CN218672161U - Spray gun - Google Patents

Abstract

The utility model belongs to the technical field of the burning, specifically disclose spray gun. The spray gun includes: the valve body is internally provided with an air inlet channel, a first valve cavity, a second valve cavity and an air outlet channel, and an air inlet of the air outlet channel and the first valve cavity can be communicated with the second valve cavity; one end of the switch valve component is installed in the first valve cavity, the other end of the switch valve component is exposed out of the valve body to form a pressing end, and selective communication between the first valve cavity and the air inlet channel is achieved by pressing the pressing end of the switch valve component; the regulating valve assembly is at least partially arranged in the second valve cavity and is used for regulating the gas flow flowing from the first valve cavity to the gas outlet passage; and the ignition assembly is used for igniting the gas sprayed from the injection port. The utility model provides a spray gun can improve the convenience of use, security and the reliability of spray gun.

Description

Spray gun

Technical Field

The utility model relates to a combustion technology field especially relates to the spray gun.

Background

The spray gun is a device for realizing fuel ignition combustion, and is widely applied to various places such as outdoor picnic, food material treatment and the like due to the characteristics of small volume, convenience in carrying and use and the like.

The spray gun generally comprises a holding handle and a spray gun head, wherein an air box is arranged in the holding handle, a spray tube, an air inlet channel, a knob control valve and the like are arranged in the spray gun head, the knob control valve is used for controlling selective communication between the air inlet channel and the spray tube so as to realize gas supply control, and meanwhile, the knob control valve can also be used for adjusting the gas flow flowing from the air inlet channel to the spray tube so as to adjust the flame size.

The spray gun provided by the prior art adopts a knob control valve to simultaneously control the on-off of gas and the adjustment of gas flow, so that the knob control valve needs to be rotated to a closed state when the spray gun is suspended, and after the spray gun is used, the firepower needs to be adjusted again, the operation is complex, and the firepower after being adjusted again is difficult to be well adjusted to be consistent with the firepower in the prior use, thereby influencing the use experience of the spray gun; simultaneously, through setting up a knob control valve simultaneous control break-make and flow control, lead to the maloperation of knob control valve easily to there is the risk that the gas leaked, influence the safety in utilization of spray gun.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spray gun, it can effectively solve the inconvenient and not high problem of safety in utilization of current spray gun pause use, improves the convenience in utilization, security and the use reliability of spray gun.

The technical problem is solved by the following technical scheme:

spray gun, its characterized in that includes:

the valve body is internally provided with an air inlet channel, a first valve cavity, a second valve cavity and an air outlet channel, the tail end of the air outlet channel forms a jet orifice, the air inlet channel is used for introducing fuel gas, and an air inlet of the air outlet channel and the first valve cavity can be communicated with the second valve cavity;

the switch valve assembly is arranged in the first valve cavity at one end, the other end of the switch valve assembly is exposed out of the valve body to form a pressing end, and selective communication between the first valve cavity and the air inlet channel is achieved by pressing the pressing end of the switch valve assembly;

a regulator valve assembly disposed at least partially within the second valve chamber, the regulator valve assembly being configured to regulate a flow of gas from the first valve chamber to the outlet gas passageway;

and the ignition assembly is used for igniting the gas sprayed from the injection port.

Spray gun, compare with the background art, the beneficial effect who has is: the utility model provides a spray gun, through setting up switch valve subassembly and regulating valve subassembly, make switch valve subassembly can control the break-make of gas, the regulating valve subassembly can be used to control the flow of gas, thereby when the spray gun is suspended to use, need not to regulate and control the regulating valve subassembly, only need press or release switch valve subassembly, can realize the suspension supply and supply once more of gas, improve convenience, reliability and the security of gas break-make control; meanwhile, the on-off of the fuel gas and the regulation of the fuel gas flow are respectively controlled, and the structures of the switch valve assembly and the regulating valve assembly are also facilitated to be simplified, so that the reliability of the single switch valve assembly and the single regulating valve assembly is further improved, the probability of misoperation can be effectively reduced, the probability of fuel gas leakage is reduced, and the use safety of the spray gun is improved; moreover, through setting up ignition assembly, realize that gas break-make, flow control and gas ignition are all separated, further improve the safety in utilization of spray gun.

In one embodiment, the spray gun further comprises:

the shell is wrapped on the outer side of the valve body, and the pressing end, the operation end of the regulating valve assembly and the ignition button are exposed out of the shell;

and the trigger is movably connected to the outer side of the shell and can be abutted with the pressing end to actuate the switch valve component.

In one embodiment, the switch valve assembly has an opening state for communicating the first valve cavity and the air inlet passage and a closing state for blocking the communication of the first valve cavity and the air inlet passage;

the spray gun further comprises a locking piece, wherein the locking piece has a locking state and an unlocking state, when the locking piece is in the unlocking state, the trigger can be linked with the switch valve assembly to enable the pressing end to be pressed or released, and when the locking piece is in the locking state, the locking piece limits the trigger to move so that the switch valve assembly is kept in the opening state or the closing state.

In one embodiment, the locked state includes:

a first locking state in which the switch valve assembly is in the closed state and the lock member abuts against a side of the trigger toward the pressing end to restrict the trigger from pressing the pressing end when the lock member is in the first locking state;

and/or a second locking state, when the locking piece is in the second locking state, the switch valve assembly is in the opening state, and the locking piece is abutted against one side of the trigger, which is deviated from the pressing end, so as to limit the release of the pressing end.

In one embodiment, the locking piece penetrates through the shell, and the locking piece can slide relative to the shell to enable the locking piece to be switched between the locking state and the unlocking state;

and/or at least one end of the locking piece is exposed out of the shell.

In one embodiment, the locking piece is provided with at least two clamping grooves at intervals, and the shell is provided with clamping protrusions;

when the locking piece is in the locking state, the clamping convex is clamped in one clamping groove;

when the locking piece is in the unlocking state, the clamping convex card is arranged in the other clamping groove.

In one embodiment, the trigger comprises a trigger shell and a pushing convex column which is convexly arranged on the inner side of the upper end of the trigger shell, the trigger shell is positioned on the outer side of the shell, the lower end of the trigger shell is rotatably connected with the shell, the free end of the pushing convex column extends into the shell, and the pushing convex column is abutted with the pressing end;

when the locking piece is in the first locking state, the locking piece is abutted against one side, facing the pressing end, of the abutting and pushing convex column, and when the locking piece is in the second locking state, the locking piece is abutted against one side, facing away from the pressing end, of the abutting and pushing convex column.

In one embodiment, the locking member is provided with an avoidance port, the avoidance port is arranged in a penetrating manner along the pressing direction of the pressing end, and when the locking member is in the unlocking state, the free end of the pushing convex column penetrates through the avoidance port;

and/or a first limiting groove with an opening facing the pushing convex column is formed in the locking piece, and when the locking piece is in the locking state, one side, facing the pressing end, of the pushing convex column is attached to the groove wall of the first limiting groove;

and/or, a second limiting groove is formed in one side, facing the pressing end, of the locking piece, and when the locking piece is in the second locking state, one side, deviating from the pressing end, of the abutting-pushing convex column is abutted to the groove wall of the second limiting groove.

In one embodiment, the switch valve assembly has an opening state for communicating the first valve cavity and the air inlet passage and a closing state for blocking the communication of the first valve cavity and the air inlet passage;

the switch valve assembly is provided with an elastic resetting piece, and the elastic resetting piece is used for keeping or resetting the switch valve assembly to the closed state.

