CN202002511U - Pre-rectifier with automatic backwashing dirt removal function - Google Patents

Abstract

The utility model provides a pre-rectifier with an automatic backwashing dirt removal function. An electric decelerating mechanism (1) mounted at the middle part of a housing (2) is in meshing transmission with a pin wheel (4) through pin teeth; a closed rolling bearing chamber (15) is positioned in a wheel hub (25) and connected by a hexagon socket screw; a shaft seat (11) is positioned in the middle position of the lower part of the housing (2) and connected with the housing (2) by a supporting rib (7) and a dirt discharging hopper (5); a main shaft (12) is inserted in a hole of the shaft seat (11) and connected by a hexagon socket screw; and an elastic sealing piece (6) is mounted on the upper edge of the dirt discharging hopper (5). The device adopting a square-shaped grid net core, streamline-shaped net strips, a plane layout, a pin tooth transmission manner, rolling bearings and special bearing parts can eliminate the phenomenon of rotary net core deadlocking, improve the operation reliability, and ensure than the rotating parts rotates flexibly and reliably; and the device adopts a net core rotary backwashing manner, so that two dirt removal mechanisms, namely rotary washing and backwashing, can be formed, thereby improving the dirt removal effect.

Description

A kind of preposition rectifier with automatic backwash decontamination function

Technical field

The utility model patent is to belong to fluid commutation technique field, and particularly a kind of preposition rectifier unit with automatic backwash decontamination function is the power plant to be entered circulation of fluid before the shell-and-tube heat exchanger hydroecium is carried out rectification and secondary filter purifies specifically.

Background technology

Shell-and-tube heat exchanger is widely used at industrial circles such as electric power, petrochemical industry.The on-the-spot pipeline placement variation of shell-and-tube heat exchanger is more, and be in operation the unstable phenomenon of circulation of fluid flow velocity is all arranged, the fluid that causes entering hydroecium forms bigger dead band and vortex easily, impurity that carries in the fluid and the dirt contamination, obstruction and the scale formation that very easily cause heat exchanger simultaneously particularly adopts the condenser, water cooler of recirculated cooling water cooling etc.The dead band of heat exchanger, vortex can cause the heat transfer coefficient of equipment to reduce, energy consumption increases, can cause local pipe inner fluid to flow simultaneously to slow down even not mobile, thereby plugging or dirt deposition occur and cause equipment normally to move, very easily fouling of the part of dead band and vortex thus, also can form underdeposit corrosion after the fouling, shorten the service life of equipment.At present, shell-and-tube heat exchanger particularly the online glueballs cleaning technique of plant condenser widespread usage in conjunction with the secondary filter purification techniques.But the fluid to be injected (comprising glueballs) of ball cleaning apparatus enters the influence that condenser water box obviously is subjected to dead band and vortex, make the most of whirlpool of sponge glueballs that participates in cleaning in the middle of the vortex, dead band, the pipe that cleans to only accounts for a wherein part, the pipe that is not cleaned be because the influence of dead band, vortex can only further cause the dirt deposition of pipe, do not have forever in the middle of the vicious circle that glueballs passes through.The secondary filter that is used in combination is installed in the import circulating water pipe place of Turbo-generator Set condenser, and the foreign material that may stop up condenser tube sheet and pipe are just removed in effect.But the device structure size is big, the loss in head height, and do not have the function in the condenser water box of improvement flow field.

The purpose of the utility model patent is in order to improve the mobile state of recirculated water, to improve heat exchange efficiency, optimize the flow regime of condenser water box simultaneously, reduce dead band, the vortex of condenser water box, improving the cleaning efficiency of ball cleaning apparatus sponge glueballs.Improve the filth-discharging effect and the device utilization rate of recirculated water secondary filter purifier in addition, reduce the water resistance and the appearance and size of device.

Summary of the invention

At fluid rectification the deficiencies in the prior art, the purpose of this invention is to provide the impurity and the dirt that leach in a kind of preposition rectifier unit with automatic backwash decontamination function, particularly convection cell switching process and can realize automatic backwash.

