Spray-seeding construction device and ecological slope protection spray-seeding construction method thereof

Abstract

The invention provides a spray-seeding construction device and an ecological slope protection spray-seeding construction method thereof, and relates to the technical field of slope greening. The storage tank is arranged on the supporting frame and used for storing grass seed suspension liquid; the spray-seeding pipe is communicated with the storage tank and is used for spraying the grass seed suspension liquid in the storage tank to a seeding area; the pumping device is communicated with the storage tank and is used for pumping the grass seed suspension liquid in the storage tank to the spray-seeding pipe; wherein a backflow pipe is further connected between the pumping device and the storage tank, and the pumping device is configured to enable part of the grass seed suspension liquid to flow back into the storage tank through the backflow pipe while pumping the grass seed suspension liquid to the spray-seeding pipe so as to circularly stir the grass seed suspension liquid in the storage tank, so that the reduction of mechanical damage of stirring blades to grass seeds is facilitated; therefore, the loss rate of the grass seeds is reduced to a certain extent, uniform germination of the grass seeds is promoted, and stable plant communities are conveniently formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope greening, and particularly relates to a spray-seeding construction device and an ecological slope spray-seeding construction method. BACKGROUND

[0002] Slope greening is a slope protection method with ecological and engineering functions, which can protect bare slopes and promote vegetation growth to achieve ecological restoration of the slope. Compared with the traditional slope protection method relying solely on engineering structures, slope greening can enhance the stability of the slope and improve the ecological environment to a certain extent through the soil fixation of the plant roots.

[0003] In the related art, a grass-shrub type slope is usually constructed by using a spray-seeding method, that is, seeds, substrate, water-retaining agents, and bonding materials are mixed and uniformly sprayed on the slope by using a spray-seeding device. However, in actual application, the loss rate of the grass seeds after spray-seeding is high, which causes some seeds to be difficult to germinate normally and is not conducive to the formation of a stable plant community. SUMMARY

[0004] To solve the above problems, the present application provides a spray-seeding construction device and an ecological slope spray-seeding construction method.

[0005] In a first aspect, the present application provides a spray-seeding construction device, which adopts the following technical solution: A spray-seeding construction device, comprising: a support frame; a storage tank arranged on the support frame and used for storing a grass seed suspension; a spray-seeding pipe in communication with the storage tank and used for spraying the grass seed suspension in the storage tank to a seeding area; and a pumping device in communication with the storage tank and used for pumping the grass seed suspension in the storage tank to the spray-seeding pipe; wherein a backflow pipe is further connected between the pumping device and the storage tank, and the pumping device is configured to, while pumping the grass seed suspension to the spray-seeding pipe, make part of the grass seed suspension backflow to the storage tank through the backflow pipe to cyclically stir the grass seed suspension in the storage tank.

[0006] Preferably, the pumping device comprises an inlet, a first outlet, and a second outlet, the inlet is in communication with the storage tank, the first outlet is in communication with the spray-seeding pipe, and the second outlet is in communication with the backflow pipe.

[0007] Preferably, the first outlet is provided with a first valve, and the first valve is used for controlling the opening and closing of the first outlet.

[0008] Preferably, the storage tank comprises a first opening and a second opening, the first opening is in communication with the inlet, the second opening is in communication with the return pipe, and the first opening and the second opening are both located at the bottom side of the storage tank.

[0009] Preferably, a spiral baffle is arranged in at least one of the return pipe and the spray pipe, and the spiral baffle is used to form a spiral channel in at least one of the return pipe and the spray pipe.

[0010] Preferably, the spiral baffle is arranged in the spray pipe, and the spray pipe comprises a spray opening, and the spiral baffle is arranged on the side of the spray pipe close to the spray opening.

[0011] Preferably, the spiral baffles are arranged in both the return pipe and the spray pipe, and the length of the spiral baffle in the return pipe is less than the length of the spiral baffle in the spray pipe.

[0012] Preferably, the spiral baffle comprises a first flexible fitting part and a second flexible fitting part, the first flexible fitting part and the second flexible fitting part are arranged at an included angle and extend along the length direction of the spiral baffle, the first flexible fitting part and the second flexible fitting part are both used to fit the inner wall of the spray pipe, and the first flexible fitting part and the second flexible fitting part form a positive pressure cavity together with the inner wall of the spray pipe.

