Feeding spray gun

Abstract

The utility model relates to the technical field of feeding tools, in particular to a feeding spray gun which comprises a gun body and a gun head shell, the gun body comprises an outer pipe and an inner pipe installed in the outer pipe, one end of the inner pipe is a discharging end, extends out of the outer pipe and is located in the gun head shell, and the other end of the inner pipe is a feeding end; a gas cavity is formed between the inner pipe and the outer pipe, a flowing cavity is formed between the inner pipe and the gun head shell, an air inlet is formed in the end, away from the gun head shell, of the outer pipe, and an air outlet is formed in the end, close to the gun head shell, of the outer pipe and communicates with the flowing cavity. The inner pipe is provided with a rotational flow part, the rotational flow part divides the flowing cavity into an inflow cavity and an outflow cavity, and the rotational flow part is provided with a plurality of penetrating parts communicating with the inflow cavity and the outflow cavity. Materials are atomized and diffused at the outlet of the spray head shell under the action of atomized gas, and are not atomized at any position in the gun body, so that the situation that the materials are atomized in the gun head and crystallized to block a pipeline of the gun body is avoided, and the feeding success rate of the spray gun is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of feeding tool, more particularly to a feeding spray gun. BACKGROUND

[0002] The success of the heavy component feeding of the hexachloroethane section incinerator system will directly affect the normal operation of the device, and if the heavy component cannot be normally transported to the incinerator for incineration treatment, the high-boiling substance pretreatment system will face the problem of high liquid level of the heavy component storage tank and storage failure. When the heavy component storage tank has a high liquid level and the heavy component cannot be normally transported to the incinerator for incineration treatment, only barrel packaging can be used for external discharge, which increases the treatment cost and does not meet the economic benefits of the operation of the device.

[0003] The main factor of the failure of the heavy component feeding of the hexachloroethane section incineration system is that the spray gun used for feeding the heavy component is blocked at the spray head, resulting in low feeding efficiency. The main factor of the blockage at the spray head is that when the atomizing gas in the atomizing chamber of the existing spray gun has a pressure higher than that of the material, an air blockage phenomenon occurs in the atomizing chamber of the waste liquid spray gun, resulting in crystallization of the heavy component in the atomizing chamber and blockage of the spray gun and the feeding pipeline. SUMMARY

[0004] The utility model aims at overcoming the problem of easy blockage of the spray gun during feeding of the heavy component in the prior art, and provides a feeding spray gun which can avoid crystallization of the heavy component and blockage of the spray gun.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A feeding spray gun is provided, which comprises a gun body and a gun head shell mounted at one end of the gun body, the gun body comprises an outer pipe and an inner pipe mounted in the outer pipe, one end of the inner pipe is a discharge end and extends out of the outer pipe and into the gun head shell, the other end of the inner pipe is a feeding end and penetrates through the outer pipe away from the one end of the gun head shell and is used for communicating with a material pipe; a gas cavity is formed between the inner pipe and the outer pipe, a flow cavity is formed between the inner pipe and the gun head shell, an air inlet is arranged at the one end of the outer pipe away from the gun head shell, an air outlet is arranged at the one end of the outer pipe close to the gun head shell, and the air outlet communicates with the flow cavity; a spiral flow part is arranged on the outer surface of the part of the inner pipe located in the flow cavity, the outer surface of the spiral flow part is attached to the inner surface of the gun head shell, the spiral flow part divides the flow cavity into an inflow cavity and an outflow cavity, a plurality of penetrating parts communicating the inflow cavity and the outflow cavity are arranged on the spiral flow part, and the axis of the penetrating part intersects the axis of the inner pipe.

[0007] In the above technical solution, the material pipe is connected to the feed end of the inner tube, and the atomizing gas supply pipe is connected to the air inlet. After the material enters the inner tube, it flows along the inner tube until it is ejected from the discharge port at the discharge end. At the same time, after the atomizing gas enters the gas chamber from the air inlet, it flows from the gas chamber through the air outlet to the inflow chamber in the flow chamber, and then passes through the through-portion to enter the outflow chamber. Since the axis of the through-portion intersects with the axis of the inner tube, the intersection mentioned here refers to the intersection in space. Since the axis of the inner tube and the axis of the through-portion are not in the same plane, the projections of the two are in intersection when they are in the same plane. The flow direction of the atomizing gas in the flow chamber was originally along the axial direction of the inner tube, so when the atomizing gas enters the through-portion, it will flow along the through-portion, and the axis of the through-portion intersects with the axis, causing the atomizing gas to rotate under the action of the through-portion, forming a rotating airflow in the outflow chamber and flowing out of the outflow chamber. As the material is ejected from the inner tube, a rotating airflow is also ejected from the outflow chamber. This rotating airflow cuts and atomizes the material, ultimately atomizing and dispersing the material ejected from the inner tube outlet, completing the feeding process. Since the material does not need to be mixed and atomized with the atomizing gas within the gun body, the need for an atomization chamber within the gun body is eliminated, and the material will not crystallize within the gun body.

