CN215409223U

CN215409223U - Centrifugal pump

Info

Publication number: CN215409223U
Application number: CN202121505994.4U
Authority: CN
Inventors: 赵永亮
Original assignee: Hebei Hanchang Mine Machinery Co ltd
Current assignee: Hebei Hanchang Mine Machinery Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-01-04
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a centrifugal pump, wherein a transmission shaft is movably arranged on the surface of a pump body, a deep groove corresponding to the transmission shaft is formed in the pump body, and the surface of the transmission shaft is attached to the inner wall of the pump body; the method comprises the following steps: the positioning grooves are formed in the surface of the pump body and are symmetrically distributed relative to the center of the pump body; the positioning block is fixedly arranged on the surface of the transmission shaft. This centrifugal pump is when the installation transmission shaft, with the epaxial locating piece alignment constant head tank of transmission, insert the deep trouth with the lower extreme of transmission shaft again, the inclined plane of fixture block is extruded by the inner wall of the pump body this moment, the fixture block moves toward the inside of recess, continue to insert the transmission shaft, when fixture block and draw-in groove are in same vertical direction, the fixture block enters into the draw-in groove under miniature spring's effect, both installed the transmission shaft on the pump body this moment, it is not only quick convenient to install, has also improved the commonality of spare part.

Description

Centrifugal pump

Technical Field

The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump.

Background

The centrifugal pump can convey liquid through centrifugal force generated when the paddle rotates, the centrifugal pump is widely used in industries such as electric power, coal, building materials and the like, for example, a low-temperature-resistant marine centrifugal pump with the publication number of CN110778505A, the centrifugal pump can be subjected to low-temperature-resistant work through an electric heater, a heat conduction pipe and a constant-temperature plate through a centrifugal pump body, and the centrifugal pump can be subjected to damping protection through a damping unit;

but the general degree of parts is poor in its product, and the cost is higher, has not only increased the degree of difficulty that the staff changed when changing, has also brought certain economic pressure for the user, is unfavorable for long-term use to and the apron does not present natural angle, and the spiral case runner is comparatively narrow, has reduced the availability factor and the life of device.

In order to solve the above problems, innovative design based on the original centrifugal pump is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a centrifugal pump to solve the problems that the general degree of components in the product is poor, the cost is high, a cover plate does not have a natural angle, a volute flow passage is narrow, the service efficiency of the device is reduced, and the service life of the device is prolonged.

In order to achieve the purpose, the utility model provides the following technical scheme: a transmission shaft is movably mounted on the surface of a pump body, a deep groove corresponding to the transmission shaft is formed in the pump body, and the surface of the transmission shaft is attached to the inner wall of the pump body;

a centrifugal pump, comprising:

the positioning grooves are formed in the surface of the pump body and are symmetrically distributed relative to the center of the pump body;

the positioning block is fixedly arranged on the surface of the transmission shaft;

the draw-in groove, the draw-in groove is seted up the inside of the pump body, and the surface of the pump body has seted up the slot hole, and the long round pin is at the slot hole internalization, makes things convenient for the staff to dismantle the transmission shaft fast.

Preferably, the inside of the pump body is provided with a sliding groove, the positioning block corresponds to the positioning groove in a one-to-one manner, and the positioning block and the positioning groove facilitate alignment work when workers insert the pump body.

Preferably, the inside fixed mounting of transmission shaft has the miniature spring who plays the elasticity effect of resetting, and one side fixed mounting in addition of miniature spring have with the fixture block that the draw-in groove corresponds to the side of fixture block is slope column structure, the side of fixture block slope form, makes things convenient for the staff to insert the transmission shaft deep trouth, and the inclined plane of fixture block is extruded by the inner wall of the pump body when inserting, and miniature spring is compressed by the card piece this moment.

Preferably, the confession is seted up to the inside of transmission shaft the recess that the fixture block removed, and the lower extreme of fixture block with the inner wall laminating of transmission shaft, and the fixture block about the center of transmission shaft is to distributing, when the inclined plane of fixture block was extruded by the inner wall of the pump body, the fixture block moved toward the inside of recess, because the lower extreme of fixture block and the inner wall laminating of transmission shaft, so the fixture block only moved in vertical direction, and a plurality of fixture blocks have improved the stability of device.

Preferably, the inside movable mounting of the pump body has long round pin, and long round pin run through in the inside of the pump body to the surface of long round pin with the inner wall laminating of the pump body to and long round pin and fixture block one-to-one, when dismantling the transmission shaft, press the dismantlement, the long round pin is with the ejecting draw-in groove of fixture block this moment, can accomplish the dismantlement work.

