CN203989528U - Positive-pressure type descending lifeline - Google Patents
Positive-pressure type descending lifeline Download PDFInfo
- Publication number
- CN203989528U CN203989528U CN201420510364.XU CN201420510364U CN203989528U CN 203989528 U CN203989528 U CN 203989528U CN 201420510364 U CN201420510364 U CN 201420510364U CN 203989528 U CN203989528 U CN 203989528U
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- China
- Prior art keywords
- descending lifeline
- cylinder
- swiveling wheel
- housing
- slow
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Abstract
A positive-pressure type descending lifeline, mainly by descending lifeline housing, swiveling wheel, central shaft, cylinder, end cap, slow rope assembly falls and bolt forms.Be provided with in the circular hole that cylindrical swiveling wheel is arranged on descending lifeline housing, the circular hole of descending lifeline housing is provided with several arc grooves.During descending lifeline work, the slow moving swiveling wheel of rope band that falls rotates, and cylinder is in the arc groove of descending lifeline housing, and cylinder clashes into arc groove, and it is normal pressure that arc groove produces along the normal force of contact-making surface to cylinder.Cylinder is relayed to swiveling wheel by normal pressure, and swiveling wheel obtains the opposing torque contrary with its direction of rotation, thereby makes descending lifeline reach the slow object of falling of speed limit.Because normal pressure makes opposing torque that swiveling wheel obtains, be not subject to the impact of object coefficient of friction, so descending lifeline is not afraid of oil, not water funk.
Description
Technical field
The utility model is a kind of positive-pressure type descending lifeline, belongs to fire-extinguishing and lifesaving equipment.
Background technology
The fire disaster escaping descending lifeline of existing single use adopts friction mechanism to slow down more.This mechanism utilizes the mutual frictional resistance of movement parts to slow down, and frictional force can change because of the coefficient of friction of object, so poor stability.The descending lifeline of other structures also exists complex structure, manufacturing cost high, uses the defects such as inconvenience or security reliability be poor.
Summary of the invention
Technical problem to be solved in the utility model is: for the deficiencies in the prior art, provide a kind of positive-pressure type descending lifeline.
The technical scheme that the utility model adopts is: positive-pressure type descending lifeline by descending lifeline housing, swiveling wheel, central shaft, cylinder, end cap, slow rope assembly falls and bolt forms.Delay and fall becket bridle in the rotating shaft of swiveling wheel, slow one end that falls rope connects people or the object that must slow fall by jockey, and jockey can be hook or hook base etc.Several U-shaped grooves are evenly set on the circumference of swiveling wheel, a cylinder is set in each U-shaped groove.Central shaft is arranged in swiveling wheel, and swiveling wheel is arranged in the circular hole of descending lifeline housing, and several arc grooves are evenly set on the circumference of this circular hole.Slowly when the slow like this people who falls or object decline fall the moving swiveling wheel rotation of rope band, swiveling wheel drives cylinder to take central shaft and circles as the center of circle.Cylinder produces centrifugal force N, makes cylinder and the friction of descending lifeline housing, forms frictional resistance F.In cylinder moves to descending lifeline housing arc groove, cylinder clashes into a side of arc groove, and it is normal pressure P that arc groove produces along the normal force of contact-making surface to cylinder.A cylinder is only set in each U-shaped groove, and when a plurality of cylinder is set, cylinder is interfered mutually, makes the cylinder can not be all and the arc groove effective collision of descending lifeline housing, has reduced that descending lifeline is slow falls effect.Frictional resistance F and normal pressure P increase with cylindrical centrifugal force N.Square being directly proportional of the size of cylindrical centrifugal force N and cylindrical quality and its movement velocity.Frictional resistance F and normal pressure P produce opposing torque to the rotation of swiveling wheel.Along with the slow people who falls or the increase of object decrease speed, opposing torque increases simultaneously.When opposing torque equates with the torque of the slow people who falls or object generation, thereby the people of decline or object decrease speed no longer accelerate to reach the slow object of falling of constant speed.
