Nozzle Structure for Spraying Slurry and Spraying Equipment with Such Structure

Abstract

The present invention relates to a nozzle structure and a spraying device for spraying slurry. The nozzle structure includes: a slurry delivery pipe; a ventilation pipe disposed inside the slurry delivery pipe; a slurry spray head installed at the discharge port. The slurry spray head plugs the discharge port of the slurry delivery pipe, and a through hole corresponding to the air outlet of the ventilation pipe is provided in the middle. A plurality of slurry discharge grooves communicating with the discharge port are provided on the end face of the slurry spray head; a turbine installed in the ventilation pipe, and a part of the turbine extends out of the air outlet and the through hole. By introducing high-pressure gas into the ventilation pipe, the high-pressure gas passes through the turbine and is blown out from the gap between the turbine and the through hole to form a rotating air flow. The slurry flowing out from the slurry discharge grooves is broken up by the rotating air flow to form slurry particles, thereby completing the spraying of the slurry. When the present invention is used for slurry paving, slurry particles can be formed to constitute a road surface seal layer, the surface is uneven, has a high anti-slip coefficient, and can significantly improve the anti-slip performance of the road surface.

Description

Technical Field

[0001] The present invention relates to the field of road construction engineering, and particularly to a nozzle structure for spraying slurry and a spraying device having the structure. Background Art

[0002] There are two existing preventive maintenance technologies for road asphalt pavements. The first is to spread an emulsified asphalt slurry seal or a modified emulsified asphalt slurry seal (commonly known as "micro-surfacing") about 0.6 cm thick on the asphalt pavement using a slurry seal truck, adding stone chips with an aggregate particle size of 3 mm to 5 mm, and the binder being emulsified asphalt or modified emulsified asphalt and a small amount of cement. The second is to spray an asphalt regeneration reducing agent on the asphalt pavement using an emulsified asphalt spraying truck to supplement the light components in the road asphalt to increase the durability of the asphalt.

[0003] The above two methods have the following defects:

[0004] For the first method, when spreading an emulsified asphalt seal layer about 0.6 cm thick, after the emulsified asphalt demulsifies, the 3 mm to 5 mm stone chips in the slurry are exposed to form a new surface structure. Since the stone chips are suspended in the seal layer mixture and the strength of the stone chips is weak, the texture depth is extremely easy to decay under the action of vehicle load rolling and abrasion. In addition, the bonding strength of the binder is poor, and the stone chips are easy to fly and cause sand running, thus gradually losing the anti-slip performance of the road surface.

[0005] For the second method, when spraying the asphalt regeneration reducing agent, the light components in the asphalt are increased, improving the durability of the asphalt. However, this regeneration reducing agent is an oily material in which a special asphalt material and a softening agent are melted together. After spraying this regeneration reducing agent, the anti-slip performance of the road surface decays sharply. After this regeneration reducing agent penetrates into the asphalt pavement, the road surface can gradually recover to its original anti-slip ability. This method can only improve the anti-aging performance of the asphalt and has no help for the anti-slip performance of the road surface. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the prior art, and provide a nozzle structure for spraying slurry and a spraying device having the structure, so as to solve the problems of easy occurrence of sand running and peeling diseases in the existing road maintenance measures and gradually losing the anti-slip performance, as well as the problem of having no help for the anti-slip performance of the road surface.

[0007] The technical solution for achieving the above purpose is:

[0008] The present invention provides a nozzle structure for spraying slurry, which is characterized by including:

[0009] A slurry delivery pipe having an inlet and an outlet disposed opposite to each other, and a slurry passage communicating the inlet and the outlet is formed inside the slurry delivery pipe;

[0010] The air vent pipe disposed inside the slurry delivery pipe has an air inlet and an air outlet. The air outlet is located inside the discharge port. A gas passage communicating the air inlet and the air outlet is formed inside the air vent pipe.

[0011] The slurry nozzle installed at the discharge port plugs the discharge port, and a through hole corresponding to the air outlet is provided in the middle of the slurry nozzle. A plurality of slurry discharge slots communicating with the discharge port and the slurry passage are provided on the end face of the slurry nozzle; and

[0012] The turbine installed inside the air vent pipe has a part extending out of the air outlet and the through hole. By introducing high-pressure gas into the air vent pipe, the high-pressure gas passes through the turbine and blows out from the gap between the turbine and the through hole to form a rotating air flow. The slurry flowing out from the slurry discharge slot is broken up by the rotating air flow to form slurry particles, thereby completing the spraying of the slurry.