[0013] Preferably, the spiral baffle is made of an elastic material, the spiral baffle comprises a fixed end and a movable end, the fixed end is limitingly matched with the spray pipe in the circumferential direction of the spray pipe, and the movable end is arranged on the side close to the spray opening of the spray pipe; wherein, the movable end is threadedly connected in the spray pipe, and the spiral baffle is configured to increase or decrease the pitch of the spiral channel in the spray pipe when the movable end spirally moves relative to the spray pipe.

[0014] Preferably, the fixed end is arranged in the spray pipe in the axial sliding mode, the spray pipe is provided with an operation hole at the position corresponding to the fixed end, and an auxiliary material tank is connected at the operation hole, the auxiliary material tank is used to store an auxiliary material solution, and the auxiliary material tank is configured to push the fixed end to slide to the side of the movable end when the auxiliary material tank is in communication with the operation hole, so as to decrease the pitch of the spiral channel.

[0015] Preferably, the auxiliary material tank comprises a mounting part, the mounting part is used to threadedly match with the spray pipe, so as to make the auxiliary material tank in communication with the spray pipe; The mounting portion is configured to at least partially extend into the spray seeding pipe and abut against the fixed end and push the fixed end to slide towards the movable end when the mounting portion rotates relative to the spray seeding pipe.

[0016] Preferably, the auxiliary material tank is provided with an air injection pipe configured to inject air into the auxiliary material solution in the auxiliary material tank to stir the auxiliary material solution and increase the pressure in the auxiliary material tank.

[0017] Preferably, the fixed end is provided with a first inclined surface, and the mounting portion of the auxiliary material tank is provided with a second inclined surface configured to cooperate with the first inclined surface to push the fixed end to slide relative to the spray seeding pipe when the mounting portion is inserted into the spray seeding pipe.

[0018] Preferably, the auxiliary material tank is provided with a pressure relief port having a pressure relief flow rate less than an air injection flow rate of the air injection pipe.

[0019] Preferably, the auxiliary material solution has a color different from a color of the grass seed suspension, and the auxiliary material solution has a color depth greater than a color depth of the grass seed suspension.

[0020] In a second aspect, the application provides an ecological slope spray seeding construction method using the following technical solution: An ecological slope spray seeding construction method includes the following steps: cleaning and leveling the slope surface to be constructed; laying and fixing a layer of protective net on the treated slope surface; spraying the grass seed suspension on the netted slope surface using the spray seeding construction device to form a cover layer; watering and curing the sprayed slope surface until the vegetation is formed.

[0021] In the spray seeding construction device and the ecological slope spray seeding construction method, the pumping device circulates the grass seed suspension in the storage tank through the return pipe while delivering the grass seed suspension to the spray seeding pipe, so that the grass seed suspension in the storage tank is kept in a dynamic mixing state. Through this circulating stirring method, the grass seeds, the matrix, the water and the auxiliary materials can be fully dispersed without relying on mechanical stirring structures, and the distribution of the grass seed suspension sprayed by the spray seeding pipe is more uniform. Compared with the traditional mechanical stirring method, this structure can avoid mechanical damage to the grass seeds by stirring blades, and is also conducive to reducing the settlement and agglomeration of the grass seeds during storage and spray seeding, thereby reducing the grass seed loss rate to a certain extent, promoting uniform germination of the grass seeds, and facilitating the formation of a stable plant community. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 is a structural schematic diagram of a spray-seeding construction device in the embodiment of the present application; Figure 2 is a front view of the spray-seeding construction device in the embodiment of the present application; Figure 3 is a front view of the spray-seeding construction device without installation of an auxiliary material tank in the embodiment of the present application; Figure 4 is a partial sectional view of the spray-seeding construction device in the embodiment of the present application; Figure 5 is Figure 4 is an enlarged structural schematic diagram of part A in Figure 6 is a first structural schematic diagram of a spiral baffle in the embodiment of the present application; Figure 7 is a second structural schematic diagram of the spiral baffle in the embodiment of the present application; Figure 8 is a sectional view of the spiral baffle in the embodiment of the present application; Figure 9 is a sectional view of an auxiliary material tank in the embodiment of the present application.

[0024] In the drawings, the following are marked: 100, support frame; 200, storage tank; 210, first opening; 220, second opening; 300, spray-seeding pipe; 310, spiral baffle; 311, fixed end; 311a, first inclined surface; 312, movable end; 313, first flexible fitting part; 314, second flexible fitting part; 315, positive pressure cavity; 316, spiral channel; 320, spray port; 330, operation hole; 400, pumping device; 410, return pipe; 420, inlet; 430, first outlet; 431, first valve; 440, second outlet; 500, auxiliary material tank; 510, mounting part; 511, second inclined surface; 520, air injection pipe; 530, pressure relief port. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present application.

[0026] The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0027] According to a first aspect of the present application, with reference to Figures 1 to 9 The present application provides a spray seeding construction device suitable for slope greening construction. The spray seeding construction device is configured to spray the grass seed suspension formed by mixing the grass seeds with the substrate, water and auxiliary materials to the slope surface to be constructed, so that the grass seeds are uniformly distributed on the surface layer of the slope, thereby realizing vegetation coverage in the subsequent maintenance process, achieving the purpose of slope greening and ecological restoration.

[0028] With reference to Figure 1 and Figure 2 The spray seeding construction device comprises a support frame 100, a storage tank 200, a spray seeding pipe 300 and a pumping device 400. The support frame 100 is used to provide a stable mounting base for the storage tank 200 and the pumping device 400, so that the components can maintain a reasonable spatial arrangement relationship, facilitating the maintenance of balance and stability of the device during spray seeding operation. The support frame 100 can be in the form of a steel structure frame, a profiled welded frame or an aluminum alloy frame, etc. According to the construction site conditions, materials with corrosion or rust resistance can also be selected to adapt to long-term outdoor use.

[0029] The storage tank 200 is arranged on the support frame 100, and the storage tank 200 is a hollow tank body, and an accommodating cavity for storing the grass seed suspension is formed inside. The outer wall of the storage tank 200 can be in the form of a cylinder, an ellipse or a polygon, so as to improve the strength of the tank body while meeting the volume requirement. The material of the tank body can be selected from metal materials or composite materials with good corrosion resistance and sealing performance, such as stainless steel, aluminum alloy, glass fiber reinforced plastic, etc., so as to facilitate the prevention of leakage of the suspension and easy cleaning and maintenance.

[0030] It should be understood that the grass seed suspension is a mixed liquid formed by mixing the grass seed with the auxiliary materials required for spray seeding, which can include grass seed, matrix, water-retaining agent, binding material, fertilizer, and water, etc. The proportions of the components can be adjusted according to the soil conditions and vegetation requirements of the construction slope surface, so that the grass seed can better adhere to the slope surface after spray seeding and have a suitable germination environment. Through the containing and sealing effects of the storage tank 200, the grass seed suspension can maintain a uniformly mixed state before spray seeding, which is conducive to maintaining the stability and consistency of the sprayed liquid during spray seeding.

[0031] In some embodiments, the bottom of the storage tank 200 can be provided with an outlet port in communication with the pumping device 400, so that the pumping device 400 can directly extract the grass seed suspension from the bottom of the storage tank 200. This is conducive to reducing the amount of suspension retained at the bottom of the tank, and also improves the pumping efficiency. The upper part of the storage tank 200 can also be provided with a liquid inlet or an inspection port for adding grass seed and other mixed materials, or for maintenance and cleaning operations.

[0032] Through the above structural arrangement, the storage tank 200 can provide a stable source of suspension for the spray seeding system during construction, and the shape and material selection of the tank body help to maintain the uniformity and flowability of the grass seed suspension, providing a good prerequisite for subsequent pumping and spray seeding processes.

[0033] In some embodiments, with reference to Figure 1 and Figure 2 , the spray seeding pipe 300 is used to communicate with the storage tank 200, and the grass seed suspension in the storage tank 200 can be transported and sprayed to the target seeding area via the spray seeding pipe 300, thereby realizing the spray seeding construction on the slope surface.

[0034] In some embodiments, the pumping device 400 communicates with the storage tank 200 for pumping the grass seed suspension in the storage tank 200 to the spray seeding pipe 300, and a return pipe 410 is further connected between the pumping device 400 and the storage tank 200, and the pumping device 400 is configured to, while pumping the grass seed suspension to the spray seeding pipe 300, make part of the grass seed suspension return to the storage tank 200 through the return pipe 410, so as to circulate and stir the grass seed suspension in the storage tank 200.

[0035] The flow circulation formed by the return can promote the continuous stirring of the grass seed suspension in the storage tank 200 to a certain extent, so that the components such as seed, matrix, and water-retaining agent can maintain a relatively uniform distribution state, thereby facilitating uniform coverage of the grass seed during spraying.

