Double-side water inlet horizontal slurry pump and working method thereof

Abstract

The invention discloses a bilateral water inlet horizontal slurry pump and a working method thereof, and relates to the technical field of slurry pumps, the bilateral water inlet horizontal slurry pump comprises a pump shell, the pump shell comprises a volute part, a water inlet pipe connector, a water outlet pipe connector and a connecting port, the volute part is an annular pump sleeve body formed by a wear-resistant metal material, outer protective shells are arranged on the two sides of the volute part in an extending mode, and the outer protective shells are connected with the water inlet pipe connector and the water outlet pipe connector; the water inlet pipe connector communicates with one side wall of the outer protective shell, and the front and rear ends of an inner opening are located on the front and rear sides of the volute part correspondingly. A partition plate is arranged in the middle of the impeller to divide the impeller into two symmetrical blade mounting cavities, and a first liquid inlet and a second liquid inlet are formed in the roots of the two blade mounting cavities correspondingly; the second liquid inlet is arranged forwards, and the outer wall of the sleeve is in clearance fit with a middle hole in the front side wall of the volute part; the rear connecting cover plate is hermetically mounted on the connecting port through a plurality of flange bolts, and the rear connecting cover plate is connected to the front end of the bracket; and the rear protective plate is blocked on the opening of the rear wall of the volute part. The axial load of the main shaft is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of slurry pump technology, and in particular to a horizontal slurry pump with double-sided inlet and its working method. Background Technology

[0002] Horizontal slurry pumps are a type of centrifugal pump specifically designed for conveying slurries containing high concentrations of solid particles, such as mine tailings, power plant ash, river dredging silt, metallurgical slurry, and building material slurry. During use, they are placed directly on a foundation without the need for immersion in water, facilitating maintenance and repair. Due to their strong wear resistance and anti-clogging capabilities, horizontal slurry pumps have become a core piece of equipment for conveying solid-liquid mixtures in heavy industry.

[0003] Existing horizontal slurry pumps typically employ a double-casing design: an inner volute casing and front and rear end plates, and an outer casing consisting of two split casings. The outer casing is vertically split and secured with multiple bolts, with the outlet located tangentially to the volute casing. However, the inlet of these horizontal slurry pumps is typically located in the central hole of the front end plate and installed via an inlet pipe. This front-side inlet method easily causes axial stress on the impeller, which is then transmitted to the main shaft. If a mechanical seal assembly is used, this increases the frictional pressure between the rotating and stationary rings, reducing the seal's lifespan. It also increases the axial load on the bearings within the bearing housing, leading to increased bearing wear.

[0004] To overcome the above problems, a horizontal slurry pump with double-sided water inlet and its working method are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a horizontal slurry pump with double-sided water inlet and its working method. By adopting a double-sided water inlet method, the axial forces on both sides of the impeller are offset, which reduces the axial load on the main shaft and improves the service life of the equipment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses a horizontal slurry pump with dual-sided water inlet, comprising a base, a motor, a bracket, and a bearing housing, characterized in that it further comprises: The pump housing includes a volute, an inlet pipe connector, an outlet pipe connector, and a connection port. The volute is an annular pump sleeve made of wear-resistant metal material. Outer protective shells extend from both sides of the volute. The inlet pipe connector is connected to one side wall of the outer protective shell, and its inner opening is located at the front and rear sides of the volute, respectively. The outlet pipe connector is located at the outer edge of the volute along the tangential direction, and its root is connected to the inner cavity of the volute. An impeller is installed on the shaft end of the main shaft and fits inside the volute. A partition is provided in the middle of the impeller, which divides the inner cavity of the impeller into two symmetrical blade mounting cavities. The root of the two blade mounting cavities is provided with a first liquid inlet and a second liquid inlet, respectively. The second liquid inlet is arranged facing forward and is fitted with the central hole of the outer wall of the sleeve and the front side wall of the volute. A rear connecting cover plate is installed on the connecting port by multiple flange bolts, and the rear connecting cover plate is connected to the front end of the bracket; a mechanical seal is provided on the outside of the through-shaft hole in the middle of the rear connecting cover plate; The rear guard plate seals the opening on the rear wall of the volute, and the central hole of the rear guard plate is clearance-fitted with the outer wall of the sleeve of the first liquid inlet.