[0008] Furthermore, the outer wall of the inner tube located in the inflow chamber is provided with a plurality of through holes. The through holes allow a small amount of atomized gas to enter the inner tube, thereby dividing the material in the inner tube and increasing the atomized gas content in the material. When the rotating airflow flowing out of the fluid chamber rotates and cuts the material containing the atomized gas, the atomization effect of the material is improved.

[0009] Furthermore, at least two through-holes are provided, and the axes of each through-hole are located in different planes. Located in different planes means that the axes of the through-holes are perpendicular to the axis of the inner tube, but the axes of the through-holes do not run parallel or intersect in the same plane. Atomized gas enters the inner tube through different through-holes, which not only achieves gas-liquid mixing but also prevents concentrated atomized gas from entering the inner tube, causing atomization of the material within the inner tube and resulting in crystallization.

[0010] Furthermore, the outlet of the inner tube is provided with a flared portion, which is tapered. The inner diameter of the flared portion increases toward the end of the outlet, allowing the material to diffuse along the flared portion and be ejected in a better diffused shape.

[0011] Furthermore, the angle between the inner surface of the flared portion and the axis of the inner tube is 15-25 degrees.

[0012] Furthermore, the plurality of penetration portions are provided and are equidistantly distributed around the circumference. The equidistant distribution of the plurality of penetration portions can allow the atomized gas to form a swirl flow and flow out better.

[0013] Furthermore, the inner tube includes a first tube body portion and a second tube body portion, wherein the first tube body portion is located within the outer tube, and the second tube body portion is located within the gun head housing, and the first tube body portion and the second tube body portion are detachably connected. The inner tube can be separated into the first tube body portion and the second tube body portion, which further facilitates the processing of the inner tube and the outer tube.

[0014] Furthermore, the second tube portion is provided with a first cavity, a second cavity, a third cavity and a discharge cavity in sequence from the end connected to the first tube portion to the discharge end. The inner diameter of the first cavity is larger than the inner diameter of the second cavity, the minimum inner diameter of the third cavity is larger than the inner diameter of the second cavity, and the inner diameter of the discharge cavity is consistent with the maximum inner diameter of the third cavity. The inner diameter of the third cavity decreases as it approaches the second cavity. The through holes connect the third cavity and the inflow cavity. When the material flows from the first tube portion into the second tube portion, it first enters the first cavity of the second tube portion and then enters the second cavity from the first cavity. Since the inner diameter of the second cavity is smaller than that of the first cavity, the flow rate of the material in the second cavity will increase. When the material flows from the second cavity into the third cavity, the inner diameter of the third cavity increases, resulting in a slowdown in the flow rate of the material. At this time, the atomizing gas enters the third cavity through the through hole and can be mixed with the material with a slowed flow rate and mixed more evenly. The gas-liquid mixed material enters the discharge cavity and is ejected from the discharge port.

[0015] Furthermore, the outer surface of the second tube body is threadedly connected to the inner surface of the first tube body.

[0016] Furthermore, the gun head housing includes a cylindrical portion and a tapered portion, the swirl portion being located within the cylindrical portion at the junction of the cylindrical and tapered portions; the outflow cavity being formed between the tapered portion and the first tubular body. The outflow cavity formed by the tapered portion and the first tubular body has a smaller gas flow area, which can accelerate the flow rate of the atomizing gas, allowing the rapidly flowing, swirling airflow to better atomize and diffuse the material.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the material is ejected from the discharge port of the inner tube, and the atomizing gas is ejected from the outflow cavity between the inner tube and the nozzle shell. The material is atomized and diffused at the outlet of the nozzle shell under the action of the atomizing gas, and atomization will not occur at any point in the gun body, thereby avoiding the atomization of the material in the gun head, which causes the material to crystallize and block the pipeline of the gun body, thereby improving the success rate of feeding the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the prior art of the pressing roller mechanism;

[0019] Figure 2 This is a schematic diagram of the internal structure of a feeding spray gun;

[0020] Figure 3 This is a structural schematic diagram of the second tube body of a feeding spray gun.

