CN112629318A - Portable water rescue catapult and catapulting method thereof - Google Patents

Portable water rescue catapult and catapulting method thereof Download PDF

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Publication number
CN112629318A
CN112629318A CN202011579181.XA CN202011579181A CN112629318A CN 112629318 A CN112629318 A CN 112629318A CN 202011579181 A CN202011579181 A CN 202011579181A CN 112629318 A CN112629318 A CN 112629318A
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China
Prior art keywords
spring
life
sliding
lock rod
rod
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CN202011579181.XA
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Chinese (zh)
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CN112629318B (en
Inventor
张巨勇
沈亚文
尹爱国
许嘉钦
严琦森
方铁锋
刘若愚
李蓉
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/62—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C9/00—Life-saving in water
    • B63C9/22—Devices for holding or launching life-buoys, inflatable life-rafts, or other floatable life-saving equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C9/00—Life-saving in water
    • B63C9/26—Cast or life lines; Attachments thereto; Containers therefor; Rescue nets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/64—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot
    • F41B11/642—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot the piston being spring operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/80—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes

Abstract

The invention discloses a portable water rescue catapult and a catapult method thereof. The precision of the manual throwing lifesaving device is difficult to guarantee, the high-pressure gas is thrown, the carrying is inconvenient, and the manual throwing lifesaving device is not suitable for complex dangerous occasions. The sliding booster is triggered by a trigger mechanism to drive a compression spring and an extension spring; and the sliding booster can tension the spring leaf mechanism. Therefore, under the triple elasticity action of the elastic rope, the compression spring and the extension spring, the distance and the precision of the ejection life-saving device are equivalent to those of high-pressure gas throwing, but in the processes of carrying, operating and using and the like, the safety is better ensured, and the ejection life-saving device has a simple structure, is convenient to carry, has low manufacturing cost and is suitable for various complex and dangerous working conditions; the farthest horizontal distance which can be reached by the lifesaving bullet is marked in the finished product, the finished products with different specifications can be designed, and after a rescuer visually inspects the horizontal distance from the shore of a person falling into the water, a standing point can be selected according to the farthest horizontal distance which can be reached by the lifesaving bullet and the estimated distance between the standing point and the shore.

Description

Portable water rescue catapult and catapulting method thereof
Technical Field
The invention belongs to the field of water rescue equipment, and particularly relates to a portable water rescue catapult and a catapulting method thereof.
Background
When people fall into rivers, lakes or flood disasters carelessly, rescue needs to be carried out urgently because the people falling into the water and rescue personnel do not learn water or the water surface is complex, and when the rescue personnel cannot fall into the water under the safety consideration of the safety of the rescue personnel, the rescue personnel needs to throw the life saving device to the target place of the people falling into the water quickly and effectively on the road or a ship and help the people to return to the shore, which is one of important ways for carrying out the water surface rescue. However, most of the existing life saving devices are life rafts and life boats, are large in size, heavy, not easy to move and low in rescue efficiency, and cannot be applied to complex and dangerous occasions.
Currently, in real life, we often encounter this unfortunate situation: in a remote strange environment, people unfortunately fall into the water and the water falling point is far away from the bank, but no people can swim or the water is poor, life saving devices such as life jackets and life buoys are sent to the places of people who are in distress after falling into the water, and manual throwing is mainly adopted. However, the manual throwing distance is greatly limited, and the precision is difficult to guarantee, so that an ideal state cannot be achieved. Rescue equipment utilizing high-pressure gas to cast is available in the market at present, but the equipment is heavy, has great defects in carrying and using safety performance, and is expensive, so that the equipment is difficult to popularize well.
Therefore, at present, there is an urgent need for a water rescue catapult which is portable, safe and reliable to operate, low in cost and suitable for various complex dangerous occasions.
Disclosure of Invention
The invention provides a portable water rescue catapult and a catapult method thereof, aiming at the existing defects of water rescue equipment, the portable water rescue catapult utilizes mechanical elastic potential energy to catapult a rescue device to a drowning victim place for rescue, has simple structure, convenient carrying and use, can safely and quickly catapult a lifesaving device to the drowning victim place within a certain distance range, helps the lifesaving device to return to the shore, and can effectively implement rescue.