[0007] The technical solution of this application focuses on improving the pump casing form of the slurry pump, breaking away from the traditional double pump casing form of existing horizontal slurry pumps, and adopting an integrally molded irregular pump casing, which greatly reduces the difficulty of installation and disassembly, and ensures the water intake requirements on both sides.

[0008] Furthermore, the impeller is coaxially provided with a threaded sleeve at the middle position of the first liquid inlet, and the threaded sleeve is connected to the threaded rod at the end of the main shaft by a left-hand thread.

[0009] Furthermore, it also includes spacer blocks, a plurality of spacer blocks are circumferentially distributed on the back of the rear guard plate, the spacer blocks are spaced between the rear guard plate and the rear connecting cover plate; the two ends of the spacer blocks are respectively fixedly connected to the side walls of the rear guard plate and the rear connecting cover plate.

[0010] Furthermore, two positioning blocks are symmetrically arranged on the rear side wall of the rear connecting cover about the axis of the through hole, and a positioning platform is provided on the top surface of the positioning blocks; two front support arms are symmetrically arranged at the front end of the bracket, and the front support arms are positioned and fixedly connected to the positioning platform by connecting screws.

[0011] Furthermore, an outer water inlet cavity is formed between the front sidewall of the volute and the front outer protective shell; an inner water inlet cavity is formed between the rear protective plate, the rear connecting cover plate and the rear outer protective shell; and the water inlet pipe connector connects the outer water inlet cavity and the inner water inlet cavity simultaneously.

[0012] Furthermore, an inspection port is provided on the front side wall of the outer water inlet chamber, and the inspection port is connected to an inspection cover plate for sealing by flange bolts.

[0013] Furthermore, a threaded hole is provided at the top of the outer edge of the inspection cover, and a lifting ring is threaded into the threaded hole.

[0014] Furthermore, a plurality of reinforcing ribs are provided at intervals on the exposed outer wall of the volute portion, and the reinforcing ribs are arranged along the width direction of the volute portion.

[0015] Furthermore, it also includes cutting ribs, a plurality of which are integrally disposed on the outer wall of the volute portion, and the cutting ribs are located at the position corresponding to the water inlet pipe joint; a plurality of continuous cutting tooth grooves are formed on the outer edge of the cutting ribs.

[0016] Based on the weaknesses discovered during the physical experiment, improvements need to be made to strengthen the volute portion corresponding to the water inlet pipe connector to prevent sudden breakage.

[0017] The present invention also discloses a method for operating a horizontal slurry pump with double-sided water inlet, which is used to pump solid-liquid mixtures using any of the above-mentioned horizontal slurry pumps.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention relates to a dual-inlet horizontal slurry pump. The impeller is housed within a single, integrated pump casing, which forms the front and rear inlet chambers. This design results in a simple, compact, and rationally laid-out structure. Unlike traditional slurry pumps that require a separate front guard plate for sealing, this invention uses an integrated volute front wall to separate the inlet chamber and the impeller chamber, simplifying the structure. The impeller is divided into two symmetrical blade mounting chambers by a partition. Corresponding inlet chambers are located at the root of each blade mounting chamber, forming two parallel-running centrifugal pumps. This increases flow rate, cancels out axial forces on both sides, and reduces the axial force on the main shaft. This dual-inlet horizontal slurry pump reduces the axial load on the main shaft, protects the mechanical seal and bearings, and extends the equipment's service life.

[0019] Furthermore, the threaded connection between the threaded sleeve and the threaded rod at the end of the main shaft ensures a reliable connection without loosening during the equipment's forward rotation. By fixing a spacer block between the rear guard plate and the rear connecting cover plate, the rear guard plate can be installed simultaneously with the rear connecting cover plate. During pump housing installation, the rear guard plate can be directly aligned and pressed against the opening on the rear wall of the volute. The positioning table and the front support arm of the bracket enable rapid positioning and installation of the rear connecting cover plate. The addition of an inspection port and inspection cover plate not only facilitates observation and maintenance but also meets the requirements of the pump housing casting process. The addition of lifting rings facilitates pump housing hoisting. The addition of reinforcing ribs strengthens the volute, preventing deformation and cracking under high-pressure fluid impact. By adding cutting ribs on the outer wall of the volute corresponding to the inlet pipe joint, the volute can be reinforced. The convex shape can also play a role in disturbing and guiding the flow, reducing the erosion of the volute by the fluid. In addition, large solid particles carried by the fluid first collide with the cutting ribs during the process of entering the volute and are cut and broken by the toothed grooves, which facilitates the subsequent impeller pumping.

