CN111706514A

CN111706514A - Wear-resistant corrosion-resistant rubber-lined slurry pump

Info

Publication number: CN111706514A
Application number: CN202010425362.0A
Authority: CN
Inventors: 张彦明; 杨文琪; 崇超; 马军令
Original assignee: Sanlian Pump Industry Co Ltd
Current assignee: Sanlian Pump Industry Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-09-25

Abstract

The invention provides a wear-resistant corrosion-resistant rubber-lined slurry pump which comprises a pump body, a main shaft, a main impeller and an abrasive device. A water inlet and a water outlet are formed on two sides of the main impeller, the main impeller is arranged in an inner cavity formed by connecting the pump shell and the pump cover, and a hard lining rubber protective layer is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover; the abrasive device sets up the front end at the water inlet, and the abrasive device includes the abrasive material casing, is equipped with two in the abrasive material casing and rotates the wheel, rotates two and is equipped with the abrasive ball between the wheel, and the abrasive material casing includes the abrasive material shell and rotates the inner shell, it is equipped with rolling mechanism to rotate between inner shell and the abrasive material shell, it is connected to rotate the wheel and arrange in and rotate the inner shell inside and rotate with it. The abrasion capacity of the slurry to the slurry pump is weakened at the source by arranging the grinding device, and the abrasion resistance, the corrosion resistance and the impact resistance of the slurry pump are improved by arranging the hard lining rubber protective layer on the surface of the inner cavity.

Description

Wear-resistant corrosion-resistant rubber-lined slurry pump

Technical Field

The invention belongs to the technical field of water pumps, and particularly relates to a wear-resistant corrosion-resistant rubber-lined slurry pump.

Background

The slurry pump is used for conveying solid-liquid mixture, and is widely used for conveying slurry containing abrasive solid particles in the industries of electric power, metallurgy, coal, coking, environmental protection and the like. Such as an electric desulfurization limestone slurry delivery pump, a gypsum liquid discharge pump, a filter feeding pump, an absorption tower circulating pump, a recovery pump and the like. Such as power plant hydraulic smoke and ash removal, coking desulfurization, heavy medium transportation and the like. In the chemical industry, corrosive slurries containing crystals can also be transported. At present, the service life of the slurry pump is generally short. The existing slurry pump has general wear resistance and corrosion resistance, the pump is a high-consumption product, and the wear resistance problem can not be effectively improved and solved.

Meanwhile, the slurry pump in the prior art can be divided into the following materials: 1. a metal slurry pump, a metal and rubber lining slurry pump, and a metal and ceramic lining slurry pump. Although the metal slurry pump has high strength and good rigidity and toughness, the metal slurry pump has the problems of poor corrosion resistance and wear resistance, frequent replacement of overflowing parts and high equipment maintenance cost; the metal and rubber lined slurry pump has good deformation capability and is resistant to chloride ion corrosion, but the slurry pump also has the problems of easy hydrolysis and falling off, and the use of the slurry pump is influenced; the slurry pump with metal and ceramic lining, especially the slurry pump with silicon carbide ceramic lining, has excellent hardness, high temperature resistance, high corrosion resistance and high wear resistance, and is especially suitable for slurry pump. However, since the silicon carbide ceramic material requires high-temperature sintering, it has high energy consumption, high hardness, difficulty in processing after molding, and difficulty in ensuring precision, and thus, it cannot ensure sealing property, and its brittleness also causes difficulty in connection and fixation with metal, and also has disadvantages of low strength and large brittleness, and it is easy to cause structural damage.

Disclosure of Invention

Aiming at the problems existing in the prior technical scheme, the invention aims to provide a wear-resistant and corrosion-resistant rubber lining slurry pump.

