CN114796910A - Fire rescue is broken and is torn open device - Google Patents
Fire rescue is broken and is torn open device Download PDFInfo
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- CN114796910A CN114796910A CN202210635606.7A CN202210635606A CN114796910A CN 114796910 A CN114796910 A CN 114796910A CN 202210635606 A CN202210635606 A CN 202210635606A CN 114796910 A CN114796910 A CN 114796910A
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- oil cylinder
- piston
- primary
- blades
- oil
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B3/00—Devices or single parts for facilitating escape from buildings or the like, e.g. protection shields, protection screens; Portable devices for preventing smoke penetrating into distinct parts of buildings
- A62B3/005—Rescue tools with forcing action
Abstract
The invention relates to a fire rescue forcible entry device, which effectively solves the problem of low efficiency of the conventional forcible entry tool; the technical scheme includes that the device comprises a primary oil cylinder and a secondary oil cylinder, wherein a primary piston is arranged in the primary oil cylinder, the secondary oil cylinder coaxially penetrates into the primary oil cylinder from the upper end and is fixed on the primary piston, a plurality of horizontal first blades are uniformly distributed on the circumference of the upper end of the primary oil cylinder, a plurality of second blades with the same number as the first blades are uniformly distributed on the circumference of the side wall of the secondary oil cylinder, the inner ends of the second blades are hinged to the outer wall of the secondary oil cylinder, a support rod is connected between each second blade and a piston rod, the piston rod can move downwards to support the plurality of second blades through the support rods, and the secondary oil cylinder can pull the second blades to move downwards to be matched with the first blades for shearing; the invention can divide the demolition area into a plurality of fan-shaped small pieces at one time, can greatly shorten the time of emergency demolition, strives for more time for rescue, and improves the success rate of rescue.
Description
Technical Field
The invention relates to the field of fire rescue, in particular to a fire rescue breaking and dismantling device.
Background
In rescue activities, steel bar meshes such as isolation nets, anti-theft windows and protection cages are frequently broken and dismantled, at present, steel bar pliers, cutting machines and the like are generally used for breaking and dismantling, steel bars are required to be sheared or cut one by one, breaking and dismantling efficiency is low, rescue work often has the property that time is lost, and therefore existing breaking and dismantling workers have objective necessity of upgrading.
Disclosure of Invention
The invention provides a fire rescue forcible entry device, and aims to solve the problem that the conventional forcible entry tool is low in efficiency.
The fire rescue breaking and dismantling device comprises a primary oil cylinder and a secondary oil cylinder, wherein a primary piston is arranged in the primary oil cylinder, the secondary oil cylinder coaxially penetrates into the primary oil cylinder from the upper end and is fixed on the primary piston, a first oil port is formed in the lower end of the primary oil cylinder, a secondary piston is arranged in the secondary oil cylinder, a piston rod is fixed at the upper end of the secondary piston, a second oil port is formed in the upper end of the secondary oil cylinder, a first oil duct is formed in the bottom of the secondary oil cylinder, and the first oil duct penetrates through the primary piston; a second oil duct is formed in the side wall of the second-stage oil cylinder, the upper end of the second oil duct is communicated with the second-stage oil cylinder but is higher than the bottom of the second-stage oil cylinder, a second-stage piston can move downwards below the upper end of the second oil duct, and the lower end of the second oil duct is positioned above the piston and is always positioned in the first-stage oil cylinder; a plurality of horizontal first blades are uniformly distributed on the upper end of the primary oil cylinder in a circumferential mode, second blades with the same number as the first blades are uniformly distributed on the side wall of the secondary oil cylinder in a circumferential mode, the inner ends of the second blades are hinged to the outer wall of the secondary oil cylinder, a support rod is connected between each second blade and the piston rod, the upper end of each support rod is hinged to the top of the piston rod, and the lower end of each support rod is hinged to the position, close to the outer end, of each second blade.
