Horizontal slurry pump with non-clogging large-channel spiral impeller

Abstract

The utility model provides a horizontal slurry pump with a non-clogging large-channel spiral impeller, which is characterized in that the spiral impeller (5) is spirally mounted on a pump shaft (15), spiral blades (51) are arranged on the front surface of a hub cover plate (52), auxiliary blades (53) are arranged on the back surface of the hub cover plate (52), the two spiral blades (51) are of a radial and axial double-twisting structure, the axial section of the front surface of the hub cover plate (52) is curved, and the axial section of the hub cover plate (52) is in a curved surface shape. A cover plate sealing ring (54) and a hub seal (55) are arranged on the back face of the hub cover plate (52), the bearing body (14) is fixed to the top of the bracket base (13), the shaft end seal is arranged at the position of a rear protection plate (7) of the overflowing assembly, and the adjusting ring (11) is installed on a pump shaft (15) between the shaft end seal and the bearing body (14). According to the horizontal slurry pump, the improved spiral impeller (5) structure is adopted, and meanwhile, the front protective plate (2) and the rear protective plate (7) which can axially adjust the gap are matched, so that the conveying requirements of large-particle, high-concentration and high-viscosity slurry are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to horizontal slurry pump technical field, concretely relates to a horizontal slurry pump of big passageway screw impeller without jam. BACKGROUND

[0002] Horizontal slurry pump as important fluid conveying equipment in the industrial field, its overall structure design is exquisite, pump body, impeller, shaft seal device, bearing assembly, transmission part and bracket part and other spare parts work together, complete the high-lift and long-distance conveying of solid particle slurry together, and is widely used in mining, metallurgy, electric power, coal and other industry fields. In the operation process of horizontal slurry pump, due to the rotation of impeller, the blade in the impeller forces fluid medium to rotate, and does work to fluid medium, thereby increasing the pressure potential energy and kinetic energy of fluid medium, and at the same time, fluid flows from the center of impeller to the edge of impeller under the action of inertial force and flows out of impeller at a high speed, enters the volute or press chamber, and is then conveyed to the designated position through the discharge pipeline. The impeller is the key core component of horizontal slurry pump, and the traditional horizontal slurry pump impeller usually adopts closed impeller structure, mainly relies on centrifugal force to make solid-liquid mixed medium obtain energy, and through the rotation of impeller, liquid is thrown from the center of impeller to the edge, so as to realize the conveying of medium, and is commonly used for clean or low-impurity liquid. Although the closed impeller has high efficiency, when conveying high-concentration, high-viscosity fluid medium or gas-liquid mixed, solid-liquid mixed or even solid-liquid gas three-phase mixed fluid medium, the closed impeller flow channel is easy to be blocked, and once the impeller flow channel is blocked, the service life of the whole horizontal slurry pump will be seriously affected. In addition, the closed impeller of horizontal slurry pump is composed of a plurality of blades and front and rear cover plates, when conveying high-concentration, high-viscosity fluid medium or gas-liquid mixed, solid-liquid mixed or even solid-liquid gas three-phase mixed fluid medium, the blades and front and rear cover plates of closed impeller will all be seriously worn and corroded. In order to improve the wear resistance and corrosion resistance of closed impeller, high-wear-resistant materials are usually used, thereby greatly increasing the manufacturing difficulty and cost of closed impeller.

[0003] In order to avoid the closed impeller flow passage blockage problem of the horizontal slurry pump, simultaneously adapt to high concentration, high viscosity fluid medium or gas-liquid mixed, solid-liquid mixed even solid-liquid gas three-phase mixed fluid medium high-lift, large-flow conveying, the utility model patent "horizontal slurry pump with spiral impeller" (application number: 201721565907.8) proposes a spiral impeller structure, the blade of the impeller is spiral, cooperates with three sealing structures of mechanical seal, oil seal and packing seal, lubricating oil water content monitoring and alarm device as auxiliary, realizes the non-blocking, non-overload operation of the slurry pump. The spiral impeller flow passage of the horizontal slurry pump is longer, increases the contact area of the fluid medium and the flow surface of the impeller, is easy to aggravate the wear and corrosion of the flow surface of the impeller, and the hub of the impeller is conical, limits the flow area of the impeller flow passage, affects the flow capacity of the impeller.

