CN210873864U - Foam gun device - Google Patents

Abstract

The utility model provides a foam gun device, include: the device comprises a pipe thread interface, a gun body ball valve, a main injection gun body, a gun body injection cylinder, a mixing ratio mechanism, a liquid conveying pipe and a foam stock solution barrel; a liquid outlet is arranged on the foam stock solution barrel and is communicated with an inlet of a liquid conveying pipe, and an outlet of the liquid conveying pipe is communicated with the main injection gun body, so that the foam stock solution in the foam stock solution barrel is conveyed into the main injection gun body through the liquid conveying pipe; the rear end of the main injection gun body is sequentially provided with a gun body ball valve and a pipe thread interface, and the front end of the main injection gun body is provided with a gun body injection cylinder; the mixing ratio mechanism is arranged on an outlet of the infusion tube and an interface of the main injection gun body, so that the suction volume of the foam stock solution is controlled on site in real time, and the foam mixing ratio mechanism is used for realizing the function of spraying foam mixed liquid with different concentration mixing ratios or spraying pure pressure water only to extinguish fire.

Description

Foam gun device

Technical Field

The utility model relates to a fire control field particularly, especially, relates to a foam gun device.

Background

The traditional medium-expansion foam gun has single foam mixing ratio and heavy structure. The concentration ratio of the foam mixed liquid is fixed, and manual selection on site cannot be carried out. This can lead to reduced field options; some medium-expansion foam guns need to be provided with a fire pump, and foam mixed liquid is conveyed into a gun body by the fire pump to be foamed and sprayed. The structure is heavy, the accessories are more, and a special driving power source needs to be provided for the fire pump.

Disclosure of Invention

According to the above mentioned problems, the foam mixing ratio of the foam gun is single, and the foam concentration mixing ratio can not be adjusted on site; the foam gun device has the technical problems of heavy structure, excessive accessories and the like. The utility model discloses mainly utilize mixing ratio mechanism to what of on-spot real time control foam stoste suction volume for the function that the foam that realizes spraying different concentration mixing ratios mixes the liquid, perhaps only sprays pure pressurized water is put out a fire.

The utility model discloses a technical means as follows:

a foam gun apparatus comprising: the device comprises a pipe thread interface, a gun body ball valve, a main injection gun body, a gun body injection cylinder, a mixing ratio mechanism, a liquid conveying pipe and a foam stock solution barrel; a liquid outlet is arranged on the foam stock solution barrel and is communicated with an inlet of a liquid conveying pipe, and an outlet of the liquid conveying pipe is communicated with the main injection gun body, so that the foam stock solution in the foam stock solution barrel is conveyed into the main injection gun body through the liquid conveying pipe; the rear end of the main injection gun body is sequentially provided with a gun body ball valve and a pipe thread interface, and the front end of the main injection gun body is provided with a gun body injection cylinder; the mixing ratio mechanism is arranged on an interface between the outlet of the infusion tube and the main injection gun body.

Furthermore, the pipe thread interface is communicated with a fire hydrant or a fire pump or is sealed by a blank cap.

Further, the mixing ratio mechanism comprises a liquid suction cavity, a liquid suction cavity rear cover, a piston rod, a transparent cover and a mixing ratio scale wheel, a liquid outlet cavity is arranged at the upper end of the liquid suction cavity, a liquid inlet cavity is arranged at the lower end of the liquid suction cavity, a slotted hole for accommodating the piston rod is formed in the middle of the liquid suction cavity, the piston rod is perpendicular to the liquid suction cavity, an installation positioning structure is arranged on the piston rod, the liquid suction cavity rear cover is arranged at one end of the piston rod, the transparent cover is arranged at the other end of the piston rod, a through hole for the liquid outlet cavity and the liquid inlet cavity is formed by the end face of the piston rod and the transparent cover, the mixing ratio scale wheel is arranged at the outer end of the.

Furthermore, the rear cover of the liquid suction cavity is provided with a first screw, the front end of the first screw is in threaded fit with the piston rod, a first spring is arranged between the rear cover of the liquid suction cavity and a slotted hole of the liquid suction cavity, and a first sealing ring is arranged between the outer wall of the piston rod and the slotted hole of the liquid suction cavity.

Furthermore, the mixing ratio scale wheel is fixed on the piston rod through a second screw, a groove for accommodating the second spring and a steel ball is processed on the liquid suction cavity, and the steel ball is matched with a steel ball track on the inner side of the mixing ratio scale wheel;

and a second sealing ring is arranged between the piston rod and the transparent cover, and a third sealing ring is arranged between the transparent cover and the slotted hole of the liquid suction cavity.

