Atomizing spray gun head for structural shotcrete

Abstract

The present invention discloses an atomizing spray gun head for structural sprayed concrete. The atomizing spray gun head includes a gun body and a gun head; the gun body includes an inner tube and a first outer tube sleeved on the inner tube; a first airflow cavity is formed between the inner tube and the first outer tube, and a spiral opening of the first airflow cavity is constructed between the inner tube and the first outer tube in the portion facing the gun head; the first outer tube is constructed with at least one first high-pressure inlet connected to the first airflow cavity; the inlet of the gun head is connected to the inner tube; the outlet of the gun head is adjusted in size by an adjusting component. The airflow cavity and the spiral opening of the atomizing spray gun head for structural sprayed concrete of the present invention increase the contact between compressed air and concrete, and reduce the risk of concrete blockage; the adjusting component realizes the control of the atomized spraying of concrete.

Description

Technical Field

[0001] The invention relates to the technical field of atomizing nozzles, in particular to an atomizing spray gun head for structural shotcrete. Background Art

[0002] The atomizing spray gun head for structural shotcrete is a specialized piece of equipment used in shotcrete construction. Its function is to atomize concrete to improve the density, strength, and durability of the concrete sprayed onto the target surface.

[0003] Existing atomizing guns for structural shotcrete primarily achieve atomization by mixing compressed air with concrete. However, during this mixing process, the compressed air enters the gun through one or more air holes due to the limited internal space, making contact with the concrete at points, which can lead to inadequate mixing. Furthermore, if the concrete flow rate is too high or the compressed air pressure is insufficient, the concrete can easily clog the air holes. Furthermore, the spray range and velocity of the atomizing gun are difficult to control. Summary of the Invention

[0004] In view of this, the present invention discloses an atomizing spray gun head for structural shotcrete.

[0005] The atomizing spray gun head comprises a gun body and a gun head;

[0006] The gun body includes an inner tube and a first outer tube sleeved on the inner tube;

[0007] A closed first airflow cavity is formed between the inner tube and the first outer tube, and a spiral opening of the first airflow cavity is constructed between the inner tube and the first outer tube at a portion facing the gun head;

[0008] The first outer tube is configured with at least one first high-pressure inlet communicating with the first airflow cavity;

[0009] The inlet of the gun head is communicated with the inner tube;

[0010] The size of the outlet of the gun head is adjusted by an adjusting component.

[0011] In the present invention, the gun body includes a second outer tube sleeved on the first outer tube;

[0012] A closed second airflow cavity is formed between the second outer tube and the first outer tube;

[0013] A first high-pressure inlet is configured at a portion of the first outer tube away from the gun head, and the first high-pressure inlet is communicated with the second air flow cavity;

[0014] The second outer tube is configured with a second high-pressure inlet at a portion close to the gun head.

[0015] In the present invention, the first airflow cavity and / or the second airflow cavity are configured as convergent flow channels along the airflow direction.

[0016] In the present invention, the second outer tube is detachably connected to the inlet of the gun head.

[0017] In the present invention, the first high-pressure inlet is configured as a turning flow channel.

[0018] In the present invention, the inlet of the gun head is connected to the first outer tube or the second outer tube in a threaded manner.

[0019] In the present invention, the first outer tube forms a mixing cavity in front of the outlet of the inner tube;

[0020] The inlet of the gun head is communicated with the mixing cavity.

[0021] In the present invention, the adjustment assembly includes a plurality of V-shaped plates and a driving member;

[0022] All the V-shaped pieces circumferentially surround the outlet of the gun head, and the V-shaped pieces are arranged along the length direction of the gun head;

[0023] All of the V-shaped plates are arranged in an overlapping manner in a clockwise or counterclockwise direction;

[0024] The V-shaped piece is rotatably connected to the gun head;

[0025] The driving member controls at least one of the V-shaped plates to actively rotate relative to the gun head.