[0013] A conical structure is provided at the end of the turbine. A part of the conical structure extends out of the air outlet and the through hole. The size of the part of the conical structure extending out of the through hole is larger than the size of the part located inside the air vent pipe.

[0014] The slurry discharge slots are arranged in an inclined shape and are spaced around the through hole.

[0015] The nozzle structure for spraying slurry of the present invention can be used for the laying of road surface slurry. The nozzle structure forms a rotating air flow to break up the slurry and form slurry particles. These slurry particles fall on the road surface under the action of their own gravity to form a road surface seal layer. The hardness of the cured slurry particles depends on the material selection of the slurry, but its structural strength is much higher than that of stone chip aggregates. The road surface seal layer formed by arranging a plurality of slurry particles is uneven on the surface and has a high anti-slip coefficient, which can significantly improve the anti-slip performance of the road surface.

[0016] A further improvement of the nozzle structure for spraying slurry of the present invention is that a turbine valve core is connected to the turbine, and the turbine is installed on the air vent pipe through the turbine valve core.

[0017] A further improvement of the nozzle structure for spraying slurry of the present invention is that an installation channel separated from the slurry passage is provided inside the slurry delivery pipe, and the installation channel is arranged inside the slurry passage;

[0018] The air vent pipe is disposed inside the installation channel and is connected to the slurry delivery pipe.

[0019] The present invention also provides a spraying device having a nozzle structure, including:

[0020] A horizontally arranged slurry main pipe, having a main slurry inlet and a plurality of main slurry outlets;

[0021] A plurality of the aforementioned nozzle structures, the nozzle structures are arranged corresponding to the main slurry outlets, and the feed ports on the nozzle structures are connected to the corresponding main slurry outlets.

[0022] A further improvement of the spraying device with a nozzle structure according to the present invention lies in that it further includes a mounting base and a lifting mechanism mounted on the mounting base, the lifting mechanism can be adjusted in a lifting manner, the lifting mechanism is connected to the slurry main pipe, and by adjusting the lifting mechanism in a lifting manner, the setting height of the slurry main pipe can be adjusted.

[0023] A further improvement of the spraying device with a nozzle structure according to the present invention lies in that it further includes a mounting base and a moving adjustment mechanism mounted on the mounting base, the moving adjustment mechanism can move horizontally back and forth, the moving adjustment mechanism is connected to the slurry main pipe, and by moving the moving adjustment mechanism horizontally back and forth, the slurry main pipe can be driven to move horizontally back and forth together, so as to make the slurry spraying uniform.

[0024] A further improvement of the spraying device with a nozzle structure according to the present invention lies in that it further includes an air compressor connected to the air inlet of the ventilation pipe, high-pressure gas is introduced into the ventilation pipe through the air compressor, and the pressure of the introduced high-pressure gas can be adjusted.

[0025] A further improvement of the spraying device with a nozzle structure according to the present invention lies in that the slurry main pipe includes a plurality of pipe fitting units connected by splicing, and a main slurry inlet is provided on one of the pipe fitting units;

[0026] A main slurry outlet is provided on each pipe fitting unit;

[0027] The pipe fitting unit located at the end has a closed end cover. Description of the Drawings

[0028] Figure 1 It is a side view of the nozzle structure for spraying slurry according to the present invention.

[0029] Figure 2 It is Figure 1 The A-A cross-sectional view in

[0030] Figure 3 It is an exploded decomposition structure schematic diagram of the nozzle structure for spraying slurry according to the present invention.

[0031] Figure 4 It is a structure schematic diagram of the spraying device with a nozzle structure according to the present invention.

[0032] Figure 5Schematic diagram of the pipe fitting unit with a main slurry inlet in the spraying device with a nozzle structure according to the present invention.

[0033] Figure 6 Schematic diagram of the pipe fitting unit in the middle in the spraying device with a nozzle structure according to the present invention.

