CN202194835U

CN202194835U - Sand prevention deep-well pump

Info

Publication number: CN202194835U
Application number: CN2011202197105U
Authority: CN
Inventors: 李明增; 卢才美
Original assignee: WENLING ZHENSHENG MACHINERY Co Ltd
Current assignee: Zhejiang Zhensheng Electromechanical Technology Co., Ltd.
Priority date: 2011-06-18
Filing date: 2011-06-18
Publication date: 2012-04-18
Anticipated expiration: 2021-06-18

Abstract

The utility model relates to a sand prevention deep-well pump, in particular to a sand prevention stainless steel deep-well pump, which solves the problem that the existing stainless steel deep-well pump can only deliver fresh water with a sand-carrying capacity lower than one over one thousand. The sand prevention deep-well pump improves interstage seal surface position and uses a sand retaining device, a wear-resisting device and the like, solves the problem of seal surface abrasion caused by large sand-carrying capacity, allows the sand-carrying capacity to be increased for ten times or dozens of ten times, extends applied range, is reliable in performance and greatly prolongs service life.

Description

The sand control deep-well pump

Technical field

The utility model relates to deep-well pump, particularly relates to the deep-well pump of Stainless Steel Case.

Technical background

The deep-well pump of Stainless Steel Case in the market, its inter-stage sealing is made up of the stainless steel of inlaying in the middle of impeller port ring and the plastics stator cover plate, and inter-stage sealing surface position is lower than the last plane of stator cover plate; Or impeller port ring and the flat stator cover plate composition of stainless steel, the inter-stage sealing surface is equal with the stator cover plate.When both contained the water of sand grains in conveying, sand grains can stop on the cover board, or had the sand grains deposition after the termination of pumping on the cover board, and when pump moved once more, sand grains can downwards or move inward, and is easy to get into the inter-stage sealing surface.Increase wearing and tearing, increase seal clearance, increase leakage rate, aggravate the entering of sand grains simultaneously again, it is increasing to wear and tear, and the inter-stage seal clearance is also increasing, has finally influenced the working life of pump.

Summary of the invention

The main purpose of the utility model is: provide a kind of and prevent or reduce sand grains to get into the inter-stage sealing surface, reduce the abrasion of particles and the wear extent thereof of sealing surface both sides part, prevent that the inter-stage seal clearance from increasing.

Another purpose of the utility model is: the both sides part of sealing surface adopts high-abrasive material, resists its wearing and tearing.

The technological scheme of the utility model is: between the levels that the impeller port ring of pump and stator cover plate or stator seat are formed between sealing surface position or vertical level the upper end position of sealing surface be higher than the bottom surface of stator cover plate or stator seat, avoid sand grains to get into sealing surface.

In order to make the inter-stage sealing surface more wear-resisting, also can be in the one or both sides of this face the circular or heatproof of tubular of welding one deck, wear-resisting polymer and composite material thereof.

In order to improve total quality and to improve wear resistance, also can process with stainless steel or inlay stainless steel stator cover plate or stator seat at inter-stage sealing surface place.

In order to reach better sand controlling result, can also further reduce the particularly big sand grains of sand grains and get into sealing surface at above-mentioned impeller port ring arranged outside sand retaining ring.

For the sand grains that makes deposition in time with outside the current excavationg pump; Also can be deposited on the static relatively sand grains of impeller downside with stirring, sand grains also produced rotatablely move and produce centrifugal force at impeller sand retaining ring arranged outside back blades; Near the arrival impeller outlet, can be with outside the current excavationg pump.

The beneficial effect of the utility model is: make sand grains be difficult for inter-stage circulation in pump, outside the excavationg pump, seal clearance is remained in the reasonable range smoothly, improve operational reliability, improve pump performance, improve working life.

Description of drawings

Fig. 1 is a sealing surface schematic representation between the levels formed of choma and the stator cover plate of impeller;

Fig. 2 is a sealing surface schematic representation between the vertical level formed of choma and the stator cover plate of impeller;

Fig. 3 is a sealing surface schematic representation between the levels formed of choma and the stator seat of impeller;

Fig. 4 is a sealing surface schematic representation between the vertical level formed of choma and the stator seat of impeller;

Fig. 5 is the polymer schematic representation of horizontal seal face both sides welding one deck heat-resistant, wear-resistant;

Fig. 6 processes schematic representation for the stator cover plate with stainless steel;

Fig. 7 processes schematic representation for the stator seat with stainless steel;

Fig. 8 inlays the stainless steel schematic representation for the stator cover plate;

Fig. 9 inlays the stainless steel schematic representation for the stator seat;

Figure 10 is the impeller port ring arranged outside sand retaining ring and the back blades schematic representation of sealing surface between levels;

Figure 11 is the impeller port ring arranged outside sand retaining ring and the back blades schematic representation of sealing surface between vertical level.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Referring to accompanying drawing 1, the choma 3 of impeller 2 is formed horizontal seal face 6 with stator cover plate 4, and sealing face 6 is higher than the bottom surface 5 of stator cover plate 4; Pump is after quitting work, and the sand that deposits can be temporary in the upper space of bottom surface 5, can not get into sealing surface 6; Can stuck impeller yet, thus avoided sealing surface 6 excessive wears or lost efficacy in advance, prolonged the working life of pump; Stator cover plate 4 adopts interference fit, welds or be pressed on the stator seat 1 with stator seat 1, and above-mentioned each part is working of plastics.