The technical scheme adopted by the invention is as follows:
the invention relates to a portable water rescue catapult which comprises a frame, a spring piece mechanism, a life-saving bomb, a compression spring, a trigger mechanism, a sliding booster, a V-shaped guide side plate, an extension spring, a guide rod and a hand bracket, wherein the spring piece mechanism is arranged on the frame; the hand bracket is fixed at the front end of the bottom of the frame; the sliding booster comprises a boosting rod, a roller and a guide block; the guide block and a guide rod fixed on the rack form a sliding pair, the front end of the sliding pair is connected with the rack through an extension spring, and the rear end of the sliding pair is connected with the rack through a compression spring; the front end of the guide block is provided with a groove; the outer side of the groove is provided with a raised line which is integrally formed; the compression spring is sleeved on the guide rod; two sides of the guide block are hinged with two rollers; the two rollers and the two guide slide rails fixed on the frame respectively form rolling friction; the bottom of the guide block is wedge-shaped, and the inclined plane is arranged backwards; the boosting rod is fixed on the top of the guide block. The spring piece mechanism comprises a fixed pulley, an elastic rope and a spring piece; the middle part of the spring piece is fixed at the front end of the frame, and two ends of the spring piece are respectively hinged with a fixed pulley; the annular elastic rope is sleeved on the two fixed pulleys and is fixed with the two ends of the spring piece. Two V-shaped guide side plates which are arranged at intervals are fixed at the top of the frame, and the life-saving bomb is arranged between the two V-shaped guide side plates; the life-saving bomb comprises a life-saving bomb shell and a life jacket assembly; the lifesaving cartridge case and the two V-shaped guide side plates form a sliding pair; the life jacket component comprises a life jacket, a high-pressure gas cylinder, a trigger switch and a rope; the air outlet of the high-pressure air bottle is communicated with the inner cavity of the life jacket, and a trigger switch is arranged at the air outlet of the high-pressure air bottle; one end of the rope is fixed with a trigger switch of the high-pressure gas cylinder, the other end of the rope is fixed with a boosting rod of the sliding booster, and the rope is wound on the boosting rod; the life jacket and the high-pressure gas cylinder are both arranged in the life-saving cartridge case.
The trigger mechanism comprises a lock rod, a fixing bolt, a spanner and a positioning pin; the middle part of the lock rod is hinged with the bottom of the frame through a positioning pin and is connected with the frame through a torsional spring sleeved on the positioning pin; the top end of the lock rod is hinged with a roller; a fixed bolt for limiting the top of the lock rod is fixed on one side, close to the spring piece mechanism, of the top of the lock rod of the frame; the middle part of the wrench is hinged with the bottom of the frame through a positioning pin, and the top of the wrench is contacted with the bottom of the locking rod; a fixing bolt for limiting the wrench is fixed on one side of the machine frame, which is close to the spring leaf spring mechanism and below the positioning pin in the middle of the wrench.
Preferably, the roller is axially positioned by a clamp spring.
Preferably, a fixing bolt for limiting the lock rod is fixed on one side of the bottom of the lock rod, which is close to the spring piece mechanism, of the machine frame.
Preferably, when the launching angle is theta, the horizontal distance for the life-saving bomb to launch is calculated as follows:
sum E of work done by extension spring and compression spring during ejection1Comprises the following steps:
Figure BDA0002864867290000021
wherein k is1Is the elastic coefficient of the tension spring, /)1Amount of deformation of the tension spring, k2To compress the spring constant of the spring, /)2Is the amount of deflection of the compression spring.
Sum of spring leaf and elastic rope acting E2The design is as follows:
E2＝0.7×E1 (2)
in the ejection process, the energy transfer efficiency is set to be 90%, and the ejection method is obtained according to the energy conservation principle:
Figure BDA0002864867290000031
wherein m is the mass of the life-saving bomb, and V is the initial speed of the life-saving bomb.