And a spring is arranged at the lower end of the inner cavity of the secondary oil cylinder, and the spring is compressed when the secondary piston moves below the upper port of the second oil duct.
A circular groove is formed in the top of the inner cavity of the primary oil cylinder, and when the primary piston is located at the uppermost end, the lower port of the second oil duct is located in the circular groove.
The inner end of the first blade is fixed on the end face of the primary oil cylinder through a vertical rod, and an inclined support rod is connected between the outer end of the first blade and the side wall of the primary oil cylinder.
And the second blade forms a fixed included angle with the first blade when being completely unfolded.
The invention can divide the breaking and dismantling area into a plurality of fan-shaped small pieces at one time, and then each small piece is bent to quickly form an emergency passage, thereby greatly shortening the emergency breaking and dismantling time, striving for more time for rescue and improving the success rate of rescue.
Drawings
Fig. 1 is a front sectional view of the present invention in an initial state.
Fig. 2 is a front cross-sectional view of the present invention with the second blade fully extended.
Fig. 3 is a front cross-sectional view of the present invention as cut.
Fig. 4 is an end view of a plurality of sets of blades of the present invention.
Fig. 5 is an enlarged view of the position a in fig. 1.
Fig. 6 is an enlarged view of the position B in fig. 2.
Detailed Description
With reference to the attached drawing, the hydraulic oil cylinder comprises a primary oil cylinder 1 and a secondary oil cylinder 2, wherein a primary piston 3 is arranged in the primary oil cylinder 1, the secondary oil cylinder 2 coaxially penetrates into the primary oil cylinder 1 from the upper end and is fixed on the primary piston 3, a first oil port 4 is arranged at the lower end of the primary oil cylinder 1, a secondary piston 5 is arranged in the secondary oil cylinder 2, a piston rod 6 is fixed at the upper end of the secondary piston 5, a second oil port 7 is arranged at the upper end of the secondary oil cylinder 2, a first oil duct 8 is arranged at the bottom of the secondary oil cylinder 2, the first oil duct 8 penetrates through the primary piston 3, when hydraulic oil is injected from the second oil port 7 to the upper part of the secondary piston 5, the secondary piston 5 descends, and the hydraulic oil below the secondary piston 5 enters the primary oil cylinder 1 through the first oil port 8 and then is discharged from the first oil port 4; a second oil duct 9 is formed in the side wall of the second oil duct 2, the upper end of the second oil duct 9 is communicated with the second oil duct 2 and is higher than the bottom of the second oil duct 2, the second piston 5 can move downwards below the upper end of the second oil duct 9, the lower end of the second oil duct 9 is positioned above the piston and is always positioned in the first oil duct 1, when the second piston 5 is positioned above the upper end of the second oil duct 9 and hydraulic oil is filled from the second oil port 7, the upper side of the second piston 5 is positioned in a high-pressure area, the lower side of the second piston is positioned in a low-pressure area, therefore, the second piston 5 moves downwards, the upper side and the lower side of the first oil duct 1 are both positioned in the low-pressure area, but the area of the lower side of the first piston 3 is larger than the area of the upper side, therefore, the first piston 3 is positioned at the highest position and does not move, and when the second piston 5 moves downwards below the upper port of the second oil duct 9, the upper side of the first piston 3 becomes the high-pressure area, therefore, the first piston 3 starts to move downwards; a plurality of horizontal first blades 10 which are uniformly distributed on the circumference are fixed at the upper end of the primary oil cylinder 1, a plurality of second blades 11 which are the same as the first blades 10 in number are uniformly distributed on the circumference of the side wall of the secondary oil cylinder 2, the inner ends of the second blades 11 are hinged on the outer wall of the secondary oil cylinder 2, a support rod 12 is connected between each second blade 11 and the piston rod 6, the upper end of each support rod 12 is hinged at the top of the piston rod 6, the lower end of each support rod 12 is hinged at the position, close to the outer end, of the second blade 11, when the piston rod 6 extends out, the support rods 12 draw the outer ends of the second blades 11 towards the middle, the second blades 11 are furled around the secondary oil cylinder 2, when the piston cylinder retracts into the secondary oil cylinder 2, the support rods 12 stretch the second blades 11 outwards, when the secondary oil cylinder 2 moves downwards, the second blades 11 which are stretched form shearing with the first blades 10, a reinforcing mesh is cut off, and a plurality of groups of first blades 10 and second blades 11 form a plurality of shearing paths, the reinforcing mesh is divided into a plurality of pieces.
