CN213235472U

CN213235472U - Air-cooled magnetic drive centrifugal pump capable of conveying slurry

Info

Publication number: CN213235472U
Application number: CN202021745715.7U
Authority: CN
Inventors: 蒋龙福; 蒋凌超; 张辉雄; 王岩
Original assignee: Yixing Zeus Pump Manufacture Co ltd
Current assignee: Yixing Zeus Pump Manufacture Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-05-18
Anticipated expiration: 2030-08-20

Abstract

The utility model discloses a can carry forced air cooling magnetic drive centrifugal pump of ground paste, including pump case, median septum, spacer sleeve, hookup support, outer magnet steel rotor subassembly and motor, pump case, median septum, spacer sleeve constitute and seal the chamber, seal the intracavity and be provided with impeller, main shaft, interior magnet steel rotor subassembly, and outer magnet steel rotor subassembly includes outer magnet steel fixing base, outer magnet steel and rotation axis, and the rotation axis is connected with the motor, is provided with the wind wheel on rotation axis or the outer magnet steel fixing base. Can transport slurry containing solid without leakage.

Description

Air-cooled magnetic drive centrifugal pump capable of conveying slurry

Technical Field

The utility model relates to a magnetic drive centrifugal pump preparation field especially relates to anticorrosive centrifugal pump of plastics.

Background

In the prior art, the magnetic drive centrifugal pump is generally used for conveying clear liquid media in the field of industrial production, and the technical difficulty that the magnetic drive centrifugal pump can convey slurry is not broken through for a long time.

The reason why the magnetically driven centrifugal pump cannot convey slurry is that: the magnetic pump has the advantages that the requirement on the distance between the inner magnetic steel and the outer magnetic steel is high, the distance is large, the acting magnetic force of the inner magnetic steel and the outer magnetic steel is influenced, the inner magnetic gap and the outer magnetic gap contain the isolation sleeve and cannot exceed about 5mm, therefore, the distance between the inner magnetic rotor 1 and the isolation sleeve 2 can be only set to be about 0.4-0.6 mm (as shown in figure 1), when the pump runs in the gap, hard solid particles in conveyed materials can clamp the magnetic steel, scratch the isolation sleeve or reduce the mobility, further the temperature of fluid in the magnetic steel part is increased, and then the pump component is damaged. Thus, no mature such technique has been found in the prior art for delivering slurry using magnetic pumps. On the other hand, the centrifugal slurry pump in the prior art adopts the mechanical seal as the shaft seal, so the centrifugal slurry pump also has the conditions of easy leakage and easy damage, has a large distance with the requirement of a non-leakage pump, and the mechanical seal matched with the slurry pump has high cost, which almost accounts for half of the operation consumption cost of pump accessories.

The above-mentioned deficiencies of the prior art still need to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide one kind can carry the air-cooled magnetic drive centrifugal pump that contains solid ground paste, the leak-free ground paste of carrying.

For realizing the purpose of the utility model, the following technical proposal is provided: the air-cooled magnetic driving centrifugal pump capable of conveying slurry comprises a pump shell, a middle partition plate, an isolation sleeve, a connecting support, an outer magnetic steel rotor assembly and a motor, wherein the pump shell, the middle partition plate and the isolation sleeve form a closed cavity, an impeller, a main shaft and an inner magnetic steel rotor assembly are arranged in the closed cavity, and the air-cooled magnetic driving centrifugal pump is characterized in that the outer magnetic steel rotor assembly comprises an outer magnetic steel fixing seat, an outer magnetic steel and a rotating shaft, the rotating shaft is connected with the motor, and a wind wheel is arranged on the rotating.

Preferably, the end of the external magnetic steel fixing seat is provided with a vent hole.

Preferably, the connecting bracket is provided with an air outlet.

Preferably, the impeller is installed in the pump case, the impeller, the shaft sleeve, interior magnet steel rotor cover is located on the main shaft, the cover is equipped with the supporting sleeve on the shaft sleeve, the cover is equipped with sand control retaining ring on its characterized in that shaft sleeve, sand control retaining ring is arranged in between median septum and the shaft sleeve, cavity between median septum periphery and the isolation sleeve constitutes interior magnetism rotor cavity, seted up on the isolation sleeve or the median septum and annotated the interior magnetism rotor cavity of liquid mouth intercommunication, seted up the cooling water hole on the median septum of sand control retaining ring department, the interior magnetism rotor cavity of cooling water hole intercommunication.

Preferably, the sand prevention check ring is a lip-shaped rubber ring or a plane friction pair.

Preferably, the isolation sleeve or the middle clapboard is provided with a liquid outlet.

Preferably, the impeller radial plate is provided with a solid-liquid separation groove, and the impeller radial plate is internally provided with a slag discharge hole communicated with the solid-liquid separation groove.

