Fire extinguisher for fire fighting

Abstract

The invention relates to the technical field of fire-fighting instruments, and discloses a fire extinguisher for fire fighting, which comprises a fixed handle, a movable handle and a bolt, and further comprises a bottle body, a connecting seat and a triggering assembly, a plurality of nitrogen tanks are arranged in the bottle body and are positioned on the circumference with the same radius; a nozzle is arranged on one side of the connecting base, a first through hole communicated with the interior of the bottle body is formed in the connecting base in a penetrating mode, a powder spraying pipe is movably connected into the first through hole, one end of the powder spraying pipe extends out of the connecting base to be selectively matched with the movable handle, and a second through hole communicated with the nozzle is formed in the powder spraying pipe. A plurality of trigger rods matched with the plurality of nitrogen tanks in a puncturing manner are arranged on the powder spraying pipe, and the plurality of trigger rods are positioned on the circumference with the same radius; and the triggering assembly is used for driving the powder spraying pipe to rotate so as to drive the multiple triggering rods to be selectively matched with the multiple nitrogen tanks in a puncturing mode. The number of the started nitrogen tanks can be selected according to actual working conditions, use is flexible, and dry powder and nitrogen are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and more particularly to a fire extinguisher for fire fighting. Background Art

[0002] Fire extinguishers are important tools for extinguishing early fires and are widely used in homes, commercial places, industrial facilities, etc. According to their working principles and structures, fire extinguishers are mainly divided into permanent pressurized fire extinguishers and immediate pressurized fire extinguishers. The existing types of immediate pressurized fire extinguishers include: carbon dioxide (CO2) fire extinguishers, dry powder fire extinguishers and foam fire extinguishers.

[0003] In the related art, the fire extinguishing agent and driving gas of the pressurized fire extinguisher are usually stored separately. Taking a dry powder fire extinguisher as an example, a nitrogen tank and dry powder are arranged inside the bottle body, and compressed nitrogen is stored in the nitrogen tank. When in use, press the movable handle downward, and the movable handle will move downward to drive the trigger rod to pierce the sealing film at the mouth of the nitrogen tank, so that the compressed nitrogen in the nitrogen tank will be quickly released and the nitrogen in the bottle will be pressed into the powder spraying tube, and then sprayed out by the nozzle. However, once the sealing film of the nitrogen tank is punctured, it is difficult to seal it again, and the dry powder in the bottle will continue to spray out. When encountering a small fire, it may not be necessary to use a large amount of dry powder, which will easily cause a waste of dry powder and nitrogen. For this reason, we propose a fire extinguisher for firefighting. Summary of the invention

[0004] The invention provides a fire extinguisher for fire fighting, which solves the technical problem in the related art that once the sealing film of the nitrogen tank is punctured, it is difficult to seal again, which easily causes waste of dry powder and nitrogen.

[0005] The present invention provides a fire extinguisher for firefighting, comprising: a fixed handle, a movable handle and a latch. The fire extinguisher for firefighting also comprises: a bottle body, in which a plurality of nitrogen tanks are arranged, and the plurality of nitrogen tanks are on a circumference of the same radius; a connecting seat, which is used to connect the bottle body and the fixed handle, and a nozzle is arranged on one side of the connecting seat, a first through hole communicating with the interior of the bottle body is penetrated in the connecting seat, a powder spraying tube is movably connected in the first through hole, one end of the powder spraying tube extends to the outside of the connecting seat and selectively cooperates with the movable handle, a second through hole communicating with the nozzle is arranged on the powder spraying tube, a connecting plate is arranged on the powder spraying tube, and a plurality of trigger rods for piercing and cooperating with the plurality of nitrogen tanks are arranged on the connecting plate, and the plurality of trigger rods are on a circumference of the same radius; a trigger assembly, which is used to drive the powder spraying tube to rotate, so as to drive the plurality of trigger rods to selectively pierce and cooperate with the plurality of nitrogen tanks.

