CN201159632Y - Fan blade detection apparatus of cooling column - Google Patents
Fan blade detection apparatus of cooling column Download PDFInfo
- Publication number
- CN201159632Y CN201159632Y CNU2008200556065U CN200820055606U CN201159632Y CN 201159632 Y CN201159632 Y CN 201159632Y CN U2008200556065 U CNU2008200556065 U CN U2008200556065U CN 200820055606 U CN200820055606 U CN 200820055606U CN 201159632 Y CN201159632 Y CN 201159632Y
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- Prior art keywords
- fixed
- sleeve pipe
- blower fan
- unit
- cooling tower
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Abstract
The utility model discloses a detection device for detecting the vane of the draught fan of a cooling tower. The detection device, arranged inside the wind-sock of the draught fan and below the vane, comprises a pedestal, a locating assembly, a support assembly and a proximity switch. One end of the pedestal is fixed on the inner wall of the wind-sock. The locating assembly comprises a pair of fixed brackets which are respectively fixed on the pedestal. The support assembly comprises a sleeve and a support bracket; the sleeve is arranged between the two fixed bracket, with the bottom connected with the fixed brackets through pins; the support bracket is inserted into the sleeve and is fixed with the sleeve; a knighthead is fixed at the lower end of the support bracket and the proximity switch is fixed at the upper end of the support bracket. The detection device can not only detect the sag of the vane but also detect the rupture and falling of the vane through the proximity switch, and is simple and effective and can avoid damages to the whole equipment, thus reducing economic losses and improving efficiency.
Description
Technical field
The utility model relates to the blower fan of cooling tower checkout equipment, more particularly, relates to a kind of blower fan of cooling tower blade pick-up unit, and this pick-up unit can detect in real time to the sagging of fan blade.
Background technology
In fields such as smelting, chemical industry and generating, cooling tower is the most common heat-exchange apparatus, cooling tower commonly used comprises three kinds of cross-flow type, reverse-flow and mixed-flows, and these three kinds of cooling towers are all pumped air by the fan blade of rotation, thereby play cooling effect.Because fan blade is in comparatively rugged environment work down for a long time, is easy to wear out, be out of shape, thereby causes the distortion of blade tip natural torsion, produce sagging, fan operation cause blade tip to run into thereunder security guardrail and transmission shaft, in case can cause the transmission shaft distortion to damage; In addition, some materials are the blade of fiberglass, because this blade generally all adopts the compacting of epoxy resin and glass fabric to form, its weather resistance is relatively poor, service time is long slightly, be full of cracks just occurs on its windward side, when chapping to a certain degree, fracture just takes place and falls in blade easily, and in operational process, as long as a blade ruptures, remaining blade all can rupture, the blade that falls breaks air duct easily, cause the fracture of reducer casing housing when serious easily, make whole blower fan damage paralysis, brought unnecessary influence to production, sometimes fan blade also can be fallen chimney fan, and the staff at scene is brought potential safety hazard.
At present, blower fan of cooling tower checkout equipment commonly used is the vibration monitoring instrument, be arranged on the reductor of blower fan, by detecting vibration principle, can detect the quality of reducer casing processing, the consistance of each blade angle degree, the centering degree of the damaged condition of gear and bearing and shaft coupling, but, because the blower fan blade tip is sagging, only make fan blade position in vertical direction that variation has taken place, and the parameters such as angle of its windward side do not change, because the angle of windward side is constant, do not change (mainly being that lifting surface area does not change) so the projected area of blade on vertical plane also has, therefore, just be not affected and disturb the balance of whole blower fan, so just can not cause the vibration of blower fan to become big, thereby the vibration monitoring instrument can't detect the sagging of fan blade.In addition; when taking place to vibrate when fracture is fallen, blade becomes big; the vibration monitoring instrument can detect and send stop instruction; yet because electric chain reaction is slower; blower fan is received fault instruction back shutdown at least will be more than 0.1 second; and there is certain rotatory inertia in the blower fan of operation, can't stop at once, still is damaged easily.Therefore, can only regularly shut down at present, carry out the fan blade maintenance in the cooling tower by manually entering, yet blade be sagging and fracture all easily occurs in the operational process, artificial prophylactic repair can't tackle the problem at its root.
