Press type spray gun head

Abstract

The utility model relates to the technical field of spraying equipment, and discloses a push type spraying gun head, which comprises a mounting seat (1), and a nozzle (2), a trigger (3), an inner pipe body (4) and an outer shell (5) which are arranged on the mounting seat (1), the inner pipe body (4) is provided with an air return pipe (41) and a liquid outlet pipe (42) which are communicated with a piston pipe (11), and the liquid outlet pipe (42) is communicated with a piston cavity (14) through a first sealing ball (43) so as to realize one-way liquid outlet; an air blowing mechanism (6) with one-way air inlet is arranged in the air return pipe (41), so that when the piston rod (12) reciprocates, negative pressure is formed in the piston cavity (14), and meanwhile, the piston head (121) repeatedly presses the air blowing mechanism (6); according to the spray gun head, the air blowing mechanism is additionally arranged in an existing air return pipe, negative pressure is formed in the piston cavity along with reciprocating motion of the piston rod, air blowing and pressurization are conducted in a bottle, and the spray effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spray equipment, in particular to a press-type spray gun head. Background Art

[0002] Liquid spray gun is a simple and effective liquid atomization device, which is widely used in the fields of household chemical cleaners, car protection, gardening products, animal care products, furniture polishing products, etc. Existing spray guns can be divided into spray-type spray guns and foam-type spray guns according to different nozzles, such as the Chinese patent with application number CN202310191782.0, which includes a nozzle body, and the nozzle body is detachably connected with a grid foaming head, which can produce rich, dense and stable foam after mixing with air through the grid foaming head. Another example is the Chinese patent with application number CN202010362820.0 of the applicant, which discloses an external spring-type spray gun head with a double one-way valve structure, one end of the spring member is installed on the mounting seat and the cover body, and the other end of the spring member is installed on the trigger to collect elastic potential energy to make the trigger and the piston automatically return to their positions. It has the advantages of compact structure, few parts, and easy installation. However, these two structures have air reflux when the piston rod reciprocates, and the pressure difference between the piston cavity and the liquid storage bottle is small, which affects the atomization and foaming effects. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a push-type spray gun head, which adds an air blowing mechanism in the existing air return pipe. With the reciprocating motion of the piston rod, negative pressure is formed in the piston chamber, and air is blown into the bottle to increase pressure, thereby improving the spray effect; and the air blowing mechanism forms a closed space in the bottle to prevent air backflow, which is suitable for continuous spraying or intermittent spraying.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A push-type spray gun head comprises a mounting seat, a nozzle, a trigger, an inner tube body and an outer tube body mounted on the mounting seat, wherein the mounting seat comprises a piston tube with an opening on one side, a piston rod is inserted into the opening of the piston tube, the piston rod extends to one end of the piston tube and abuts against the trigger, so that the piston rod performs reciprocating motion in the piston tube under the drive of the trigger; the other end of the piston rod abuts against the inner wall of the piston tube through a first spring, and the piston rod is driven to reset under the action of the first spring;

[0006] A liquid outlet channel connected to the piston tube is provided in the mounting seat, a piston head for sealing the piston tube is provided at the end of the piston rod, the piston head is a structure with two sides concave toward the middle, the closed space formed by the piston head and the piston tube is the piston cavity, and the liquid outlet channel is connected to the piston cavity;

[0007] An air return pipe and a liquid outlet pipe connected to the piston tube are provided on the inner tube body. The liquid outlet pipe is connected to the piston cavity through a first sealing ball to realize one-way liquid outlet. A one-way air intake inflation mechanism is provided in the air return pipe to form a negative pressure in the piston cavity when the piston rod reciprocates. At the same time, the piston head repeatedly presses the inflation mechanism and inflates air into the liquid storage bottle connected to the spray gun head to continuously pressurize the liquid storage bottle to realize liquid spray or spray.

