CN206111573U - Take pump sending cutting device's centrifugal slurry pump - Google Patents

Abstract

The utility model provides a centrifugal slurry pump with a pumping cutting device, which comprises a transmission shaft and a centrifugal pump impeller installed on the transmission shaft. The suction port of the centrifugal slurry pump is provided with a front pump cover, and the front pump cover There is a water inlet on the top, and a water absorption chamber is provided at the outer end of the front pump cover; the transmission shaft passes through the impeller of the centrifugal pump and the water inlet and extends into the water absorption chamber, and a rotating blade is installed on the end of the transmission shaft located in the water absorption chamber, and the water absorption chamber wall The position corresponding to the rotating blade is equipped with a static cutter head, and the rotating blade and the static cutter head cooperate with each other to form a cutting effect; the utility model effectively solves the problem of centrifugal slag in a working environment with too large impurities or extremely uneven flexible impurities. The blockage of the flow channel of the slurry pump can ensure the trouble-free and normal operation of the centrifugal slurry pump.

Description

Centrifugal slurry pump with pump cutting device

technical field

The utility model relates to the field of fluid mechanical equipment, in particular to a centrifugal slurry pump with a pumping cutting device.

Background technique

The name of the slurry pump is a kind of centrifugal pump divided from the perspective of conveying medium. Slurry pumps are mainly used in mines, power plants, dredging, metallurgy, chemicals, building materials, petroleum and other industries. The slurry pump works under the liquid, and it is mostly used to pump and transport the mixture of solid particles containing dregs and water. Slurry pumps usually have good non-clogging performance, compact structure, small footprint, and can be directly installed in the pool. However, when the volume of impurities is too large or there are many flexible impurities, the slurry pump is also prone to blockage. When the slurry When the flow path of the pump impeller is blocked, a series of phenomena such as eccentricity and vibration will occur in the impeller, which seriously affects the normal operation of the equipment.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned shortcomings, and provide a centrifugal slurry pump with a pumping and cutting device. By improving the structure of the centrifugal slurry pump, it can effectively solve the problem of excessively large impurities or extremely inflexible impurities. The problem of blockage of the centrifugal slurry pump flow channel under a uniform working environment ensures the trouble-free and normal operation of the centrifugal slurry pump.

In order to solve the above technical problems, the utility model adopts the following technical solution: a centrifugal slurry pump with a pumping cutting device, including a transmission shaft and a centrifugal pump impeller installed on the transmission shaft, the centrifugal slurry pump The position of the water suction port of the pump is provided with a front pump cover, the front pump cover is provided with a water inlet, and the outer end of the front pump cover is provided with a water suction chamber;

The transmission shaft passes through the impeller of the centrifugal pump and the water inlet and extends into the water absorption chamber. A rotating blade is installed on the end of the transmission shaft located in the water absorption chamber, and a static blade is installed on the wall of the water absorption chamber corresponding to the rotating blade. The cutter head, the rotating blade and the static cutter head cooperate with each other to form a cutting effect.

Further, the water absorption chamber is sequentially composed of a plane part, a curved part and a cylindrical part; the plane part and the front pump cover are parallel to each other, and the plane part is fixedly installed on the pump casing and fixed to the front pump cover, The caliber of the plane part is the same as that of the water inlet of the front pump cover; the caliber of the curved part gradually decreases along the direction close to the plane part, and the inner wall of the cylindrical part is provided with a static cutter head.

Further, a shaft sleeve is fixedly installed on the transmission shaft, and one end of the shaft sleeve is in contact with the end surface of the centrifugal pump impeller, and the other end is fixedly installed with a rotating blade, and the shaft sleeve axially connects the centrifugal pump impeller and the rotating blade. located on the drive shaft.

Further, the rotary blade includes two axial-flow blades at an angle of 180° to each other, and the static cutter head is composed of a plurality of bosses uniformly distributed in a circular array.

Furthermore, the distance from the outer end of the axial-flow blade to the axis of the transmission shaft is 0.7-0.8 times the maximum diameter of the water absorption chamber, and there is a gap of 3-8mm between the boss and the outer end of the axial-flow blade.