[0021] In the accompanying drawings: 100, gun body; 110, outer tube; 120, inner tube; 121, swirl part; 122, penetration part; 123, through hole; 124, flared part; 125, first tube body part; 126, second tube body part; 1261, first cavity; 1262, second cavity; 1263, third cavity; 1264, discharge cavity; 200, gun head shell; 210, cylindrical part; 220, conical part; 300, gas cavity; 400, flow cavity; 410, inflow cavity; 420, outflow cavity; 500, atomization chamber. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0023] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Example 1

[0025] This embodiment is a first embodiment of a feeding spray gun. Figures 2-3As shown, it includes a gun body 100 and a gun head shell 200 installed at one end of the gun body 100, the gun body 100 includes an outer tube 110 and an inner tube 120 installed in the outer tube 110, one end of the inner tube 120 is a discharge end and extends to the outside of the outer tube 110 and is located in the gun head shell 200, the other end of the inner tube 120 is a feed end and passes through the end of the outer tube 110 away from the gun head shell 200 and is used to communicate with the material pipe; a gas chamber 300 is formed between the inner tube 120 and the outer tube 110, a flow chamber 400 is formed between the inner tube 120 and the gun head shell 200, and the outer tube 110 is away from the gun head. An air inlet is provided at one end of the shell 200, and an air outlet is provided at one end of the outer tube 110 close to the gun head shell 200, and the air outlet is connected to the flow chamber 400; the outer surface of the inner tube 120 located in the flow chamber 400 is provided with a swirl portion 121, and the outer surface of the swirl portion 121 is in contact with the inner surface of the gun head shell 200, and the swirl portion 121 divides the flow chamber 400 into an inflow chamber 410 and an outflow chamber 420. The swirl portion 121 is provided with several through portions 122 connecting the inflow chamber 410 and the outflow chamber 420, and the axis of the through portion 122 intersects with the axis of the inner tube 120.

[0026] In this embodiment, the inner tube 120 includes a first tubular body portion 125 and a second tubular body portion 126. The first tubular body portion 125 is located inside the outer tube 110, and the second tubular body portion 126 is located inside the gun head housing 200. The first tubular body portion 125 and the second tubular body portion 126 are detachably connected. The inner tube 120 can be split into the first tubular body portion 125 and the second tubular body portion 126, which makes it easier to process the inner tube 120 and the outer tube 110. The outer surface of the second tubular body portion 126 is threadedly connected to the inner surface of the first tubular body portion 125.

[0027] Specifically, the outer wall of the portion of the inner tube 120 located in the inflow cavity 410 is provided with a plurality of through holes 123, that is, the outer wall of the second tube body is provided with a plurality of through holes 123. In this embodiment, there are at least two through holes 123, and the axes of each through hole 123 are located in different planes. The through holes 123 can allow a small portion of the atomized gas to enter the inner tube 120, divide the material in the inner tube 120, increase the atomized gas content in the material, and when the rotating airflow flowing out of the fluid cavity rotates and cuts the material with the atomized gas, the atomization effect of the material is better. Located in different planes means that the axes of the through holes 123 are all perpendicular to the axis of the inner tube 120, but the axes of the through holes 123 are not parallel or intersecting in the same plane. The atomized gas enters the inner tube 120 along different through holes 123, which can achieve the purpose of gas-liquid mixing and can also prevent the atomized gas from entering the inner tube 120 in a concentrated manner, causing atomization and crystallization of the material in the inner tube 120.