Preferably, the spacer sleeve outer circumferential portion is provided with a heat dissipating fin.

Preferably, the isolation sleeve comprises an inner plastic layer and an outer metal sleeve.

The utility model discloses beneficial effect:

1. the magnetic drive pump that makes can not carry the ground paste can carry the ground paste, has overturned the cognition that the magnetic drive pump can not carry the ground paste for a long time, because the magnetic drive centrifugal pump is the centrifugal pump of no leakage point, just provides a no leakage ground paste centrifugal pump for the user after the structural improvement, has satisfied the no requirement of leaking the environmental protection in the industrial production field.

2. Because this slurry pump does not have the leak source, and is not fragile, has effectively promoted the security, the reliability of chemical industry equipment, makes the overhaul of the equipments cycle extension, and then has promoted the stability of equipment.

3. Because the utility model discloses a no leakage ground paste magnetic drive pump does not use mechanical seal, utilizes fluid pressure balance ingeniously and seals the slurry in the pump chamber and leak, need not use mechanical seal, can save the maintenance of machine seal, the spending of changing for the user, makes the user practice thrift the use cost of equipment.

4. Due to the arrangement of the air cooling system, the use of cooling water can be reduced, and the consumption of water is saved.

Drawings

FIG. 1 is a schematic structural diagram of a magnetic pump in the prior art;

FIG. 2 is a schematic view of the structure of embodiment 1;

FIG. 3 is an enlarged partial schematic view of the impeller and rotor portion of FIG. 2;

FIG. 4 is a schematic structural view of example 2;

FIG. 5 is a schematic structural view of a sand-proof retainer ring provided with through holes;

FIG. 6 is a schematic structural view of embodiment 3;

FIG. 7 is another configuration of FIG. 6;

FIG. 8 is a schematic structural view of example 4;

fig. 9 is a perspective view of the spacer sleeve with heat dissipating fins disposed on the outer periphery thereof.

Detailed Description

Example 1: as shown in fig. 2, 3 and 4, the air-cooled magnetic drive centrifugal pump capable of conveying slurry comprises a pump shell 1, a middle partition plate 3, an isolation sleeve 6, a connecting support 10, an external magnetic steel rotor assembly 7 and a motor 11, wherein the pump shell 1, the middle partition plate 3 and the isolation sleeve 6 form a closed cavity, an impeller 2, a main shaft 4 and an internal magnetic steel rotor assembly 5 are arranged in the closed cavity, the external magnetic steel rotor assembly 7 comprises an external magnetic steel fixing seat 7.1, an external magnetic steel 7.3 and a rotating shaft 7.4, the rotating shaft 7.4 is connected with the motor 11, and a wind wheel 9 is arranged on the rotating shaft 7.4. The end of the external magnetic steel fixing seat 7.1 is provided with a vent hole 7.2. An air outlet 10.1 is arranged on the connecting bracket 10. Impeller 2 installs in pump case 1, the closed intracavity is arranged in to main shaft 4, impeller 2, axle sleeve 17, interior magnet steel rotor 5 cover is located on main shaft 4, the cover is equipped with supporting sleeve 8 on the axle sleeve 17, the cover is equipped with two sand control retaining rings 16 on the axle sleeve 17, sand control retaining ring 16 is arranged in between median septum 3 and the axle sleeve 17, sand control retaining ring 16 is lip rubber circle 16.1, cavity between 3 peripheries of median septum and the isolation sleeve 6 constitutes interior magnet rotor cavity 19, seted up on the isolation sleeve 6 and annotated interior magnet rotor cavity 19 of liquid mouth 12 intercommunication, seted up leakage fluid dram 15 on the isolation sleeve 6, offered cooling water hole 18 on the median septum 3 of sand control retaining ring 16 department, interior magnet rotor cavity 19 of cooling water hole 18 intercommunication. The insulating sleeve 6 comprises an inner plastic layer 6.1 and an outer metal sleeve 6.2.

As shown in fig. 4, the sand control retainer ring 16.1 is provided with a through hole 16.1.1 and a filtering core 16.1.2. The through hole 16.1.1 is arranged to make the liquid in the rotor cavity flow and circulate to the pump volute cavity, so that the temperature of the fluid in the magnetic steel rotor part does not rise due to the rotation of the rotor, and the safety of the inner magnetic rotor is ensured; the purpose of the filter cartridge 16.1.2 is to prevent solid particles from entering the internal magnetic rotor cavity through the through-holes.