[0036] The pumping device 400 can adopt a structure form of a centrifugal pump or a plunger pump, etc. to adapt to grass seed suspensions of different concentrations or viscosities; the return pipe 410 can be arranged at the bottom or sidewall of the storage tank 200, and the return port thereof faces the bottom of the tank body to form a certain impinging flow during the return process, which is beneficial to the disturbance and redispersion of the sediment at the bottom of the tank. Further, an adjusting valve can be further arranged on the return pipe 410 for controlling the return proportion, so as to realize the adjustment of the stirring intensity of the grass seed suspension.

[0037] Through the above structural arrangement, the pumping device 400 can not only maintain the continuous supply of the spray seeding operation, but also form an internal circulation flow field in the storage tank 200, which is beneficial to preventing the solid components in the grass seed suspension from being stratified or settled during the standing process, and further makes the spray seeding construction process more stable and reliable.

[0038] In some embodiments, referring to Figure 1 and Figure 3 , the pumping device 400 includes an inlet 420, a first outlet 430 and a second outlet 440. The inlet 420 is in communication with the storage tank 200 for extracting the grass seed suspension from the storage tank 200; the first outlet 430 is in communication with the spray seeding pipe 300 for delivering the extracted grass seed suspension to the seeding area; and the second outlet 440 is in communication with the return pipe 410 for returning part of the grass seed suspension to the storage tank 200 to realize the circulation stirring. Exemplarily, the structure of the pumping device 400 can be a single multi-channel pump, a bidirectional pump or other pump types capable of controlling the flow rates of the two outlets respectively to adapt to different construction requirements or suspension characteristics.

[0039] In some embodiments, the first outlet 430 is provided with a first valve 431 for controlling the opening and closing of the first outlet 430. Exemplarily, the first valve 431 is used to adjust or control the flow rate of the grass seed suspension flowing to the spray seeding pipe 300 through the first outlet 430, so as to be able to moderately adjust the liquid delivery amount during the spray seeding process. For example, the first valve 431 can be a ball valve, a gate valve, a butterfly valve or a needle valve, etc. in structure, and the specific selection thereof can be determined according to the flow rate adjustment accuracy, operation convenience and corrosion resistance requirements of the construction site.

[0040] In some embodiments, referring to Figure 2 and Figure 3The storage tank 200 includes a first opening 210 and a second opening 220. The first opening 210 is in communication with the inlet 420 for extracting the grass seed suspension from the bottom of the storage tank 200. The second opening 220 is in communication with the return pipe 410 for guiding part of the returned grass seed suspension into the storage tank 200 to achieve the circulation and stirring. The first opening 210 and the second opening 220 are both located at the side of the bottom of the storage tank 200, so as to reduce the retention of the tank bottom sediment during the pumping and returning, and to benefit the uniform stirring of the grass seed suspension. Exemplarily, the number, position or shape of the first opening 210 and the second opening 220 can be adjusted according to the capacity of the storage tank 200 and the liquid flow characteristics. For example, the opening can be a circular, oval or rectangular opening, and can be used in cooperation with a filter screen or a valve to further control the liquid flow and prevent impurities from blocking.

[0041] In some embodiments, referring to Figure 4 and Figure 5 , the spiral baffle 310 is arranged in at least one of the return pipe 410 and the spray pipe 300, and is used to form a spiral channel 316 in the at least one of the return pipe 410 and the spray pipe 300. When the grass seed suspension passes through the spiral channel 316, the grass seed suspension is subjected to division, shearing and rotation, and recombines at the outlet of the channel, so as to achieve the uniform mixing of the multi-layer fluid. Through this structural arrangement, the uniformity of the grass seed suspension can be maintained during the spray seeding, and the grass seed can uniformly cover the seeding area.

[0042] In some embodiments, the spiral baffle 310 can be a fixed or adjustable structure, and can be made of elastic or rigid materials to adapt to the requirements of different suspension concentrations and flow rates. The pitch, length and arrangement angle of the spiral baffle 310 can be adjusted according to the diameters of the spray pipe 300 and the return pipe 410 and the construction requirements, so as to achieve a moderate shearing strength and mixing effect. In addition, the spiral baffle 310 can be arranged in segments along the axial direction of the pipe, or arranged in both the spray pipe 300 and the return pipe 410, to further improve the circulation and mixing effect of the liquid.