Preferably, the side surface of the long pin is fixedly provided with a sliding block corresponding to the sliding groove, the sliding blocks are symmetrically distributed about the center of the long pin, the lower surface of the long pin is attached to the upper surface of the clamping block, when the long pin is pressed, the sliding block slides in the sliding groove, the sliding block does not enable the long pin to move out of the pump body, and the symmetrically distributed sliding blocks increase the stability of the device.

Preferably, the side face of the pump body is fixedly provided with a cover plate with a flow line at a natural inclination angle, and the inside of the pump body is fixedly provided with a wider volute flow channel.

Compared with the prior art, the utility model has the beneficial effects that: the centrifugal pump;

1. when the centrifugal pump is used for installing the transmission shaft, the positioning block on the transmission shaft is aligned to the positioning groove, the lower end of the transmission shaft is inserted into the deep groove, the inclined surface of the clamping block is extruded by the inner wall of the pump body at the moment, the clamping block moves towards the inside of the groove and is continuously inserted into the transmission shaft, when the clamping block and the clamping groove are positioned in the same vertical direction, the clamping block enters the clamping groove under the action of the micro spring, and at the moment, the transmission shaft is installed on the pump body, so that the installation is fast and convenient, and the universality of parts is improved;

2. after the centrifugal pump is impacted, worn by cutting or even corroded and worn, a new transmission shaft needs to be replaced, the long pin is pressed at the moment, the long pin moves towards the inside of the pump body through the sliding block and the sliding groove, meanwhile, the long pin pushes the corresponding clamping block out of the clamping groove, the transmission shaft is not clamped with the pump body at the moment, a worker can take out the transmission shaft, the operation in the disassembling process is simple, and the service life of the device is prolonged;

3. this centrifugal pump side fixed mounting has the streamline to be natural inclination's apron, can make hydraulic efficiency more excellent, and cavitation performance is more outstanding, and the back shroud streamline design of slope reduces two-phase fluid and strikes the apron, improves the life-span, and wider spiral case runner reduces fluidic speed of tying together. Reduce loss and prolong service life.

Drawings

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

FIG. 2 is a partial left side view of the pump body of the present invention;

FIG. 3 is a schematic view of the structure A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic side sectional view of the long pin of the present invention in a partially working state;

FIG. 5 is an enlarged view of the structure at B in FIG. 3 according to the present invention.

In the figure: 1. a pump body; 2. a drive shaft; 3. deep grooves; 4. positioning a groove; 5. a card slot; 6. a long hole; 7. a chute; 8. a groove; 9. positioning blocks; 10. a micro-spring; 11. a clamping block; 12. a long pin; 13. a slider; 101. a cover plate; 102. a volute flow passage.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a transmission shaft 2 is movably mounted on the surface of a pump body 1, a deep groove 3 corresponding to the transmission shaft 2 is formed in the pump body 1, and the surface of the transmission shaft 2 is attached to the inner wall of the pump body 1;

a centrifugal pump, comprising:

the positioning grooves 4 are formed in the surface of the pump body 1, and the positioning grooves 4 are symmetrically distributed about the center of the pump body 1;

the positioning block 9 is fixedly arranged on the surface of the transmission shaft 2;

the clamping groove 5 is formed in the pump body 1, and the long hole 6 is formed in the surface of the pump body 1.

The inside of the pump body 1 is provided with a sliding groove 7, and the positioning blocks 9 correspond to the positioning grooves 4 one by one.

The inside fixed mounting of transmission shaft 2 has the miniature spring 10 that plays the elasticity effect of restoring to the throne, and the other side fixed mounting of miniature spring 10 has the fixture block 11 that corresponds with draw-in groove 5 to the side of fixture block 11 is the slope column structure.

The inside of transmission shaft 2 is seted up and is supplied the recess 8 that fixture block 11 removed, and the lower extreme of fixture block 11 and the inner wall laminating of transmission shaft 2 to the center of fixture block 11 about transmission shaft 2 is to distributing.

When installation transmission shaft 2, aim at constant head tank 4 on the pump body 1 with the locating piece 9 on the transmission shaft 2, insert the deep trouth 3 with the lower extreme of transmission shaft 2 again, the inclined plane of fixture block 11 is extruded by the inner wall of the pump body 1 this moment, fixture block 11 is toward the inside of recess 8 and is removed, miniature spring 10 can be extruded to fixture block 11 simultaneously, continue to insert transmission shaft 2 this moment, when fixture block 11 and draw-in groove 5 are in same vertical direction, fixture block 11 is under miniature spring 10's effect, enter into draw-in groove 5, both install transmission shaft 2 on the pump body 1 this moment.

The long pin 12 is movably mounted inside the pump body 1, the long pin 12 penetrates through the pump body 1, the surface of the long pin 12 is attached to the inner wall of the pump body 1, and the long pin 12 corresponds to the fixture blocks 11 one by one.