The utility model content
At exist in the prior art above-mentioned can't detect in real time the sagging of fan blade and the fracture, the shortcoming that easily causes the damage of equipment and have potential safety hazard, the purpose of this utility model provides a kind of blower fan of cooling tower blade pick-up unit, this pick-up unit can detect the sagging of fan blade in real time and fracture is fallen, and avoids entire equipment to damage.
For achieving the above object, the utility model adopts following technical scheme:
This blower fan of cooling tower blade pick-up unit is located in the air duct of blower fan, and is positioned at blade below, comprises base, positioning element, support component and near switch, base one end is fixed on the air duct inwall; Positioning element comprises a pair of fixed mount, is individually fixed on the base; Support component comprises sleeve pipe and bracing frame, and sleeve pipe is located between two fixed mounts, and bottom and fixed mount pin joint; The bracing frame lower end is fixedly connected with support bar, and support bar stretches in the sleeve pipe, and is connected and fixed with sleeve pipe; Be fixed at the bracing frame upper end near switch.
Be fixed with a spring base respectively on described two fixed mounts, being provided with spring, spring inboard in the spring base, to be provided with the location top, and with top the offseting in location, the spring outside also is provided with set screw, and offsets with set screw.
The both sides outer wall of described sleeve pipe is provided with positioning hole corresponding, and described location is top by pilot hole and the sleeve pipe location that offsets.
The external wall of upper portion of described sleeve pipe also has screw, is provided with gib screw in the screw, and sleeve pipe passes screw by gib screw and support bar holds out against fixing.
Go back horizontally set one carriage on described base one side, carriage one end and base are connected and fixed, and the upper surface of the other end is fixed with buffering stiffness spring sheet.
The both sides of described bracing frame are provided with yielding rubber layer and buffer spring sheetmetal.
One end of described carriage also is fixed with tablet.
In technique scheme, blower fan of cooling tower blade pick-up unit of the present utility model is located in the air duct of blower fan, and is positioned at blade below, comprises base, positioning element, support component and near switch, base one end is fixed on the air duct inwall; Positioning element comprises a pair of fixed mount, is individually fixed on the base; Support component comprises sleeve pipe and bracing frame, and sleeve pipe is located between two fixed mounts, bottom and fixed mount pin joint; The bracing frame lower end is fixedly connected with support bar, and support bar stretches in the sleeve pipe, and is connected and fixed with sleeve pipe; Be fixed at the bracing frame upper end near switch.By not only can detecting in real time, but also can fall detect to the fracture of fan blade to the sagging of fan blade near switch, effectively simple, avoided the damage of entire equipment, reduced economic loss, improved benefit.