In order to reduce solid in the fluid at the position of the sand prevention check ring, make the partial fluid in a clear liquid state and prolong the service life of the sand prevention check ring, the good method is that a solid-liquid separation groove 2.2 is arranged on an impeller radial plate, and a slag discharge hole 2.3 communicated with the solid-liquid separation groove is arranged in the impeller radial plate. The fluid at the sand prevention check ring part rotates in the separation cavity, the solid in the fluid in the separation cavity is separated out under the action of gravity and centrifugal force, and then the fluid is discharged from the slag discharge hole 2.3. Through the arrangement, the solid content of the fluid of the main shaft 4 and the sand control check ring 16 can be effectively reduced, the sand control check ring 16 and the main shaft supporting sleeve 8 can run in a clean liquid state, and the service life of the sand control check ring and the supporting sleeve is ensured.

The purpose of setting up notes liquid mouth is to annotate the liquid to interior magnet steel appearance chamber, and the temperature of the interior magnet steel appearance intracavity liquid of cooling.

The manufacturing method is to use the metal shell to be lined with the ultra-high molecular weight polyethylene to manufacture the plastic-lined pump volute 1.

The impeller 2 is manufactured by an ultra-high molecular weight polyethylene hot press molding method, and a metal embedded part 2.1 is embedded in the impeller, wherein the purpose of embedding the metal embedded part is to increase the strength of the impeller.

The middle clapboard 3 is manufactured by the hot-press molding process of ultra-high molecular weight polyethylene, and a metal framework 3.1 is additionally arranged in the middle clapboard.

The isolation sleeve 6 is made of polyphenylene sulfide (PPS), the rotor body 5 is made of samarium cobalt permanent magnet, the rotor body is wrapped by a plastic anticorrosive layer 5.1, and the isolation sleeve is provided with a liquid injection port 12 and a liquid discharge port 15.

And selecting duplex stainless steel to manufacture the main shaft 4.

Selecting and filling PTFE to manufacture the supporting sleeve 8.

The external magnetic steel rotor component 7, the motor 11 and the connecting bracket 10 are purchased and manufactured according to the manufacturing requirements of the conventional magnetic pump.

The components of the magnetic pump are respectively assembled and installed together by a pump shell 1, an impeller 2, a middle partition plate 3, a main shaft 4, an internal magnetic steel rotor component 5, a supporting sleeve 8, an isolation sleeve 6, an external magnetic steel rotor component 7, an installation bracket 10 and a motor 11 according to the conventional installation method of the magnetic pump. And at main shaft portion installation sand control retaining ring 16, deposit the liquid chamber at the rotor and set up annotate liquid mouth 12 and input pipeline 14, hookup liquid source 13, just can obtain the magnetic drive pump that can carry the ground paste test again, pack the back, can provide the product finished product to the user.

The pump shell 1 can be made of an all-plastic structure or made of wear-resistant metal alloy as long as the requirement of slurry conveying can be met.

The impeller 2 may be made of a non-metal material or a metal material, and the present invention is not limited thereto.

The impeller 2 may be open, semi-open, closed.

The middle partition plate 3 can be of a metal composite plastic structure or a metal structure, and aims to meet the requirements of wear resistance and corrosion resistance and bear the movement supporting force of the main shaft.

The supporting sleeve 8 can be made of other metal or non-metal materials, such as silicon carbide, carbon graphite, phosphor bronze, etc., and whatever material is used, so long as the using requirement of the actual working condition can be met, which is also within the meaning and coverage of the utility model.

The sand control retainer ring 16 can be made of lip-shaped rubber rings 16.1 or other wear-resistant sealing materials.

In this embodiment, the drain hole 3.2 formed in the middle partition plate is formed in a portion, and the drain hole in the cavity of the inner magnetic steel rotor in this embodiment may also be formed in a sand-proof check ring 16.1 (see fig. 4).

The aperture size and the number of the holes of the drain hole are determined according to the condition of the medium conveyed by the pump, the conveying medium has no requirement of inner discharge limitation, the drain hole can be provided with a large cross section area, otherwise, the drain hole can be provided with a small cross section area.

The isolation sleeve can be made of engineering plastics such as fluoroplastic, polypropylene and the like, or a high-temperature-resistant and high-strength polyphenylene sulfide single layer or composite, or can be made of a metal composite double layer.

Example 2: referring to the embodiment 1, as shown in fig. 4 and 5, the other features are unchanged, the pump housing 1 and the pump cover 16 are manufactured separately, the liquid injection port 12 is formed on the middle partition plate 3 and communicated with the inner magnetic rotor cavity 19, and the liquid discharge port 15 is formed on the middle partition plate 3. In order to ensure that the fluid in the pump shell cavity 1.1 does not pass through the main shaft bearing sleeve 8 and flows back into the inner magnetic rotor cavity 6.1, so that the cooling liquid in the rotor cavity is clean, the effective method is to arrange back blade strips 2.4 (shown in figure 5) on the back of the impeller, and when the pump runs, the fluid in the bearing sleeve part of the main shaft is decompressed through the centrifugal action of the back blade strips.

