Puncture fire extinguishing device and fire fighting truck

Abstract

The utility model relates to the technical field of fire fighting equipment, and provides a puncture fire extinguishing device and a fire fighting truck, the puncture fire extinguishing device comprises a spray gun rod and a spray gun head, the spray gun rod is provided with a first end and a second end, and the first end of the spray gun rod is suitable for being connected with a conveying pipeline for conveying fire extinguishing media; the spray gun head is arranged at the second end of the spray gun rod and comprises a spray head part and a puncture part, the spray head part is arranged between the puncture part and the spray gun rod, the spray head part is provided with a conveying channel and mounting holes, the conveying channel is communicated with the inner cavity of the spray gun rod, the mounting holes are communicated with the conveying channel, and atomizing nozzles are arranged in at least part of the mounting holes. According to the arrangement, the mounting hole and the atomizing nozzle are arranged on the spray gun head, and the fire extinguishing medium is conveyed to the mounting hole through the spray gun rod and the conveying channel and forms high-pressure spray through the atomizing nozzle, so that the fire extinguishing medium is dispersed to an ignition point in a finer fog drop form, the contact area between the fire extinguishing medium and comburent is increased, and the fire extinguishing efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to a puncture fire-extinguishing device and a fire-fighting truck. Background Art

[0002] The piercing fire extinguishing device is a special fire-fighting equipment. Its piercing spray gun can not only spray out the fire extinguishing medium, but also pierce to penetrate the obstacles that block the fire point, so that the fire extinguishing medium can be sprayed to the fire point and extinguish the burning material.

[0003] At present, the end of the piercing spray gun is provided with a piercing head and a spray head, the piercing head is used to penetrate obstacles, and the spray head is used to spray fire extinguishing medium. However, the spray head in the prior art generally only has a liquid outlet hole, and the fire extinguishing medium is directly sprayed out through the liquid outlet hole. That is to say, the piercing spray gun in the prior art extinguishes fire through direct water, and the fire extinguishing efficiency is low, and there is a waste of fire extinguishing medium.

[0004] Therefore, how to solve the problem of low fire extinguishing efficiency of the piercing spray gun in the prior art has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] The utility model provides a puncture fire extinguishing device and a fire truck, which are used to solve the defect of low fire extinguishing efficiency of the puncture spray gun in the prior art.

[0006] The utility model provides a puncture fire extinguishing device, comprising:

[0007] A spray gun rod having a first end and a second end, wherein the first end of the spray gun rod is suitable for connecting to a delivery pipeline for delivering a fire extinguishing medium;

[0008] A spray gun head is arranged at the second end of the spray gun rod, and the spray gun head includes a spray head and a puncture part which are connected to each other. The spray head is arranged between the puncture part and the spray gun rod. The spray head is provided with a conveying channel and a mounting hole. The conveying channel is connected to the inner cavity of the spray gun rod, and the mounting hole is connected to the conveying channel. An atomizing nozzle is arranged in at least part of the mounting hole.

[0009] According to a piercing fire extinguishing device provided by the utility model, at least two groups of mounting holes are arranged along the axial direction of the spray gun rod, each group of mounting holes includes at least two mounting holes, and each group of mounting holes is spaced apart along the circumference of the spray head.

[0010] According to a puncture fire extinguishing device provided by the utility model, among each group of the mounting holes, at least one group of the mounting holes close to the spray gun rod is the first mounting holes, and the remaining mounting holes are the second mounting holes;

[0011] The first mounting hole extends from the outer surface of the spray head toward the inside, and the extending direction of the first mounting hole is perpendicular to the axis of the spray gun rod;

[0012] The second mounting hole extends from the outer surface of the spray head toward the inside, and along the direction from the outer surface of the spray head toward the inside, the second mounting hole gradually moves away from the puncture portion.

[0013] According to a piercing fire extinguishing device provided by the utility model, the mounting hole extends from the outer surface of the nozzle head toward the inside, the atomizing nozzle is arranged inside the mounting hole, and the spraying surface of the atomizing nozzle is located inside the nozzle head.

[0014] According to a puncture fire extinguishing device provided by the utility model, the first end of the spray gun rod is provided with a first medium inlet and a second medium inlet, and the first medium inlet and the second medium inlet are both communicated with the inner cavity of the spray gun rod.