In one embodiment, the regulating valve assembly comprises a regulating knob and a regulating valve core, wherein a first end of the regulating valve core is slidably inserted into the second valve cavity, a second end of the regulating valve core is connected with the regulating knob, and the regulating knob is rotatably arranged on the shell so that the regulating valve core can slide in the second valve cavity;

ignition assembly includes ignition button and sets up in the some firearm in the valve body outside, ignition button slip cover is established adjust knob's inboard, just ignition button's slip direction with adjust knob's axis of rotation direction is the same, ignition assembly is configured as through pressing ignition button triggers some firearm ignition.

Drawings

Fig. 1 is a schematic structural diagram of a spray gun according to an embodiment of the present invention;

fig. 2 is a schematic view of a split structure of a spray gun provided by the embodiment of the invention;

fig. 3 is a cross-sectional view of a valve body and a regulating assembly provided in an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

FIG. 5 is a cross-sectional view of the spray gun of the present invention with the lock member in a first locked position;

FIG. 6 is an enlarged view of a portion of FIG. 5 at J;

fig. 7 is a schematic structural diagram of a pressure ring provided in an embodiment of the present invention;

FIG. 8 is a sectional view of a portion of the structure of a spray gun according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a locking member according to an embodiment of the present invention;

fig. 10 is a schematic view of a spray gun according to an embodiment of the present invention with the locking member in the second locked position.

Description of reference numerals:

1. a valve body; 11. a holding rod part; 111. an air intake passage; 12. a valve seat portion; 121. a first seat; 122. a second seat; 123. a connecting seat part; 124. a first valve chamber; 1241. a push-against cavity; 1242. a valve core cavity; 125. a second valve cavity; 1251. a sliding chamber section; 1252. screwing the cavity part; 126. the air inlet is communicated with the air passage; 127. the air outlet is communicated with the air passage; 13. a jet pipe portion; 131. an air outlet passage; 1311. a main gas outlet channel; 1312. a transition gas passage; 1313. a jet air passage; 14. a fin;

2. a switch valve assembly; 21. a switch valve core; 211. mounting a shell; 212. a top rod; 213. a piston; 22. a pushing member; 221. a pressing part; 222. a sliding part; 223. a pushing part; 23. an elastic reset member; 24. a second seal ring; 25. sealing the cover;

3. a regulator valve assembly; 31. adjusting the valve core; 311. plugging the head; 312. a valve stem portion; 313. a screw section; 314. a sliding rod part; 32. adjusting a knob; 321. an external rotation sleeve part; 3211. mounting a ring groove; 322. an inner shoe portion; 33. a first seal ring; 34. a stopper;

4. an ignition assembly; 41. an ignition button; 411. pressing the sleeve; 412. pressing a ring; 4121. a ring portion; 4122. limiting lugs; 4123. clamping the arm part; 42. an igniter; 43. an elastic member;

5. a housing; 5a, a half shell; 51. a main housing portion; 511. a grip housing portion; 512. an ejection shell portion; 52. a limiting rib part; 53. a support rib portion; 54. a stud portion; 55. clamping and protruding; 56. clamping the bulges; 57. a rotating shaft part; 58. a flange portion; 501. the front end is open; 502. the top is open; 503. the bottom is open; 504. a lateral opening; 505. an insertion opening; 506. a jack; 507. a trigger groove;

6. an external operating assembly; 61. a trigger; 611. a trigger case; 612. pushing the convex column; 613. a rotating plate; 62. a locking member; 621. a sliding body; 622. a limiting convex part; 6221. a first limit groove; 6222. a second limit groove; 623. avoiding the mouth; 624. a card slot; 625. a yielding groove;

7. an air inlet joint; 8. and a heat insulation ring.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiment provides a spray gun which can be used for realizing gas ignition combustion for outdoor picnics, food processing or other scenes needing high-temperature flame injection.

As shown in fig. 1 to 3, the present embodiment provides a spray gun, which includes a valve body 1, a housing 5 and a regulating assembly. Wherein, the valve body 1 is provided with an air inlet passage 111, a first valve cavity 124, a second valve cavity 125 and an air outlet passage 131, the end of the air outlet passage 131 forms an injection port, the air inlet passage 111 is used for introducing fuel gas, and both the air inlet of the air outlet passage 131 and the first valve cavity 124 can be communicated with the second valve cavity 125. The regulating and controlling assembly comprises a switch valve assembly 2, a regulating valve assembly 3 and an ignition assembly 4, wherein a first end of the switch valve assembly 2 is installed in the first valve cavity 124, a second end of the switch valve assembly is exposed out of the valve body 1 and forms a pressing end, and the switch valve assembly 2 can realize selective communication between the first valve cavity 124 and the air inlet channel 111 through the pressing end; the regulating valve assembly 3 is partially arranged in the second valve cavity 125, and the regulating valve assembly 3 is used for regulating the gas flow flowing from the first valve cavity 124 to the gas outlet passage 131; and the ignition assembly 4 is used for igniting the gas sprayed from the injection port. The shell 5 encloses the outside of the valve body 1 to insulate against heat and protect the valve body 1, and to facilitate the user to hold the operation.

According to the spray gun provided by the embodiment, the switch valve component 2 and the regulating valve component 3 are arranged, so that the switch valve component 2 can control the on-off of gas, and the regulating valve component 3 can be used for controlling the flow of the gas, so that when the spray gun is temporarily used, the regulating valve component 3 is not required to be regulated, the temporary supply and the secondary supply of the gas can be realized only by pressing or releasing the switch valve component 2, and the convenience, the reliability and the safety of the on-off control of the gas are improved; meanwhile, the on-off of the fuel gas and the regulation of the fuel gas flow are respectively controlled, so that the structures of the switch valve component 2 and the regulating valve component 3 are simplified, the reliability of the single switch valve component 2 and the single regulating valve component 3 is further improved, the probability of misoperation can be effectively reduced, the probability of fuel gas leakage is reduced, and the use safety of the spray gun is improved; moreover, through setting up ignition module 4, realize that gas break-make, flow control and gas ignition are all separated, further improve the safety in utilization of spray gun.

As shown in fig. 3 and 4, the valve body 1 includes a holding rod portion 11, a valve seat portion 12 and a jet pipe portion 13, the holding rod portion 11 extends along a first direction and is provided with an air inlet passage 111, a first end of the holding rod portion 11 is an air inlet end, and a second end is connected with the valve seat portion 12; the injection pipe part 13 extends along the second direction, and the air inlet end thereof is connected with the valve seat part 12, the air outlet end is formed with an injection port, and the air outlet passage 131 is formed in the injection pipe part 13; the valve seat portion 12 is provided with the first valve chamber 124 and the second valve chamber 125. The angle between the first direction and the second direction is greater than 70 ° and less than 120 °.

The holding rod part 11 is arranged, so that a user can hold and operate the spray gun conveniently; the spray pipe part 13 is arranged, so that fuel gas injection is facilitated, the distance between the spray opening and the holding rod part 11 is increased, and the use safety of the spray gun is improved; the included angle between the first direction and the second direction is set to be 70-120 degrees, so that an operator can control the direction of the injection port conveniently, and the convenience of holding and operating the spray gun by the operator is improved.

The air inlet end of the holding rod part 11 is detachably connected with an air inlet joint 7, and the air inlet joint 7 is used for being connected with an air source box. The holding rod part 11 is positioned inside the shell 5, and the air inlet joint 7 can be exposed out through the shell 5, so that the convenience of connection with the air source box is improved. The concrete structure of air inlet joint 7 and be connected with the air supply case can adopt prior art, this is not the utility model discloses a key, here is no longer repeated.