[0006] As a further improvement of the present invention, a first step portion is provided on the outer wall of the powder spraying tube, a second step portion is provided in the first through hole, and a first elastic member is provided between the first step portion and the second step portion.

[0007] As a further improvement of the present invention, an annular support frame is provided on the inner wall of the bottle body. An installation frame is provided inside the annular support frame. A plurality of the nitrogen tanks are fixedly connected to the installation frame, and a connecting rod is provided between the annular support frame and the installation frame.

[0008] As a further improvement of the present invention, the central angle corresponding to the arc formed by connecting the centers of a plurality of the nitrogen tanks is less than 180°.

[0009] As a further improvement of the present invention, in the vertical direction, the cross-section of the second through hole is an arc structure, and the central angle corresponding to the second through hole is greater than or equal to the central angle corresponding to the arc formed by connecting the centers of a plurality of the nitrogen tanks.

[0010] As a further improvement of the present invention, the triggering assembly includes: a U-shaped frame, a rotating shaft, a first gear, a second gear, a worm gear, a worm and a knob. The U-shaped frame is provided on the top of the connecting seat and the opening of the U-shaped frame faces the connecting seat. The two ends of the rotating shaft are respectively rotatably connected to the top of the connecting seat and the U-shaped frame. The first gear is fixedly connected to the powder spraying pipe. The second gear and the worm gear are both fixedly connected to the rotating shaft, and the second gear is adapted to the first gear. The worm is rotatably connected to the U-shaped frame and is adapted to the worm gear. One end of the worm penetrates out of the U-shaped frame and is fixedly connected to the knob.

[0011] As a further improvement of the present invention, the knob is arranged near one end of the nozzle.

[0012] As a further improvement of the present invention, the thickness dimension of the first gear is greater than the thickness dimension of the second gear, and the number of teeth of the first gear is the same as that of the second gear.

[0013] As a further improvement of the present invention, the top of the rotating shaft extends out of the top of the U-shaped frame and is fixedly connected to a rotating plate. An arc-shaped plate is provided on the top of the U-shaped frame. The arc-shaped plate and the rotating plate are concentrically arranged, and the inner diameter of the arc-shaped plate is greater than the diameter of the rotating plate. A plurality of limiting holes are provided on the side of the arc-shaped plate facing the rotating plate. The number of the limiting holes is the same as the number of the trigger rods, and the central angle corresponding to adjacent two limiting holes is the same as the central angle corresponding to adjacent two trigger rods; a plurality of limiting components are provided on the rotating plate. The number of the limiting components is the same as the number of the limiting holes, and the central angle corresponding to adjacent two limiting components is the same as the central angle corresponding to adjacent two trigger rods. A plurality of limiting components are selectively matched with a plurality of limiting holes.

[0014] As a further improvement of the present invention, the limit assembly includes: an installation groove arranged radially along the rotating plate, a limit member slidably connected inside the installation groove, a second elastic member is arranged between the limit member and the bottom of the installation groove, and in an initial state, part of the limit member is located outside the installation groove, and the part of the limit member extending out of the installation slot selectively cooperates with multiple limit holes.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention arranges a plurality of nitrogen tanks inside the bottle body, and drives the powder spraying tube to rotate by turning the knob, so that the positions of a plurality of trigger rods matched with the nitrogen tanks can be adjusted, and then the number of nitrogen tanks to be enabled can be selected according to actual working conditions, which is more flexible to use and can save dry powder and nitrogen.

