A mixture material spray gun

Abstract

The utility model relates to the technical field of spray gun, concretely relates to a mixed material spray gun, including spray gun body, be equipped with the trigger for controlling the spray on spray gun body and the spray head connected with spray gun body front end, the rear end or side portion of spray gun body passes through at least two feed pipes and is different with different material source communication respectively for conveying the material to be mixed to spray gun body inside, spray gun body inside is sequentially provided with mixed cavity, discharge cavity and the like functional cavity along the spray direction, and each functional cavity is communicated each other through the internal passage, spray gun body inside is provided with mixed cavity, and mixed cavity is located between the material confluence position of feed pipe and spray head, and the material from different feed pipes enters spray gun body and converges into mixed cavity. Compared with the prior art, the application can change the flow gap or effective flow area between the mixing core and the inner wall of the mixing chamber, thereby changing the flow rate, shear strength and mixing degree of the material in the mixing chamber.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, and in particular to a spray gun for mixing materials. Background Technology

[0002] In industrial fields such as petrochemicals, coating, spraying, and multi-component material handling, it is often necessary to mix two or more materials inside a spray gun before spraying. Existing mixed material spray guns typically include a spray gun body, a feed channel, a mixing chamber, and a nozzle. Different materials enter the spray gun body through their respective feed channels, are mixed in the mixing chamber, and then the mixed material is sprayed out through the nozzle.

[0003] In existing technologies, the mixing structure of mixing spray guns is mostly fixed, making it difficult to adjust the mixing intensity and state after design. When the viscosity, proportion, or operating conditions of the materials to be mixed change, the fixed mixing structure often fails to meet different usage requirements, easily leading to insufficient mixing or excessive flow resistance. Furthermore, materials used in petrochemical and similar industries typically have high viscosity, are prone to coking or deposition, and the mixing chamber and components are prone to adhesion and blockage during long-term use. Existing technologies typically require stopping the spray gun, disassembling, and cleaning to address mixing chamber blockage, a cumbersome maintenance process that affects continuous operation efficiency. While some spray guns have backflushing or rinsing structures, their rinsing flow paths are relatively simple, with limited rinsing medium coverage, and are prone to media backflow or crossflow during rinsing, affecting rinsing effectiveness and even causing material contamination. Therefore, this invention proposes a mixing spray gun to meet the needs of improved mixing intensity adjustment and online cleaning capabilities. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a mixing spray gun to solve the problem that when the viscosity, ratio or working conditions of the materials to be mixed change, the fixed mixing structure often cannot meet different usage requirements, and is prone to insufficient mixing or excessive flow resistance.

[0005] To achieve the above objectives, this utility model provides a mixing spray gun, comprising a spray gun body, a trigger, a nozzle, and at least two feed pipes communicating with the spray gun body. The spray gun body contains a mixing chamber, which communicates with the nozzle. A mixing core is provided within the mixing chamber, and a baffle plate is provided around the outer periphery of the mixing core to turbulently mix the material entering the mixing chamber. The spray gun body is provided with an adjustment mechanism for adjusting the axial position of the mixing core within the mixing chamber. The adjustment mechanism includes a mounting sleeve, an adjustment knob, an elastic element, and a moving rod. The adjustment knob drives the moving rod to move axially through the mounting sleeve, and the moving rod is connected to the mixing core. The mixing core is axially displaced by the elastic element, which applies a pre-tightening and restoring force to the moving rod and the mixing core. The spray gun body is also provided with a backflush port, a flushing chamber, and a discharge chamber. The flushing chamber is connected to the mixing chamber through a flow hole, and the mixing chamber is connected to the discharge chamber through a release port. A one-way valve is provided at the release port, so that the medium in the mixing chamber can only flow in the direction from the mixing chamber to the discharge chamber. The discharge chamber is provided with a discharge outlet. Thus, during backflushing, the gas or liquid flushing medium enters the flushing chamber through the backflush port and enters the mixing chamber through the flow hole to flush the mixing chamber and the mixing core. The flushed medium enters the discharge chamber through the release port and is discharged from the discharge outlet.

[0006] Preferably, the baffle is a spiral baffle structure that extends along the mixing core axis to create a spiral flow of materials within the mixing chamber and enhance mixing uniformity.

[0007] Preferably, the adjusting knob and the mounting sleeve are connected by a threaded pair, and when the adjusting knob is rotated, the rotational motion is converted into the axial displacement of the moving rod through the threaded pair.

