Inner cylinder of explosion-venting-type aerosol fire extinguishing device

Abstract

The present disclosure relates to an inner cylinder of an explosion-venting-type aerosol fire extinguishing device, including a cylinder body (3) and a cylinder cover component (4) arranged on one end of the cylinder body (3), and an explosion-venting device arranged on the cylinder body (3). The explosion-venting device includes a friction layer (11), a connecting rod (12), a guiding unit (13), and a limiting device (14). The connecting rod (12) are connected with the cylinder cover component (4). The friction layer (11) is provided between the connecting rod (12) and the cylinder body (3). The friction layer (11) provides a frictional resistance and a buffering force for the connecting rod (12) when the connecting rod (12) is displaced, under the guidance of the guiding unit (13), along a direction that a hot air stream of the cylinder body (3) is jetting towards. The guiding unit (13) is a device capable of providing guidance for the connecting rod (12) when the connecting rod (12) is moving. The limiting device (14), the cylinder cover component (4), and the connecting rod (12) are fixedly connected. The limiting device (14) limits the connecting rod (12) when an extremity thereof slides to the cylinder cover component (4). The present disclosure uses primarily the movement and limiting of the explosion-venting device to consume kinetic energy generated by deflagration, thus achieving the goal of safe and effective explosion ventilation, and preventing a grain (7) from causing injuries and damages when deflagrated.

Claims

1. An inner cylinder of an explosion-venting-type aerosol fire extinguishing device, comprising: a cylinder body and a cylinder cover component arranged on one end of the cylinder body, wherein an explosion-venting device is also arranged on the cylinder body; the explosion-venting device comprises: a connecting rod, a guiding unit, and a limiting device; the connecting rod is connected with the cylinder cover component; the guiding unit is a device capable of providing guidance for the connecting rod when the connecting rod is moving; the limiting device is a device capable of fixing the connecting rod and capable of limiting the connecting rod when an extremity of the connecting rod slides to the cylinder cover component; during a process in which the cylinder cover component is separated from the limiting device and slides forwards, the original high pressure gas in the cylinder body will be dispersed or consumed rapidly because of the expansion of the outlet (venting pressure outlet); the explosion-venting device further comprises a friction layer (11); the friction layer (11) is provided between the connecting rod (12) and the cylinder body (3); the friction layer (11) provides a frictional resistance and a buffering force for the connecting rod (12) when the connecting rod (12) is displaced, under the guidance of the guiding unit (13), along a direction towards which a hot air stream of the cylinder body (3) is jetting; the connecting rod is fixedly connected with the cylinder cover component or integrated with the cylinder cover component; the displacement of the connecting rod is ranged from 30 mm to 80 mm; a spout of the cylinder cover component is sealed by a rubber plug; a sealing ring is arranged on the junction of the cylinder cover component and the cylinder body; the section of the sealing ring is circular.

2. The inner cylinder of the explosion-venting-type aerosol fire extinguishing device according to claim 1, wherein the guiding unit is a guiding ring fixedly connected with the connecting rod, or a guiding groove provided on an outer wall of the cylinder body and capable of making the connecting rod slide axially along the guiding groove; the limiting device comprises a flanging fixedly connected with the cylinder body and a clamping claw for fixing the connecting rod; a buffer is further arranged between the flanging and the guiding ring.

3. The inner cylinder of the explosion-venting-type aerosol fire extinguishing device according to claim 2, wherein the flanging and the cylinder body are integrated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural diagram of an inner cylinder of the present invention;

(2) FIG. 2 is a sectional view of an inner cylinder of the present invention.

(3) In the figures: 1aerosol fire extinguishing device; 2explosion-venting device; 3cylinder body; 4cylinder cover component; 5ceramic honeycomb cooling layer; 6coolant; 7grain; 8ignition head; 9sealing ring; 10rubber plug; 11friction layer; 12connecting rod; 13guiding unit; 14limiting device; 15guiding ring; 16flanging; 17clamping claw; 18buffer; 19heat preservation and insulation layer.