The combined type (1), (2) and (3) are as follows:
Figure BDA0002864867290000032
the time t required for reaching the highest point in the process of oblique projectile motion1Comprises the following steps:
t1＝Vsinθ/g
vertical distance h between the maximum height of the life-saving bomb and the initial position of the bomb1Comprises the following steps:
Figure BDA0002864867290000033
time t taken for falling from the highest point to the target position2Solving according to the following formula:
Figure BDA0002864867290000034
wherein h is2Popping the vertical distance between the initial position and the water surface for the life-saving bomb; then, the following steps are obtained:
Figure BDA0002864867290000035
thus, the farthest horizontal distance S that the life-saving bomb can reach is as follows:
Figure BDA0002864867290000036
the ejection method of the portable water rescue ejector comprises the following specific steps:
firstly, a rescuer visually inspects the horizontal distance between a person falling into water and the shore, and selects a standing point according to the farthest horizontal distance which can be reached by a lifesaving bomb and the estimated distance between the standing point and the shore; then, the rescue worker moves the sliding booster backwards along the guide rod, and the roller rolls on the guide slide rail, so that the compression spring is compressed, and the extension spring is extended; when the guide block of the sliding booster reaches the upper part of the trigger mechanism, the inclined plane at the bottom of the guide block presses the lock rod downwards, and the torsion spring stores energy; after the guide block passes over the lock rod, the lock rod resets under the action of the restoring force of the torsion spring and the limiting action of the fixing bolt at the top of the lock rod; the locking rod drives the top of the wrench to swing backwards, and the position of the wrench, which is close to the lower part of the middle positioning pin, is limited by the fixing bolt below the positioning pin; after the guide block crosses the lock rod, the rescue worker loosens the sliding booster, and the sliding booster pushes the top of the lock rod upwards under the restoring force action of the compression spring and the extension spring, but is limited by the top of the lock rod; and then the elastic rope is stretched and hung on the raised line outside the groove of the guide block, and at the moment, the elastic rope is in a stretching state.
Secondly, the trigger is pulled to align the position of the person falling into the water, so that the bottom of the trigger swings backwards, the top of the trigger drives the bottom of the lock rod to swing forwards, and the top of the lock rod swings backwards, so that the sliding booster is pushed to move backwards; when the lock rod passes over the sliding booster, the sliding booster is not restrained by the lock rod any more, so that the sliding booster moves forwards along the guide rod under the action of the restoring force of the elastic rope, the compression spring and the extension spring, and the life-saving bomb is launched out along the V-shaped guide side plate; when the life-saving bomb reaches the position near a person falling into the water, the rope connected with the boosting rod is tensioned, the rope turns on a trigger switch of the high-pressure gas cylinder, the high-pressure gas cylinder inflates the life jacket, and the life jacket filled with gas breaks through the life-saving bomb shell and floats to the side of the person falling into the water; then, the person falling into the water is remotely rescued under the synergistic action of the life jacket and the rope.
Compared with the prior art, the invention has the following beneficial effects:
1) compared with manual throwing, the distance and the precision of the ejection life-saving device are greatly improved, and the practicability and the effectiveness are enhanced.
2) Compared with high-pressure gas throwing, the invention has the advantages that under the triple elasticity action of the elastic rope, the compression spring and the extension spring, the distance and the precision of the ejection lifesaving device are equivalent to those of the high-pressure gas throwing.
3) Compared with life rafts and life boats, the invention has the advantages of small volume, good directivity, simplicity, convenience, safe and reliable operation and suitability for various complex and dangerous working conditions.
4) Compared with manual throwing and high-pressure gas throwing, the invention can mark the farthest horizontal distance which can be reached by the lifesaving bomb in the finished product, can design the finished products with different specifications, and can select the standing point according to the farthest horizontal distance which can be reached by the lifesaving bomb and the estimated distance between the standing point and the shore after the rescue worker visually inspects the horizontal distance between the person falling into water and the shore.