[0017] 2. The present invention provides a rotating plate at the top of the rotating shaft, and the rotating plate is provided with the same number of limit assemblies as the trigger rod, and an arc plate is provided on the top of the connecting seat, and the same number of limit holes as the limit assemblies and matching with each other are opened on the arc plate. In this way, in the process of rotating the powder spraying tube, the matching number of the trigger rod and the nitrogen tank can be judged according to the matching number of the limit assemblies and the limiting holes, which is more accurate and flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of a fire extinguisher for fire fighting according to an embodiment of the present invention;

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of a fire extinguisher for fire fighting according to an embodiment of the present invention;

[0020] Figure 3 It is a partial side view structural diagram of a fire extinguisher for fire fighting according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the top view of a fire extinguisher for fire fighting according to an embodiment of the present invention;

[0022] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0023] Figure 6 It is a schematic diagram of a first front cross-sectional structure of a fire extinguisher according to an embodiment of the present invention;

[0024] Figure 7 It is a partial structural schematic diagram of a second front cross-section of a fire extinguisher for fire fighting according to an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of a first top cross-sectional structure of a fire extinguisher according to an embodiment of the present invention;

[0026] Fig. 9 is the second top - view sectional structure schematic diagram of a fire extinguisher according to an embodiment of the present invention;

[0027] Fig.10 is Fig. 9 the enlarged view of part B in

[0028] Fig.11 is the third top - view sectional structure schematic diagram of a fire extinguisher according to an embodiment of the present invention;

[0029] Fig.12 is the fourth top - view sectional structure schematic diagram of a fire extinguisher according to an embodiment of the present invention.

[0030] In the figure: 1, fixed handle; 2, movable handle; 3, bolt; 4, bottle body; 5, nitrogen tank; 6, connecting seat; 61, nozzle; 62, first through - hole; 621, second step portion; 7, powder spraying pipe; 71, second through - hole; 72, connecting plate; 721, trigger rod; 73, first step portion; 8, trigger assembly; 81, C - shaped frame; 82, rotating shaft; 83, first gear; 84, second gear; 85, worm gear; 86, worm; 87, knob; 9, first elastic member; 10, annular support frame; 11, mounting frame; 12, connecting rod; 13, rotating plate; 14, arc plate; 141, limiting hole; 15, limiting assembly; 151, mounting groove; 152, limiting member; 153, second elastic member. Detailed implementation manners

[0031] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0032] As Figure 1-Figure 12 shown, a fire extinguisher includes: a fixed handle 1, a movable handle 2, and a bolt 3. Among them, the fixed handle 1, the movable handle 2, and the bolt 3 are all prior arts. The bolt 3 is mainly used to limit the movable handle 2. When in use, the bolt 3 needs to be pulled out from the movable handle 2, so as to release the limit on the movable handle 2, and then the movable handle 2 can be pressed downwards.

[0033] As Figure 1 、 Figure 2 、 Figure 6 and Fig.12As shown, the fire extinguisher for fire fighting also includes: a bottle body 4, a connecting seat 6 and a trigger assembly 8. Among them, the bottle body 4 mainly plays the role of storage and sealing, and can be used to store nitrogen tanks 5 and dry powder. An annular support frame 10 is fixedly connected to the inner wall of the bottle body 4, and a mounting frame 11 is arranged inside the annular support frame 10, that is, at the center position. A plurality of nitrogen tanks 5 are fixedly connected to the mounting frame 11, and a plurality of connecting rods 12 are fixedly connected between the annular support frame 10 and the mounting frame 11. In this way, a gap will be left between two adjacent connecting rods 12. Compared with the physical connection method, while realizing the fixation of the plurality of nitrogen tanks 5, space can be provided for the flow of nitrogen, and the weight of the entire fire extinguisher can also be relatively reduced. In addition, the plurality of nitrogen tanks 5 are arranged on a circumference of the same radius, and such an arrangement can be convenient for cooperation with the trigger assembly 8.