[0004] In view of this, in order to meet the conveying requirements of the horizontal slurry pump for special slurry with large particles, high concentration and high viscosity and medium with high gas content, combined with the design concept of the spiral impeller, a horizontal slurry pump with non-blocking large-channel spiral impeller is urgently needed. SUMMARY

[0005] The utility model discloses a horizontal slurry pump with non-blocking large-channel spiral impeller, the spiral impeller of the horizontal slurry pump adopts open impeller structure, the hub adopts streamline structure, the blade adopts radial and axial double twist structure, simultaneously cooperates with the front guard plate and rear guard plate of adjustable clearance in the axial direction, forms the spiral impeller horizontal slurry pump with large flow channel and anti-blocking, solves the technical problem of the horizontal slurry pump conveying large particles, high concentration and high viscosity slurry.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: the horizontal slurry pump with non-blocking large-channel spiral impeller, including pump head and bracket, the pump head includes water inlet short connection, flow assembly, water outlet short connection and shaft end seal, the bracket includes bracket seat and bearing body, the flow assembly includes front guard plate, volute, front pump cover, spiral impeller, rear guard plate and rear pump cover, the shaft end seal includes auxiliary impeller and mechanical seal assembly, the water inlet short connection is installed at the inlet of the front pump cover of the flow assembly through screw, the water outlet short connection is installed at the outlet of the front pump cover and rear pump cover of the flow assembly through bolt, the flow assembly is installed on the bracket seat through the rear pump cover, the spiral impeller of the flow assembly is installed on the shaft end of the pump shaft through the inner hole spiral, the front pump cover and rear pump cover of the flow assembly are connected through bolt and jointly constitute the outer pump shell of the horizontal slurry pump, the front guard plate, volute and rear guard plate of the flow assembly are connected through the clamping groove structure and jointly constitute the inner pump shell of the horizontal slurry pump, the bearing body is fixed on the top of the bracket seat, the shaft end seal is arranged at the rear guard plate of the flow assembly, and the adjusting ring is installed on the pump shaft between the shaft end seal and the bearing body.

[0007] Further, the spiral impeller of the flow assembly comprises spiral blades, a hub cover plate and auxiliary blades, the spiral blades are arranged on the front surface of the hub cover plate, the auxiliary blades are arranged on the back surface of the hub cover plate, the spiral blades are radially and axially twisted, the number of the spiral blades is two and the two spiral blades are symmetrically distributed, the axial section of the front surface of the hub cover plate is curved, the back surface of the hub cover plate is flat, eight auxiliary blades are uniformly distributed on the back surface of the hub cover plate, the auxiliary blades are in the form of curved convex structures, the back surface of the hub cover plate is provided with a cover plate sealing ring, the back surface of the hub cover plate is provided with a hub sealing, the cover plate sealing ring and the hub sealing are in the form of rectangular tooth sealing or spiral sealing structures, and the cover plate sealing ring and the hub sealing jointly form the first stage shaft end sealing structure of the spiral impeller.

[0008] Further, the front guard plate of the flow assembly is connected with the front pump cover of the flow assembly through a stud bolt, the axial gap between the front guard plate and the spiral impeller can be adjusted through the stud bolt, the gap between the flow surface of the front guard plate and the top surface of the spiral blades of the spiral impeller is 1-1.5 mm, and the inner holes of the inlet of the front guard plate and the water inlet short connection are in the form of a cone and jointly form the inlet structure of the horizontal slurry pump.

[0009] Further, the auxiliary impeller of the shaft end sealing is installed in the cavity between the mechanical sealing assembly and the rear guard plate, the blades of the auxiliary impeller are in the form of a rectangle, the number of the blades of the auxiliary impeller is eight and the eight blades are uniformly distributed on the cover plate of the auxiliary impeller, the auxiliary impeller serves as the second stage shaft end sealing structure of the spiral impeller, the mechanical sealing assembly comprises a mechanical seal front cover, a mechanical seal and a mechanical seal rear cover, the mechanical seal is installed in the cavity of the mechanical seal front cover and the mechanical seal rear cover, the top of the mechanical seal rear cover is provided with a mechanical seal cooling water inlet hole and a mechanical seal cooling water outlet hole, and the mechanical sealing assembly forms the third stage shaft end sealing structure of the spiral impeller.

[0010] Further, the adjusting ring is connected through three detachable buckles through screws, each detachable buckle is in the form of a sector and the angle of the sector is 120°.

[0011] Further, O-rings are arranged between the volute of the flow assembly and the front guard plate of the flow assembly and between the volute of the flow assembly and the rear guard plate of the flow assembly.

