CN210599450U

CN210599450U - Fixed blade

Info

Publication number: CN210599450U
Application number: CN201920874623.XU
Authority: CN
Inventors: 赖华煌; 龚伟; 蓝风翔; 徐焱信; 李丽莉
Original assignee: South China Pump Industry Ganzhou Co ltd
Current assignee: South China Pump Industry Ganzhou Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-05-22
Anticipated expiration: 2029-06-12

Abstract

The utility model belongs to the technical field of the water pump, in order to solve the current problem that stealthily dirty pump blockked up easily, the utility model discloses a dirty pump is stealthily high-efficient stealthily of fixed sword and multistage cutting, wherein, fixed sword includes: the cutting device comprises a groove body/a fixed blade sleeve, an outer ring and a fixed blade slice, wherein the fixed blade slice is fixedly connected between the groove body and the outer ring, or the fixed blade slice is fixedly connected between the fixed blade sleeve and the outer ring. The utility model discloses a fixed sword can realize stealthily dirty pump's multistage cutting.

Description

Fixed blade

Technical Field

The utility model relates to a water pump technical field, concretely relates to fixed sword.

Background

The description of the background art pertaining to the present invention is provided for the purpose of illustration and understanding only, and is not intended to be construed as an admission that the applicant specifically believes or is believed to be the prior art in the filing date of the first filing date of the present invention.

The traditional submersible sewage pump generally discharges sewage containing solid by using a method of enlarging the flow area of an impeller blade, and the sewage in a sewage pipe network is very complex in solid content and generally has objects easy to wind. Meanwhile, the impeller needs to consider that a flow channel needs to pass through solids when in design, so that the streamline of an impeller blade cannot be designed according to the optimal flow state, the impeller blade is a design method for increasing the dirt passing performance by sacrificing the operation efficiency of a water pump, and the efficiency of the sewage pump is greatly reduced compared with that of a traditional centrifugal pump by the method. And because the whole flow passage of the pump is enlarged, the sewage pump with the same flow rate as the pump is heavy and bulky compared with the centrifugal pump.

Traditional sewage pump of taking cutting function: the traditional sewage pump with the cutting function generally adopts a structural form with an open type cutting knife, namely, when the dirt of an object passes through the water pump, the cutting knife can carry out open type cutting on the object once; in this way, only one rough cut can be made on the dirt; because the rotating speed of the water pump is constant, the cutting edges of the cutting knives cannot be arranged too densely, and the flowing performance of the water pump is influenced by the too dense arrangement; therefore, the cutting pump cannot completely cut or break dirt, and finally, the water pump is blocked and cannot run; meanwhile, due to the existence of the open type cutting knife, reverse flow is generated to a suction inlet of the water pump, so that the cavitation performance of the water pump is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a fixed sword is provided, the utility model discloses a fixed sword can realize stealthily dirty pump's multistage cutting.

The embodiment of the utility model provides an aim at is realized through following technical scheme:

an embodiment of the first aspect of the present invention provides a fixed blade, including: the first fixed blade section is connected and fixed between the groove body and the first outer ring.

An embodiment of the second aspect of the present invention provides a fixed blade, including: a first fixed edge and a second fixed edge,

the first fixed blade includes: the first fixed blade slice is fixedly connected between the groove body and the first outer ring;

the second fixed blade includes: the second fixed blade section is fixedly connected between the second fixed blade sleeve and the second outer ring.

Further, the number of the second fixed-edge slices is larger than that of the first fixed-edge slices.

Further, the number of the first fixed-blade segments is 3, and the number of the second fixed-blade segments is 6.

Furthermore, the first fixed blade slices are uniformly distributed in a radial shape along the outer wall of the groove body; the second fixed blade slices are uniformly distributed along the outer wall of the second fixed blade sleeve.

Furthermore, the first fixed blade slices are distributed along the outer wall of the groove body in an annular zigzag manner; the second fixed blade slices are distributed along the outer wall of the second fixed blade sleeve in an annular zigzag manner.

