CN219791389U - Bucket elevator drive chain tensioning mechanism with chain-off early warning function - Google Patents
Bucket elevator drive chain tensioning mechanism with chain-off early warning function Download PDFInfo
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- CN219791389U CN219791389U CN202321186582.8U CN202321186582U CN219791389U CN 219791389 U CN219791389 U CN 219791389U CN 202321186582 U CN202321186582 U CN 202321186582U CN 219791389 U CN219791389 U CN 219791389U
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- bucket elevator
- chain
- spring
- guide
- cylinders
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- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims description 19
- 238000007906 compression Methods 0.000 claims description 19
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 19
- 239000010883 coal ash Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Abstract
The utility model belongs to the technical field of power plant maintenance, and solves the problem of chain disengagement caused by ash accumulation of a bucket elevator; the elastic pressing mechanism comprises two supporting bases, an upper transverse plate, two spring lower limit cylinders, two spring upper limit cylinders, two tensioning pressure springs, two jacking screws, two locking nuts and a guide rod; the elastic pressing mechanism is pressed on the upper end of the side mounting plate for the transmission shaft at the tension end of the transmission chain through two tension springs; the stop trigger rod is a vertically arranged long rod, and the lower end of the stop trigger rod is fixedly connected with the upper end of the transmission shaft side mounting plate at the tensioning end of the transmission chain; the travel switch is fixedly arranged on the outer side wall of the shell of the bucket elevator in a manner that the contact is downward, and the contact of the travel switch is vertically aligned with the upper end of the stop trigger rod. The mechanism can improve the running stability of the bucket elevator and effectively avoid chain dropping of the transmission chain.
Description
Technical Field
The utility model belongs to the technical field of power plant equipment, relates to a bucket body machine for lifting and conveying coal ash generated by coal combustion, and relates to a bucket body machine transmission chain tensioning mechanism with a chain-off early warning function.
Background
In the production and operation process of the power plant, coal ash generated by coal combustion needs to be lifted and conveyed to an inlet at the top of the slag bin through a bucket elevator. The bucket elevator mainly comprises an outer shell, a vertically reciprocating conveying chain and a circle of ash receiving bucket fixedly arranged on the conveying chain. And an ash inlet is formed in the outer side part of the shell, which is close to the lower end, after being welded, the ash is conveyed into an ash receiving hopper in the shell, the ash receiving hopper carries the coal ash to go upwards under the action of a transmission chain, and after the coal ash is moved to the uppermost position, the coal ash is discharged. The fixed end of the current conveying chain is an upper end, and the lower end is a tensioning end. Specifically, the transmission shaft both ends that are located the tight end that rises pass through the side mounting panel of bearing installation outside the casing, and the both sides of side mounting panel cooperate with the vertical guide way of fixing on the casing lateral wall. The outer side of the side mounting plate is provided with a tensioning action arm, one end of the tensioning action arm is hinged to the cross joint seat outside the shell, the other end of the tensioning action arm is hung with a weight, the middle of the tensioning action arm acts on the overhanging part fixed on the outer side of the mounting plate, and therefore tensioning of the lower end of the transmission chain is achieved through the isomorphic weight.
The existing tensioning mode through the weight is that the weight is fixed, and in the running process of a transmission chain, the tensioning force cannot be adaptively adjusted along with the change of the ash quantity in the ash receiving hopper. Under the condition that the weight is small, the tension force is insufficient, under the condition that the transmission chain is in light load operation (the ash amount in the ash receiving hopper is small), the problem of chain disengagement easily occurs, while under the condition that the weight is large, the tension force is overlarge, under the condition that the transmission chain is in heavy load operation (the ash amount in the ash receiving hopper is large), the tension force of the transmission chain is large, and the problem of abrasion of the transmission chain easily occurs, so that the operation stability of the hopper lifting body is influenced.