Furthermore, a gun locking mechanism for locking the main injection gun body is arranged on the foam stock solution barrel, and the mechanism has positive significance in the storage of products in severe environments. For example, when the product is applied to a ship, the foam raw liquid barrel can be fixed firstly, and then the gun body is fixed on the foam raw liquid barrel by using the gun locking mechanism, so that the gun body is prevented from falling off due to shaking and bumping of the ship, and personnel and equipment in the ship can be effectively protected.

Further, the gun locking mechanism comprises a lock, a left semicircular locking plate, a first hinge, a right semicircular locking plate, a second hinge, a movable support and a welding support; the welding support welding is in on the foam stoste bucket, install on it the movable support, the movable support articulates through hinge two has right semicircle locking plate, right semicircle locking plate articulates through hinge one has left semicircle locking plate, right semicircle locking plate adopts lock locking fixed with left semicircle locking plate.

Further, the liquid outlet of foam stoste bucket with be equipped with between the entry of transfer line and prevent the refluence mechanism, this structure can effectively prevent that the internal foam of main injection gun from mixing liquid or pressure water refluence and getting into foam stoste bucket, avoids causing the pollution inefficacy waste of foam stoste, reduces the unnecessary wasting of resources of user.

Furthermore, the backflow preventing mechanism comprises a barrel cover quick plug connector, a steel wire retainer ring, a backflow preventing ball and an elastic retainer ring for the shaft; the barrel cover quick connector is connected to the liquid outlet in an inserting mode, a steel wire check ring is arranged at the upper end of a cavity in the barrel cover quick connector, an elastic check ring for a shaft is arranged at the lower end of the cavity, and a backflow-preventing ball body is arranged between the steel wire check ring and the elastic check ring for the shaft.

Further, the mixing ratio scale wheel comprises four-gear adjustment which is respectively an OFF position, a 1% position, a 3% position and a 6% position, wherein the 1% position, the 3% position and the 6% position are respectively used for controlling the percentage of the foam stock solution in the main injection gun body to the foam mixed solution.

Compared with the prior art, the utility model has the advantages of it is following:

1. foam gun device is equipped with the mixing ratio scale wheel, adopts on the main injection gun body to have unique mixing ratio structural design, what that this structure can on-spot real time control foam stoste suction volume for the foam that realizes spraying different concentration mixing ratios mixes liquid, perhaps only sprays the function of pure pressurized water.

2. Foam rifle device is provided with on foam stoste bung and prevents the refluence device, and its function is for preventing to be mixed liquid of foam stoste or the foam of suction and flow back to foam stoste bucket, causes foam stoste to pollute or become invalid.

3. Foam gun device is provided with the lock rifle mechanism of placing the main injection rifle body on the former liquid bucket of foam, and this mechanism can fix the main injection rifle body on the former liquid bucket of foam, can prevent that the rifle body that the mistake bumped or leads to under the adverse circumstances from damaging.

Foam gun device has wide market prospect in places such as petrochemical, naval vessels, fire brigade, shopping mall, is a foam spray gun for putting out a fire.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a general schematic diagram of the present invention.

Fig. 2 is a schematic view of the mixing ratio mechanism of the present invention.

Fig. 3 shows the backflow preventing mechanism of the present invention.

Fig. 4 shows the gun locking mechanism of the present invention.

In the figure: 1. the device comprises a blank cap, a pipe thread interface, a gun body ball valve, a main injection gun body, a gun body injection cylinder, a main injection gun body injection cylinder, a main injection gun body mixing mechanism, a main injection gun body mixing;

601. the liquid suction device comprises a liquid suction cavity, 602, a liquid suction cavity rear cover, 603, a first screw, 604, a first spring, 605, a piston rod, 606, a first sealing ring, 607, a second spring, 608, a steel ball, 609, a transparent cover, 610, a second screw, 611, a second sealing ring, 612, a mixing ratio scale wheel, 613 and a third sealing ring;

801. a barrel cover quick plug connector 802, a steel wire retainer ring 803, a backflow prevention ball 804 and an elastic retainer ring for a shaft;