[0028] In this embodiment, the second tube body portion 126 is provided with a first cavity 1261, a second cavity 1262, a third cavity 1263 and a discharge cavity 1264 in sequence from one end connected to the first tube body portion 125 to the discharge end. The inner diameter of the first cavity 1261 is larger than the inner diameter of the second cavity 1262, the minimum inner diameter of the third cavity 1263 is larger than the inner diameter of the second cavity 1262, and the inner diameter of the discharge cavity 1264 is consistent with the maximum inner diameter of the third cavity 1263; the inner diameter of the third cavity 1263 is smaller as it is closer to the second cavity 1262; the through holes 123 are connected to the third cavity 1263 and the inflow cavity 410. The material flows from the first tube portion 125 into the second tube portion 126, first entering the first cavity 1261 of the second tube portion 126, and then from the first cavity 1261 into the second cavity 1262. Because the inner diameter of the second cavity 1262 is smaller than that of the first cavity 1261, the flow rate of the material in the second cavity 1262 increases. When the material flows from the second cavity 1262 into the third cavity 1263, the inner diameter of the third cavity 1263 increases, causing the flow rate of the material to slow down. At this time, the atomized gas enters the third cavity 1263 through the through hole 123, just enough to mix with the material with a slower flow rate, and the mixing is relatively uniform. The gas-liquid mixed material enters the discharge cavity 1264 and is sprayed out from the discharge port.

[0029] In this embodiment, a plurality of through-holes 122 are provided and are evenly spaced around the circumference. The evenly spaced through-holes 122 can allow the atomized gas to form a swirl flow and flow out better.

[0030] The principle diagram of the feeding spray gun of the prior art is as follows Figure 1 As shown, the material in the inner tube 120 and the atomizing gas in the gas cavity 300 are mixed in the atomizing chamber 500, and the material is atomized in the atomizing chamber under the action of the atomizing gas and then sprayed out from the discharge port.

[0031] The working principle of the feeding spray gun of the embodiment is as follows: the material pipe is connected to the feeding end of the inner tube 120, and the atomizing gas supply pipe is connected to the gas inlet. After the material enters the inner tube 120, it flows along the inner tube 120 until it is sprayed out of the discharge port at the discharge end. At the same time, the atomizing gas enters the gas cavity 300 from the gas inlet, flows into the inflow cavity 410 in the flow cavity 400 from the gas cavity 300, and then enters the outflow cavity 420 through the through portion 122 and the third cavity 1263 through the through hole 123. Since the axis of the through portion 122 intersects the axis of the inner tube 120, the intersection here refers to the intersection in space. Since the axis of the inner tube 120 and the axis of the through portion 122 are not in the same plane, their projections in the same plane are intersected. The flow direction of the atomizing gas in the flow cavity 400 is originally along the axial direction of the inner tube 120, so when the atomizing gas enters the through portion 122, it changes to flow along the through portion 122. The axis of the through portion 122 intersects the axis, causing the atomizing gas to rotate under the action of the through portion 122 and form a rotating gas flow in the outflow cavity 420 and flow out of the outflow cavity 420. When the material is mixed with part of the atomizing gas in the third cavity 1263 and sprayed out of the inner tube 120 at the same time, the rotating gas flow is also sprayed out of the outflow cavity 420. The rotating gas flow will cut and atomize the material, and finally the material sprayed out of the discharge port of the inner tube 120 will be atomized and sprayed out in a diffused manner, thereby completing the feeding. Since the material does not need to be mixed and atomized with the atomizing gas in the gun body 100, the atomizing chamber in the gun body 100 can be avoided, and the material will not crystallize in the gun body 100.

[0032] The beneficial effects of the embodiment are as follows: the material is sprayed out of the discharge port of the inner tube 120, the atomizing gas is sprayed out of the outflow cavity 420 between the inner tube 120 and the spray head shell, and the material is atomized and diffused under the action of the atomizing gas at the outlet of the spray head shell. The material will not be atomized anywhere in the gun body 100, which avoids the crystallization of the material in the gun head, thereby improving the success rate of the feeding of the spray gun.

[0033] Embodiment two

[0034] The second embodiment of the feeding spray gun is similar to the first embodiment, except that, as shown in Figure 2 The discharge port of the inner tube 120 is provided with an expanding portion 124, which is conical. The inner diameter of the expanding portion 124 is larger at the end closer to the discharge port, which allows the material to diffuse along the expanding portion 124 and be sprayed out in a better diffused manner.

[0035] Further, the angle between the inner surface of the expanding portion 124 and the axis of the inner tube 120 is 15-25 degrees.

[0036] The remaining features and working principles of this embodiment are consistent with those of the above embodiment 1.