In addition, in the process of carrying out ash lifting operation, a small amount of coal ash drops back to the lower part in the shell, and when the amount of the dropped coal ash is accumulated to a certain degree, the ash can act on the ash receiving hopper running to the lowest part, so that the ash receiving hopper below is supported. When the bucket lifting body is lifted to a certain extent, the chain can be disconnected, the normal operation of the bucket lifting body is affected, and certain potential safety hazards exist.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides the bucket elevator transmission chain tensioning mechanism with the chain-falling monitoring function, which can improve the running stability of the bucket elevator and effectively avoid chain-falling of a transmission chain.
The above object of the present utility model is achieved by the following technical solutions:
bucket elevator drive chain tensioning mechanism with take-off early warning function, its characterized in that: comprises an elastic pressing mechanism, a stop trigger rod and a travel switch;
the elastic pressing mechanism comprises two supporting bases, an upper transverse plate, two spring lower limit cylinders, two spring upper limit cylinders, two tension compression springs, two pressing screws, two locking nuts and a guide rod;
the two support bases are fixedly arranged at the outer sides of the upper ends of the side mounting plates for the transmission shafts at the tensioning ends of the transmission chains along the left and right directions; the upper transverse plate is fixedly arranged on the outer side wall of the shell of the bucket elevator and is positioned right above the two supporting bases, and the lower end of the upper transverse plate is vertically and fixedly provided with a left guide rod and a right guide rod; the two elastic lower limit sleeves are respectively and fixedly arranged at the upper ends of the two support bases, the two upper limit cylinders of the springs are respectively and rightly arranged right above the two elastic lower limit sleeves, a plurality of guide through holes are respectively formed in the upper limit cylinders of the springs, and the guide through holes are respectively matched with two groups of guide rods below the upper transverse plate along the up-down direction; the lower ends of the two tensioning compression springs are respectively in limit fit with the two spring lower limit cylinders, and the upper ends of the two tensioning compression springs are respectively in limit fit with the two spring upper limit cylinders; the upper transverse plate is provided with a left threaded through hole and a right threaded through hole, the left threaded through hole and the right threaded through hole are respectively connected with a jacking screw rod, and the lower ends of the two jacking screw rods are respectively in jacking contact with the middle parts of the upper ends of the two upper spring limiting cylinders; two jacking screws are positioned above the upper transverse plate and are respectively connected with a locking nut;
the stop trigger rod is a vertically arranged long rod, and the lower end of the stop trigger rod is fixedly connected with the upper end of the transmission shaft side mounting plate at the tensioning end of the transmission chain; the travel switch is fixedly arranged on the outer side wall of the shell of the bucket elevator in a manner that the contact is downward, and the contact of the travel switch is vertically aligned with the upper end of the stop trigger rod.
The two lower spring limiting cylinders are of a cylinder structure with flanges at the lower ends, and are fixedly arranged at the upper ends of the two support bases through screws; the lower ends of the two tensioning pressure springs are respectively inserted and positioned in the inner holes of the two lower spring limiting cylinders.
The two upper limit cylinders of the spring are of a cylinder structure, the inside of the cylinder structure is provided with a central column, the outside of the central column is provided with a flange, and the outer diameter of the central column is consistent with the inner diameter of the expansion compression spring; the two upper spring limiting cylinders are respectively in insertion fit with the upper ends of the two tension compression springs through a central column; the inner hole diameter of the two upper spring limiting barrels is larger than the outer diameter of the sleeve body part of the corresponding lower spring limiting sleeve; the guide through hole is arranged on the upper end flange of the upper limit cylinder of the spring.
And at least one group of guide members are fixed on the outer side wall of the shell of the bucket elevator, and guide holes or guide grooves for the stop guide rods to pass through are formed in the guide members.
And a plurality of warning marks arranged along the up-down direction are marked on one side of the outer side wall of the shell of the bucket elevator, which is positioned at the upper end part of the stop trigger rod.