901. the lock comprises a lock body 902, a left semicircular locking plate 903, a first hinge 904, a right semicircular locking plate 905, a second hinge 906, a movable support 907 and a welding support.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 4, the utility model provides a foam gun device, include: the device comprises a pipe thread connector 2, a gun body ball valve 3, a main injection gun body 4, a gun body injection cylinder 5, a mixing ratio mechanism 6, a liquid conveying pipe 7 and a foam raw liquid barrel 8, wherein a liquid outlet is formed in the foam raw liquid barrel 8 and is communicated with an inlet of the liquid conveying pipe 7, and an outlet of the liquid conveying pipe 7 is communicated with the main injection gun body 4, so that foam raw liquid in the foam raw liquid barrel 8 is conveyed into the main injection gun body 4 through the liquid conveying pipe 7; the rear end of the main injection gun body 4 is sequentially provided with a gun body ball valve 3 and a pipe thread connector 2, and the front end is provided with a gun body injection cylinder 5; the mixing ratio mechanism 6 is provided at an interface between the outlet of the infusion tube 7 and the main injection gun body 4.

In the embodiment, the pipe tap interface 2 is communicated with a fire hydrant or a fire pump, or is closed by a blank cap 1. When the device is used, the blank cap 1 is taken down, the pipe thread connector 2 is connected with a fire hydrant or a fire pump, the gun body ball valve 3 is opened, the fire hydrant or the fire pump is opened, a pressure water source enters the gun body ball valve 3 from the pipe thread connector 2 and then passes through the main injection gun body 4, negative pressure is formed in the main injection gun body 4, and therefore foam raw liquid in the foam raw liquid barrel 8 is sucked and enters the main injection gun body 4 through the backflow preventing mechanism, the liquid conveying pipe 7 and the mixing ratio mechanism to be mixed with the pressure water source to form foam mixed liquid, and the foam mixed liquid is foamed and sprayed through a fine net on the gun body injection barrel 5 to extinguish fire. And the utility model discloses do not need to dispose fire pump specially, can effectively practice thrift space and energy.

In this embodiment, as shown in fig. 2, the mixing ratio mechanism 6 includes a liquid suction cavity 601, a liquid suction cavity rear cover 602, a piston rod 605, a transparent cover 609 and a mixing ratio scale wheel 612, the liquid suction cavity 601 has a liquid outlet cavity at the upper end, a liquid inlet cavity at the lower end, a slot hole for accommodating the piston rod 605 at the middle, the piston rod 605 is disposed perpendicular to the liquid suction cavity 601, the piston rod has a mounting and positioning structure, the piston rod 605 has the liquid suction cavity rear cover 602 at one end and the transparent cover 609 at the other end, a through hole communicating the liquid outlet cavity and the liquid inlet cavity is formed by the end surface of the piston rod 605 and the transparent cover 609, the mixing ratio scale wheel 612 is disposed at the outer end of the transparent cover 609, the mixing ratio scale wheel 612 rotates to drive the piston rod 605 to rotate, the cross-sectional area of the through hole is controlled, the mixing ratio scale wheel 612 on the, the required concentration mixing ratio can be obtained. The mixing ratio can be selected in various ways, and preferably, the mixing ratio mechanism has 5 points, 4 choices: 2 OFF bits, 1% bit, 1 3% bit, 1 6% bit. Can be used for the user to make various selections. When the selection position is OFF, the mixing ratio mechanism is closed, the foam stock solution cannot be sucked, and pure pressure water is sprayed. When the selection position is "1%", "3%" or "6%", it means that the percentage of the foam mixture concentration in the main spray gun body is 1%, 3% or 6%, respectively, and should be within an allowable error range.

The concentration ratio of the foam mixture can be selected on site by the mixing ratio mechanism 6, and foam can be saved or the foam mixing mechanism can be applied to places where foam is not sprayed. The foam stock solution is not required to be mixed with water in advance through the mixing ratio mechanism 6, so that the waste caused by the possible excessive use or surplus of the foam stock solution is avoided, the time for preparing the foam mixed solution can be saved, and the time for extinguishing the fire is favored. The foam stock solution barrel cover is taken down, the foam stock solution can be added into the foam stock solution barrel at any time, and the foam mixed solution can be continuously sprayed as long as the water source is uninterrupted. The addition of the foam concentrate is performed without interrupting the spray so as not to lose effective fire control.

The back cover 602 of the imbibing cavity is provided with a first screw 603, the front end of the first screw 603 is in threaded fit with the piston rod 605, a first spring 604 is arranged between the back cover 602 of the imbibing cavity and a slotted hole of the imbibing cavity 601, and a first sealing ring 606 is arranged between the outer wall of the piston rod 605 and the slotted hole of the imbibing cavity 601. The mixing ratio dial wheel 612 is fixed on the piston rod 605 through a second screw 610, a groove for accommodating the second spring 607 and a steel ball 608 is processed on the liquid suction cavity 601, and the steel ball 608 is matched with a steel ball track on the inner side of the mixing ratio dial wheel 612; a second sealing ring 611 is arranged between the piston rod 605 and the transparent cover 609, and a third sealing ring 613 is arranged between the transparent cover 609 and the slotted hole of the liquid suction cavity 601. The mixing ratio dial 612 comprises four-gear adjustment, which is respectively an OFF position, a 1% position, a 3% position and a 6% position, wherein the 1% position, the 3% position and the 6% position are respectively used for controlling the percentage of the foam stock solution in the main injection gun body 4 to the foam mixed solution.

In the present embodiment, as shown in fig. 4, a gun locking mechanism 9 for locking the main injection gun body 4 is provided on the foam raw liquid tank 8. The gun locking mechanism 9 comprises a lock 901, a left semicircular locking plate 902, a first hinge 903, a right semicircular locking plate 904, a second hinge 905, a movable bracket 906 and a welding bracket 907; the movable support 906 is hinged with a right semicircular locking plate 904 through a hinge two 905, a left semicircular locking plate 902 and a hinge one 903 are arranged on the right semicircular locking plate, and the right semicircular locking plate 904 and the left semicircular locking plate 902 are locked and fixed through a lock 901. When the utility model discloses when not using, can place the rifle body in locking rifle mechanism, lock 901 locks prevents that the rifle body from droing the collision and leading to danger.

In the present embodiment, as shown in fig. 3, a backflow prevention mechanism is provided between the liquid outlet of the foam raw liquid tank 8 and the inlet of the infusion tube 7. The backflow preventing mechanism comprises a barrel cover quick plug-in connector 801, a steel wire retaining ring 802, a backflow preventing ball 803 and an elastic retaining ring 804 for a shaft; the barrel cover quick-plugging connector 801 is plugged into the liquid outlet, a steel wire retaining ring 802 is arranged at the upper end of a cavity in the barrel cover quick-plugging connector 801, an elastic retaining ring 804 for a shaft is arranged at the lower end of the cavity, and a backflow-preventing ball 803 is arranged between the steel wire retaining ring 802 and the elastic retaining ring 804 for the shaft. When the spraying is interrupted or finished and no pressure water flows in the gun body, the backflow-preventing ball 803 in the backflow-preventing mechanism falls to a channel port below the ball under the self gravity and the pressure of the liquid in the mixing ratio mechanism to seal the channel, so that the sucked liquid is prevented from flowing backwards into the foam stock solution barrel, and the pollution and failure of the foam stock solution in the foam stock solution barrel are prevented.

In the present embodiment, the pipe thread interface 2, the gun ball valve 3, the gun body injection cylinder 5, the mixing ratio mechanism 6, and the main injection gun body 4 are assembled by screw connection, and the joint is sealed by a seal ring or a gasket. The infusion tube 7 is connected with the main injection gun body 4 and the foam stock solution barrel by adopting a quick connector so as to achieve the purposes of quick connection and replacement. The fine net on the gun body injection cylinder 5 is fixed on the gun body injection cylinder by adopting a rivet fixing structure. The barrel body of the foam stock solution barrel 8 is provided with braces for carrying.

Foam gun device is a well multiple foam gun, and pressure water is connected to main injection gun body 4, realizes spraying the function. The foam stock solution barrel 8 is used for containing foam stock solution. The liquid conveying pipe 7 is connected with the main injection gun body 4 and the foam stock solution barrel 8, so that the function of conveying the foam stock solution to the main injection gun body is realized, and pressure water is used as a power source. When pressure water flows through the interior of the main injection gun body, negative pressure is formed through a Venturi principle, foam stock solution is sucked through a liquid conveying pipe, the foam stock solution and the pressure water are mixed in the main injection gun body to form foam mixed solution, and then the foam mixed solution is sprayed out from the gun body to extinguish fire.

Foam gun device, simple structure, convenient operation, powerful can effectively solve the problem that multiple foam kinetic energy is low, the range is little, improves the speed of control conflagration. Compared with the traditional fire extinguisher, the fire extinguishing time is greatly shortened, the fire extinguishing efficiency is improved, people can control the fire more favorably and effectively, the fire can be put out in a fixed mode, and people can carry the fire to remove the fire. When people carry the fire extinguishing device to carry on their back, the fire hose is connected with the pressure water source and the main injection gun body.