Drawings
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a partial schematic view of the present invention;
FIG. 3 is a perspective view of the spring plate mechanism of the present invention;
FIG. 4 is a perspective view of the construction of the life buoy of the present invention;
fig. 5 is a schematic view of the construction of a lifejacket assembly of the present invention;
FIG. 6 is a perspective view of the trigger mechanism of the present invention;
FIG. 7 is a perspective view of the sliding assist of the present invention;
FIG. 8 is a schematic view showing the deformation amounts of the compression spring and the extension spring in the present invention;
fig. 9 is a diagram showing an ejection track of the life buoy in the invention.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 and 2, a portable water rescue catapult comprises a frame 1, a spring piece mechanism 2, a life-saving bomb 3, a compression spring 4, a trigger mechanism 5, a sliding booster 6, a V-shaped guide side plate 8, an extension spring 9, a guide rod 10 and a hand bracket 11; the hand bracket 11 is fixed at the front end of the bottom of the frame 1; as shown in fig. 7, the sliding booster 6 includes a booster rod 6-1, a roller 6-2, and a guide block 6-3; the guide block 6-3 and a guide rod 10 fixed on the frame 1 form a sliding pair, the front end of the sliding pair is connected with the frame 1 through an extension spring 9, and the rear end of the sliding pair is connected with the frame 1 through a compression spring 4; the front end of the guide block 6-3 is provided with a groove; the outer side of the groove is provided with a raised line which is integrally formed; the compression spring 4 is sleeved on the guide rod 10; two sides of the guide block 6-3 are hinged with two rollers 6-2; the two rollers 6-2 and the two guide slide rails 7 fixed on the frame 1 respectively form rolling friction, so that the loss of elastic potential energy is reduced; the bottom of the guide block 6-3 is wedge-shaped, and the inclined plane is arranged backwards; the push-aid rod 6-1 is fixed on the top of the guide block 6-3. As shown in fig. 3, the spring piece mechanism 2 comprises a fixed pulley 2-1, an elastic rope 2-2 and a spring piece 2-3; the middle part of the spring piece 2-3 is fixed at the front end of the frame 1, and two ends of the spring piece are respectively hinged with a fixed pulley 2-1; the annular elastic rope 2-2 is sleeved on the two fixed pulleys 2-1 and fixed with the two ends of the spring piece 2-3. Two V-shaped guide side plates 8 arranged at intervals are fixed at the top of the frame 1, and the life-saving bomb 3 is arranged between the two V-shaped guide side plates 8; as shown in fig. 4, the life jacket 3 includes a life jacket case 3-1 and a life jacket assembly 3-2; the lifesaving cartridge case 3-1 and the two V-shaped guide side plates 8 form a sliding pair; as shown in fig. 5, the lifejacket assembly 3-2 comprises a lifejacket 3-2-1, a high pressure gas cylinder 3-2-2, a trigger switch 3-2-3 and a cord 3-2-4; the air outlet of the high-pressure air bottle 3-2-2 is communicated with the inner cavity of the life jacket 3-2-1, and a trigger switch 3-2-3 is arranged at the air outlet of the high-pressure air bottle 3-2-2; one end of the rope 3-2-4 is fixed with the trigger switch 3-2-3 of the high-pressure gas cylinder 3-2-2, the other end is fixed with the push-aid rod 6-1 of the sliding booster 6, and the rope 3-2-4 is wound on the push-aid rod 6-1; the life jacket 3-2-1 and the high-pressure gas cylinder 3-2-2 are both arranged in the life-saving cartridge case 3-1.
As shown in FIG. 6, the trigger mechanism 5 includes a lock lever 5-1, a fixing bolt 5-2, a wrench 5-3 and a positioning pin 5-4; the middle part of the lock rod 5-1 is hinged with the bottom of the frame 1 through a positioning pin 5-4 and is connected with the frame 1 through a torsion spring sleeved on the positioning pin 5-4; the top end of the lock rod 5-1 is hinged with a roller; a fixing bolt 5-2 is fixed on the frame 1 at one side of the top of the lock rod 5-1 close to the spring leaf spring mechanism 2, and the fixing bolt 5-2 limits the top of the lock rod 5-1; the middle part of the wrench 5-3 is hinged with the bottom of the frame 1 through a positioning pin 5-4, and the top part of the wrench 5-3 is contacted with the bottom of the lock rod 5-1; a fixing bolt 5-2 is fixed on the frame 1 below a positioning pin 5-4 in the middle of the wrench 5-3 and on one side close to the spring leaf spring mechanism 2, and the fixing bolt 5-2 limits the position below the positioning pin 5-4 in the middle of the wrench 5-3.
As a preferred embodiment, the roller 6-2 is axially positioned by a circlip 6-4.
As a preferred embodiment, the frame 1 is fixed with a fixing bolt 5-2 at the side of the bottom of the lock rod 5-1 close to the spring leaf spring mechanism 2, and the fixing bolt 5-2 limits the bottom of the lock rod 5-1.
When the launch angle is θ (the included angle between the frame 1 and the horizontal plane, and θ is 45 ° in this embodiment), the horizontal distance for launching the life-saving bomb is calculated as follows:
sum E of work done by extension spring and compression spring during ejection1Comprises the following steps:
Figure BDA0002864867290000061
wherein the elastic coefficient k of the extension spring11.786N/mm, amount of deformation l of the tension spring1150mm, coefficient of elasticity k of compression spring22.7N/mm, amount of deformation l of compression spring2120mm as shown in figure 8.
