CN210565333U - Shell split half-mouth ring device of split pump - Google Patents

Abstract

The utility model discloses a casing of well turn-on pump divides half choma device, its casing choma comprises two half choma rings (2) of branch a outside between two half choma rings is equipped with holding ring (1), its another outside is equipped with down holding ring (3), half choma ring of branch and last holding ring, all be arc column structure (5) cooperation installation down between the holding ring. And a gasket is arranged on the half-divided end surface between the upper positioning ring and the lower positioning ring. The utility model discloses constitute outer positioning portion with last holding ring and lower holding ring, constitute interior seal part with two half shell oral rings. The pressure difference between the front and the back of the shell opening ring fluid is utilized to generate the compression seal on the surface of the halved shell opening ring half, and the compression seal is generated on the upper positioning ring, the lower positioning ring and the shell of the split pump. The shell, the shell split half-ring device and the rotor component can be directly assembled without disassembling and assembling the rotor component, so that the mounting is convenient, and the working efficiency is improved.

Description

Shell split half-mouth ring device of split pump

Technical Field

The utility model relates to an open multistage centrifugal pump in the level especially relates to a casing choma device of well open pump.

Background

The middle-open type multistage centrifugal pump is generally an axial split type multistage centrifugal pump (horizontal middle-open type), relates to long-distance transmission pipelines, oil gathering stations, transfer stations and the like in the petroleum and petrochemical industry, and water supply occasions of steel plants and thermal power plants, is mainly used for medium-pressure and sub-high-pressure water injection or oil transportation, and belongs to important equipment in whole pipeline transportation. The rotor part is subjected to dynamic balance test, after the test is qualified, the general shell mouth ring is of an integral structure (single), and the shell mouth ring is assembled after rotating parts such as impellers, shaft sleeves and the like on the rotor part are detached one by one. Each impeller, shaft sleeve and the like of the rotor component are in interference fit with the rotating shaft, and hot assembly is needed (the inner diameter of the impeller hub is small, the outer diameter of the rotating shaft is large, and the interference fit is that after the impeller is heated by electric frequency, the inner hole of the impeller can be sleeved on the rotating shaft after being heated, and after the impeller is cooled, the inner hole is recovered, so that the impeller can be fastened on the rotating shaft and cannot move).

Disclosure of Invention

An object of the utility model is to overcome above not enough, and provide a split type, easy dismounting's well open pump's casing divides half choma device.

The purpose of the utility model is realized through the following technical scheme: the shell split half-mouth ring device of the split pump comprises a shell mouth ring, wherein the shell mouth ring is composed of two split half-shell mouth rings, an outer side between the two split half-shell mouth rings is provided with an upper positioning ring, the other outer side of the two split half-shell mouth rings is provided with a lower positioning ring, and the split half-shell mouth rings are matched and installed with the upper positioning ring and the lower positioning ring in an arc-shaped structure.

And a gasket is arranged on the half-divided end surface between the upper positioning ring and the lower positioning ring. Round holes are arranged on the split half shell opening ring, the upper positioning ring and the lower positioning ring and are positioned by matching cylindrical pins with the round holes.

Adopt the utility model discloses behind the structure, divide into outer location and interior seal two parts and constitute: forming an outer positioning part by an upper positioning ring and a lower positioning ring, wherein half end faces of the outer positioning part are provided with gaskets; the half shell split ring is assembled into the inner sealing part. The matching surfaces of the outer positioning part and the inner sealing part are provided with arc-shaped structures, and the surface of the shell opening ring is pressed and sealed by utilizing the front-back pressure difference of fluid of the shell opening ring, and the upper positioning ring, the lower positioning ring and the shell of the split pump are pressed and sealed; the split half shell mouth ring is combined left and right, the upper positioning ring and the lower positioning ring are combined up and down, and the arc-shaped structure ensures the concentricity of the shell mouth ring; the half shell mouth ring, the upper positioning ring and the lower positioning ring are provided with round holes and cylindrical pins to prevent relative rotation. The shell, the shell split half-ring device and the rotor component can be directly assembled without disassembling and assembling the rotor component, so that the mounting is convenient, and the working efficiency is improved.

Drawings

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

Fig. 1 is a schematic structural view of the housing split-half split ring device of the split pump of the present invention.

Fig. 2 is a partial left side view of fig. 1 (with the upper and lower retaining rings separated from the half shell split rings).