The side surface of the long pin 12 is fixedly provided with a slide block 13 corresponding to the sliding chute 7, the slide blocks 13 are symmetrically distributed around the center of the long pin 12, and the lower surface of the long pin 12 is attached to the upper surface of the fixture block 11.

After being impacted wear, cutting wear or even corrosive wear, when transmission shaft 2 that needs to be renewed, staff can press long round pin 12 this moment, and long round pin 12 passes through slot hole 6 and removes in the inside of the pump body 1, and slider 13 slides in the inside of spout 7 simultaneously, and long round pin 12 is the ejecting draw-in groove 5 of the fixture block 11 that corresponds simultaneously, and transmission shaft 2 is not in the block state with the pump body 1 this moment, and the staff can take out transmission shaft 2.

A cover plate 101 with a flow line at a natural inclination angle is fixedly installed on the side surface of the pump body 1, and a wider volute flow channel 102 is fixedly installed inside the pump body 1.

The cover plate 101 of the pump body 1 internally mounted has the mushroom head design with a larger fillet, the cover plate 101 is of a natural inclination angle, the hydraulic efficiency is better, the cavitation performance is more excellent, the streamline design of the cover plate 101 on the inclined rear side reduces the impact of two-phase fluid on the cover plate 101, the service life is prolonged, the volute flow channel 102 which is wider reduces the linking speed of the fluid, reduces the loss and prolongs the service life.

The working principle is as follows: when the centrifugal pump is used, according to the figures 1-5, when the transmission shaft 2 is installed, the lower end of the transmission shaft 2 is inserted into the deep groove 3, at the moment, the inclined surface of the fixture block 11 is extruded by the inner wall of the pump body 1, the fixture block 11 moves towards the inside of the groove 8, at the moment, the transmission shaft 2 is continuously inserted, when the fixture block 11 and the clamping groove 5 are in the same vertical direction, the fixture block 11 enters the clamping groove 5 under the action of the micro spring 10, and at the moment, the transmission shaft 2 is installed on the pump body 1; after the transmission shaft 2 is subjected to impact wear, cutting wear and even corrosive wear and needs to be replaced with a new transmission shaft 2, at the moment, a worker can press the long pin 12, the long pin 12 pushes the corresponding fixture block 11 out of the fixture groove 5, at the moment, the transmission shaft 2 is not in a clamping state with the pump body 1, and the worker can take out the transmission shaft 2; the cover plate 101 arranged in the pump body 1 is designed to have a mushroom head with a larger fillet, the cover plate 101 is at a natural inclination angle, the hydraulic efficiency is better, the cavitation performance is more excellent, the streamline design of the cover plate 101 at the inclined rear side reduces the impact of two-phase fluid on the cover plate 101, the service life is prolonged, the flow involving speed of the fluid is reduced, the loss is reduced, and the service life is prolonged by the wider volute flow channel 102.

The above is the operation of the whole device, and the details which are not described in detail in this specification are well known to those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A transmission shaft is movably mounted on the surface of a pump body, a deep groove corresponding to the transmission shaft is formed in the pump body, and the surface of the transmission shaft is attached to the inner wall of the pump body;

it is characterized by comprising:

the draw-in groove is seted up the inside of the pump body, and the surface of the pump body has seted up the slot hole.

2. A centrifugal pump according to claim 1, characterized in that: the pump body is internally provided with a sliding groove, and the positioning blocks correspond to the positioning grooves one to one.

3. A centrifugal pump according to claim 1, characterized in that: the inside fixed mounting of transmission shaft has the miniature spring that plays the elasticity effect of resetting, and one side fixed mounting of miniature spring with the fixture block that the draw-in groove corresponds to the side of fixture block is the slope column structure.

4. A centrifugal pump according to claim 3, characterized in that: the fixture block is arranged on the inner side of the transmission shaft, a groove for the fixture block to move is formed in the transmission shaft, the lower end of the fixture block is attached to the inner wall of the transmission shaft, and the fixture block is distributed in the center of the transmission shaft.

5. A centrifugal pump according to claim 1, characterized in that: the inner movable mounting of the pump body has a long pin, and the long pin runs through the inner of the pump body, and the surface of the long pin with the inner wall laminating of the pump body to and long pin and fixture block one-to-one.

6. A centrifugal pump according to claim 5, characterized in that: and the side surface of the long pin is fixedly provided with a sliding block corresponding to the sliding groove, the sliding blocks are symmetrically distributed about the center of the long pin, and the lower surface of the long pin is attached to the upper surface of the clamping block.

7. A centrifugal pump according to claim 1, characterized in that: the side fixed mounting of the pump body has the streamline and is natural inclination's apron, and the inside fixed mounting of the pump body has wider spiral case runner.