[0015] According to a puncture fire extinguishing device provided by the utility model, the end of the spray head close to the spray gun rod is the first end of the spray head;

[0016] Along the axial direction of the spray gun rod, the projection area of ​​the spray gun rod is located inside the projection area of ​​the first end of the spray head.

[0017] According to a puncture fire extinguishing device provided by the utility model, the puncture portion comprises:

[0018] A conical portion, wherein the axis of the conical portion coincides with the axis of the spray gun rod, and the outer diameter of the conical portion gradually decreases in a direction away from the spray gun rod;

[0019] The first truncated cone portion is arranged between the conical portion and the spray head portion, and the outer diameter of the first truncated cone portion gradually decreases in a direction away from the spray gun rod.

[0020] According to a puncture fire extinguishing device provided by the utility model, the nozzle head includes:

[0021] A second truncated cone portion is disposed on a side of the first truncated cone portion away from the conical portion, and an average cross-sectional diameter of the second truncated cone portion is greater than an average cross-sectional diameter of the first truncated cone portion;

[0022] The cylindrical portion is arranged between the second truncated cone portion and the spray gun rod.

[0023] According to the puncture fire extinguishing device provided by the utility model, the puncture part is detachably connected to the spray head, and the spray head is detachably connected to the spray gun rod.

[0024] The utility model also provides a fire truck, comprising a fire truck body and the above-mentioned piercing fire extinguishing device, wherein the spray gun rod of the piercing fire extinguishing device is arranged at the end of the arm of the fire truck body.

[0025] The puncture fire extinguishing device provided by the utility model comprises a spray gun rod and a spray gun head, the spray gun rod has a first end and a second end, the first end of the spray gun rod is connected to a delivery pipeline for delivering a fire extinguishing medium, and the fire extinguishing medium is delivered to the spray gun rod through the delivery pipeline. The spray gun head is arranged at the second end of the spray gun rod, the spray gun head comprises a spray head and a puncture part connected to each other, the spray head is arranged between the puncture part and the spray gun rod, the spray head is provided with a delivery channel and a mounting hole, the delivery channel is connected to the inner cavity of the spray gun rod, the mounting hole is connected to the delivery channel, and the fire extinguishing medium in the spray gun rod can be delivered to the mounting hole through the delivery channel. At least part of the mounting hole is provided with an atomizing nozzle, and the fire extinguishing medium can form a high-pressure spray through the atomizing nozzle, so that the fire extinguishing medium is dispersed to the ignition point in the form of finer droplets, increasing the contact area between the fire extinguishing medium and the combustion object, improving the cooling effect on the combustion object and the isolation effect between the combustion object and oxygen, and effectively improving the fire extinguishing efficiency, solving the problem of low fire extinguishing efficiency of the puncture spray gun in the prior art.

[0026] Furthermore, in the fire truck provided by the utility model, since it is equipped with the piercing fire extinguishing device as described above, it also has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the external structure of the puncture fire extinguishing device provided by the utility model;

[0029] Figure 2 It is a cross-sectional view of the puncture fire extinguishing device provided by the utility model;

[0030] Figure 3 It is a schematic diagram of the internal structure of the spray gun head provided by the utility model;

[0031] Figure 4 It is a schematic diagram of the external structure of the spray gun head provided by the utility model;

[0032] Figure 5 It is a schematic diagram of the cone angle of the puncture portion provided by the utility model.

[0033] Reference numerals:

[0034] 1. Spray gun rod; 2. Spray head; 3. Puncture part; 4. Delivery channel; 5. Atomizing nozzle; 6. First mounting hole; 7. Second mounting hole; 8. First medium inlet; 9. Second medium inlet; 10. Conical part; 11. First truncated cone part; 12. Second truncated cone part; 13. Cylindrical part. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Combine the following Figures 1 to 5 The utility model is described in detail.

[0037] like Figures 1 to 5 As shown, the piercing fire extinguishing device provided by the embodiment of the utility model includes a spray gun rod 1 and a spray gun head.

[0038] Specifically, the spray gun rod 1 has a first end and a second end. The first end of the spray gun rod 1 is connected to a delivery pipeline for delivering a fire extinguishing medium, and the fire extinguishing medium is delivered to the spray gun rod 1 through the delivery pipeline.