[0034] Figure 7 Schematic diagram of the pipe fitting unit at the end in the spraying device with a nozzle structure according to the present invention. Detailed implementation manners

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Refer to Figure 1 , the present invention provides a nozzle structure for spraying slurry and a spraying device with the nozzle structure, which are used to provide a new slurry paving method and aim to improve the anti-slip performance of the surface after slurry paving. The nozzle structure and the spraying device of the present invention can disperse the slurry to form slurry particles, and pave the slurry particles on the road surface to form a particle seal layer. Specifically, the nozzle structure and the spraying device of the present invention have a slurry channel and a gas channel. High-pressure gas is introduced into the gas channel, and the slurry for paving is introduced into the slurry channel. The slurry flows out from the slurry outlet groove through the slurry channel, and the flowing slurry is in a long strip shape. The high-pressure gas blows out through the gap between the turbine and the through hole to form a rotating air flow. The rotating air flow blows to the peripheral slurry fluid and disperses the slurry. Due to the agglomeration of the slurry and the action of the surface liquid tension, the dispersed slurry forms spherical slurry particles. Under the action of gravity and the blowing force of the gas, the slurry particles fly to the asphalt road surface, thus fully paving the asphalt road surface and further forming a particle seal layer. After curing, the slurry particles have high hardness and strong adhesion. The surface of the seal layer has granular protrusions, the texture depth reaches, and it has a high anti-slip coefficient. The spraying of the present invention provides a new slurry paving measure for the maintenance of asphalt roads by using the nozzle structure and the spraying device with the nozzle structure, and can improve the anti-slip performance of asphalt formworks. The nozzle structure for spraying slurry and the spraying device with the structure of the present invention will be described below with reference to the accompanying drawings.

[0037] Refer to Figure 1 , which shows a side view of the nozzle structure for spraying slurry according to the present invention. Refer to Figure 2 , which shows Figure 1 The A-A cross-sectional view in Figure 1 and Figure 2 , the nozzle structure for spraying slurry according to the present invention will be described.

[0038] As shown in Figure 1 and Figure 2As shown in the figure, the nozzle structure 21 for spraying slurry of the present invention includes a slurry delivery pipe 211, a ventilation pipe 212, a slurry nozzle 213 and a turbine 214. The slurry delivery pipe 211 has a feed port 2111 and a discharge port 2112 which are oppositely arranged. A slurry channel 2113 communicating the feed port 2111 and the discharge port 2112 is formed inside the slurry delivery pipe 211. The slurry delivery pipe 211 is connected to a slurry supply device through the feed port 2111, so that the slurry in the slurry supply device can enter the slurry channel 2113 from the feed port 2111. After passing through the slurry channel 2113, the slurry is delivered to the discharge port 2112, and then the slurry is output from the discharge port 2112. The ventilation pipe 212 is disposed inside the slurry delivery pipe 211. The ventilation pipe 212 has an air inlet 2121 and an air outlet 2122. The air outlet 2122 is located inside the discharge port 2112. Thus, when the slurry at the discharge port 2112 is output, the slurry surrounds the air outlet 2122, that is, the slurry surrounds the outer periphery of the ventilation pipe 212. A gas channel 2123 communicating the air inlet 2121 and the air outlet 2122 is formed inside the ventilation pipe 212. The ventilation pipe 212 is connected to an air compressor through the air inlet 2121. The high-pressure gas provided by the air compressor enters the gas channel 2123 through the air inlet 2121. The high-pressure gas passes through the gas channel 2123 and is sent to the air outlet 2122. Then the high-pressure gas is output from the air outlet 2122. Since the air outlet 2122 is disposed inside the discharge port 2112, the output high-pressure gas is inside the output slurry. The slurry nozzle 213 is installed at the discharge port 2112. As shown in Figure 3 the figure, the slurry nozzle 213 seals the discharge port 2112, and a through hole 2131 corresponding to the air outlet 2122 is provided in the middle of the slurry nozzle 213. A plurality of slurry discharge slots 2132 communicating with the discharge port 2112 and the slurry channel 2113 are provided on the end face of the slurry nozzle 213. Thus, the slurry output from the discharge port 2112 will flow out from the slurry discharge slots 2132 provided on the slurry nozzle 213 to form a slurry fluid. The slurry fluid is in a long strip shape, and the cross-sectional shape of the slurry fluid is consistent with the outer contour shape of the slurry discharge slots 2132. The turbine 214 is installed inside the ventilation pipe 212. A part of the turbine 214 extends out of the air outlet 2122 and the through hole 2131, that is, a part of the end of the turbine 214 extends out and is exposed from the air outlet 2112 and the through hole 2131. After high-pressure gas is introduced into the ventilation pipe 212, the high-pressure gas flows through the turbine 214 and is subjected to the vortex action of the turbine, and then blows out from the gap between the turbine 214 and the through hole 2131 to form a rotating air flow. The slurry flowing out from the slurry discharge slots 2132 is broken up by the rotating air flow to form slurry particles, thereby completing the spraying of the slurry.