[0034] The connecting seat 6 mainly plays a connecting role, and can connect the bottle body 4 and the fixed handle 1. Specifically, the main body of the connecting seat 6 can be a rotating body structure, and the connecting seat 6 is provided with a first through hole 62 along its axial direction, and one end of the first through hole 62 is connected to the opening on the bottle body 4. A nozzle 61 is provided on the outer peripheral wall of the connecting seat 6, and the nozzle 61 is connected to the first through hole 62. The nozzle 61 is mainly used to spray dry powder. A powder spraying tube 7 is movably connected in the first through hole 62, that is, the powder spraying tube 7 can move in the first through hole 62 along the axial direction of the first through hole 62, and can also rotate in the first through hole 62. In addition, a second through hole 71 is provided on the powder spraying tube 7, and the second through hole 71 is connected to the nozzle 61. It should be noted that the bottom of the powder spraying tube 7 is arranged close to the bottom of the bottle body 4, which is conducive to making the spraying of dry powder more thorough. The other end of the powder spraying tube 7 is a sealing structure, and the other end of the powder spraying tube 7 passes through the outside of the first through hole 62, which is mainly used for selectively cooperating with the movable handle 2.

[0035] A connecting plate 72 is fixedly connected to the powder spraying tube 7, and the connecting plate 72 is located inside the bottle body 4 and on the side of the nitrogen tank 5 close to the nozzle 61. A plurality of trigger rods 721 are fixedly connected to the side of the connecting plate 72 facing the nitrogen tank 5, and the number of the trigger rods 721 is the same as the number of the nitrogen tanks 5. It should be noted that the nitrogen tank 5 is sealed by a sealing film, and the trigger rod 721 selectively punctures the sealing film on the nitrogen tank 5 to release the compressed nitrogen in the nitrogen tank 5, so that the dry powder in the bottle body 4 can enter the powder spraying tube 7 under the pressure of the nitrogen, and then be sprayed out by the nozzle 61 to achieve the fire extinguishing operation.

[0036] In addition, if Fig.12As shown, multiple trigger rods 721 are on the circumference of the same radius, which makes it easy for the trigger rod 721 to cooperate with the nitrogen tank 5. It should be noted that the two adjacent nitrogen tanks 5 and the two adjacent trigger rods 721 can be set at equal angles. It should be noted that the two trigger rods 721 that are farthest apart and the two nitrogen tanks 5 that are farthest apart in this application are not in an adjacent relationship. For ease of use, in the initial state, one of the trigger rods 721 can be located directly above a nitrogen tank 5, and the other trigger rods 721 are staggered with the remaining nitrogen tanks 5, so that when the movable handle 2 is pressed down, the movable handle 2 will contact the top of the powder spraying tube 7, and the powder spraying tube 7 will move toward the inside of the bottle body 4 under the pressure of the movable handle 2, and then the trigger rod 721 can be driven to press down through the connecting plate 72, so that one of the trigger rods 721 can directly puncture the sealing membrane of the corresponding nitrogen tank 5 without rotating the connecting plate 72, which is faster to use. When the fire is large and multiple nitrogen tanks 5 are required to release nitrogen at the same time, the powder spraying tube 7 can be rotated, and the rotation of the powder spraying tube 7 can drive the connection plate 72 to rotate, and then drive the rotation of multiple trigger rods 721. When in use, the angle of rotation of the connection plate 72 can be determined according to the actual working conditions, so as to control the number of nitrogen tanks 5 that are activated.

[0037] For example, in this embodiment, the number of nitrogen tanks 5 and trigger rods 721 are both three, and the angles between the nitrogen tanks 5 on both sides and the middle nitrogen tank 5, and between the trigger rods 721 on both sides and the middle trigger rod 721 are both 60°. From a top view of the bottle body 4, in a counterclockwise direction, the third trigger rod 721 is located directly above the first nitrogen tank 5. When the powder spraying tube 7 is rotated counterclockwise, the third trigger rod 721 will be located above the second nitrogen tank 5 and the third nitrogen tank 5 in turn, the second trigger rod 721 will be located directly above the first nitrogen tank 5 and the second nitrogen tank 5 in turn, and the first trigger rod 721 will be located directly above the first nitrogen tank 5. The specific rotation angle can be rotated according to the actual working conditions.

