CN211314656U

CN211314656U - Double-suction pump capable of avoiding cavitation

Info

Publication number: CN211314656U
Application number: CN201922412994.9U
Authority: CN
Inventors: 许兰田; 石昊; 李泊
Original assignee: Tianjin Kesaisi Industry And Trade Co ltd
Current assignee: Tianjin Kesaisi Industry And Trade Co ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-08-21
Anticipated expiration: 2029-12-29

Abstract

The utility model discloses a double suction pump capable of avoiding cavitation erosion, which comprises a shell, wherein both sides of the shell are fixedly connected with a liquid inlet pipe, one end of the inner wall of the liquid inlet pipe is integrally formed with an annular plate, one side surface of the annular plate is provided with a groove, the inside of the groove is provided with a threaded hole, the other end of the inner wall of the liquid inlet pipe is fixedly connected with a baffle, the inside of the liquid inlet pipe is provided with a metal pipe, one end of the metal pipe is integrally formed with a flange, one side surface of the flange is fixedly connected with a clamping block, the other side surface of the flange is inserted with a bolt, the inner wall of the metal pipe is coated with a cadmium plating layer, the inside of the shell is rotatably connected with an impeller, the surface of the impeller is coated with an alumina ceramic layer, the surface of the alumina ceramic layer is coated with a cadmium plating layer, and the surface of the impeller is smooth, so that the generation of cavitation bubbles is reduced, and the service life of the impeller is prolonged.

Description

Double-suction pump capable of avoiding cavitation

Technical Field

The utility model relates to a double entry pump technical field specifically is a can avoid double entry pump of cavitation erosion.

Background

The double suction pump is an important form of the centrifugal pump, and is widely applied to engineering due to the characteristics of high lift, large flow and the like. This pump type impeller is actually made up of two back-to-back impellers, the water flow from the impellers merging into a volute. The double suction pump has the following characteristics: the single-suction impeller with the same diameter works simultaneously, and the flow can be doubled under the same impeller outer diameter; the pump shell is horizontally opened, so that the inspection and the maintenance are convenient, and meanwhile, the inlet and the outlet of the double-suction pump are in the same direction and are vertical to the pump shaft, so that the arrangement and the installation of the pump and the water inlet and outlet pipes are facilitated; the impeller structure of the double suction pump is symmetrical, no axial force exists, and the operation is stable.

Cavitation erosion, also known as cavitation erosion, is the phenomenon of cavitation-like corrosion damage on the metal surface in contact with a fluid under conditions of high-speed flow and pressure change. It often occurs in a high-speed decompression zone such as the tip of a centrifugal pump blade, where cavities are formed, which are crushed in the high-pressure zone and generate an impact pressure, which damages the protective film on the metal surface and increases the corrosion rate. The cavitation erosion is characterized in that a plurality of fine pits are formed on the surface of metal, and then holes are formed by gradually enlarging.

However, the existing double suction pump mainly has the following disadvantages:

1. the inner wall of a liquid inlet pipe of the existing double-suction pump is rough, so that the resistance of liquid flowing in the liquid inlet pipe is increased, and cavitation is easy to generate.

2. The coating of the impeller structure of the existing double-suction pump is unreasonable in design, and the service life of the impeller is affected by cavitation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double suction pump capable of avoiding cavitation so as to solve the problems that the inner wall of a liquid inlet pipe of the existing double suction pump in the background art is rough, which can cause the resistance of liquid flowing in the liquid inlet pipe to increase and is easy to generate cavitation; the coating of the impeller structure of the existing double suction pump is unreasonable in design, and the service life of the impeller is affected by cavitation erosion.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a can avoid double entry pump of cavitation, includes the casing, the equal fixedly connected with feed liquor pipe in casing both sides, feed liquor pipe inner wall one end integrated into one piece has the annular plate, annular plate side surface sets up flutedly, the inside screw hole that sets up of recess, feed liquor pipe inner wall other end fixedly connected with baffle, feed liquor pipe internally mounted has the tubular metal resonator, tubular metal resonator one end integrated into one piece has the flange, flange one side fixed surface is connected with the fixture block, flange opposite side surface is pegged graft there is the bolt, the tubular metal resonator inner wall coating has cadmium-plated layer No. one, the inside rotation of casing is connected with the impeller, the impeller surface coating has the alumina ceramic layer, alumina ceramic layer surface cladding has cadmium-plated layer No. two.