A spring 13 is arranged at the lower end of the inner cavity of the secondary oil cylinder 2, and the spring 13 is compressed when the secondary piston 5 moves below the upper port of the second oil duct 9; the existence of the spring 13 enables the secondary piston 5 to have a small movement allowance up and down, when the shearing resistance is too large, the steel bar is sheared by the force of the primary piston 3, the pressure in the oil cylinder is increased, the secondary piston 5 compresses the spring 13 to move downwards continuously, the second blade 11 is unfolded continuously, the included angle between the second blade 11 and the first blade 10 is reduced, the steel bar is sheared by using the lever principle like scissors, and the pulling force of the primary piston 3 is matched, so that the steel bar can be sheared easily, and the shearing speed is improved.
The top of the inner cavity of the primary oil cylinder 1 is provided with a circular groove 14, when the primary piston 3 is positioned at the uppermost end, the lower port of the second oil channel 9 is positioned in the circular groove 14, and the lower port of the second oil channel 9 is prevented from being blocked.
The inner end of the first blade 10 is fixed on the end surface of the primary oil cylinder 1 through a vertical rod 15, a diagonal brace 16 is connected between the outer end of the first blade 10 and the side wall of the primary oil cylinder 1, and the stability of the first blade 10 is maintained through a triangular structure.
When the second blade 11 is completely unfolded, a fixed included angle is formed between the second blade 11 and the first blade 10, but not between the second blade 11 and the first blade 10, so that the second blade 11 obliquely and gradually cuts into the reinforcing steel bars, and the cutting resistance can be reduced.
When the hydraulic oil cylinder is used, the secondary oil cylinder 2 and the piston rod 6 are in a completely extended state at the beginning, the plurality of second blades 11 are folded around the secondary oil cylinder 2 and the piston rod 6, at the moment, the piston rod 6, the secondary oil cylinder 2 and the plurality of second blades 11 extend to the other side of the reinforcing mesh from meshes of the breaking and dismantling positions, so that the plurality of first blades 10 are attached to the reinforcing mesh, hydraulic oil is pumped into the secondary oil cylinder 2 through the second oil port 7, the piston cylinder pushes the secondary piston 5 and moves downwards, and the support rods 12 on the piston cylinder support the plurality of second blades 11; when the secondary piston 5 moves downwards, hydraulic oil below the secondary piston 5 flows into the lower side of the primary piston 3 through the first oil duct 8 and is then discharged from the first oil port 4, at the moment, the pressure of the upper side and the lower side of the primary piston 3 are the same and are both in a low-pressure area, but the stress area of the lower side of the primary piston 3 is larger than that of the upper side, so that the primary piston 3 is kept still; when the secondary piston 5 moves below the upper port of the second oil duct 9, the second blade 11 is completely unfolded to form a shearing potential with the first blade 10, at the moment, the spring 13 is compressed, high-pressure oil above the secondary piston 5 acts on the upper side of the primary piston 3 through the second oil duct 9, and the lower side of the primary piston 3 is still a low-pressure area, so that the secondary piston 5 pulls the secondary oil cylinder 2 to move downwards, and the plurality of second blades 11 move downwards along with the secondary oil cylinder 2 and are matched with the first blade 10 to cut off the steel bars; when second blade 11 just contacted a certain reinforcing bar, often the cutting resistance can increase steeply, then the oil pressure of second grade piston 5 top also can corresponding increase, consequently spring 13 can further compress, second grade piston 5 moves down for a short time, second blade 11 rotates around the pin joint for a short time and utilizes lever principle to cut steel bar, the resistance reduces after cutting off this reinforcing bar, under spring 13's effect, second grade piston 5 shifts up for a short time and resets, 3 pulling second grade hydro-cylinder 2 of one-level piston and second blade 11 move down fast simultaneously, second blade 11 contacts the reinforcing bar every time, all can utilize lever principle cooperation one-level piston 3's pull-down action to cut the reinforcing bar to the scissors is the same, guarantee that the blade cuts into smoothly, and improve cutting efficiency.