[0038] In addition, if Figure 7As shown, a first step portion 73 is provided on the outer wall of the powder spraying tube 7, a second step portion 621 is provided in the first through hole 62, and a first elastic member 9 is provided between the first step portion 73 and the second step portion 621. It should be noted that the first step portion 73 is located above the second step portion 621, and the first step portion 73 and the second step portion 621 mainly play a role of limiting, which can make the setting of the first elastic member 9 more reliable and stable. When in use, when the movable handle 2 presses the powder spraying tube 7 downward, the first elastic member 9 will be compressed at this time. When the movable handle 2 is released, the powder spraying tube 7 will return to its original position upward under the action of the restoring force of the first elastic member 9, so as to facilitate the subsequent rotation operation of the powder spraying tube 7, and it is also more convenient to use. Among them, the first elastic member 9 can be a spring or other suitable components.

[0039] It should be noted that, in the process of the powder spraying tube 7 moving up and down, the second through hole 71 can be always connected with the nozzle 61 , so as to ensure that the dry powder is sprayed out from the nozzle 61 smoothly.

[0040] As an optional embodiment, Fig.12 As shown, the central angle of the arc formed by the centers of the multiple nitrogen tanks 5 is less than 180°. Since the multiple trigger rods 721 are selectively matched with the multiple nitrogen tanks 5, the central angle of the arc formed by the centers of the multiple trigger rods 721 is also less than 180°. This arrangement can be designed according to the working conditions to ensure that only one trigger rod 721 is located directly above the nitrogen tank 5, so that the cooperation between the multiple trigger rods 721 and the multiple nitrogen tanks 5 can be more comprehensive.

[0041] In addition, in the vertical direction, the cross section of the second through hole 71 is an arc structure, and the center angle corresponding to the second through hole 71 is greater than or equal to the center angle corresponding to the arc formed by the centers of the multiple nitrogen tanks 5. It should be noted that during the rotation of the powder spraying tube 7, it is necessary to keep the second through hole 71 always connected to the nozzle 61, so as to ensure the smooth spraying of the dry powder. Therefore, the second through hole 71 can be set to an arc structure. The center angle corresponding to the second through hole 71 is greater than or equal to the center angle corresponding to the arc formed by the centers of the multiple nitrogen tanks 5, that is, the center angle corresponding to the second through hole 71 is greater than or equal to the center angle corresponding to the arc formed by the centers of the multiple trigger rods 721. In this way, by setting the initial position of the second through hole 71, the second through hole 71 can be always kept connected to the nozzle 61 during the process of rotating the connecting plate 72 to adjust the position of the multiple trigger rods 721 to cooperate with the multiple nitrogen tanks 5.

[0042] In addition, if Figure 1 and Figure 2 As shown, the trigger assembly 8 is used to drive the powder spraying tube 7 to rotate, so as to drive the multiple trigger rods 721 to selectively puncture and cooperate with the sealing films on the multiple nitrogen tanks 5.

[0043] Specifically, as Figure 2-Figure 7 shown, the trigger assembly 8 includes: a C-shaped frame 81, a rotating shaft 82, a first gear 83, a second gear 84, a worm gear 85, a worm 86, and a knob 87. The C-shaped frame 81 is fixedly connected to the top of the connecting seat 6, and the opening of the C-shaped frame 81 faces the connecting seat 6. Both ends of the rotating shaft 82 are rotatably connected to the top of the connecting seat 6 and the C-shaped frame 81 respectively. The first gear 83 is fixedly connected to the powder spraying pipe 7. The second gear 84 and the worm gear 85 are both fixedly connected to the rotating shaft 82, and the second gear 84 is adapted to the first gear 83. The worm 86 is rotatably connected to the C-shaped frame 81 and is adapted to the worm gear 85. One end of the worm 86 extends out of the C-shaped frame 81 and is fixedly connected to the knob 87.