The valve seat 12 includes a first seat 121 and a second seat 122, the first seat 121 is opened with a first valve cavity 124, the second end of the holding rod 11 is connected with the first seat 121, one end of the second seat 122 is connected with the first seat 121, and the second seat 122 and the holding rod 11 are respectively connected with two opposite sides of the first seat 121; the second seat portion 122 is connected to the first seat portion 121 at an included angle, the injection tube portion 13 is connected to the second seat portion 122 at an included angle, the injection tube portion 13 is located on one side of the second seat portion 122 away from the grip rod portion 11, and the second seat portion 122 is provided with a second valve cavity 125.

With the above arrangement, while the first valve chamber 124 and the second valve chamber 125 are convenient to arrange, the compactness and the reasonableness of the layout in the valve seat portion 12 can be improved; meanwhile, the arrangement makes the sliding direction of the switch valve component 2 and the sliding direction of the regulating valve component 3 different from the extending direction of the holding rod part 11 and the spray pipe part 13, reduces the interference between the switch valve component 2 and the regulating valve component 3, and improves the structural compactness and the use safety of the spray gun.

It can be understood that, when the spray gun is used, a user grips the grip rod portion 11, the valve seat portion 12 is located above the grip rod portion 11, the injection pipe portion 13 extends from the rear to the front, the on-off valve assembly 2 is located on the front side of the grip rod portion 11 and the lower side of the injection pipe portion 13, and the regulator valve assembly 3 is located on the upper side of the grip rod portion 11 with its upper end exposed, so that the user's convenience in handling the on-off valve assembly 2 and the regulator valve assembly 3 can be improved.

Because the injection pipe portion 13 is closer to the combustion flame, it is more easily damaged than the valve seat portion 12 and the grip rod portion 11, and in one embodiment, the grip rod portion 11 and the valve seat portion 12 are integrally formed, and the valve seat portion 12 and the injection pipe portion 13 are detachably connected, so that the processing convenience of the valve body 1 can be improved, and the maintenance and replacement of the injection pipe portion 13 are easy. In other embodiments, the grip rod portion 11, the valve seat portion 12, and the injection tube portion 13 may be separately processed and integrally connected by welding, or the grip rod portion 11 and the valve seat portion 12 may be detachably connected.

In order to improve the convenience of connecting the injection pipe portion 13 and the valve seat portion 12, the valve seat portion 12 further includes a connecting seat portion 123 protruding outside the second seat portion 122, a connecting groove is opened on an end surface of the connecting seat portion 123, and an air inlet end of the injection pipe portion 13 is inserted into the connecting groove. Preferably, an internal thread is formed on a groove wall of the connecting groove, an external thread is formed on an outer wall of the air inlet end of the injection pipe portion 13, and the injection pipe portion 13 is screwed into the connecting groove by the matching of the internal thread and the external thread, so that the connecting reliability of the injection pipe portion 13 in the connecting groove is improved and the convenience in mounting and dismounting the injection pipe portion 13 and the valve seat portion 12 is improved.

In one embodiment, outlet gas channel 131 includes a main outlet channel 1311, a transition gas channel 1312, and an injection gas channel 1313, which are sequentially connected along the length direction of injection pipe portion 13 and have gradually decreasing inner diameters, the end of injection gas channel 1313 forms an injection port, and the inlet end of main outlet channel 1311 is connected to second valve chamber 125. Due to the arrangement, the caliber of the tail end of the gas outlet air passage 131 is smaller, so that the flow rate of gas injection is improved, and the uniformity of gas and air mixing is improved; meanwhile, the main gas outlet channel 1311, the transition gas channel 1312 and the injection gas channel 1313 with gradually reduced apertures are arranged, so that the problems of large noise and large flow resistance caused by sudden and large-amplitude aperture contraction are solved, and the smoothness of gas outflow is improved.

In order to reduce the amount of heat diffused from the injection port to the valve seat portion 12, fins 14 are provided on the outer side of the injection tube portion 13, and the fins 14 are provided in plurality at intervals in the axial direction of the injection tube portion 13 to achieve better heat dissipation. The fins 14 are preferably of an annular configuration surrounding the ejector tube portion 13 to increase the contact area of the fins 14 with the air and the ejector tube portion 13.

As shown in fig. 3-5, the regulator valve assembly 3 includes a regulator valve core 31 and a regulator knob 32, a first end of the regulator valve core 31 is slidably inserted into the second valve cavity 125, and a second end of the regulator valve core 31 is exposed to the outside of the second valve cavity 125; at least one end of the adjusting knob 32 is exposed out of the housing 5 and is rotatably connected to the housing 5, and the adjusting knob 32 is connected to the second end of the adjusting valve core 31, so that the adjusting knob 32 rotates relative to the housing 5 to drive the adjusting valve core 31 to slide in the second valve cavity 125. The sliding direction of the adjustment valve body 31 and the rotation axis of the adjustment knob 32 coincide with the extending direction of the adjustment valve body 31. That is, the regulating valve assembly 3 in this embodiment is a knob valve core structure, and the position of the regulating valve core 31 in the second valve cavity 125 is regulated by rotating the regulating knob 32, so that the on-off and flow rate of the gas are regulated, the regulation is convenient, the regulating amplitude is easy to control, the flow rate regulation can be controlled accurately, and the regulating reliability is high; meanwhile, the adjusting scales are easy to mark on the adjusting knob 32, so that a user can observe the scale conveniently.

Preferably, the peripheral wall of the adjusting knob 32 is provided with a scale mark and/or an adjusting direction mark, wherein the scale mark marks the size of the flow adjustment, and the direction mark can be an arrow mark, i.e. the direction of adjustment from a large flow to a lower flow is marked by an arrow mark or the direction of adjustment from a small flow to a large flow is marked by an arrow mark.

In one embodiment, the sliding of the regulating valve core 31 in the second valve cavity 125 can realize the on-off control of the first valve cavity 124 and the second valve cavity 125, so that not only the communication between the air inlet passage 111 and the first valve cavity 124 can be blocked, but also the communication between the first valve cavity 124 and the second valve cavity 125 can be blocked, and the use safety of the spray gun is improved. That is, when the spray gun is not used for a long time, the communication between the air inlet passage 111 and the first valve chamber 124 may be cut off, and the communication between the second valve chamber 125 and the first valve chamber 124 may be cut off, so that the use safety and reliability of the spray gun can be greatly improved.

The valve seat portion 12 is further provided with an intake communicating air passage 126, two ends of the intake communicating air passage 126 are respectively communicated with the first valve cavity 124 and the second valve cavity 125, the extending direction of the intake communicating air passage 126 is the same as the extending direction of the second valve cavity 125, and the cross-sectional area of the intake communicating air passage 126 is smaller than the cross-sectional areas of the first valve cavity 124 and the second valve cavity 125. A first end of the regulator valve spool 31 is capable of extending into the intake communication air passage 126 to block communication between the first valve chamber 124 and the second valve chamber 125. With this arrangement, the reliability of the blocking of the air flow and the convenience of the installation of the adjustment valve body 31 can be improved. In other embodiments, the first valve chamber 124 and the second valve chamber 125 can be blocked from communicating by adjusting the abutting of the first end face of the valve core 31 and the end face of the second valve chamber 125 where the air inlet is located.

The valve seat 12 is further provided with an air outlet communicating air passage 127, the air outlet air passage 131 and the second valve cavity 125 are communicated through the air outlet communicating air passage 127, and the air outlet communicating air passage 127 is connected to the air inlet end of the second valve cavity 125, so as to prevent the regulating valve core 31 from blocking the air inlet of the air outlet communicating air passage 127. In other embodiments, the regulating valve core 31 may selectively block the air outlet of the communicating air passage 127, so as to communicate or block the first valve chamber 124 with the air outlet passage 131.