Borrow by above-mentioned scheme, the utility model relates to a fixed sword possesses following beneficial effect at least:

the utility model discloses a fixed sword can overlap and establish in the pivot, and the cooperation of a plurality of fixed sword and cutting edge realizes filth multistage cutting, and the cutting effect is good.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described as follows:

FIG. 1 is a schematic structural view of a conventional submersible sewage pump in a multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 2 is a schematic view of a first fixed blade of an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 3 is a schematic structural view of the first fixed blade in the direction A in an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 4 is a schematic view of a second fixed blade of an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 5 is a schematic structural view of the second fixed blade in the direction A in an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 6 is a schematic structural view of a multi-stage cutting high-efficiency submersible sewage pump in an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 7 is a schematic view of a cutting blade structure in an embodiment of the multi-stage cutting high-efficiency submersible sewage pump of the present invention;

FIG. 8 is a top view of FIG. 7 of a multi-stage cutting high efficiency submersible sewage pump of the present invention;

fig. 9 is the front view of fig. 7 in the high-efficient submersible sewage pump of multi-stage cutting of the utility model.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which should be understood by those skilled in the art to understand the technical solutions of the present invention more easily, and should not be taken as a limitation of the protection scope of the present invention.

In the following description, the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance. The following description provides embodiments of the invention, which may be combined or substituted for various embodiments, and is intended to include all possible combinations of the same and/or different embodiments described herein. Thus, if one embodiment includes feature A, B, C and another embodiment includes feature B, D, the invention should also be construed as including embodiments that include all other possible combinations of one or more of A, B, C, D, even though such embodiments may not be explicitly recited in the following text.

Referring to fig. 1, the conventional submersible sewage pump includes a pump body 101, an impeller 102, a fixed blade 103, a cutting blade 104 and an external motor 105, the fixed blade 103 is fixed on the periphery of the water inlet of the pump body 1 of the conventional submersible sewage pump, the outer edge of the cutting blade 104 is in clearance fit with the inner wall of the fixed blade 103, when impurities enter, the cutting blade rotates, and the impurities are cut by the cooperation of the outer edge of the cutting blade 103 and the inner wall of the fixed blade.

The submersible sewage pump with the structure has the following disadvantages:

(1) the entanglement can be continuously wound on the impeller when the pump pumps the easy entanglement, and finally the impeller flow channel is blocked along with the increase of the entanglement, so that the water pump cannot run.

(2) The design method that the flow channel needs to pass through solids and the operating efficiency of the water pump is sacrificed to increase the passing performance of the dirt needs to be considered when the guide impeller is designed, so that the efficiency of the sewage pump is greatly reduced compared with that of the traditional centrifugal pump.

(3) Only one coarse cutting can be carried out on the dirt; the blades of the cutting knives are arranged too densely, which can affect the flow performance of the water pump; the inability to completely cut or break the dirt eventually results in a clogged pump that is inoperable.

(4) Meanwhile, due to the existence of the open type cutting knife, reverse flow is generated to a suction inlet of the water pump, so that the cavitation performance of the water pump is poor.

The solution of the present invention will be further explained in detail with reference to the accompanying fig. 2-9:

in order to solve the above problems, the applicant has conducted extensive studies and has devised a fixed blade including: the first fixed blade slice 2033 is fixedly connected between the groove body 2031 and the first outer ring 2032.

In other embodiments of the present invention, a fixed blade includes: the cutting tool comprises a fixed edge sleeve 2041, a first outer ring 2042 and a first fixed edge slice 2043, wherein the first fixed edge slice 2043 is fixedly connected between the groove body 2041 and the second outer ring 2042.

the first fixing blade 203 includes: a groove body 2031, wherein the groove body 2031 is buckled at the front end of the rotating shaft 214; a first outer ring 2032 and a first fixed blade slice 2033, wherein the first fixed blade slice is fixedly connected between the groove body 2031 and the first outer ring 2032;

the second fixed edge 204 includes: the second fixed-blade sleeve 2041, the second fixed-blade sleeve 2041 is arranged on the rotating shaft 214; a second outer ring 2042 and a second fixed-edge slice 2043, wherein the second fixed-edge slice 2043 is fixedly connected between the second fixed-edge sleeve 2041 and the second outer ring 2042.

In some embodiments of the present invention, the number of the second fixed-blade slices 2042 is greater than the number of the first fixed-blade slices 2032.

In some embodiments of the present invention, the number of the first fixed-blade sections 2032 is 3, and the number of the second fixed-blade sections 2032 is 6.