[0044] During use, when it is necessary to adjust the angle of the powder spraying pipe 7 to adjust the position of the trigger rod 721, rotate the knob 87. The rotation of the knob 87 will drive the worm 86 to rotate. The rotation of the worm 86 can drive the rotating shaft 82 to rotate through the cooperation with the worm gear 85. The rotation of the rotating shaft 82 will drive the second gear 84 to rotate. Since the second gear 84 is adapted to the first gear 83, and the first gear 83 is fixedly connected to the powder spraying pipe 7, the powder spraying pipe 7 can be driven to rotate.

[0045] As an alternative embodiment, as Figure 2 shown, the knob 87 is arranged near one end of the nozzle 61. It should be noted that since the side of the movable handle 2 close to the operator needs to be pressed downward, the knob 87 is arranged near one end of the nozzle 61, that is, the end far from the operator, so as to avoid interference between the knob 87 and the movable handle 2 and facilitate the operator to operate the knob 87.

[0046] In addition, as Figure 7 shown, the thickness dimension of the first gear 83 is greater than the thickness dimension of the second gear 84, and the number of teeth of the first gear 83 is the same as that of the second gear 84. It should be noted that when the movable handle 2 presses the powder spraying pipe 7 downward, the first gear 83 will move downward with the powder spraying pipe 7. Therefore, the design that the thickness dimension of the first gear 83 is greater than the thickness dimension of the second gear 84 can keep the first gear 83 in contact with the second gear 84 all the time during the up and down movement of the first gear 83, so that the cooperation between the first gear 83 and the second gear 84 is more stable.

[0047] In addition, the number of teeth of the first gear 83 is the same as that of the second gear 84, that is, when the second gear 84 rotates one week, the first gear 83 also rotates one week, so that the rotation of the powder spraying pipe 7 and the rotating shaft 82 is more synchronous, which is convenient for the operator to observe and operate

[0048] Furthermore, as Figure 7-10As shown, the top of the rotating shaft 82 extends to the top of the C-shaped frame 81 and is fixedly connected to a rotating plate 13 with a cylindrical structure. The top of the C-shaped frame 81 is fixedly connected to an arc-shaped plate 14. The arc-shaped plate 14 is concentric with the rotating plate 13, and the inner diameter of the arc-shaped plate 14 is larger than the diameter of the rotating plate 13, that is to say, the arc-shaped plate 14 is arranged outside the rotating plate 13. A plurality of limiting holes 141 are formed on the side of the arc-shaped plate 14 facing the rotating plate 13. The length direction of the limiting holes 141 is arranged along the radial direction of the arc-shaped plate 14. The number of the limiting holes 141 is the same as the number of the trigger rods 721, and the central angle corresponding to adjacent two limiting holes 141 is the same as the central angle corresponding to adjacent two trigger rods 721. A plurality of limiting components 15 are arranged on the rotating plate 13. The number of the limiting components 15 is the same as the number of the limiting holes 141, and the central angle corresponding to adjacent two limiting components 15 is the same as the central angle corresponding to adjacent two trigger rods 721. The plurality of limiting components 15 are selectively matched with the plurality of limiting holes 141.

[0049] Among them, the cooperation between the limiting component 15 and the limiting hole 141 is mainly used to judge the rotation angle of the rotating shaft 82, so as to judge the positions of the plurality of trigger rods 721. For example, in the initial state, only one trigger rod 721 is located directly above the nitrogen tank 5, and at this time only one limiting component 15 is matched with the limiting hole 141. When it is necessary to rotate the powder spraying pipe 7 to adjust the cooperation between the plurality of trigger rods 721 and the plurality of nitrogen tanks 5, at this time, it is necessary to rotate the knob 87. The rotation of the knob 87 will drive the rotating shaft 82 to rotate. On the one hand, the rotation of the rotating shaft 82 drives the powder spraying pipe 7 to rotate through the cooperation of the second gear 84 and the first gear 83. On the other hand, it will drive the rotating plate 13 to rotate. At this time, the limiting component 15 initially matched with the limiting hole 141 will disengage from the limiting hole 141 and gradually move to the next limiting hole 141 for limiting cooperation. Another limiting component 15 adjacent to the limiting component 15 will gradually cooperate with the limiting hole 141. Since the rotation of the powder spraying pipe 7 and the rotating shaft 82 is synchronous, the number of the trigger rods 721 cooperating with the nitrogen tanks 5 can be judged according to the number of the limiting components 15 cooperating with the limiting holes 141, which is more convenient and flexible to use.