[0020] The present invention relates to a working method for a horizontal slurry pump with dual inlet sides. The impeller has two isolated blade mounting cavities, which can independently pump fluid from the inner and outer inlet cavities. The dual pumps operate in parallel, and sufficient material supply is ensured through the relatively independent inlet cavities. Under the same motor specifications and head, the pumping flow rate is significantly improved. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the horizontal slurry pump with double-sided water inlet according to the present invention; Figure 2 This is a schematic front sectional view of the pump head portion of the double-inlet horizontal slurry pump of the present invention. Figure 3 This is a three-dimensional structural diagram of the pump housing in this invention; Figure 4 This is a rear view schematic diagram of the pump housing structure in this invention; Figure 5 This is a front view of the rear connecting cover plate in this invention. Figure 6 This is a rear view of the pump housing structure in another embodiment of the present invention; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of part A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Pump housing; 101. Volute; 102. Inlet pipe connector; 103. Outlet pipe connector; 104. Connection port; 105. Inspection port; 106. Reinforcing rib; 107. Cutting rib; 2. Impeller; 201. Baffle plate; 202. First inlet; 203. Second inlet; 3. Rear connecting cover plate; 301. Positioning block; 302. Positioning platform; 303. Through shaft hole; 4. Inspection cover plate; 5. Main shaft; 6. Spacer block; 7. Rear guard plate; 8. Connecting screw; 9. Mechanical seal; 10. Outer inlet chamber; 11. Inner inlet chamber; 12. Lifting ring; 13. Bracket; 131. Front support arm; 14. Bearing housing. Detailed Implementation

[0024] The core of this invention is to provide a horizontal slurry pump with double-sided water inlet and its working method. By adopting a double-sided water inlet method, the axial forces on both sides of the impeller are offset, which reduces the axial load on the main shaft and improves the service life of the equipment.

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Refer to the attached diagram. Figure 1 This is a three-dimensional structural diagram of the horizontal slurry pump with double-sided water inlet according to the present invention; Figure 2 This is a schematic front sectional view of the pump head portion of the double-inlet horizontal slurry pump of the present invention. Figure 3 This is a three-dimensional structural diagram of the pump housing in this invention; Figure 4 This is a rear view schematic diagram of the pump housing structure in this invention; Figure 5 This is a front view of the rear connecting cover plate in this invention. Figure 6 This is a rear view of the pump housing structure in another embodiment of the present invention; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of part A in the middle.

[0028] Example 1 In one specific implementation, such as Figures 1-5 As shown, the present invention, a horizontal slurry pump with double-sided inlet, includes a base, a motor, a bracket 13, and a bearing housing 14. The base and motor are not shown in the patent drawings because horizontal slurry pumps generally include these two components; therefore, they will not be elaborated upon here and should not be considered a limitation of this application. The motor and bracket 13 are mounted on the top surface of the base, and the motor is connected to the rear end of the main shaft 5 via a coupling. The bearing housing 14 is mounted on the bracket 13 and horizontally supports the main shaft 5. A key difference between this invention and existing horizontal slurry pumps also includes: The pump housing 1 includes a volute 101, an inlet pipe connector 102, an outlet pipe connector 103, and a connection port 104. The volute 101 is an annular pump sleeve made of wear-resistant metal material, generally high-chromium cast iron, which is equivalent to the inner casing sheath of a traditional double-casing slurry pump. Outer protective shells extend from both sides of the volute 101 and are connected to the outer wall of the volute 101; the two are integrally formed by casting. Obviously, if stainless steel is used, welding can also be used for connection; both forming methods fall within the protection scope of this application. The inlet pipe connector 102 is connected to one side wall of the outer protective shell, with its inner opening located at the front and rear ends of the volute 101, respectively. The outlet pipe connector 103 is arranged tangentially at the outer edge of the volute 101, and its root connects to the inner cavity of the volute 101.