[0026] In the present invention, at least one of the V-shaped pieces is constructed with a control ball head at a portion close to the gun head;

[0027] The driving member controls the control ball head to rotate along the rotation direction of the V-shaped piece.

[0028] In the present invention, the driving member is configured as a driving ring;

[0029] The driving ring rotates coaxially relative to the gun head;

[0030] The drive ring is configured with at least one drive groove for accommodating the control ball head;

[0031] The driving groove is inclined relative to the rotation direction of the driving ring within a control range.

[0032] Compared with the prior art, the atomizing spray gun head for structural shotcrete of the present invention has

[0033] 1. The first airflow cavity and the second airflow cavity form a buffer space. The buffer space prevents the concrete from directly flowing back into the gas generating equipment when the compressed air flow is reduced, the concrete pumping rate is increased, or the gun head outlet is blocked, causing equipment damage or difficulty in cleaning.

[0034] 2. When concrete flows back into the buffer space and accumulates, the cross-sectional diameter of the concrete accumulation area in the buffer space decreases, and the compressed air forms a pressure difference at the concrete accumulation area. The air pressure difference can naturally clear the concrete accumulation, further avoiding the blockage of concrete in the buffer space.

[0035] 3. Both the first and second airflow cavities are annular cavities, and the buffer space is an annular space. The annular space prevents the annular cavity from being completely blocked by concrete when the atomizing spray gun head is tilted upward or downward. Specifically, when the atomizing spray gun head is tilted, concrete will only accumulate at the bottom of the annular space under the action of gravity, and will not easily accumulate and completely block the annular space.

[0036] 4. The adjustment component adjusts the nozzle outlet diameter to achieve control of the rate and / or area of ​​concrete atomization spray. The buffer space ensures that the adjustment component can adjust the nozzle outlet diameter to a larger size without causing concrete to flow back into the gas generating equipment.

[0037] 5. The inner tube and the first outer tube form a spiral opening, which allows for more complete contact between the compressed air and the concrete. The buffer space ensures that the design of the spiral opening does not need to consider the risk of concrete clogging, but only needs to consider maximizing the mixing of the compressed air and concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic structural diagram of an atomizing spray gun head for structural shotcrete of the present invention;

[0040] Figure 2 It is a cross-sectional schematic diagram of the gun body of the present invention;

[0041] Figure 3 Schematic diagram of the structure of the liner pipe of the present invention;

[0042] Figure 4 It is a structural schematic diagram of the gun body of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the regulating assembly of the present invention;

[0044] Figure 6 It is a structural schematic diagram of the V-shaped member of the present invention;

[0045] Figure 7 The figure is a cross-sectional schematic diagram of an atomizing spray gun head for structural shotcrete of the present invention.

[0046] Figure markings: 100, gun body; 101, first air flow cavity; 102, second air flow cavity; 110, inner tube; 111, first high-pressure inlet; 112, second high-pressure inlet; 120, first outer tube; 130, second outer tube; 131, spiral mouth; 1311, spiral blade; 200, gun head; 210, gun barrel; 211, flange; 212, slot; 220, V-shaped piece; 221, right wing piece; 222, left wing piece; 223, control ball head; 230, drive ring; 231, drive groove; 240, auxiliary ring; 300, inner liner; 310, diverter structure; 311, diverter cylinder; 3111, diverter protrusion; 312, diverter connecting support. DETAILED DESCRIPTION

[0047] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings illustrate embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of disclosing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0049] As used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include", "comprising", "having", etc. specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0050] The present invention discloses an atomizing spray gun head for structural shotcrete, which can mix concrete with compressed air and spray the mixture in an atomized form. The atomizing spray gun head for structural shotcrete improves the mixing effect of concrete and compressed air through its internal structure, reduces the risk of concrete clogging high-pressure air holes, and optimizes the control of the rate and / or area of ​​concrete atomization spraying.

[0051] In this regard, Figure 1 The atomizing spray gun head for structural shotcrete comprises a gun body 100 and a gun head 200 .