The cylinder of positive-pressure type descending lifeline can rotate and be mobile in the U-shaped groove of swiveling wheel, and the width of U-shaped groove is greater than cylindrical diameter.
The cylindrical radius of positive-pressure type descending lifeline is less than the radius of descending lifeline housing arc groove, otherwise cylinder can not contact arc groove bottom, groove is reduced to cylindrical active force.The degree of depth of descending lifeline housing arc groove is less than cylindrical radius in addition, on the contrary cylinder in the effect of swiveling wheel and descending lifeline housing arc groove, issue and be conigenous lock, cause descending lifeline stuck.
Because the cylinder of positive-pressure type descending lifeline is in the arc groove of descending lifeline housing, the opposing torque that the opposing torque that groove produces cylindrical normal pressure P produces much larger than cylinder and descending lifeline housing circular-hole internal-wall frictional force F.When the groove of descending lifeline housing equates with cylinder quantity, cylinder will arrive arc groove simultaneously and leave arc groove simultaneously, little when large while causing opposing torque, make the descending lifeline can not smooth working, so the groove quantity of descending lifeline housing should be more than cylindrical quantity, and both greatest common divisors are less than 5.
Accompanying drawing explanation
Fig. 1 and Fig. 2 are the utility model one preferred embodiment structure cutaway views.
The specific embodiment
Referring to Fig. 1 and Fig. 2, it is the better enforcement structure of the utility model one cutaway view, this positive-pressure type descending lifeline by descending lifeline housing 1, swiveling wheel 2, central shaft 3, cylinder 4, end cap 5, slow rope assembly 6 falls and bolt 7 forms, the slow rope 6 that falls is looped around in the rotating shaft of swiveling wheel 2, and slow one end that falls rope 6 connects people or the object that must slow fall.13 U-shaped grooves 8 are evenly set on the circumference of swiveling wheel 2, a cylinder 4 is set in each U-shaped groove, central shaft 3 is arranged in swiveling wheel 2, and swiveling wheel 2 is arranged in the circular hole of descending lifeline housing 1, and 16 arc grooves 9 are evenly set on the circumference of this circular hole.
Claims (4)
1. a positive-pressure type descending lifeline is by descending lifeline housing (1), swiveling wheel (2), central shaft (3), cylinder (4), end cap (5), slow rope assembly (6) and bolt (7) formation of falling, it is characterized in that: delay and fall becket bridle in the rotating shaft of swiveling wheel (2), slow one end that falls rope connects people or the object that must slow fall, several U-shaped grooves (8) are evenly set on the circumference of swiveling wheel (2), a cylinder (4) is set in each U-shaped groove, central shaft (3) is arranged in swiveling wheel (2), swiveling wheel (2) is arranged in the circular hole of descending lifeline housing (1), several arc grooves (9) are evenly set on the circumference of this circular hole.
2. positive-pressure type descending lifeline is characterized in that as claimed in claim 1: its width of U-shaped groove (8) on swiveling wheel (2) circumference is greater than the diameter of cylinder (4).
3. positive-pressure type descending lifeline is characterized in that as claimed in claim 1: the radius of cylinder (4) is less than the radius of descending lifeline housing (1) arc groove (9), and the degree of depth of arc groove (9) is less than the radius of cylinder (4).
4. positive-pressure type descending lifeline is characterized in that as claimed in claim 1: the quantity of the arc groove (9) of descending lifeline housing (1) is more than the quantity of cylinder (4), and both greatest common divisors are less than 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510364.XU CN203989528U (en) | 2014-09-05 | 2014-09-05 | Positive-pressure type descending lifeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510364.XU CN203989528U (en) | 2014-09-05 | 2014-09-05 | Positive-pressure type descending lifeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203989528U true CN203989528U (en) | 2014-12-10 |
Family
ID=52029607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420510364.XU Active CN203989528U (en) | 2014-09-05 | 2014-09-05 | Positive-pressure type descending lifeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203989528U (en) |
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2014
- 2014-09-05 CN CN201420510364.XU patent/CN203989528U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |