and a discharge pipe (5) connected to the volute on the pump casing (1), and a pump shaft (7) coaxially fixedly connected to the impeller (6) at one end of the pump casing (1), characterized in that: The volute is divided into a front volute (2) and a rear volute (3). A sealing assembly is provided between the opposite surfaces of the front volute (2) and the rear volute (3). A flange is connected to the end of the feed pipe (4) away from the pump housing (1) and a flow diversion assembly is provided inside the flared pipe (21).

2. The high-efficiency, large-diameter feed slurry pump according to claim 1, characterized in that:

2. An installation sleeve (8) is fitted on the pump shaft (7), and a bracket (9) is fixed to the installation sleeve (8) by bolts. One end of the bracket (9) is fixed to one end face of the pump casing (1) by bolts.

3. A high-efficiency, large-diameter feed slurry pump according to claim 1, characterized in that: The diversion assembly includes an inner sleeve (10) fitted onto the inner wall of the flared tube (21). Multiple diversion plates (11) are fixedly attached to the inner wall of the inner sleeve (10) at equal intervals along the axial side. The diversion plates (11) are spiral in shape. A ring of diversion tubes (12) is fixedly attached to the outer circumference of the inner sleeve (10). The flared tube (21) gradually expands outward toward the end away from the feed pipe (4).

4. A high-efficiency, large-diameter feed slurry pump according to claim 3, characterized in that: The diversion pipe (12) has a honeycomb cross-section in the radial direction. One end of the diversion pipe (12) is fixed with an externally expanding flange (13), which is connected to a flange at one end of the flared pipe (21).

5. A high-efficiency, large-diameter feed slurry pump according to claim 1, characterized in that: The sealing assembly includes an embedded groove (14) formed on the opposite surfaces of the front volute (2) and the rear volute (3). An O-ring seal strip (15) is fixedly connected in the embedded groove (14). A protrusion (20) corresponding to the embedded groove (14) is fixedly connected on the opposite surfaces of the rear volute (3) and the front volute (2). Two interlocking blocks (16) are symmetrically arranged on the opposite surfaces of the front volute (2) and the rear volute (3) at the lower ends of the protrusion (20) and the O-ring seal strip (15). The two interlocking blocks (16) interlock and engage with each other.

6. A high-efficiency, large-diameter feed slurry pump according to claim 5, characterized in that: The two interlaced blocks (16) are two mirror-arranged triangular blocks. The front volute (2) and the rear volute (3) have telescopic grooves (17) for the extension and retraction of the interlaced blocks (16). A spring (18) is provided in the telescopic groove (17), and one end of the spring (18) is fixedly connected to the interlaced block (16).

7. A high-efficiency, large-diameter feed slurry pump according to claim 5, characterized in that: Both the front volute (2) and the rear volute (3) have water inlet holes (19) on the inner walls of the connecting expansion groove (17) away from the inner wall of the staggered block (16).

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