[0037] Example 3

[0038] This embodiment is the third embodiment of the feeding spray gun. This embodiment is similar to the first and second embodiments, except that Figure 2 As shown, the gun head housing 200 includes a cylindrical portion 210 and a tapered portion 220. The swirl portion 121 is located within the cylindrical portion 210 and at the junction of the cylindrical portion 210 and the tapered portion 220. An outflow cavity 420 is formed between the tapered portion 220 and the first tubular portion 125. The outflow cavity 420 formed by the tapered portion 220 and the first tubular portion 125 has a small gas flow area, which can accelerate the flow rate of the atomizing gas, allowing the fast-flowing, rotating airflow to better atomize and diffuse the material.

[0039] The remaining features and working principles of this embodiment are consistent with any of the above embodiments.

[0040] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A feeding spray gun, comprising a gun body (100) and a gun head shell (200) mounted on one end of the gun body (100), characterized in that: The gun body (100) includes an outer tube (110) and an inner tube (120) installed in the outer tube (110), one end of the inner tube (120) is a discharge end and extends to the outside of the outer tube (110) and is located in the gun head shell (200), and the other end of the inner tube (120) is a feed end and passes through the end of the outer tube (110) away from the gun head shell (200) and is used to communicate with the material pipe; a gas cavity (300) is formed between the inner tube (120) and the outer tube (110), and a flow cavity (400) is formed between the inner tube (120) and the gun head shell (200), and an air inlet is provided at the end of the outer tube (110) away from the gun head shell (200). The outer tube (110) is provided with an air outlet at one end close to the gun head shell (200), and the air outlet is connected to the flow chamber (400); the outer surface of the inner tube (120) located in the flow chamber (400) is provided with a swirl portion (121), the outer surface of the swirl portion (121) is in contact with the inner surface of the gun head shell (200), and the swirl portion (121) divides the flow chamber (400) into an inflow chamber (410) and an outflow chamber (420), and the swirl portion (121) is provided with a plurality of through portions (122) connecting the inflow chamber (410) and the outflow chamber (420), and the axis of the through portion (122) intersects with the axis of the inner tube (120).

2. The feeding spray gun according to claim 1, characterized in that: The outer wall of the portion of the inner tube (120) located in the inflow cavity (410) is provided with a plurality of through holes (123).

3. The feeding spray gun according to claim 2, characterized in that: At least two through holes (123) are provided, and the axis of each through hole (123) is located in a different plane.

4. The feeding spray gun according to claim 2, characterized in that: The inner tube (120) is provided with a flared portion (124) at the discharge port, and the flared portion (124) is tapered.

5. The feeding spray gun according to claim 2, characterized in that: The angle between the inner surface of the flared portion (124) and the axis of the inner tube (120) is 15-25 degrees.

6. The feeding spray gun according to claim 2, characterized in that: The through-portions (122) are provided in plurality and are distributed equidistantly around the circumference.

7. The feeding spray gun according to any one of claims 2 to 6, characterized in that: The inner tube (120) includes a first tube body portion (125) and a second tube body portion (126), wherein the first tube body portion (125) is located inside the outer tube (110), and the second tube body portion (126) is located inside the gun head shell (200), and the first tube body portion (125) and the second tube body portion (126) are detachably connected.

8. The feeding spray gun according to claim 7, characterized in that: The second tube body portion (126) is provided with a first cavity (1261), a second cavity (1262), a third cavity (1263) and a discharge cavity (1264) in sequence from one end connected to the first tube body portion (125) to the discharge end. The inner diameter of the first cavity (1261) is larger than the inner diameter of the second cavity (1262). The minimum inner diameter of the third cavity (1263) is larger than the inner diameter of the second cavity (1262). The inner diameter of the discharge cavity (1264) is consistent with the maximum inner diameter of the third cavity (1263). The closer the inner diameter of the third cavity (1263) is to the second cavity (1262), the smaller it is. The through holes (123) are connected to the third cavity (1263) and the inflow cavity (410).

9. The feeding spray gun according to claim 7, characterized in that: The outer surface of the second tube body portion (126) is threadedly connected to the inner surface of the first tube body portion (125).

10. The feeding spray gun according to claim 7, characterized in that: The gun head shell (200) includes a cylindrical portion (210) and a conical portion (220), the swirl portion (121) is located inside the cylindrical portion (210) and at the connection between the cylindrical portion (210) and the conical portion (220); the outflow cavity (420) is formed between the conical portion (220) and the first tubular body portion (125).

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