[0012] The horizontal slurry pump with the non-blocking large-channel spiral impeller is a spiral impeller horizontal slurry pump with a large flow channel and anti-blocking, which is improved and optimized based on the above structure, meets the conveying requirements of high-concentration, high-viscosity fluid media or gas-liquid mixed, solid-liquid mixed and even solid-liquid gas three-phase mixed fluid media, and reduces the occurrence of spiral impeller wear and abrasion. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is Figure 1 the left view of the utility model;

[0015] Figure 3 is the front three-dimensional view of the spiral impeller of the utility model;

[0016] Figure 4 is the back three-dimensional view of the spiral impeller of the utility model;

[0017] Figure 5 is the three-dimensional view of the adjusting ring of the utility model.

[0018] In the figure, marked as: 1: water inlet short connection;2: front guard plate;3: volute;4: front pump cover;5: spiral impeller;51: spiral blade;52: hub cover plate;53: attached blade;54: cover plate sealing ring;55: hub sealing;6: rear pump cover;7: rear guard plate;8: secondary impeller;9: mechanical seal front cover;10: mechanical seal rear cover;11: adjusting ring;111: dismounting buckle;12: water outlet short connection;13: bracket seat;14: bearing body;15: pump shaft. DETAILED DESCRIPTION

[0019] In the description of the utility model, it needs to be explained that the terms "left", "right", "front", "back", "inner", "outer", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model, and are not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0020] In order to make the technical problems, technical schemes and implementation effects to be solved by the utility model clearer, the following will be combined with the drawings Figures 1-5 , a further description will be made on one embodiment of the utility model:

[0021] Reference is made to the drawings Figures 1-5The utility model discloses a no jam big passageway helical impeller's horizontal slurry pump, including pump head and bracket, the pump head includes water inlet short connection 1, flow assembly, water outlet short connection 12 and shaft end seal, the bracket includes bracket seat 13 and bearing body 14, flow assembly includes front baffle 2, volute 3, front pump cover 4, helical impeller 5, rear baffle 7 and rear pump cover 6, the shaft end seal includes auxiliary impeller 8 and mechanical seal assembly, water inlet short connection 1 is installed through screw at the import of flow assembly's front pump cover 4, water outlet short connection 12 is installed through bolt at the export of flow assembly's front pump cover 4 and rear pump cover 6, flow assembly is installed on bracket seat 13 through rear pump cover 6, and the helical impeller 5 of flow assembly is installed through inner hole helix on the shaft end of pump shaft 15, and the front pump cover 4 and rear pump cover 6 of flow assembly are connected through bolt and commonly constitute the outer pump shell of horizontal slurry pump, and the front baffle 2, volute 3 and rear baffle 7 of flow assembly are connected through the card slot structure and commonly constitute the inner pump shell of horizontal slurry pump, and the horizontal slurry pump of double pump shell can separate flow member with outer pump shell, is easy to install and maintain, and in order to improve the wear resistance and corrosion resistance of the inner pump shell of horizontal slurry pump, can use ceramic material or silicon carbide material to make the inner pump shell of horizontal slurry pump, bearing body 14 is fixed on the top of bracket seat 13, and the shaft end seal is arranged at the rear baffle 7 of flow assembly, and the adjusting ring 11 is installed on the pump shaft 15 between the shaft end seal and bearing body 14.

[0022] As a preferred embodiment, refer to the attached Figure 3 and 4 The helical impeller 5 of flow assembly includes spiral blade 51, hub cover plate 52 and auxiliary blade 53, the spiral blade 51 is arranged on the front face of hub cover plate 52, the auxiliary blade 53 is arranged on the back face of hub cover plate 52, the spiral blade 51 is designed according to the theory of fluid mechanics and computational fluid dynamics, the spiral blade 51 is radially and axially twisted structure, the number of spiral blade 51 is two and symmetrically distributed, the axial section of the front face of hub cover plate 52 is curved, the back face of hub cover plate 52 is flat structure, eight auxiliary blades 53 are evenly distributed on the back face of hub cover plate 52, the structure of auxiliary blade 53 is overall curved boss structure, the back face of hub cover plate 52 is provided with cover plate sealing ring 54, the cover plate sealing ring 54 cooperates with the boss structure of rear baffle 7 to form axial gap sealing structure, the back face of hub cover plate 52 is provided with hub seal 55, the hub seal 55 cooperates with the inner hole of rear baffle 7 to form axial gap sealing structure, the cover plate sealing ring 54 and hub seal 55 are rectangular tooth seal or spiral seal structure, and the cover plate sealing ring 54 and hub seal 55 jointly constitute the first stage shaft end sealing structure of helical impeller 5.

