Foam spray gun

Abstract

The utility model belongs to the technical field of cleaning tools, and particularly relates to a foam spray gun which comprises a gun body and an upper cover, an installation cavity is formed between the gun body and the upper cover, an electric pump is installed in the installation cavity, a connecting part used for being connected with a bottle opening is formed at the lower end of the gun body, and a liquid inlet pipe, an air inlet pipe and a pressure relief pipe are arranged in the connecting part. A liquid outlet pipe is arranged at the front end of the gun body, the other end of the liquid outlet pipe is communicated with a liquid inlet pipe, the other end of the liquid inlet pipe is communicated with the output end of the electric pump, and a pressure relief plug is mounted at an upper port of the pressure relief pipe. According to the pressure relief device, the pressure relief plug is pushed to move, high-pressure gas in the bottle is discharged from the pressure relief pipe, the automatic pressure relief effect is achieved, the problem of explosion caused by too high pressure in the bottle can be effectively solved, safety is improved, the pressure relief plug can be pulled to move through the manual operation part, manual pressure relief is achieved, and operation is convenient and easy.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning tools, in particular to a foam spray gun. Background Art

[0002] A sprayer is a device that uses air suction to turn liquid or other liquids into mist and sprays them evenly onto other objects. Existing sprayers spray liquids in mist form. Due to their advantage of a large spray area, sprayers can be applied to cleaning fields.

[0003] For example, the Chinese utility model, application number CN202321638309.4, discloses a foam sprayer with pressure relief and explosion-proof functions, including a bottle body with a cavity, a cover body that is detachably arranged above the bottle body through a locking structure and closes the cavity, a spray assembly for spraying the liquid in the cavity from the bottle body, an air pump assembly for pumping air into the cavity, and a power assembly for providing power for the air pump assembly to operate. The bottle cap has an accommodation cavity, and the spray assembly and the air pump assembly are partially arranged in the accommodation cavity. The sprayer also includes a pressure relief assembly arranged on the cover body or the bottle body, and the pressure relief assembly can discharge excess gas in the cavity to the outside.

[0004] When the sprayer is overfilled with gas, it is easy to produce a situation where the difference between the internal and external air pressure is too large. At this time, because the air pressure inside the sprayer is very high, there is a risk of the sprayer exploding. In the existing technology, the pressure relief component can be manually operated to achieve a pressure relief effect, but it cannot achieve automatic pressure relief. Therefore, this structure needs to be further improved. Utility Model Content

[0005] The utility model aims to provide a foam spray gun which solves the problem that automatic pressure relief cannot be achieved through a pressure relief spring.

[0006] The purpose of the utility model is achieved as follows: a foam spray gun comprises a gun body and an upper cover, an installation cavity is formed between the gun body and the upper cover, an electric pump is installed in the installation cavity, the lower end of the gun body is formed with a connecting part for connecting to the bottle mouth, a liquid inlet pipe, an air inlet pipe and a pressure relief pipe are respectively provided in the connecting part, a liquid outlet pipe is provided at the front end of the gun body, the other end of the liquid outlet pipe is connected with the liquid inlet pipe, and the other end of the air inlet pipe is connected with the output end of the electric pump, a pressure relief plug is installed on the upper port of the pressure relief pipe, the upper end of the pressure relief plug extends out of the upper cover and is provided with a manual operation part, the outer periphery of the pressure relief plug is formed with an abutting part, and a pressure relief spring is abutted between the abutting part and the upper cover.

[0007] Preferably, a sealing portion 1 is formed at the lower end of the pressure relief plug, a sealing ring 1 is installed on the outer periphery of the sealing portion 1, and the sealing ring 1 is located at the lower end surface of the abutting portion.

[0008] Preferably, the upper end of the pressure relief plug extends out of the upper cover and is formed with a cap, and one end of the cap is provided with the manual operating part.

[0009] Preferably, a trigger is installed at the rear end of the gun body, the upper end of the trigger is rotatably connected to the gun body, and a control switch for controlling the opening and closing of the electric pump is provided in the gun body. The control switch is located at the rear side of the trigger and is triggered by the trigger.

[0010] Preferably, a liquid outlet plug that can move forward and backward is provided in the liquid outlet pipe, a sealing part 2 is formed on the outer periphery of the front end of the liquid outlet plug, and a clamping part is formed at the rear end of the liquid outlet plug. A driving member that can move forward and backward is provided in the installation cavity, the rear end of the driving member is rotatably connected to the trigger, and a clamping hole for inserting the clamping part is provided at the front end of the driving member.

[0011] Preferably, a through hole for the clamping portion to pass through is opened at the rear end of the liquid outlet pipe, a liquid outlet spring is abutted between the second sealing portion and the liquid outlet pipe, and a second sealing ring is installed on the outer periphery of the rear end of the liquid outlet plug.

[0012] Preferably, a limiting column is provided in the installation cavity, and a strip-shaped limiting hole for the limiting column to move is provided in the driving member.

[0013] Preferably, a rotating column is installed at the rear end of the driving member, and a rotating hole is opened in the trigger.

[0014] Preferably, a flow channel is formed in the connecting portion, and the liquid outlet pipe and the liquid inlet pipe are connected through the flow channel.

[0015] Preferably, rotating shafts are respectively formed on both sides of the upper end of the trigger, and a mounting seat is provided on the side wall of the mounting cavity, and a rotating groove for installing the rotating shaft is opened in the mounting seat.

[0016] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0017] The utility model adopts the design of the pressure relief spring, so that when the pressure in the bottle is too high, the elastic force of the spring will be overcome, thereby pushing the pressure relief plug to move, so that the high-pressure gas in the bottle is discharged from the pressure relief pipe, thereby achieving the effect of automatic pressure relief, which can effectively reduce the problem of explosion caused by excessive pressure in the bottle and improve safety. In addition, the pressure relief plug can be pulled to move by the manual operating part to achieve manual pressure relief, which is convenient and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .

[0020] Figure 3 It is a side structural schematic diagram of the present utility model.

[0021] Figure 4 for Figure 3 Schematic diagram of the structural cross-section at AA in the middle.

[0022] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0023] Figure 6 for Figure 3 Schematic diagram of the structural cross-section at BB in the middle.

[0024] Figure 7 It is a structural diagram of the gun body and electric pump.

[0025] Figure 8 It is a structural diagram of the gun body and driving parts.

[0026] Figure 9 This is a schematic diagram of the exploded structure of some parts of the utility model.

[0027] Figure markings: 1-gun body; 2-upper cover; 3-installation cavity; 4-electric pump; 5-connecting part; 6-liquid inlet pipe; 7-air inlet pipe; 8-pressure relief pipe; 9-liquid outlet pipe; 10-pressure relief plug; 11-manual operation part; 12-rest part; 13-pressure relief spring; 14-sealing part 1; 15-sealing ring 1; 17-cap; 18-trigger; 19-control switch; 20-liquid outlet plug; 21-sealing part 2; 22-clamping part; 23-driving part; 24-clamping hole; 25-through hole; 26-liquid outlet spring; 27-sealing ring 2; 28-limiting column; 29-strip limiting hole; 30-rotating column; 31-rotating hole; 32-flow channel; 33-rotating shaft; 34-mounting seat; 35-rotating groove. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-9As shown, a foam spray gun comprises a gun body 1 and an upper cover 2, an installation cavity 3 is formed between the gun body 1 and the upper cover 2, an electric pump 4, a circuit board, and a battery are installed in the installation cavity 3, a connecting part 5 is formed at the lower end of the gun body 1, and an internal thread for connecting to the bottle mouth is formed on the inner periphery of the connecting part 5, a liquid inlet pipe 6, an air inlet pipe 7 and a pressure relief pipe 8 are respectively provided in the connecting part 5, a liquid outlet pipe 9 is provided at the front end of the gun body 1, the other end of the liquid outlet pipe 9 is connected with the liquid inlet pipe 6, and the other end of the air inlet pipe 7 is connected with the output end of the electric pump 4, a pressure relief plug 10 is installed at the upper end of the pressure relief pipe 8, the upper end of the pressure relief plug 10 extends out of the upper cover 2 and is provided with a manual operation part 11, the outer periphery of the pressure relief plug 10 is formed with an abutting part 12, and a pressure relief spring 13 is abutted between the abutting part 12 and the upper cover 2.

[0030] The utility model adopts the design of the pressure relief spring, so that when the pressure in the bottle is too high, the elastic force of the spring will be overcome, thereby pushing the pressure relief plug 10 to move, so that the high-pressure gas in the bottle is discharged from the pressure relief pipe 8, thereby achieving the effect of automatic pressure relief, which can effectively reduce the problem of explosion caused by excessive pressure in the bottle and improve safety. In addition, the pressure relief plug can be pulled to move by the manual operating part 11 to achieve manual pressure relief, which is convenient and simple to operate.

[0031] Combine Figure 4 and Figure 5 The lower end of the pressure relief plug 10 is formed with a sealing part 14, and a sealing ring 15 is installed on the outer periphery of the sealing part 14. The sealing ring 15 is located on the lower end surface of the abutment part 12. Under normal conditions, the spring relies on its own elastic force to keep the sealing part 14 in the pressure relief pipe 8, and keeps the sealing ring 15 on the lower end surface of the abutment part 12 against the upper end opening of the pressure relief pipe to seal the pressure relief pipe.

[0032] Combine Figure 5 and Figure 9 The upper end of the pressure relief plug 10 extends out of the upper cover 2 and is formed with a cap 17. One end of the cap 17 is provided with the manual operation part 11. Therefore, in actual use, the cap 17 is pulled upward by the manual operation part 11 to drive the pressure relief plug 10 to move upward, thereby releasing the seal of the pressure relief pipe and achieving a manual pressure relief effect.

[0033] Combine Figure 6 and Figure 8 A trigger 18 is installed at the rear end of the gun body 1. The upper end of the trigger 18 is rotatably connected to the gun body 1. A control switch 19 for controlling the opening and closing of the electric pump 4 is provided in the gun body 1. The control switch 19 is located on the rear side of the trigger 18. When the trigger 18 is pressed, the trigger will move backward, thereby touching the electric contact of the control switch 19, thereby controlling the opening and closing of the electric pump.

[0034] Combine Figure 6 and Figure 9 , a liquid outlet plug 20 that can move back and forth is provided in the liquid outlet pipe 9, and a sealing portion 21 is formed on the outer periphery of the front end of the liquid outlet plug 20, and a clamping portion 22 is formed at the rear end of the liquid outlet plug 20. A driving member 23 that can move back and forth is provided in the mounting cavity 3, and the rear end of the driving member 23 is rotatably connected to the trigger 18, and a clamping hole 24 is provided at the front end of the driving member 23 for inserting the clamping portion 22. The present technical solution can block the liquid outlet pipe 9 when the trigger 18 is not operated through the design of the liquid outlet plug 20, thereby preventing liquid from leaking from the liquid outlet pipe 9. When the trigger 18 is operated, the driving member 23 will be linked to drive the liquid outlet plug 20 to move backward, so that the sealing portion 21 blocks the position of the liquid outlet pipe 9. At the same time, the electric pump operates to apply pressure to the bottle, and the liquid in the bottle can be sprayed out from the liquid outlet pipe 9.

[0035] Combine Figure 6 and Figure 9 A through hole 25 is provided at the rear end of the liquid outlet pipe 9 for the clamping portion 22 to pass through. A liquid outlet spring 26 is abutted between the sealing portion 21 and the liquid outlet pipe 9. After the trigger 18 is released, the spring can automatically reset the liquid outlet plug 20. A sealing ring 27 is installed on the outer periphery of the rear end of the liquid outlet plug 20 to improve the sealing performance and prevent liquid from entering the installation cavity 3 from the through hole 25.

[0036] Combine Figure 6 and Figure 8 A limiting column 28 is provided in the installation cavity 3, and a strip-shaped limiting hole 29 is opened in the driving member 23 for the limiting column 28 to move, thereby limiting the front and rear displacement range of the driving member 23.

[0037] Combine Figure 6 and Figure 9 A rotating column 30 is installed at the rear end of the driving member 23, and a rotating hole 31 is opened in the trigger 18, thereby realizing a rotational connection between the two.