The utility model has the advantages and positive effects that:
1. the tension mechanism of the transmission chain of the bucket elevator adopts the elastic compression mechanism, the acting force of the elastic compression mechanism on the tension end of the transmission chain can be adaptively adjusted along with the ash amount in the ash bucket, and compared with the existing mode of suspending and fixing the gravity weight, the tension mechanism can greatly improve the running stability of the transmission chain.
2. According to the utility model, the stop trigger rod is additionally arranged at the upper end of the side mounting plate for the transmission shaft at the tension end of the transmission chain, the travel switch is correspondingly arranged above the stop trigger rod, and when the falling coal ash in the bucket elevator is accumulated to a certain height, the upper end of the stop trigger rod is contacted with the trigger switch, so that the signal monitoring of the chain-falling danger is realized, and the monitored signal is used for realizing the stop control of the bucket elevator through the electric control system of the bucket elevator, thereby avoiding the chain-falling.
Drawings
FIG. 1 is a reference view of the present utility model with the bucket elevator in a safe operating condition;
FIG. 2 is a reference view of the present utility model with the bucket elevator in a shutdown-triggered condition;
fig. 3 is a partial schematic view of the elastic pressing mechanism of the present utility model.
Detailed Description
The structure of the present utility model will be further described by way of examples with reference to the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive.
Referring to fig. 1-3, the utility model relates to a bucket elevator transmission chain tensioning mechanism with a chain-disengaging early warning function, which comprises the following steps: mainly comprises an elastic pressing mechanism, a stop trigger rod 13 and a travel switch 11.
The elastic pressing mechanism is used for applying downward elastic pressing force to a side mounting plate 2 for a transmission shaft of a tension end of a transmission chain and mainly comprises two supporting bases 3, an upper transverse plate 8, two spring lower limit cylinders 4, two spring upper limit cylinders 6, two tension compression springs 5, two jacking screw rods 10, two locking nuts 9 and a plurality of guide rods 7.
The two support bases are fixedly connected with the outer sides of the upper ends of the side mounting plates in a welding or screw connection mode. The two support bases can adopt a right-angle bent plate structure provided with triangular welding rib plates. The two support bases are arranged at equal heights left and right.
The two spring lower limiting cylinders are of barrel structures with flanges arranged at the lower ends, and are fixedly arranged at the upper ends of the two support bases respectively in a screw connection mode. The inner holes of the two lower spring limiting cylinders are respectively used for limiting the lower ends of the two tension compression springs.
The lower ends of the two tensioning pressure springs are respectively inserted and positioned in the inner holes of the two lower spring limiting cylinders.
The two upper limit cylinders are internally provided with a central column, and the upper ends of the outer parts of the two upper limit cylinders are provided with flanges. The outer diameter of the central column 6.1 is identical to the inner diameter of the tensioning pressure spring. The two upper spring limiting cylinders are respectively assembled with the upper ends of the two tension springs through the central column in an inserting way, so that the upper ends of the tension compression springs are limited through the central column. The inner hole diameter of the two upper spring limiting barrels is slightly larger than the outer diameter of the sleeve body part of the corresponding lower spring limiting sleeve. A plurality of guide through holes are arranged on the flanges at the upper ends of the two upper limit cylinders.
The upper transverse plate is fixedly arranged on the outer side of the shell 1 of the bucket elevator in the transverse direction in a welding, screw connection and other modes and is positioned above the two upper spring limiting cylinders. The lower end of the upper transverse plate is respectively and vertically fixed with a left group of guide rods and a right group of guide rods. The guide rod at the left part and the guide through hole on the upper limit cylinder of the spring at the left side form one-to-one penetrating guide fit. The guide rod at the right part and the guide through holes on the upper limit cylinder of the spring positioned at the right side form one-to-one penetrating guide fit, so that the upper limit cylinder of the spring is guided and positioned, and the relative displacement along the horizontal direction can not occur at the two ends of the compression spring in the compression or extension process of the tension compression spring.
