CN214945008U

CN214945008U - Pump cover mounting structure of multistage centrifugal pump

Info

Publication number: CN214945008U
Application number: CN202121206871.0U
Authority: CN
Inventors: 施勇
Original assignee: Changzhou Luorui Electric Appliance Co ltd
Current assignee: Changzhou Luorui Electric Appliance Co ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-11-30
Anticipated expiration: 2031-06-01

Abstract

The utility model discloses a multistage centrifugal pump's pump cover mounting structure, including frame, pump cover, main shaft and axial-flow type promotion stirring wheel, the front end of frame is equipped with the picture peg, and the slot has been seted up to the pump cover, and the outside spiro union of pump cover has run through fixed fastening screw with the picture peg, and axial-flow type promotion stirring wheel includes cylinder and acanthus leaf, and joint groove and location rotary slot have been seted up to the cylinder, and the spiro union of front bezel center department of pump cover has positioning screw, and the window has been seted up to the lateral part of pump cover, and window department joint has the end cap, and the end cap passes through fastening screw and is fixed with the pump cover. The utility model has the advantages of reasonable design, the pump cover is firstly clamped with the frame, and then the fastening screw rod with the axial direction vertical to the installation direction of the pump cover is utilized to fix, so that the fixing reliability of the pump cover is improved; the window with the plug is additionally arranged on the pump cover, when the axial flow type lifting stirring wheel needs to be replaced, the window is opened, the pump cover does not need to be detached, and the fixing reliability of the pump cover is guaranteed.

Description

Pump cover mounting structure of multistage centrifugal pump

Technical Field

The utility model relates to the technical field of fluid machinery, especially, relate to a multistage centrifugal pump's pump cover mounting structure.

Background

The vertical multistage centrifugal pump is a centrifugal pump with compact integral structure, small volume, light weight, low noise and obvious energy-saving effect, and is convenient to maintain, a standard vertical motor and a quick-mounting mechanical seal are adopted, the replacement is very convenient, the overflowing part of the pump is made of stainless steel materials and can be suitable for slightly corrosive media, when the motor drives the impeller on the shaft to rotate at high speed, liquid filled in the impeller is thrown to the periphery of the impeller from the center of the impeller along a flow channel between blades under the action of centrifugal force, the pressure and the speed are simultaneously increased due to the effect of the blades, and the liquid is guided to the next-level impeller through the flow channel of the guide shell, so that the principle is that the liquid flows through all the impellers and the guide shell one by one, and the pressure energy of the liquid is further increased.

The patent specification with the publication number of CN212003607U discloses a novel immersion type multistage centrifugal pump, including the intake antrum, be equipped with axial-flow type promotion stirring wheel in the intake antrum, the pump shaft, the impeller, the stator, the cover is equipped with impeller and stator on the pump shaft, axial-flow type promotion stirring wheel is installed to the pump shaft front end, the pump shaft rear end passes through coupling joint motor output shaft, the intake antrum rear portion is provided with out the water section, the intake antrum passes through the taut assembly of straining nut on a water section by the tensioning piece, it has seted up the delivery port to go out water section one side, be equipped with mechanical seal between play water section and the pump shaft, the lip type is sealed to form first sealed respectively, the second is sealed, be equipped with backward flow chamber and fabrication hole on the play water section, backward flow chamber sets up position department between mechanical seal and lip type seal, the fabrication hole is located lip type seals top position department.

The pump cover of the multi-stage centrifugal pump and the pump cover of the existing multi-stage centrifugal pump are mostly fixed with the engine base only at one side through the tensioning nut, and the axial direction of the tensioning nut is parallel to the installation direction of the pump cover, so that the fixing reliability of the pump cover is poor. Meanwhile, the pump cover needs to be disassembled to replace the axial flow type lifting stirring wheel, and the fixing reliability of the pump cover is further reduced by frequent disassembly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned problem that exists among the prior art, provide a multistage centrifugal pump's pump cover mounting structure.