[0029] Impeller 2 is mounted on the shaft end of main shaft 5 and rotatably fitted inside volute 101. A partition 201 is provided in the middle of impeller 2, dividing it into two symmetrical blade mounting cavities. Five blades are evenly distributed around the circumference of each blade mounting cavity. The partition 201 and side plates are fixedly connected to both sides of the blades to form flow channels. Specifically, the blades are helical blades. A first inlet 202 and a second inlet 203 are respectively provided at the root of the two blade mounting cavities. The second inlet 203 faces forward and is fitted with a clearance between the outer wall of the sleeve and the central hole of the front side wall of volute 101.

[0030] The outer housing facing the bearing housing 14 is provided with a connection port 104. The rear connecting cover plate 3 is sealed and installed on the connection port 104 by multiple flange bolts, with a sealing gasket pressed between them. The rear connecting cover plate 3 is connected to the front end of the bracket 13. A mechanical seal 9 is provided on the outside of the through-shaft hole 303 in the middle of the rear connecting cover plate 3. The mechanical seal 9 seals the radial gap between the main shaft 5 and the through-shaft hole 303. The mechanical seal 9 is a purchased part, and the technology is relatively mature, so it will not be described in detail here.

[0031] The rear guard plate 7 seals the opening on the rear wall of the volute 101. The diameter of this opening is larger than that of the impeller 2, allowing for disassembly and installation of the impeller 2. A sealing ring is pressed between the rear guard plate 7 and the annular edge of this opening to prevent high-pressure material from leaking backward. The central hole of the rear guard plate 7 is clearance-fitted with the outer wall of the sleeve of the first liquid inlet 202.

[0032] Specifically, such as Figure 2 As shown, multiple radial ribs are also provided on the outer wall of the side plate of the impeller 2. The radial ribs centrifugally discharge the fluid in the gap between the side plate of the impeller 2, the rear guard plate 7, and the front side wall of the volute 101.

[0033] The impeller 2 is housed within a single-shell pump casing 1, which forms the front and rear inlet cavities, resulting in a simple, compact, and rationally laid-out structure. Compared to traditional slurry pumps that require a separate front guard plate for sealing, this invention uses an integrally designed volute 101 to separate the inlet water cavity and the impeller chamber, resulting in a simpler structure. The impeller 2 is divided into two symmetrical blade mounting cavities by a partition 201, with corresponding inlet cavities located at the root of each cavity, forming two parallel-running centrifugal pumps. This increases flow rate, cancels out axial forces on both sides, and reduces the axial force on the main shaft 5. This invention, a double-inlet horizontal slurry pump, reduces the axial load on the main shaft, protects the mechanical seal 9 and bearings, and extends the equipment's service life.

[0034] In one specific implementation of this embodiment, such as Figure 2 As shown, the impeller 2 has a threaded sleeve coaxially arranged at the middle position of the first liquid inlet 202. The threaded sleeve is connected to the threaded rod at the end of the main shaft 5 by a left-hand thread. That is, the first liquid inlet 202 is actually a liquid inlet with an annular cross section.

[0035] The threaded sleeve is connected to the threaded rod at the end of the main shaft 5 by a left-hand thread. During the forward rotation of the equipment, the threaded connection will not loosen, ensuring a reliable connection.

[0036] In one specific implementation of this embodiment, such as Figure 1 , Figure 2 and Figure 5 As shown, the double-inlet horizontal slurry pump of the present invention also includes spacer blocks 6. Multiple spacer blocks 6 are evenly distributed around the back of the rear guard plate 7, and the spacer blocks 6 are spaced between the rear guard plate 7 and the rear connecting cover plate 3. The two ends of the spacer blocks 6 are respectively fixedly connected to the side walls of the rear guard plate 7 and the rear connecting cover plate 3, and the connection is made by screws.