[0052] The proximal end of the gun body 100 is detachably connected to the pump pipe of the concrete equipment, while the distal end of the gun body 100 is detachably connected to the gun head 200. The peripheral side of the gun body 100 is connected to the outlet hose of the high-pressure gas generator through air holes. Therefore, in the present invention, the gun body 100 is used to connect the structural concrete and high-pressure air respectively. The structural concrete and high-pressure air are first mixed within the gun body 100 and then atomized and sprayed through the gun head 200.

[0053] Furthermore, the gun head 200 is equipped with an adjustment assembly. This adjustment assembly allows the user to control the caliber of the gun head 200's nozzle in real time, for example, changing the nozzle diameter from a small size to a large size. Therefore, the gun head 200 of the present invention, through the control of the adjustment assembly, achieves control over the area and rate of spraying atomized concrete.

[0054] Further, Figure 2 The gun body 100 of the present invention includes an inner tube 110, a first outer tube 120 and a second outer tube 130. The first outer tube 120 is sleeved on the inner tube 110, and the second outer tube 130 is sleeved on the first outer tube 120.

[0055] The distal end of the inner tube 110 and the first outer tube 120 enclose a closed first airflow cavity 101. A spiral opening 131 is formed between the inner tube 110 and the first outer tube 120 at the distal end facing the gun head 200, communicating with the first airflow cavity 101. The spiral opening 131 is composed of a plurality of inclined spiral blades 1311. The two ends of each spiral blade 1311 are respectively connected to the outer wall of the inner tube 110 and the inner wall of the first outer tube 120. A spiral flow channel is formed between two adjacent spiral blades 1311, and the outlet of the spiral flow channel is arranged at the outlet of the inner tube 110 and in front of it.

[0056] Preferably, the outlet of each spiral flow channel faces the tangential direction of the first outer tube 120 .

[0057] Furthermore, a closed second airflow cavity 102 is formed between the second outer tube 130 and the first outer tube 120. The first outer tube 120 is configured with a first high-pressure inlet 111 at the distal end away from the gun head 200. The second outer tube 130 is configured with a second high-pressure inlet 112 at the proximal end close to the gun head 200. The second high-pressure inlet 112 is connected to the gas outlet of the external high-pressure gas generating device via a gas hose. Therefore, the second high-pressure inlet 112, the second airflow cavity 102, the first high-pressure inlet 111, the first airflow cavity 101 and the spiral port 131 are combined to form a gas flow channel. The gas flow channel can introduce high-pressure gas and transmit it to the outlet of the inner tube 110 and the front thereof, so that the concrete is mixed with the high-pressure gas.

[0058] Preferably, the first high-pressure inlet 111 is configured as a curved flow channel to reduce velocity loss of the compressed gas when passing through the first high-pressure inlet 111 .

[0059] In addition, the first airflow cavity 101 can be set as a convergent flow channel, that is, by setting the inner wall thickness of the first outer tube 120, the cross-sectional diameter of the first outer tube 120 along the gas flow direction is gradually reduced to reduce the volume potential energy between the gases and increase the kinetic energy of the gas flow rate.

[0060] Alternatively, the second airflow cavity 102 in the present invention may also be configured as a convergent flow channel.

[0061] Alternatively, the first airflow cavity 101 and the second airflow cavity 102 may both be configured as convergent flow channels.

[0062] Further, Figure 3 The gun body 100 is shown to include an inner liner tube 300. The inner liner tube 300 is removably connected to the inner tube 110. The proximal end of the inner liner tube 300 is connected to an external concrete generator via a threaded or clamped connection, while the distal end extends beyond or nearly extends beyond the distal end of the inner tube 110. Thus, the structural concrete generated by the concrete generator in the present invention passes through the inner liner tube 300 and is mixed with high-pressure air. The inner liner tube 300 can be removed and replaced immediately after use, preventing concrete residue from remaining within the spray gun.