[0039] The spray gun head is arranged at the second end of the spray gun rod 1, and the spray gun head includes a spray head 2 and a puncture part 3 which are connected to each other. The spray head 2 is arranged between the puncture part 3 and the spray gun rod 1. The spray head 2 is provided with a conveying channel 4 and a mounting hole. The conveying channel 4 is connected to the inner cavity of the spray gun rod 1, and the mounting hole is connected to the conveying channel 4. The fire extinguishing medium in the spray gun rod 1 can be conveyed to the mounting hole through the conveying channel 4.

[0040] An atomizing nozzle 5 is arranged in at least part of the mounting hole. The fire extinguishing medium can form a high-pressure spray through the atomizing nozzle 5, so that the fire extinguishing medium is dispersed to the fire point in the form of finer droplets, thereby increasing the contact area between the fire extinguishing medium and the combustion object, improving the cooling effect on the combustion object and the isolation effect between the combustion object and oxygen, and effectively improving the fire extinguishing efficiency, thereby solving the problem of low fire extinguishing efficiency of the piercing spray gun in the prior art.

[0041] It should be noted that the spray gun rod 1 provided in the embodiment of the utility model is fixedly installed at the end of the arm of the fire truck, and the movement of the spray gun rod 1 can be controlled by controlling the movement of the arm of the fire truck. The movement of the arm of the fire truck can provide power for the penetration work of the piercing fire extinguishing device, so that the piercing fire extinguishing device has a strong penetration force and can penetrate obstacles with greater strength. When the piercing fire extinguishing device is installed on the arm of the fire truck, the first end of the spray gun rod 1 of the piercing fire extinguishing device can be connected to the delivery pipeline for delivering the fire extinguishing medium located on the arm of the fire truck, so that the fire extinguishing medium of the fire truck is sprayed out through the piercing fire extinguishing device.

[0042] A filter screen is provided between the spray head 2 and the second end of the spray gun rod 1 for filtering the fire extinguishing medium that is about to enter the delivery channel 4 of the spray head 2 to prevent impurities from clogging the atomizing nozzle 5 .

[0043] The spray head 2 is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged in groups in the spray head 2. In the embodiment of the utility model, the mounting holes are divided into at least two groups along the axis direction of the spray gun rod 1. Figure 3 The dotted lines indicated by x are parallel.

[0044] Each group of mounting holes is spaced apart along the circumference of the nozzle head 2 , and each group of mounting holes includes at least two mounting holes, and an atomizing nozzle 5 is correspondingly arranged in each mounting hole.

[0045] Such an arrangement allows the fire extinguishing medium to be sprayed at multiple positions and multiple directions of the spray head 2, thereby increasing the spraying range of the fire extinguishing medium.

[0046] Among the above-mentioned groups of mounting holes, at least one group of mounting holes close to the spray gun rod 1 is the first mounting holes 6 , and the remaining mounting holes are the second mounting holes 7 .

[0047] The first mounting hole 6 extends from the outer surface of the spray head 2 to the inner surface, and the extending direction of the first mounting hole 6 is perpendicular to the axis of the spray gun rod 1. Figure 3 , the extending direction of the dotted line indicated by m is the extending direction of one of the first mounting holes 6. The fire extinguishing medium is sprayed out at the position of the first mounting hole 6 in a direction substantially perpendicular to the axis of the spray gun rod 1. The opening directions of each first mounting hole 6 are different. The fire extinguishing medium sprayed out of each first mounting hole 6 constitutes a fire extinguishing medium curtain. The fire extinguishing medium curtain has an isolating effect and can effectively prevent the spread of fire. In some cases, it can also reduce the air entering the space between the fire extinguishing medium curtain and the fire point.

[0048] The second mounting hole 7 extends from the outer surface of the spray head 2 to the inner surface, and the second mounting hole 7 gradually moves away from the puncture part 3 along the direction from the outer surface of the spray head 2 to the inner surface. Figure 3, the extending direction of the dot-dash line indicated by n is the extending direction of one of the second mounting holes 7. That is to say, after the fire extinguishing medium is sprayed from the atomizing nozzle 5 at the second mounting hole 7, it has a movement component gradually approaching the puncture portion 3 along the axial direction of the spray gun rod 1. The fire extinguishing medium sprayed from each second mounting hole 7 attacks the fire point with a jet flow to extinguish the fire.