In one embodiment, the regulating valve core 31 includes a blocking head 311 and a valve stem 312, which are coaxially connected, an outer diameter of the blocking head 311 is smaller than an outer diameter of the valve stem 312, a distal end of the blocking head 311 is slidably inserted into the intake air communicating air passage 126, and the valve stem 312 is slidably disposed in the second valve chamber 125.

The plugging head 311 preferably comprises a cylindrical head and a transition head, the cylindrical head is cylindrical, the outer diameter of the cylindrical head is smaller than that of the valve rod part 312, the outer diameter of the transition head is gradually increased from the cylindrical head to the valve rod part 312 so as to realize smooth transition from the cylindrical head to the valve rod part 312, and even if the cylindrical head is inserted into the air inlet communicating air passage 126, a cavity still exists between the valve rod part 312 and the cavity bottom of the second valve cavity 125, and the cavity is communicated with the air outlet communicating air passage 127, so that the communication reliability of the air outlet communicating air passage 127 and the second valve cavity 125 can be better ensured; meanwhile, the adjustment of the gas flow is easier to realize.

In one embodiment, the adjusting valve core 31 is in threaded connection with the wall of the second valve chamber 125, and the second end of the adjusting valve core 31 is in sliding connection with the adjusting knob 32, so that the adjusting knob 32 can slide in the second valve chamber 125 while rotating, and the flow rate adjusting and on-off adjusting functions are realized. In other embodiments, the second end of the regulating valve core 31 may be screwed with the regulating knob 32, and the regulating valve core 31 can only slide in the second valve cavity 21.

The adjusting valve core 31 further comprises a screw part 313 and a sliding rod part 314, the valve rod part 312, the screw part 313 and the sliding rod part 314 are coaxially connected in sequence, the screw part 313 is in threaded connection with the inner wall of the second valve cavity 125, and the sliding rod part 314 is in sliding connection with the adjusting knob 32.

The second valve chamber 125 preferably includes a slide chamber portion 1251 and a threaded chamber portion 1252, the slide chamber portion 1251 communicates between the intake air communicating air passage 126 and the threaded chamber portion 1252, and the bore diameter of the slide chamber portion 1251 is smaller than that of the threaded chamber portion 1252, thereby forming a limited step surface between the slide chamber portion 1251 and the threaded chamber portion 1252. The external diameter of screw portion 313 is greater than the external diameter of valve rod portion 312, and valve rod portion 312 and the chamber wall sliding fit of sliding chamber portion 1251, screw portion 313 and spiro union chamber portion 1252 threaded connection, the terminal surface of screw portion 313 can with spacing step face butt simultaneously to the degree of depth in restriction shutoff head 311 inserts the intercommunication air flue 126 that admits air, avoids adjusting the chamber wall of valve core 31 and second valve chamber 125 and produces the collision.

The valve rod 312 is provided with a sealing groove, a first sealing ring 33 is arranged in the sealing groove, and the valve rod 312 and the cavity wall of the second valve cavity 125 are sealed through the first sealing ring 33. Only one first seal ring 33 may be provided, or a plurality of first seal rings may be provided at intervals in the longitudinal direction of the valve stem portion 312.

In order to limit the adjusting valve core 31 from being separated from the second valve cavity 125, the second seat portion 122 is detachably connected with a limiting member 34, and the limiting member 34 can be abutted against one end surface of the screw portion 313 far away from the blocking head portion 311 to limit the adjusting valve core 31 from moving in a direction far away from the first valve cavity 124, i.e. to limit the adjusting valve core 31 from being separated from the second valve cavity 125, thereby improving the safety and reliability of the adjusting valve core 31 and the adjusting valve assembly 3.

In one embodiment, a limiting insertion hole is formed through the second seat 122, the limiting member 34 is a rod-shaped structure, the limiting member 34 is inserted into the limiting insertion hole, and the limiting member 34 is partially located in the second valve cavity 125 and can abut against an end surface of the screw portion 313. This kind of locating part 34's structure setting, the dismouting convenience is strong.

The first end of the limiting member 34 preferably protrudes out of the second seat 122, so that a user can insert and pull the limiting member 34 conveniently. Further, the first end of the position-limiting member 34 is in threaded fit with the position-limiting insertion hole, so as to improve the stability of the position-limiting member 34 on the second seat portion 122.

As shown in fig. 3 and 6, the adjusting knob 32 includes an external rotating sleeve portion 321 and an internal sliding sleeve portion 322 coaxially and at an interval, and a connecting rib portion is connected between the external rotating sleeve portion 321 and the internal sliding sleeve portion 322. The external rotating sleeve portion 321 is rotatably connected with the housing 5, and the sliding rod portion 314 is slidably inserted into the internal sliding sleeve portion 322. The switch button 41 is slidably fitted between the inner slide portion 222 and the outer turn sleeve portion 321, and avoids the connecting rib portion. The structure of the adjusting knob 32 is convenient for the connection of the adjusting knob 32 with the shell 5 and the adjusting valve core 31, and is also beneficial to providing space for the installation of the switch button 41, thereby effectively improving the structure compactness.

The upper end of the housing 5 is formed with a top opening 502, and the adjustment knob 32 is mounted in the top opening 502. Preferably, the sidewall of the top opening 502 is inwardly provided with an annular flange portion 58; the outer side wall of the external rotating sleeve part 321 is provided with an annular mounting ring groove 3211, and the flange part 58 extends into the mounting ring groove 3211, so that the mounting limitation of the adjusting knob 32 on the shell 5 can be realized, the adjusting knob 32 is prevented from sliding along the direction of the rotation axis of the shell 5 relative to the shell 5, and the mounting stability of the adjusting knob 32 on the shell 5 is improved.

In one embodiment, the central hole of the inner sliding sleeve portion 322 is a rectangular hole, and the sliding rod portion 314 is a rectangular rod-shaped structure, so that the inner sliding sleeve portion 322 and the sliding rod portion 314 can be prevented from rotating relatively, and the adjustment reliability can be improved. In other embodiments, the central hole of the inner sliding sleeve portion 322 and the cross section of the sliding rod portion 314 may also be other structures capable of stopping rotation, for example, the central hole may be a D-shaped hole.

As shown in fig. 6, the ignition assembly 4 includes an ignition button 41 and an igniter 42 disposed outside the valve body 1, and the ignition assembly 4 is configured to trigger the igniter 42 to ignite by pressing the ignition button 41. In one embodiment, the ignition button 41 is slidably disposed inside the adjusting knob 32, and the sliding direction of the ignition button 41 is the same as the rotating axis direction of the adjusting knob 32. The ignition button 41 and the adjusting knob 42 are slidably sleeved, so that the structure compactness can be improved, the overall size of the spray gun is reduced, and the operation of the switch button 41 is facilitated.

The switch button 41 includes a pressing sleeve 411, the pressing sleeve 411 is a cylindrical structure with one end open and one end closed, the open end of the pressing sleeve 411 faces the adjusting valve core 31, and the closed end protrudes upwards to the adjusting knob 32, so as to facilitate the pressing operation of the user. The side wall of the switch button 41 is provided with an avoiding notch for avoiding the connecting rib part. Preferably, the outer side wall of the pressing sleeve 411 is in sliding fit with the inner wall of the external rotating sleeve portion 321, so that a gap between the pressing sleeve 411 and the external rotating sleeve portion 321 is reduced, impurities such as dust are prevented from entering the gap, the pressing smoothness of the switch button 41 is improved, and the use safety and the cleaning convenience of the spray gun are improved.