In the present invention, the number of the first fixed blade slice and the second fixed blade slice is not specifically limited, and different numbers are adopted according to different requirements of sewage, environment, flow rate, etc. in other embodiments of the present invention, the number of the first fixed blade slice may also be 4, 6, 7, etc., and in other embodiments of the present invention, the number of the second fixed blade slice may also be 8, 10, 12, etc.; for the size relation between the number of the first fixed-blade slices and the number of the second fixed-blade slices, the utility model discloses do not specifically limit, it should be understood that, in order to strengthen the cutting effect, the secondary cutting should be better than the primary cutting effect, in some embodiments, the number of the second fixed-blade slices is greater than the number of the first fixed-blade slices, as in other embodiments, the number of the first fixed-blade slices is 4, and the number of the second fixed-blade slices is 8, of course, in other embodiments, the number of the first fixed-blade slices and the number of the second fixed-blade slices can also be selected as required.

In some embodiments of the present invention, the first fixed blade slices 2033 are uniformly distributed radially along the outer wall of the groove 2031; the second fixed-edge slices 2043 are uniformly distributed along the outer wall of the second fixed-edge sleeve 2041.

In some embodiments of the present invention, the first fixed blade slices 2033 are distributed along the outer wall of the groove 2031 in an annular zigzag shape; the second fixed-edge slice 2043 is annularly distributed along the outer wall of the second fixed-edge sleeve 2041 in a zigzag manner.

It should be understood that, whether the first fixed-edge slice and the second fixed-edge slice are uniformly distributed or not is not limited herein, and in order to improve the cutting efficiency and effect, the first fixed-edge slice and the second fixed-edge slice are uniformly distributed, and can be cut sufficiently in a limited space. The water inlet of the pump body 201 is provided with a first fixed blade 203 and a second fixed blade 204, and a cutting blade 205 is arranged between the first fixed blade 203 and the second fixed blade 204;

the blade cascade structure comprises a sleeve and a blade cascade fixed on the sleeve, wherein the blade cascade is a spiral blade cascade, and the spiral angle of the spiral blade cascade is in a lead angle type; the cutting blade is sleeved on a rotating shaft of the submersible sewage pump, and the rotating shaft and the cutting blade drive the cutting blade to rotate through key transmission;

the cutting edge 205 is in clearance fit with the first fixed edge 203, and the cutting edge 205 rotates to be matched with the first fixed edge 203 to cut impurities for the first time;

the cutting edge 205 is in clearance fit with the second fixed edge 204, and the cutting edge 205 rotates to be matched with the second fixed edge 204 to cut the impurities for the second time.

In some embodiments of the present invention, the multi-stage cutting high-efficiency submersible sewage pump comprises a rotating shaft 214 connected with the impeller 202, the cutting edge 205 comprises a sleeve 2051 and a blade grid 2052 fixed on the sleeve 2051, and the sleeve 2051 is sleeved on the rotating shaft 214 and rotates with the rotating shaft 214.

It should be noted that the present invention is not limited to the specific manner of providing the power for fixing and rotating the cutting edge 205, in order to synchronize the movement of the fluid, it is common to fix the cutting edge 205 to the shaft 214, rotate with the shaft 214, it should be understood that the present invention is not limited to the fixing manner of the cutting edge 205 on the rotating shaft 214, in some embodiments of the present invention, the rotating shaft 214 drives the cutting edge 205 to rotate through key transmission, the rotating shaft 214, the key 211 and the cutting edge 205 are fixed by a set screw 212 (as shown in fig. 6), the rotating shaft 214 and the impeller 202 are fixed by an impeller fixing nut 210, the pump cover 206 and the oil chamber cover 207 are shown in fig. 6, the structures of the pump cover 206, the oil chamber cover 207, the impeller 202, and the like shown in the drawings are drawn only for the convenience of those skilled in the art to understand the present invention, and are not intended to limit the structure of the submersible sewage pump of the present invention.

The cutting edge of the submersible sewage pump is positioned at the front end of the impeller and is positioned between the two fixed edges; therefore, the cutting edge, the second fixed edge and the first fixed edge form two cutting positions at the same time, and the cutting positions are divided into two parts in sequence when the impeller sucks dirt. The impeller inhales sewage filth, and the cutting sword rotates, receives the cutting for the first time when the filth passes through the handing-over position of cutting sword and first fixed sword, continues to move as the filth, receives the cutting for the second time when the handing-over position of cutting sword and second fixed sword, so make the filth in the sewage can be by complete shredding, then along with liquid flows together and is walked by the impeller to make impeller and pump can not cause the jam.

As shown in fig. 7-9, in some embodiments of the present invention, the cascade 2051 is a spiral cascade having a pitch angle in a delta manner. In some embodiments of the present invention, the spiral blade grid is a three-blade type.

