Foam nozzle and foam spray gun with same

Abstract

The utility model relates to the technical field of spraying equipment, and discloses a foam nozzle and a foam spray gun with the foam nozzle, the foam nozzle comprises a nozzle seat (2) in threaded connection with a spray gun body (1), an inner pipe (3) is arranged in the nozzle seat (2), the inner pipe (3) is provided with a liquid outlet (31) communicated with a liquid outlet channel in the spray gun body (1), the nozzle seat (2) is provided with a nozzle opening (21) communicated with the inner pipe (3), and the nozzle opening (21) is communicated with the inner pipe (3). And the nozzle holder (2) is detachably connected with a foam connecting plug (4) so as to disassemble and assemble the foam connecting plug (4) to realize the functions of mist spraying and foam spraying.

Description

Technical Field

[0001] The utility model relates to the technical field of spray equipment, in particular to a foam nozzle and a foam spray gun with the foam nozzle. Background Art

[0002] The liquid spray gun is a simple and effective liquid atomization device, which is widely used in household chemical cleaners, automobile protection, gardening products, animal care products, furniture polishing products and other fields. Its working principle is to increase the air pressure in the spray pot through the reciprocating motion of the trigger, so that the liquid in the pot is sprayed out; after the liquid is sprayed out, the trigger automatically returns to its position under the action of the spring.

[0003] Existing spray guns can be divided into spray guns and foam guns according to different nozzles. Spray guns and foam guns usually cannot use the nozzle of a sprayer. For example, the announcement number is CN2353453Y, which discloses an intermittent spray device. When the liquid in the container is sprayed out by the nozzle and a negative pressure is generated, the air in the container is supplemented by the nozzle and then enters the container after the outside air is sucked in. The closing of the liquid outlet depends on the spring component and the ejector pin, and the ejector pin closes the liquid outlet channel. This structure is more complicated and only has water spray or spray, but cannot spray foam. Another example is the application number 202310191782.0, which discloses a foam nozzle, including a nozzle body, the nozzle body is detachably connected to a grid foaming head, the grid foaming head includes an inner cylinder with a smooth inner wall, the smooth inner wall surrounds a mixing chamber coaxial with the injection port, and the end face of the grid foaming head is provided with a mesh screen, which is more stable when sprayed by the nozzle body, and can produce rich, dense, and stable foam after mixing with air through the grid foaming head. Its structure is also relatively simple, but its nozzle cannot be directly installed on the existing push-type spray gun, and it cannot be disassembled to achieve the functions of spraying and foaming at the same time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a foam nozzle with a simple structure. The detachable foam plug connector can be directly installed on an existing push-type spray gun to achieve both spraying and foaming functions. At the same time, a foam spray gun including the above-mentioned foam nozzle is disclosed.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The foam nozzle comprises a nozzle seat threadedly connected to a spray gun body, an inner tube is arranged in the nozzle seat, the inner tube is provided with a liquid outlet connected to a liquid outlet channel in the spray gun body, a nozzle port connected to the inner tube is arranged on the nozzle seat, and a foam plug connector is detachably connected to the nozzle seat so as to realize the spraying and foam spraying functions by disassembling and assembling the foam plug connector.

[0007] Preferably, the inner tube includes a first channel and a second channel close to the nozzle opening, the first channel is an equal-diameter channel, the inner diameter of the second channel gradually expands in the direction away from the first channel, and the inner diameter of the liquid outlet is 0.5-2mm, so that the output liquid can be quickly ejected and collide with the inner wall of the nozzle seat, and then ejected from the small-aperture nozzle opening to achieve spraying.

[0008] Preferably, the foam plug connector includes an outer tube sleeved on the outside of the nozzle seat, an outer extension tube coaxial with the nozzle seat and an inner extension tube connected to the outer extension tube, the inner extension tube extends to the nozzle mouth, and the inner extension tube is provided with a slot, and the inner wall of the outer tube is provided with a groove connected to the outside world. The airflow enters the inner extension tube through the slot from the groove and mixes with the spray sprayed from the nozzle mouth to form foam bubbles to realize foam spraying.