The switch button 41 has an initial state and a pressed state, when the switch button 41 is in the initial state, the blocking end of the switch button 41 protrudes out of the adjusting knob 32 and the inner end of the switch button 41 is spaced from the igniter 42; when the switch knob 41 is in a pressed state, the switch knob 41 is slidingly pressed inward relative to the adjustment knob 32 and triggers the igniter 42 to perform an ignition operation.

In order to improve the operational convenience of the switch knob 41, the switch knob 41 further includes an elastic member 43, and the elastic member 43 is used to restore the switch knob 41 from the pressed state to the initial state. That is, after the user finishes the ignition and releases the switch button 41, the switch button 41 can be automatically reset, so that the next ignition operation is facilitated.

In one embodiment, the elastic member 43 is sleeved on the inner sliding sleeve portion 322, one end of the elastic member 43 is fixed relative to the connecting rib portion, and the other end of the elastic member 43 abuts against the closed end of the switch button 41. When the switch knob 41 is in a pressed state, the elastic member 43 is in a compressed state.

As shown in fig. 6 and 7, the ignition button 41 preferably includes a pressing ring 412, the pressing ring 412 includes a ring portion 4121, the ring portion 4121 is connected to the open end surface of the pressing sleeve 411, the width of the ring portion 4121 is larger than the wall thickness of the pressing sleeve 411, and the ring portion 4121 can abut against the igniter 42 to trigger the igniter 42 to perform an ignition operation. By providing the press ring 412, the contact area between the ignition button 41 and the igniter 42 can be increased without increasing the thickness of the pressing sleeve 411, and the ignition reliability can be improved.

In one embodiment, the ring portion 4121 has a stopper lug 4122 extending radially, and the stopper lug 4122 is located on a side of the outer sleeve portion 321 facing the adjustment spool 31 and is capable of abutting against an inner end surface of the outer sleeve portion 321. This can restrict the outward escape of the switch knob 41 from the adjustment knob 32, and improve the convenience of installation of the switch knob 41. The restricting ears 4122 are preferably provided at least two at intervals in the circumferential direction of the ring portion 4121 to improve the restricting effect.

The press ring 412 is preferably engaged with the press sleeve 411 to improve the convenience of attachment and detachment of the both. In one embodiment, the pressing ring 412 further includes a clamping arm 4123, and the clamping arm 4123 extends along the axial direction of the pressing sleeve 411 and is located inside the pressing sleeve 411. A bayonet is formed in the side wall of the pressing sleeve 411, and the end of the clamping arm 4123 is clamped into the bayonet. The click arm portions 4123 are preferably provided at least two at intervals in the circumferential direction of the ring portion 4121 to improve the convenience of connection of the pressing sleeve 411 and the pressing ring 412.

As shown in fig. 4, the on-off valve assembly 2 has an open state and a closed state, and when the on-off valve assembly 2 is in the open state, the first valve chamber 124 communicates with the intake passage 111; when the switch valve component 2 is in a closed state, the switch valve component 2 blocks the air outlet of the air inlet channel 111; the switch valve assembly 2 has an elastic return member 23, and the elastic return member 23 is used to maintain or return the switch valve assembly 2 to a closed state. With the arrangement, when the spray gun is used, the first valve cavity 124 and the air inlet channel 111 can be always communicated by pressing the pressing end of the switch valve component 2; when the spray gun is suspended, only the pressing end of the switch valve component 2 needs to be released, the on-off control convenience of the switch valve component 2 is high, and the probability of misoperation is effectively reduced.

The switch valve assembly 2 further includes a switch valve core 21 and a pushing member 22, the switch valve core 21 is installed in the first valve cavity 124, a first end of the pushing member 22 is exposed outside the first valve cavity 124 and forms a pressing end, and a second end of the pushing member 22 is slidably installed in the first valve cavity 124 and can push against one end of the switch valve core 21 so that the switch valve core 21 selectively blocks the air outlet of the air inlet passage 111. A first end of the elastic restoring member 23 extending along the sliding direction of the abutting member 22 is fixed relative to the abutting member 22, and a second end of the elastic restoring member 23 is fixed relative to the valve seat portion 12. When the on-off valve assembly 2 is in the open state, the elastic restoring member 23 is compressed.

In one embodiment, the switch valve core 21 is an air valve core, and the switch valve core 21 includes a mounting shell 211, a plunger 212 slidably disposed through the mounting shell 211, and a piston 213 slidably disposed through the mounting shell 211; the mounting shell 211 is fixedly mounted in the first valve cavity 124, the piston 213 is connected to the push rod 212 and located on a side of the push rod 212 away from the abutting part 22, a sliding direction of the push rod 212 and the piston 213 is the same as a sliding direction of the abutting part 22, the abutting part 22 can abut against the push rod 212, and the piston 213 is used for sealing an air outlet of the air inlet passage 111. The structure of the air valve core can adopt the existing structure, and the embodiment does not limit the structure.

The pushing part 22 is slidably installed in the first valve cavity 124, preferably, the pushing part 22 includes a pressing part 221, a sliding part 222 and a pushing part 223 which are coaxially connected in sequence, the sliding part 222 is in sliding and sealing fit with the inner cavity wall of the first valve cavity 124, the pushing part 223 is located on the inner side of the sliding part 222 and can be abutted against the second end of the push rod 212, the pressing part 221 extends out of the outer side of the valve body 1 for a user to press, and the tail end of the pressing part 221 forms a pressing end. Preferably, a sealing ring groove is formed on the sliding portion 222, a second sealing ring 24 is disposed in the sealing ring groove, and the pushing element 22 and the cavity wall of the second sliding cavity are sealed by the second sealing ring 24, so as to prevent the gas from flowing out of the valve body 1 from the opening of the first valve cavity 124.

The outer diameter of the abutting portion 223 is smaller than the outer diameter of the sliding portion 222, the elastic member 43 is sleeved on the abutting portion 223, the first end of the elastic member 43 abuts against the end surface of the sliding portion 222, and the second end of the elastic member 43 is fixed relative to the valve body 1. Preferably, the first valve cavity 124 includes a valve core cavity 1242 and a pushing cavity 1241, the bore diameter of the valve core cavity 1242 is smaller than the bore diameter of the pushing cavity 1241, the switch valve core 21 is installed in the valve core cavity 1242, the elastic element 43 and the pushing element 22 are both installed in the pushing cavity 1241, and the second end of the elastic element 43 abuts against the bottom of the pushing cavity 1241.

In order to prevent the abutting member 22 from falling out of the first valve cavity 124, the switch valve assembly 2 further includes a cover 25, the cover 25 is detachably connected to the outer side of the first seat portion 121 and blocks the opening of the first valve cavity 124, the pressing portion 221 slides through the cover 25, and the sliding portion 222 can abut against the inner end surface of the cover 25, thereby restricting the abutting member 22 from falling out of the first valve cavity 124. The cover 25 is preferably screw-coupled to an outer sidewall of the first seat 121 to improve coupling reliability of the cover 25.

As shown in fig. 2, 5 and 6, the housing 5 includes two half shells 5a that are fastened and connected along a third direction, the third direction is perpendicular to both the first direction and the second direction, a mounting cavity is formed after the two half shells 5a are fastened, the mounting cavity has a bottom opening 503, a top opening 502, a front opening 501 and a side opening 504, the air inlet connector 7 is exposed through the bottom opening 503, the adjusting knob 32 is mounted at the top opening 502, the end of the injection pipe portion 13 extends out of the housing 5 through the side opening 504, and the outer end of the pushing member 22 is exposed through the side opening 504.