[0008] Preferably, the elastic element is a compression spring, which is sleeved on the outside of the moving rod and abuts against the mounting sleeve and the spray gun body to provide a pre-tightening and restoring force to the moving rod.

[0009] Preferably, the axial displacement of the mixing core is used to change the flow gap or effective flow area between the mixing core and the mixing chamber, so as to adjust the shear strength and mixing intensity of the material in the mixing chamber.

[0010] Preferably, the flow holes are multiple holes distributed along the length of the flushing chamber to increase the coverage area of ​​the flushing medium entering the mixing chamber.

[0011] Preferably, the one-way valve is used to prevent the medium in the discharge chamber from flowing back into the mixing chamber.

[0012] Preferably, the adjustment mechanism is used to position the mixing core in the cleaning position during backwashing. The cleaning position is a position where the mixing core moves axially relative to the mixing chamber, causing the flow gap between the mixing core and the mixing chamber to increase, so as to reduce backwashing resistance and enhance the flushing effect of the flushing medium on the mixing core and the mixing chamber.

[0013] Preferably, the spray gun body is provided with an air inlet valve, which is used to introduce gas into the spray gun body to participate in the atomization of the nozzle, and the gas can be used as one of the rinsing media for backwashing.

[0014] Preferably, the nozzle is detachably connected to the spray gun body to facilitate the disassembly and maintenance of the mixing core and the baffle.

[0015] The beneficial effects of this utility model are: 1. A mixing core is arranged axially within the mixing chamber, and the mixing core can move axially relative to the mixing chamber; a baffle is arranged on the outer periphery of the mixing core, preferably a spiral structure, extending axially along the mixing core; when the material flows in the mixing chamber, it generates turbulence or swirling flow under the action of the baffle, thereby improving the mixing uniformity between materials; by changing the axial position of the mixing core in the mixing chamber, the flow gap or effective flow area between the mixing core and the inner wall of the mixing chamber can be changed, thereby changing the flow velocity, shear strength and mixing degree of the material in the mixing chamber.

[0016] 2. Under normal mixing and spraying conditions, the operator controls the start and stop of the spray gun by using the trigger; different materials enter the spray gun body through the feed pipe and then flow into the mixing chamber; the operator can adjust the position of the mixing core by rotating the adjustment knob according to the material viscosity, ratio or spraying conditions, so that an appropriate flow gap is formed between the mixing core and the mixing chamber; the material forms turbulence or swirl under the action of the baffle in the mixing chamber, thereby achieving full mixing, and the mixed material is sprayed out through the nozzle.

[0017] 3. When cleaning the mixing chamber and mixing core is required, the operator stops normal spraying and introduces gas and liquid flushing media into the spray gun body through the backflush port. At this time, the adjustment mechanism can be operated or configured to move the mixing core to the cleaning position. The cleaning position is the position where the mixing core moves axially relative to the mixing chamber, causing the flow gap between the mixing core and the mixing chamber to increase. In the cleaning position, the flushing media enters the flushing chamber through the backflush port and enters the mixing chamber through the flow hole, flushing the baffle of the mixing core and the inner wall of the mixing chamber. Due to the increased gap between the mixing core and the mixing chamber, the backflush resistance decreases, the flushing media flow rate increases, and the cleaning effect is enhanced. The flushed media enters the discharge chamber through the release port under the action of the one-way valve and is finally discharged from the discharge port, thus completing the backflush process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first-person perspective schematic diagram of the present invention; Figure 2 This is a second-view schematic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the spray gun body of this utility model; Figure 4 This is a partial cross-sectional view of the mixing chamber of this utility model; Figure 5 This is a schematic diagram of the flushing chamber of this utility model; Figure 6 This is a schematic diagram showing the contact state between the raw material and the mixing core of this utility model.

[0020] The markings in the diagram are as follows: 1. Spray gun body; 2. Trigger; 3. Nozzle; 4. Feed pipe; 5. Mounting sleeve; 6. Adjustment knob; 7. Elastic element; 8. Moving rod; 9. Air inlet valve; 10. Mixing chamber; 11. Backflush port; 12. Flushing chamber; 13. Flow hole; 14. Release port; 15. Mixing core; 16. Baffle plate; 17. Discharge chamber; 18. Discharge outlet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1-6As shown, a mixing spray gun includes a spray gun body 1, a trigger 2 for controlling spraying, and a nozzle 3 connected to the front end of the spray gun body 1. The rear end or side of the spray gun body 1 is connected to different material sources through at least two feed pipes 4, which are used to feed the material to be mixed into the spray gun body 1. The spray gun body 1 has functional chambers such as a mixing chamber 10 and a discharge chamber 17 arranged sequentially along the spraying direction, and the functional chambers are interconnected through internal channels. The mixing chamber 10 is located between the material confluence position of the feed pipes 4 and the nozzle 3. Materials from different feed pipes 4 enter the spray gun body 1 and then flow into the mixing chamber 10. A mixing core 15 is arranged axially inside the mixing chamber 10, and the mixing core 15 can move axially relative to the mixing chamber 10. A baffle 16 is arranged on the outer periphery of the mixing core 15, and the baffle 16 is preferably a spiral structure that extends axially along the mixing core 15. When the material flows in the mixing chamber 10, it generates a turbulent or swirling state under the action of the baffle 16, thereby improving the mixing uniformity between the materials. By changing the axial position of the mixing core 15 in the mixing chamber 10, the flow gap or effective flow area between the mixing core 15 and the inner wall of the mixing chamber 10 can be changed, thereby changing the flow velocity, shear strength and mixing degree of the material in the mixing chamber 10.

[0024] like Figures 1-3 As shown, the spray gun body 1 is provided with an adjustment mechanism for adjusting the position of the mixing core 15; the adjustment mechanism includes a mounting sleeve 5, an adjustment knob 6, an elastic element 7, and a moving rod 8; the mounting sleeve 5 is fixedly mounted on the spray gun body 1, and the adjustment knob 6 is connected to the mounting sleeve 5 by a threaded joint; when the adjustment knob 6 rotates, the rotational motion is converted into linear displacement along the spray gun axis through the threaded joint; one end of the moving rod 8 is connected to the adjustment knob 6, and the other end is connected to the mixing core 15, so that the axial displacement of the adjustment knob 6 can be transmitted to the mixing core 15, thereby driving the mixing core 15 to move axially within the mixing chamber 10; the elastic element 7 is preferably a compression spring, sleeved on the outside of the moving rod 8, and abutting against the mounting sleeve 5 and the spray gun body 15. Between the gun body 1, a pre-tightening and reset force is applied to the moving rod 8 and the mixing core 15 to keep the adjustment mechanism stable during operation and prevent the mixing core 15 from undergoing unexpected displacement due to vibration or fluid impact. Under normal mixing and spraying conditions, the operator controls the start and stop of the spray gun through the trigger 2. Different materials enter the spray gun body 1 through the feed pipe 4 and then flow into the mixing chamber 10. The operator can adjust the position of the mixing core 15 by rotating the adjustment knob 6 according to the material viscosity, ratio, or spraying conditions to form an appropriate flow gap between the mixing core 15 and the mixing chamber 10. The material forms turbulence or swirl under the action of the baffle 16 in the mixing chamber 10, thereby achieving full mixing. The mixed material is then sprayed out through the nozzle 3.