The upper transverse plate is provided with a left threaded through hole and a right threaded through hole, the left threaded through hole and the right threaded through hole are respectively connected with a jacking screw rod, and the lower ends of the two jacking screw rods are respectively in jacking contact with the middle parts of the upper ends of the two upper spring limiting cylinders. Two jacking screws are respectively connected with a lock nut above the upper transverse plate. The upper ends of the two jacking screws are screw adjusting action ends 10.1, and structures such as tetragonal, hexagonal and the like which are convenient for spanner to match and clamp can be adopted.
The stop trigger rod is a vertically arranged long rod, and the lower end of the stop trigger rod and the upper end of the transmission shaft side mounting plate at the tension end of the transmission chain form fixed connection in other modes such as welding, inserting and fastening. Further, at least one group of guide members 12 are fixed on the outer side wall of the casing of the bucket elevator, and guide holes or guide grooves for the stop guide rods to pass through are formed in the guide members, so that the stability and reliability of the installation and up-and-down movement of the stop trigger rods are further ensured.
The travel switch is fixedly arranged on the outer side wall of the shell of the bucket elevator in a manner that the contact is downward, and the contact of the travel switch is vertically aligned with the upper end of the stop trigger rod.
Further, a plurality of warning marks arranged along the up-down direction are marked on one side of the outer side wall of the shell of the bucket elevator, which is positioned at the upper end part of the stop trigger rod, so as to play a role in on-site warning. When the upper end of the stop trigger rod is positioned below or level with the lowest warning mark line, the normal running state of the conveying chain is indicated, and the safety can be marked; when the upper end of the stop trigger rod exceeds the warning marking at the lowest part, the transmission chain is indicated to enter a chain-off risk state, and the chain-off risk is larger along with the fact that the distance of the upper end of the machine trigger rod is better, when the upper end of the stop trigger rod moves to the position of the warning line at the highest part, the stop trigger rod can be contacted with a contact of a travel switch, the travel switch sends a signal to an electric control system of the bucket elevator, the electric control system controls a driving motor of the transmission chain to stop moving, the chain-off is avoided, coal ash falling from the lower part in a shell is cleaned in time, and the normal working state of the bucket elevator is recovered.
The working principle of the bucket elevator transmission chain tensioning mechanism with the chain-off monitoring function is that:
the utility model uses a plurality of high-strength expansion compression springs to press down and tighten the tension end of the transmission chain, and can adjust the tension force of the transmission chain by adjusting the jacking screw rod, thereby having the advantage of convenient adjustment. When the bucket elevator is in an operating state, under the action of gravity, the tensioning end of the transmission chain moves downwards under the action of gravity, so that the transmission chain tends to be tensioned, and the tensioning springs are stretched at the moment, so that the tensioning force on the transmission chain is reduced, and the tensioning force on the transmission chain is prevented from being overlarge due to the action of the tensioning springs; when the coal ash in the ash bucket is reduced, the tensioning end of the transmission chain has a trend of upward movement along with the operation of the transmission chain, and the tensioning springs are compressed at the moment, so that the tensioning force on the transmission chain can be increased, the tensioning end of the transmission chain is prevented from ascending, and the tensioning stability of the transmission chain is ensured.
When the amount of the falling coal ash at the lower end in the shell is gradually increased, the acting force of the tensioning pressure spring is also increased along with the upward movement of the ash bucket position moving to the lower end, and the increased acting force makes the transmission chain tensioned as much as possible, so that the continuous acting time of the bucket elevator is facilitated to be delayed.
Although the embodiments of the present utility model and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the utility model and the appended claims, and therefore the scope of the utility model is not limited to the embodiments and the disclosure of the drawings.
