Spiral centrifugal pump capable of preventing inlet end from being blocked

Abstract

The utility model relates to a spiral centrifugal pump capable of preventing an inlet end from being blocked, which comprises a pump shell and a volute arranged on the pump shell, and further comprises an impeller rotationally arranged in the volute; the grooves are symmetrically formed in the surfaces of the two sides of the impeller blades, the groove depth of each groove is 1 / 5-1 / 3 of the thickness of each impeller blade, the groove width of each groove is gradually increased in the radial direction, the pump shell and the volute are connected through at least four bolts, a transmission shaft is arranged on the pump shell, one end of the transmission shaft is connected with a motor, and the other end of the transmission shaft is connected with a transmission shaft. According to the spiral centrifugal pump capable of preventing the inlet end from being blocked, the grooves are symmetrically formed in the two sides of the impeller blades, the structure plays a bidirectional flow guiding role on media, materials are guided to move towards the outlet end of the volute along the grooves, meanwhile, vortexes with certain shearing force are formed, and accumulation of impurities in the media is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of spiral centrifugal pump technology, specifically relating to a spiral centrifugal pump that prevents blockage at the inlet end. Background Technology

[0002] The spiral centrifugal pump is a unique type of pump that combines spiral propulsion and centrifugal principles. It is widely used in numerous industrial and civilian applications. Structurally, its impeller is typically spiral-shaped, similar to a screw, and combined with a volute pump body. During operation, the spiral impeller propels the fluid axially, while simultaneously, the fluid gains velocity energy under centrifugal force. This unique design gives it excellent throughput performance, enabling it to easily transport media containing long fibers and large particulate impurities.

[0003] Traditional spiral centrifugal pumps have the drawback that during operation, materials tend to adhere to the impeller surface at the inlet end, hindering the flow of the medium. This not only reduces the pump's conveying capacity but may also cause equipment damage and increase maintenance costs. Therefore, a spiral centrifugal pump designed to prevent inlet blockage is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a spiral centrifugal pump that can generate a shearing worm gear to prevent inlet blockage in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A spiral centrifugal pump designed to prevent inlet blockage includes a pump casing and a volute disposed on the pump casing, and further includes:

[0007] Impeller, the impeller being rotatably disposed within the volute;

[0008] The grooves are symmetrically formed on both sides of the impeller blade surface.

[0009] As a further optimization of this utility model, the groove depth is 1 / 5 to 1 / 3 of the impeller blade thickness, and the groove width gradually increases radially.

[0010] As a further optimization of this utility model, the pump housing and the volute are connected by no less than four bolts, and a drive shaft is provided on the pump housing. One end of the drive shaft is connected to the motor, and the other end of the drive shaft extends into the volute.

[0011] As a further optimization of this utility model, the impeller is sleeved on the drive shaft, and a fixing nut is provided on the drive shaft, with the fixing nut located at one end of the impeller.

[0012] As a further optimization of this utility model, the volute is provided with an outlet end and an inlet end, and a cone is provided between the inlet end and the volute. The cone is coaxially disposed inside the inlet end, and its inner diameter gradually expands along the direction of medium flow.

[0013] As a further optimization of this utility model, L-shaped scrapers are provided on both sides of the fixing nut, and the L-shaped scrapers are in close contact with the inner wall of the cone.

[0014] The beneficial effects of this utility model are as follows:

[0015] Unlike existing technologies, in actual use, grooves are symmetrically opened on both sides of the impeller blades. This structure generates a bidirectional flow guiding effect on the medium, guiding the material to move along the grooves towards the outlet end of the volute, while forming a vortex with a certain shear force, effectively reducing the accumulation of impurities in the medium. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the partial cross-sectional structure of the volute of this utility model;

[0018] Figure 3 This is a schematic diagram of the impeller structure of this utility model;

[0019] Figure 4 This is a utility model Figure 3 Another perspective structural diagram;

[0020] Figure 5 This is a schematic diagram of the fixing nut structure of this utility model.

[0021] In the diagram: 1. Pump casing; 2. Volute; 21. Outlet end; 22. Inlet end; 23. Cone; 3. Drive shaft; 31. Fixing nut; 4. Impeller; 5. Groove; 6. L-shaped scraper. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1

[0024] like Figure 1 - Figure 5 As shown, a spiral centrifugal pump for preventing inlet blockage includes a pump casing 1 and a volute 2 disposed on the pump casing 1, and further includes:

[0025] Impeller 4, which is rotatably mounted in volute 2;

[0026] Groove 5 is symmetrically formed on both sides of the impeller blade 4.

[0027] The groove depth of groove 5 is 1 / 5 to 1 / 3 of the thickness of impeller blade 4, and the groove width gradually increases radially. Groove 5 has a guiding effect on the medium, guiding the material to move along groove 5 towards the volute outlet end 21. At the same time, it makes the fluid medium form a vortex with a certain shear force, which can effectively disperse and transport impurities in the medium, avoid impurities from accumulating in the pump, greatly reduce the risk of blockage, and significantly improve the conveying efficiency and stability.

