screw pump

Abstract

The application discloses a screw pump, comprising a pump body, a driving device, a suction body and a discharge body. The pump body has a feeding end and a discharging end, and comprises a stator and a rotor matched with the stator; the driving device comprises an output shaft; the suction body is connected with the feeding end, and comprises a main body part, a tubular connecting part and a flange plate; an intermediate shaft connected with the output shaft and the rotor at two ends is arranged in the inside of the main body part; the connecting part is protruded on the outer surface of the main body part and is integrally formed with the main body part; the connecting part is communicated with the inside of the main body part; and the connecting part is welded and fixed with the flange plate; and the discharge body is connected with the discharging end. The screw pump of the application adopts the design that the connecting part is integrally formed with the main body part, so that the connecting part protruded on the outer surface of the main body part can be smoothly welded with the flange plate, not only the welding operation is simplified, but also the welding quality can be further improved, the possibility of being corroded by materials is reduced, and the overall durability of the screw pump is improved.

Description

Technical Field

[0001] This application relates to the technical field of screw pumps, and in particular to a screw pump. Background Technology

[0002] The screw pump comprises a discharge body, a pump body, a suction body, and a drive unit connected in sequence. The existing suction body includes a main body with a material inlet, which is directly welded to a flange. However, in this structure, the flange can only be welded to the outer edge of the material inlet; its inner wall is difficult to weld effectively to the flange. Therefore, this location is susceptible to corrosion by materials and requires further improvement. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a screw pump.

[0004] Screw pumps, including:

[0005] The pump body has an inlet end and an outlet end, and the pump body includes a stator and a rotor that cooperates with the stator;

[0006] Drive unit, including output shaft;

[0007] The suction body is connected to the feed end. The suction body includes a main body, a tubular connecting part, and a flange. The main body has an intermediate shaft with two ends connected to the output shaft and the rotor, respectively. The connecting part protrudes from the outer surface of the main body and is integrally formed with the main body. The connecting part communicates with the interior of the main body and is welded and fixed to the flange.

[0008] The discharge body is connected to the discharge end.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] Optionally, the connecting part is extruded.

[0011] Optionally, the wall thickness of the connecting portion is less than the wall thickness of the main body portion.

[0012] Optionally, the wall thickness of the connecting portion gradually decreases along the axial direction of the connecting portion.

[0013] Optionally, the outer wall of the connecting part is welded to the inner wall of the flange.

[0014] Optionally, the main body is a cylindrical structure, and the connecting part is disposed on the side wall of the main body.

[0015] Optionally, the inhalation body includes a detachably connected first part and a second part, with the connecting part disposed on the second part.

[0016] Optionally, the side wall of the first part is provided with an inspection port.

[0017] Optionally, the two ends of the intermediate shaft are connected to the rotor and the output shaft respectively via universal joints.

[0018] Optionally, the discharge body and the suction body are connected by a tie rod to clamp and fix the pump body.

[0019] The screw pump of this application adopts a design in which the connecting part and the main body are integrally formed, so that the connecting part protruding from the outer surface of the main body can be smoothly welded to the flange. This not only simplifies the welding operation, but also further improves the welding quality, reduces the possibility of corrosion by materials, and improves the overall durability of the screw pump. Attached Figure Description

[0020] Figure 1 A cross-sectional view of a screw pump according to an embodiment provided in this application;

[0021] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0022] Figure 3 This is a structural diagram of the main body and connecting parts.

[0023] The annotations in the figure are explained as follows:

[0024] 100. Discharge body; 110. Pull rod;

[0025] 200. Pump body; 201. Stator; 202. Rotor; 210. Inlet end; 220. Outlet end;

[0026] 300. Drive unit; 310. Output shaft; 320. Driver;

[0027] 400, Suction body; 410, Main body; 420, Connecting part; 430, Flange; 440, Intermediate shaft; 450, First part; 451, Inspection port; 452, Cover plate; 460, Second part. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a system, product, or device that includes a series of units is not necessarily limited to those units that are explicitly listed, but may include other units that are not explicitly listed or that are inherent to such products or devices.

[0033] See Figures 1-3 One embodiment of this application provides a screw pump, including a discharge body 100, a pump body 200, a suction body 400, and a drive device 300 connected in sequence. The discharge body 100 and suction body 400 mentioned in this application are relative; that is, material can enter from the suction body 400, pass through the pump body 200, and be discharged from the discharge body 100, or it can enter from the discharge body 100, pass through the pump body 200, and be discharged from the suction body 400.