Preferably, recess one end link up the annular plate surface, and the recess symmetry is equipped with a plurality ofly, the fixture block is equipped with a plurality ofly, and the fixture block is corresponding with the recess, is convenient for to the installation of tubular metal resonator.

Preferably, the flange and the fixture block are penetrated by bolts, and the bolts are rotatably connected with the threaded holes, so that the metal pipe is convenient to fix.

Preferably, the baffle is the loop configuration, tubular metal resonator other end edge inlays and has No. two water inflation stagnant water adhesive tapes, and No. two water inflation stagnant water adhesive tapes laminate mutually with the baffle, improves the sealed effect of tubular metal resonator end and feed liquor pipe joint department.

Preferably, the flange outer wall is inlayed and is had a water inflation stagnant water adhesive tape, and a laminating of water inflation stagnant water adhesive tape and feed liquor pipe inner wall improves the sealed effect of metal pipe head end and feed liquor pipe joint department.

Preferably, the impeller is made of manganese steel, the manganese steel is high in hardness and wear-resistant, and the service life of the impeller is prolonged.

The utility model provides a can avoid double entry pump of cavitation erosion possesses following beneficial effect:

(1) the utility model inserts the metal pipe into the liquid inlet pipe, and simultaneously makes the flange at one end of the metal pipe correspond to the annular plate and is connected with the groove arranged on the annular plate through the fixture block, thereby positioning the metal pipe, enabling one end of the bolt to be rotationally connected with the groove by the bolt penetrating through the flange and the clamping block, thereby fixing the metal pipe, jointing the water-swelling water-stopping adhesive tape II with the baffle and jointing the water-swelling water-stopping adhesive tape I with the inner wall of the liquid inlet pipe, improving the sealing effect at the joint of the metal pipe and the liquid inlet pipe, preventing the leakage of water liquid and leading the water liquid to completely pass through the metal pipe, because the first cadmium plating layer is electroplated on the inner wall of the metal tube, the plating layer is relatively stable, the corrosion resistance is strong, the lubricating property is good, can effectively reduce the resistance of water liquid flowing in the metal tube and avoid cavitation at the liquid inlet tube.

(2) The utility model discloses an impeller surface coating has the alumina ceramic layer, and its hardness is big, the wearability is good, can effectual protection impeller to have No. two cadmium-plated layers through the cladding of alumina ceramic layer surface, can effectually make more smooth of impeller surface, resistance when reducing and water contact reduces the production of vacuole, the life-span that the extension impeller used.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure of the liquid inlet pipe of the present invention;

FIG. 3 is a front view of the annular plate of the present invention;

fig. 4 is a schematic view of the metal tube structure of the present invention;

fig. 5 is a schematic structural diagram of the impeller section of the present invention.

In the figure: 1. a housing; 2. a liquid inlet pipe; 201. an annular plate; 202. a groove; 203. a threaded hole; 204. a baffle plate; 3. a metal tube; 301. a flange; 302. a clamping block; 303. a bolt; 304. a water-swelling water-stopping adhesive tape I; 305. a second water-swelling water-stopping adhesive tape; 306. a cadmium plating layer; 4. an impeller; 401. an alumina ceramic layer; 402. and a second cadmium plating layer.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-5, the utility model provides a technical solution: the utility model provides a can avoid double entry pump of cavitation, includes casing 1, the equal fixedly connected with feed liquor pipe 2 in 1 both sides of casing, the annular plate 201 of feed liquor pipe 2 inner wall one end integrated into one piece, annular plate 201 one side surface is seted up recess 202, the inside screw hole 203 that sets up of

recess

202, 2 inner wall other end fixedly connected with baffles 204 of feed liquor pipe, 2 internally mounted of feed liquor pipe have tubular metal resonator 3, 3 one end integrated into one piece of tubular metal resonator have flange 301, flange 301 one side surface fixedly connected with fixture block 302, flange 301 opposite side surface is pegged graft and is had bolt 303, 3 inner wall coatings of tubular metal resonator have cadmium-plated layer 306 No. one, 1 inside rotation of casing is connected with impeller 4, impeller 4 surface cladding has alumina ceramic layer 401, alumina ceramic layer 401 surface cladding has cadmium-plated layer 402 No. two.