[0008] Preferably, the inflation mechanism includes a second sealing ball arranged at the end of the return air pipe, a sealing rod abutting against the second sealing ball, a second spring sleeved on the sealing rod and driving the second sealing ball to reset, and a one-way valve arranged on the wall of the return air pipe. A sealing platform is provided on the inner wall of the return air pipe, and a sealing head is provided at the end of the sealing rod. When the sealing head abuts against the sealing platform, a sealed cavity is formed, so that the pressure in the sealed cavity is greater than the pressure in the liquid storage bottle, the one-way valve is opened, and the liquid storage bottle is continuously pressurized.

[0009] Preferably, an annular platform for supporting the second spring is provided on the inner wall of the return air pipe, and the sealing rod passes through the annular platform.

[0010] Preferably, the mounting seat is also provided with a threaded seat threadedly connected to the nozzle, the nozzle includes a nozzle seat connected to the liquid outlet channel, an inner tube is provided in the nozzle seat, the inner tube is provided with a liquid outlet connected to the liquid outlet channel, the nozzle seat is provided with a nozzle port connected to the inner tube, and the nozzle seat is detachably connected to a foam plug connector to realize the spraying and foam spraying functions by disassembling and assembling the foam plug connector.

[0011] 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 groove, and the inner wall of the outer tube is provided with a groove connected to the outside world; the air flow enters the inner extension tube through the groove and the slot and mixes with the spray sprayed from the nozzle mouth to form foam bubbles to realize the foam spraying.

[0012] Preferably, a grid foaming piece is detachably inserted into the outer extension tube and / or the inner 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] Preferably, a first slot for connecting to the outer shell is provided on the top of the mounting seat, second slots for connecting to the outer shell are provided on both sides of the bottom of the mounting seat, and a first socket matching with the first slot and a second socket matching with the second slot are provided on the outer shell to achieve the outer shell being wrapped around the mounting seat.

[0014] Preferably, the mounting seat is further provided with a third slot connected to the trigger, and the trigger is provided with a rotating shaft inserted into the third slot to press the trigger.

[0015] Preferably, the outer sleeve of the inner tube body is provided with a threaded cover, and the threaded cover is provided with an internal thread for threaded connection with the liquid storage bottle.

[0016] Preferably, a straw extending into the liquid storage bottle is inserted into the liquid outlet pipe, and the straw is sleeved on the filter element.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The spray gun head of the utility model adds an air blowing mechanism in the existing air return pipe, and forms a negative pressure in the piston cavity with the reciprocating motion of the piston rod, and at the same time blows air into the bottle to increase the pressure, thereby improving the spray effect; and the air blowing mechanism forms a closed space in the bottle to prevent air backflow, which is suitable for continuous spraying or intermittent spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the push-type spray gun head.

[0020] Figure 2 This is a schematic diagram of the disassembled structure of the push-type spray gun head.

[0021] Figure 3 This is a cross-sectional view of the push-type spray gun head.

[0022] Figure 4 for Figure 3 A partial enlarged view of .

[0023] Figure 5 This is a schematic diagram of the structure of the mounting seat in the push-type spray gun head.

[0024] Figure 6 This is a schematic diagram of the structure of the outer shell in the push-type spray gun head.

[0025] Figure 7 This is a schematic diagram of the structure of the foam connector in the push-type spray gun head.

[0026] Figure 8 A side view of the foam connector in the push-type spray gun head.

[0027] Fig. 9 This is a cross-sectional view of the foam connector and the grid foaming part in the push-type spray gun head.

[0028] Fig.10 This is a split cross-sectional view of the foam connector and the grid foam part in the push-type spray gun head.