Sum of spring leaf and elastic rope acting E2The design is as follows:
E2＝0.7×E1 (2)
in the ejection process, considering the influence of external factors such as friction, air resistance and the like, the energy transfer efficiency is set to be 90 percent, and the energy transfer efficiency is obtained according to the energy conservation principle:
Figure BDA0002864867290000062
where m is the mass of the bomb (in this embodiment, m is 0.8 kg), and V is the initial velocity of the bomb.
The combined type (1), (2) and (3) are as follows:
Figure BDA0002864867290000063
the time t required for reaching the highest point in the process of oblique projectile motion1Comprises the following steps:
t1＝V sinθ/g
as shown in fig. 9, the vertical distance h between the maximum height to which the life buoy rises and the initial position of the pop-up1Comprises the following steps:
Figure BDA0002864867290000064
time t taken for falling from the highest point to the target position2Solving according to the following formula:
Figure BDA0002864867290000065
wherein h is2The vertical distance between the initial position and the water surface for the life-saving bomb to pop up (h is taken in the embodiment)22, in m); then, the following steps are obtained:
Figure BDA0002864867290000066
thus, the farthest horizontal distance S that the life-saving bomb can reach is as follows:
Figure BDA0002864867290000071
the substituted data is solved, and S is 24 meters in the embodiment.
The ejection method of the portable water rescue ejector comprises the following specific steps:
firstly, a rescuer visually inspects the horizontal distance between a person falling into water and the shore, and selects a standing point according to the farthest horizontal distance (marked in finished products and capable of designing finished products with different specifications) which can be reached by a lifesaving bomb and the estimated distance between the standing point and the shore; then, the rescue worker moves the sliding booster 6 backwards along the guide rod 10, the roller 6-2 rolls on the guide slide rail 7, the compression spring 4 is compressed, and the extension spring 9 is extended; when the guide block 6-3 of the sliding booster 6 reaches the upper part of the trigger mechanism 5, the inclined surface at the bottom of the guide block 6-3 downwards presses the lock rod 5-1, and the torsion spring stores energy; after the guide block 6-3 passes over the lock rod 5-1, the lock rod 5-1 is reset under the action of the restoring force of the torsion spring and the limiting action of the fixing bolt 5-2 at the top of the lock rod 5-1; the locking rod 5-1 drives the top of the wrench 5-3 to swing backwards, and the position of the wrench 5-3, which is close to the lower part of the middle positioning pin 5-4, is limited by the fixing bolt 5-2 below the positioning pin 5-4; after the guide block 6-3 passes over the lock rod 5-1, the rescue worker loosens the sliding booster 6, and the sliding booster 6 pushes the top of the lock rod 5-1 upwards under the restoring force action of the compression spring 4 and the extension spring 9, but is limited by the top of the lock rod 5-1; and then the elastic rope 2-2 is stretched and hung on the convex strip outside the groove of the guide block 6-3, and the elastic rope 2-2 is in a stretching state.
Step two, the trigger 5-3 is pulled to align the position of a person falling into the water, so that the bottom of the trigger 5-3 swings backwards, the top of the trigger 5-3 drives the bottom of the lock rod 5-1 to swing forwards, and the top of the lock rod 5-1 swings backwards, so that the sliding booster 6 is pushed to move backwards; after the lock rod 5-1 passes over the sliding booster 6, the sliding booster 6 is not restrained by the lock rod 5-1, so that the elastic rope 2-2, the compression spring 4 and the extension spring 9 move forwards along the guide rod 10 under the action of restoring force, and the life-saving bomb 3 is launched out along the V-shaped guide side plate 8; when the life-saving bomb 3 reaches the position near a person falling into the water, the rope 3-2-4 connected with the push-aid rod 6-1 is tensioned, the rope 3-2-4 opens the trigger switch 3-2-3 of the high-pressure gas cylinder 3-2-2, the high-pressure gas cylinder 3-2-2 inflates the life jacket 3-2-1, and the life jacket 3-2-1 filled with gas breaks the life-saving bomb shell 3-1 and floats to the person falling into the water; then, the life jacket 3-2-1 and the rope 3-2-4 cooperate to remotely rescue people falling into the water.