[0023] As a preferred embodiment, refer to the attached Figure 3 and 4The spiral impeller 5 of the flow assembly is made by traditional casting process or forging process, and in order to further improve the manufacturability and maintainability of the spiral impeller 5, the spiral impeller 5 can be made by assembling and welding structure, that is, the spiral blades 51 of the spiral impeller 5 are fixed on the hub cover plate 52 of the spiral impeller 5 by welding, and in addition, the cover plate sealing ring 54 and the hub sealing 55 of the spiral impeller 5 can be coated with a wear-resistant coating of hard alloy material by supersonic spraying or plasma surfacing technology.

[0024] As a preferred embodiment, refer to the accompanying drawings Figure 1 and 2 The front guard plate 2 of the flow assembly is connected with the front pump cover 4 of the flow assembly by a double-headed bolt, the axial gap between the front guard plate 2 and the spiral impeller 5 can be adjusted by the double-headed bolt, the gap between the flow surface of the front guard plate 2 and the top surface of the spiral blades 51 of the spiral impeller 5 is 1-1.5 mm, and the inner holes of the inlet of the front guard plate 2 and the water inlet short connection 1 are conical and jointly form the inlet structure of the horizontal slurry pump.

[0025] As a preferred embodiment, refer to the accompanying drawings Figure 1 The auxiliary impeller 8 of the shaft end sealing is installed in the cavity between the mechanical seal assembly and the rear guard plate 7, the blades of the auxiliary impeller 8 are rectangular, the number of the blades of the auxiliary impeller 8 is eight and uniformly distributed on the cover plate of the auxiliary impeller 8, due to the rotation of the auxiliary impeller 8, the slurry pressure at the hub of the auxiliary impeller 8 is reduced, forming the second stage shaft end sealing structure of the spiral impeller 5, the mechanical seal assembly includes a mechanical seal, a front cover 9 and a rear cover 10, the mechanical seal is installed in the cavity of the front cover 9 and the rear cover 10, the top of the rear cover 10 is provided with a mechanical seal cooling water inlet hole and a mechanical seal cooling water outlet hole, and the mechanical seal assembly forms the third stage shaft end sealing structure of the spiral impeller 5.

[0026] As a preferred embodiment, refer to the accompanying drawings Figure 5 The adjusting ring 11 is connected by three detachable buckles 111 through screws, each detachable buckle 111 is fan-shaped and the angle of the fan shape is 120°.

[0027] As a preferred embodiment, by adjusting the connecting bolt between the rear pump cover 6 of the flow assembly and the bracket seat 13, the axial gap between the spiral impeller 5 and the rear guard plate 7 can be adjusted, and at the same time, cooperating with the adjusting ring 11, the mechanical seal assembly and the bearing body 14 are compressed by adjusting the axial width of the adjusting ring 11.

[0028] As a preferred embodiment, O-rings are arranged between the volute 3 of the flow assembly and the front guard plate 2 of the flow assembly, and O-rings are arranged between the volute 3 of the flow assembly and the rear guard plate 7 of the flow assembly.

[0029] As a preferred embodiment, the horizontal slurry pump with the non-clogging large-channel spiral impeller provided by the utility model adopts an open impeller structure to replace a closed impeller structure, improves the flow channel structure of the open impeller by using fluid mechanics and computational fluid dynamics theory, designs a double-flow-channel spiral impeller 5, develops a spiral blade 51 with a radial and axial double-torsion structure by combining with CFD technology, optimizes the flow channel structure and hydraulic performance of the spiral impeller 5, develops a hub structure of the spiral impeller 5 with a streamline structure to solve the problem of blockage of the horizontal slurry pump, effectively increases the flow area of the spiral impeller 5, and simultaneously, the conical inlet flow channel formed by the water inlet short circuit 1 and the front guard plate 2 of the horizontal slurry pump can enhance the flow capacity of the slurry into the inlet of the spiral impeller 5, and the adjustable axial gap structure design between the spiral impeller 5 and the front guard plate 2 and the rear guard plate 7 can effectively adjust the flow assembly structure of the horizontal slurry pump, and improves the ability of the horizontal slurry pump to adapt to different operating conditions. In addition, the horizontal slurry pump with the non-clogging large-channel spiral impeller provided by the utility model sets the spiral impeller 5 first-stage shaft end sealing structure formed by the cover plate sealing ring 54 and the hub sealing 55, the second-stage shaft end sealing structure based on the auxiliary impeller 8 and the third-stage shaft end sealing structure based on the mechanical sealing assembly to avoid leakage of the slurry, simultaneously cooperates with the O-ring sealing structure between the volute 3 and the front guard plate 2 and the rear guard plate 7, and further ensures the sealing performance of the horizontal slurry pump.