[0029] In the accompanying drawings: 1-mounting seat, 11-piston tube, 12-piston rod, 121-piston head, 13-first spring, 14-piston chamber, 15-threaded seat, 101-liquid outlet channel, 102-first slot, 103-second slot, 104-third slot, 2-nozzle, 21-nozzle seat, 211-nozzle port, 22-inner tube, 221-liquid outlet, 23-foam plug connector, 231-outer tube, 2311-groove, 232-outer extension tube, 233-inner extension tube, 23 31- slot, 24- grid foam part, 241- mesh screen, 3- trigger, 31- rotating shaft, 4- inner tube body, 41- air return pipe, 42- liquid outlet pipe, 43- first sealing ball, 5- outer shell, 51- first socket, 52- second socket, 6- inflation mechanism, 61- second sealing ball, 62- sealing rod, 63- second spring, 64- one-way valve, 65- sealing platform, 66- sealing head, 67- annular platform, 601- sealing chamber, 7- threaded cover, 8- straw, 9- filter element. DETAILED DESCRIPTION

[0030] Embodiment 1: A preferred embodiment of the utility model provides a press-type spray gun head, including a mounting base 1, and a nozzle 2, a trigger 3, an inner tube body 4 and an outer tube body 5 mounted on the mounting base 1. The mounting base 1 includes a piston tube 11 with an opening on one side, and a piston rod 12 is inserted into the opening of the piston tube 11. The piston rod 12 extends to one end of the piston tube 11 and abuts against the trigger 3, so that the piston rod 12 reciprocates in the piston tube 11 under the drive of the trigger 3; the other end of the piston rod 12 abuts against the inner wall of the piston tube 11 through a first spring 13, and drives the piston rod 12 to reset under the action of the first spring 13;

[0031] The mounting seat 1 is provided with a liquid outlet channel 101 in communication with the piston tube 11, and the end of the piston rod 12 is provided with a piston head 121 for sealing the piston tube 11. The piston head 121 is a structure with two sides concave toward the middle. The closed space formed by the piston head 121 and the piston tube 11 is a piston cavity 14, and the liquid outlet channel 101 is in communication with the piston cavity 14;

[0032] The inner tube body 4 is provided with a return air pipe 41 and a liquid outlet pipe 42 connected to the piston tube 11. The liquid outlet pipe 42 is connected to the piston chamber 14 through a first sealing ball 43 to achieve one-way liquid discharge; the return air pipe 41 is provided with a one-way air intake inflation mechanism 6 to form a negative pressure in the piston chamber 14 when the piston rod 12 reciprocates. At the same time, the piston head 121 repeatedly presses the inflation mechanism 6 and inflates air into the liquid storage bottle connected to the spray gun head, so as to continuously pressurize the liquid storage bottle to achieve liquid spray or spray.

[0033] The top of the mounting base 1 is provided with a first slot 102 for connecting to the outer shell 5, and the two sides of the bottom of the mounting base 1 are provided with second slots 103 for connecting to the outer shell 5. The outer shell 5 is provided with a first socket 51 that cooperates with the first slot 102 and a second socket 52 that cooperates with the second slot 103, so as to achieve the outer shell 5 being covered on the mounting base 1.

[0034] The mounting base 1 is also provided with a third slot 104 connected to the trigger 3 , and the trigger 3 is provided with a rotating shaft 31 inserted into the third slot 104 to press the trigger 3 .

[0035] The inner tube body 4 is provided with a threaded cover 7 on the outside, and the threaded cover 7 is provided with an internal thread for threaded connection with the liquid storage bottle.

[0036] The liquid outlet pipe 42 is inserted with a straw 8 extending into the liquid storage bottle, and the straw 8 is sleeved with a filter 9 .

[0037] The spray gun head adds an air blowing mechanism 6 in the existing air return pipe 41. With the reciprocating motion of the piston rod 12, negative pressure is formed in the piston chamber 14, and air is blown into the bottle to increase pressure, thereby improving the spray effect. The air blowing mechanism 6 forms a closed space in the bottle to prevent air backflow, which is suitable for continuous spraying or intermittent spraying.