Each half shell 5a comprises a shell-like main shell part 51, the main shell part 51 comprises a grip shell part 511 and an injection shell part 512, the grip shell part 511 extends substantially along the first direction, and the grip shell parts 511 of the two half shells 5a are buckled and connected to wrap the grip rod part 11; the ejection shell portion 512 extends along the second direction, the ejection shell portion 512 of the two half shells 5a is covered on the outer side of the ejection tube portion 13 after being buckled, and the valve seat portion 12 is correspondingly arranged at the connection position of the holding shell portion 511 and the ejection shell portion 512. With such an arrangement, the overall structural compactness of the spray gun can be improved, and the bottom opening 503, the top opening 502, the front opening 501 and the lateral opening 504 are all formed by enclosing two half shells 5 a.

In order to improve the mounting stability of the valve body 1 in the housing 5, a plurality of limiting ribs 52 are convexly provided on the inner side of the main shell 51 of each half shell 5a, a valve body mounting area is surrounded by the limiting ribs 52, the valve seat 12 is mounted in the mounting area, and the limiting ribs 52 abut against the outer side wall of the valve body 1. Further, the valve seat portion 12, the grip stem portion 11, and the spout tube portion 13 are provided with stopper rib portions 52 on opposite sides thereof to provide positioning and stopper for the mounting of the grip stem portion 11, the valve seat portion 12, and the spout tube portion 13.

In one embodiment, the connecting portion between the holding rod 11 and the first seat 121, the connecting portion between the first seat 121 and the connecting seat 123, and the connecting portion between the connecting seat 123 and the second seat 122 are provided with a limiting rib portion 52, so as to improve the limiting effect and ensure the mounting limitation of the valve body 1 in each direction.

Preferably, an igniter mounting area is defined by the plurality of limiting ribs 52 of the half shell 5a, the igniter 42 is accommodated in the igniter mounting area, and opposite sides of the igniter 42 are respectively abutted to the inner surface of the half shell 5a and the outer side surface of the valve body 1, so that the igniter 42 can be stably mounted in the shell 5 without fixing the igniter 42 in other ways, and the convenience of mounting and dismounting the spray gun is improved.

In one embodiment, the inner side of each half shell 5a is provided with a support rib 53, and two pairs of two sides of the valve body 1 along the third direction are respectively abutted to the support ribs 53 of the two half shells 5a, so that the valve body 1 is clamped between the two support ribs 53, and the housing 5 is not required to be tightly connected with the valve body 1, and the stable installation of the valve body 1 in the housing 5 can be ensured only by the arrangement of the support ribs 53 and the limit ribs 52.

The two half-shells 5a are preferably screwed together to increase the stability of the connection. Each half shell 5a further includes a stud portion 54 protruding from the inner side of the shell portion 51, the stud portions 54 of the two half shells 5a are correspondingly disposed, and a connection through hole is opened on the stud portion 54 of one half shell 5a, a threaded hole is opened on the stud portion 54 of the other half shell 5a, and the two half shells 5a are connected through a threaded member penetrating through the threaded hole and the connection through hole. Preferably, a plurality of stud portions 54 are provided on each of the housing halves 5a, and at least one stud portion 54 is provided on each of the grip shell portion 511, the ejection shell portion 512, and the connection therebetween.

In one embodiment, the two half shells 5a are connected by clamping at the same time, so as to reduce the number of screw members and improve the convenience of assembling and disassembling the two half shells 5 a. Specifically, the fastening surface of one half of the case 5a is provided with a fastening protrusion 56 in a protruding manner, the fastening surface of the other half of the case 5a is provided with a fastening groove, and the fastening protrusion 56 is fastened in the fastening groove. The number and the arrangement position of the clamping protrusions 56 can be set according to the requirement, which is not limited in this embodiment.

As shown in fig. 2, 6 and 8, in order to improve the operation convenience of the spray gun, the spray gun further comprises an external operating assembly 6, the external operating assembly 6 is mainly located outside the housing 5 and movably connected with the housing 5, and the external operating assembly 6 can actuate the pushing member 22 to switch the switch valve assembly 2 between the open state and the closed state.

In one embodiment, the external operating assembly 6 comprises a trigger 61, the trigger 61 being movably connected to the outside of the housing 5 and capable of abutting against the pressing end to actuate the switch valve assembly 2. The trigger 61 is arranged so that a user can press the switch valve assembly 2 by pulling the radius, and the operation comfort and the operation convenience of the user can be improved.

The trigger 61 is disposed corresponding to the lateral opening 504 of the housing 5 and abuts against the pressing end of the pusher 22. In one embodiment, the trigger 61 is rotatably connected to the housing 5 such that rotation of the trigger 61 slides against the pusher 22 to improve the reliability of the operation of the trigger 61 and reduce the gap between the trigger 61 and the housing 5. In other embodiments, the trigger 61 can be slidably connected to the housing 5 to push against the pusher 22. Preferably, the lower end of the trigger 61 is rotatably connected with the housing 5, and the upper end of the trigger 61 is abutted against the abutting piece 22, so that the acting force of the abutting piece 22 is saved, and the action convenience and comfort of the spray gun are improved.

In order to improve the convenience of connecting the trigger 61 to the housing 5, the trigger 61 includes a trigger housing 611 and a rotating plate 613 connected to the inner side of the lower end of the trigger housing 611, the rotating plate 613 extends into the inner side of the housing 5 and is rotatably connected to the housing 5, and the trigger housing 611 is located outside the housing 5 and can block the lateral opening 504.

Preferably, the trigger shell 611 is an arc-shaped plate-like structure opening towards the lateral opening 504 to enable wrapping and shielding of the lateral opening 504 and to facilitate interfacing with the two half-shells 5a to improve the overall aesthetic appearance of the spray gun. Preferably, the outer housing 5 is surrounded by a trigger slot 507 outside the lateral opening 504, the shape of the trigger slot 507 is matched with the shape of the trigger shell 611, and when the trigger 61 is in a pressed state, the trigger shell 611 can be accommodated in the trigger slot 507 and abut against the bottom of the trigger slot 507, so that the pressing depth of the trigger 61 can be limited by the abutment of the bottom of the trigger slot 507 and the trigger shell 611, and the switch valve assembly 2 is prevented from being damaged.

In actual use, the trigger case 611 is located below the ejection case portion 512 and on the front side of the grip case portion 511, and the entire trigger case 61 extends from the grip case portion 511 to below the ejection case portion 512, so as to increase the area of the trigger 611 and improve the operational convenience and comfort of the user for pressing the grip case portion 611.

The rotating plates 613 are preferably provided one on each side in the width direction of the trigger case 611, that is, the rotating plates 613 are provided two at a time in the third direction, and the two rotating plates 613 are rotatably connected to the two case halves 5a, respectively. Preferably, a rotating shaft portion 57 is convexly provided on the inner side of each main housing portion 51, the rotating plate 613 is provided with a mounting hole, and the rotating shaft portion 57 is inserted into the mounting hole and is in clearance fit with the mounting hole.

In one embodiment, the mounting hole is preferably an open arc-shaped hole, and the central angle of the arc-shaped hole is greater than 180 ° and less than 250 ° to improve the convenience of connecting the mounting plate and the rotating shaft portion 57, so that the rotating shaft portion 57 can be inserted into or withdrawn from the mounting hole by pressing the opening of the arc-shaped hole. In other embodiments, the mounting hole may be a closed circular hole.

