Double suction pump capable of avoiding cavitation

Abstract

The utility model relates to the technical field of double-suction pumps, and discloses a double-suction pump capable of avoiding cavitation erosion, which comprises a pump body and a connecting component, a liquid inlet pipeline is arranged on the suction side of the pump body, a metal pipe is detachably mounted on the inner side of the liquid inlet pipeline through the connecting component, and a plating layer covers the inner wall of the metal pipe through an electroplating process. The connecting assembly comprises a ring seat and an inserting piece, a ring groove is formed in the ring seat, a plurality of locking seats are evenly distributed in the ring groove, locking grooves matched with the locking seats are formed in the liquid inlet pipeline, the inserting piece is installed between the adjacent locking grooves, and inserting grooves matched with the inserting piece are formed in the two ends of each locking seat. The metal pipe is fixed inside the liquid inlet pipeline through the connecting assembly, the plating layer with good lubricating performance is electroplated on the inner side of the metal pipe to reduce the flowing resistance of liquid so as to avoid cavitation erosion, and the plating layer covers the inner side of the metal pipe by adopting an electroplating process, so that the plating layer is effectively prevented from falling off, and meanwhile, the plating layer is attached more uniformly.

Description

Technical Field

[0001] The utility model relates to the technical field of double - suction pumps, and specifically relates to a double - suction pump capable of avoiding cavitation. Background Technique

[0002] The pipeline design between the existing liquid storage tank and the inlet of the double - suction pump is generally complex, and the flow resistance of the liquid is large. Most of the fluids in the chemical production process are saturated liquids, which easily cause the pressure of the liquid to decrease before entering the double - suction pump, reaching supersaturation and generating bubbles that flow with the liquid from the low - pressure side of the pump to the high - pressure side. The rapid condensation or rupture of the bubbles under high pressure will trigger cavitation. At present, in the chemical industry, most of the anti - cavitation methods of double - suction pumps are to bond a coating with good lubricity on the inner wall of the pipeline on the suction side of the pump to reduce the flow resistance of the liquid, thereby avoiding cavitation. However, in the actual use process, the bonded coating is very easy to fall off. Content of the Utility Model

[0003] The purpose of the utility model is to provide a double - suction pump capable of avoiding cavitation to solve the problems raised in the above - mentioned background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A double - suction pump capable of avoiding cavitation, including a pump body and a connection component. An inlet pipeline is provided on the suction side of the pump body. A metal pipe is detachably installed inside the inlet pipeline through the connection component. The inner wall of the metal pipe is covered with a coating by electroplating process. The connection component includes a ring seat and a plug. The metal pipe is installed inside the ring seat. A ring groove is opened on the ring seat. A plurality of locking seats are evenly distributed in the ring groove. Locking grooves matching the locking seats are opened on the inlet pipeline. The plug is installed between adjacent locking grooves. Slots matching the plug are opened at both ends of the locking seat.

[0005] In the present application solution, the following improvement is made: The plug includes a fixed seat and an insertion bar. Slope surfaces I are symmetrically arranged on the side of the fixed seat. A through - slot is opened in the middle of the slope surfaces I along the height direction of the fixed seat. The insertion bar is rotatably installed in the through - slot, and an elastic member is connected between the inner side of the insertion bar and the inner wall of the through - slot.

[0006] In the present application solution, the following improvement is made: The bottom end of the insertion bar is provided with slope surfaces II, and slope surfaces III that fit the slope surfaces II are provided on the inner wall of the slot. When the insertion bar enters the slot, the slope surfaces II and III fit together, which can reduce the resistance to facilitate the extrusion and rotation in one direction, and is convenient for pulling out the ring seat from the inlet pipeline to release the fixation.

[0007] In the present application solution, the following improvement is made: The width of the fixed seat matches the distance between adjacent two locking seats.

[0008] The following improvements are made in the solution of this application. A plurality of positioning ribs are uniformly arranged along the circumference on the outer side of the metal pipe, and grooves matching with the positioning ribs are provided on the inner wall of the liquid inlet pipe. Through the matching arrangement between the positioning ribs and the grooves, the contact area between the metal pipe and the liquid inlet pipe is increased, and the fitting is closer.

[0009] The following improvements are made in the solution of this application. A liquid outlet pipe is provided on one side of the pump body away from the liquid inlet pipe.

[0010] Compared with the prior art, the utility model provides a double-suction pump capable of avoiding cavitation, and has the following beneficial effects:

[0011] In the utility model, the metal pipe is fixed inside the liquid inlet pipe through a connecting component. A plating layer with good lubricating performance is electroplated on the inner side of the metal pipe to reduce the flow resistance of the liquid so as to avoid cavitation. And the plating layer is covered on the inner side of the metal pipe by an electroplating process, which effectively prevents the plating layer from falling off and makes the plating layer adhere more uniformly. When connecting, first insert the locking seat into the corresponding matching groove. During the process of the fixing seat fitting with the inner wall of the ring groove, the inserting bar is pushed by extrusion to rotate in the through groove on the first inclined surface. After reaching the position, the inserting bar returns to its position under the action of the elastic member and is inserted into the slot of the locking seat, realizing the locking and fixing between the metal pipe and the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Figure 2 is a schematic structural diagram of the metal pipe and the connecting component;

[0014] Figure 3 is a schematic structural diagram of the plug-in component;

[0015] Figure 4 is a schematic connection diagram of the liquid inlet pipe and the metal pipe.