[0034] See Figure 1The pump body 200 has an inlet end 210 and an outlet end 220. The discharge body 100 is connected to the outlet end 220. The pump body 200 includes a stator 201 and a rotor 202 that cooperates with the stator 201. The drive unit 300 includes an output shaft 310 and a driver 320 (e.g., a motor shown in the figure) that is directly or indirectly connected to the output shaft 310 for providing power.

[0035] The suction body 400 is connected to the feed end 210 and includes a main body 410, a tubular connecting part 420 and a flange 430. The main body 410 has an intermediate shaft 440 with two ends connected to the output shaft 310 and the rotor 202 respectively. The connecting part 420 protrudes from the outer surface of the main body 410 and is integrally formed with the main body 410. The connecting part 420 communicates with the interior of the main body 410 (so that the material can flow between the two). The connecting part 420 is welded and fixed to the flange 430.

[0036] In one embodiment, the two ends of the intermediate shaft 440 are connected to the rotor 202 and the output shaft 310 respectively via universal joints. See also Figure 1 The discharge body 100 and the suction body 400 are connected by a tie rod 110 to clamp and fix the pump body 200.

[0037] The screw pump of this application adopts a design in which the connecting part 420 and the main body 410 are integrally formed, so that the connecting part 420 protruding from the outer surface of the main body 410 can be smoothly welded to the flange 430. This not only simplifies the welding operation, but also further improves the welding quality, reduces the possibility of corrosion by materials, and improves the overall durability of the screw pump.

[0038] In one embodiment, the connecting part 420 is extruded, which ensures the structural integrity and dimensional accuracy between the connecting part 420 and the main body part 410.

[0039] See Figures 2-3 In one embodiment, the wall thickness of the connecting portion 420 is less than the wall thickness of the main body portion 410. Furthermore, along the axial direction of the connecting portion 420, the wall thickness of the connecting portion 420 gradually decreases. That is, the portion of the connecting portion 420 integrally formed with the main body portion 410 has the thickest wall thickness, and the end furthest from the main body portion 410 has the thinnest wall thickness.

[0040] In one embodiment, the outer wall of the connecting part 420 is welded to the inner wall of the flange 430, which not only makes the welding more convenient but also improves the quality of the welding.

[0041] In one embodiment, the main body 410 has a cylindrical structure, and the connecting part 420 is disposed on the side wall of the main body 410.

[0042] For ease of maintenance, the suction body 400 includes a detachably connected first part 450 and a second part 460, with a connecting part 420 disposed in the second part 460. Furthermore, an inspection port 451 is provided on the side wall of the first part 450. A cover plate 452 secured with screws is provided at the inspection port 451. When maintenance is required, simply unscrew the screws and remove the cover plate 452; there is no need to disassemble the pump body and main body, thus improving maintenance efficiency.

[0043] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0044] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A screw pump, characterized in that include: The pump body has an inlet end and an outlet end, and the pump body includes a stator and a rotor that cooperates with the stator; Drive unit, including output shaft; The suction body is connected to the feed end. The suction body includes a main body, a tubular connecting part, and a flange. The main body has an intermediate shaft with two ends connected to the output shaft and the rotor, respectively. The connecting part protrudes from the outer surface of the main body and is integrally formed with the main body. The connecting part communicates with the interior of the main body and is welded and fixed to the flange. The discharge body is connected to the discharge end.

2. The screw pump according to claim 1, characterized in that, The connecting part is formed by extrusion molding.

3. The screw pump according to claim 1, characterized in that, The wall thickness of the connecting part is less than the wall thickness of the main body part.

4. The screw pump according to claim 1, characterized in that, Along the axial direction of the connecting portion, the wall thickness of the connecting portion gradually decreases.

5. The screw pump according to claim 1, characterized in that, The outer wall of the connecting part is welded to the inner wall of the flange.

6. The screw pump according to claim 1, characterized in that, The main body is a cylindrical structure, and the connecting part is disposed on the side wall of the main body.

7. The screw pump according to claim 1, characterized in that, The inhalation body includes a first part and a second part that are detachably connected, with the connecting part disposed on the second part.

8. The screw pump according to claim 7, characterized in that, The first part has an inspection port on its side wall.

9. The screw pump according to claim 1, characterized in that, The two ends of the intermediate shaft are connected to the rotor and the output shaft respectively via universal joints.

10. The screw pump according to claim 1, characterized in that, The discharge body and the suction body are connected by a tie rod to clamp and fix the pump body.

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