CN113107857A

CN113107857A - Cutting assembly of cutting pump

Info

Publication number: CN113107857A
Application number: CN202110445599.XA
Authority: CN
Inventors: 李志远; 张留; 柴春苗; 郝福合; 郭倩; 薛梅; 郭素英; 张宁宁; 周长帅; 郭怀波
Original assignee: Jining Antai Mine Equipment Manufacturing Co ltd
Current assignee: Jining Antai Mine Equipment Manufacturing Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-07-13

Abstract

The invention relates to the technical field of cutting pumps, in particular to a cutting assembly of a cutting pump, which comprises a pump cover, a volute and a semi-open impeller, wherein the pump cover is arranged at the lower part of the volute, the semi-open impeller is arranged in the volute in a rotating mode, the pump cover is provided with a water inlet channel, the water inlet channel is formed by enclosing a plurality of arc walls, the arc walls are uniformly arranged along the circumference by taking the axis of the pump cover as the circle center, the cross section of each arc wall comprises a first arc section and a second arc section, and the adjacent first arc sections are connected end to end through the second arc sections; the semi-open impeller is coaxially provided with a cutting knife which extends into the bottom of the water inlet channel, so that the water inlet area is increased, and the centrifugal fibrous object rotates and gathers in the arc wall and is kneaded into a strip-shaped object, so that the semi-open impeller is convenient to cut; the cutting knife cooperates with the water inlet channel, can prevent solid impurity from piling up in the middle of the semi-open impeller and causing the jam, increases the practical efficiency of cutting pump.

Description

Cutting assembly of cutting pump

The technical field is as follows:

the invention relates to the technical field of cutting pumps, in particular to a cutting assembly of a cutting pump.

Background art:

the cutting pump is one kind of blowdown type water pump, there are a pack of high strength cutting type impellers of bottom to cooperate with cutting disc, make the cutting pump can cut up and discharge smoothly dross, plastic products and fibrous material under the abominable condition, the existing cutting assembly utilizes the semi-open impeller to suck the incidental into the volute through the water inlet, because the inertial force and centripetal force function will partly accumulate in the middle of the semi-open impeller, can't be sucked into the inside of the semi-open impeller to cut directly, and cause and block up; and part of fibrous objects are not thoroughly crushed and wound on the impeller, so that the cutting effect is poor.

The invention content is as follows:

in order to solve the technical problems, the invention provides a cutting assembly of a cutting pump, which solves the technical problems that: part of objects are accumulated in the middle of the semi-open impeller, the water inlet area is small, the sundries crushing effect is poor, and the fiber-like objects are not crushed thoroughly. In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a cutting assembly of a cutting pump comprises a pump cover, a volute and a semi-open impeller, wherein the pump cover is arranged at the lower part of the volute, the semi-open impeller is arranged inside the volute in a rotating mode, a water inlet channel is arranged on the pump cover and is formed by enclosing a plurality of arc walls, the arc walls are uniformly arranged along the circumference by taking the axis of the pump cover as the circle center, the cross section of each arc wall comprises a first arc section and a second arc section, and the adjacent first arc sections are connected end to end through the second arc sections; the semi-open impeller is coaxially provided with a cutting knife which extends into the bottom of the water inlet channel.

Furthermore, the water inlet channel is of a spiral structure along the axial direction, the first arc section and the second arc section deflect along the axis of the pump cover, the deflection angle is gamma, and the gamma range is more than 0 degree and less than or equal to 90 degrees.

Furthermore, one end of the first arc segment is externally tangent to the circumference, the other end of the first arc segment is internally tangent to one end of the second arc segment, and the other end of the second arc segment is connected with the adjacent first arc segment.

Further, the joint of the adjacent arc walls forms a blade or a sawtooth.

Furthermore, the cutting knife comprises a base and a blade, the base and the semi-open type impeller are coaxially and fixedly arranged, and the blade extends into the bottom of the water inlet.

Furthermore, the blade is provided with a blade edge or a sawtooth edge.

Further, an eccentric circular groove and a sewage discharge groove are formed in the inner side of the pump cover.

The invention has the beneficial effects that: according to the invention, the water inlet channel is formed by uniformly combining a plurality of arc walls, so that the water inlet area is increased, and the centrifugal fibrous object rotates and gathers in the arc walls and is kneaded into a strip-shaped object, so that the dispersion is prevented, and the semi-open impeller is convenient to cut; the intersection of one end of the first arc section and one end of the second arc section forms a barb type structure, dispersed fibrous impurities can be hooked, and the long fibrous objects are further cut and shredded to prevent the long fibrous objects from winding the impeller by arranging a cutting knife to be matched with the barb type structure; the cutting knife cooperates with the water inlet channel, can prevent solid impurity from piling up in the middle of the semi-open impeller and causing the jam, increases the practical efficiency of cutting pump.

Description of the drawings:

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a perspective view of the pump cover of the present invention;

fig. 3 is a schematic diagram of the cross-sectional structure of the pump cover of the present invention.

In the figure:

1. pump cover, 2, spiral case, 3, semi-open impeller, 4, circular arc wall, 41, first circular arc section, 42, second circular arc section, 5, cutting knife, 51, base, 52, blade, 6, circumference, 7, eccentric circular slot, 8, blowdown groove.