Detailed Description

Referring to fig. 1 and 2, the utility model discloses the casing of well-opening pump divides half choma device, including the casing choma, the casing choma comprises two half choma 2 (control split type structure, resynthesis during the use) a holding ring 1 is equipped with in the outside between two half choma (on), under another outside (under) holding ring 3 is equipped with, half choma 2 and last holding ring 1, all be arc column structure 5 (circular arc type structure) cooperation installation down between holding ring 3.

And a gasket 8 (red copper material) is arranged on the half end surface C between the upper positioning ring 1 and the lower positioning ring 3. The half shell split ring 2, the upper positioning ring 1 and the lower positioning ring 3 are provided with round holes 9, and are positioned by matching the cylindrical pin 7 with the round holes 9, so that relative rotation between the half shell split ring and the upper positioning ring, the upper positioning ring and the shell of the split pump is prevented.

The upper positioning ring 1 and the half shell split ring 2 are both provided with round holes 9 and positioned by a cylindrical pin 7 to prevent relative rotation; similarly, the lower positioning ring 3 has a circular hole 9 on its outer circumference for positioning with the cylindrical pin 7 against relative rotation with the housing of the axially split pump. The utility model discloses an equipment as follows: firstly, placing a lower positioning ring 3 on a shell of a split pump, positioning by using a cylindrical pin 7, and placing a gasket 8; then, two half shell mouth rings 2 are assembled at the impeller mouth ring of the rotor part of the split pump, then a positioning ring 1 is installed to fix the half shell mouth rings, the half shell mouth rings are positioned by a cylindrical pin 7, the half shell mouth rings are fixed at the corresponding position of the upper positioning ring 1 in a spot welding mode, and finally the half shell mouth rings are fixed at the corresponding position of the cylindrical pin 7 on the lower positioning ring 3 in a spot welding mode.

Referring to the drawings, the shell mouth ring of the present invention is divided into two halves. When the split pump runs, the pressure on the left side and the right side is different, the pressure on the right side is usually higher than that on the left side, so that the split half shell orifice ring 2 moves leftwards, and is respectively pressed with the upper positioning ring 1 and the lower positioning ring 3 rightwards at the arc-shaped structure 5 to generate acting force pointing to a central line, so that two positions of a split half end face A of the split half shell orifice ring are pressed, and leakage is prevented; meanwhile, the end faces B of the upper positioning ring 1 and the lower positioning ring 3 are pressed against the shell by the counterforce, so that leakage is prevented; a gasket 8 with the thickness of 0.05-0.1mm is arranged on the half end surface C of the upper positioning ring 1 and the lower positioning ring 3 and is positioned by an arc-shaped structure 5 (an arc-shaped structure), so that falling and leakage are prevented. The end surfaces A, B, C of the utility model have sealing effect, and no leakage occurs; utilize the upper and lower, the left and right alternately of upper locating ring 1, lower locating ring 3 and half shell oral siphon 2 to arrange, rationalize and design arc column structure, guaranteed both concentricity for the liquid flow of shell oral siphon department is steady, and part life is high.

The utility model discloses to open multistage centrifugal pump easy maintenance, improve the quality and play critical effect. On one hand, after the dynamic balance test of the rotor component is qualified, the rotor component can be integrally installed without being disassembled, the dynamic balance precision is ensured, the manpower is saved, the product quality of a manufacturing plant is improved, and the method has higher competitive advantage; on the other hand, the split type multistage centrifugal pump is convenient to overhaul, and the balance of the split type multistage centrifugal pump is a split structure except for the rotor part, so that the split type multistage centrifugal pump has a wide popularization and application prospect and a certain market space.

Claims (3)

1. The shell of the split pump is divided into a half ring device, which comprises a shell ring and is characterized in that: the shell mouth ring is formed by two half shell mouth rings (2), an upper positioning ring (1) is arranged on one outer side between the two half shell mouth rings, a lower positioning ring (3) is arranged on the other outer side of the two half shell mouth rings, and arc-shaped structures (5) are arranged between the half shell mouth rings (2) and the upper positioning ring (1) and between the half shell mouth rings (3) in a matched mode.

2. The split-half-orifice ring device of the casing of the split pump as set forth in claim 1, wherein: and a gasket (8) is arranged on the half-divided end surface between the upper positioning ring (1) and the lower positioning ring (3).

3. The housing split half-orifice ring device of the split pump as set forth in claim 1 or 2, wherein: and round holes (9) are formed in the half shell opening ring (2), the upper positioning ring (1) and the lower positioning ring (3) and are matched and positioned with the round holes (9) through cylindrical pins (7).

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