Claims (5)

1. A portable water rescue catapult comprises a frame, a compression spring, a trigger mechanism, a guide rod and a hand bracket; the method is characterized in that: the lifesaving device also comprises a spring piece mechanism, a lifesaving bullet, a sliding booster, a V-shaped guide side plate and an extension spring; the hand bracket is fixed at the front end of the bottom of the frame; the sliding booster comprises a boosting rod, a roller and a guide block; the guide block and a guide rod fixed on the rack form a sliding pair, the front end of the sliding pair is connected with the rack through an extension spring, and the rear end of the sliding pair is connected with the rack through a compression spring; the front end of the guide block is provided with a groove; the outer side of the groove is provided with a raised line which is integrally formed; the compression spring is sleeved on the guide rod; two sides of the guide block are hinged with two rollers; the two rollers and the two guide slide rails fixed on the frame respectively form rolling friction; the bottom of the guide block is wedge-shaped, and the inclined plane is arranged backwards; the boosting rod is fixed at the top of the guide block; the spring piece mechanism comprises a fixed pulley, an elastic rope and a spring piece; the middle part of the spring piece is fixed at the front end of the frame, and two ends of the spring piece are respectively hinged with a fixed pulley; the annular elastic rope is sleeved on the two fixed pulleys and is fixed with both ends of the spring piece; two V-shaped guide side plates which are arranged at intervals are fixed at the top of the frame, and the life-saving bomb is arranged between the two V-shaped guide side plates; the life-saving bomb comprises a life-saving bomb shell and a life jacket assembly; the lifesaving cartridge case and the two V-shaped guide side plates form a sliding pair; the life jacket component comprises a life jacket, a high-pressure gas cylinder, a trigger switch and a rope; the air outlet of the high-pressure air bottle is communicated with the inner cavity of the life jacket, and a trigger switch is arranged at the air outlet of the high-pressure air bottle; one end of the rope is fixed with a trigger switch of the high-pressure gas cylinder, the other end of the rope is fixed with a boosting rod of the sliding booster, and the rope is wound on the boosting rod; the life jacket and the high-pressure gas cylinder are both arranged in the life-saving cartridge case;
the trigger mechanism comprises a lock rod, a fixing bolt, a spanner and a positioning pin; the middle part of the lock rod is hinged with the bottom of the frame through a positioning pin and is connected with the frame through a torsional spring sleeved on the positioning pin; the top end of the lock rod is hinged with a roller; a fixed bolt for limiting the top of the lock rod is fixed on one side, close to the spring piece mechanism, of the top of the lock rod of the frame; the middle part of the wrench is hinged with the bottom of the frame through a positioning pin, and the top of the wrench is contacted with the bottom of the locking rod; a fixing bolt for limiting the wrench is fixed on one side of the machine frame, which is close to the spring leaf spring mechanism and below the positioning pin in the middle of the wrench.
2. The portable water rescue catapult as claimed in claim 1, wherein: the roller is axially positioned through the clamp spring.
3. The portable water rescue catapult as claimed in claim 1, wherein: and a fixing bolt for limiting the lock rod is fixed on one side of the bottom of the lock rod of the frame, which is close to the spring piece mechanism.
