An incendiary bomb launching system

Abstract

The present invention relates to the technical field of fire extinguishing bomb launching devices, and particularly to a fire extinguishing bomb launching system, which includes a vehicle frame and a launching device installed on the vehicle frame. The launching device includes a bottom plate with adjustable angle arranged on the vehicle frame, at least one gas storage tank and a launching tube arranged on the bottom plate, a piston-type multi-stage high-pressure gas switch installed between the gas storage tank and the launching tube, and a recoil buffer mechanism for buffering the recoil force of the launching tube. When the present invention is in use, the recoil buffer mechanism absorbs the recoil force, greatly reducing the recoil force acting on the reflection device, effectively preventing the recoil force from causing the launching device to move backward and reducing the damage to the launching device; when the air pressure in the gas storage tank reaches 20 MPa to 25 MPa, the piston-type multi-stage high-pressure gas switch can quickly and accurately control the connection and disconnection between the gas storage cylinder and the launching tube, and open instantaneously, with a very fast reaction speed.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing bomb launching devices, and particularly to a fire extinguishing bomb launching system. Background Art

[0002] When the current fire extinguishing bomb launching device launches, high-pressure cold gas is filled into the air storage cylinder. When the pressure in the air storage cylinder reaches the preset value, the inflation of the air storage cylinder is stopped. When a fire extinguishing bomb needs to be launched, the air storage cylinder is communicated with the launching tube. The gas in the air storage cylinder enters the control valve through the air inlet and enters the launching tube through the air outlet, so that a high pressure is formed in the launching tube. Under the push of the high-pressure cold gas, the fire extinguishing bomb is ejected from the launching tube to complete the takeoff operation of the fire extinguishing bomb. However, due to the fact that there is a large reaction force on the launching device at the moment when the fire extinguishing bomb is launched, the reaction force will cause the launching device to move backward, posing a safety hazard. At the same time, with the current launching device, as the required launch range is getting farther and farther, and as the range increases, the air pressure in the air storage tank is also constantly increasing. When the air pressure in the air storage tank is greater than 10 Mpa, ordinary solenoid valves often become insensitive to control and sometimes cannot be opened normally, greatly affecting the launch control of the launching device. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems, and provide a system that absorbs the reaction force through a recoil buffer mechanism, greatly reducing the reaction force acting on the launching device, effectively preventing the launching device from moving backward due to the reaction force and reducing damage to the launching device. At the same time, the launch control accuracy of the launching device is improved through a multi-stage gas control switch. When the air pressure in the air storage tank reaches 20 MPa to 25 MPa, the piston-type multi-stage high-pressure gas switch can be instantaneously opened, with a very fast reaction speed, greatly improving the launch control of the launching device.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] A fire extinguishing bomb launching system includes a vehicle frame and a launching device installed on the vehicle frame. The launching device includes a bottom plate with an adjustable angle installed on the vehicle frame, at least one air storage tank and a launching tube arranged on the bottom plate, a piston-type multi-stage high-pressure gas switch installed between the air storage tank and the launching tube, and a recoil buffer mechanism for buffering the reaction force of the launching tube.

[0006] A slide plate is slidably mounted on the bottom plate, and the launch tube is fixedly mounted on the slide plate. The recoil buffer mechanism includes two symmetrically arranged supports, a piston rod horizontally arranged between the two supports, and a cylinder body slidably sleeved on the piston rod in a matching manner. A slider is arranged between the piston rod and the inner cavity of the cylinder body in a matching manner. The slider divides the inner cavity of the cylinder body into a left cavity and a right cavity. A sealed cavity is arranged in the right cavity, and the size of the sealed cavity changes with the movement of the cylinder body. A buffer mechanism is arranged between the left cavity and the right cavity. The buffer mechanism enables the liquid in the cylinder body to flow quickly from the left cavity to the right cavity and slowly from the right cavity to the left cavity. The cylinder body is fixedly mounted below the slide plate, and the two supports are fixedly mounted on the bottom plate.

[0007] The buffer mechanism includes joints respectively connected to the left cavity and the right cavity, and a one-way valve arranged between the two joints. The one-way valve includes a large channel and a small channel. When the hydraulic oil in the left cavity flows to the right cavity, the large channel is opened and the small channel is closed. When the hydraulic oil in the right cavity flows to the left cavity, the large channel is opened and the small channel is closed.