DETAILED DESCRIPTION OF THE INVENTION

(4) Preferred embodiments of an inner cylinder of an explosion-venting-type aerosol fire extinguishing device of the present invention will be further described in combination with the accompanying drawings.

(5) Referring to FIG. 1 and FIG. 2, the inner cylinder of the aerosol fire extinguishing device 1 of the present invention may adopt an inner cylinder with an existing structure, on which an explosion-venting device is added to solve the problem that an existing aerosol fire extinguishing device 1 fails to prevent explosion and vent pressure; or may adopt other cylinders which relates to the inner cylinders of aerosol fire extinguishing devices with explosion prevention and pressure venting requirements.

(6) The inner cylinder of the present embodiment includes a cylinder body 3. A cylinder cover component 4 is further arranged on a top end of the cylinder body 3. A ceramic honeycomb cooling layer 5, a coolant 6, a grain 7 and an ignition head 8 arranged on a front end face of the grain 7 are arranged in the cylinder body 3 in turn. Generally, the cylinder body 3 and the cylinder cover component 4 are hermetically connected via a sealing ring 9, wherein the section of the sealing ring 9 may be square, circular, or in other shapes. The cylinder cover component 4 includes a spout and a horn nozzle, and the center of the spout directly faces the center of the horn nozzle. The spout may be sealed by a rubber plug 10 or an aluminum foil. In addition, the ceramic honeycomb cooling layer 5, on one hand, can fix the coolant 6 to prevent the coolant 6 from dropping out, on the other hand, has a physical cooling effect to cool a high temperature hot aerosol. Generally, the ceramic honeycomb cooling layer 5 may be arranged on a front end of the coolant 6, or may be also arranged in the middle of the coolant 6, or may be also arranged on both the front end and the middle of the coolant 6, and the positions and number thereof are determined according to actual application conditions. One end with a larger diameter of the horn nozzle of the present invention is connected with the honeycomb cooling layer to guide the aerosol to be spouted out from the spout, and the horn nozzle may be integrated with a cylinder cover. A heat preservation and insulation layer 19, which has a heat preservation and insulation function, may be further added between the grain 7 and an inner wall of the cylinder body 3, thus preventing heat generated after ignition of the aerosol from being dispersed to burn surrounding personnel or materials.

(7) The explosion-venting device 2 of the present invention mainly includes a friction layer 11, a connecting rod 12, a guiding unit 13, a limiting unit 14 and a buffer 18, wherein the connecting rod 12 is connected on the cylinder cover component 4 and may be fixedly connected with the cylinder cover component 4 via welding and riveting etc., or may be directly provided as an integral structure so as to realize a higher structural strength. The friction layer 11 may be one or more rubber rings, or silica gel layers, or other materials that can provide a sufficient frictional resistance for axial sliding of the connecting rod 12. The friction layer 11 may be arranged between the connecting rod 12 and the cylinder body 3, or may be directly fixed on an inner side of the connecting rod 12. When the connecting rod 12 shifts axially along the cylinder body 3 under the guidance of the guiding unit 13, the friction layer 11 provides a frictional resistance and a buffering force for the connecting rod. The guiding unit 13 is an device that can provide guidance for the connecting rod 12 when the connecting rod 12 is moving. The guiding unit may be a guiding ring 15 fixedly connected with the connecting rod 12, or may be also a guiding groove arranged on an outer wall of the cylinder body 3 and capable of making the connecting rod 12 slide along the guiding groove, or a slide rail, or other structures with a guiding effect. The guiding structure can prevent the connecting rod 12 from being displaced or clamped during a moving process of the cylinder body 13. When a guiding ring 15 is applied for guiding, the guiding ring 15 and an extremity of the connecting rod 12 may be fixedly connected, or may be directly provided as an integral structure. The limiting device 14 of the present invention is an device that can fix the connecting rod 12 and limit the connecting rod 12 when the connecting rod 12 slides to the cylinder cover component 4. When the extremity of the connecting rod 12 reaches a position as shown of the cylinder cover component 4, the connecting rod is limited by the limiting device 14. The limiting device 14 mainly includes a flanging 16 and a clamping claw 17, wherein the flanging 16 and the cylinder body 3 are fixedly connected, or may be also directly provided as an integral structure while one end of the clamping claw 17 is fixed on the connecting rod 12 and the other end is clamped with the cylinder body 3, which is mainly used for fixing the connecting rod 12. The connecting rod 12 may be also integrated with the clamping claw 17, or the limiting device 14 of the present invention may be also other structures, which can fix the connecting rod 12 on one hand, and stop or prevent the connecting rod 12 from being separated from the cylinder body 3. The flanging 16 of the present invention may be also arranged on a lug boss of the opening of the cylinder body, and may be also integrated with a guiding groove. The structure of the flanging is determined according to an application environment. When the guiding unit 13 adopts a guiding ring 15, the buffer 18 may be further arranged between the guiding ring 15 and the flanging 16 for buffering a collision force between the guiding ring 15 or the extremity of the connecting rod 12 and the cylinder body 3 or the flanging 16 to prolong a collision duration and consume, by releasing elastic potential energy of the buffer, a part of kinetic energy generated after a deflagration.