Description of drawings
Fig. 1 is the structural representation of blower fan of cooling tower blade pick-up unit of the present utility model;
Fig. 2 is that the A of pick-up unit shown in Figure 1 is to synoptic diagram;
Fig. 3 is when blade falls, the rotation status synoptic diagram of the sleeve pipe of pick-up unit of the present utility model;
Fig. 4 is the circuit theory diagrams near the Application Example of switch of protective device of the present utility model.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
See also shown in Figure 1, blower fan of cooling tower blade pick-up unit 10 of the present utility model is located in the air duct 1 of blower fan of cooling tower, and be positioned at blade 2 belows, this pick-up unit 10 comprises base 11, positioning element, support component and near switch 12, base 11 1 ends adopt bolt 111, plain cushion, bullet pad and nut to be fixed on air duct 1 inwall; Positioning element comprises a pair of fixed mount 13, is symmetrical arranged, and fixed mount 13 bottoms all are fixedly welded on the base 11; Support component comprises sleeve pipe 14 and bracing frame 15, and sleeve pipe 14 is located between two fixed mounts 13, and sleeve pipe 14 bottoms are connected with fixed mount 13 bottoms by round pin 141, and sleeve pipe 14 can radially be rotated along round pin 141; Bracing frame 15 lower ends are fixedly connected with support bar 151, and support bar 151 stretches in the sleeve pipe 14, and are connected and fixed with sleeve pipe 14; Be fixed at bracing frame 15 upper ends near switch 12.Be fixed with a spring base respectively on two fixed mounts 13, being provided with spring 131, spring 131 inboards in the spring base, to be provided with the location top 132, and offset with location top 132, and spring 131 outsides also are provided with set screw 133, and offset with set screw 133.The both sides outer wall of sleeve pipe 14 is provided with and locatees top 132 positioning hole corresponding, makes the location top 132 of both sides head into pilot hole by rotation set screw 133, with sleeve pipe 14 location that offsets, thereby sleeve pipe 14 is kept upright.The external wall of upper portion of sleeve pipe 14 also has screw, be provided with gib screw 142 in the screw, sleeve pipe 14 passes screw by gib screw 142 and support bar 151 holds out against fixing, by the lifting of adjusting support bar 151 and fixing of gib screw 142, the lifting of adjustable support frame 15, thus can adjust on the bracing frame 15 near the distance between switch 12 and the blade 2.Please in conjunction with shown in Figure 2; also be horizontally arranged with a carriage 16 on base 11 1 sides; carriage 16 1 ends and base 11 are connected and fixed; the upper surface of carriage 16 other ends is provided with buffering stiffness spring sheet 161; and be connected and fixed by bolt 111, bullet pad and nut and carriage 16; and the both sides of bracing frame 15 are provided with yielding rubber layer 152 and buffer spring sheetmetal 153, all can play a protective role.One end of carriage 16 also is provided with tablet, tablet one end and carriage 16 are connected and fixed, the other end is curved upwards, when sleeve pipe 14 rotations fall behind down, can detect tablet near switch 12 on the bracing frame 15, promptly near the distance between switch 12 and the tablet in induction range near switch 12.
Need to prove at this; pick-up unit 10 of the present utility model be general part near switch 12; on market, can buy; adopting the model of Omron Corp below is being illustrated near switch 12 of E2K-F; please in conjunction with shown in Figure 4; owing to should be to have transistor output near switch 12; has certain on-load ability (maximum 100mA); therefore can adopt miniature intermediate relay (electric current＜100mA) as load; utilize the normally closed node strings of auxiliary reclay to connect in the electric control system of blower fan; thereby control shutdown, reach the effect of protection fan blade.Please again in conjunction with shown in Figure 3, during use, pass through the fixing of support bar 151 liftings and gib screw 142 earlier, to be adjusted into 12～15mm near the distance between switch 12 and the fan blade, and the backward distance near between the switch 12 is set to 5～6mm under tablet and the sleeve rotation, by detecting in real time near 12 pairs of fan blades of switch.When blade 2 when rotated; as long as it is sagging that wherein any a slice deforms, cause blade 2 and become closely, when this distance during smaller or equal to 10mm near distance between the switch 12; it is sagging to detect blade 2 near switch 12; send detection signal immediately, report to the police, cut off by the primary power of auxiliary reclay simultaneously blower fan; thereby make the blower fan hard stop; manually keep in repair again, thereby avoid causing device damage, reduce economic loss.Because the screw of fixed blade 2 is lax and blade 2 fractures; all can make blade 2 moments whereabouts; may also have little time send detection signal near switch 12 this moment; blade 2 is just