[0008] The piston-type multi-stage high-pressure gas switch includes a valve body, a valve core slidably arranged in the valve body in a matching manner, and a valve cover fixedly arranged above the valve body. The valve core is hermetically matched with the inner wall of the valve body. An upper valve cavity is arranged at the upper end of the valve core. A multi-stage gas control switch for communicating the upper valve cavity and controlling the pressure relief of the upper valve cavity is connected to the valve cover. The multi-stage gas control switch includes a connecting body fixedly connected to the upper end of the valve cover, a piston slidably arranged in the connecting body in a matching manner, and a solenoid valve arranged at the upper end of the connecting body. A vent hole is arranged on the valve cover, and the vent hole is communicated with the upper valve cavity. A large-hole air release valve is installed on the valve cover. The piston controls the communication between the large-hole air release valve and the vent hole. The solenoid valve controls the communication and disconnection between the multi-stage gas control switch and the atmosphere. A piston hole is opened at the lower end of the connecting body, and the piston is slidably arranged in the piston hole in a matching manner. A stepped blind hole two is arranged at the upper end of the piston. An elastic member two for piston reset is arranged between the stepped blind hole two and the upper end of the connecting body. An L-shaped air hole is arranged at the lower end of the piston. The lower end of the L-shaped air hole is communicated with the upper air passage. The L-shaped air hole is communicated with the stepped blind hole two. An air outlet one and an air outlet two are longitudinally arranged at the upper end of the connecting body. The air outlet one is communicated with the stepped blind hole two. The electromagnetic armature of the solenoid valve is used to control the opening and closing of the air outlet two. When the air outlet two is opened, the air outlet one and the air outlet two are communicated. A ring of protrusions 26 is arranged at the upper end of the valve cover 3.

[0009] The valve core is a stepped shaft, the diameter of the upper valve core is larger, and the diameter of the lower valve core is smaller, there is a gap between the lower valve core and the inner wall of the upper air passage, a blind hole is provided at the upper end of the valve core, an elastic component for resetting the valve core is provided between the blind hole and the valve cover, a through hole is transversely provided on the side wall of the lower valve core, the through hole is connected to the blind hole, a longitudinal air passage is provided in the valve body, and an air inlet connected to the air passage is provided on the middle side wall of the valve body The air inlet is connected to the air storage tank, the valve core is matched and slidably arranged in the air passage, the air passage is stepped, the diameters of the upper air passage and the lower air passage are larger, and the diameter of the middle air passage is smaller, the valve core is matched and slidably arranged in the upper air passage, the air inlet is arranged on the side wall of the valve body where the upper air passage is located, and an upwardly protruding annular convex edge is arranged on the stepped surface of the upper end of the middle air passage, and the convex edge is used to separate the lower air passage and the air inlet when it is tightly matched with the lower end of the valve core.

[0010] There are two gas storage tanks.

[0011] Support mechanisms are symmetrically arranged on both sides of the rear end of the frame.

[0012] The support mechanism includes a connecting plate rotatably mounted on the frame, a support rod hinged to the connecting plate at the upper end, and a support plate connected to the rear end of the support rod. The support plate is an L-shaped plate. Fixing holes are provided on both sides of the hinge point of the connecting plate and the support rod, a hole is provided at the corresponding position of the support rod, and a fixing rod for fixing the support rod is matched in one of the fixing holes.

[0013] The rear end of the bottom plate is hinged on the vehicle frame, and a lifting component is arranged between the lower surface of the front end of the bottom plate and the vehicle frame.

[0014] The lifting components are two cylinders symmetrically arranged between the base plate and the bracket, the fixed ends of the two cylinders are connected to the frame, and the movable ends of the two cylinders are connected to the base plate.

[0015] The gain effect of the present invention is:

[0016] When the present invention is in use, the recoil buffer mechanism absorbs the recoil force, greatly reducing the recoil force acting on the reflection device, effectively preventing the recoil force from causing the launching device to move backward and reducing the damage to the launching device; at the same time, the multi-stage gas control switch improves the launching control accuracy of the control valve for the launching device. When the air pressure in the gas storage tank reaches 20 MPa to 25 MPa, the piston-type multi-stage high-pressure gas switch can quickly and accurately control the connection and disconnection between the gas storage cylinder and the launching cylinder, open instantly, and the reaction speed is very fast. The piston-type multi-stage high-pressure gas switch can effectively control the launching of the fire extinguishing bomb, greatly improving the launching control of the launching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention.

[0018] Figure 2 is Figure 1 the front view of.

[0019] Figure 3 is a schematic structural diagram of the recoil buffer mechanism of the present invention.

[0020] Figure 4 is Figure 3 the top view of.

[0021] Figure 5 is a schematic structural diagram of the piston-type multi-stage high-pressure gas switch of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following will make a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.

[0023] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5, Serial numbers in the figure: 1 is the vehicle frame, 2 is the bottom plate, 3 is the air storage tank, 4 is the launch tube, 5 is the piston-type multi-stage high-pressure gas switch, 6 is the recoil buffer mechanism, 7 is the connecting plate, 8 is the support rod, 9 is the support plate, 10 is the fixing hole, 11 is the cylinder, 12 is the base, 501 is the valve body, 502 is the valve core, 503 is the valve cover, 504 is the upper valve cavity, 505 is the air passage, 506 is the air inlet, 507 is the flange, 508 is the groove, 509 is the first sealing gasket, 5010 is the pressing plate, 5011 is the first blind hole, 5012 is the first spring, 5013 is the connecting body, 5014 is the piston, 5015 is the solenoid valve, 5016 is the vent hole, 5017 is the piston hole, 5018 is the L-shaped air hole, 5019 is the stepped second blind hole, 5020 is the first air outlet, 5021 is the second air outlet, 5022 is the second spring, 5023 is the electromagnetic armature, 5024 is the large-hole air release valve, 5025 is the first through hole, 5026 is the protrusion, 5027 is the upper cavity, 5028 is the fourth sealing ring, 601 is the support, 602 is the piston rod, 603 is the cylinder block, 604 is the slider, 605 is the left cavity, 606 is the right cavity, 607 is the sealed cavity, 608 is the joint, 609 is the one-way valve, 6010 is the spacer ring, 6011 is the first sealing ring, 6012 is the left end cover, 6013 is the right end cover, 6014 is the cylinder body, 6015 is the second sealing ring, 6016 is the third sealing ring, 6017 is the wear-resistant ring, 6018 is the dust-proof ring.

[0024] A fire extinguishing bomb launch system of the present invention includes a vehicle frame 1 and a launch device installed on the vehicle frame 1. The launch device includes a bottom plate 2 with an adjustable angle installed on the vehicle frame 1, two air storage tanks 3 and a launch tube 4 arranged on the bottom plate 2, a piston-type multi-stage high-pressure gas switch 5 installed between the air storage tank 3 and the launch tube 4, and a recoil buffer mechanism 6 for buffering the rebounding force of the launch tube 4.

[0025] In this embodiment, bases 12 are symmetrically arranged on both sides of the rear end of the vehicle frame 1. The rear end of the bottom plate 2 is hinged between the two bases 12. Two slide rails are longitudinally and symmetrically fixedly installed on the bases 12. A slide plate is slidably installed between the two slide rails in a matching manner. A launch tube 4 is fixedly installed in the middle of the slide plate. Two air storage tanks 3 are symmetrically arranged on both sides of the launch tube 4. Both of the two air storage tanks 3 are connected to the air inlet 506 of the piston-type multi-stage high-pressure gas switch 5. The air outlet of the piston-type multi-stage high-pressure gas switch 5 is connected to the launch tube 4. A recoil buffer structure is installed below the slide plate.

[0026] In this embodiment, the recoil buffer mechanism 6 includes two supports 601 fixedly installed symmetrically front and back on the base plate 2. A piston rod 602 is horizontally installed between the two supports 601. The two ends of the piston rod 602 are respectively fixedly installed with the corresponding side supports 601. A cylinder block 603 is slidably sleeved on the piston rod 602 in a matching manner. The cylinder block 603 is fixedly installed below the slide plate. A slider 604 is fixedly arranged in the middle of the piston rod 602. The slider 604 divides the inner cavity of the cylinder block 603 into a left cavity 605 and a right cavity 606. High-temperature and high-pressure hydraulic oil is filled in both the left cavity 605 and the right cavity 606. A sealed cavity 607 is provided in the right cavity 606. Inert gas is filled in the sealed cavity 607. The space size of the sealed cavity 607 changes as the cylinder block 603 moves. A buffer mechanism is provided between the left cavity 605 and the right cavity 606. The buffer mechanism enables the high-temperature and high-pressure hydraulic oil in the cylinder block 603 to flow quickly from the left cavity 605 to the right cavity 606 and slowly from the right cavity 606 to the left cavity 605. The buffer mechanism includes joints 608 respectively connected to the left cavity 605 and the right cavity 606. A pipeline is connected between the two joints 608. A one-way valve 609 is installed on the pipeline. A valve is provided on the one-way valve 609. A large channel and a small channel are provided in the one-way valve 609. Through the control of the valve, when the cylinder block 603 moves backward along the piston rod 602, the large channel of the one-way valve 609 is opened and the small channel is closed. The high-temperature and high-pressure hydraulic oil flows from the left cavity 605 to the right cavity 606 through the large channel, enabling the cylinder block 603 and the slide plate to move backward quickly and absorb the rebound force. After the high-temperature and high-pressure hydraulic oil flows into the right cavity 606, it squeezes the sealed cavity 607, and the volume of the sealed cavity 607 becomes smaller, and the air pressure in the sealed cavity 607 increases; when the backward movement of the cylinder block 603 and the slide plate stops and the high-temperature and high-pressure hydraulic oil stops flowing from the left cavity 605 to the right cavity 606, the high-temperature and high-pressure hydraulic oil in the cavity will be unloaded. Under the action of the air pressure in the sealed cavity 607, the space of the sealed cavity 607 becomes larger, applying a rightward thrust to the high-temperature and high-pressure hydraulic oil in the right cavity 606. At this time, through the valve, the large channel of the one-way valve 609 is closed and the small channel is opened. The high-temperature and high-pressure hydraulic oil in the right cavity 606 slowly flows from the right cavity 606 to the left cavity 605 through the small channel, driving the cylinder block 603 and the slide plate to move forward slowly, enabling the cylinder block 603 and the slide plate to return to their original positions slowly. A spacer ring 6010 is provided in the right cavity 606. The spacer ring 6010 is slidably arranged in the right cavity 606. The spacer ring 6010 and the slider 604 form the sealed cavity 607. Inert gas is filled in the sealed cavity 607.

[0027] There are two grooves on the slider 604, and a wear-resistant ring 6017 and a first sealing ring 6011 are arranged in the two grooves in a matching manner. The first sealing ring 6011 is a Gleitring, and its material is fluororubber and polytetrafluoroethylene. The Gleitring is a combined sealing ring, whose outer layer is a sealing ring filled with polytetrafluoroethylene material, and its inner layer is a sealing ring made of fluororubber material. This combined sealing ring is both wear-resistant and does not lose elasticity, has stable working performance and a long service life, effectively avoiding the leakage of inert gas in the sealed cavity 607 due to the change of the performance of the sealing ring. The material of the wear-resistant ring 6017 is polytetrafluoroethylene. The wear-resistant ring 6017 made of this material has the characteristics of being acid and alkali resistant, resistant to various organic solvents, good corrosion resistance, low friction coefficient and wear resistance. At the same time, by arranging the wear-resistant ring 6017 between the cylinder block 603 and the piston rod 602, when the cylinder block 603 moves back and forth, the contact between the slider 604 and the cylinder block 603 is reduced, effectively avoiding the wear of the cylinder block 603 and the slider 604. The cylinder block 603 includes a left end cover 6012 and a right end cover 6013 arranged symmetrically, and a cylinder body 6014 arranged horizontally between the left end cover 6012 and the right end cover 6013. The left end cover 6012 and the right end cover 6013 are fixedly installed on the left side and the right side of the cylinder body 6014 through bolts, which is convenient for maintenance when the cylinder block 603 and the piston rod 602 fail. Dust-proof rings 6018 are arranged between the left end cover 6012 and the right end cover 6013 and the piston rod 6022. The dust-proof rings 6018 effectively prevent external dust and impurities from entering the cylinder block 603 and polluting the internal high-temperature and high-pressure hydraulic oil, and effectively prevent impurities from blocking the pipeline and the one-way valve 609 when the high-temperature and high-pressure hydraulic oil flows between the left cavity 605 and the right cavity 606, so that the present invention cannot work properly; A second sealing ring 6015 is arranged between the left end cover 6012 and the piston rod 602. The material of the second sealing ring 6015 is fluororubber and polytetrafluoroethylene. A second sealing ring 6015 is arranged between the right end cover 6013 and the piston rod 602. The second sealing ring 6015 realizes the sealing between the left end cover 6012 and the piston rod 602, and between the right end cover 6013 and the piston rod 602, preventing the leakage of high-temperature and high-pressure hydraulic oil in the left cavity 605 and the right cavity 606, and also preventing external pollutants from entering the left cavity 605 and the right cavity 606 and polluting the high-temperature and high-pressure hydraulic oil. Sealing rings three 6016 are arranged between the left end cover 6012 and the right end cover 6013 and the cylinder body 6014 respectively. The sealing rings three 6016 are O-ring seals, and the material is fluororubber. The sealing rings three 6016 realize the sealing between the left end cover 6012 and the cylinder body 6014, and between the right end cover 6013 and the cylinder body 6014, preventing the leakage of high-temperature and high-pressure hydraulic oil in the left cavity 605 and the right cavity 606, and also preventing external pollutants from entering the left cavity 605 and the right cavity 606. At the same time, the material of the O-ring seal is fluororubber, which has corrosion resistance.

[0028] In this embodiment, the piston-type multi-stage high-pressure gas switch 5 includes a valve body 501, a valve cover 503 fixedly installed on the valve body 501 by bolts, a valve core 502 slidably arranged in the valve body 501, the valve core 502 and the inner wall of the valve body 501 are sealed, and an upper valve cavity 504 is provided at the upper end of the valve core 502. The valve cover 503 is connected with a multi-stage gas control switch that communicates with the upper valve cavity 504 and controls the pressure relief of the upper valve cavity 504. An air passage 505 is longitudinally opened in the valve body 5011, and the air passage 505 is stepped, with the smallest diameter in the middle, the largest diameter in the lower end, and the smallest diameter in the upper end. The diameter of the lower air passage is equal to that of the lower air passage, but the diameter of the upper air passage is greater than that of the middle air passage. An air inlet 506 is transversely provided on the side wall of the valve body 1 of the upper air passage. One end of the air inlet 506 is connected to the air storage tank of the launch device. The valve core 502 is a stepped shaft. The diameter of the upper valve core is larger and the diameter of the lower valve core is smaller. The valve core 502 is slidably arranged in the upper air passage. The upper valve core and the inner wall of the valve body corresponding to the upper air passage are sealed and matched. There is a gap between the lower valve core and the inner wall of the valve body corresponding to the upper air passage. The other end of the air inlet 506 and the gap between the lower valve core and the inner wall of the valve body corresponding to the upper air passage are equal to each other. The upper end of the valve core 502 is provided with a blind hole 5011, and an elastic component 1 for resetting the valve core 502 is arranged between the blind hole 5011 and the valve cover. The elastic component 1 is always in a compressed state. The elastic component 1 is a spring 5012, and the spring 5012 is always in a compressed state. The elastic force of the spring 5012 on the piston is much smaller than the force of the air pressure on the valve core. A through hole 5025 is horizontally arranged on the side wall of the lower end valve core. The through hole 5025 is connected with the blind hole 5011, and the through hole 5025 and the gap between the lower end valve core and the inner wall of the valve body corresponding to the upper end air passage are also connected. At the same time, the horizontal The cross-sectional area is larger than the area difference of the cross-sectional area of ​​the upper valve core minus the cross-sectional area of ​​the lower valve core. A circle of convex edges 507 protruding upward is arranged on the stepped surface at the upper end of the middle air passage, and a groove 508 is provided on the lower end surface of the valve core. A sealing gasket 509 is matched and installed in the groove 508. A pressing plate 5010 for fixing the sealing gasket 509 is arranged below the sealing gasket 509. The pressing plate 5010 fixes the sealing gasket 509 on the lower end surface of the valve core 502 by bolts. The convex edge 507 is used to separate the lower end air passage and the air inlet 506 when it is sealed with the lower end of the valve core 502. The cross-sectional area of ​​the convex edge 507 is arc-shaped.

[0029] The described multi-stage gas control switch includes a connecting body 5013 fixedly connected to the upper end of the valve cover 503 by bolts, a piston 5014 slidably arranged in the connecting body 5013 in a matching manner, and a solenoid valve 5015 arranged at the upper end of the connecting body 5013. An air vent 5016 is arranged on the valve cover 503, and the lower end of the air vent 5016 is communicated with the upper valve cavity 504. A piston hole 5017 is opened at the lower end of the connecting body 5013, and the piston 5014 is slidably arranged in the piston hole 5017 in a matching manner. The outer wall of the piston 5014 and the inner wall of the connecting body 5013 are in sealing cooperation. The piston 5014 is stepped, and the diameter of the upper piston is larger than that of the lower piston. The outer wall of the upper piston and the inner wall of the connecting body 5013 are in sealing cooperation, and there is a gap between the outer wall of the lower piston and the inner wall of the connecting body 5013. A protrusion 5026 is arranged at the upper end of the valve cover 503, and a large-hole air release valve 5024 is installed on the valve cover 503. The piston 5014 controls the communication between the large-hole air release valve 5024 and the air vent 5016 on the valve cover. A hole communicated with the large-hole air release valve 5024 is vertically arranged downward at the position of the valve cover 503 in the middle of the protrusion. When the protrusion 5026 and the lower piston are in close cooperation, the large-hole air release valve 5024 is not communicated with the air vent 5016. When the piston 5014 moves upward, the protrusion 5026 and the lower piston are separated, and the large-hole air release valve 5024 is communicated with the air vent 5016. A stepped blind hole two 5019 is arranged at the upper end of the piston 5017. An elastic member two for resetting the piston 5014 is arranged between the stepped blind hole two 5019 and the upper end of the connecting body 5013. The elastic member two is always in a compressed state. The elastic member two is a spring two 5022, and the lower end of the spring two 5022 abuts against the step of the stepped blind hole two 5019. The spring two 5022 is always in a compressed state, and the downward elastic force of the spring two on the piston 5014 is much smaller than the acting force of the air pressure on the piston 5014. The cross-sectional area of the stepped blind hole two 5019 is larger than the area difference between the cross-sectional area of the upper piston and the cross-sectional area of the lower piston. An L-shaped air hole 5018 is opened at the lower end of the piston 5014. The lower end of the L-shaped air hole 5018 is communicated with the upper valve cavity 504 through the air vent 5016, and the upper end of the L-shaped air hole 5018 is communicated with the stepped blind hole two 5019. An air outlet one 5020 and an air outlet two 5021 are longitudinally arranged at the upper end of the connecting body 5013. The lower end of the air outlet one 5020 is communicated with the stepped blind hole two 5019. An upper cavity 5027 is arranged at the upper end of the connecting body 5013. The upper end of the air outlet one 5020 is communicated with the upper cavity 5027. The solenoid valve 5015 is installed on the upper cavity 5027. The electromagnetic armature 5023 of the solenoid valve 5015 is used to control the connection between the air outlet two 5021 and the upper cavity 5027. When the solenoid valve 5015 is opened, the electromagnetic armature 5023 moves upward, and the air outlet two 5021 and the air outlet one 5020 are communicated through the upper cavity 5027.The other end of the second air outlet 5021 is connected to the atmosphere.

[0030] Three grooves are provided on the outer wall of the upper valve core 502. Guide belts are arranged in a matching manner in the upper groove and the lower groove, and a fourth sealing ring 5028 is arranged in the middle groove to play a role in gas sealing. The fourth sealing ring 5028 makes the sealing fit effect between the upper valve core 502 and the inner wall of the corresponding valve body 501 of the upper air passage 505 better.

[0031] Two grooves are provided on the outer wall of the piston 5014. Guide belts are arranged in a matching manner in the two grooves. A large-hole air release valve 5024 is installed on the valve cover 503, and a silencing mechanism and a dust-proof mechanism are installed at the same time. The large-hole air release valve 5024 has a silencing function at the same time, can eliminate noise, prevent excessive noise, and prevent dust from entering the air passage, avoiding air passage blockage or unsmooth gas flow.

[0032] In this embodiment, the rear end of the bottom plate 2 is hinged between two bases 12, and two cylinders 11 are arranged between the front end of the bottom plate 2 and the vehicle frame 1. The two cylinders 11 act synchronously. The moving ends of the two cylinders 11 are both hinged to the lower surface of the bottom plate 2, and the fixed ends of the two cylinders 11 are both hinged to the vehicle frame 1.

[0033] In this embodiment, support mechanisms are symmetrically arranged on both sides of the rear end of the vehicle frame 1. The support mechanism includes a connecting disk 7 rotatably installed on the vehicle frame 1. A groove is provided on the outer side of the connecting disk 7. A support rod 8 is hinged and installed in the groove. A support plate 9 is installed at the rear end of the support rod 8. When support is needed, the support plate 9 contacts the ground. When a backward thrust is applied to the present invention by the rebounding force, the support mechanism plays a supporting role for the present invention. The support plate 9 is L-shaped. When supporting, the opening of the support plate 9 faces backward. A reinforcing rib is arranged in the middle of the support plate 9. At the same time, fixing holes 10 are provided on both sides of the hinge point of the connecting disk 7 and the support rod 8. When supporting, the support rod 8 is rotated to a suitable position, and then the fixing rod is inserted into the fixing hole 10 located behind the hinge point of the connecting disk 7 and the support rod 8 to prevent the support rod 8 from rotating. During the transportation of the present invention, the support rod 8 can be retracted forward, and the fixing rod is inserted into the fixing hole 10 located in front of the hinge point of the connecting disk 7 and the support rod 8 and passes through the corresponding hole on the support rod 8 to prevent the support rod 8 from rotating and hurting people during transportation.

[0034] Working process: When the solenoid valve is opened, the electromagnetic armature 5023 moves upward, and at the same time, the large-hole air release valve 5024 is opened. The second air outlet 5021 and the first air outlet 5020 are connected through the upper cavity 5027. Since the other end of the second air outlet 5021 is connected to the atmosphere, the first air outlet 5020 and the stepped blind hole two 5019 are also connected to the atmosphere, and the gas in the stepped blind hole two 5019 is discharged. At this time, the piston is only subjected to the upward force of the air pressure in the lower cavity of the piston. Under the action of the air pressure in the lower cavity of the piston, the piston quickly moves upward, and the lower piston is separated from the protrusion 5026. The ventilation hole 5016 is connected to the large-hole air release valve 5024, and the gas in the upper valve cavity 504 quickly passes through the hole vertically arranged in the middle of the protrusion of the valve cover 503 and is connected to the large-hole air release valve 5024, and the gas in the upper valve cavity 504 quickly discharges through the large-hole air release valve 5024. At the same time, the gas in the upper valve cavity 504 is discharged to the atmosphere in turn through the ventilation hole 5016 provided on the valve cover, the L-shaped air hole 5018 on the piston, the stepped blind hole two 5019, the first air outlet 5020, the upper cavity 5027, and the second air outlet 5021. The air pressures in the upper valve cavity 504 and the blind hole one 5011 are relieved. At this time, the valve core 502 is only subjected to an upward force of the air pressure in the lower cavity of the valve core on the valve core 502. This force is much greater than the downward elastic force of the first spring 5012 on the valve core 502, and the valve core 502 quickly moves upward, and the lower valve core is separated from the convex edge 507, so that the lower ventilation passage is connected to the air inlet 6, and the gas in the gas storage tank 3 is transported into the launch tube 4, and the fire extinguishing bomb is launched. After being launched, the launch tube 4 receives a backward rebounding force, and the rebounding force drives the slide plate and the launch tube 4 to move backward. Through the valve, the large passage of the one-way valve 609 is opened, and the small passage is closed. The slide plate drives the cylinder block 603 to quickly move to the rear end of the piston rod 602. At the same time, the high-temperature and high-pressure hydraulic oil in the cylinder block 603 quickly flows from the left cavity 605 to the right cavity 606, and the rebounding force is absorbed, greatly reducing the rebounding force acting on the reflection device, effectively preventing the rebounding force from causing the launch device to move backward and reducing the damage to the launch device; during the process of the slide plate driving the cylinder block 603 to slide backward along the piston rod 602, the volume of the closed cavity 607 becomes smaller, and the gas in the closed cavity 607 is compressed, and the air pressure increases. When the cylinder block 603 stops moving to the right end of the piston rod 602, under the action of the air pressure of the gas in the closed cavity 607, the volume of the closed cavity 607 increases, and the high-temperature and high-pressure hydraulic oil in the right cavity 606 is slowly pushed into the left cavity 605 through the buffer mechanism, driving the cylinder block 603 to slowly move to the left along the piston rod 602, and the cylinder block 603 drives the slide plate to slowly reset

[0035] When the solenoid valve 5015 closes after the launch is completed, the large orifice bleed valve 5024 closes, and the electromagnetic armature is located below. At this time, the air inlet 506 and the cavity between the lower valve core and the inner wall of the corresponding valve body of the upper air passage are both connected to the atmosphere. The valve core 502 no longer receives an upward force on the valve core 502 from the initial stage in the gap between the lower valve core and the inner wall of the corresponding valve body of the upper air passage. At this time, the elastic force of the first spring 5012 causes the valve core 502 to move downward and abut against the convex edge 507, so that the lower air passage and the air inlet 506 are not connected, and the gas in the gas storage tank is not transported into the launch tube. The gas in the gas storage tank enters the first blind hole 5011 through the air inlet 506, the gap between the lower valve core and the inner wall of the corresponding valve body of the upper air passage, and the first through hole 5025. At this time, the air pressure in the upper cavity of the valve core is equal to the air pressure in the lower cavity of the valve core. However, the force-bearing area of the upper valve core is larger than the force-bearing area of the lower valve core. Therefore, the downward force of the air pressure on the valve core is greater than the upward force of the air pressure on the valve core. The valve core 502 is generally subject to a downward force from the air pressure on it. Coupled with the downward elastic force of the first spring 5012, the lower valve core tightly abuts against the convex edge 507. Since the electromagnetic armature is located below, one end of the second air outlet 5021 is blocked, so that the first air outlet 5020 and the second air outlet 5021 are not connected. At this time, the gas in the first air outlet 5020 is not discharged into the atmosphere. The air pressure in the upper cavity of the piston is equal to the air pressure in the lower cavity of the piston. At this time, the force-bearing area of the upper end of the piston is equal to the force-bearing area of the lower end of the piston. At this time, under the downward elastic force of the second spring on the piston 5014, the piston moves downward until it abuts against the protrusion 5026, and the large orifice bleed valve 5024 is not connected to the vent hole 5016. Since the air pressure in the upper cavity of the piston is equal to the air pressure in the lower cavity of the piston, but after the lower end of the piston abuts against the protrusion 5026, the force-bearing area of the upper end of the piston is larger than the force-bearing area of the lower end of the piston. Therefore, the downward force of the air pressure on the piston is greater than the upward force of the air pressure on the piston. The piston is generally subject to a downward force from the air pressure on it, causing the piston to tightly abut against the protrusion 5026.

[0036] The present invention forms a three-stage buffer through the solenoid valve 5015, the valve core 502 and the piston 5014. When the air pressure in the gas storage tank reaches 20 MPa to 25 MPa, the piston-type multi-stage high-pressure gas switch can quickly and accurately control the connection and disconnection between the gas storage cylinder and the launch tube, open instantaneously, and has a very fast reaction speed. The piston-type multi-stage high-pressure gas switch can effectively control the launch of the fire extinguishing bomb, greatly improving the launch control of the launch device.

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire extinguishing bomb launching system, comprising a vehicle frame and a launching device mounted on the vehicle frame, characterized in that: The launching device comprises a base plate with an adjustable angle arranged on the frame, at least one gas storage tank and a launching tube arranged on the base plate, a piston-type multi-stage high-pressure gas switch installed between the gas storage tank and the launching tube, and a recoil buffer mechanism for buffering the rebound force of the launching tube. The piston-type multi-stage high-pressure gas switch comprises a valve body, a valve core slidingly arranged in the valve body, and a valve cover fixedly arranged above the valve body. The valve core is a stepped shaft, the diameter of the upper valve core is larger, and the diameter of the lower valve core is smaller. There is a gap between the lower valve core and the inner wall of the upper air passage. A blind hole is opened at the upper end of the valve core, and an elastic component for resetting the valve core is arranged between the blind hole and the valve cover. A through hole is transversely arranged on the side wall of the lower valve core. The vent is connected with a blind hole, and an air passage is longitudinally provided in the valve body. An air inlet connected with the air passage is provided on the middle side wall of the valve body. The air inlet is connected with the air tank. The valve core is matched and slidably arranged in the air passage. The air passage is stepped. The diameters of the upper air passage and the lower air passage are larger, and the diameter of the middle air passage is smaller. The valve core is matched and slidably arranged in the upper air passage. The air inlet is arranged on the side wall of the valve body where the upper air passage is located. An upwardly protruding annular convex edge is provided on the stepped surface of the upper end of the middle air passage. The convex edge is used to separate the lower air passage and the air inlet when it is tightly matched with the lower end of the valve core; support mechanisms are symmetrically arranged on both sides of the rear end of the frame; there are two air tanks.

2. The fire extinguishing bomb launching system according to claim 1, characterized in that: A slide plate is slidably mounted on the base plate, the launching tube is fixedly mounted on the slide plate, the recoil buffer mechanism comprises two symmetrically arranged supports, a piston rod transversely arranged between the two supports, and a cylinder body slidably sleeved on the piston rod, a slider is matched and arranged between the piston rod and the inner cavity of the cylinder body, the slider divides the inner cavity of the cylinder body into a left cavity and a right cavity, a closed cavity is arranged in the right cavity, the size of the closed cavity changes with the movement of the cylinder body, a buffer mechanism is arranged between the left cavity and the right cavity, the buffer mechanism enables the liquid in the cylinder body to flow quickly from the left cavity to the right cavity and slowly from the right cavity to the left cavity, the cylinder body is fixedly mounted below the slide plate, and the two supports are fixedly mounted on the base plate.

3. The fire extinguishing bomb launching system according to claim 2, characterized in that: The buffer mechanism includes joints respectively connecting the left cavity and the right cavity, and a one-way valve arranged between the two joints. The one-way valve includes a large channel and a small channel. When the hydraulic oil of the left cavity flows to the right cavity, the large channel opens and the small channel closes. When the hydraulic oil of the right cavity flows to the left cavity, the large channel opens and the small channel closes.

4. The fire extinguishing bomb launching system according to claim 1, characterized in that: The described valve core is in sealing cooperation with the inner wall of the valve body. An upper valve cavity is provided at the upper end of the valve core. A multi-stage gas control switch for connecting the upper valve cavity and controlling the pressure relief of the upper valve cavity is connected to the valve cover. The multi-stage gas control switch includes a connecting body fixedly connected to the upper end of the valve cover, a piston slidably arranged in the connecting body in a matching manner, and a solenoid valve arranged at the upper end of the connecting body. An air vent is provided on the valve cover, and the air vent is communicated with the upper valve cavity. A large-hole air release valve is installed on the valve cover. The piston controls the connection between the large-hole air release valve and the air vent. The solenoid valve controls the connection and disconnection between the multi-stage gas control switch and the atmosphere. A piston hole is opened at the lower end of the connecting body, and the piston is slidably arranged in the piston hole in a matching manner. A stepped blind hole two is provided at the upper end of the piston. An elastic component two for piston reset is arranged between the stepped blind hole two and the upper end of the connecting body. An L-shaped air hole is provided at the lower end of the piston. The lower end of the L-shaped air hole is communicated with the upper air passage. The L-shaped air hole is communicated with the stepped blind hole two. An air outlet one and an air outlet two are longitudinally arranged at the upper end of the connecting body. The air outlet one is communicated with the stepped blind hole two. The electromagnetic armature of the solenoid valve is used to control the switch of the air outlet two. When the air outlet two is opened, the air outlet one and the air outlet two are communicated. A circular protrusion is provided at the upper end of the valve cover.

5. The fire extinguishing bomb launching system according to claim 1, characterized in that: The described support mechanism includes a connecting disk rotatably installed on the vehicle frame, a support rod with its upper end hinged to the connecting disk, and a support plate connected to the rear end of the support rod. The support plate is an L-shaped plate. Fixing holes are provided on both sides of the hinge point of the connecting disk and the support rod. A hole is provided at the corresponding position of the support rod. A fixing rod for fixing the support rod is arranged in a fixing hole in a matching manner.

6. The fire extinguishing bomb launching system according to claim 1, characterized in that: The rear end of the described bottom plate is hinged to the vehicle frame. A lifting component is arranged between the lower surface of the front end of the bottom plate and the vehicle frame.

7. The fire extinguishing bomb launching system according to claim 6, characterized in that: The described lifting component is two cylinders symmetrically arranged between the bottom plate and the support. The fixed ends of the two cylinders are connected to the vehicle frame, and the moving ends of the two cylinders are connected to the bottom plate.

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