In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:

a pump cover mounting structure of a multistage centrifugal pump comprises a base, a pump cover, a main shaft and an axial flow type lifting stirring wheel, a plurality of inserting plates are uniformly arranged at the front end of the base along the circumferential direction, a plurality of inserting grooves are uniformly arranged at the opening end of the pump cover along the circumferential direction, the positions of the slots and the inserting plates are in one-to-one correspondence, the outer side of the pump cover is screwed with a plurality of fastening screws which can fixedly penetrate the inserting plates inserted into the slots, the axial flow type lifting stirring wheel comprises a cylinder body and a blade plate fixed on the outer side, one end of the cylinder body is provided with a clamping groove matched with the chuck on the outer side of the main shaft, the other end of the cylinder body is provided with a positioning rotating groove, a positioning screw rod is screwed at the center of the front plate of the pump cover, a smooth head matched with the positioning rotary groove is arranged at the inner end of the positioning screw rod, the side part of the pump cover is provided with a window, and a plug is clamped at the window and fixed with the pump cover through a fastening screw.

Furthermore, in the pump cover mounting structure of the multistage centrifugal pump, the front end of the base is uniformly provided with four insertion plates along the circumferential direction, and the open end of the pump cover is uniformly provided with four insertion slots along the circumferential direction.

Furthermore, in the pump cover mounting structure of the multistage centrifugal pump, the clamping head on the outer side of the main shaft is a cross-shaped clamping head, and the clamping groove is a cross-shaped groove.

Further, in the pump cover installation structure of the multistage centrifugal pump, a thickened portion is arranged at the installation position of the fastening screw rod of the pump cover, and the thickness of the thickened portion is larger than the axial length of the rod body of the fastening screw rod.

Furthermore, in the pump cover installation structure of the multistage centrifugal pump, a convex block convenient for installing the positioning screw rod is arranged at the center of the front plate of the pump cover, and the filter screen is installed on the front plate of the pump cover around the convex block.

Further, in the pump cover installation structure of the multistage centrifugal pump, after the window of the pump cover is opened, the internal axial flow type lifting stirring wheel can be detached and taken out through the window.

The utility model has the advantages that:

the utility model has the advantages of reasonable design, on one hand the pump cover is firstly connected with the frame in a clamping way, and then the fastening screw rod with the axial direction vertical to the mounting direction of the pump cover is utilized to fix, thereby improving the fixing reliability of the pump cover; on the other hand adds the window of taking the end cap on the pump cover, when needs change axial-flow type promotion stirring wheel, as long as open the window can, need not to dismantle the pump cover, the fixed reliability of guarantee pump cover.

Of course, it is not necessary for any product to achieve all of the above advantages simultaneously in practicing the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

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

FIG. 3 is a schematic structural view of the axial flow type lifting stirring wheel of the present invention;

FIG. 4 is a schematic side view of the main shaft of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-machine base, 2-pump cover, 3-main shaft, 4-axial flow type lifting stirring wheel, 401-column, 402-blade plate, 403-clamping groove, 404-positioning rotary groove, 5-inserting plate, 6-fastening screw rod, 7-positioning screw rod, 8-window, 9-plug and 10-fastening screw rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present embodiment provides a pump cover mounting structure of a multistage centrifugal pump, including a base 1, a pump cover 2, a main shaft 3, and an axial flow type lifting and stirring wheel 4, wherein one end of the main shaft 3 is fixedly connected to an output shaft of a motor through a coupling, and an impeller and a pressing disk are further fixed to a shaft body of the main shaft located in the pump cover 2.

In this embodiment, four insertion plates 5 are uniformly arranged at the front end of the base 1 along the circumferential direction, four insertion slots are uniformly formed at the opening end of the pump cover 2 along the circumferential direction, and the insertion slots correspond to the insertion plates 5 one by one. The outer side of the pump cover 2 is screwed with a plurality of fastening screws 6 which can penetrate and fix the inserting plates 5 which are clamped into the inserting grooves. The pump cover 2 is located the fastening screw installation department and is equipped with the thickening portion, and the thickness of thickening portion is greater than the axial length of the fastening screw body of rod. The axial length of the fastening screw rod body is designed to be 0.8-1.6 cm.