The metal pipe 3 is inserted into the liquid inlet pipe 2, the flange 301 at one end of the metal pipe 3 corresponds to the annular plate 201 and is connected with the groove 202 arranged on the annular plate 201 through the fixture block 302, so as to position the metal pipe 3, one end of the bolt 303 is rotatably connected with the groove 202 through the bolt 303 penetrating through the flange 301 and the fixture block 302, so as to fixedly mount the metal pipe 3 and be attached with the baffle 204 through the second water-swelling water-stop rubber strip 305, and the first water-swelling water-stop rubber strip 304 is attached with the inner wall of the liquid inlet pipe 2, so as to improve the sealing effect at the connection part of the metal pipe 3 and the liquid inlet pipe 2, prevent the leakage of the liquid, and ensure that the liquid completely passes through the metal pipe 3, because the cadmium-plated layer 306 is electroplated on the inner wall of the metal pipe 3, the plating layer is more stable, the corrosion resistance is strong, the lubricating performance is good, and the resistance of the liquid when the, avoid appearing the cavitation phenomenon in feed liquor pipe 2 department, have alumina ceramic layer 401 through the cladding of 4 surfaces of impeller, its hardness is big, the wearability is good, can effectual protection impeller 4 to have No. two cadmium-plated layers 402 through the cladding of alumina ceramic layer 401 surfaces, can effectually make 4 surfaces of impeller more smooth, resistance when reducing with water contact reduces the production of vacuole, prolongs the life-span of 4 uses of impeller

One end of the groove 202 penetrates through the surface of the annular plate 201, a plurality of grooves 202 are symmetrically formed, a plurality of clamping blocks 302 are arranged, and the clamping blocks 302 correspond to the grooves 202, so that the metal pipe 3 can be conveniently installed.

The flange 301 and the fixture block 302 are penetrated by bolts 303, and the bolts 303 are rotatably connected with the threaded holes 203, so that the metal pipe 3 is fixed conveniently.

Baffle 204 is the loop configuration, 3 other end edges of tubular metal resonator are inlayed and are had No. two water inflation stagnant water adhesive tape 305, and No. two water inflation stagnant water adhesive tape 305 and baffle 204 laminate mutually, improve the sealed effect of 3 terminal and the 2 junctions of feed liquor pipe of tubular metal resonator.

Flange 301 outer wall is inlayed and is had a water inflation stagnant water adhesive tape 304, and a water inflation stagnant water adhesive tape 304 laminates mutually with 2 inner walls of feed liquor pipe, improves the sealed effect of 3 head ends of tubular metal resonator and 2 junctions of feed liquor pipe.

The impeller 4 is made of manganese steel, and the manganese steel is high in hardness and wear-resistant, so that the service life of the impeller 4 is prolonged.

