阅读说明：本技术 一种破碎泵用切割刀组 (Cutting knife tackle for crushing pump ) 是由 肖爱华 于 2019-12-10 设计创作，主要内容包括：本发明涉及一种破碎泵用切割刀组,包括套接固定在泵轴上叶轮前端的切割轮、和间隙配合套接在切割轮外并嵌装在泵体内或泵盖内或吸入管内的切割套,切割轮包括轮圈和叶片,多个叶片均布连接在轮圈外周,叶片包括筋部和叶部,筋部为由轮圈直线或弧形朝外延伸的筋条结构,叶部一侧边连接在筋部上部侧边,叶部绕圆周方向由一侧边朝向另一侧边平面高度降低延伸,叶部的另一侧边为刃口；所述切割套的内孔壁上均布多个不平行于切割套轴线的斜槽。该刀组能有效提高切割轮与切割套切割效率,防缠绕抱死,提高使用寿命。(The invention relates to a cutting knife group for a crushing pump, which comprises a cutting wheel sleeved and fixed at the front end of an impeller on a pump shaft and a cutting sleeve sleeved outside the cutting wheel in a clearance fit manner and embedded in a pump body or a pump cover or a suction pipe, wherein the cutting wheel comprises a wheel rim and blades, a plurality of blades are uniformly distributed and connected on the periphery of the wheel rim, each blade comprises a rib part and a blade part, each rib part is of a rib structure which extends outwards from the straight line or the arc of the wheel rim, one side edge of each blade part is connected to the side edge of the upper part of the rib part, the height of each blade part is reduced and extended from one side edge to the plane of the other side edge in; a plurality of chutes which are not parallel to the axis of the cutting sleeve are uniformly distributed on the inner hole wall of the cutting sleeve. This knife tackle can effectively improve cutting wheel and cutting cover cutting efficiency, and antiwind locking improves life.)

1. The utility model provides a cutting knife tackle for crushing pump which characterized in that: the cutting wheel comprises a wheel rim and blades, wherein the blades are uniformly distributed and connected on the periphery of the wheel rim, the blades comprise a rib part and a blade part, the rib part is of a rib structure which extends outwards from the straight line or the arc of the wheel rim, one side edge of the blade part is connected to the side edge of the upper part of the rib part, the height of the blade part is reduced and extends from one side edge to the other side edge in the circumferential direction, and the other side edge of the blade part is a cutting edge; a plurality of chutes which are not parallel to the axis of the cutting sleeve are uniformly distributed on the inner hole wall of the cutting sleeve.

2. The cutter set for a breaker pump of claim 1, wherein: and a Stellite alloy layer is welded on the cutting edge, and a Stellite alloy layer is welded on the circumferential side edge of the blade part.

3. The cutter set for a breaker pump of claim 1, wherein: the circumferential side edge of the blade part is a cutting edge, and a Stellite alloy layer is welded on the cutting edge.

4. The cutter set for a breaker pump of claim 1, wherein: the side of the chute on the chute back to the impeller faces the flaring of the outer arc of the chute.

5. The cutter group for a breaker pump according to claim 1 or 4, wherein: and a Stellite alloy layer is welded on the inner hole wall of the cutting sleeve in a surfacing mode.

Technical Field

The invention belongs to the technical field of industrial water pumps, and mainly relates to a cutting knife set for a crushing pump.

Background

PTA is one of the important bulk organic raw materials, and is widely used in various aspects of national economy such as chemical fiber, light industry, electronics, buildings and the like. The use of PTA is more concentrated, more than 90% of PTA is used for producing polyethylene terephthalate in the world, and the rest is used as raw materials of polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT) and other products. The world first of China's polyester production is a genuine polyester big country. The demand of a crushing pump for conveying and cutting pulp in the polyester industry is getting larger and larger, and the pump is required to be stable in operation, low in failure rate and simple and quick to maintain.

Because the conveying medium contains acetic acid and polyester, the phenomena of winding and blockage of small particles and fibers in the crushing pump and the pipeline are easily caused. The existing crushing pump structure is characterized in that the excircle of a cutting wheel is matched with a sheath for use, cut media enter a pump impeller through a grid plate, the cutting efficiency is low, the cutting wheel, the sheath and the grid plate are subjected to aggravation abrasion or locking due to aggregation and scaling of particle fibers in the media running for a long time in the running process of a water pump, vibration or shaft power increase or even parking occurs, the operation efficiency and the service life are influenced, and the cutting wheel, the sheath and the grid plate are also the most failed parts in the running process.