In order to achieve the purpose, the invention provides the following technical scheme:

wear-resisting corrosion resistant lining rubber sediment stuff pump includes:

the pump body comprises a pump shell and a pump cover, and the pump shell and the pump cover are connected to form an inner cavity;

a main shaft disposed in the pump body;

the main impeller is sleeved on the main shaft;

the two sides of the main impeller are not closed to form a water inlet of the pump body; the outer circle of the main impeller is provided with an annular hollow groove to form a water outlet of the pump body, the main impeller is arranged in an inner cavity formed by connecting the pump shell and the pump cover, and a hard lining rubber protective layer is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover;

the lining rubber slurry pump also comprises an abrasive device which is arranged at the front end of the water inlet and comprises an abrasive shell, two rotating wheels are arranged in the abrasive shell, an abrasive ball is arranged between the two rotating wheels, the abrasive shell comprises an abrasive shell and a rotating inner shell, a rolling mechanism is arranged between the rotating inner shell and the abrasive shell, and the rotating wheels are arranged in the rotating inner shell and are connected with the rotating inner shell in a rotating mode.

Furthermore, the abrasive device is connected with a coarse material input pipe, and the coarse material input pipe is communicated with the abrasive shell.

Furthermore, the rolling mechanism comprises a first sliding ring fixedly arranged on the inner wall of the grinding material outer shell and a second sliding ring fixedly arranged on the outer wall of the rotating inner shell, a ball is arranged between the first sliding ring and the second sliding ring, and sliding grooves corresponding to the ball are formed in the first sliding ring and the second sliding ring.

Furthermore, a plurality of flow grooves arranged in an arc shape are formed in the rotating wheel.

Further, the slurry pump further comprises an inducer which is sleeved at two ends of the main shaft.

Furthermore, the end part of the inducer gradually expands outwards from small to large to form a conical structure.

Further, the slurry pump also comprises a sealing ring which is sleeved on the excircle of the main impeller; the main impeller is sealed with the pump body through a sealing ring.

Furthermore, threads are machined at two ends of a main impeller positioning part on the main shaft of the slurry pump, double-circle nuts are respectively installed on the threads at the two ends, and the main impeller is fixed by the double-circle nuts at the two ends.

Further, the main impeller comprises an impeller inlet, a front cover plate and a rear cover plate, an installation shaft hole is formed in the rear cover plate, front blades are arranged between the front cover plate and the rear cover plate, and a plurality of back blades are uniformly distributed on the surface, far away from the front cover plate, of the rear cover plate.

Further, the front blade and the back blade are respectively arc-shaped.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, the hard lining rubber protective layer is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover, so that the wear resistance, corrosion resistance and impact resistance of the slurry pump are improved, the chance of coating cracks is reduced, the wear-resistant protective layer is formed, and the cracking and abrasion of the pump body are effectively prevented.

(2) According to the invention, the grinding device is arranged before the slag charge is fed into the water inlet, and the grinding function of the slurry pump before the charge can be realized by arranging the grinding device, so that the abrasion capability of the slurry pump caused by the slurry is weakened from the source, the abrasion resistance of the slurry pump is improved and the service life of the slurry pump is prolonged.

(3) According to the invention, through the structural design of the impeller, when the impeller works, the back blade and the cover plate rotate together to generate counter pressure, so that the aim of balancing the impeller is fulfilled, the pressure of the impeller is effectively relieved, and the effect of auxiliary sealing is achieved. Due to the back blades, the efficiency of the impeller is greatly improved, the impeller is less impacted by media, the service life of the impeller is effectively prolonged, and the service life of the impeller is greatly prolonged.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of the slurry pump configuration of the present invention;

FIG. 2 is a schematic illustration of the abrasive device of the present invention;

FIG. 3 is a schematic view of the spindle and pump connection of the present invention;

FIG. 4 is a schematic view of the main impeller configuration of the slurry pump of the present invention;

FIG. 5 is a schematic view of the vane arrangement of the slurry pump of the present invention.

The figure is marked with: 1-main shaft, 2-main impeller, 3-pump body, 4-water inlet, 5-water outlet, 6-inducer, 7-sealing ring, 8-rubber lining protective layer, 20-impeller inlet, 21-screw thread, 22-double round nut, 23-front cover plate, 24-front blade, 25-back blade, 26-installation shaft hole, 27-back cover plate, 40-coarse material input pipe, 41-rotating wheel, 42-grinding material ball, 43-ball, 44-rotating inner shell, 45-grinding material outer shell and 46-flow groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the wear-resistant and corrosion-resistant rubber-lined slurry pump of the present embodiment includes a pump body 3, a main shaft 1, a main impeller 2, an abrasive device, and an inducer 6.