[0037] Specifically, such as Figure 1 , Figure 2 and Figure 5As shown, two positioning blocks 301 are symmetrically arranged on the rear side wall of the rear connecting cover plate 3 about the axis of the through hole 303. The top surface of the positioning block 301 is provided with a protruding positioning platform 302. Two front support arms 131 are symmetrically arranged at the front end of the bracket 13. The front support arms 131 are positioned and locked onto the positioning platform 302 and fixedly connected by the connecting screw 8.

[0038] By fixing the spacer block 6 between the rear guard plate 7 and the rear connecting cover plate 3, the rear guard plate 7 can be installed simultaneously with the installation of the rear connecting cover plate 3. When installing the pump housing 1, the rear guard plate 7 can be directly aligned and pressed against the opening on the rear wall of the volute 101. The rear connecting cover plate 3 can be quickly positioned and installed by the cooperation of the positioning table 302 and the front support arm 131 of the bracket 13.

[0039] In one specific implementation of this embodiment, such as Figure 2 and Figure 4 As shown, an outer water inlet cavity 10 is formed between the front sidewall of the volute portion 101 and the front outer protective shell. An inner water inlet cavity 11 is formed between the rear protective plate 7, the rear connecting cover plate 3, and the rear outer protective shell. The water inlet pipe connector 102 connects both the outer water inlet cavity 10 and the inner water inlet cavity 11, and the volute portion 101 is centrally located in the middle of the water inlet pipe connector 102 in the width direction.

[0040] In other words, the inner water inlet chamber 11 and the outer water inlet chamber 10 are separated on the low-pressure side of the impeller 2, forming two relatively independent water inlet chambers. Since the blade mounting cavities on both sides of the impeller 2 are consistent, the axial pressure on the front and rear sides is consistent and can be almost completely canceled out.

[0041] Specifically, such as Figures 1-4 As shown, an inspection port 105 is provided on the front side wall of the outer water inlet chamber 10. The inspection port 105 is connected to an inspection cover plate 4 for sealing via flange bolts. A sealing gasket is installed between the inspection port 105 and the inspection cover plate 4.

[0042] Specifically, such as Figures 1-4 As shown, a threaded hole is provided at the top of the outer edge of the inspection cover plate 4, and a lifting ring 12 is connected to the threaded hole.

[0043] The addition of inspection port 105 and inspection cover plate 4 not only serves for observation and maintenance but also meets the requirements of the pump housing 1 casting process. The addition of lifting ring 12 facilitates the hoisting of the pump housing 1.

[0044] In one specific implementation of this embodiment, such as Figure 1 , Figure 2 and Figure 4As shown, a plurality of reinforcing ribs 106 are provided at intervals on the exposed outer wall of the volute portion 101, and the reinforcing ribs 106 are arranged along the width direction of the volute portion 101.

[0045] By adding reinforcing ribs 106, the volute 101 can be reinforced with external ribs to prevent it from deforming and cracking under the impact of high-pressure fluid.

[0046] The working process of the dual-inlet horizontal slurry pump in this embodiment is as follows: First, priming is performed, that is, the fluid to be transported is injected into the outlet pipe joint 103 to completely fill the pump chamber with the fluid to be transported. Observe whether the valve on the pipe connected to the inlet pipe joint 102 is open; if not, open it. Operate the start button on the electrical control box, and the motor starts to drive the main shaft 5 to rotate. The main shaft 5 drives the impeller 2, and the blades on both sides of the impeller 2 centrifugally throw out the fluid, which is discharged outward along the outlet pipe joint 103 and the pipe. At the same time, a negative pressure is formed at the first inlet 202 and the second inlet 203, and the fluid in the inner inlet chamber 11 and the outer inlet chamber 10 replenishes the first inlet 202 and the second inlet 203 and is continuously pumped. The fluid introduced by the inlet pipe joint 102 is separated by the outer wall of the volute 101 facing the inlet pipe joint 102 and enters the inner inlet chamber 11 and the outer inlet chamber 10 respectively for real-time replenishment.