[0009] Preferably, the outer extension tube is provided with a reduced diameter port, the inner diameter of which is smaller than the inner diameter of the inner tube, so as to ensure that the airflow and the spray are fully mixed.

[0010] Preferably, the outer circumference of the outer tube is provided with anti-slip teeth to facilitate the disassembly and assembly of the foam plug connector.

[0011] Preferably, a reinforcing rib is provided between the outer tube and the outer extension tube to strengthen the outer extension tube.

[0012] Preferably, a grid foaming piece is detachably inserted into the outer extension tube and / or the inner extension tube, and a mesh screen is provided at the end of the grid foaming piece to impact the airflow and spray to form foam.

[0013] A foam spray gun comprises the above-mentioned foam nozzle.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The foam nozzle of the utility model has a simple structure, and its detachable foam plug connector can be directly installed on the existing push-type spray gun to realize the functions of spraying and foaming at the same time; at the same time, the foam plug connector cooperates with the grid foaming part to produce rich and dense foam after the spray and air flow are mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of this foam spray gun.

[0017] Figure 2 This is a partial cross-sectional view of the foam spray gun.

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the foam spray gun.

[0019] Figure 4 This is a schematic diagram of the disassembled structure of the foam nozzle.

[0020] Figure 5 It is a schematic diagram of the structure of the foam plug connector in the foam nozzle.

[0021] Figure 6 It is a side view of the foam plug connector in this foam nozzle.

[0022] Figure 7 It is a cross-sectional view of the foam connector and the grid foaming part in the foam nozzle.

[0023] Figure 8 This is a split cross-sectional view of the foam connector and the grid foaming part in this foam nozzle.

[0024] In the accompanying drawings: 1-spray gun body, 2-nozzle seat, 21-nozzle port, 3-inner tube, 31-liquid outlet, 4-foam plug connector, 41-outer tube, 411-groove, 412-anti-slip teeth, 413-reinforcement ribs, 42-outer extension tube, 421-reducing port, 43-inner extension tube, 431-slot, 5-grid foam part, 51-mesh screen. DETAILED DESCRIPTION

[0025] Embodiment 1: A preferred embodiment of the utility model provides a foam nozzle, including a nozzle seat 2 threadedly connected to a spray gun body 1, an inner tube 3 is provided in the nozzle seat 2, the inner tube 3 is provided with a liquid outlet 31 connected to a liquid outlet channel in the spray gun body 1, a nozzle port 21 connected to the inner tube 3 is provided on the nozzle seat 2, and a foam plug connector 4 is detachably connected to the nozzle seat 2, so that the foam plug connector 4 can be disassembled and assembled to realize the spraying and foam spraying functions.

[0026] The inner tube 3 includes a first channel and a second channel close to the nozzle opening 21. The first channel is a channel of equal diameter. The inner diameter of the second channel gradually expands away from the first channel. The inner diameter of the liquid outlet 31 is 0.5-2mm, so that the output liquid can be sprayed out quickly and collide with the inner wall of the nozzle seat 2, and then sprayed out from the small-aperture nozzle opening 21 to achieve spraying.

[0027] The foam nozzle has a simple structure, and its detachable foam plug connector can be directly installed on an existing push-type spray gun to achieve both spraying and foaming functions.

[0028] Embodiment 2: A preferred embodiment of the utility model provides a foam nozzle, which differs from the above-mentioned embodiments only in that: the foam plug connector 4 includes an outer tube 41 sleeved on the outside of the nozzle seat 2, an outer extension tube 42 coaxial with the nozzle seat 2 and an inner extension tube 43 connected to the outer extension tube 42, the inner extension tube 43 extends to the nozzle opening 21, and the inner extension tube 43 is provided with a groove 431, and the inner wall of the outer tube 41 is provided with a groove 411 connected to the outside, the airflow enters the inner extension tube 43 from the groove 411 through the groove 431 and mixes with the spray sprayed from the nozzle opening 21 to form foam bubbles to realize foam spraying.

[0029] The outer extension tube 42 is provided with a reducing port 421, whose inner diameter is smaller than the inner diameter of the inner tube 3 to ensure that the airflow and the spray are fully mixed; the outer tube 41 is provided with anti-slip teeth 412 on the outer periphery to facilitate the disassembly and assembly of the foam plug connector 4; a reinforcing rib 413 is provided between the outer tube 41 and the outer extension tube 42 to strengthen the outer extension tube 42.

[0030] Embodiment 3: A preferred embodiment of the utility model provides a foam nozzle, which differs from the above embodiments only in that: a grid foaming part 5 is detachably inserted into the outer extension tube 42 and / or the inner extension tube 43, and a mesh screen 51 is provided at the end of the grid foaming part 5 to impact the air flow and spray to form foam; the foam plug connector 4 cooperates with the grid foaming part 5 to produce rich and dense foam after the spray and air flow are mixed.

[0031] Embodiment 4: A preferred embodiment of the utility model provides a foam spray gun, which includes the above-mentioned foam nozzle.

Claims

1. Foam nozzle, characterized in that, The invention comprises a nozzle seat (2) threadedly connected to a spray gun body (1), an inner tube (3) being arranged in the nozzle seat (2), the inner tube (3) being provided with a liquid outlet (31) communicating with a liquid outlet channel in the spray gun body (1), a nozzle port (21) communicating with the inner tube (3) being arranged on the nozzle seat (2), and a foam plug connector (4) being detachably connected to the nozzle seat (2), so that the foam plug connector (4) can be disassembled and assembled to realize the spraying and foam spraying functions; The inner tube (3) comprises a first channel and a second channel close to the nozzle opening (21), the first channel being a channel of equal diameter, the inner diameter of the second channel gradually expanding in a direction away from the first channel, the inner diameter of the liquid outlet (31) being 0.5-2 mm, so that the output liquid can be sprayed out quickly and collide with the inner wall of the nozzle seat (2), and then sprayed out from the nozzle opening (21) with a small aperture to achieve spraying; The foam plug connector (4) comprises an outer tube (41) sleeved on the outside of the nozzle seat (2), an outer extension tube (42) coaxial with the nozzle seat (2), and an inner extension tube (43) connected to the outer extension tube (42); the inner extension tube (43) extends to the nozzle opening (21), and a groove (431) is provided on the inner extension tube (43); a groove (411) connected to the outside is provided on the inner wall of the outer tube (41); an airflow enters the inner extension tube (43) from the groove (411) through the groove (431) and mixes with the spray sprayed from the nozzle opening (21) to form foam bubbles and realize foam spraying.

2. The foam nozzle according to claim 1, characterized in that The outer extension tube (42) is provided with a reduced diameter opening (421), the inner diameter of which is smaller than the inner diameter of the inner tube (3) to ensure that the airflow and the spray are fully mixed.

3. The foam nozzle according to claim 1, characterized in that The outer circumference of the outer tube (41) is provided with anti-slip teeth (412) to facilitate the disassembly and assembly of the foam plug connector (4).

4. The foam nozzle according to claim 1, characterized in that A reinforcing rib (413) is provided between the outer tube (41) and the outer extension tube (42) to reinforce the outer extension tube (42).

5. The foam nozzle according to claim 1, characterized in that A grid foaming piece (5) is detachably inserted into the outer extension tube (42) and / or the inner extension tube (43), and a mesh screen (51) is provided at the end of the grid foaming piece (5) to impact the airflow and spray to form foam.

6. Foam spray gun, characterized in that, The foam nozzle comprises the foam nozzle according to any one of claims 1 to 5.

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