[0039] The spiral blades provided on the turbine 214 guide and vortex the high-pressure gas, so that the high-pressure gas blown out from the gap between the turbine 214 and the through-hole 2131 can form a rotating air flow. This rotating air flow is located inside the slurry fluid flowing out of the slurry discharge slot 2132. The rotating air flow blows out from the gap, and can form an effect of rotating and spreading outwards. Thus, the rotating air flow blows onto the slurry fluid, dispersing the slurry fluid. Although the slurry for paving has fluidity, it also has a relatively high viscosity. The slurry has agglomeration property, and under the action of the surface liquid tension, the dispersed slurry forms spherical bodies of various sizes, that is, slurry particles. When paving the slurry, the slurry is dispersed into slurry particles through the nozzle structure. The slurry particles are affected by gravity and the blowing force of the gas, and fall onto the paving surface. If it is used for paving an asphalt road, the slurry particles fall on the surface of the asphalt road. These slurry particles are interlaced and overlapped to form a particle seal layer. After the slurry particles are cured, they have high hardness, strong adhesion, granular protrusions on the surface, large texture depth, and a relatively high anti-slip coefficient.

[0040] In a specific embodiment of the present invention, as Figure 2 and Figure 3 shown, a conical structure 2141 is provided at the end of the turbine 214. A part of the conical structure 2141 extends out of the air outlet 2122 and the through-hole 2131. The size of the part of the conical structure 2141 extending out of the through-hole 2131 is larger than the size of the part located inside the ventilation pipe 212. The conical surface of the provided conical structure 2141 serves as a guiding surface. The high-pressure air flow forms a rotating air flow through the turbine 214. The high-pressure rotating air flow will blow out from the gap between the conical surface of the conical structure 2141 and the through-hole 2131. Due to the guiding of the conical surface, the blown high-pressure air flow can form a pulsating air curtain that moves and spreads outwards to the periphery, enabling the high-pressure air flow to smoothly blow onto the slurry fluid and dispersing the slurry fluid.

[0041] Preferably, the size of the conical structure 2141 gradually increases from the end located inside the ventilation pipe 212 to the end located outside the through-hole 2131, and the conical structure 2141 is integrally in the shape of a frustum of a cone. The size of the end of the conical structure 2141 extending out of the through-hole 2131 is adapted to the size of the through-hole 2131.

[0042] More preferably, the through-hole 2131 is a circular hole, and the gap between the conical structure 2141 and the through-hole 2131 is in an arc shape, so that the high-pressure air flow blown out from this gap will be in a conical shape that gradually expands downwards.

[0043] Furthermore, as Figure 2As shown, a turbine valve core 2142 is connected to the turbine 214, and the turbine 214 is installed on the ventilation pipe 212 through the turbine valve core 2142. Specifically, the ventilation pipe 212 is vertically arranged, the turbine valve core 2142 is also vertically arranged, and the turbine valve core 2142 is placed inside the ventilation pipe 212, with a part of the top of the turbine valve core 2142 protruding from the top of the ventilation pipe 212.

[0044] Furthermore, in combination with Figure 3 As shown, the top of the conical structure 2141 is fixedly connected to the bottom of the turbine valve core 2142. A plurality of blades 2143 are fixedly arranged at intervals on the outer periphery of the conical structure 2141. The blades 2143 are arranged in a spiral shape, and a part of the blades 2143 is fixedly arranged on the turbine valve core 2142. The plurality of blades 2143 fixedly arranged on the conical structure 2141 and the turbine valve core 2142 constitute the turbine 214. When high-pressure gas flows through the surface of the blades 2143, the gas is subjected to the vortex action of the blades, generating a vortex to form a rotating air flow.