[0016] In the figure: 1. Pump body; 11. Liquid inlet pipe; 12. Locking groove; 13. Liquid outlet pipe; 2. Metal pipe; 21. Plating layer; 22. Positioning rib; 3. Ring seat; 31. Ring groove; 32. Locking seat; 33. Slot; 34. Third inclined surface; 4. Plug-in component; 41. Fixing seat; 42. Inserting bar; 43. First inclined surface; 44. Through groove; 45. Second inclined surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will describe the technical solutions in the embodiments of the utility model with reference to the accompanying drawings in the embodiments of the utility model:

[0018] As Figures 1-4As shown in the figure, a double-suction pump capable of avoiding cavitation mainly consists of a pump body 1, a metal pipe 2 and a connecting component. The suction side of the pump body 1 is provided with a liquid inlet pipe 11, and the other side is provided with a liquid outlet pipe 13. The inner side of the liquid inlet pipe 11 is detachably connected to the metal pipe 2 through the connecting component. The inner wall of the metal pipe 2 is covered with a coating 21 by electroplating process. By using the electroplating process to cover the coating 21 on the inner side of the metal pipe 2, it can effectively prevent the coating 21 from falling off and make the coating 21 adhere more evenly. And six positioning ribs 22 are evenly arranged along the circumference on the outer side of the metal pipe 2. At the same time, grooves matching with the positioning ribs 22 are provided on the inner wall of the liquid inlet pipe 11.

[0019] The connecting component includes a ring seat 3 and a plug-in part 4. The metal pipe 2 is installed inside the ring seat 3. A ring groove 31 is formed on the ring seat 3, and four locking seats 32 are evenly distributed in the ring groove 31. At the same time, locking grooves 12 matching with the locking seats 32 are formed on the liquid inlet pipe 11. The plug-in part 4 is installed between adjacent locking grooves 12. Slots 33 matching with the plug-in part 4 are formed at both ends of the locking seat 32. The plug-in part 4 includes a fixed seat 41 and an inserting bar 42. The width of the fixed seat 41 matches the distance between adjacent two locking seats 32. And inclined planes 43 are symmetrically arranged on the side of the fixed seat 41. A through groove 44 is formed in the middle of the inclined plane 43 along the height direction of the fixed seat 41. The inserting bar 42 is rotatably installed in the through groove 44, and an elastic part is connected between the inner side of the inserting bar 42 and the inner wall of the through groove 44. The elastic part can be a spring. During the process of the fixed seat 41 fitting with the inner wall of the ring groove 31, the inserting bar 42 is pushed by extrusion to rotate in the through groove 44 on the inclined plane 43 towards the spring side and compress the spring. After the fixed seat 41 is in place, the inserting bar 42 returns to its position under the action of the spring and inserts into the slot 33 of the locking seat 32, thus realizing locking and fixing. The bottom end of the inserting bar 42 is provided with an inclined plane 45, and the inner wall of the slot 33 is provided with an inclined plane 34 fitting with the inclined plane 45.

[0020] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

Claims

1. A double-suction pump capable of avoiding cavitation, comprising a pump body (1) and a connection assembly. The suction side of the pump body (1) is provided with a liquid inlet pipe (11), characterized in that: Inside the liquid inlet pipe (11), a metal pipe (2) is detachably installed through a connecting component. The inner wall of the metal pipe (2) is covered with a coating (21) by electroplating process. The connecting component includes a ring seat (3) and a plug-in part (4). The metal pipe (2) is installed inside the ring seat (3). A ring groove (31) is formed on the ring seat (3). A plurality of locking seats (32) are evenly distributed in the ring groove (31). A locking groove (12) matching with the locking seat (32) is formed on the liquid inlet pipe (11). The plug-in part (4) is installed between adjacent locking grooves (12). Slots (33) matching with the plug-in part (4) are formed at both ends of the locking seat (32).

2. The double-suction pump capable of avoiding cavitation according to claim 1, wherein: The plug-in part (4) includes a fixed seat (41) and an inserting bar (42). A first inclined surface (43) is symmetrically arranged on the side of the fixed seat (41). A through groove (44) is formed in the middle of the first inclined surface (43) along the height direction of the fixed seat (41). The inserting bar (42) is rotatably installed in the through groove (44), and an elastic member is connected between the inner side of the inserting bar (42) and the inner wall of the through groove (44).

3. The double-suction pump capable of avoiding cavitation according to claim 2, characterized in that: A second inclined surface (45) is arranged at the bottom end of the inserting bar (42). A third inclined surface (34) fitting with the second inclined surface (45) is arranged on the inner wall of the slot (33).

4. A double-suction pump capable of avoiding cavitation according to claim 1, characterized in that: The width of the fixed seat (41) matches the distance between two adjacent locking seats (32).

5. The double-suction pump capable of avoiding cavitation according to claim 1, characterized in that: A plurality of positioning ridges (22) are evenly arranged on the outer side of the metal pipe (2) along the circumference. Grooves matching with the positioning ridges (22) are arranged on the inner wall of the liquid inlet pipe (11).

6. The double-suction pump capable of avoiding cavitation according to claim 1, characterized in that: A liquid outlet pipe (13) is arranged on one side of the pump body (1) away from the liquid inlet pipe (11).

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