[0050] In addition, as Fig.10As shown, the limiting assembly 15 includes a mounting groove 151 radially arranged along the rotating plate 13, a limiting member 152 is slidably connected inside the mounting groove 151, a second elastic member 153 is arranged between the limiting member 152 and the groove bottom of the mounting groove 151, and in the initial state, a part of the limiting member 152 is located outside the mounting groove 151, and the part of the limiting member 152 extending out of the mounting groove 151 selectively cooperates with a plurality of limiting holes 141. The second elastic member 153 may be a spring. It should be noted that when the limit assembly 15 rotates with the rotating plate 13, when the limit member 152 contacts the arc plate 14, the inner wall of the arc plate 14 will squeeze the limit member 152, and the second elastic member 153 will be compressed. When the limit member 152 corresponds to the limit hole 141, the limit member 152 will be ejected into the corresponding limit hole 141, so as to achieve the limit of the limit member 152 and the limit hole 141, and a collision sound will be generated. The operator can judge the rotation angle of the powder spraying tube 7 and the position of the trigger rod 721 according to the feel and sound. Continue to rotate the rotating plate 13, the limit member 152 located in the limit hole 141 will be squeezed out of the limit hole 141 again, and move toward the next limit hole 141, and the corresponding second elastic member 153 will be compressed again. The adjacent limiting members 152 will follow the movement and gradually cooperate with the limiting hole 141 , and so on. When all the limiting members 152 are located in the limiting hole 141 , it means that all the trigger rods 721 are located directly above the nitrogen tank 5 .

[0051] As an optional embodiment, Fig.10 As shown, the portion of the limiting member 152 extending out of the mounting groove 151 is a hemispherical structure, so that when the limiting member 152 contacts the arc plate 14 and when the limiting member 152 detaches from the limiting hole 141, the friction between the limiting member 152 and the arc plate 14 and between the limiting member 152 and the inner wall of the limiting hole 141 can be reduced, thereby extending the service life of the device.

[0052] In addition, in order to enable the operator to more directly see the number of limit components 15 and limit holes 141 that match, a portion of the top of the limit hole 141 can be opened to the outside, so that the operator can directly observe the situation inside the limit hole 141, which is more convenient to use.

[0053] An embodiment of the present invention is described above, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of this embodiment.

Claims

1. A fire extinguisher, comprising: A fixed handle (1), a movable handle (2) and a bolt (3), characterized in that the fire extinguisher further comprises: a bottle body (4) provided with a plurality of nitrogen gas cylinders (5) therein, and the plurality of nitrogen gas cylinders (5) are on a circumference with the same radius; A connecting seat (6) for connecting the bottle body (4) and the fixed handle (1), with a nozzle (61) provided on one side thereof. A first through hole (62) communicating with the inside of the bottle body (4) is formed through the connecting seat (6). A powder spraying pipe (7) is movably connected in the first through hole (62). One end of the powder spraying pipe (7) extends out of the connecting seat (6) and selectively cooperates with the movable handle (2). A second through hole (71) communicating with the nozzle (61) is formed in the powder spraying pipe (7). A connecting plate (72) is provided on the powder spraying pipe (7), and a plurality of trigger rods (721) for piercing and cooperating with the plurality of nitrogen gas cylinders (5) are provided on the connecting plate (72), and the plurality of trigger rods (721) are on a circumference with the same radius; A trigger assembly (8) for driving the powder spraying pipe (7) to rotate so as to drive the plurality of trigger rods (721) to selectively pierce and cooperate with the plurality of nitrogen gas cylinders (5).