Furthermore, the axial-flow blade is installed on the transmission shaft through the cutter head.

Beneficial effects of the utility model: the utility model improves the structure of the centrifugal slurry pump, changes the inlet structure of the pump and installs a pumping cutting device before the pump inlet, and effectively removes impurities and flexible substances with large volume. By cutting, the problem of clogging of the flow channel of the centrifugal slurry pump is improved, and the normal operation of the centrifugal slurry pump is guaranteed.

Description of drawings

Figure 1 is a schematic structural view of a centrifugal slurry pump with a pumping cutting device;

Fig. 2 is a schematic diagram of the composition structure of the rotary blade and the static cutter head in Fig. 1;

Fig. 3 is a schematic diagram of another composition structure of the rotary blade and the static cutter head in Fig. 1;

In the figure, transmission shaft 1, centrifugal pump impeller 2, front pump cover 3, water inlet 4, water absorption chamber 5, plane part 5.1, curved surface part 5.2 and cylindrical surface part 5.3, rotary blade 6, axial flow blade 6.1, static knife Head 7, boss 7.1, pump casing 8, shaft sleeve 9.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figure 1, a centrifugal slurry pump with a pumping cutting device includes a transmission shaft 1 and a centrifugal pump impeller 2 installed on the transmission shaft 1, and the suction port of the centrifugal slurry pump is provided with The front pump cover 3 is provided with a water inlet 4 on the front pump cover 3, and the outer end of the front pump cover 3 is provided with a water absorption chamber 5; in this embodiment, the width of the outlet of the centrifugal pump impeller 2 blades is that of an ordinary centrifugal pump (design parameters Centrifugal pumps with the same "flow Q and head H") 1.5 times the width of the outlet of the impeller blades.

The transmission shaft 1 passes through the impeller 2 of the centrifugal pump and the water inlet 4 and extends into the water absorption chamber 5. A rotating blade 6 is installed on the transmission shaft 1 at one end of the water absorption chamber 5. The inner wall of the water absorption chamber 5 is connected with The position corresponding to the rotary blade 6 is equipped with a static cutter head 7, and the rotary blade 6 and the static cutter head 7 cooperate with each other to form a cutting effect. The way in which the rotating blade 6 and the static cutter head 7 cooperate with each other can obviously enhance the cutting effect.

The water absorption chamber 5 is sequentially composed of a plane part 5.1, a curved part 5.2 and a cylindrical part 5.3; the plane part 5.1 is parallel to the front pump cover 3, and the plane part 5.1 is fixedly installed on the pump casing 8, and is aligned with the front The pump cover 3 is fixed, and the diameter of the flat part 5.1 is the same as that of the water inlet 4 of the front pump cover 3; the diameter of the curved part 5.2 gradually decreases along the direction close to the flat part 5.1, and the cylindrical part 5.3 The inner wall is provided with static cutter head 7. In this embodiment, the plane part 5.1 can be fixedly installed on the pump casing 8 by bolts, which can realize convenient installation, disassembly and maintenance, and at the same time, the front pump cover 3 can also be directly clamped on the pump casing 8 in this way, which is This design and installation method is simple and reliable.

A shaft sleeve 9 is also fixedly installed on the transmission shaft 1, one end of the shaft sleeve 9 is in contact with the end face of the centrifugal pump impeller 2, and the other end is fixedly installed with a rotary blade 6, and the shaft sleeve 9 connects the centrifugal pump impeller 2 and the The rotary blade 6 is positioned axially on the transmission shaft 1 . In this embodiment, the rotary blade 6 and the shaft sleeve 9 can be fixedly installed at the end of the transmission shaft 1 by bolts. This installation method is simple, reliable, and detachable, which is convenient for disassembly and maintenance.

As shown in FIG. 2 , the rotary blade 6 includes two axial-flow blades 6.1 at an angle of 180° to each other, and the static cutter head 7 is composed of a plurality of bosses 7.1 uniformly distributed in a circular array. Adopting the axial-flow blade 6.1 can reduce the influence on the water inlet effect of the water-absorbing chamber 5, and meanwhile, it has a sharp blade, and the cutting effect is good.