In one embodiment, to improve the convenience of the trigger 61 pushing against the pushing element 22, the trigger 61 is further protruded inside the upper end of the trigger case 611 to push against the convex column 612, the free end of the convex column 612 extends into the housing 5, and the convex column 612 is disposed opposite to and contacts the pushing element 22.

An insertion opening 505 is formed through the slot bottom of the trigger slot 507, the pushing convex column 612 is inserted into the housing 5 through the insertion opening 505, and the width of the insertion opening 505 in the third direction is substantially equal to the width of the pushing convex column 612 in the third direction, so that the pushing convex column 612 is limited to shake in the third direction relative to the housing 5. And the pushing convex column 612 can abut against a groove wall of the insertion opening 505 at a side far from the pushing piece 22, so as to limit the pushing convex column 612 to be separated from the insertion opening 505.

As shown in fig. 6-10, in one embodiment, the spray gun further comprises a locking member 62, the locking member 62 has a locked state and an unlocked state, when the locking member 62 is in the unlocked state, the trigger 61 can be linked with the switch valve assembly 2 so that the pressing end can be pressed or released, and when the locking member 62 is in the locked state, the locking member 62 restricts the movement of the trigger 61 so that the switch valve assembly 2 is maintained in the open state or the closed state.

That is, by providing the lock 62, when the lock 62 is in the locked state, the pressing operation of the trigger 61 is restricted, so that the switch valve assembly 2 is ensured to be stably in the closed state, and it is ensured that no gas passes through the valve body 1, thereby improving the safety and reliability of the spray gun. And/or, when the locking piece 62 is in a locking state, the release of the pressing end is limited, so that the trigger 61 keeps a state of pressing the switch valve assembly 2, the problems of easy operation fatigue and easy fire interruption caused by the fact that a user always needs to press the trigger 61 when using the spray gun are avoided, and the use convenience and the use reliability of the spray gun are improved.

In one embodiment, the locked state includes: a first locking state in which the switch valve assembly 2 is in the closed state when the lock member 62 is in the first locking state, and the lock member 62 abuts against a side of the trigger 61 toward the pressing end to restrict the trigger 61 from pressing the pressing end; and/or a second locking state, when the locking piece 62 is in the second locking state, the switch valve assembly 2 is in the opening state, and the locking piece 62 is abutted with one side of the trigger 61, which is far away from the pressing end, so as to limit the release of the pressing end.

In order to improve the operational convenience of switching the lock member 62 between the unlocked state and any one of the locked states, the lock member 62 is inserted through the housing 5, and the lock member 62 can slide relative to the housing 5 to switch the lock member 62 between the locked state and the unlocked state. That is, when operating, by pushing the lock member 62, switching of the lock member 62 between the locked state and the unlocked state can be realized, the operation convenience is strong, and the occupied space of the lock member 62 is small. In other embodiments, the locking member 62 may be rotatably connected to the housing 5 to switch the locking member 62 between the locked state and the unlocked state.

It is to be understood that the state switching of the lock member 62 between the locked state and the unlocked state described above refers to switching between the unlocked state and the first locked state, and switching between the unlocked state and the second locked state.

In one embodiment, the locking member 62 slides in the third direction, which saves the space required for the locking member 62 to move, and reduces the probability of interference between the locking member 62 and other structures. In other embodiments, the locking member 62 can also slide in a direction away from or toward the pushing post 612.

To improve the convenience of operation of the locking member 62, at least one end of the locking member 62 is exposed out of the housing 5, so that the user can push the locking member 62 conveniently. In the present embodiment, both ends of the locking member 62 can be exposed out of the housing 5.

In an embodiment, the locking member 62 includes a sliding main body 621 extending along the third direction, a limiting convex portion 622 is convexly disposed on a lower side surface of the sliding main body 621, an avoiding port 623 having an opening facing the pushing convex column 612 is disposed on the limiting convex portion 622, the avoiding port 623 is disposed in a penetrating manner along a pressing direction of the pressing end, and when the locking member 62 is in an unlocked state, a free end of the pushing convex column 612 passes through the avoiding port 623; when the locking member 62 is in the locked state, the limiting convex portion 622 can abut against the abutting-pushing convex column 612.

When the locking member 62 is in the first locking state, the upper end of the abutting-pushing convex column 612 is disposed opposite to the limiting convex portion 622, and one side of the abutting-pushing convex column 612 facing the switch valve assembly 2 abuts against the limiting convex portion 622, so that the abutting-pushing convex column 612 is limited to move along the direction facing the abutting-pushing member 22, that is, the trigger 61 is limited to be pressed down. When the locking member 62 is in the second locking state, the locking member 62 abuts against a side of the abutting-pushing convex column 612 departing from the pressing end, so that the abutting-pushing convex column 612 is clamped between the locking member 62 and the pressing end of the abutting-pushing member 22, and the abutting-pushing convex column 612 is limited to move in a direction away from the pressing end, that is, the pressing end is limited to be released. When the locking member 62 is in the unlocked state, the pushing convex column 612 is disposed opposite to the avoiding opening 623, and the tail end of the pushing convex column 612 can pass through the avoiding opening 623, that is, the pushing convex column 612 can move towards the switch valve assembly 2, so as to press and rebound the trigger 61.

Preferably, a first limit groove 6221 is formed in a side of the abutting-pushing convex column 612 away from the sliding body 621, an opening of the first limit groove 6221 faces the end of the abutting-pushing convex column 612, a groove wall of the first limit groove 6221 can be attached to a side of the abutting-pushing convex column 612 facing the abutting-pushing piece 22, and the shape of the first limit groove 6221 is consistent with the shape of the end of the abutting-pushing convex column 612, so that the contact area between the abutting-pushing convex column 612 and the limit convex portion 622 can be increased, and the stopping effect on the trigger 61 is increased.

The side of the pushing convex column 612 facing the pushing piece 22 is provided with a second limit groove 6222, when the locking piece 62 is in the second locking state, the pushing convex column 61 is attached to the groove wall of the second limit groove 6222, so as to increase the contact area between the pushing convex column 612 and the limit protrusion 622 and increase the stopping effect on the trigger 61.

In one embodiment, the end of the pushing convex column 612 is in a semi-arc shape, and the first limit groove 6221 is an arc-shaped groove, so as to reduce the scraping between the pushing convex column 612 and the bottom of the first limit groove 6221, and improve the service life of the pushing convex column 612 and the locking piece 62.

In order to ensure that the locking member 62 can reliably slide to the locked state and the unlocked state, at least two locking grooves 624 are formed on the sliding body 621, a locking protrusion 55 is convexly arranged on the inner wall of the housing 5, and the locking protrusion 55 can be locked into any one of the locking grooves 624. When the locking piece 62 is in the locking state, the clamping protrusion 55 is clamped into one of the clamping grooves 624, and when the locking piece 62 is in the unlocking state, the clamping protrusion 55 is clamped into the other clamping groove 624, so that whether the locking piece 62 slides to the unlocking state or the locking state can be judged through the matching of the clamping protrusion 55 and the clamping groove 624; meanwhile, the locking piece 62 can be stably kept in a locking state or an unlocking state through the matching of the clamping protrusion 55 and the clamping groove 624, the use reliability of the locking piece 62 is improved, and the use safety and the use reliability of the spray gun are improved.

It is understood that only two card slots 624 may be provided, i.e., the card protrusions 55 may be engaged in the same card slot 624 when the locking member 62 is in the first locking state or the second locking state. In other embodiments, there may be three engaging grooves 624, that is, when the locking member 62 is in the first locking state, the engaging protrusion 55 is engaged in one of the engaging grooves 624, and when the locking member 62 is in the second locking state, the engaging protrusion 55 is engaged in the other engaging groove 624.