The specific implementation mode is as follows:

to further clarify the objects, technical solutions and advantages of the present invention, the present invention will now be described in further detail with reference to fig. 1-3 and examples to better understand the method of the present invention by the public, and the specific embodiments of the present invention are:

the first embodiment is as follows: a cutting assembly of a cutting pump comprises a pump cover 1, a volute 2 and a semi-open impeller 3, wherein the pump cover 1 is arranged at the lower part of the volute 2, the semi-open impeller 3 is arranged inside the volute 2 in a rotating mode, blades arranged along the circumference are arranged on the semi-open impeller 3, a water inlet channel is arranged on the pump cover 1, and the water inlet channel is formed by surrounding a plurality of arc walls 4; the circular arc wall 4 is uniformly arranged along the circumference 6 by taking the axis of the pump cover 1 as a circle center, the cross section of the circular arc wall 4 comprises a first circular arc section 41 and a second circular arc section 42, the adjacent first circular arc sections 41 are connected end to end through the second circular arc section 42, the structure divides a single water inlet into a large water suction port and a plurality of vortex-shaped small water suction ports, each small water suction port is provided with a water flow entering the volute 2, when the semi-open impeller 3 rotates and the cutting knife 5 rotates, pressure difference is generated to promote the peripheral flow velocity of the suction port to be increased, simultaneously, the principle of generating a central cavity and increasing the centrifugal force of throwing out impurities is destroyed, and the accumulation of the impurities at the central position is; and the fibrous sundries rotate along with the water flow in the small suction port and are further kneaded into strips, so that the cutting is convenient; half open impeller 3 is coaxial to be provided with cutting knife 5, and cutting knife 5 stretches into the inhalant canal bottom, and the debris in the middle of the 5 disturbances of cutting knife is broken up it, further prevents that debris from piling up.

One end of the first arc segment 41 is circumscribed with the circumference 6, the other end of the first arc segment 41 is inscribed with one end of the second arc segment 42, the tangent structure enables water flow to be smoother, vortexes are formed more easily, and the other end of the second arc segment 42 is connected with the adjacent first arc segment 41.

The joint of the adjacent arc walls 4 forms a blade or a sawtooth which can hook the fiber which is not kneaded into a strip shape.

The cutting knife 5 comprises a base 51 and a blade 52, the base 51 and the semi-open impeller 3 are coaxially and fixedly arranged, the blade 52 extends into the bottom of the water inlet, the blade 52 rotates in the water inlet channel, a cutting edge or a sawtooth blade is arranged on the blade 52, fibers hooked in the water inlet channel are shredded, and long fibers are prevented from entering the pump shell and winding the impeller.

The inner side of the pump cover 1 is provided with an eccentric circular groove 7 and a sewage discharge groove 8, fibers kneaded into a strip shape enter the volute 2, the semi-open impeller 3 and the eccentric circular groove 7 are matched to extrude and shear the fibers, so that sundries are changed into a fragmentary or fine particle state, and the sewage discharge groove 8 can prevent the sundries from being accumulated in the volute 2 to cause the semi-open impeller 3 to be blocked.

Example two: on the basis of the first embodiment, the water inlet channel is arranged to be of a spiral structure along the axial direction, the spiral rotating direction is the same as the rotating direction of the semi-open impeller 3, the first arc section 41 and the second arc section 42 deflect along the axis of the pump cover 1, the deflection angle is gamma, the gamma range is more than 0 degrees and less than or equal to 90 degrees, water flow is smoother when passing through the water inlet channel, and the water inlet channel rotates like a vortex in each small water suction port; in the embodiment, γ is set to 20 °, in other embodiments, γ may also be set to 5 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 °, 90 °, or other angles; one end of the first arc segment 41 is circumscribed with the circumference 6, the other end of the first arc segment 41 is inscribed with one end of the second arc segment 42, the tangent structure enables water flow to be smoother, vortexes are formed more easily, and the other end of the second arc segment 42 is connected with the adjacent first arc segment 41.

In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "front", "rear", "left lower", "right upper", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein.

It should also be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The present invention has been disclosed with respect to the scope of the invention, which is to be determined from the following claims and not by way of limitation.

Claims

1. A cutting assembly of a cutting pump, characterized in that: the pump cover comprises a pump cover (1), a volute (2) and a semi-open impeller (3), wherein the pump cover (1) is arranged at the lower part of the volute (2), the semi-open impeller (3) is arranged inside the volute (2) in a rotating mode, a water inlet channel is arranged on the pump cover (1), the water inlet channel is formed by enclosing a plurality of arc walls (4), the arc walls (4) are uniformly arranged along a circumference (6) by taking the axis of the pump cover (1) as a circle center, the cross section of each arc wall (4) comprises a first arc section (41) and a second arc section (42), and adjacent first arc sections (41) are connected end to end through the second arc sections (42); the semi-open impeller (3) is coaxially provided with a cutting knife (5), and the cutting knife (5) extends into the bottom of the water inlet channel.

2. The cutting assembly of a cutting pump of claim 1, wherein: the water inlet channel is in a spiral structure along the axial direction, the first arc section (41) and the second arc section (42) deflect along the axis of the pump cover (1) and the deflection angle is gamma, and the gamma range is more than 0 degree and less than or equal to 90 degrees.

3. The cutting assembly of a cutting pump of claim 2, wherein: one end of the first circular arc section (41) is externally tangent to the circumference (6), the other end of the first circular arc section (41) is internally tangent to one end of the second circular arc section (42), and the other end of the second circular arc section (42) is connected with the adjacent first circular arc section (41).

4. The cutting assembly of a cutting pump of claim 1, wherein: the joint of the adjacent arc walls (4) forms a blade or a sawtooth.

5. The cutting assembly of a cutting pump of claim 1, wherein: the cutting knife (5) comprises a base (51) and a blade (52), the base (51) and the semi-open impeller (3) are coaxially and fixedly arranged, and the blade (52) extends into the bottom of the water inlet.

6. The cutting assembly of a cutting pump of claim 5, wherein: the blade (52) is provided with a blade edge or saw teeth.

7. The cutting assembly of a cutting pump of claim 1, wherein: the inner side of the pump cover (1) is provided with an eccentric circular groove (7) and a sewage draining groove (8).