The distance from the outer end of the axial-flow blade 6.1 to the center of the transmission shaft 1 is 0.7-0.8 times the maximum diameter of the water absorption chamber 5, and there is a gap of 3-8mm between the boss 7.1 and the outer end of the axial-flow blade 6.1 . This size design will not affect the inflow of water into the water absorption chamber 5, but also can ensure a good cutting effect.

In addition, as shown in FIG. 3 , the axial-flow blade 6.1 of this embodiment can also be installed on the drive shaft 1 through the cutter head 6.2.

In this embodiment, by improving the structure of the centrifugal slurry pump, changing the inlet structure of the pump and installing a pumping cutting device in front of the pump inlet, it can effectively cut the larger impurities and flexible substances, and improve the centrifugal slurry pump. The blockage of the flow channel of the slurry pump ensures the normal operation of the centrifugal slurry pump. At the same time, the installation method of the rotary blade 6 and the water absorption chamber 5 is simple, reliable, and detachable, and the disassembly and maintenance are very convenient.

Claims (6)

1. a kind of centrifugal type slurry pump with pumping cutter sweep, including power transmission shaft（1）Be installed on power transmission shaft（1）On centrifugation Impeller of pump（2）, the water sucking mouth position of the centrifugal type slurry pump is provided with front pump cover（3）, the front pump cover（3）It is provided with water inlet （4）, the front pump cover（3）Outer end is provided with suction chamber（5）, it is characterised in that：

The power transmission shaft（1）Through centrifugal pump impeller（2）And water inlet（4）And it extend into suction chamber（5）It is interior, the power transmission shaft （1）It is upper to be located at suction chamber（5）One end rotating blade is installed（6）, the suction chamber（5）With rotating blade on inwall（6）Phase Corresponding position is provided with quiet cutter head（7）, the rotating blade（6）With quiet cutter head（7）Work in coordination to form cutting effect.

2. it is according to claim 1 with pumping cutter sweep centrifugal type slurry pump, it is characterised in that：The suction chamber （5）Successively by planar section（5.1）, curvature portion（5.2）And cylindrical surface portion（5.3）Composition；The planar section（5.1）With Front pump cover（3）It is parallel to each other, the planar section（5.1）It is fixedly installed in pump case（8）On, and to front pump cover（3）Formed and fixed, The planar section（5.1）Bore and front pump cover（3）Water inlet（4）Bore is identical；The curvature portion（5.2）Bore Along near planar section（5.1）Direction be gradually reduced, the cylindrical surface portion（5.3）Inwall be provided with quiet cutter head（7）.

3. it is according to claim 1 with pumping cutter sweep centrifugal type slurry pump, it is characterised in that：The power transmission shaft （1）On be also installed with axle sleeve（9）, the axle sleeve（9）One end end and centrifugal pump impeller（2）End contact, the other end Fixed installation rotating blade（6）, the axle sleeve（9）By centrifugal pump impeller（2）And rotating blade（6）It is axially positioned on power transmission shaft （1）On.

4. it is according to claim 1 with pumping cutter sweep centrifugal type slurry pump, it is characterised in that：The rotating blade （6）Including two mutually in the axial-flow type blade at 180 ° of angles（6.1）, the quiet cutter head（7）It is uniform by multiple circular arrays Boss（7.1）Composition.

5. it is according to claim 4 with pumping cutter sweep centrifugal type slurry pump, it is characterised in that：The axial-flow type knife Piece（6.1）Outer end is to power transmission shaft（1）The distance in axle center is suction chamber（5）0.7-0.8 times of maximum caliber, the boss （7.1）With axial-flow type blade（6.1）There is the gap of 3-8mm in outer end.

6. it is according to claim 4 with pumping cutter sweep centrifugal type slurry pump, it is characterised in that：The axial-flow type knife Piece（6.1）By cutterhead（6.2）Installed in power transmission shaft（1）On.