The technical solution of the utility model is a kind of preposition rectifier with automatic backwash decontamination function, the electric reducer structure and the pin wheel that are contained in the shell middle part are pin tooth engaged transmission, collect dirty frame, web-roll core and pressure frame order are between 4 spokes, collect dirty frame and press frame to be connected with spoke with bolt respectively, the closed type rolling bearing chamber is positioned at wheel hub, and connect with soket head cap screw, axle bed is positioned at the outer casing underpart middle position, be connected with shell with blowdown funnel with supporting rib, main shaft inserts in the axle bed hole, connect with soket head cap screw, the top edge of blowdown funnel is equipped with elastic sealing element.

Preposition rectifier with automatic backwash decontamination function of the present utility model, being positioned at the dirty frame of collection and pressing the middle fan-shaped web-roll core of frame is by the cross-coupled structure of two-layer streamlined stainless (steel) wire bar.Preferably, this web-roll core is the groined type lattice structure that is combined into by streamlined net bar.

Preposition rectifier with automatic backwash decontamination function of the present utility model, its bearing chamber is enclosed structure, the self-aligning thrust roller bearing that in bearing chamber, has two cover symmetries to install, be located on main shaft by load dish and two round nuts, outside framework oil seal and main shaft seal are arranged at the bottom of bearing chamber, and top has sealing gasket to be connected sealing with last cover with bolt.

Preposition rectifier with automatic backwash decontamination function of the present utility model is the transmission of pin tooth, and the rotating speed of rotation pin wheel is 0.2～0.4 rev/min.

The purpose of this utility model is achieved in that and adopts pin tooth transmission rotation web-roll core that it can will be clipped in falling less than the hard foreign material fragmentation of φ 6mm of pin between cog.Web-roll core is combined into the groined type lattice structure by two-layer streamlined stainless (steel) wire bar intersection, can either eliminate by velocity head deviation, the convection cell of outside current in the web-roll core and realize rectified action, can filter out the impurity greater than mesh diameter again; Because of the resistance coefficient minimum of streamlined net bar, so the water resistance of whole device and appearance and size have all reduced.Fan-shaped blowdown funnel is equipped with elastic sealing element, and this has just strengthened the blowdown dynamics, has improved filth-discharging effect.

The bearing portions assembly of pin wheel adopts closed grease lubrication rolling bearing cell structure, and it is safe and reliable flexibly that the rotation net core assembly is rotated.

The utility model is compared with other pattern rectifying installations of same bore and same traffic possesses following notable feature: the rotation net core assembly can be not stuck by foreign material, it is flexible, safe and reliable to rotate; Backwash great efforts filth-discharging effect height, spinning reaches best in conjunction with the self-cleaning rate of recoil mechanism; Water resistance is little in light weight, and the height of contour size is little, has the rotation filter core backwash decontamination function that other pattern rectifying installations do not possess fully simultaneously.Can effectively improve the mobile state of recirculated water, a deviation of regulating the speed, the effect of raising heat exchange efficiency.

Description of drawings

Drawing explanation of the present utility model: Fig. 1 is a kind of section of structure with preposition rectifier of automatic backwash decontamination function that proposes according to the utility model patent: Fig. 2 is that the vertical view of A-A section among Fig. 1: Fig. 3 is the upward view of A-A section among Fig. 1; Fig. 4 and Fig. 5 are that original state schematic diagram: Fig. 6 and Fig. 7 filter contamination process status schematic diagram: Fig. 8 and Fig. 9 are the blowdown view.

The specific embodiment

Describe the CONSTRUCTED SPECIFICATION of the concrete device embodiment that the utility model proposes in detail below in conjunction with Fig. 1, Fig. 2, Fig. 3.