[0045] In a preferred embodiment, the turbine valve core 2142 is fixedly connected to the ventilation pipe 212 through a sealing ring. At this time, the blades 2143 cannot rotate, and the spiral shape of the blades 2143 plays a vortex role on the high-pressure gas, allowing the high-pressure gas to form a rotating air flow after flowing through the blades.

[0046] In another preferred embodiment, the turbine valve core 2142 is rotatably installed on the ventilation pipe 212 through a bearing, and the top of the turbine valve core 2142 passes through the bearing and is hermetically connected to the bearing. In this way, the turbine valve core can freely rotate inside the ventilation pipe. After the high-pressure gas passes through the blades 2143, it can drive the turbine valve core 2142 and the blades 2143 to rotate, so that the rotation of the blades 2143 can drive the high-pressure gas to rotate together to form a high-pressure air flow.

[0047] In a specific embodiment of the present invention, as shown in Figure 2 and Figure 3 As shown, an installation channel 2114 separated from the slurry channel 2113 is provided in the slurry delivery pipe 211, and the installation channel 2114 is arranged inside the slurry channel 2113; the ventilation pipe 212 passes through the installation channel 2114 and is connected to the slurry delivery pipe 211.

[0048] In this embodiment, the slurry delivery pipe 211 forms an installation channel 2114 through an inner pipe wall provided within the outer pipe wall. The installation channel 2114 is formed through the inner surface of the inner pipe wall. The inner pipe wall separates the installation channel 2114 from the slurry channel 2113, so that the slurry does not come into contact with the ventilation pipe 212. A slurry channel 2113 is formed between the outer surface of the inner pipe wall and the inner surface of the outer pipe wall. The slurry channel 2113 at this inner pipe wall is an annular channel. The top opening of the installation channel 2114 is staggeredly arranged with the feed port 2111, so that the pipes for supplying slurry and gas can be staggered.

[0049] Preferably, the slurry delivery pipe 211 is an integrally formed structure, including a vertical pipe section and a bent pipe section. The top of the bent pipe section is the feed port 2111. The bottom of the bent pipe section is connected to the top of the vertical pipe section. The bottom of the vertical pipe section is the discharge port 2112. The top opening of the installation channel 2114 is arranged at the top of the vertical pipe section for installing the ventilation pipe 212. The vertical pipe section includes an outer pipe wall and an inner pipe wall that are sleeved and connected to each other.

[0050] Furthermore, to facilitate the connection between the slurry delivery pipe 211 and the pipe of the slurry supply device, an installation flange plate is provided at the feed port 2111 of the slurry delivery pipe 211. The installation flange plate can be hermetically connected to the corresponding pipe through a connection buckle 23.

[0051] In a specific embodiment of the present invention, as Figure 3 shown, the slurry discharge slot 2132 is arranged in an inclined shape. There are multiple slurry discharge slots 2132, which are arranged at intervals around the through hole 2131. By providing multiple slurry discharge slots 2132, multiple slurry fluids can be formed around the through hole 2131. Multiple slurry particles can be formed by the cutting of the rotating air flow formed by high-pressure gas. As the slurry fluid continuously flows out, the rotating air flow can continuously cut to form slurry particles.

[0052] Preferably, as Figure 2 and Figure 3As shown, the slurry spray head 213 is buckled on the bottom of the slurry delivery pipe 211. The bottom of the slurry delivery pipe 211 is a cylindrical structure, and the slurry spray head 213 is also cylindrical and is sleeved on the bottom of the slurry delivery pipe 211. The slurry spray head 213 includes an outer cylinder wall, an inner cylinder wall, and an end panel connecting the outer cylinder wall and the inner cylinder wall. A through hole 2131 is formed inside the inner cylinder wall. When the outer cylinder wall is sleeved on the slurry delivery pipe 211, the inner cylinder wall is in contact with the inner pipe wall of the slurry delivery pipe 211 to prevent the slurry from seeping into the gas passage 2123 and the through hole 2131. A plurality of slurry discharge slots 2132 are provided on the end panel, and there is a certain distance between the slurry discharge slots 2132 and the discharge port 2112. To avoid slurry leakage, sealing rings are provided at the end faces of the inner cylinder wall of the slurry spray head 213 and the inner pipe wall of the slurry delivery pipe 211, so as to seal the connection between the inner cylinder wall and the inner pipe wall.