2. A fire extinguisher according to claim 1, characterized in that: A first step portion (73) is provided on the outer wall of the powder spraying pipe (7), and a second step portion (621) is provided in the first through hole (62). A first elastic member (9) is provided between the first step portion (73) and the second step portion (621).

3. A fire extinguisher according to claim 1, characterized in that: An annular support frame (10) is provided on the inner wall of the bottle body (4), and a mounting frame (11) is provided inside the annular support frame (10). The plurality of nitrogen gas cylinders (5) are fixedly connected to the mounting frame (11), and a connecting rod (12) is provided between the annular support frame (10) and the mounting frame (11).

4. A fire extinguisher according to claim 1, characterized in that: The central angle corresponding to the arc formed by connecting the centers of the plurality of nitrogen gas cylinders (5) is less than 180°.

5. A fire extinguisher according to claim 4, characterized in that: In the vertical direction, the cross-section of the second through hole (71) is an arc-shaped structure, and the central angle corresponding to the second through hole (71) is greater than or equal to the central angle corresponding to the arc formed by connecting the centers of the plurality of nitrogen gas cylinders (5).

6. A fire extinguisher according to claim 1, characterized in that: The trigger assembly (8) includes: a C-shaped frame (81), a rotating shaft (82), a first gear (83), a second gear (84), a worm gear (85), a worm (86) and a knob (87). The C-shaped frame (81) is provided on the top of the connecting seat (6) and the opening of the C-shaped frame (81) faces the connecting seat (6). The two ends of the rotating shaft (82) are respectively rotatably connected to the top of the connecting seat (6) and the C-shaped frame (81). The first gear (83) is fixedly connected to the powder spraying pipe (7). The second gear (84) and the worm gear (85) are both fixedly connected to the rotating shaft (82), and the second gear (84) is adapted to the first gear (83). The worm (86) is rotatably connected to the C-shaped frame (81) and is adapted to the worm gear (85). One end of the worm (86) passes out of the C-shaped frame (81) and is fixedly connected to the knob (87).

7. A fire extinguisher according to claim 6, characterized in that: The knob (87) is provided at one end close to the nozzle (61).

8. A fire extinguisher according to claim 6, characterized in that: The thickness dimension of the first gear (83) is greater than that of the second gear (84), and the number of teeth of the first gear (83) is the same as that of the second gear (84).

9. A fire extinguisher according to claim 6, characterized in that: The top of the rotating shaft (82) extends to the top of the U-shaped frame (81) and is fixedly connected with a rotating plate (13). An arc-shaped plate (14) is arranged at the top of the U-shaped frame (81). The arc-shaped plate (14) and the rotating plate (13) are concentrically arranged. The inner diameter of the arc-shaped plate (14) is greater than the diameter of the rotating plate (13). A plurality of limiting holes (141) are formed on the side of the arc-shaped plate (14) facing the rotating plate (13). The number of the limiting holes (141) is the same as the number of the trigger rods (721), and the central angle corresponding to adjacent two limiting holes (141) is the same as the central angle corresponding to adjacent two trigger rods (721). A plurality of limiting components (15) are arranged on the rotating plate (13). The number of the limiting components (15) is the same as that of the limiting holes (141), and the central angle corresponding to adjacent two limiting components (15) is the same as the central angle corresponding to adjacent two trigger rods (721). The plurality of limiting components (15) are selectively matched with the plurality of limiting holes (141).

10. A fire extinguisher according to claim 9, characterized in that: The limiting component (15) includes: a mounting groove (151) arranged along the radial direction of the rotating plate (13). A limiting member (152) is slidably connected inside the mounting groove (151). A second elastic member (153) is arranged between the limiting member (152) and the bottom of the mounting groove (151). In the initial state, a part of the limiting member (152) is located outside the mounting groove (151), and the part of the limiting member (152) extending out of the mounting groove (151) is selectively matched with the plurality of limiting holes (141).

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