CN206081676U - Spray drying tower sweeps a tub slewer with overload protection function - Google Patents

Abstract

The utility model provides a spray drying tower sweeps a tub slewer with overload protection function, it includes motor, reducing gear box, driving gear, driven gear, goes up support bearings, lower support bearings and final drive shaft, and this slewer still includes a shearing pin and a current overload protector device, wherein, driven gear and final drive shaft only pass through shearing pin fixed connection, shearing pin is in including the welding last shank, welding on the final drive shaft outer wall are in the lower shank and the general at driven gear top go up the fastener that shank and lower shank fixed connection are in the same place, the current overload protector device is connected between motor and peripheral power supply. The utility model discloses a slewer has set up mechanical overload protection measure and electric overload protection measure simultaneously, can work by the automatic shutdown when overload, avoids the system to damage.

Description

Spray drying tower scavenging conduit slewing equipment with overload protection function

Technical field

This utility model is related to spray dryer field, more particularly to a kind of spray drying tower with overload protection function Scavenging conduit slewing equipment.

Background technology

Spray drying tower be for biological pesticide, medicine, food microorganisms drying equipment.When being dried, heat is empty Gas in the shape of a spiral evenly into drying tower, the nebulizer rotating spraying at the top of feed liquid Jing tower body into imperceptible powder body, then With hot-air current contacting, be dried within the extremely short time as finished product, finished product by drying tower outside the air-flow row that extracts of exhaust blower Go out bottom of towe.

As the powder body formed in drying tower is especially tiny, and some powder body have viscosity and electrostatic interaction, often Absorption produces powder body packing phenomenon in tower wall.In this regard, mainly which is purged using scavenging conduit at present, as shown in figure 1, should Scavenging conduit 2 is arranged along 1 tower wall bus of drying tower, is provided with slewing equipment 4 below and is driven which to make circumference fortune along 1 inwall of drying tower It is dynamic, so that the aperture that the pressure-air being passed through in its pipeline is opened up through on its tube wall is purged to powder body.

Existing slewing equipment as shown in figure 1, by motor 41, reduction box 42, driving gear 43, driven gear 44, upper The parts such as bearing 45, lower support bearing 46 and final drive shaft 47 composition is held, wherein, the airduct 5 of 47 bottom of final drive shaft and periphery Connection, driven gear 44 and final drive shaft 47 weld together.During work, motor 41 drives driving gear 43 by reduction box 42 Rotate, driving gear 43 drives driven gear 44 to rotate, driven gear 44 drives final drive shaft 47 to rotate, and final drive shaft 47 drives Scavenging conduit 2 above is rotated.

In large-sized drying machines, the length of scavenging conduit 2 is longer, often very high after erecting, as which is cantilever design, Only the 4 one points of supports of the slewing equipment in face are difficult to consolidate on the lower, thus walk wheel 3 as radial direction fulcrum in tower wall setting one, to share Pressure of the gravity of scavenging conduit 2 to tower wall.However, as powder body is densely covered in tower and has viscosity, often causing away wheel to run It is obstructed, so as to cause scavenging conduit 2 to produce very big moment of torsion, this can bear very big load for following slewing equipment 4, often System failure is caused, affects production to be normally carried out.

Utility model content

For above-mentioned the deficiencies in the prior art, this utility model provides a kind of spray drying tower with overload protection function Scavenging conduit slewing equipment, the slewing equipment can be automatically stopped work when load is excessive, it is to avoid system failure.

To achieve these goals, this utility model provides following technical scheme：

A kind of spray drying tower scavenging conduit slewing equipment with overload protection function, which includes motor, reduction box, active Gear, driven gear, upper bearing support, lower support bearing and final drive shaft, the slewing equipment also include a shear pin and Current overload protector, wherein,

The driven gear is only fixedly connected by the shear pin with final drive shaft, and the shear pin includes being welded on institute State the upper shank on final drive shaft outer wall, the lower shank being welded at the top of the driven gear and by the upper shank and under The securing member that shank is fixed together；

The current overload protector is connected between motor and peripheral power supply.