[0053] In a preferred embodiment, the slurry spray head 213 is screwed to the end of the slurry delivery pipe 211. In another preferred embodiment, the slurry spray head 213 is sleeved on the bottom of the slurry delivery pipe 211 and is welded and fixed to the slurry delivery pipe 211.

[0054] In a specific embodiment of the present invention, as Figure 2 and Figure 3 shown, a part of the top of the ventilation pipe 212 is located outside the slurry delivery pipe 211. A pipeline connector 2124 is provided at the part where the ventilation pipe 212 exposes outside the slurry delivery pipe 211. The pipeline connector 2124 is arranged horizontally, and an air inlet 2121 is provided at the end of the pipeline connector 2124. The pipeline connector 2124 can be quickly connected to the air pipe of the air compressor. Preferably, the pipeline connector 2124 is a circular pipe structure, and its end is in a frustum shape, and the size of the outer contour gradually increases from the middle to the end of the pipeline connector 2124, which is convenient for connecting a flexible air pipe.

[0055] The present invention also provides a spraying device with a nozzle structure. The structure of the spraying device will be described below.

[0056] As Figure 4 shown, the spraying device 20 with a spraying structure of the present invention includes a slurry main pipe 22 and a plurality of nozzle structures 21. The slurry main pipe 22 is arranged horizontally. Combining Figures 6 to 7 shown, the slurry main pipe 22 has a main slurry inlet 221 and a plurality of main slurry outlets 222. The nozzle structures 21 are arranged corresponding to the main slurry outlets 222, and the number of the nozzle structures 21 is the same as the number of the main slurry outlets 222. Combining Figures 1 to 3 shown, the nozzle structure 21 is the same as the aforementioned nozzle structure 21 for spraying slurry. For specific structure description, reference can be made to the above description of the nozzle structure 21. The feed port 2111 on the nozzle structure 21 is connected to the corresponding main slurry injection port 222.

[0057] The spraying device 20 is used to achieve the paving of the slurry. The main slurry pipe 22 is horizontally arranged, and the length of the main slurry pipe 22 can be adapted to the width of the paving surface. A plurality of main slurry outlets 222 are arranged on the main slurry pipe 22 at intervals. A nozzle structure 21 is installed at each main slurry outlet 222. The main slurry pipe 22 is used to provide slurry for the plurality of nozzle structures 21. After the slurry passes through each nozzle structure 21, it forms slurry particles and scatters on the paving surface, thereby forming a particle seal layer, which can improve the anti-slip performance of the seal layer surface.

[0058] In a specific embodiment of the present invention, as Figures 4 to 7 shown, the main slurry pipe 22 includes a plurality of pipe fitting units 223 connected by splicing. A main slurry inlet 221 is provided on one of the pipe fitting units 223. A main slurry outlet 222 is provided on each pipe fitting unit 223. The pipe fitting unit 223 at the end has a closed end cover 2231. Thus, the length of the main slurry pipe 22 can be adjusted according to the number of pipe fitting units 223 selected. The main slurry pipe 22 includes at least Figure 5 one pipe fitting unit as shown, and Figure 7 two pipe joint units as shown. The pipe fitting unit 223 with the main slurry inlet 221 in the main slurry pipe 22 is preferably located in the middle of the main slurry pipe 22. Preferably, the length of the main slurry pipe 22 can be assembled and installed according to the width of the construction road surface. The range of the main slurry pipe 22 is usually between 0.6m and 4.2m.

[0059] Furthermore, as Figure 5 shown, an inclined feed pipe 2232 is connected to the top of the pipe fitting unit 223 with the main slurry inlet 221. The top pipe orifice of the feed pipe 2232 is the main slurry inlet 221. The main slurry inlet 221 can be connected to a slurry supply device. The slurry supply device includes a slurry barrel and a slurry pump. The slurry barrel is used to store the slurry. The slurry pump can pump the slurry in the slurry barrel into the main slurry pipe 22 through the main slurry inlet 221. Preferably, the slurry pump can be a diaphragm pump or a screw pump.