In the existing sheath design, a plurality of groups of spacers are added in an annular space, cutting is carried out by utilizing the relative displacement of a cutting wheel and the spacers, the phenomenon that the spacers follow the cutting wheel along with cutting objects in the sheath often occurs, the cutting efficiency is low, and the spacers are easy to damage; and the cutting wheel and the sheath spacer are easy to wind and lock everywhere, which is the position with most faults in the operation process.

Disclosure of Invention

The invention aims to provide a cutting knife set for a crushing pump, which can effectively improve the cutting efficiency of a cutting wheel and a cutting sleeve, prevent winding and locking and prolong the service life.

The technical scheme of the invention is as follows: the utility model provides a cutting knife tackle for crushing pump which characterized in that: the cutting wheel comprises a wheel rim and blades, wherein the blades are uniformly distributed and connected on the periphery of the wheel rim, the blades comprise a rib part and a blade part, the rib part is of a rib structure which extends outwards from the straight line or the arc of the wheel rim, one side edge of the blade part is connected to the side edge of the upper part of the rib part, the height of the blade part is reduced and extends from one side edge to the other side edge in the circumferential direction, and the other side edge of the blade part is a cutting edge; a plurality of chutes which are not parallel to the axis of the cutting sleeve are uniformly distributed on the inner hole wall of the cutting sleeve.

And a Stellite alloy layer is welded on the cutting edge, and a Stellite alloy layer is welded on the circumferential side edge of the blade part.

The circumference side edge of the blade part is a cutting edge, a Stellite alloy layer is welded on the cutting edge, and the cutting efficiency and the effect of conveying the cutting objects between the circumference side edge and the cutting sleeve can be further improved.

The side of the chute on the chute back to the impeller faces the flaring of the outer arc of the chute.

And a Stellite alloy layer is welded on the inner hole wall of the cutting sleeve in a surfacing mode.

The invention has the advantages that: the chute is directly arranged on the inner sleeve hole of the cutting sleeve, the easy-to-wear surfacing stellite alloy for the inner sleeve hole avoids the damage of a traditional used spacer and the influence of follow-up on cutting efficiency, the chute is arranged and the straw plaited outward flaring is arranged on the chute, cutting objects can be effectively guided towards the direction of the impeller from front to back, the winding probability of the cutting objects is reduced, the facing-out and outer circumferential edge easy-to-wear surface surfacing stellite alloy for the cutting wheel improves the use wear resistance, thereby greatly reducing the occurrence of the fault of the crushing pump and reducing the field maintenance cost of a user.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of a cutting wheel according to the present invention;

FIG. 3 is a schematic view of the cutting sheath of the present invention.

In the figure: the device comprises a suction pipe 1, an impeller 2, a pump body 3, a pump shaft 4, a cutting wheel 5, a rim 6, blades 7, a rib part 8, a blade part 9, an outer cutting edge 10, a circumferential cutting edge 11, Stellite alloy layers 12 and 121, a cutting sleeve 13 and a chute 14.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1-3, a cutter set for a crushing pump comprises a cutting wheel 5 sleeved and fixed at the front end of an impeller 2 on a pump shaft 4, the cutting wheel 5 comprises a rim 6 and blades 7, the rim 6 is connected with the pump shaft 4 in a key connection and fixed locking mode, the blades 7 are uniformly connected to the periphery of the rim 6, the blades 7 comprise a rib part 8 and a blade part 9, the rib part 8 is of a rib structure extending outwards from the straight line or the arc shape of the rim, one side edge of the blade part 9 is connected to the side edge of the upper part of the rib part 8, the height of the blade part 9 is reduced and extends from one side edge to the plane of the other side edge along the circumferential direction (one side edge is one side of the suction pipe 1, the other side is one side of the impeller 2), the other side edge of the blade part is an outer side cutting edge 10, the circumferential side edge of the blade part is a circumferential cutting edge 11, and Stellite alloy layers 12 are welded on the; a plurality of inclined grooves 14 which are not parallel to the axis of the cutting sleeve are uniformly distributed on the inner hole wall of the cutting sleeve 13, the groove edge on each inclined groove is back to one side of the impeller and faces towards the outer circular arc flaring of the groove, and the inclined grooves are staggered on the inner hole wall of the cutting sleeve to form a Stellite alloy layer 121.