Claims (5)
1. Bucket elevator drive chain tensioning mechanism with take-off early warning function, its characterized in that: comprises an elastic pressing mechanism, a stop trigger rod and a travel switch;
the elastic pressing mechanism comprises two supporting bases, an upper transverse plate, two spring lower limit cylinders, two spring upper limit cylinders, two tension compression springs, two pressing screws, two locking nuts and a guide rod;
the two support bases are fixedly arranged at the outer sides of the upper ends of the side mounting plates for the transmission shafts at the tensioning ends of the transmission chains along the left and right directions; the upper transverse plate is fixedly arranged on the outer side wall of the shell of the bucket elevator and is positioned right above the two supporting bases, and the lower end of the upper transverse plate is vertically and fixedly provided with a left guide rod and a right guide rod; the two elastic lower limit sleeves are respectively and fixedly arranged at the upper ends of the two support bases, the two upper limit cylinders of the springs are respectively and rightly arranged right above the two elastic lower limit sleeves, a plurality of guide through holes are respectively formed in the upper limit cylinders of the springs, and the guide through holes are respectively matched with two groups of guide rods below the upper transverse plate along the up-down direction; the lower ends of the two tensioning compression springs are respectively in limit fit with the two spring lower limit cylinders, and the upper ends of the two tensioning compression springs are respectively in limit fit with the two spring upper limit cylinders; the upper transverse plate is provided with a left threaded through hole and a right threaded through hole, the left threaded through hole and the right threaded through hole are respectively connected with a jacking screw rod, and the lower ends of the two jacking screw rods are respectively in jacking contact with the middle parts of the upper ends of the two upper spring limiting cylinders; two jacking screws are positioned above the upper transverse plate and are respectively connected with a locking nut;
the stop trigger rod is a vertically arranged long rod, and the lower end of the stop trigger rod is fixedly connected with the upper end of the transmission shaft side mounting plate at the tensioning end of the transmission chain; the travel switch is fixedly arranged on the outer side wall of the shell of the bucket elevator in a manner that the contact is downward, and the contact of the travel switch is vertically aligned with the upper end of the stop trigger rod.
2. The bucket elevator drive chain tensioning mechanism with a chain-off early warning function of claim 1, wherein: the two lower spring limiting cylinders are of a cylinder structure with flanges at the lower ends, and are fixedly arranged at the upper ends of the two support bases through screws; the lower ends of the two tensioning pressure springs are respectively inserted and positioned in the inner holes of the two lower spring limiting cylinders.
3. The bucket elevator drive chain tensioning mechanism with a chain-off early warning function of claim 1, wherein: the two upper limit cylinders of the spring are of a cylinder structure, the inside of the cylinder structure is provided with a central column, the outside of the central column is provided with a flange, and the outer diameter of the central column is consistent with the inner diameter of the compression spring; the two upper spring limiting cylinders are respectively in insertion fit with the upper ends of the two tension compression springs through a central column; the inner hole diameter of the two upper spring limiting barrels is larger than the outer diameter of the sleeve body part of the corresponding lower spring limiting sleeve; the guide through hole is arranged on the upper end flange of the upper limit cylinder of the spring.
4. The bucket elevator drive chain tensioning mechanism with a chain-off early warning function of claim 1, wherein: at least one group of guide members are fixed on the outer side wall of the shell of the bucket elevator, and guide holes or guide grooves for the stop guide rods to pass through are formed in the guide members.
5. The bucket elevator drive chain tensioning mechanism with a chain-off early warning function of claim 1, wherein: one side of the outer side wall of the bucket elevator shell, which is positioned at the upper end part of the stop trigger rod, is marked with a plurality of warning marked lines which are arranged along the up-down direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321186582.8U CN219791389U (en) | 2023-05-17 | 2023-05-17 | Bucket elevator drive chain tensioning mechanism with chain-off early warning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321186582.8U CN219791389U (en) | 2023-05-17 | 2023-05-17 | Bucket elevator drive chain tensioning mechanism with chain-off early warning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219791389U true CN219791389U (en) | 2023-10-03 |
Family
ID=88186180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321186582.8U Active CN219791389U (en) | 2023-05-17 | 2023-05-17 | Bucket elevator drive chain tensioning mechanism with chain-off early warning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219791389U (en) |
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2023
- 2023-05-17 CN CN202321186582.8U patent/CN219791389U/en active Active
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