It should be noted that, in operation, both sides of the casing 1 are fixedly connected with the liquid inlet pipe 2, one end of the inner wall of the liquid inlet pipe 2 is integrally formed with an annular plate 201, one side surface of the annular plate 201 is provided with a groove 202, the groove 202 is internally provided with a threaded hole 203, the other end of the inner wall of the liquid inlet pipe 2 is fixedly connected with a baffle 204, the liquid inlet pipe 2 is internally provided with a metal pipe 3, one end of the metal pipe 3 is integrally formed with a flange 301, one side surface of the flange 301 is fixedly connected with a fixture block 302, the other side surface of the flange 301 is inserted with a bolt 303, the inner wall of the metal pipe 3 is coated with a cadmium plating layer 306, the casing 1 is internally and rotatably connected with an impeller 4, the surface of the impeller 4 is coated with an alumina ceramic layer 401, the surface of the alumina ceramic layer 401 is coated with a cadmium plating layer 402, by inserting the metal pipe 3, the metal pipe 3 is positioned by connecting the fixture block 302 with the groove 202 formed on the annular plate 201, the bolt 303 passes through the flange 301 and the fixture block 302, one end of the bolt 303 is rotatably connected with the groove 202, the metal pipe 3 is installed and fixed, the second water-swelling water-stopping adhesive tape 305 is attached to the baffle 204, the first water-swelling water-stopping adhesive tape 304 is attached to the inner wall of the liquid inlet pipe 2, the sealing effect of the joint of the metal pipe 3 and the liquid inlet pipe 2 is improved, the water leakage is prevented, the water completely passes through the metal pipe 3, the cadmium-plated layer 306 is electroplated on the inner wall of the metal pipe 3, the plating layer is stable, the corrosion resistance is strong, the lubricating property is good, the resistance of the water flowing in the metal pipe 3 can be effectively reduced, the aluminum oxide ceramic layer 401 is coated on the surface of the impeller 4, the hardness is large, the wear resistance is good, and the impeller 4 can be effectively protected, the surface of the aluminum oxide ceramic layer 401 is coated with the second cadmium plating layer 402, the surface of the impeller 4 can be effectively smoother, the resistance in contact with water is reduced, and the generation of vacuoles is reduced, one end of the groove 202 penetrates through the surface of the annular plate 201, the grooves 202 are symmetrically provided with a plurality of grooves, the plurality of clamping blocks 302 are provided, the clamping blocks 302 correspond to the grooves 202, so that the metal pipe 3 can be conveniently installed, the flange 301 and the clamping blocks 302 are penetrated through by the bolts 303, the bolts 303 are rotatably connected with the threaded holes 203, so that the metal pipe 3 can be conveniently fixed, the baffle 204 is of an annular structure, the edge of the other end of the metal pipe 3 is embedded with the second water-swelling water-stopping adhesive tape 305, the second water-swelling water stopping adhesive tape 305 is attached to the baffle 204, the sealing effect of the joint of the tail end of the metal pipe 3 and the liquid inlet pipe 2 is improved, the outer wall of the flange 301 is embedded with the first water-swelling, the sealing effect of the joint of the head end of the metal pipe 3 and the liquid inlet pipe 2 is improved, the impeller 4 is made of manganese steel, the manganese steel is high in hardness and resistant to abrasion, and the service life of the impeller 4 is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A double suction pump capable of avoiding cavitation, comprising a casing (1), characterized in that: the improved cadmium-free battery shell is characterized in that both sides of the shell (1) are fixedly connected with liquid inlet pipes (2), one end of the inner wall of each liquid inlet pipe (2) is integrally formed with an annular plate (201), one side surface of each annular plate (201) is provided with a groove (202), a threaded hole (203) is formed in each groove (202), the other end of the inner wall of each liquid inlet pipe (2) is fixedly connected with a baffle (204), a metal pipe (3) is installed in each liquid inlet pipe (2), one end of each metal pipe (3) is integrally formed with a flange (301), one side surface of each flange (301) is fixedly connected with a fixture block (302), the other side surface of each flange (301) is inserted with a bolt (303), the inner wall of each metal pipe (3) is coated with a cadmium-plated layer (306), the shell (1) is rotatably connected with an impeller, the surface of the aluminum oxide ceramic layer (401) is coated with a second cadmium plating layer (402).

2. A double suction pump capable of avoiding cavitation in accordance with claim 1, wherein: one end of the groove (202) penetrates through the surface of the annular plate (201), a plurality of grooves (202) are symmetrically formed, a plurality of clamping blocks (302) are arranged, and the clamping blocks (302) correspond to the grooves (202).

3. A double suction pump capable of avoiding cavitation in accordance with claim 1, wherein: the flange (301) and the fixture block (302) are penetrated through by bolts (303), and the bolts (303) are rotatably connected with the threaded holes (203).

4. A double suction pump capable of avoiding cavitation in accordance with claim 1, wherein: baffle (204) are the loop configuration, metal pipe (3) other end edge inlays and has No. two water inflation stagnant water adhesive tape (305), and No. two water inflation stagnant water adhesive tape (305) laminate mutually with baffle (204).

5. A double suction pump capable of avoiding cavitation in accordance with claim 1, wherein: flange (301) outer wall is inlayed and is had No. one and meet water inflation stagnant water adhesive tape (304), and No. one meets water inflation stagnant water adhesive tape (304) and feed liquor pipe (2) inner wall and laminates mutually.

6. A double suction pump capable of avoiding cavitation in accordance with claim 1, wherein: the impeller (4) is made of manganese steel.