Referring to accompanying drawing 2, the choma 12 of impeller 7 is formed vertical seal 10 with stator cover plate 9, and the upper end 8 of sealing face 10 is higher than the bottom 11 of stator cover plate 9, and the purpose of this structure and accompanying drawing 1 is identical with effect.

For the upper end 8 that makes inter-stage sealing surface 6 and sealing surface 10 keeps desirable seal clearance; Impeller 2 or 7 need remain on the original position; Its impeller boss 13 will have a supporting surface, and this supporting surface is made up of wear-resistant gasket 14 and stator seat 1, and this supporting surface also needs wear-resisting; So also can in stator seat 1, inlay or weld wear insert 15, its material such as stainless steel, pottery or polymer and composite material thereof etc.

Referring to accompanying drawing 3; The choma 19 of impeller 18 is formed horizontal seal face 20 with the inner convex platform of stator seat 16 21; Sealing face 20 is higher than the bottom surface 22 of stator seat 16; It is identical that the purpose of this structure and accompanying drawing 1 and effect are led, and impeller 18, stator 17 and stator seat 16 are formed the major part of every grade of pump, and material is plastics.

Referring to accompanying drawing 4, the choma 25 of impeller 23 is formed vertical seal face 26 with stator seat 28, and the upper end 24 of sealing face 26 is higher than the bottom surface 27 of stator seat 28, and the purpose of this structure and accompanying drawing 1 is identical with effect.

In order to make inter-stage sealing surface 26 more wear-resisting; The tube shape component of heatproof, wear-resisting polymer material can be adopted in its one or both sides; Integrally welded with impeller 23 respectively with stator seat 28 or stator cover plate 9; Its polymer can adopt polytetrafluoroethylene (PTFE)/polyether-ether-ketone (PEEK), polyimide (PI), polyphenylene sulfide (PPS) etc., and composite material such as their fillings, blend solid lubricant, fiber.

Referring to accompanying drawing 5; In order to make inter-stage sealing surface 6 more wear-resisting; Can weld the identical circular ring-shaped member 31 of a cross section and choma 30 at choma 30 places of impeller 29; Perhaps on stator cover plate 33, weld a circular ring-shaped member 32, perhaps above-mentioned both adopts welding heatproof, high-abrasive material, and its description of materials is referring to the explanation of accompanying drawing 4.

Referring to accompanying drawing 6,7, in order to improve the wear-resisting property and the total quality of inter-stage sealing, this stator cover plate 34,9 or stator seat 35,28 adopt stainless steel material.

, reduce cost in order to reduce noble metal dosage referring to accompanying drawing 8,9, can only inlay stainless steel material, as inlay 36,37, also can be used for the structure of Fig. 2, Fig. 4 at the sealing surface place.

Referring to accompanying drawing 10, in order to reach better sand controlling result, also can outside the choma 39 of impeller 38, sand retaining ring 40 be set, further reduce sand grains, particularly big sand grains gets into sealing surface, and sand retaining ring 40 can be made into one with the front shroud of impeller 38.

For the sand grains that makes deposition in time with outside the current excavationg pump, can also back blades 41 be set outside sand retaining ring 40, back blades 41 is warp-wises; Also can be to lean forward or hypsokinesis, the length of back blades 41 and sheet number be looked deposition conditions and fixed, and back blades 41 can stir the static relatively sand grains that is deposited on impeller 38 downsides; This sand grains is produced rotatablely move and produce centrifugal force; Near the arrival impeller outlet, can reduce wearing and tearing with current excavationg pump place to the inter-stage sealing surface.

The impeller that above-mentioned sand prevention ring 40 and back blades 41 are arranged is also applicable to the structure like Fig. 1, Fig. 3, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9.

Referring to accompanying drawing 11, outside the choma place 43 of impeller 42, sand retaining ring 44 is set, also back blades 45 can be set again, the purpose effect of this structure and accompanying drawing 10 is identical.

The impeller that above-mentioned sand prevention ring 44 and back blades 45 are arranged is also applicable to the structure like Fig. 2, Fig. 4.

Claims

1. sand control deep-well pump; Mainly comprise motor, pump barrel, pump shaft, water inlet joint, water outlet joint, impeller, stator or stator seat, stator cover plate, between the levels that the impeller port ring that it is characterized in that pump and stator cover plate or stator seat are formed between sealing surface position or vertical level the upper end position of sealing surface be higher than the bottom surface of stator cover plate or stator seat.

2. deep-well pump according to claim 1 is characterized in that the polymer and the composite material thereof of the circular or tubular of one or both sides welding one deck of inter-stage sealing surface.

3. according to the 1 described deep-well pump that requires of right, it is characterized in that stator cover plate or stator seat process with stainless steel or inlay stainless steel at inter-stage sealing surface place.

4. according to claim 1 or 2 or 3 described deep-well pumps, it is characterized in that impeller port ring arranged outside sand retaining ring.

5. deep-well pump according to claim 4 is characterized in that impeller sand retaining ring arranged outside back blades.