[0025] like Figure 3 and Figure 5 As shown, the spray gun body 1 is provided with a backflush port 11 and a flushing chamber 12; the backflush port 11 is used to receive gas and liquid flushing media; the flushing chamber 12 is connected to the mixing chamber 10 through multiple flow holes 13, which are distributed along the length of the flushing chamber 12, so that the flushing media can enter the mixing chamber 10 more evenly; the mixing chamber 10 and the discharge chamber 17 are connected through a release port 14, and a one-way valve is provided at the release port 14; the one-way valve is used to allow the media to flow from the mixing chamber 10 to the discharge chamber 17, while preventing the media in the discharge chamber 17 from flowing back to the mixing chamber 10; the discharge chamber 17 is used to collect the flushing media discharged through the release port 14, and the discharge chamber 17 is provided with a discharge outlet 18 for discharging the flushing media and its entrained impurities from the spray gun body 1; When it is necessary to clean the mixing chamber 10 and the mixing core 15, the operator stops normal spraying and introduces gas and liquid flushing medium into the spray gun body 1 through the backflushing port 11. At this time, the adjustment mechanism can be operated or configured to move the mixing core 15 to the cleaning position. The cleaning position is the position where the mixing core 15 moves axially relative to the mixing chamber 10, causing the flow gap between the mixing core 15 and the mixing chamber 10 to increase. In the cleaning position, the flushing medium enters the flushing chamber 12 through the backflushing port 11 and enters the mixing chamber 10 through the flow hole 13, flushing the baffle 16 of the mixing core 15 and the inner wall of the mixing chamber 10. Due to the increased gap between the mixing core 15 and the mixing chamber 10, the backflushing resistance decreases, the flushing medium flow rate increases, and the cleaning effect is enhanced. The flushed medium enters the discharge chamber 17 through the release port 14 under the action of the one-way valve and is finally discharged from the discharge port 18, thus completing the backflushing process.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0027] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mixture spray gun, comprising a spray gun body (1), a trigger (2), a nozzle (3), and at least two feed pipes (4) communicating with the spray gun body (1), characterized in that: The spray gun body (1) is provided with a mixing chamber (10), which is connected to the nozzle (3); The mixing chamber (10) is provided with a mixing core (15), and the mixing core (15) is provided with a baffle plate (16) on its outer periphery for turbulent mixing of the material entering the mixing chamber (10); the spray gun body (1) is provided with an adjustment mechanism for adjusting the axial position of the mixing core (15) in the mixing chamber (10), the adjustment mechanism includes a mounting sleeve (5), an adjustment knob (6), an elastic element (7) and a moving rod (8), the adjustment knob (6) drives the moving rod (8) to move axially through the mounting sleeve (5), the moving rod (8) is connected to the mixing core (15) to drive the mixing core (15) to undergo axial displacement, and the elastic element (7) is used to apply a pre-tightening reset force to the moving rod (8) and the mixing core (15); The spray gun body (1) is also provided with a backflush port (11), a flushing chamber (12) and a discharge chamber (17). The flushing chamber (12) is connected to the mixing chamber (10) through a flow hole (13). The mixing chamber (10) is connected to the discharge chamber (17) through a release port (14). A one-way valve is provided at the release port (14) so ​​that the medium in the mixing chamber (10) can only flow in the direction from the mixing chamber (10) to the discharge chamber (17). The discharge chamber (17) is provided with a discharge port (18). Thus, during backwashing, the gas or liquid flushing medium enters the flushing chamber (12) through the backwash port (11) and enters the mixing chamber (10) through the flow hole (13) to flush the mixing chamber (10) and the mixing core (15). The flushed medium enters the discharge chamber (17) through the release port (14) and is discharged from the discharge port (18).

2. The mixture spray gun according to claim 1, characterized in that, The spoiler (16) is a spiral spoiler structure that extends axially along the mixing core (15).

3. The mixture spray gun according to claim 1, characterized in that, The adjustment knob (6) is connected to the mounting sleeve (5) by a threaded pair. When the adjustment knob (6) rotates, the rotational motion is converted into the axial displacement of the moving rod (8) through the threaded pair.

4. A mixture spray gun according to claim 1, characterized in that, The elastic element (7) is a compression spring, which is sleeved on the outside of the moving rod (8) and abuts against the mounting sleeve (5) and the spray gun body (1).

5. A mixture spray gun according to claim 1, characterized in that, The axial displacement of the mixing core (15) is used to change the flow gap between the mixing core (15) and the mixing chamber (10).

6. A mixture spray gun according to claim 1, characterized in that, The flow holes (13) are multiple holes, and the multiple flow holes (13) are distributed along the length direction of the flushing chamber (12) to increase the coverage of the flushing medium entering the mixing chamber (10).

7. A mixture spray gun according to claim 1, characterized in that, The one-way valve is used to prevent the medium in the discharge chamber (17) from flowing back into the mixing chamber (10).

8. A mixture spray gun according to claim 5, characterized in that, The adjustment mechanism is used to position the mixing core (15) in the cleaning position during backwashing. The cleaning position is the position where the mixing core (15) moves axially relative to the mixing chamber (10) to increase the flow gap between the mixing core (15) and the mixing chamber (10).

9. A mixture spray gun according to claim 1, characterized in that, The spray gun body (1) is provided with an air inlet valve (9), which is used to introduce gas into the spray gun body (1) to participate in the atomization of the nozzle (3), and the gas can be used as one of the flushing media for backwashing.

10. A mixture spray gun according to claim 1, characterized in that, The nozzle (3) is detachably connected to the spray gun body (1).

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