Foam gun device is put out a fire class product with the foam of foam mixed liquid as spraying medium, is not only the deepening to prior art and masters, also the process of application field innovation, and this comprehensive technique is used in the fire control field and is had realistic meaning. The product is a novel high-efficiency fire fighting device.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A foam gun apparatus, comprising: the device comprises a pipe thread interface, a gun body ball valve, a main injection gun body, a gun body injection cylinder, a mixing ratio mechanism, a liquid conveying pipe and a foam stock solution barrel;

a liquid outlet is arranged on the foam stock solution barrel and is communicated with an inlet of a liquid conveying pipe, and an outlet of the liquid conveying pipe is communicated with the main injection gun body, so that the foam stock solution in the foam stock solution barrel is conveyed into the main injection gun body through the liquid conveying pipe;

the rear end of the main injection gun body is sequentially provided with a gun body ball valve and a pipe thread interface, and the front end of the main injection gun body is provided with a gun body injection cylinder;

the mixing ratio mechanism is arranged on the interface between the outlet of the infusion tube and the main injection gun body.

2. Foam gun device according to claim 1,

the pipe thread interface is communicated with a fire hydrant or a fire pump or is sealed by a blank cap.

3. Foam gun device according to claim 1,

the mixing ratio mechanism comprises a liquid suction cavity, a liquid suction cavity rear cover, a piston rod, a transparent cover and a mixing ratio scale wheel, wherein a liquid outlet cavity is arranged at the upper end of the liquid suction cavity, a liquid inlet cavity is arranged at the lower end of the liquid suction cavity, a slotted hole for accommodating the piston rod is formed in the middle of the liquid suction cavity, the piston rod is perpendicular to the liquid suction cavity, an installation positioning structure is arranged on the piston rod, the liquid suction cavity rear cover is arranged at one end of the piston rod, the transparent cover is arranged at the other end of the piston rod, the end face of the piston rod and the transparent cover form through holes of the liquid outlet cavity and the liquid inlet cavity, the mixing ratio scale wheel is arranged at the outer end of the.

4. Foam gun device according to claim 3,

the back cover of the imbibition cavity is provided with a first screw, the front end of the first screw is in threaded fit with the piston rod, a first spring is arranged between the back cover of the imbibition cavity and a slotted hole of the imbibition cavity, and a first sealing ring is arranged between the outer wall of the piston rod and the slotted hole of the imbibition cavity.

5. Foam gun device according to claim 3,

the mixing ratio scale wheel is fixed on the piston rod through a second screw, a groove for accommodating a second spring and a steel ball is processed on the liquid suction cavity, and the steel ball is matched with a steel ball track on the inner side of the mixing ratio scale wheel;

and a second sealing ring is arranged between the piston rod and the transparent cover, and a third sealing ring is arranged between the transparent cover and the slotted hole of the liquid suction cavity.

6. Foam gun device according to claim 1,

and a gun locking mechanism for locking the main injection gun body is arranged on the foam stock solution barrel.

7. Foam gun device according to claim 6,

the gun locking mechanism comprises a lock, a left semicircular locking plate, a first hinge, a right semicircular locking plate, a second hinge, a movable support and a welding support;

the welding support is welded on the foam stoste bucket, and is provided with the movable support, the movable support passes through hinge two articulates there is right side semicircle locking plate, right side semicircle locking plate passes through hinge one articulates there is left side semicircle locking plate, right side semicircle locking plate and left semicircle locking plate adopt lock locking to fix.

8. Foam gun device according to claim 1,

and a backflow preventing mechanism is arranged between the liquid outlet of the foam raw liquid barrel and the inlet of the liquid conveying pipe.

9. Foam gun device according to claim 8,

the backflow preventing mechanism comprises a barrel cover quick-connection plug, a steel wire retainer ring, a backflow preventing ball and an elastic retainer ring for a shaft;

the barrel cover quick connector is connected to the liquid outlet in an inserting mode, a steel wire check ring is arranged at the upper end of a cavity in the barrel cover quick connector, an elastic check ring for a shaft is arranged at the lower end of the cavity, and a backflow-preventing ball body is arranged between the steel wire check ring and the elastic check ring for the shaft.

10. Foam gun device according to claim 3, 4 or 5,

the mixing ratio scale wheel comprises four-gear adjustment, namely an OFF position, a 1% position, a 3% position and a 6% position, wherein the 1% position, the 3% position and the 6% position are respectively used for controlling the percentage of foam stock solution in the main injection gun body to the foam mixed solution.

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