[0060] Still further, as Figures 5 to 7 shown, a vertical discharge pipe 2233 is connected to the bottom of the pipe fitting unit 223. The bottom pipe orifice of the discharge pipe 2233 is the main slurry outlet 222. A flange plate is provided at the bottom pipe orifice of the discharge pipe 2233. Through this flange plate, it can be connected to the installation flange plate at the feed inlet 2111 of the slurry delivery pipe 221 of the nozzle structure 21. After the flange plate and the installation flange plate are pasted together, a sealed connection is achieved through the connection buckle 23.

[0061] Yet further, as Figure 5 and Figure 6As shown, a connection end plate is provided at the end of the pipe fitting unit 223. In combination with Figure 4 As shown, when connecting two adjacent pipe fitting units 223, the connection end plates of the two pipe fitting units 223 are placed against each other, and then sealed connection is achieved through the connection buckle 23.

[0062] In a specific embodiment of the present invention, the spraying device 20 of the present invention further includes a mounting base and a lifting mechanism mounted on the mounting base. The lifting mechanism can be adjusted up and down. The lifting mechanism is connected to the slurry main pipe 22. By adjusting the lifting mechanism up and down, the installation height of the slurry main pipe 22 can be adjusted.

[0063] The mounting base can facilitate the installation and fixation of the spraying device 20. When laying the slurry, the mounting base can be fixed on the trailer, and the spraying device 20 can be moved together by the movement of the trailer.

[0064] The lifting mechanism can be adjusted up and down relative to the mounting base. By the lifting mechanism, the height of the nozzle structure 21 from the paving surface can be adjusted. By selecting an appropriate height and matching the forward movement speed of the trailer, the paving density of the slurry particles can be adjusted. Preferably, the height range of the bottom end of the nozzle structure 21 from the paving surface is about 60 cm to 120 cm.

[0065] In a preferred embodiment, the lifting mechanism is a jack fixedly connected to the mounting base. The jack realizes the lifting adjustment through the telescopic piston rod. The end of the piston rod is connected to the slurry main pipe 22. By telescoping the piston rod, the slurry main pipe 22 is driven to be adjusted up and down, thereby realizing the adjustment of the height of the nozzle structure 22 from the paving surface.

[0066] In another preferred embodiment, the lifting mechanism includes a vertically arranged track, a slider sliding on the track, and a driving member drivingly connected to the slider. The driving member can drive the slider to move up and down along the track. The slider can be connected to the slurry main pipe 22 through a bracket, thereby driving the slurry main pipe 22 to move up and down. The driving member is preferably a push rod motor.

[0067] In a specific embodiment of the present invention, the spraying device 20 of the present invention further includes a mounting base and a moving adjustment mechanism mounted on the mounting base. The moving adjustment mechanism can move horizontally back and forth. The moving adjustment is connected to the slurry main pipe 22. By the moving adjustment mechanism, the slurry main pipe 22 can be driven to move horizontally back and forth together, so that the slurry spraying is uniform. Preferably, the horizontal back-and-forth movement distance of the moving adjustment mechanism is consistent with the distance between two adjacent nozzle structures 21.

[0068] Preferably, the moving adjustment mechanism is connected to the slurry main pipe 22 by being connected to the lifting mechanism. The moving adjustment mechanism drives the lifting mechanism to move horizontally back and forth, thereby driving the slurry main pipe 22 to move horizontally back and forth together.

[0069] In a preferred embodiment, the moving and adjusting mechanism includes a horizontally arranged chute, a sliding member slidably disposed in the chute, and a power member drivingly connected to the sliding member. The power member drives the sliding member to move back and forth along the chute. The sliding member is connected to the lifting mechanism, so as to drive the lifting mechanism and the slurry main pipe 22 to move back and forth together. The power member can be a jack or a push rod motor.

[0070] In a specific embodiment of the present invention, the spraying device 20 of the present invention further includes an air compressor communicated with the air inlet 2121 of the ventilation pipe 212. High-pressure gas is introduced into the ventilation pipe 212 through the air compressor, and the pressure of the introduced high-pressure gas is adjustable.

[0071] When the flow rate of the slurry is constant, by adjusting the pressure of the high-pressure gas, the particle size of the slurry particles can be adjusted. When the pressure of the high-pressure gas is increased, the particle size of the slurry particles will become smaller.