The pump body 3 comprises a pump shell and a pump cover, and the pump shell and the pump cover are connected to form an inner cavity; the main shaft 1 is arranged in the pump body 3; the main impeller 2 is sleeved on the main shaft 1;

the two sides of the main impeller 2 are not closed, and a water inlet 4 of the pump body 3 is formed; the outer circle of the main impeller 2 is provided with an annular hollow groove to form a water outlet 5 of the pump body 3, the main impeller 2 is arranged in an inner cavity formed by connecting the pump shell and the pump cover, and a hard lining rubber protective layer 8 is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover.

According to the invention, the hard lining rubber protective layer 8 is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover, so that the wear resistance, corrosion resistance and impact resistance of the slurry pump are improved, the chance of coating cracks is reduced, the wear-resistant protective layer is formed, and the cracking and abrasion of the pump body are effectively prevented.

The abrasive device sets up the front end at water inlet 4, and the abrasive device includes the abrasive material casing, be equipped with two in the abrasive material casing and rotate wheel 41, be equipped with abrasive ball 42 between two rotation wheels 41, the abrasive material casing includes abrasive material shell 45 and rotates inner shell 44, it is equipped with rolling mechanism to rotate between inner shell 44 and the abrasive material shell 45, it is connected to rotate wheel 41 and arrange in and rotate inner shell 44 inside and rotate with it. The abrasive device is connected with a coarse material input pipe 40, and the coarse material input pipe 40 is communicated with the abrasive shell. The rolling mechanism comprises a first slip ring fixedly arranged on the inner wall of the grinding outer shell 45 and a second slip ring fixedly arranged on the outer wall of the rotating inner shell 44, a ball 43 is arranged between the first slip ring and the second slip ring, and sliding grooves corresponding to the ball 43 are formed in the first slip ring and the second slip ring. The rotating wheel 41 is provided with a plurality of arc-shaped flow grooves 46.

In the implementation process of the invention, the slag slurry enters the rotating inner shell 44 through the coarse material input pipe 40 and then passes through the rotating wheel 41, so that the rotating wheel 41 and the rotating inner shell 44 are driven to rotate, the rotating inner shell 44 drives the abrasive balls 42 inside to rotate when rotating, so that the slag slurry is finely ground, large granular substances in the slag slurry are finely ground into small granular substances, the conveying of the slag slurry pump is facilitated, and the damage of the large granular substances to the slag slurry pump is reduced. The abrasive function of the slurry pump before feeding can be realized by arranging the abrasive device, so that the abrasion capacity of the slurry pump to the slurry pump is weakened in source, and the abrasion resistance and the service life of the slurry pump are improved.

The inducer 6 is sleeved at two ends of the main shaft 1. The end part of the inducer 6 gradually expands outwards from small to large to form a conical structure.

The end part of the inducer 6 gradually expands outwards from small to large to form a conical structure. The inducer 6 is sleeved at two ends of the main shaft 1. Under the pressure effect when the inducer rotates, the medium can be ensured to effectively enter the water inlet of the main impeller, so that the steam can not enter the main impeller, and the cavitation phenomenon is avoided. This is a design feature not present in conventional pump bodies.

The slurry pump also comprises a sealing ring 7 which is sleeved on the excircle of the main impeller 2; the main impeller 2 is sealed with the pump body 3 by a seal ring 7. The sealing ring 7 adopts a wedge-shaped structure, has a guiding effect on flowing liquid flow through the sealing surface of the wedge-shaped structure, directly enters the impeller inlet, and has a serious blocking effect on secondary backflow liquid at the impeller inlet, so that the small-flow flowing state is improved, and the high-efficiency area range of the pump is enlarged.

Both ends of the main impeller 2 on the main shaft 1 of the slurry pump are provided with threads 21, the threads at both ends are respectively provided with double-round nuts 22, and the main impeller 2 is fixed by the double-round nuts 22 at both ends.