(8) The displacement of the connecting rod 12 of the present invention is controlled within 30 mm to 80 mm, preferably 50 mm to 60 mm, because an excessive displacement cannot reduce the recoil force. However, if the displacement is too small, the kinetic energy cannot be consumed thoroughly and the cylinder cover component is very likely to get rid of the blockage of the limiting device 14. Once the cylinder cover component is separated from the cylinder body, a powerful recoil force will be generated. However, the displacement of the connecting rod 12 may be adjusted appropriately according to a specific application environment as long as an optimal explosion venting effect can be achieved.

(9) When the grain 7 in the inner cylinder is ignited and released normally, a hot gas is released from the spout of the cylinder cover component 4 without generating a overlarge air stream, then the explosion-venting device 2 will not be started. The connecting rod 12 is fixed on the cylinder body 3 by the clamping claw 17 and will not move axially along the cylinder body 3 to be displaced. Only when an composition is deflagrated accidentally and a powerful hot air stream pushes the cylinder cover component 4 and the connecting rod 12 to move in a direction that the hot air stream is jetting towards, the clamping claw 17 of the limiting device 14 is detached under the action of a powerful impact force on one hand, during which a part of kinetic energy of impact kinetic energy is consumed. Pushed by the hot air stream, the connecting rod 12 drives the guiding ring 15 to slide axially along the outer wall of the cylinder body 3 to be displaced. During the moving process, the friction layer 11 generates a frictional resistance on the guiding ring to consume a part of the impact kinetic energy. When the extremity of the connecting rod 12 reaches the spout of the cylinder body 3, the flanging 16 of the limiting device 14 fixed on the cylinder body 3 prevents the extremity of the connecting rod 12 from being separated from the cylinder body 3. At the moment, the buffer 18 arranged between the flanging 16 and the guiding ring 15 functions to consume a part of the impact kinetic energy with the elasticity of the buffer. In addition, the buffer buffers the powerful impact force between the extremity of the connecting rod 12 and the flanging 16. When the final kinetic energy acts, in the form of collision, on the flanging 16, the flanging 16 is distorted elastically or plastically to consume all remaining kinetic energy. Thus the powerful impact kinetic energy generated by the deflagration of the grain 7 will be consumed or dispersed in the whole process, thus avoiding injuries and damages caused by the powerful impact kinetic energy.

(10) The inner cylinder of the present invention is not limited to the structures in the embodiments above, and is not only applicable to a portable fire extinguishing device or a fixed fire extinguishing device, but also applicable to other devices that involve the problem of pressure venting and explosion prevention.

(11) The invention is not limited to the embodiments illustrated in the drawings. Accordingly it should be understood that where features mentioned in the appended claims are followed by reference numerals, such numerals are included solely for the purpose of enhancing the intelligibility of the claims and are in no way limiting on the scope of the claims.