[0063] Preferably, the detachable connection method between the inner liner tube 300 and the inner tube 110 can be a threaded connection, or the inner liner tube 300 can be made of an elastic material, and the proximal part of the inner liner tube 300 is provided with an elastic step surface 301 that abuts the proximal part of the inner tube 110 along the length direction.

[0064] In addition, the distal portion of the inner tube 110 is constructed with a diversion structure 310. The diversion structure 310 includes a diversion cylinder 311 deployed at the distal center of the inner liner 300. The diversion cylinder 311 is fixedly connected to the inner wall of the inner liner 300 through four diversion connection supports 312 distributed in the circumferential direction. A diversion channel connected to the inner tube 110 is formed between any two adjacent diversion connection supports 312. The proximal portion of the diversion cylinder 311 is constructed with a diversion protrusion 3111 protruding along the length direction. Therefore, the diversion structure 310 in the present invention performs appropriate extrusion and diversion cutting processing on the concrete that is about to pass through the inner liner 300, which is beneficial to increase the contact area between the concrete and the compressed air and improve the mixing efficiency.

[0065] Further, Figure 4 The gun head 200 is shown to include a barrel 210. The proximal end of the barrel 210 is constructed with a flange 211 extending perpendicular to the axis. The distal end of the second outer tube 130 is secured to the distal portion of the first and second outer tubes 120, 130, via a plurality of fasteners arranged evenly around the circumference. Once the flange 211 is secured, the proximal end of the barrel 210 covers the distal end of the first outer tube 120, reducing any gap between the first and second outer tubes 120. A mixing cavity is formed between the portion of the first outer tube 120 extending in the longitudinal direction, in front of the outlet of the inner tube 110, and the barrel 210. Therefore, in the present invention, concrete and high-pressure air are thoroughly mixed within the mixing cavity before being ejected.

[0066] as well as, Figure 5 The adjustment assembly is shown to include a plurality of V-shaped plates 220 and a drive ring 230 .

[0067] Each V-shaped piece 220 is arranged along the length of the gun head 200, and all V-shaped pieces 220 circumferentially surround the outer wall of the barrel 210 near its distal outlet. All V-shaped pieces 220 are in a rotational relationship with the barrel 210 at their ends proximal to the barrel 210, and together form the nozzle of the gun head 200 at their ends distal to the barrel 210. All V-shaped pieces 220 are arranged in an overlapping clockwise arrangement. The drive ring 230 controls the rotation of at least one V-shaped piece 220 relative to the barrel 210. Therefore, when the drive ring 230 rotates any V-shaped piece 220 relative to the barrel 210, all V-shaped pieces 220 rotate synchronously relative to the barrel 210. This synchronous rotation of all V-shaped pieces 220 changes the caliber of the nozzle of the gun head 200, thereby enabling the adjustment assembly to control the caliber of the nozzle of the gun head 200.

[0068] as well as, Figure 6The V-shaped pieces 220 are shown as being constructed with two fins, a left fin 222 and a right fin 221, at a predetermined angle to each other. All V-shaped pieces 220 are arranged in an overlapping clockwise pattern. Specifically, for all V-shaped pieces 220 arranged clockwise, the right fin 221 of the leading V-shaped piece 220 is always pressed against the trailing left fin 222. Furthermore, some V-shaped pieces 220 are constructed with protruding control knobs 223 near the barrel 210. Thus, the overlapping arrangement of the V-shaped pieces 220 allows for adjustment of the nozzle caliber of the barrel 210 while also ensuring that adjacent V-shaped pieces 220 do not separate.

[0069] Recombination Figure 4 and Figure 6 The barrel 210 has a plurality of annular retaining grooves 212 formed on its outer wall. A drive ring 230 is embedded within the retaining grooves 212 of the barrel 210 and is coaxially rotatable relative to the barrel 210. The drive ring 230 defines a plurality of drive slots 231, each of which accommodates a respective control ball 223. The drive slots 231 are inclined relative to the rotational plane of the drive ring 230 within a control range. This ensures that when the drive ring 230 coaxially rotates relative to the barrel 210, the drive slots 231 always accommodate each control ball 223. The control ball 223 drives the corresponding V-shaped piece 220 to rotate relative to the barrel 210.