Example 3: referring to the embodiment 1, as shown in fig. 6 and 7, the rest characteristics are unchanged, and the sand prevention check ring is a plane friction pair 9.2, namely a mechanical seal. The mechanical seal replaces the sand blocking function of the lip-shaped rubber ring, is suitable for and meets the requirements that some conveying materials cannot be filled with water or seeped with water and have limited post positions requiring internal cooling water drainage.

Another purpose of adopting the built-in mechanical sealing structure is to overcome the requirement of solving the working condition that some rubber materials for the sand blocking ring sleeve are not suitable for, such as the transportation of slurry containing solvent.

Example 5: referring to embodiment 1, as shown in fig. 8 and 9, referring to embodiment 1, the end of the external magnetic steel fixing seat 7.1 of the external magnetic steel rotor assembly 7 is provided with a fan blade 9 integrally manufactured with the external magnetic steel fixing seat 7.1. The outer circumference of the isolation sleeve 6 is provided with a radiating fin 6.3.

When the pump works and operates, wind power generated by the wind wheel 9 enters a gap between the isolation sleeve 6 and the outer magnetic steel rotor assembly 7 to cool the outer surface of the isolation sleeve 6, and the further purpose is to cool liquid inside the isolation sleeve 6. During the operation of the magnetic pump, the inner magnetic rotor 5 generates friction with the liquid in the spacer sleeve 6, so that the temperature of the externally injected cooling liquid is increased. In order to control the cooling liquid of the inner magnetic steel part within the safe range of about 80 ℃ and ensure the safe operation of the magnetic pump, the effective method is that the injection amount of the external source liquid is increased by the liquid injection port 12, so that the overflow of the cooling liquid of the inner magnetic steel part is increased, and the purpose of cooling is achieved.

In the embodiment, the air cooling system is arranged at the inner magnetic steel part and the outer magnetic steel part, so that the outer air cooling is carried out on the inner magnetic steel part, the temperature of the inner magnetic steel part is reduced, the injection amount of cooling water of an external liquid source is further reduced, and the purpose of saving water is achieved.

In order to increase the heat dissipation performance of the isolation sleeve, the isolation sleeve is made of materials with good heat conductivity coefficient performance, such as aluminum alloy, magnesium alloy, steel alloy and the like with good heat conductivity coefficient.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The air-cooled magnetic driving centrifugal pump capable of conveying slurry comprises a pump shell, a middle partition plate, an isolation sleeve, a connecting support, an outer magnetic steel rotor assembly and a motor, wherein the pump shell, the middle partition plate and the isolation sleeve form a closed cavity, an impeller, a main shaft and an inner magnetic steel rotor assembly are arranged in the closed cavity, and the air-cooled magnetic driving centrifugal pump is characterized in that the outer magnetic steel rotor assembly comprises an outer magnetic steel fixing seat, an outer magnetic steel and a rotating shaft, the rotating shaft is connected with the motor, and a wind wheel is arranged on the rotating.

2. The air-cooled magnetically-driven centrifugal pump according to claim 1, wherein the outer magnet holder is provided with ventilation holes at its ends.

3. The air-cooled magnetically-driven centrifugal pump according to claim 1, wherein the coupling bracket is provided with an air outlet.

4. The air-cooled magnetic-driven centrifugal pump capable of conveying slurry according to claim 1, wherein the impeller is installed in a pump housing, the impeller, a shaft sleeve and an inner magnetic steel rotor are sleeved on the main shaft, a supporting sleeve is sleeved on the shaft sleeve, and a sand prevention check ring is sleeved on the shaft sleeve and is arranged between the middle partition plate and the shaft sleeve, a cavity between the periphery of the middle partition plate and the isolating sleeve forms an inner magnetic rotor cavity, a liquid injection port communicated with the inner magnetic rotor cavity is formed in the isolating sleeve or the middle partition plate, a cooling water hole is formed in the middle partition plate at the sand prevention check ring, and the cooling water hole is communicated with the inner magnetic rotor cavity.

5. The air-cooled magnetically-driven centrifugal pump capable of transporting slurry of claim 1, wherein the sand control retainer ring is a lip rubber ring or a planar friction pair.

6. The air-cooled magnetically-driven centrifugal pump capable of transporting slurry as claimed in claim 1, wherein the spacer sleeve or the intermediate partition plate is provided with a liquid outlet.

7. The air-cooled magnetically-driven centrifugal pump capable of conveying slurry as claimed in claim 1, wherein the impeller web is provided with a solid-liquid separation tank, and the impeller web is provided with a slag discharge hole communicated with the solid-liquid separation tank.

8. The air-cooled magnetically driven centrifugal pump according to claim 1, wherein the spacer sleeve has heat dissipating fins on its outer periphery.

9. The air-cooled magnetically driven centrifugal pump of claim 1, wherein the spacer sleeve comprises an inner plastic layer and an outer metal sleeve.