After the first blade 10 and the second blade 11 completely cut off the steel bars in the included angle, hydraulic oil is pumped from the first oil port 4, the hydraulic oil pushes the primary piston 3 and the secondary piston 5 to move upwards, the plurality of second blades 11 return to the folded state, then the device is pulled out from meshes, the steel bar mesh breaking and dismantling area is cut into a plurality of fan-shaped blocks, the fan-shaped blocks are bent towards the inner side of the steel bar mesh by using a crow bar or a hammer, a passable hole is formed, and rescue workers can enter for emergency rescue; while rescuing, other personnel can trim or enlarge the hole for the later rescued goods and materials, personnel and rescuers to come out more quickly.
When the device is used for breaking and dismantling the reinforcing mesh, the multi-area segmentation of the reinforcing mesh can be completed only by pumping oil once without cutting reinforcing bars one by one, the breaking and dismantling area is segmented into a plurality of fan-shaped small pieces, and each small piece is bent to quickly form an emergency passage, so that the emergency breaking and dismantling time can be greatly shortened, more time is obtained for rescue, and the success rate of rescue is improved; simultaneously, through the cooperation action of one-level piston 3 and second grade piston 5, can utilize lever principle to cut the reinforcing bar when second blade 11 contacts the reinforcing bar, can guarantee again that second blade 11 is close to the reinforcing bar fast when no-load, compromise brokenly to tear dynamics and speed open, effectively carry brokenly to tear efficiency open.
Claims (5)
1. The fire rescue breaking and dismantling device is characterized by comprising a primary oil cylinder (1) and a secondary oil cylinder (2), wherein a primary piston (3) is arranged in the primary oil cylinder (1), the secondary oil cylinder (2) coaxially penetrates into the primary oil cylinder (1) from the upper end and is fixed on the primary piston (3), a first oil port (4) is formed in the lower end of the primary oil cylinder (1), a secondary piston (5) is arranged in the secondary oil cylinder (2), a piston rod (6) is fixed at the upper end of the secondary piston (5), a second oil port (7) is formed in the upper end of the secondary oil cylinder (2), a first oil duct (8) is formed in the bottom of the secondary oil cylinder (2), and the first oil duct (8) penetrates through the primary piston (3); a second oil duct (9) is formed in the side wall of the second-stage oil cylinder (2), the upper end of the second oil duct (9) is communicated with the second-stage oil cylinder (2) but is higher than the bottom of the second-stage oil cylinder (2), a second-stage piston (5) can move downwards below the upper end of the second oil duct (9), and the lower end of the second oil duct (9) is located above the piston and is always located in the first-stage oil cylinder (1); the upper end of the primary oil cylinder (1) is fixed with a plurality of first blades (10) which are uniformly distributed in the circumferential direction and are horizontal, the side wall of the secondary oil cylinder (2) is uniformly distributed with second blades (11) which are the same as the first blades (10) in number in the circumferential direction, the inner ends of the second blades (11) are hinged to the outer wall of the secondary oil cylinder (2), a supporting rod (12) is connected between each second blade (11) and the piston rod (6), the upper end of each supporting rod (12) is hinged to the top of the piston rod (6), and the lower end of each supporting rod is hinged to the position, close to the outer end, of each second blade (11).