In this embodiment, at least two locking grooves 624 are disposed at intervals along the sliding direction of the sliding main body 621, so that the locking protrusions 55 can be locked or released into the locking grooves 624 by the sliding of the locking member 62, and the operation convenience is high.

In one embodiment, the locking member 62 is located between the injection pipe portion 13 and the pushing boss 612, and a relief groove 625 is formed on one side of the locking member 62 away from the pushing boss 612, and the relief groove 625 is opposite to the injection pipe portion 13, so as to prevent the locking member 62 from interfering with the injection pipe portion 13.

In an embodiment, the cross-sectional area of the pushing convex column 612 is gradually reduced along the direction far away from the trigger case 611, so that the structural strength of the pushing convex column 612 near the root of the trigger case 611 is higher, the pushing convex column 612 is not easily broken after being stressed, and the use safety and reliability of the trigger 61 are improved. The abutting position of the pressing end of the abutting member 22 and the abutting convex column 612 is preferably close to the root of the abutting convex column 612.

The lance also includes a tip, not shown, connected to the forward end opening 501, the end of the tip remote from the forward end opening 501 forming a firing orifice, the end of the lance portion 13 being located within the tip. The shell 5 is further provided with a heat insulation ring 8 at the front end opening 501, and the heat insulation ring 8 is sleeved outside the injection pipe part 13 to reduce the heat transferred from the ignition port to the shell 5.

Other structural settings of rifle head, thermal-insulated ring 8 and spray gun can refer to prior art, this is not the utility model discloses a key, no longer give unnecessary details here.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The details of the foregoing embodiments are merely representative of several embodiments of the present invention, which are described in more detail and detail, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. Spray gun, its characterized in that includes:

the gas valve comprises a valve body (1), wherein a gas inlet channel (111), a first valve cavity (124), a second valve cavity (125) and a gas outlet air channel (131) are arranged in the valve body (1), a jet orifice is formed at the tail end of the gas outlet air channel (131), the gas inlet channel (111) is used for introducing gas, and a gas inlet of the gas outlet air channel (131) and the first valve cavity (124) can be communicated with the second valve cavity (125);

a switch valve assembly (2) having one end mounted to the first valve chamber (124) and the other end exposed to the valve body (1) to form a pressing end, wherein the selective communication between the first valve chamber (124) and the air inlet passage (111) is achieved by pressing the pressing end of the switch valve assembly (2);

a regulator valve assembly (3) disposed at least partially within the second valve chamber (125), the regulator valve assembly (3) being configured to regulate a flow of gas from the first valve chamber (124) to the gas outlet passageway (131);

the ignition assembly (4) is used for igniting the fuel gas in the gas outlet air channel (131) to form sprayed flame.

2. The spray gun of claim 1 further comprising:

the outer shell (5) is wrapped on the outer side of the valve body (1), and the pressing end and the operation end of the regulating valve assembly (3) are exposed out of the outer shell (5);

a trigger (61) movably connected to the outside of the housing (5) and capable of abutting against the pressing end to actuate the switch valve assembly (2).

3. The spray gun according to claim 2, characterized in that the on-off valve assembly (2) has an open state that opens the first valve chamber (124) and the air inlet passage (111) and a closed state that blocks the first valve chamber (124) and the air inlet passage (111) from communicating;

the spray gun further comprises a locking piece (62), the locking piece (62) has a locking state and an unlocking state, when the locking piece (62) is in the unlocking state, the trigger (61) can be linked with the switch valve assembly (2) to enable the pressing end to be pressed or released, and when the locking piece (62) is in the locking state, the locking piece (62) limits the movement of the trigger (61) to enable the switch valve assembly (2) to be kept in the opening state or the closing state.

4. The spray gun of claim 3 wherein said locked condition comprises:

a first locking state in which the switch valve assembly (2) is in the closed state and the lock member (62) abuts with a side of the trigger (61) toward the pressing end to restrict the trigger (61) from pressing the pressing end when the lock member (62) is in the first locking state;

and/or a second locking state, when the locking piece (62) is in the second locking state, the switch valve assembly (2) is in the opening state, and the locking piece (62) is abutted with one side, away from the pressing end, of the trigger (61) to limit the release of the pressing end.

5. Spray gun according to claim 3, characterized in that said locking member (62) is arranged through said housing (5) and said locking member (62) is slidable with respect to said housing (5) to switch said locking member (62) between said locked state and said unlocked state;

and/or at least one end of the locking piece (62) is exposed out of the shell (5).

6. The spray gun of claim 3, wherein the locking member (62) is provided with at least two clamping grooves (624) at intervals, and the housing (5) is provided with a clamping protrusion (55);

when the locking piece (62) is in the locking state, the clamping protrusion (55) is clamped in the clamping groove (624);

when the locking piece (62) is in the unlocking state, the clamping protrusion (55) is clamped in the other clamping groove (624).

7. The spray gun of claim 4, wherein the trigger (61) comprises a trigger shell (611) and a pushing convex column (612) which is arranged at the upper end of the trigger shell (611) in a protruding manner, the trigger shell (611) is positioned at the outer side of the outer shell (5), the lower end of the trigger shell is rotatably connected with the outer shell (5), the free end of the pushing convex column (612) extends into the outer shell (5), and the pushing convex column (612) is abutted against the pressing end;

when the locking piece (62) is in the first locking state, the locking piece (62) is abutted against one side, facing the pressing end, of the abutting-pushing convex column (612), and when the locking piece (62) is in the second locking state, the locking piece (62) is abutted against one side, facing away from the pressing end, of the abutting-pushing convex column (612).

8. The spray gun of claim 7, wherein an avoidance port (623) is formed in the locking member (62), the avoidance port (623) is arranged in a penetrating manner along a pressing direction of the pressing end, and when the locking member (62) is in the unlocked state, a free end of the pushing boss (612) penetrates through the avoidance port (623);

and/or one side of the locking piece (62) departing from the pressing end is provided with a first limiting groove (6221) with an opening facing the pushing convex column (612), and when the locking piece (62) is in the first locking state, one side of the pushing convex column (612) facing the pressing end is attached to the groove wall of the first limiting groove (6221);

and/or a second limit groove (6222) is formed in one side, facing the pressing end, of the locking piece (62), and when the locking piece (62) is in the second locking state, one side, facing away from the pressing end, of the abutting-pushing convex column (612) is abutted to the groove wall of the second limit groove (6222).

9. The spray gun according to any one of claims 1 to 8, characterized in that the on-off valve assembly (2) has an open state for communicating the first valve chamber (124) with the air inlet passage (111) and a closed state for blocking communication between the first valve chamber (124) and the air inlet passage (111);

the switch valve component (2) is provided with an elastic resetting piece (23), and the elastic resetting piece (23) is used for keeping or resetting the switch valve component (2) to the closed state.

10. The spray gun according to any one of claims 2 to 8, characterized in that the regulator valve assembly (3) comprises a regulating knob (32) and a regulating valve core (31), a first end of the regulating valve core (31) is slidably inserted into the second valve chamber (125), a second end of the regulating valve core (31) is connected with the regulating knob (32), and the regulating knob (32) is rotatably mounted on the housing (5) to slide the regulating valve core (31) in the second valve chamber (125);

ignition subassembly (4) include ignition button (41) and set up in the some firearm (42) in the valve body (1) outside, ignition button (41) slip cover is established adjust knob (32) inboard, just the slip direction of ignition button (41) with adjust knob (32) the axis of rotation direction is the same, ignition subassembly (4) are configured as through pressing ignition button (41) trigger some firearm (42) are igniteed.

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