CN2598618Y - Positive pressure reverse flushing fitering net device - Google Patents

Abstract

The utility model discloses a positive pressure reverse flushing fitering net device used together with vapor condensation equipment, wherein, a mesh board is arranged inside a casing; the center of the lower part of the mesh board is provided with a core tube having the sidewall connected with a sewage discharge bucket; the external end of a sewage discharge tube communicated with the lower nozzle of the core tube extends out of the casing; the subface of the sewage discharge bucket is connected with a big annular gear through a stiffened plate and the sewage discharge bucket; a small annular gear engaged with the big annular gear is connected with the decelerator fixed outside the casing; the vertical axis at the upper part of the core tube is fixed inside the center hole pipe of the mesh board through a support-locating device. The device realizes drive of the sewage discharge bucket through level engagement transmission of the small and big annular gears, thereby possessing reasonable drive mode; meanwhile, it has simple structure, reliable operation, less maintenance workload and much longer effective cycle of operation.

Description

Malleation backwash filter net device

Technical field

The utility model relates to a kind of filter, specifically a kind of malleation backwash filter net device.

Background technology

Condenser is the installation for steam condensation that is used on firepower (nuclear) the power plant Steam Turbine, and it is most important for operating efficiency that improves Steam Turbine and reduction coal consumption etc.In other industry, the cooler of similar structures also is widely used.There is a large amount of copper pipes condenser inside, and how this prevents that for using the thermal power plant of carrying out cooling heat transferring such as water resources such as rivers,lakes and seas impurity stops up copper pipe in the sealing, is key one ring that guarantees the condenser operate as normal.In some power plants, use at present a kind of malleation backwash filter net device from German import is arranged, this device is that web plate is housed in housing, the center of web plate bottom is provided with the core pipe, be connected with blowdown funnel at core pipe sidewall, the outer housing that stretches out of the blow-off pipe that is connected with mouth at the bottom of the core pipe has vertical shaft on core pipe top, and axle head is equipped with bevel gear, the bevel gear of installing with a transverse axis end in stretching into housing is meshed, and the outer reductor of the other end of transverse axis and housing joins.When reductor rotates under driven by motor, by the bevel gear transmission of transverse axis end, the core pipe is rotated, the drive blowdown funnel is pressed close to the web plate bottom surface and is made slow circular motion below web plate.Because cooling water is that impurity is blocked on the web plate bottom surface in the water from lower housing portion (or forward) the positive flow mistake that makes progress.When the forward current of blowdown funnel on a certain zone of instantaneous blocking-up web plate, because blowdown funnel communicates with ambient atmosphere by core pipe, blow-off pipe, so the upper pressure of this instantaneous web plate barrier region is greater than the bottom, thereby the part ascending current is backwashed, to oppositely backwash in blowdown funnel attached to the impurity of this bottom surface, web plate zone, discharge through core pipe and blow-off pipe again, realized the automatic pollution discharge of filter net device thus, thereby guarantee the long-term efficient operation of filter net device.But this device in actual use, because the filter net device diameter is bigger, it is very big to drive the required moment of transverse axis that blowdown funnel rotates, so that the tooth on the bevel gear often is sheared because of resistance is excessive is disconnected, causes filter net device normally not move.Like this, both strengthen the maintenance load of equipment, influenced normal generating production again.In addition, the positioning supports of transverse axis and core pipe and vertical shaft thereof at least need be with four bearings.Which shaft end seal spare lost efficacy, and it is stuck that the bearing water inlet is got rusty, and filter net device can't be remained in operation.

Summary of the invention

The purpose of this utility model just provides the rationally effective and very low malleation backwash filter net device of fault rate of a kind of kind of drive, to overcome the deficiency of existing apparatus, ensures the normal operation of cooling system.

