Corrosion-resistant and wear-resistant chemical centrifugal pump

Abstract

A corrosion-resistant and wear-resistant chemical centrifugal pump is provided, including a pump body, an impeller nut, an impeller, a pump cover, a mechanical sealing set, a sealing box, a shaft sleeve, a bracket, a bearing gland, a bearing, a pump shaft and a suspension support; the pump body is connected to the suspension bracket by a bolt and a base; the mechanical sealing set includes a moving mechanical sealing ring and a stationary mechanical sealing ring, wherein the moving mechanical sealing ring is provided on the impeller; the pump cover, together with the sealing box and the mechanical sealing set, is provided on a pump shaft, wherein the pump cover is connected to the sealing box by a bolt; the stationary mechanical sealing ring, a stationary ring seat and a spring are arranged between the pump cover and the sealing box; and the shaft and the bracket are detachably connected.

1 . A corrosion-resistant and wear-resistant chemical centrifugal pump, comprising:
 a pump body, an impeller nut, an impeller, a pump cover, a mechanical sealing set, a sealing box, a shaft sleeve, a bracket, a bearing gland, a bearing, a pump shaft and a suspension support; the pump body is connected to the suspension support; the pump body is fixed on the bracket; the mechanical sealing set includes a moving mechanical sealing ring and a stationary mechanical sealing ring, wherein the moving mechanical sealing ring is provided on the impeller; the pump cover, together with the sealing box and the mechanical sealing set, is provided on a pump shaft, wherein the pump cover is connected to the sealing box by a bolt; the stationary mechanical sealing ring, a stationary ring seat and a spring are arranged between the pump cover and the sealing box; the shaft sleeve is sleeved on the shaft; the bearing gland is connected onto the bracket; and the shaft and the bracket are detachably connected.   
     
     
         2 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 1 , further comprising a water-cooling system which comprises a cooling water nozzle and a cooling water pipeline connected to the cooling water nozzle. 
     
     
         3 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 2 , wherein the corrosion-resistant and wear-resistant chemical centrifugal pump is a single-stage and single-suction horizontal centrifugal pump. 
     
     
         4 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 3 , wherein a diameter of the corrosion-resistant and wear-resistant chemical centrifugal pump is between 25 mm and 500 mm. 
     
     
       5. The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 4 , wherein a flow of the corrosion-resistant and wear-resistant chemical centrifugal pump is between 1.6 m 3 /h and 3000 m 3 /h. 
     
     
         6 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 5 , wherein an overflow component of the corrosion-resistant and wear-resistant chemical centrifugal pump is made of duplex stainless steel. 
     
     
         7 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 6 , wherein an applicable temperature of the corrosion-resistant and wear-resistant chemical centrifugal pump is between −20° C. and +150° C. 
     
     
         8 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 7 , wherein an applicable medium for the corrosion-resistant and wear-resistant chemical centrifugal pump is acid, alkali and/or salt of any concentration with a content of solid being lower than or equal to 40%, medium particles being hard and/or soft. 
     
     
         9 . The corrosion-resistant and wear-resistant chemical centrifugal pump according to  claim 1 , wherein the applicable medium for the corrosion-resistant and wear-resistant chemical centrifugal pump is lime slurry, mud slurry, cinder liquid, slag liquid, waste acid and/or sewage. 
     
     
         10 . A method for mounting the corrosion-resistant and wear-resistant chemical centrifugal pump, comprising the following steps:
 A. checking for a net positive suction head when the pump operation exceeds the maximum net positive suction head permitted by the pump; if the net positive suction head when the pump operation exceeds the maximum net positive suction head, stopping the mounting process, and if the net positive suction head when the pump operates does not exceed the maximum net positive suction head, continuing the following steps;   B. providing a separated support for a liquid inlet and a liquid outlet of the pump;   C. making a foundation plane for mounting the pump by foundation concrete; after the concrete is solidified, placing the pump on the foundation plane; checking whether the pump is leveled with a motor shaft or not by a level; if the pump is not leveled with the motor shaft, aligning them with a sizing block until they are leveled with each other; and then, grouting concrete into a base and an anchor bolt hole by a grouting hole;   D. after the concrete becomes dry and solid, checking whether the base is loose from the anchor bolt hole; if the base is not loose from the anchor bolt hole, tightening an anchor bolt, and checking the levelness again; checking an concentricity between the pump shaft and the motor shaft, and measuring an excircle of a coupling, with a difference between up and down, right and left being lower than or equal to 0.1 mm, and a difference between a maximum gap and a minimum gap of a gap between end surfaces of two couplings on a circle being not more than 0.3 mm; and   E. when a mounting position of the pump is higher than a liquid level, mounting a bottom valve on a bottom end of a liquid inlet pipe, and providing a threaded grouting hole or a valve on a liquid outlet pipe to fill the pump before startup; and when a mounting position of the pump is lower than a liquid level, mounting a control valve and a filtering device on the liquid inlet pipe of the pump to prevent large sundries from being sucked into the pump.