[0030] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A horizontal slurry pump with no blockage large channel spiral impeller, comprising a pump head and a bracket, the pump head comprises a water inlet short circuit (1), a flow assembly, a water outlet short circuit (12) and a shaft end seal, the bracket comprises a bracket seat (13) and a bearing body (14), the flow assembly comprises a front guard plate (2), a volute (3), a front pump cover (4), a spiral impeller (5), a rear guard plate (7) and a rear pump cover (6), the shaft end seal comprises a secondary impeller (8) and a mechanical seal assembly, characterized in that: The inlet short connection (1) is installed on the inlet of the front pump cover (4) of the flow assembly by screws, the outlet short connection (12) is installed on the outlet of the front pump cover (4) and the rear pump cover (6) of the flow assembly by bolts, the flow assembly is installed on the bracket base (13) through the rear pump cover (6), the spiral impeller (5) of the flow assembly is installed on the shaft end of the pump shaft (15) through the inner hole screw, the bearing body (14) is fixed on the top of the bracket base (13), the shaft end seal is arranged at the rear baffle (7) of the flow assembly, and the adjusting ring (11) is installed on the pump shaft (15) between the shaft end seal and the bearing body (14).

2. The horizontal slurry pump with no-clog large passage spiral impeller according to claim 1, characterized in that: The spiral impeller (5) of the flow assembly comprises spiral blades (51), a hub cover plate (52) and auxiliary blades (53), the spiral blades (51) are arranged on the front surface of the hub cover plate (52), the auxiliary blades (53) are arranged on the back surface of the hub cover plate (52), the spiral blades (51) are in a radial and axial double-twisted structure, the number of the spiral blades (51) is two and they are symmetrically distributed, the axial section of the front surface of the hub cover plate (52) is a curved surface, the back surface of the hub cover plate (52) is a plane structure, eight auxiliary blades (53) are uniformly distributed on the back surface of the hub cover plate (52), the structure of the auxiliary blades (53) is a curved convex structure as a whole, the back surface of the hub cover plate (52) is provided with a cover plate sealing ring (54), the back surface of the hub cover plate (52) is provided with a hub seal (55), and the cover plate sealing ring (54) and the hub seal (55) are both rectangular tooth sealing or spiral sealing structures.

3. The horizontal slurry pump with no-clog large passage spiral impeller according to claim 1, characterized in that: The front baffle (2) of the flow assembly is connected with the front pump cover (4) of the flow assembly through double-headed bolts, the gap between the flow surface of the front baffle (2) and the top surface of the spiral blades (51) of the spiral impeller (5) is 1-1.5 mm, the inlet of the front baffle (2) and the inner hole of the inlet short connection (1) are both conical and jointly constitute the inlet structure of the horizontal slurry pump.

4. The horizontal slurry pump with no-clog large passage spiral impeller according to claim 1, characterized in that: The auxiliary impeller (8) of the shaft end seal is installed in the cavity between the mechanical seal assembly and the rear baffle (7), the blades of the auxiliary impeller (8) are rectangular, the number of the blades of the auxiliary impeller (8) is eight and they are uniformly distributed on the cover plate of the auxiliary impeller (8), the mechanical seal assembly of the shaft end seal comprises a front cover (9), a mechanical seal and a rear cover (10), the mechanical seal is installed in the cavity between the front cover (9) and the rear cover (10), and the top of the rear cover (10) is provided with a cooling water inlet hole and a cooling water outlet hole.

5. The horizontal slurry pump with no-clog large passage volute screw impeller according to claim 1, characterized in that: The adjusting ring (11) is connected by three detachable buckles (111) through screws, each detachable buckle (111) is fan-shaped and the angle of the fan shape is 120°.

6. The horizontal slurry pump with no-clog large passage volute screw impeller according to claim 1, characterized in that: O-rings are arranged between the volute (3) of the flow assembly and the front baffle (2) of the flow assembly and between the volute (3) of the flow assembly and the rear baffle (7) of the flow assembly.

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