In this embodiment, the axial flow type lifting stirring wheel 4 includes a column 401 and a blade plate 402 fixed on the outer side, a clamping groove 403 matched with a clamping head on the outer side of the main shaft 3 is formed in one end of the column 401, the clamping head on the outer side of the main shaft 3 is a cross-shaped clamping head, and the clamping groove 403 is a cross-shaped groove. The other end of the column 401 is provided with a positioning rotary groove 404, the center of the front plate of the pump cover 2 is screwed with a positioning screw rod 7, and the inner end of the positioning screw rod 7 is provided with a smooth head matched with the positioning rotary groove 404.

In this embodiment, the front plate center department of pump cover 2 is equipped with the lug of being convenient for install positioning screw 7, and the filter screen is installed around the lug to the front plate of pump cover 2.

In this embodiment, the window 8 is opened to the lateral part of

pump cover

2, and 8 departments of window joint have end cap 9, and end cap 9 passes through fastening screw 10 and is fixed with pump cover 2. After the window of the pump cover 2 is opened, the axial flow type lifting stirring wheel 4 inside can be detached and taken out by the window.

One specific application of this embodiment is: the structure of the embodiment is reasonable in design, the pump cover 2 is firstly clamped with the base 1 and then fixed by the fastening screw 6 which is vertical to the installation direction of the pump cover 2 in the axial direction, so that the fixing reliability of the pump cover 2 is improved; add the window 8 of taking the end cap 9 on pump cover 2, when needs change axial-flow type promotion stirring wheel 4, as long as open window 8 can, need not to dismantle pump cover 2, guarantee pump cover 2's fixed reliability. Pump cover 2 utilizes positioning screw can provide the centre gripping for pump cover 2 and support, avoids it to break away from with main shaft 3 to appear.

The preferred embodiments of the present invention disclosed above are only advantageous to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a pump cover mounting structure of multistage centrifugal pump, includes frame, pump cover, main shaft and axial-flow type promotion stirring wheel, its characterized in that: the front end of frame evenly is equipped with a plurality of picture pegs along circumference, a plurality of slots have evenly been seted up along its circumference to the open end of pump cover, the position one-to-one of slot and picture peg, the outside spiro union of pump cover has a plurality of picture pegs that can go into the card in the slot and runs through fixed fastening screw, axial-flow type promotion stirring wheel includes the cylinder and fixes the acanthus leaf in the outside, the one end of cylinder seted up with main shaft outside dop complex joint groove, the location rotary groove has been seted up to the other end, the front bezel center department spiro union of pump cover has positioning screw, positioning screw's the inner be equipped with location rotary groove complex smooth head, the window has been seted up to the lateral part of pump cover, window department joint has the end cap, the end cap passes through fastening screw and is fixed with the pump cover.

2. A pump cover attachment structure of a multistage centrifugal pump according to claim 1, characterized in that: the front end of frame evenly is equipped with four picture pegs along circumference, four slots have evenly been seted up along its circumference to the open end of pump cover.

3. A pump cover attachment structure of a multistage centrifugal pump according to claim 1, characterized in that: the chuck outside the main shaft is a cross chuck, and the clamping groove is a cross-shaped groove.

4. A pump cover attachment structure of a multistage centrifugal pump according to claim 1, characterized in that: the pump cover is located fastening screw installation department and is equipped with the thickening portion, and the thickness of thickening portion is greater than the axial length of the fastening screw body of rod.

5. A pump cover attachment structure of a multistage centrifugal pump according to claim 1, characterized in that: the pump cover is characterized in that a protruding block convenient for installing a positioning screw rod is arranged at the center of the front plate of the pump cover, and a filter screen is installed on the front plate of the pump cover around the protruding block.

6. A pump cover attachment structure of a multistage centrifugal pump according to claim 1, characterized in that: after the window of the pump cover is opened, the internal axial flow type lifting stirring wheel can be detached and taken out by the window.