[0038] Embodiment 2: A preferred embodiment of the utility model provides a push-type spray gun head, which differs from the above-mentioned embodiment only in that: the inflation mechanism 6 includes a second sealing ball 61 arranged at the end of the return air pipe 41, a sealing rod 62 abutting against the second sealing ball 61, a second spring 63 sleeved on the sealing rod 62 and driving the second sealing ball 61 to return to its original position, and a one-way valve 64 arranged on the wall of the return air pipe 41, a sealing platform 65 is provided on the inner wall of the return air pipe 41, and a sealing head 66 is provided at the end of the sealing rod 62. When the sealing head 66 abuts against the sealing platform 65, a sealing cavity 601 is formed, so that the pressure in the sealing cavity 601 is greater than the pressure in the liquid storage bottle, and the one-way valve 64 is opened, thereby continuously pressurizing the liquid storage bottle.

[0039] An annular platform 67 for resisting the second spring 63 is disposed on the inner wall of the air return pipe 41 , and the sealing rod 62 passes through the annular platform 67 .

[0040] Embodiment 3: A preferred embodiment of the utility model provides a push-type spray gun head, which differs from the above embodiments only in that: the mounting seat 1 is also provided with a threaded seat 15 threadedly connected to the nozzle 2, the nozzle 2 includes a nozzle seat 21 connected to the liquid outlet channel 101, an inner tube 22 is provided in the nozzle seat 21, the inner tube 22 is provided with a liquid outlet 221 connected to the liquid outlet channel 101, the nozzle seat 21 is provided with a nozzle port 211 connected to the inner tube 22, and a foam plug connector 23 is detachably connected to the nozzle seat 21, so that the foam plug connector 23 can be disassembled and assembled to realize the spraying and foam spraying functions.

[0041] The foam plug connector 23 includes an outer tube 231 sleeved on the outside of the nozzle seat 21, an outer extension tube 232 coaxial with the nozzle seat 21 and an inner extension tube 233 connected to the outer extension tube 232, the inner extension tube 233 extends to the nozzle opening 211, and is provided with a groove 2331, and the inner wall of the outer tube 231 is provided with a groove 2311 connected to the outside; the airflow enters the inner extension tube 233 from the groove 2311 through the groove 2331 and mixes with the spray sprayed from the nozzle opening 211 to form foam bubbles to realize foam spraying.

[0042] The outer extension tube 232 and / or the inner tube 22 is detachably plugged with a grid foaming member 24 , and a mesh screen 241 is provided at the end of the grid foaming member 24 to impact the airflow and the spray to form foam.

Claims

1. A push-type spray gun head, comprising a mounting base (1), a nozzle (2) mounted on the mounting base (1), a trigger (3), an inner tube (4) and an outer tube (5), characterized in that: The mounting seat (1) comprises a piston tube (11) with an opening on one side, a piston rod (12) is inserted into the opening of the piston tube (11), and the piston rod (12) extends to one end of the piston tube (11) to abut against the trigger (3), so that the piston rod (12) performs reciprocating motion in the piston tube (11) under the drive of the trigger (3); The other end thereof abuts against the inner wall of the piston tube (11) through a first spring (13), and drives the piston rod (12) to reset under the action of the first spring (13); A liquid outlet channel (101) in communication with the piston tube (11) is provided in the mounting seat (1), a piston head (121) for sealing the piston tube (11) is provided at the end of the piston rod (12), the piston head (121) is a structure with two sides concave toward the middle, the closed space formed by the piston head (121) and the piston tube (11) is a piston chamber (14), and the liquid outlet channel (101) is in communication with the piston chamber (14); The inner tube body (4) is provided with an air return pipe (41) and a liquid outlet pipe (42) which are connected to the piston tube (11); the liquid outlet pipe (42) is connected to the piston chamber (14) via a first sealing ball (43) to achieve one-way liquid outlet; a one-way air intake blowing mechanism (6) is provided in the air return pipe (41) so that when the piston rod (12) reciprocates, negative pressure is formed in the piston chamber (14); at the same time, the piston head (121) repeatedly presses the blowing mechanism (6) and blows air into a liquid storage bottle connected to the spray gun head, so that the liquid storage bottle is continuously pressurized to achieve liquid spray or spray.