Electric reducer structure 1 is installed in the middle part of shell 2.Bearing pin 26 and sealing shroud 29 are housed on pin wheel 4.With 32 bolts 4 dirty framves 8 of collection are fixed on the spoke 28 of pin wheel 4, each collects dirty frame and contains 2-4 fan-shaped collecting sewage room 31.Preposition rectifier with automatic backwash decontamination function has 4 fan-shaped web-roll cores 3, and every web-roll core is by two-layer streamlined stainless (steel) wire bar 30, and the cooperation that intersects reaches between the foxing each other, with argon arc solder joint jail.With pressing frame 10 that fan-shaped web-roll core 3 is fixed on the dirty frame 8 of collection.With two supporting ribs 7 and blowdown funnel 5 with the middle position of axle bed 11 solid weldings in shell 2 bottoms.The edge of blowdown funnel 5 is fan-shaped, in its top elastic sealing element 6 is housed, and the angle of top edge is bigger than the fan-shaped angle of collecting sewage room 31.Main shaft 12 usefulness soket head cap screws 13 are fixed on the axle bed 11, and in the bearing chamber 15, the self-aligning thrust roller bearing 22 and the outside framework oil seal 14 that have two cover symmetries to install are fixed on bearing chamber 15 on the wheel hub 25 of pin wheel 4 with soket head cap screw 16.With two round nuts 19 and floor clip 21 load dish 17 is positioned on the main shaft 12, positioning key 18 is set for preventing that the load dish from rotating.After being full of lubricating grease in the bearing chamber, sealing gasket 24 and last cover 20 are fixed on the bearing chamber 15 with bolt 23.

The course of work of the present utility model is divided into the rectification course of work and dirt scale removal process: 1) the rectification course of work: equipment is installed in the circulation line, fluid passes through the rectification web-roll core of the groined type lattice structure that is combined into by streamlined net bar, single line body is balanced rectification, forms the approximate ideal fluid.Fluid mixes the big impurity that contains in the middle of the fluid, dirt will be by filtering on the rectification web-roll core in by switching process.For guaranteeing rectification effect, need periodic cleaning rectifier web-roll core.2) cleaning work process is as follows: in original state and filtration contamination process status, blowdown butterfly valve 27 cuts out, and electric reducer structure 1 and pin wheel 4 stop.After web-roll core 3 front and back pressure differentials reach definite value, will start automatically by follow procedure, at first behind blowdown butterfly valve 27 standard-sized sheets, electric reducer structure 1 could drive pin wheel 4, and to rotate its rotating speed at a slow speed be 0.2～0.4 rev/min, when fan-shaped collecting sewage room 31 overlaps with fan-shaped blowdown funnel 5, just form close access, the recirculated water after a part purifies will wash out from blowdown funnel 5 outlets the foreign material in the collecting sewage room 31 under circulating water pressure and the effect of atmospheric pressure difference one by one through blowdown butterfly valve 27.The preposition rectifier of this automatic backwash decontamination function can be controlled automatically according to the pressure reduction before and after the web-roll core and clean action, also can press timing automatic cleaning every day.

Claims (5)

1. preposition rectifier with automatic backwash decontamination function, the electric reducer structure (1) that it is characterized in that being contained in shell (2) middle part is a pin tooth engaged transmission with pin wheel (4), collect dirty frame (8), web-roll core (3) and pressure frame (10) order are positioned between 4 spokes (28), collect dirty frame (8) and press frame (10) to use bolt to be connected respectively with spoke (28), closed type rolling bearing chamber (15) is positioned at wheel hub (25), and connect with soket head cap screw, axle bed (11) is positioned at shell (2) lower central position, be connected with shell (2) with blowdown funnel (5) with supporting rib (7), main shaft (12) inserts in axle bed (11) hole, connect with soket head cap screw, the top edge of blowdown funnel (5) is equipped with elastic sealing element (6).

2. a kind of preposition rectifier with automatic backwash decontamination function according to claim 1 is characterized in that being positioned at collection dirty frame (8) and presses the middle fan-shaped web-roll core (3) of frame (10), is by the cross-coupled structure of two-layer streamlined stainless (steel) wire bar (30).

3. a kind of preposition rectifier with automatic backwash decontamination function according to claim 2 is characterized in that this web-roll core (30) is the groined type lattice structure that is combined into by streamlined net bar.

4. according to claim 1,2 or 3 described a kind of preposition rectifiers with automatic backwash decontamination function, it is characterized in that bearing chamber (15) is enclosed structure, the self-aligning thrust roller bearing that in bearing chamber (15), has two cover symmetries to install, be located on main shaft (12) by load dish (17) and two round nuts, outside framework oil seal and main shaft (12) sealing are arranged at the bottom of bearing chamber (15), and top has sealing gasket to be connected sealing with last cover (20) with bolt.

5. a kind of preposition rectifier with automatic backwash decontamination function according to claim 4 is characterized in that the transmission of pin tooth, and the rotating speed of rotation pin wheel (4) is 0.2～0.4 rev/min.

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