hit down near switch 12; therefore pass through the yielding rubber layer 152 and the buffer spring sheetmetal 153 of setting; the blade 2 that causes to fall and break directly contacts with yielding rubber layer 152 and buffer spring sheetmetal 153; avoid being broken near switch 12; hinged by between sleeve pipe 14 and the fixed mount 13; and the Elastic Contact of locating top 132; when bracing frame 15 is subjected to the impulsive force of blade 2; sleeve pipe 14 moments rotation falls on the carriage 16; and by cushioning the effect that stiffness spring sheet 161 plays buffer protection; at this moment; tablet by being provided with makes near switch 12 and senses and send immediately detection signal, in time reports to the police and controls blower fan and shut down.Although the speed of sleeve pipe 14 moments whereabouts is fast; but can not broken by blade 2 near switch 12 yet; make warning and the shutdown of control blower fan in time, effectively; avoid rest blade 2 generation fractures and air duct 1 to be damaged; and prevented that blade 2 from falling chimney fan 1; stopped the generation of security incident, effect is remarkable.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (7)
1. blower fan of cooling tower blade pick-up unit, this pick-up unit is located in the air duct of blower fan, and is positioned at the blade below, it is characterized in that:
This pick-up unit comprises base, positioning element, support component and near switch,
Base one end is fixed on the air duct inwall;
Positioning element comprises a pair of fixed mount, is individually fixed on the base;
Support component comprises sleeve pipe and bracing frame, and sleeve pipe is located between two fixed mounts, and bottom and fixed mount pin joint; The bracing frame lower end is fixedly connected with support bar, and support bar stretches in the sleeve pipe, and is connected and fixed with sleeve pipe;
Be fixed at the bracing frame upper end near switch.
2. blower fan of cooling tower blade pick-up unit as claimed in claim 1 is characterized in that:
Be fixed with a spring base respectively on described two fixed mounts, being provided with spring, spring inboard in the spring base, to be provided with the location top, and with top the offseting in location, the spring outside also is provided with set screw, and offsets with set screw.
3. blower fan of cooling tower blade pick-up unit as claimed in claim 1 or 2 is characterized in that:
The both sides outer wall of described sleeve pipe is provided with positioning hole corresponding, and described location is top by pilot hole and the sleeve pipe location that offsets.
4. blower fan of cooling tower blade pick-up unit as claimed in claim 1 is characterized in that:
The external wall of upper portion of described sleeve pipe also has screw, is provided with gib screw in the screw, and sleeve pipe passes screw by gib screw and support bar holds out against fixing.
5. blower fan of cooling tower blade pick-up unit as claimed in claim 1 is characterized in that:
Go back horizontally set one carriage on described base one side, carriage one end and base are connected and fixed, and the upper surface of the other end is fixed with buffering stiffness spring sheet.
6. blower fan of cooling tower blade pick-up unit as claimed in claim 1 is characterized in that:
The both sides of described bracing frame are provided with yielding rubber layer and buffer spring sheetmetal.
7. blower fan of cooling tower blade pick-up unit as claimed in claim 5 is characterized in that:
One end of described carriage also is fixed with tablet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200556065U CN201159632Y (en) | 2008-02-21 | 2008-02-21 | Fan blade detection apparatus of cooling column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200556065U CN201159632Y (en) | 2008-02-21 | 2008-02-21 | Fan blade detection apparatus of cooling column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159632Y true CN201159632Y (en) | 2008-12-03 |
Family
ID=40110216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200556065U Expired - Fee Related CN201159632Y (en) | 2008-02-21 | 2008-02-21 | Fan blade detection apparatus of cooling column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201159632Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288206A (en) * | 2010-06-18 | 2011-12-21 | 沈阳中科天道新能源装备股份有限公司 | Wheel hub position detection method and realization device |
| CN102454589A (en) * | 2012-01-09 | 2012-05-16 | 天津科技大学 | Frequency conversion cooling tower fan running state monitoring and fault diagnosis remote monitor system |
-
2008
- 2008-02-21 CN CNU2008200556065U patent/CN201159632Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288206A (en) * | 2010-06-18 | 2011-12-21 | 沈阳中科天道新能源装备股份有限公司 | Wheel hub position detection method and realization device |
| CN102454589A (en) * | 2012-01-09 | 2012-05-16 | 天津科技大学 | Frequency conversion cooling tower fan running state monitoring and fault diagnosis remote monitor system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20160221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |