A multifunctional pneumatic throwing device

Abstract

The present invention relates to the technical field of rope-carrying launchers, and in particular to a multifunctional pneumatic thrower. A multifunctional pneumatic thrower comprises an air cylinder, a hand support assembly and a gas cylinder. The air cylinder comprises a cylinder body and a piston assembly located in the cylinder body. One end of the cylinder body is an open end. An abutment sealing ring is formed in the cylinder body near the open end. A center box is fixed in the compressed air storage area. A center cavity is formed inside the center box. An air outlet pipe is passed through the center box. The air outlet pipe port is provided with a rubber plug for controlling the opening and closing of the air outlet pipe port. A through hole is provided on the side of the center box facing the abutment sealing ring: the piston assembly comprises a piston rod and a first piston and a second piston connected at both ends of the piston rod. The second piston is located in the center cavity. When the first piston abuts against the abutment sealing ring, a distance is left between the second piston and the inner side wall of the center box. The cross-sectional area of ​​the second piston is larger than the center area of ​​the abutment sealing ring. The above scheme can achieve long-distance throwing of objects when the air pressure in the cylinder body is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of rope-carrying launchers, in particular to a multifunctional pneumatic throwing device. Background Art

[0002] The multifunctional pneumatic thrower is a device that uses compressed air as power to throw ropes, life buoys and other objects to the target. It is often used in natural disaster rescue work.

[0003] The existing invention patent with application publication number CN104709450A discloses a life-saving multifunctional pneumatic thrower. In this technical solution, a spring is used to provide elastic force to push the piston on the piston rod to squeeze the inner wall of the cylinder port to form a sealing surface to achieve a sealing effect. When an object needs to be launched, the trigger is pressed, and the guide rod mounting seat is connected to the atmosphere. The effective area of ​​the force applied by the compressed air inside the cylinder to the bottom of the piston rod is larger than the effective area of ​​the force applied to the end of the piston. Therefore, the compressed air applies a force to the piston rod, overcoming the pressure of the spring to drive the piston rod to move in the direction of the cylinder, so that the cylinder port is opened, and the compressed air is ejected from the cylinder to launch the object.

[0004] The above-mentioned prior art solution has the following defects: since the piston needs to maintain the open state, the pressure generated by the compressed air on the piston rod must overcome the force exerted by the spring on the piston rod. During the process of compressed air discharge, the air pressure in the cylinder decreases continuously, so the opening amplitude of the piston gradually decreases, resulting in the inability to quickly eject all the compressed air in the cylinder. Therefore, it is necessary to fill the cylinder with high-pressure compressed air to achieve long-distance throwing of objects. Summary of the invention

[0005] The purpose of the invention is to provide a multifunctional pneumatic throwing device, which has the advantage of being able to achieve long-distance throwing with a relatively small air cylinder pressure.

[0006] The above-mentioned inventive object of the present invention is achieved through the following technical solutions: a multifunctional pneumatic throwing device, including an air cylinder, a hand support assembly and a gas cylinder, a compressed air storage area is provided in the air cylinder, the air cylinder includes a cylinder body and a piston assembly located in the cylinder body, one end of the cylinder body is an open end, and an abutment sealing ring is formed in the cylinder body near the open end, a center box is fixedly provided in the compressed air storage area, a center cavity is formed inside the center box, an air outlet pipe connecting the center cavity and the outside atmosphere is passed through the center box, the air outlet pipe port is provided with a rubber plug for controlling the opening and closing of the air outlet pipe port, and a through hole connecting the center cavity and the compressed air storage area is provided on the side of the center box facing the abutment sealing ring: the piston assembly includes a piston rod and a first piston and a second piston connected at both ends of the piston rod, the second piston is located in the center cavity, when the first piston abuts against the abutment sealing ring, a distance is left between the second piston and the inner wall of the center box, and the cross-sectional area of ​​the second piston is larger than the center area of ​​the abutment sealing ring.

[0007] By adopting the above technical solution, the rubber plug is detached, the air outlet pipe is opened, and the compressed air in the central cavity is discharged from the air outlet pipe until the air pressure in the central cavity is the same as the atmospheric pressure. When the air pressure in the central cavity decreases, the force exerted by the air pressure in the compressed air storage area on the second piston increases until the force is greater than the force exerted on the first piston. The piston assembly moves to the right, the first piston separates from the abutting sealing ring, and the compressed air in the compressed air storage area is discharged through the middle of the abutting sealing ring. Since there is no spring to exert force on the piston assembly at this time, the piston assembly gradually closes during the process of reducing air pressure. Therefore, the compressed air in the compressed air storage area can be completely discharged in a short time until the air pressure in the compressed air storage area is equal to the atmospheric pressure. Therefore, objects can be thrown over long distances when the air pressure in the cylinder is relatively low.

[0008] The present invention is further configured as follows: a one-way hole is provided on the central box, and a one-way valve is installed in the one-way hole to control the airflow from the central cavity to the compressed air storage area.

[0009] By adopting the above technical solution, a one-way hole is opened on the central box to install a one-way valve so that the airflow can only flow from the central cavity to the compressed air storage area, so that when inflating, it is only necessary to inflate the central cavity, and the piston assembly is pushed in the direction of the abutting sealing ring until the first piston abuts the abutting sealing ring. When the air pressure in the central cavity reaches the opening pressure of the one-way valve, the air will enter the compressed air storage area from the central cavity, and multiple inflation steps are not required, which is convenient to use.

[0010] The present invention is further configured as follows: a connecting pipe connected to the air cylinder is provided at one end of the cylinder facing away from the sealing ring, a balancing hole connected to the connecting pipe and a compressed air storage area is provided on the surface of the cylinder, a movable air valve is provided in the connecting pipe, and an air nozzle sealing ring which cooperates with the inner wall of the connecting pipe for sealing is provided on the outer wall of the movable air valve; an air nozzle spring is installed between the movable valve and the cylinder, and an air needle is also installed in the connecting pipe, the needle head of the air needle is aligned with the center of the movable valve, and the other end of the air needle passes through the cylinder and extends into the central cavity.

[0011] By adopting the above technical solution, the gas cylinder is filled with compressed air and connected to the connecting pipe. The switch of the gas cylinder is turned on, and the compressed air in the gas cylinder is discharged outward. Under the action of air pressure, the movable valve moves to the left. When the movable valve moves to the left until the air needle passes through the movable valve, the compressed air in the gas cylinder enters the central cavity through the air needle. Until the air pressure on both sides of the movable valve is balanced, the movable valve is reset under the action of the air nozzle spring, and the movable valve is separated from the air needle and sealed, so that the gas cylinder is no longer connected to the central cavity, and the compressed air in the gas cylinder no longer enters the central cavity. However, when the air pressure in the central cavity decreases, the compressed air in the gas cylinder will supply air to the central cavity only after pushing the movable valve to be passed through by the air needle, and this period of time is enough for the piston assembly to open and launch the object.

[0012] The present invention is further configured such that: an outer side of the connecting pipe is formed with an external thread that matches the connecting pipe.

[0013] By adopting the above technical solution, an external thread is formed on the outside of the connecting pipe to stably connect the gas cylinder to the connecting pipe, and the gas cylinder will not be separated from the connecting pipe under the reaction force of the compressed air.

[0014] The present invention is further configured as follows: a piston sealing ring is formed on the side of the first piston facing the abutting sealing ring, and the diameter of the piston sealing ring is larger than the inner diameter of the abutting sealing ring and smaller than the diameter of the second piston.

[0015] By adopting the above technical solution, the piston sealing ring is arranged so that the first piston and the abutting sealing ring can abut against each other to form a circle of sealing surface. The diameter of the piston sealing ring is smaller than the diameter of the second piston, so that the effective area of ​​the compressed air exerting pressure on the second piston is larger than the effective area of ​​the compressed air exerting pressure on the first piston, so that the piston assembly can be opened under the pressure of the compressed air.

[0016] The present invention is further configured as follows: the hand rest assembly includes an operating hand rest fixedly connected to the cylinder body, a trigger is installed in the operating hand rest, the middle part of the trigger is rotatably connected to the operating hand rest, a reset spring is provided between the lower end of the trigger and the operating hand rest, the upper end of the trigger is slidably connected to a slider along the up and down directions, a penetrating rod with a diameter smaller than the inner diameter of the air outlet pipe is rotatably connected to the slider, and the rubber plug is fixedly connected to one end of the penetrating rod passing through the air outlet pipe.

[0017] By adopting the above technical solution, when the trigger is pulled, the rubber plug is detached, the air outlet pipe is opened, and the compressed air in the central cavity is discharged from the air outlet pipe until the air pressure in the central cavity is the same as the atmospheric pressure. When no force is applied to the trigger, the trigger is reset under the action of the spring, and the rubber plug reseals the air outlet pipe.

[0018] The present invention is further configured as follows: a positioning groove is formed on the side surface of the lower end of the trigger, a positioning rod is formed on the operating hand support at a position opposite to the positioning groove, a reset spring is sleeved on the positioning rod, and one end of the reset spring is inserted into the positioning groove.

[0019] By adopting the above technical solution, the reset spring is positioned by the cooperation of the positioning groove and the positioning rod, so that the reset spring is not easy to fall off.

[0020] The present invention is further configured as follows: a launching area is formed in the cylinder on a side of the cylinder abutting against the sealing ring and facing away from the compressed air storage area.

[0021] By adopting the above technical solution, a launching area is set up to install objects to be launched.

[0022] The present invention is further configured to include a throwing assembly, wherein the throwing assembly includes a throwing tube threadedly connected to the cylinder body and a throwing object inserted into the throwing tube.

[0023] By adopting the above technical solution, the cylinder body and the throwing cylinder are threadedly connected so that different throwing cylinders can be replaced as needed.

[0024] The present invention is further configured as follows: a pressure sensor is inserted into the rear end surface of the cylinder and penetrates into the cylinder.

[0025] By adopting the above technical solution, the pressure value in the cylinder is detected by the pressure sensor.

[0026] In summary, the beneficial technical effects of the present invention are:

[0027] 1. After the piston assembly is opened, there is no spring to exert force on the piston assembly so that the piston assembly gradually closes during the process of reducing air pressure. Therefore, the compressed air in the compressed air storage area can be completely discharged in a short time until the air pressure in the compressed air storage area is equal to the atmospheric pressure;

[0028] 2. A one-way valve is set so that the air flow can only flow from the center cavity to the compressed air storage area, so that when inflating, it is only necessary to inflate the center cavity, and the piston assembly is pushed in the direction of the abutment sealing ring until the first piston abuts the abutment sealing ring. When the air pressure in the center cavity reaches the opening pressure of the one-way valve, the air will enter the compressed air storage area from the center cavity. There is no need to perform multiple inflation steps, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic cross-sectional view of an embodiment;

[0030] Figure 2 is a partial cross-sectional schematic diagram of an embodiment;

[0031] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 Is a schematic cross-sectional view of the trigger and the cylinder matching portion of the embodiment;

[0033] Figure 5 This is a schematic diagram of the structure when supporting water rescue bombs, fire extinguishing bombs, anchor hook launching bombs, glass breaking bombs, and training bombs;

[0034] Figure 6 This is a schematic diagram of the structure when equipped with gas reconnaissance bombs.

[0035] Figure numerals: 1, air cylinder; 2, hand support assembly; 3, gas cylinder; 4, cylinder; 5, piston assembly; 6, abutment sealing ring; 7, launching area; 8, compressed air storage area; 9, center box; 10, center cavity; 11, through hole; 12, one-way hole; 13, one-way valve; 14, air outlet pipe; 15, connecting pipe; 16, balance hole; 17, movable valve; 18, air nozzle sealing ring; 19, air nozzle spring; 20, air needle; 21, Piston rod; 22. First piston; 23. Second piston; 24. Piston sealing ring; 25. Operating hand rest; 26. Trigger; 27. Positioning groove; 28. Positioning rod; 29. ​​Return spring; 30. Slider; 31. Through rod; 32. Rubber plug; 33. Throwing tube; 34. Water rescue bomb; 35. Fire extinguishing bomb; 36. Anchor hook launching bomb; 37. Glass breaking bomb; 38. Gas reconnaissance bomb; 39. Training bomb; 40. Pressure sensor. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] like Figure 1 As shown, a multifunctional pneumatic throwing device includes an air cylinder 1, a hand support assembly 2 connected to the air cylinder 1, a gas cylinder 3 for supplying air to the air cylinder 1, and a throwing assembly connected to the air cylinder 1.

[0038] like Figure 2 and Figure 3As shown, the air cylinder 1 includes a cylinder body 4 and a piston assembly 5 located in the cylinder body 4. The cylinder body 4 is cylindrical, and the left end of the cylinder body 4 is an open end. An abutment sealing ring 6 is integrally formed near the left end of the cylinder body 4, and the inside of the cylinder body 4 is divided into a launch area 7 on the left and a compressed air storage area 8 on the right by the abutment sealing ring 6. A center box 9 is fixed in the compressed air storage area 8 through a plurality of connecting columns, and a center cavity 10 is formed in the center box 9. A through hole 11 connected to the compressed air storage area 8 is formed on the left end face of the center box 9, and a one-way hole 12 connected to the compressed air storage area 8 is formed in the middle of the right end face of the center box 9, and a one-way valve 13 is installed in the one-way hole 12, and the one-way valve 13 controls the airflow to flow only from the center cavity 10 to the compressed air storage area 8.

[0039] like Figure 2 and Figure 4 As shown, an air outlet pipe 14 is provided between the lower right end of the center box 9 and the right end of the cylinder 4, and the gas in the center cavity 10 can be directly discharged to the outside through the air outlet pipe 14. Figure 2 and Figure 3 As shown, a connecting tube 15 is formed at the upper position of the right end surface of the cylinder 4, and an external thread is formed on the end of the outer wall of the connecting tube 15 away from the cylinder 4. A balancing hole 16 connected to the inside of the connecting tube 15 is opened on the right end surface of the cylinder 4. A movable air valve 17 sliding along the length direction of the connecting tube 15 is installed on the inner side of the connecting tube 15, and an air valve sealing ring 18 is sleeved on the outer wall of the movable air valve 17. The air valve sealing ring 18 forms a sealing surface between the movable air valve 17 and the connecting tube 15. An air valve spring 19 is installed between the movable air valve 17 and the right end surface of the cylinder 4. An air needle 20 is also installed in the connecting tube 15, and the needle head of the air needle 20 is aligned with the center of the movable air valve 17. The other end of the air needle 20 passes through the cylinder 4 and extends into the central cavity 10. When the movable valve mouth 17 is pushed to the right by the air nozzle spring 19, the air needle 20 is separated from the movable valve mouth 17, and the movable valve mouth 17 is sealed at this time; when the movable valve mouth 17 is pushed to move to the left, the air nozzle spring 19 is compressed, and the air needle 20 passes through the movable valve mouth 17. At this time, the compressed air in the gas cylinder 3 enters the central cavity 10 through the air needle 20.

[0040] like Figure 2As shown, the piston assembly 5 includes a piston rod 21 located in the compressed air storage area 8, and a first piston 22 and a second piston 23 fixed to the piston rod 21. The piston rod 21 passes through the left end surface of the center box 9 and penetrates into the center cavity 10. The first piston 22 is located at the left end of the piston rod 21, and the second piston 23 is located in the center cavity 10 near the right end of the piston rod 21. A piston sealing ring 24 is formed on the left end surface of the first piston 22. The diameter of the piston sealing ring 24 is larger than the inner diameter of the abutting sealing ring 6, and the diameter of the second piston 23 is larger than the diameter of the piston sealing ring 24. When the piston sealing ring 24 and the abutting sealing ring 6 are sealed in a close relationship, a gap is left between the second piston 23 and the left inner wall of the center box 9.

[0041] like Figure 2 and Figure 4 As shown, the hand rest assembly 2 includes an operating hand rest 25 fixedly connected to the barrel 4, a trigger 26 is installed in the operating hand rest 25, and the middle part of the trigger 26 is rotatably connected to the operating hand rest 25. A positioning groove 27 is formed on the right side of the lower end of the trigger 26, and a positioning rod 28 is formed on the operating hand rest 25 at a position opposite to the positioning groove 27. A reset spring 29 is sleeved on the positioning rod 28, and the other end of the reset spring 29 is inserted into the positioning groove 27. A slider 30 is slidably connected to the upper end of the trigger 26 in the up and down directions, and a penetration rod 31 is rotatably connected to the slider 30. The diameter of the penetration rod 31 is smaller than the inner diameter of the outlet pipe 14, and one end of the penetration rod 31 passing through the outlet pipe 14 is fixedly connected to a rubber plug 32 having a diameter larger than the inner diameter of the outlet pipe 14. When the return spring 29 is expanded, the penetration rod 31 is driven to move rightward, and the rubber plug 32 fits on the air outlet pipe 14 to form a sealing surface; when the trigger 26 is pulled to compress the return spring 29, the rubber plug 32 no longer seals the air outlet pipe 14, and the compressed air in the central cavity 10 is discharged from the air outlet pipe 14.

[0042] like Figure 5 and Figure 6 As shown, the throwing assembly includes a throwing tube 33 threadedly connected to the cylinder 4 and a throwing object inserted in the throwing tube 33. The throwing object can be a water rescue bomb 34, a fire extinguishing bomb 35, an anchor hook launching bomb 36, a glass breaking bomb 37, a gas reconnaissance bomb 38 or a training bomb 39. The throwing tubes 33 supporting the water rescue bomb 34, the fire extinguishing bomb 35, the anchor hook launching bomb 36, the glass breaking bomb 37 and the training bomb 39 are the same, and the throwing tube 33 supporting the gas reconnaissance bomb 38 is a large-diameter throwing tube 33. The water rescue bomb 34 and the anchor hook launching bomb 36 are connected with a connecting rope, and the other end of the connecting rope is connected to the gas cylinder 1. A pressure sensor 40 is inserted into the cylinder 4 on the rear end surface of the cylinder 4.

[0043] Specific use process:

[0044] After the gas cylinder 3 is filled with compressed air, it is connected to the connecting pipe 15, and the switch of the gas cylinder 3 is turned on. The compressed air in the gas cylinder 3 is discharged outward, and the movable valve 17 moves to the left under the action of air pressure. When the movable valve 17 moves to the left until the air needle 20 passes through the movable valve 17, the compressed air in the gas cylinder 3 enters the central cavity 10 through the air needle 20. When the air pressure in the central cavity 10 rises but does not reach the opening pressure of the one-way valve 13, the compressed air exerts a force on the second piston 23 to make the piston assembly 5 move to the left as a whole. When the first piston 22 is abutted and sealed with the abutting sealing ring 6, the piston assembly 5 can no longer move to the left. At this time, the air pressure in the central cavity 10 continues to rise. When the air pressure is greater than the opening pressure of the one-way valve 13, the compressed air enters the compressed air storage area 8 from the central cavity 10. Until the air pressure on the left and right sides of the movable valve 17 is balanced, the movable valve 17 is reset under the action of the air nozzle spring 19, and the air needle 20 is separated from the movable valve 17.

[0045] When the trigger 26 is pulled, the rubber plug 32 is disengaged, the air outlet pipe 14 is opened, and the compressed air in the central cavity 10 is discharged from the air outlet pipe 14 until the air pressure in the central cavity 10 is equal to the atmospheric pressure. When the air pressure in the central cavity 10 decreases, the force exerted by the air pressure in the compressed air storage area 8 on the second piston 23 increases until the force is greater than the force exerted on the first piston 22, the piston assembly 5 moves to the right, the first piston 22 is separated from the abutting sealing ring 6, and the compressed air in the compressed air storage area 8 is discharged through the middle of the abutting sealing ring 6. Since there is no spring exerting force on the piston assembly 5 at this time, the compressed air in the compressed air storage area 8 can be completely discharged in a short time until the air pressure in the compressed air storage area 8 is equal to the atmospheric pressure.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional pneumatic throwing device, comprising an air cylinder (1), a hand support assembly (2) and a gas cylinder (3), wherein a compressed air storage area (8) is provided in the air cylinder (1), and wherein: The air cylinder (1) comprises a cylinder (4) and a piston assembly (5) located in the cylinder (4); one end of the cylinder (4) is an open end; a contact sealing ring (6) is formed in the cylinder (4) near the open end; a central box (9) is fixedly arranged in the compressed air storage area (8); a central cavity (10) is formed in the central box (9); an air outlet pipe (14) is provided on the central box (9) for connecting the central cavity (10) and the outside atmosphere; a rubber plug (32) is provided at the outlet of the air outlet pipe (14) for controlling the opening and closing of the outlet of the air outlet pipe (14); and the central box (9) faces the central box (9). A through hole (11) is provided on one side of the abutting sealing ring (6) for connecting the central cavity (10) and the compressed air storage area (8): the piston assembly (5) comprises a piston rod (21) and a first piston (22) and a second piston (23) connected to both ends of the piston rod (21); the second piston (23) is located in the central cavity (10); when the first piston (22) abuts against the abutting sealing ring (6), a distance is left between the second piston (23) and the inner side wall of the central box (9); and the cross-sectional area of ​​the second piston (23) is larger than the central area of ​​the abutting sealing ring (6); The central box (9) is provided with a one-way hole (12), and a one-way valve (13) is installed in the one-way hole (12) for controlling the airflow from the central cavity (10) to the compressed air storage area (8). The end of the cylinder (4) facing away from the sealing ring (6) is provided with a connecting pipe (15) connected to the air cylinder (1). The surface of the cylinder (4) is provided with a balancing hole (16) connecting the connecting pipe (15) and the compressed air storage area (8). A movable air valve (17) is provided, and the outer wall of the movable air valve (17) is sleeved with an air valve sealing ring (18) that cooperates with the inner wall of the connecting tube (15) to seal; an air valve spring (19) is installed between the movable air valve (17) and the cylinder (4), and an air needle (20) is also installed in the connecting tube (15), the needle head of the air needle (20) is aligned with the center of the movable air valve (17), and the other end of the air needle (20) passes through the cylinder (4) and extends into the central cavity (10); The hand support assembly (2) comprises an operating hand support (25) fixedly connected to the cylinder (4), a trigger (26) is installed in the operating hand support (25), the middle part of the trigger (26) is rotatably connected to the operating hand support (25), a return spring (29) is provided between the lower end of the trigger (26) and the operating hand support (25), the upper end of the trigger (26) is slidably connected to a slider (30) in the up-down direction, a penetration rod (31) having a diameter smaller than the inner diameter of the air outlet pipe (14) is rotatably connected to the slider (30), and a rubber plug (32) is fixedly connected to one end of the penetration rod (31) passing through the air outlet pipe (14).

2. The multifunctional pneumatic throwing device according to claim 1 is characterized in that: The outer side of the connecting pipe (15) is formed with an external thread that matches the gas cylinder (3).

3. The multifunctional pneumatic throwing device according to claim 1 is characterized in that: A piston sealing ring (24) is formed on the side of the first piston (22) facing the abutting sealing ring (6); the diameter of the piston sealing ring (24) is larger than the inner diameter of the abutting sealing ring (6) and smaller than the diameter of the second piston (23).

4. The multifunctional pneumatic throwing device according to claim 1 is characterized in that: A positioning groove (27) is formed on the side surface of the lower end of the trigger (26), a positioning rod (28) is formed on the operating hand support (25) at a position opposite to the positioning groove (27), a return spring (29) is sleeved on the positioning rod (28), and one end of the return spring (29) is inserted into the positioning groove (27).

5. The multifunctional pneumatic throwing device according to claim 1 is characterized in that: A launching area (7) is formed in the cylinder (4) on the side of the cylinder (4) that abuts against the sealing ring (6) and faces away from the compressed air storage area (8).

6. The multifunctional pneumatic throwing device according to claim 1 is characterized in that: It also comprises a throwing assembly, which comprises a throwing cylinder (33) threadedly connected to the cylinder body (4) and a throwing object inserted into the throwing cylinder (33).

7. The multifunctional pneumatic throwing device according to claim 6 is characterized in that: A pressure sensor (40) is inserted into the rear end surface of the cylinder (4) and penetrates into the cylinder (4).

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