[0038] Look specifically Figure 6 A flow channel 32 is formed in the connecting portion 5 , and the liquid outlet pipe 9 and the liquid inlet pipe 6 are connected through the flow channel 32 .

[0039] Rotating shafts 33 are formed on both sides of the upper end of the trigger 18 , and a mounting seat 34 is provided on the side wall of the mounting cavity 3 . A rotating groove 35 for mounting the rotating shaft 33 is defined in the mounting seat 34 .

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A foam spray gun, characterized in that: The invention comprises a gun body (1) and an upper cover (2), wherein an installation cavity (3) is formed between the gun body (1) and the upper cover (2), an electric pump (4) is installed in the installation cavity (3), a connecting portion (5) for connecting to a bottle mouth is formed at the lower end of the gun body (1), a liquid inlet pipe (6), an air inlet pipe (7) and a pressure relief pipe (8) are respectively arranged in the connecting portion (5), a liquid outlet pipe (9) is arranged at the front end of the gun body (1), the other end of the liquid outlet pipe (9) is connected to the liquid inlet pipe (6), and the other end of the air inlet pipe (7) is connected to the output end of the electric pump (4), a pressure relief plug (10) is installed at the upper end of the pressure relief pipe (8), the upper end of the pressure relief plug (10) extends out of the upper cover (2) and is provided with a manual operation portion (11), a supporting portion (12) is formed on the outer periphery of the pressure relief plug (10), and a pressure relief spring (13) is abutted between the supporting portion (12) and the upper cover (2).

2. The foam spray gun according to claim 1, characterized in that: The lower end of the pressure relief plug (10) is formed with a sealing portion (14), and a sealing ring (15) is installed on the outer periphery of the sealing portion (14), and the sealing ring (15) is located on the lower end surface of the abutting portion (12).

3. The foam spray gun according to claim 1 or 2, characterized in that: The upper end of the pressure relief plug (10) extends out of the upper cover (2) and is formed with a cover cap (17), and one end of the cover cap (17) is provided with the manual operating portion (11).

4. The foam spray gun according to claim 1, characterized in that: A trigger (18) is installed at the rear end of the gun body (1), and the upper end of the trigger (18) is rotatably connected to the gun body (1). A control switch (19) for controlling the opening and closing of the electric pump (4) is provided in the gun body (1). The control switch (19) is located at the rear side of the trigger (18) and is triggered by the trigger (18).

5. The foam spray gun according to claim 1 or 4, characterized in that: A liquid outlet plug (20) that can move forward and backward is provided in the liquid outlet pipe (9), a sealing portion (21) is formed on the outer periphery of the front end of the liquid outlet plug (20), and a clamping portion (22) is formed on the rear end of the liquid outlet plug (20). A driving member (23) that can move forward and backward is provided in the installation cavity (3), the rear end of the driving member (23) is rotatably connected to the trigger (18), and a clamping hole (24) for inserting the clamping portion (22) is provided at the front end of the driving member (23).

6. The foam spray gun according to claim 5, characterized in that: The rear end of the liquid outlet pipe (9) is provided with a through hole (25) for the clamping portion (22) to pass through, a liquid outlet spring (26) is abutted between the second sealing portion (21) and the liquid outlet pipe (9), and a second sealing ring (27) is installed on the outer periphery of the rear end of the liquid outlet plug (20).

7. The foam spray gun according to claim 5, characterized in that: A limiting column (28) is provided in the installation cavity (3), and a strip-shaped limiting hole (29) for the limiting column (28) to move is provided in the driving member (23).

8. The foam spray gun according to claim 5, characterized in that: A rotating column (30) is installed at the rear end of the driving member (23), and a rotating hole (31) is opened in the trigger (18).

9. The foam spray gun according to claim 1, characterized in that: A flow channel (32) is formed in the connecting portion (5), and the liquid outlet pipe (9) and the liquid inlet pipe (6) are connected through the flow channel (32).

10. The foam spray gun according to claim 5, characterized in that: Rotating shafts (33) are respectively formed on both sides of the upper end of the trigger (18), and a mounting seat (34) is provided on the side wall of the mounting cavity (3). A rotating groove (35) for mounting the rotating shaft (33) is provided in the mounting seat (34).

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