4. The portable water rescue catapult as claimed in claim 1, wherein: when the launching angle is theta, the horizontal distance for the life-saving bomb to launch is calculated as follows:
sum E of work done by extension spring and compression spring during ejection1Comprises the following steps:
Figure FDA0002864867280000021
wherein k is1Is the elastic coefficient of the tension spring, /)1Amount of deformation of the tension spring, k2To compress the spring constant of the spring, /)2Is the deformation of the compression spring;
sum of spring leaf and elastic rope acting E2The design is as follows:
E2＝0.7×E1 (2)
in the ejection process, the energy transfer efficiency is set to be 90%, and the ejection method is obtained according to the energy conservation principle:
Figure FDA0002864867280000022
wherein m is the mass of the life-saving bomb, and V is the initial speed of the life-saving bomb;
the combined type (1), (2) and (3) are as follows:
Figure FDA0002864867280000023
the time t required for reaching the highest point in the process of oblique projectile motion1Comprises the following steps:
t1＝Vsinθ/g
vertical distance h between the maximum height of the life-saving bomb and the initial position of the bomb1Comprises the following steps:
Figure FDA0002864867280000024
time t taken for falling from the highest point to the target position2Solving according to the following formula:
Figure FDA0002864867280000025
wherein h is2Popping the vertical distance between the initial position and the water surface for the life-saving bomb; then, the following steps are obtained:
Figure FDA0002864867280000026
thus, the farthest horizontal distance S that the life-saving bomb can reach is as follows:
Figure FDA0002864867280000027
5. the ejection method of the portable water rescue ejector as claimed in any one of claims 1 to 4, wherein: the method comprises the following specific steps:
firstly, a rescuer visually inspects the horizontal distance between a person falling into water and the shore, and selects a standing point according to the farthest horizontal distance which can be reached by a lifesaving bomb and the estimated distance between the standing point and the shore; then, the rescue worker moves the sliding booster backwards along the guide rod, and the roller rolls on the guide slide rail, so that the compression spring is compressed, and the extension spring is extended; when the guide block of the sliding booster reaches the upper part of the trigger mechanism, the inclined plane at the bottom of the guide block presses the lock rod downwards, and the torsion spring stores energy; after the guide block passes over the lock rod, the lock rod resets under the action of the restoring force of the torsion spring and the limiting action of the fixing bolt at the top of the lock rod; the locking rod drives the top of the wrench to swing backwards, and the position of the wrench, which is close to the lower part of the middle positioning pin, is limited by the fixing bolt below the positioning pin; after the guide block crosses the lock rod, the rescue worker loosens the sliding booster, and the sliding booster pushes the top of the lock rod upwards under the restoring force action of the compression spring and the extension spring, but is limited by the top of the lock rod; then the elastic rope is stretched and hung on the raised line outside the groove of the guide block, and at the moment, the elastic rope is in a stretching state;
secondly, the trigger is pulled to align the position of the person falling into the water, so that the bottom of the trigger swings backwards, the top of the trigger drives the bottom of the lock rod to swing forwards, and the top of the lock rod swings backwards, so that the sliding booster is pushed to move backwards; when the lock rod passes over the sliding booster, the sliding booster is not restrained by the lock rod any more, so that the sliding booster moves forwards along the guide rod under the action of the restoring force of the elastic rope, the compression spring and the extension spring, and the life-saving bomb is launched out along the V-shaped guide side plate; when the life-saving bomb reaches the position near a person falling into the water, the rope connected with the boosting rod is tensioned, the rope turns on a trigger switch of the high-pressure gas cylinder, the high-pressure gas cylinder inflates the life jacket, and the life jacket filled with gas breaks through the life-saving bomb shell and floats to the side of the person falling into the water; then, the person falling into the water is remotely rescued under the synergistic action of the life jacket and the rope.
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US5749348A (en) * 1996-02-26 1998-05-12 Oviedo-Reyes; Alfonso Separating stock hydraulic crossbow
CN202350659U (en) * 2011-10-28 2012-07-25 李小晖 Simple crossbow
CN105492857A (en) * 2013-08-19 2016-04-13 瑟本特·鲁勒运动有限公司 Elastic projectile propulsion systems and methods
CN205175220U (en) * 2015-11-03 2016-04-20 漳平市国联玩具礼品有限公司 Bow and crossbow formula toy gun
US20160273868A1 (en) * 2015-03-17 2016-09-22 Willard D. Carroll, Jr. Powered Bow Having an Internal Acceleration System
CN110230946A (en) * 2019-06-10 2019-09-13 杨洪开 Repeating type bow and crossbow applied to shooting recreation ground
CN210653593U (en) * 2019-08-28 2020-06-02 邹立新 Simple overwater projection life-saving device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5749348A (en) * 1996-02-26 1998-05-12 Oviedo-Reyes; Alfonso Separating stock hydraulic crossbow
CN202350659U (en) * 2011-10-28 2012-07-25 李小晖 Simple crossbow
CN105492857A (en) * 2013-08-19 2016-04-13 瑟本特·鲁勒运动有限公司 Elastic projectile propulsion systems and methods
US20160273868A1 (en) * 2015-03-17 2016-09-22 Willard D. Carroll, Jr. Powered Bow Having an Internal Acceleration System
CN205175220U (en) * 2015-11-03 2016-04-20 漳平市国联玩具礼品有限公司 Bow and crossbow formula toy gun
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