The main impeller 2 comprises an impeller inlet 20, a front cover plate 23 and a rear cover plate 27, an installation shaft hole 26 is formed in the rear cover plate 27, front blades 24 are arranged between the front cover plate 23 and the rear cover plate 27, and a plurality of back blades 25 are uniformly distributed on the surface of the rear cover plate 27 far away from the front cover plate 23. The front blade 24 and the back blade 25 are respectively arc-shaped. During operation, the back vane rotates together with the cover plate to generate counter pressure, so that the purpose of balancing the impeller is achieved, the pressure of the impeller is effectively relieved, and the effect of auxiliary sealing is achieved. Due to the back blades, the efficiency of the impeller is greatly improved, the impeller is less impacted by media, the service life of the impeller is effectively prolonged, and the service life of the impeller is greatly prolonged.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.

Claims

1. Wear-resisting corrosion resistant lining rubber sediment stuff pump includes:

the pump body (3) comprises a pump shell and a pump cover, and the pump shell and the pump cover are connected to form an inner cavity;

a main shaft (1) disposed in the pump body (3);

the main impeller (2) is sleeved on the main shaft (1);

the device is characterized in that two sides of the main impeller (2) are not closed to form a water inlet (4) of the pump body (3); the outer circle of the main impeller (2) is provided with an annular hollow groove to form a water outlet (5) of the pump body (3), the main impeller (2) is arranged in an inner cavity formed by connecting the pump shell and the pump cover, and a hard lining rubber protective layer (8) is arranged on the surface of the inner cavity formed by connecting the pump shell and the pump cover;

the lining rubber slurry pump still includes an abrasive material device, and it sets up the front end at water inlet (4), and the abrasive material device includes the abrasive material casing, be equipped with two in the abrasive material casing and rotate wheel (41), two are rotated and are equipped with abrasive ball (42) between wheel (41), and the abrasive material casing includes abrasive material shell (45) and rotates inner shell (44), it is equipped with rolling mechanism to rotate between inner shell (44) and abrasive material shell (45), it is connected to rotate wheel (41) and arrange in and rotate inner shell (44) inside and rotate with it.

2. The slurry pump according to claim 1, wherein the abrasive means is connected to a coarse feed pipe (40), the coarse feed pipe (40) communicating with the abrasive housing.

3. The slurry pump according to claim 1, wherein the rolling mechanism comprises a first slip ring fixedly disposed on an inner wall of the outer shell (45) and a second slip ring fixedly disposed on an outer wall of the inner shell (44), and balls (43) are disposed between the first slip ring and the second slip ring, and sliding grooves corresponding to the balls (43) are formed on both the first slip ring and the second slip ring.

4. The wear-resistant and corrosion-resistant rubber-lined slurry pump according to claim 1, wherein the rotating wheel (41) is provided with a plurality of arc-shaped flow grooves (46).

5. The wear-resistant corrosion-resistant rubber-lined slurry pump according to claim 1, further comprising an inducer (6) sleeved at two ends of the main shaft (1).

6. The wear-resistant corrosion-resistant rubber-lined slurry pump according to claim 5, wherein the end of the inducer (6) is gradually expanded outwards from small to large to form a conical structure.

7. The wear-resistant corrosion-resistant rubber-lined slurry pump according to claim 1, further comprising a sealing ring (7) sleeved on the outer circle of the main impeller (2); the main impeller (2) is sealed with the pump body (3) through a sealing ring (7).

8. The wear-resistant corrosion-resistant rubber-lined slurry pump according to claim 1, wherein threads (21) are machined at two ends of the positioning position of the main impeller (2) on the main shaft (1) of the slurry pump, double-round nuts (22) are respectively installed on the threads at the two ends, and the double-round nuts (22) at the two ends fix the main impeller (2).

9. The wear-resistant corrosion-resistant rubber-lined slurry pump according to claim 1, wherein the main impeller (2) comprises an impeller inlet (20), a front cover plate (23) and a rear cover plate (27), a mounting shaft hole (26) is formed in the rear cover plate (27), a front blade (24) is arranged between the front cover plate (23) and the rear cover plate (27), and a plurality of back blades (25) are uniformly distributed on the surface, far away from the front cover plate (23), of the rear cover plate (27).

10. The slurry pump according to claim 9, wherein the front and back vanes (24, 25) are each arcuate.