Preferably, the slewing equipment also includes the alarm being connected with the current overload protector.

The beneficial effects of the utility model are：

(1) this utility model is provided with shear pin, and when the torsion that final drive shaft bears is excessive, shear pin will be cut first It is disconnected, cause the connection between final drive shaft and driven gear to disconnect, other parts such that it is able to protect slewing equipment are not damaged It is bad.

(2) this utility model is provided with current overload protector, and such as in running, scavenging conduit is obstructed, the work of motor Electric current gradually will increase, once exceeding safe current, then cut off the electricity supply at once, it is ensured that Plant in good condition.

Description of the drawings

Structural representations of the Fig. 1 for prior art spray drying tower scavenging conduit slewing equipment；

Structural representations of the Fig. 2 for this utility model spray drying tower scavenging conduit slewing equipment；

Fig. 3 is the structural representation of shear pin in Fig. 2；

Circuit connection block diagrams of the Fig. 4 for this utility model spray drying tower scavenging conduit slewing equipment.

Specific embodiment

Below in conjunction with the accompanying drawings, preferred embodiment of the present utility model is given, and is described in detail, make to be better understood when Function of the present utility model, feature.

As shown in Fig. 21 scavenging conduit of spray drying tower of the present utility model, 2 slewing equipment 4 is equally including of the prior art Motor 41, reduction box 42, driving gear 43, driven gear 44, upper bearing support 45, lower support bearing 46 and final drive shaft 47.

Unlike the prior art, the driven gear 44 and final drive shaft 47 not weld together but by institute State shear pin 48 to be fixedly connected.Shear pin 48 as shown in Figures 2 and 3, including the upper pin being welded on 47 outer wall of the final drive shaft Body 481, the lower shank 482 being welded at the top of the driven gear 44, and the upper shank 481 and lower shank 482 are fixed The securing member 483 for linking together, on this, shank 481 and lower shank 482 are provided with the corresponding shear surface in position.Work as final drive shaft When 47 torsion for bearing are excessive, the shear surface of shear pin 48 will be cut off first, cause final drive shaft 47 and driven gear 44 it Between connection disconnect, other parts such that it is able to protect slewing equipment 4 are not damaged by.

In addition Fig. 4 is referred to, this utility model in addition to arranging above-mentioned mechanical protection measures is also additionally arranged electic protection and arranges Apply, specifically, this utility model is provided with current overload protector 49 between motor 41 and peripheral power supply 6, such as run During scavenging conduit 2 be obstructed, the operating current of motor 41 gradually will increase, once exceed safe current, then cut off the electricity supply at once 6, it is ensured that Plant in good condition.

In this embodiment, the current overload protector 49 is also associated with an alarm 40, works as overcurrent protection When device 49 detects the operating current of motor 41 more than safe current, alarm 40 is instructed to report to the police at once.

Above-described, preferred embodiment only of the present utility model is not limited to scope of the present utility model, this Above-described embodiment of utility model can also make a variety of changes.I.e. every claims according to this utility model application and Simple, equivalence changes and modification that description is made, fall within the claims of this utility model patent.

Claims (2)

1. a kind of spray drying tower scavenging conduit slewing equipment with overload protection function, which includes motor, reduction box, driving tooth Wheel, driven gear, upper bearing support, lower support bearing and final drive shaft, it is characterised in that the slewing equipment is also cut including one Pin and a current overload protector are cut, wherein,

The driven gear is only fixedly connected by the shear pin with final drive shaft, and the shear pin includes being welded on the master Upper shank, the lower shank being welded at the top of the driven gear on power transmission shaft outer wall and by the upper shank and lower shank The securing member being fixed together；

The current overload protector is connected between motor and peripheral power supply.

2. the spray drying tower scavenging conduit slewing equipment with overload protection function according to claim 1, its feature exist In the slewing equipment also includes the alarm being connected with the current overload protector.