Do a good job centrifugal pump impeller maintenance must first understand the impeller material, the common impeller material is based on the media situation combined with the pump structure type to determine, there are a good variety. Such as cast iron, cast steel, stainless steel, cast copper, etc., there are many specific brands in each category, according to different materials commonly used impeller repair methods are the following:
1: Copper wire repair method (for copper material impeller)
For pinhole cavitation, as long as the hole is not connected into a sheet, the copper wire can be used to hit the pinhole, and the cleaver can be used to dip light. Before processing, the rust and dirt on the surface of the blade should be removed with a grinder, and then the air-hole debris should be blown off with an oxygen-acetylene flame, and then the appropriate thickness of copper wire should be filled into the hole. At the same time, tapping with a pointed hammer, the copper The wire is squeezed, squeezed into the hole, and finally raked with a trowel.
2: Epoxy resin repair method according to the ratio, heat preservation gear pump order take appropriate amount of epoxy resin, ethylene diamine, dibutyl phthalate, acetone in glassware mixing, mix well. When stirring, pay attention to the consistency of the adhesive and add the amount of acetone. The best epoxy resin is used up within 20-30min. Draw epoxy resin with a wool brush, brush the surface of the blade with blisters and pores. When brushing, use a pointed cone to gently extrude blisters, air bubbles in the air hole, and apply as evenly as possible. At the same time, gently scrape the pressure with a scraper. real. After the epoxy resin is cured for 1-2 hours, it is brushed for 2 to 3 times. When brushing the last time, make sure that the surface of the blade is smooth and smooth. After brushing is completed, the impeller is maintained at 20-30°C and low relative humidity for 48 hours. After the epoxy resin is completely cured, the outline of the impeller and the projection on the surface layer are trimmed with a file or grinder.
3: Quick steel repair method Single-stage single-suction centrifugal pump is a cement adhesive repair agent before curing. After curing, it has high strength, high hardness, no shrinkage and no rust. It is suitable for steel, iron and other metal materials. The pores, cracks, trachoma, etc. are filled and repaired with strong adhesive effect. Before the repair, clean the rust and dirt around the intended repair site and roughen it. Take out the colloid in the quick steel plastic tube, and quickly and fully knead the two different colors of the colloidal body and the skin into one color (about 1 to 2 minutes), and it is better to achieve heat and softness. Before the accelerated steel colloid is to be solidified, it is firmly adhered to the repair site and compacted with force (hands or tools) several times during the solidification process of the colloid to enhance the adhesion between the glue and the blade. After the accelerated steel has hardened, flatten it with a trowel.
4: Gas welding repair method The impeller is placed on a charcoal fire and heated to 400-500°C. Tin is hanged at the repair welding place, and then the brass wire is melted into the groove or hole to be repaired by the oxygen-acetylene flame, and the welding is completed. Go to a charcoal fire, cover the insulation with an asbestos plate, and allow the leaves to cool slowly to avoid cracks. After welding, the boring tool is used to trim the original contour line.
Characteristics and Advantages
(1) Intelligent control design: adjustable main parameter and secondary parameter automatically according to the weight of door leaves;
(2) Low noise: Special static sound track, integration of motor, worm-gear and retarder.
(3) Anti-clamping function: automatically reverse when meeting barriers;
(4) Unique electronic motor lock: the motor will lock up when the door is forced to open.(controlled by remote or switch)
(5) Tighten force: seal door when closed, power consumption approximately 10W under standby;
(6) Advanced brushless motor(36V,100W) can automatically adopt different heavy door leaves;
(7) Bi-doors inter-locking: one of the door leaves always remains closing;
(8)Safety sensor terminal: sensor stops working when door closed;
(9)Unique coating technology: never rusty;
(10)Easy and convenient to install;
(11)Working Process: when the door leaf closes to the right place, the door leaf will slightly shift to the door frame and the ground. The rubbers on the four sides of the door leaf will completely combine with door frame and ground, which ensures air tightness. When the door is open, the rubbers will separate from door frame and ground, which avoids contraction on the ground.
Technical Specification
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Specification |
Light Duty |
Heavy Duty |
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Rang of the Door |
Single-Leaf |
Double-Leaf |
Single-Leaf |
Double-Leaf |
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Door leaf max weight |
100kg |
100kg x 2 |
200kg |
200kg x 2 |
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Mounting Method |
Surface mounting or built-in mounting |
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Open Width |
700-2000mm |
650-2000mm |
750-2000mm |
650-2000mm |
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Power Supply |
AC 220v ± 10%, 50-60 Hz |
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Opening Speed |
300-500mm/s (adjustable) |
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Closing Speed |
250-550mm/s (adjustable) |
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Creep speed |
30-100mm/s (adjustable) |
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Hold-open time |
0.5-20s (adjustable) |
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Airproof Force (Max.) |
>70N |
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Manual Pushing Force |
<100N |
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Electronic Lock Force |
>800N |
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Power consumption |
150W |
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Ambient temperature |
-20+50 C |
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Technical Details:
(1) Rubber lining sealing technology combined with V groove on the guide rail enables the door completely sealed when the door closed;
(2)Special door body location technology. Semicircular surface beam on the ground matches with the V style groove at the bottom of door leaf, which stop the door from swing and make sure it moves stable and smooth;
(3) The door body decorated with matte stainless steel or spray surface, and on the middle and both sides with sealing stripes to ensure the hermetic effect.
(4)Feet sensor switch applied to avoid contagion;
Stainless Steel Sliding Door,Stainless Steel Bypass Sliding Door,Stainless Steel Interior Sliding Door,Stainless Steel Folding Sliding Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com