The utility model is achieved in that malleation backwash filter net device is that web plate is housed in housing, the center of web plate bottom is provided with the core pipe, be connected with blowdown funnel at core pipe sidewall, housing is stretched out in the outer end of the blow-off pipe that is connected with mouth at the bottom of the core pipe, be connected with bull gear at blowdown funnel underrun gusset and blowdown funnel, be connected with the reductor that is fixed on hull outside with the bull gear pinion in mesh, the vertical shaft on core pipe top is fixed in the centre bore pipe of web plate by supporting and positioning device.This device with the kind of drive of face gear engagement, is realized the driving to blowdown funnel by installing a pinion and bull gear additional, has both saved transverse axis and bevel gear thus, makes the kind of drive more reasonable again.This is because the driving force brachium of bull gear does not rotate so pinion does not need very big power can drive bull gear.Avoided the tooth on gear and the gear ring to be sheared disconnected phenomenon generation like this, on the one hand effectively; Also reduce driving power on the other hand significantly, reduced the operating cost of filter net device thus.Again because saved transverse axis, correspondingly reduced the support keeper simultaneously, the operational reliability of device is increased.This apparatus structure is simple, and is reliable, and maintenance workload is little, and effectively the cycle of operation prolongs greatly.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the vertical view of web plate.

Fig. 3 is the cross sectional plan view that blowdown funnel combines with bull gear.

Specific implementation

As shown in Figure 1, the housing 2 of this device is the drum organization that is become by welded steel plate, is welded with adpting flange 1,14 at upper and lower port.Be fixed with web plate 4 in the housing, web plate 4 tapered bodies, its structure (as shown in Figure 2) is to enclose outside to be connected with 8-14 root gusset 4b between location-plate 4a and the centre bore pipe, lays filter screen between gusset.Core pipe 13 is positioned at the housing center of web plate 4 bottoms, its sidewall welding blowdown funnel 5.The version of the two and original device basic identical.Sidewall opening on the core pipe 13 is positioned at blowdown funnel, and its welded top has vertical shaft, supports the location by the supporting and positioning device in the web plate 4 centre bore pipes 3.Supporting and positioning device 3 can adopt support keepers such as bearing.Be connected with horizontally disposed bull gear 7 in blowdown funnel 5 bottom surfaces, between the interior edge of bull gear 7 and core pipe 13, also be welded with three gussets 15 (shown in Figure 3), so that gear wheel 7 and core pipe 13 are linked together securely.Be provided with intermeshing pinion 8 at the edge of gear wheel 7, be positioned at the evagination part of the corresponding position of housing 2.Be fixed with reductor 6 on this evagination part, pinion 8 and reductor 6 join by rotating shaft.In housing 2 bottoms a L shaped blow-off pipe 11 is arranged, its end opening with core pipe 13 suitable for reading communicates, and its lateral port stretches out housing 2, leads to outside communicating pipe.The crosspiece of blow-off pipe 11 is provided with blowdown control valve 12.

For guaranteeing that core pipe 13 can have a reliable and stable support, be provided with supporting and positioning device 10 in the junction of core pipe 13 and blow-off pipe 11, bracing frame 9 is connected between supporting and positioning device 10 and housing 2 inwalls.This supporting and positioning device 10 can adopt bearing or axle sleeve etc. to support keeper, by bracing frame 9, makes supporting and positioning device 10 support core pipe 13 reliably.

Claims (2)

1, a kind of malleation backwash filter net device, web plate (4) is housed in housing (2), the center of web plate bottom is provided with core pipe (13), be connected with blowdown funnel (5) at core pipe sidewall, housing (2) is stretched out in the outer end of the blow-off pipe (11) that is connected with mouth at the bottom of the core pipe, it is characterized in that being connected with bull gear (7) at blowdown funnel (5) underrun gusset (15) and blowdown funnel (5), be connected with the reductor that is fixed on hull outside (6) with bull gear pinion in mesh (8), the vertical shaft on core pipe (13) top is fixed in the centre bore pipe of web plate (4) by supporting and positioning device (2).

2, malleation backwash filter net device according to claim 1 is characterized in that being provided with supporting and positioning device (10) in core pipe (13) and blow-off pipe (11) junction, and bracing frame (9) is connected between supporting and positioning device (10) and housing (2) inwall.

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