[0072] In a specific embodiment of the present invention, the viscosity of the slurry is designed to be between 4.5 pa·s and 7.5 pa·s. The viscosity of the slurry is relatively high. When the slurry particles fall on the paving surface under the action of gravity, the slurry particles will form a pagoda-shaped spherical crown body. The slurry particles are arranged in an interlaced and overlapping manner to form a particle seal layer. During road paving, the material of the slurry can be selected according to the required hardness. The slurry particles have high hardness, strong adhesion force, granular protrusions on the surface, large texture depth, and a high anti-slip coefficient after curing.

[0073] The present invention has been described in detail above in combination with the embodiments of the drawings. Those of ordinary skill in the art can make various variations of the present invention according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope defined in the appended claims.

Claims

1. A nozzle structure for spraying slurry, characterized in that, it includes: A slurry delivery pipe, having an inlet and an outlet arranged oppositely, and a slurry channel communicating the inlet and the outlet is formed inside the slurry delivery pipe; An air pipe disposed inside the slurry delivery pipe, having an air inlet and an air outlet, the air outlet is located inside the outlet, and a gas channel communicating the air inlet and the air outlet is formed inside the air pipe; A slurry spray head installed at the outlet, the slurry spray head plugs the outlet and a through hole is provided in the middle of the slurry spray head corresponding to the air outlet, and a plurality of slurry discharge slots communicating with the outlet and the slurry channel are provided on the end face of the slurry spray head; and A turbine installed inside the air pipe, a part of the turbine extends out of the air outlet and the through hole, by introducing high-pressure gas into the air pipe, and then the high-pressure gas passes through the turbine and blows out from the gap between the turbine and the through hole to form a rotating air flow, and the slurry flowing out from the slurry discharge slot is broken up by the rotating air flow to form slurry particles, thereby completing the spraying of the slurry; A conical structure is provided at the end of the turbine, a part of the conical structure extends out of the air outlet and the through hole, and the size of the part of the conical structure extending out of the through hole is larger than the size of the part located inside the air pipe; The slurry discharge slots are arranged obliquely, and the slurry discharge slots are arranged at intervals around the through hole.

2. The nozzle structure for spraying slurry according to claim 1, characterized in that, A turbine valve core is connected to the turbine, and the turbine is installed on the air pipe through the turbine valve core.

3. The nozzle structure for spraying slurry according to claim 1, characterized in that, An installation channel separated from the slurry channel is provided inside the slurry delivery pipe, and the installation channel is arranged inside the slurry channel; The air pipe is disposed inside the installation channel and connected to the slurry delivery pipe.

4. A spraying device having a nozzle structure, characterized in that, it includes: A horizontally arranged slurry main pipe, having a main slurry inlet and a plurality of main slurry outlets; A plurality of nozzle structures according to any one of claims 1 to 3, the nozzle structures are arranged corresponding to the main slurry outlets, and the inlets on the nozzle structures are connected to the corresponding main slurry outlets.

5. The spraying device having a nozzle structure according to claim 4, characterized in that, It further includes a mounting seat and a lifting mechanism installed on the mounting seat, the lifting mechanism can be adjusted in height, the lifting mechanism is connected to the slurry main pipe, and the set height of the slurry main pipe can be adjusted by lifting and adjusting the lifting mechanism.

6. The spraying device having a nozzle structure according to claim 4, characterized in that, It further includes a mounting seat and a moving adjustment mechanism installed on the mounting seat, the moving adjustment mechanism can move horizontally back and forth, the moving adjustment mechanism is connected to the slurry main pipe, and by moving horizontally back and forth the moving adjustment mechanism, the slurry main pipe can be driven to move horizontally back and forth together, so as to make the slurry spraying uniform.

7. The spraying device with a nozzle structure according to claim 4, characterized in that, it further comprises an air compressor connected to the air inlet of the air pipe, and high-pressure gas is introduced into the air pipe through the air compressor, and the pressure of the introduced high-pressure gas is adjustable.

8. The spraying device with a nozzle structure according to claim 4, characterized in that, the slurry main pipe comprises a plurality of pipe fitting units connected by splicing, and a main slurry inlet is provided on one of the pipe fitting units; a main slurry outlet is provided on each pipe fitting unit; the pipe fitting unit at the end has a closed end cover.

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