[0028] The pump casing 1 and the volute 2 are connected by no less than four bolts to ensure the sealing of the pump during operation, prevent media leakage, and ensure the structural strength of the entire pump body. A drive shaft 3 is provided on the pump casing 1. One end of the drive shaft 3 is connected to the motor, and the other end of the drive shaft 3 extends into the volute 2.

[0029] The impeller 4 is mounted on the drive shaft 3, and a fixing nut 31 is provided on the drive shaft 3. The fixing nut 31 is located at one end of the impeller 4, and is rigidly fixed by the fixing nut 31. This structure ensures the stability of the impeller 4 during high-speed rotation and accurately transmits the power of the motor.

[0030] The volute 2 is provided with an outlet end 21 and an inlet end 22. A cone 23 is provided between the inlet end 22 and the volute 2. The cone 23 is coaxially arranged inside the inlet end 22, and its inner diameter gradually expands along the direction of medium flow. This can accelerate the axial flow of the medium, increase the speed at which the medium enters the volute 2, and reduce the pressure loss at the outlet end 21. The cone 23 is made of high-molecular composite material, and its inner surface is provided with a wear-resistant ceramic coating with a surface roughness Ra≤0.8μm, which can effectively reduce the entanglement of fibers on the inner wall, enhance the wear resistance of the components, and extend the service life of the equipment.

[0031] The fixing nut 31 is provided with L-shaped scrapers 6 on both sides. The L-shaped scrapers 6 are close to the inner wall of the cone 23. When the drive shaft 3 rotates, the fixing nut 31 rotates synchronously with the drive shaft 3. At the same time, the scrapers 6 provided on the fixing nut 31 are close to the cone 23 to clean the inner surface of the cone 23, so as to prevent the material from sticking to the inner wall of the cone 23 and causing the inlet end 22 to be blocked.

[0032] It should be noted that when the spiral centrifugal pump is working, the motor drives the transmission shaft 3 to drive the impeller 4 to rotate at high speed inside the volute 2. The grooves 5 symmetrically opened on both sides of the impeller blades, through their radially increasing groove width structure and groove depth of 1 / 5-1 / 3 of the blade thickness, generate a bidirectional flow effect on the medium, guiding the material to move along the grooves 5 towards the outlet end 21 of the volute, while forming a vortex with a certain shear force. The cone 23 coaxially set inside the inlet end 22 accelerates the axial flow of the medium through the gradually expanding inner diameter structure. The surface roughness Ra of the wear-resistant ceramic coating on its inner surface is ≤0.8μm, which can reduce the entanglement of fibers. The transmission shaft 3 rigidly fixes the impeller 4 through the fixing nut 31. The pump casing 1 and the volute 2 are connected by multiple bolts to form a stable cavity. When the transmission shaft 3 rotates, the fixing nut 31 rotates synchronously with the transmission shaft 3. At the same time, the scraper 6 set on the fixing nut 31 and closely attached to the cone 23 cleans the inner surface of the cone 23, preventing the material from sticking to the inner wall of the cone 23 and causing blockage at the inlet end 22, ultimately achieving the functions of anti-blockage at the inlet end 22 and efficient conveying.

[0033] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A spiral centrifugal pump for preventing inlet blockage, comprising a pump casing (1) and a volute (2) disposed on the pump casing (1), characterized in that: It also includes: Impeller (4), which is rotatably disposed in volute (2); Grooves (5) are symmetrically formed on both sides of the blades of the impeller (4).

2. A spiral centrifugal pump for preventing inlet blockage according to claim 1, characterized in that: The groove (5) has a groove depth of 1 / 5 to 1 / 3 of the thickness of the impeller (4) blade, and the groove width gradually increases radially.

3. A spiral centrifugal pump for preventing inlet blockage according to claim 1, characterized in that: The pump housing (1) and the volute (2) are connected by no less than four bolts. A drive shaft (3) is provided on the pump housing (1). One end of the drive shaft (3) is connected to the motor, and the other end of the drive shaft (3) extends into the volute (2).

4. A spiral centrifugal pump for preventing inlet blockage according to claim 3, characterized in that: The impeller (4) is sleeved on the drive shaft (3), and a fixing nut (31) is provided on the drive shaft (3). The fixing nut (31) is located at one end of the impeller (4).

5. A spiral centrifugal pump for preventing inlet blockage according to claim 1, characterized in that: The volute (2) is provided with an outlet end (21) and an inlet end (22). A cone (23) is provided between the inlet end (22) and the volute (2). The cone (23) is coaxially arranged inside the inlet end (22), and its inner diameter gradually expands along the direction of medium flow.

6. A spiral centrifugal pump for preventing inlet blockage according to claim 4, characterized in that: The fixing nut (31) is provided with L-shaped scrapers (6) on both sides, and the L-shaped scrapers (6) are in close contact with the inner wall of the cone (23).

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