[0047] In summary, the present invention, a horizontal slurry pump with dual-sided inlet, utilizes an integrated single-shell pump casing 1 to house the impeller 2 and forms inlet cavities on both the front and rear sides, resulting in a simple, compact, and rationally designed structure. Compared to traditional slurry pumps that require a separate front guard plate for sealing, the present invention uses an integrated volute 101 to separate the inlet cavity and impeller chamber on the front side wall, resulting in a simpler structure. The impeller 2 is divided into two symmetrical blade mounting cavities by a partition 201, with corresponding inlet cavities located at the root of each cavity, forming two parallel-operating centrifugal pumps. This increases flow rate, cancels out axial forces on both sides, and reduces the axial force on the main shaft 5. The dual-sided inlet horizontal slurry pump of the present invention, employing a dual-sided inlet method, reduces the axial load on the main shaft, protects the mechanical seal 9 and bearings, and improves the service life of the equipment. Furthermore, the threaded sleeve, connected to the threaded rod at the end of the main shaft 5 using a left-hand thread, ensures a reliable connection during forward rotation without loosening. By fixing the spacer block 6 between the rear guard plate 7 and the rear connecting cover plate 3, the rear guard plate 7 can be installed simultaneously with the rear connecting cover plate 3. When installing the pump housing 1, the rear guard plate 7 can be directly aligned and pressed against the opening on the rear wall of the volute 101. The rear connecting cover plate 3 can be quickly positioned and installed by the positioning table 302 and the front support arm 131 of the bracket 13. The addition of the inspection port 105 and inspection cover plate 4 not only facilitates observation and maintenance but also meets the requirements of the pump housing 1 casting process. The addition of the lifting ring 12 facilitates the hoisting of the pump housing 1. The addition of reinforcing ribs 106 provides external rib reinforcement to the volute 101, preventing deformation and cracking under high-pressure fluid impact.

[0048] Example 2 In Embodiment 1 described above, the outer wall of the volute portion 101, directly opposite the inlet pipe connector 102, is impacted not only by the high-pressure fluid inside but also by the input fluid introduced through the inlet pipe connector 102. Especially when the pumped fluid contains large solid particles, these particles first impact the outer wall of the volute portion 101 before being diverted to the inner inlet chamber 11 or the outer inlet chamber 10. This impact from large solid particles can damage the volute portion 101, ultimately leading to the failure and replacement of the entire pump housing 1. Therefore, it is necessary to reinforce this vulnerable volute portion 101.

[0049] This embodiment is formed by reinforcing the weak points based on the above embodiment 1, such as... Figure 6 and 7 As shown, the double-inlet horizontal slurry pump of the present invention also includes cutting ribs 107. Multiple cutting ribs 107 are integrally formed on the outer wall of the volute 101, and the cutting ribs 107 are located at positions corresponding to the inlet pipe joint 102. The cutting ribs 107 are arranged along the width direction of the volute 101 and are also integrally formed by casting.

[0050] Specifically, such as Figure 6 and Figure 7 As shown, multiple continuous cutting tooth grooves are provided at the outer edge of the cutting rib 107.

[0051] By adding cutting ribs 107 on the outer wall of the volute 101 corresponding to the inlet pipe connector 102, the volute 101 can be reinforced. The convex shape can also play a role in disturbing and guiding the flow, reducing the erosion of the volute 101 by the fluid. In addition, large solid particles carried by the fluid first collide with the cutting ribs 107 during the process of fluid entry and are cut and broken by the toothed groove, which is convenient for the impeller 2 to pump.

[0052] The present invention also discloses a working method for a horizontal slurry pump with double-sided water inlet, which is used to pump solid-liquid mixtures using the horizontal slurry pump with double-sided water inlet in any of the above embodiments.