[0070] also, Figure 7 The driving ring 230 is coaxially connected to an auxiliary ring 240 having a larger diameter, and the auxiliary ring 240 is fixedly connected to the driving ring 230 by means of bolts. Therefore, the user can control the adjustment assembly by operating the auxiliary ring 240.

[0071] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware. Of course, it can also be implemented through hardware, but in many cases the former is a better implementation method.

[0072] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An atomizing spray gun head for structural shotcrete, characterized in that: The atomizing spray gun head comprises a gun body and a gun head; The gun body includes an inner tube, a first outer tube sleeved on the inner tube, and a second outer tube sleeved on the first outer tube; A first airflow cavity is formed between the inner tube and the first outer tube, and a spiral opening of the first airflow cavity is constructed between the inner tube and the first outer tube at a portion facing the gun head; The first outer tube is configured with at least one first high-pressure inlet communicating with the first airflow cavity, and the first high-pressure inlet is configured as a turning flow channel; A second airflow cavity is formed between the second outer tube and the first outer tube; A first high-pressure inlet is configured at a portion of the first outer tube away from the gun head, and the first high-pressure inlet is communicated with the second air flow cavity; The second outer tube is configured with a second high-pressure inlet at a portion close to the gun head; The inlet of the gun head is communicated with the inner tube; The outlet of the gun head is sized by an adjusting assembly; The first airflow cavity and / or the second airflow cavity are configured as convergent flow channels along the airflow direction; The first outer tube forms a mixing cavity in front of the outlet of the inner tube; The inlet of the gun head is communicated with the mixing cavity; The gun body includes an inner liner tube, which is removably connected to the inner tube; and The distal end of the inner tube is configured with a diversion structure, which includes a diversion cylinder disposed at the center of the distal end of the inner liner tube. The diversion cylinder is fixedly connected to the inner wall of the inner liner tube through four circumferentially evenly distributed diversion connection supports. A diversion channel communicating with the inner tube is formed between any two adjacent diversion connection supports. The proximal end of the diversion cylinder is configured with a diversion protrusion protruding along the length direction. The second high-pressure inlet is connected to the gas outlet of the external high-pressure gas generating device through a gas hose. The second high-pressure inlet, the second airflow cavity, the first high-pressure inlet, the first airflow cavity and the spiral port are combined to form a gas flow channel.

2. The atomizing spray gun head for structural shotcrete according to claim 1, characterized in that: The second outer tube is detachably connected to the inlet of the gun head.

3. The atomizing spray gun head for structural shotcrete according to claim 1, characterized in that: The inlet of the gun head is connected to the first outer tube or the second outer tube in a threaded manner.

4. The atomizing spray gun head for structural shotcrete according to claim 1, characterized in that: The adjustment assembly includes a plurality of V-shaped plates and a driving member; All the V-shaped pieces circumferentially surround the outlet of the gun head, and the V-shaped pieces are arranged along the length direction of the gun head; All of the V-shaped plates are arranged in an overlapping manner in a clockwise or counterclockwise direction; The V-shaped piece is rotatably connected to the gun head; The driving member controls at least one of the V-shaped plates to actively rotate relative to the gun head.

5. The atomizing spray gun head for structural shotcrete according to claim 4, characterized in that: At least one of the V-shaped pieces is configured with a control ball head at a portion close to the gun head; The driving member controls the control ball head to rotate along the rotation direction of the V-shaped piece.

6. The atomizing spray gun head for structural shotcrete according to claim 5, characterized in that: The driving member is configured as a driving ring; The driving ring rotates coaxially relative to the gun head; The drive ring is configured with at least one drive groove for accommodating the control ball head; The driving groove is inclined relative to the rotation direction of the driving ring within a control range.

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