2. The push-type spray gun head according to claim 1, characterized in that: The inflation mechanism (6) comprises a second sealing ball (61) arranged at the end of the return air pipe (41), a sealing rod (62) abutting against the second sealing ball (61), a second spring (63) sleeved on the sealing rod (62) and driving the second sealing ball (61) to return to its original position, and a one-way valve (64) arranged on the wall of the return air pipe (41). A sealing platform (65) is provided on the inner wall of the return air pipe (41), and a sealing head (66) is provided at the end of the sealing rod (62). When the sealing head (66) abuts against the sealing platform (65), a sealing cavity (601) is formed, so that the pressure in the sealing cavity (601) is greater than the pressure in the liquid storage bottle, and the one-way valve (64) is opened, thereby continuously pressurizing the liquid storage bottle.

3. The push-type spray gun head according to claim 2, characterized in that: An annular platform (67) for resisting the second spring (63) is provided on the inner wall of the air return pipe (41), and the sealing rod (62) passes through the annular platform (67).

4. The push-type spray gun head according to claim 1, characterized in that: The mounting seat (1) is further provided with a threaded seat (15) threadably connected to the nozzle (2); the nozzle (2) comprises a nozzle seat (21) connected to the liquid outlet channel (101); an inner tube (22) is provided in the nozzle seat (21); the inner tube (22) is provided with a liquid outlet (221) connected to the liquid outlet channel (101); a nozzle port (211) connected to the inner tube (22) is provided on the nozzle seat (21); a foam plug connector (23) is detachably connected to the nozzle seat (21) so as to realize the spraying and foam spraying functions by disassembling and assembling the foam plug connector (23).

5. The push-type spray gun head according to claim 4, characterized in that: The foam plug connector (23) comprises an outer tube (231) sleeved on the outside of the nozzle seat (21), an outer extension tube (232) coaxial with the nozzle seat (21), and an inner extension tube (233) connected to the outer extension tube (232); the inner extension tube (233) extends to the nozzle opening (211), and a groove (2331) is provided on the inner extension tube (233); a groove (2311) connected to the outside is provided on the inner wall of the outer tube (231); airflow enters the inner extension tube (233) from the groove (2311) through the groove (2331) and mixes with the spray sprayed from the nozzle opening (211) to form foam bubbles and realize foam spraying.

6. The push-type spray gun head according to claim 5, characterized in that: A grid foaming piece (24) is detachably inserted into the outer extension tube (232) and / or the inner tube (22), and a mesh screen (241) is provided at the end of the grid foaming piece (24) to impact the airflow and spray to form foam.

7. The push-type spray gun head according to claim 1, characterized in that: The top of the mounting seat (1) is provided with a first slot (102) for connecting with the outer shell (5), and the bottom of the mounting seat (1) is provided with second slots (103) for connecting with the outer shell (5) on both sides, and the outer shell (5) is provided with a first socket (51) matching with the first slot (102) and a second socket (52) matching with the second slot (103), so as to achieve the outer shell (5) being covered on the mounting seat (1).

8. The push-type spray gun head according to claim 1, characterized in that: The mounting seat (1) is also provided with a third slot (104) connected to the trigger (3), and the trigger (3) is provided with a rotating shaft (31) inserted into the third slot (104) for pressing the trigger (3).

9. The push-type spray gun head according to claim 1, characterized in that: The inner tube body (4) is provided with a threaded cover (7) on its outer sleeve, and the threaded cover (7) is provided with an internal thread for threaded connection with a liquid storage bottle.

10. The push-type spray gun head according to claim 2, characterized in that: A suction tube (8) extending into the liquid storage bottle is inserted into the liquid outlet pipe (42), and the suction tube (8) is sleeved on the filter element (9).

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