[0053] The impeller 2 has two isolated blade mounting cavities, which can independently pump the fluid in the inner water inlet cavity 11 and the outer water inlet cavity 10. The dual pumps operate in parallel, and the relatively independent water inlet cavities ensure sufficient material supply. Under the same motor specifications and head, the pumping flow rate is greatly improved.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A horizontal slurry pump with double-sided inlet, comprising a base, a motor, a bracket (13), and a bearing housing (14), characterized in that, Also includes: The pump housing (1) includes a volute (101), an inlet pipe connector (102), an outlet pipe connector (103), and a connection port (104). The volute (101) is an annular pump sleeve made of wear-resistant metal material. An outer protective shell extends on both sides of the volute (101). The inlet pipe connector (102) is connected to one side wall of the outer protective shell, and the front and rear ends of the inner opening are respectively located on the front and rear sides of the volute (101). The outlet pipe connector (103) is arranged along the tangential direction at the outer edge of the volute (101), and its root is connected to the inner cavity of the volute (101). An impeller (2) is installed on the shaft end of the main shaft (5) and fits inside the volute (101). A partition (201) is provided in the middle of the impeller (2). The partition (201) divides the inner cavity of the impeller (2) into two symmetrical blade mounting cavities. The root of the two blade mounting cavities is provided with a first liquid inlet (202) and a second liquid inlet (203). The second liquid inlet (203) is arranged facing forward and the outer wall of the sleeve and the central hole of the front side wall of the volute (101) are fitted with a clearance. The rear connecting cover plate (3) is sealed and installed on the connecting port (104) by multiple flange bolts. The rear connecting cover plate (3) is connected to the front end of the bracket (13). A mechanical seal (9) is provided on the outside of the through-shaft hole (303) in the middle of the rear connecting cover plate (3). The rear guard plate (7) seals the opening on the rear wall of the volute (101), and the central hole of the rear guard plate (7) is clearance-fitted with the outer wall of the sleeve of the first liquid inlet (202).

2. The horizontal slurry pump with double-sided inlet as described in claim 1, characterized in that: The impeller (2) is coaxially provided with a threaded sleeve at the middle position of the first liquid inlet (202). The threaded sleeve is connected to the threaded rod at the end of the main shaft (5) by a left-hand thread.

3. The horizontal slurry pump with double-sided water inlet according to claim 1, characterized in that: It also includes spacer blocks (6), a plurality of spacer blocks (6) are evenly distributed around the back of the rear guard plate (7), the spacer blocks (6) are spaced between the rear guard plate (7) and the rear connecting cover plate (3); the two ends of the spacer blocks (6) are respectively fixedly connected to the side walls of the rear guard plate (7) and the rear connecting cover plate (3).

4. The horizontal slurry pump with double-sided water inlet according to claim 3, characterized in that: Two positioning blocks (301) are symmetrically arranged on the rear side wall of the rear connecting cover plate (3) about the axis of the through hole (303), and a positioning platform (302) is provided on the top surface of the positioning block (301); two front support arms (131) are symmetrically arranged at the front end of the bracket (13), and the front support arms (131) are positioned and connected to the positioning platform (302) and fixedly connected by the connecting screw (8).

5. The horizontal slurry pump with double-sided water inlet according to claim 1, characterized in that: An outer water inlet cavity (10) is formed between the front sidewall of the volute (101) and the front end of the outer protective shell; an inner water inlet cavity (11) is formed between the rear protective plate (7), the rear connecting cover plate (3) and the rear end of the outer protective shell; the water inlet pipe joint (102) connects the outer water inlet cavity (10) and the inner water inlet cavity (11) simultaneously.

6. The horizontal slurry pump with double-sided water inlet according to claim 5, characterized in that, An inspection port (105) is provided on the front side wall of the outer water inlet chamber (10), and the inspection port (105) is connected to an inspection cover plate (4) for sealing by flange bolts.

7. The horizontal slurry pump with double-sided inlet as described in claim 6, characterized in that: The top edge of the inspection cover (4) is provided with a threaded hole, and a lifting ring (12) is threaded into the threaded hole.

8. The horizontal slurry pump with double-sided inlet as described in claim 1, characterized in that: The outer wall of the volute (101) is provided with a plurality of reinforcing ribs (106) spaced apart, and the reinforcing ribs (106) are arranged along the width direction of the volute (101).

9. The horizontal slurry pump with double-sided water inlet according to claim 8, characterized in that: It also includes cutting ribs (107), a plurality of cutting ribs (107) are integrally disposed on the outer wall of the volute (101), and the cutting ribs (107) are located at the position corresponding to the water inlet pipe joint (102); a plurality of continuous cutting tooth grooves are provided on the outer edge of the cutting ribs (107).

10. A method for operating a horizontal slurry pump with dual-sided water inlet, characterized in that: The double-inlet horizontal slurry pump described in any one of claims 1 to 9 is used for pumping solid-liquid mixtures.

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