[0049] Reference Figure 3 and Figure 4 Three groups of mounting holes are provided on the spray head 2 , wherein the group of mounting holes closest to the spray gun rod 1 is the first mounting holes 6 , and the other two groups of mounting holes are the second mounting holes 7 .

[0050] In this embodiment, the mounting hole extends from the outer surface of the nozzle head 2 to the inside, and the atomizing nozzle 5 is arranged inside the mounting hole. The spraying surface of the atomizing nozzle 5 is located inside the nozzle head 2. When the outer surface of the nozzle head 2 contacts with other objects, there is a certain distance between the spraying surface of the atomizing nozzle 5 and the object, and the outer surface of the atomizing nozzle 5 does not contact the object.

[0051] When the puncture portion 3 is used to penetrate an obstacle, even if the nozzle head 2 passes through the obstacle or the nozzle head 2 contacts the obstacle, the atomizing nozzle 5 will not be damaged, which is beneficial to prolonging the service life of the puncture fire extinguishing device.

[0052] It should be noted that the spraying surface of the atomizing nozzle 5 is the surface on the atomizing nozzle 5 that can spray the fire extinguishing medium outwards. The spraying surface of the atomizing nozzle 5 can also be flush with the outer surface of the nozzle head 2, as long as it does not affect the piercing action of the piercing fire extinguishing device. Figure 4 In the figure, only the situation that the spraying surface of the atomizing nozzle 5 is flush with the outer surface of the nozzle head 2 is illustrated.

[0053] In the embodiment of the utility model, a first medium inlet 8 and a second medium inlet 9 are provided at the first end of the spray gun rod 1, and the first medium inlet 8 and the second medium inlet 9 are both connected to the inner cavity of the spray gun rod 1. The first medium inlet 8 and the second medium inlet 9 are respectively connected to different delivery pipelines, so that different media are simultaneously delivered to the spray gun rod 1, and the different media are mixed in the inner cavity of the spray gun rod 1.

[0054] For example, water, dry powder or inert gas can be delivered to the spray gun rod 1 through the first medium inlet 8 , and additives such as foam fire extinguishing agent can be delivered to the spray gun rod 1 through the second medium inlet 9 .

[0055] In a specific embodiment, the spray gun rod 1 can be configured as a straight tube, so that the first end opening of the spray gun rod 1 serves as the first medium inlet 8. A through hole is provided on the side wall of the first end of the spray gun rod 1, and the through hole can serve as the second medium inlet 9.

[0056] Different fire extinguishing needs require different fire extinguishing media. For fire extinguishing of wood, firewood, cotton stacks, etc., water can be used as the fire extinguishing medium, and high-pressure spray can be used for fire extinguishing, which is low in cost and high in efficiency. For fire extinguishing of batteries and circuits, inert gases such as heptafluoropropane can be used as fire extinguishing agents.

[0057] Different fire extinguishing media require different atomizing nozzles 5, and the atomizing nozzle 5 can be detachably mounted in the mounting hole, so that the atomizing nozzle 5 can be detachably mounted, and the atomizing nozzle 5 can be easily replaced for different fire extinguishing media. For the detachable connection between the atomizing nozzle 5 and the nozzle head 2, the atomizing nozzle 5 can be connected to the mounting hole of the nozzle head 2, or the atomizing nozzle 5 and the nozzle head 2 can be fastened together with screws.

[0058] The spray gun head and the spray gun rod 1 can also be set as a detachable connection structure to achieve the detachability of the spray gun head. The piercing fire extinguishing device includes a plurality of spray gun heads, and different spray gun heads are provided with different atomizing nozzles 5. The spray gun heads can be replaced for different fire extinguishing media. For the detachable connection between the spray gun head and the spray gun rod 1, the spray gun head can be threadedly connected to the spray gun rod 1.

[0059] In some embodiments, the puncture portion 3 is detachably connected to the nozzle head 2, and the nozzle head 2 is detachably connected to the spray gun rod 1. For different fire extinguishing media, only the nozzle head 2 can be replaced. Moreover, when the puncture portion 3 is severely damaged and cannot perform the penetration work again, only the puncture portion 3 can be replaced, which can reduce the use cost.

[0060] For the convenience of explanation, it is now stipulated that the end of the spray head 2 close to the spray gun rod 1 is the first end of the spray head 2. In the embodiment of the utility model, along the axis direction of the spray gun rod 1, the projection area of ​​the spray gun rod 1 is located inside the projection area of ​​the first end of the spray head 2.

[0061] It can be understood that when the cross-sectional shape of the spray head 2 and the cross-sectional shape of the spray gun rod 1 are both circular, the outer diameter of the first end of the spray head 2 is greater than the outer diameter of the spray gun rod 1 .

[0062] With such arrangement, when penetrating an obstacle, the spray gun rod 1 will not contact the obstacle, thus avoiding stress on the spray gun rod 1 and reducing the possibility of damage to the spray gun rod 1, which is beneficial to extending the service life of the puncture fire extinguishing device.

[0063] It should be noted that Figure 3 The relative positions of the projection area of ​​the spray gun rod 1 along the axis direction of the spray gun rod 1 and the projection area of ​​the first end of the spray head 2 along the axis direction of the spray gun rod 1 are not illustrated. That is to say, Figure 3 The relationship between the outer diameter of the first end of the spray head 2 and the outer diameter of the spray gun rod 1 is not illustrated.

[0064] In this embodiment, the puncture portion 3 is configured as a variable taper structure.

[0065] Specifically, the puncture portion 3 includes a conical portion 10 and a first frustum portion 11 , the axis of the conical portion 10 coincides with the axis of the spray gun rod 1 , and the outer diameter of the conical portion 10 gradually decreases in a direction away from the spray gun rod 1 .

[0066] The first frustum portion 11 is disposed between the large end of the conical portion 10 and the nozzle head 2 , and the axis of the first frustum portion 11 coincides with the axis of the spray gun rod 1 , and the outer diameter of the first frustum portion 11 gradually decreases in a direction away from the spray gun rod 1 .

[0067] The outer diameters of the conical portion 10 and the first truncated cone portion 11 are consistent with each other. Figure 5 The cone angle of the first truncated cone portion 11 is β, the cone angle of the conical portion 10 is α, and the cone angle of the first truncated cone portion 11 is smaller than the cone angle of the conical portion 10.

[0068] The conical portion 10 and the first truncated cone portion 11 together form the puncture portion 3. The cone angle of the conical portion 10 is relatively large, which can ensure the structural strength of the tip of the puncture portion 3, ensure that it can perform a penetration work again after a penetration work, and ensure the service life of the puncture portion 3. The cone angle of the first truncated cone portion 11 is relatively small, which can ensure the penetration force to the greatest extent.

[0069] In this embodiment, the nozzle head 2 includes a second frustum portion 12 and a cylindrical portion 13. The second frustum portion 12 is arranged on the side of the first frustum portion 11 away from the conical portion 10, and the cylindrical portion 13 is arranged between the second frustum portion 12 and the spray gun rod 1. The axis of the second frustum portion 12 and the axis of the cylindrical portion 13 both coincide with the axis of the spray gun rod 1.

[0070] The average cross-sectional diameter of the second truncated cone portion 12 is greater than the average cross-sectional diameter of the first truncated cone portion 11, and the average cross-sectional diameter is the average diameter on the cross section passing through the central axis. Specifically, the outer diameter of the second truncated cone portion 12 is consistent with the outer diameter of the end close to the first truncated cone portion 11, and the cone angle of the second truncated cone portion 12 is consistent with the cone angle of the first truncated cone portion 11, so that the outer surface of the first truncated cone portion 11 is smoothly connected with the outer surface of the second truncated cone portion 12, avoiding the nozzle head portion 2 from affecting the penetration work of the puncture portion 3.

[0071] The outer diameters of the second truncated cone 12 and the end close to the cylindrical portion 13 are consistent, and the outer diameter of the cylindrical portion 13 is larger than the outer diameter of the spray gun rod 1. When penetrating an obstacle, the spray gun rod 1 will not contact the obstacle, avoiding the spray gun rod 1 from being stressed, reducing the possibility of damage to the spray gun rod 1, and helping to extend the service life of the puncture fire extinguishing device.