Because the cutting edge is a trefoil type lead angle spiral blade cascade, when the blade cascade rotates along with the shaft, the helix angle of the blade cascade is lead angle type, and fluid can move vertically when rotating, thereby playing the role of inlet fluid pressurization and improving the cavitation performance of the water pump.

In some embodiments of the present invention, the inlet end of the spiral blade grid is an acute angle, and the outlet end is a right angle. When rotating, the fluid can move vertically, so that the inlet fluid is pressurized, and the cavitation performance of the water pump is improved.

In some embodiments of the present invention, the first fixing blade 203 comprises: a groove body 2031, wherein the groove body 2031 is buckled at the front end of the rotating shaft 214; a first outer ring 2032 and a first fixed blade slice 2033, wherein the first fixed blade slice is fixedly connected between the groove body 2031 and the first outer ring 2032;

It should be noted here that, what kind of material is adopted to first fixed sword and the fixed sword of second, and size etc. do not do specifically and restrict, can design according to the size of water inlet, select suitable fixed sword sliced quantity and material according to the difference of filth the utility model discloses a some embodiments, the material is the stainless steel, can be other materials in other embodiments, no longer describe herein.

It should be understood that, whether the first fixed-edge slice and the second fixed-edge slice are uniformly distributed or not is not limited herein, and in order to improve the cutting efficiency and effect, the first fixed-edge slice and the second fixed-edge slice are uniformly distributed, and can be cut sufficiently in a limited space.

According to the working principle, the external motor 213 is started, the external motor 213 drives the impeller 202 to rotate, the cutting edge 205 is driven to rotate, the cutting edge 205 is matched with the first fixed edge 203 to cut the sundries for the first time, the sundries reach the second fixed edge 204 along with the continuous movement of the sundries, and the cutting edge 205 is matched with the second fixed edge 204 to cut the sundries for the second time.

The cutting edge is positioned at the front end of the impeller and is positioned between the two fixed edges; the cutting edge rotates along with the shaft through key transmission, so that the cutting edge, the second fixed edge and the first fixed edge form two cutting positions simultaneously, and the cutting positions are divided into two parts according to the cutting time when the impeller sucks dirt to move. So, when the pump starts, impeller and cutting edge rotate together, and the sewage filth is inhaled to the impeller, receives the first time cutting when the filth passes through the handing-over position of cutting edge and first fixed sword, continues to move as the filth, receives the second time cutting when the handing-over position of cutting edge and second fixed sword, so makes the filth in the sewage can be by complete shredding, then flows along with liquid and is carried away by the impeller to make impeller and pump can not cause the jam.

And because the cutting edge is a trefoil type ascending angle spiral blade cascade, when the blade cascade rotates along with the shaft, the helix angle of the blade cascade is ascending angle type, and fluid can move vertically when rotating, thereby playing a role of pressurizing inlet fluid and improving the cavitation performance of the water pump.

Based on above-mentioned advantage, make the impeller need not to consider the trafficability characteristic and the jam of sewage filth when the design, need not to consider the suction performance of impeller, cavitation performance for impeller blade can design according to the streamline most reasonable completely, and the present case impeller design is centrifugal big wrap angle impeller blade, has the high efficiency equivalent with ordinary clear water centrifugal pump, so the overall efficiency of the sewage pump that makes improves greatly.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixed blade, comprising: the cutting device comprises a groove body/a fixed blade sleeve, an outer ring and a fixed blade slice, wherein the fixed blade slice is fixedly connected between the groove body and the outer ring, or the fixed blade slice is fixedly connected between the fixed blade sleeve and the outer ring.

2. A fixed blade, comprising: a first fixed edge and a second fixed edge,

3. The fixed blade of claim 2 wherein the number of second fixed blade sections is greater than the number of first fixed blade sections.

4. The fixed blade of claim 3, wherein the number of first fixed blade sections is 3 and the number of second fixed blade sections is 6.

5. The fixed blade of claim 2, wherein the first fixed blade slices are uniformly distributed radially along the outer wall of the tank body; the second fixed blade slices are uniformly distributed along the outer wall of the second fixed blade sleeve.

6. The fixed blade of claim 5, wherein the first fixed blade is annularly distributed along the outer wall of the groove body in a zigzag manner; the second fixed blade slices are distributed along the outer wall of the second fixed blade sleeve in an annular zigzag manner.