2. A fire rescue breaking device as claimed in claim 1, wherein a spring (13) is mounted at the lower end of the inner chamber of the secondary cylinder (2), and the secondary piston (5) compresses the spring (13) when moving below the upper port of the second oil passage (9).
3. A fire rescue breaking and dismantling device as claimed in claim 1, wherein the top of the inner cavity of the primary cylinder (1) is provided with a circular groove (14), and when the primary piston (3) is located at the uppermost end, the lower port of the second oil passage (9) is located in the circular groove (14).
4. A fire rescue breaking and dismantling device as claimed in claim 1, wherein the inner end of the first blade (10) is fixed to the end surface of the primary cylinder (1) through an upright rod (15), and a diagonal brace (16) is connected between the outer end of the first blade (10) and the side wall of the primary cylinder (1).
5. A fire rescue break open device as claimed in claim 1, characterized in that the second blade (11) is at a fixed angle to the first blade (10) when fully extended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635606.7A CN114796910B (en) | 2022-06-07 | 2022-06-07 | Fire rescue is broken and is torn open device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210635606.7A CN114796910B (en) | 2022-06-07 | 2022-06-07 | Fire rescue is broken and is torn open device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114796910A true CN114796910A (en) | 2022-07-29 |
| CN114796910B CN114796910B (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210635606.7A Active CN114796910B (en) | 2022-06-07 | 2022-06-07 | Fire rescue is broken and is torn open device |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1406836A (en) * | 1971-09-13 | 1975-09-17 | Wirth Co Kg Masch Bohr | Rotary shear |
| CN2792671Y (en) * | 2005-06-06 | 2006-07-05 | 郭明方 | Fast hydraulic cutter |
| CN103889626A (en) * | 2011-10-25 | 2014-06-25 | 西门子Vai金属科技有限责任公司 | Drum shear |
| CN106581879A (en) * | 2017-02-13 | 2017-04-26 | 杭州众铎消防科技有限公司 | Electric hydraulic device |
| WO2017107136A1 (en) * | 2015-12-24 | 2017-06-29 | 伊卡路斯(苏州)车辆系统有限公司 | Hydraulic buffering system and assembly method |
| CN108999836A (en) * | 2018-09-30 | 2018-12-14 | 中船重工重庆液压机电有限公司 | Piston rod oil inlet Double Acting Telescopic Hydraulic Cylinder |
| CN208364524U (en) * | 2018-06-07 | 2019-01-11 | 南京林业大学 | A kind of fruit picker |
-
2022
- 2022-06-07 CN CN202210635606.7A patent/CN114796910B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1406836A (en) * | 1971-09-13 | 1975-09-17 | Wirth Co Kg Masch Bohr | Rotary shear |
| CN2792671Y (en) * | 2005-06-06 | 2006-07-05 | 郭明方 | Fast hydraulic cutter |
| CN103889626A (en) * | 2011-10-25 | 2014-06-25 | 西门子Vai金属科技有限责任公司 | Drum shear |
| WO2017107136A1 (en) * | 2015-12-24 | 2017-06-29 | 伊卡路斯(苏州)车辆系统有限公司 | Hydraulic buffering system and assembly method |
| CN106581879A (en) * | 2017-02-13 | 2017-04-26 | 杭州众铎消防科技有限公司 | Electric hydraulic device |
| CN208364524U (en) * | 2018-06-07 | 2019-01-11 | 南京林业大学 | A kind of fruit picker |
| CN108999836A (en) * | 2018-09-30 | 2018-12-14 | 中船重工重庆液压机电有限公司 | Piston rod oil inlet Double Acting Telescopic Hydraulic Cylinder |
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| Publication number | Publication date |
|---|---|
| CN114796910B (en) | 2022-12-20 |
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