[0072] On the other hand, an embodiment of the utility model further provides a fire truck, comprising a fire truck body and the piercing fire extinguishing device provided in any of the above embodiments. The spray gun rod 1 of the piercing fire extinguishing device is arranged at the end of the arm of the fire truck body, and the first end of the spray gun rod 1 of the piercing fire extinguishing device is connected to a delivery pipeline for delivering a fire extinguishing medium on the arm of the fire truck body. The piercing fire extinguishing device provided in the above embodiments has a high fire extinguishing efficiency, and therefore, the fire truck provided in this embodiment also has a high fire extinguishing efficiency. The derivation process of the beneficial effects of the fire truck in the embodiment of the utility model is generally similar to the derivation process of the beneficial effects of the above piercing fire extinguishing device, and therefore will not be repeated here.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A puncture fire extinguishing device, characterized in that: include: A spray gun rod having a first end and a second end, wherein the first end of the spray gun rod is suitable for connecting to a delivery pipeline for delivering a fire extinguishing medium; A spray gun head is arranged at the second end of the spray gun rod, and the spray gun head includes a spray head and a puncture part which are connected to each other. The spray head is arranged between the puncture part and the spray gun rod. The spray head is provided with a conveying channel and a mounting hole. The conveying channel is connected to the inner cavity of the spray gun rod, and the mounting hole is connected to the conveying channel. An atomizing nozzle is arranged in at least part of the mounting hole.

2. The piercing fire extinguishing device according to claim 1, characterized in that: At least two groups of mounting holes are arranged along the axial direction of the spray gun rod, each group of mounting holes includes at least two mounting holes, and each group of mounting holes is spaced apart along the circumference of the spray head.

3. The piercing fire extinguishing device according to claim 2, characterized in that: Among the groups of mounting holes, at least one group of mounting holes close to the spray gun rod is a first mounting hole, and the remaining mounting holes are second mounting holes; The first mounting hole extends from the outer surface of the spray head toward the inside, and the extending direction of the first mounting hole is perpendicular to the axis of the spray gun rod; The second mounting hole extends from the outer surface of the spray head toward the inside, and along the direction from the outer surface of the spray head toward the inside, the second mounting hole gradually moves away from the puncture portion.

4. The piercing fire extinguishing device according to any one of claims 1 to 3, characterized in that: The mounting hole extends from the outer surface of the spray head toward the inside, the atomizing nozzle is arranged inside the mounting hole, and the spraying surface of the atomizing nozzle is located inside the spray head.

5. The piercing fire extinguishing device according to claim 1, characterized in that: The first end of the spray gun rod is provided with a first medium inlet and a second medium inlet, and the first medium inlet and the second medium inlet are both communicated with the inner cavity of the spray gun rod.

6. The piercing fire extinguishing device according to claim 1, characterized in that: One end of the spray head close to the spray gun rod is the first end of the spray head; Along the axial direction of the spray gun rod, the projection area of ​​the spray gun rod is located inside the projection area of ​​the first end of the spray head.

7. The piercing fire extinguishing device according to claim 1, characterized in that: The puncture portion comprises: A conical portion, wherein the axis of the conical portion coincides with the axis of the spray gun rod, and the outer diameter of the conical portion gradually decreases in a direction away from the spray gun rod; The first truncated cone portion is arranged between the conical portion and the spray head portion, and the outer diameter of the first truncated cone portion gradually decreases in a direction away from the spray gun rod.

8. The piercing fire extinguishing device according to claim 7, characterized in that: The nozzle head comprises: A second truncated cone portion is disposed on a side of the first truncated cone portion away from the conical portion, and an average cross-sectional diameter of the second truncated cone portion is greater than an average cross-sectional diameter of the first truncated cone portion; The cylindrical portion is arranged between the second truncated cone portion and the spray gun rod.

9. The piercing fire extinguishing device according to claim 1, characterized in that: The puncture portion is detachably connected to the spray head portion, and the spray head portion is detachably connected to the spray gun rod.

10. A fire truck, characterized in that: It comprises a fire truck body and the piercing fire extinguishing device as claimed in any one of claims 1 to 9, wherein the spray gun rod of the piercing fire extinguishing device is arranged at the end of the arm of the fire truck body.

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