[0043] In some embodiments, referring to Figure 4 and Figure 5 , the spiral baffle 310 is arranged in the spray pipe 300, and the spray pipe 300 includes a spray port 320. The spiral baffle 310 is arranged on the side of the spray pipe 300 close to the spray port 320. During the passage of the grass seed suspension through the spray pipe 300, the spiral baffle 310 can cause the liquid to be divided, rotated and recombined, so as to improve the uniformity of the liquid, and benefit the grass seed to more uniformly cover the seeding area when sprayed.

[0044] In some embodiments, the spiral baffle 310 is arranged in the return pipe 410 and the spray pipe 300, the length of the spiral baffle 310 in the return pipe 410 is less than the length of the spiral baffle 310 in the spray pipe 300. The shorter spiral baffle 310 in the return pipe 410 can reduce the influence on the flow rate of the grass seed suspension to some extent, so that the liquid can flow back to the storage tank 200 faster, and at the same time, the circulation stirring is formed, which is beneficial to the uniform mixing of the grass seed suspension in the storage tank 200 and the re-dispersion of the suspended components.

[0045] Exemplarily, the pitch of the spiral baffle 310 in the return pipe 410 is greater than the pitch of the spiral baffle 310 in the spray pipe 300.

[0046] In some embodiments, referring to Figure 6 and Figure 8 The spiral baffle 310 includes a first flexible fitting part 313 and a second flexible fitting part 314, the first flexible fitting part 313 and the second flexible fitting part 314 are arranged at an included angle and extend along the length direction of the spiral baffle 310, the first flexible fitting part 313 and the second flexible fitting part 314 are both used to fit the inner wall of the spray pipe 300, and the first flexible fitting part 313 and the second flexible fitting part 314 form a positive pressure cavity 315 together with the inner wall of the spray pipe 300. During the process that the grass seed suspension passes through the spray pipe 300, the first flexible fitting part 313 and the second flexible fitting part 314 can maintain the effective contact of the spiral baffle 310 with the inner wall of the spray pipe 300, which is beneficial to improving the division, shearing and rotation of the liquid and realizing more uniform mixing. At the same time, the existence of the positive pressure cavity 315 can adjust the deformation direction of the flexible fitting part under the conditions of liquid flow and pipeline vibration, so as to maintain the sealing fit of the spiral baffle 310 with the inner wall of the spray pipe 300, and further stabilize the mixing effect.

[0047] Exemplarily, the first flexible fitting part 313 and the second flexible fitting part 314 can be made of elastic materials, such as rubber, polyurethane or elastic composite materials; the included angle, the length and the thickness can be adjusted according to the diameter of the spray pipe 300, the flow rate and the viscosity of the grass seed suspension, so as to adapt to different construction conditions and liquid properties. In addition, the structure of the first flexible fitting part 313 and the second flexible fitting part 314 can be single piece, double pieces or multiple pieces of superposition, so as to adjust the liquid shearing strength and the mixing effect while maintaining the sealing.

[0048] In some embodiments, referring to Figure 5 and Figure 6The helical baffle 310 is made of elastic material, and includes a fixed end 311 and a movable end 312. The fixed end 311 is in limiting cooperation with the spray seeding pipe 300 in the circumferential direction of the spray seeding pipe 300, and the movable end 312 is arranged close to the nozzle 320 side of the spray seeding pipe 300. The movable end 312 is threadedly connected in the spray seeding pipe 300, and the helical baffle 310 is configured to increase or decrease the pitch of the helical channel 316 in the spray seeding pipe 300 when the movable end 312 moves helically relative to the spray seeding pipe 300.

[0049] By adjusting the pitch, the shearing and rotating intensity of the grass seed suspension in the helical channel 316 can be changed, so as to adjust the mixing effect of the liquid. When the pitch is small, the helical channel 316 is more compact, and the liquid will generate strong division and rotation when passing through the channel, so that the grass seed suspension is mixed more uniformly. When the pitch is large, the resistance of the liquid passing through the channel is reduced, the flow rate is increased, and the shearing effect is weakened, which is suitable for construction scenes that require high jetting speed.

[0050] In the specific working process, when it is necessary to increase the mixing effect of the liquid, the movable end 312 can be rotated clockwise or counterclockwise to reduce the pitch, so that the liquid experiences more shearing and rotation in the channel. When it is necessary to increase the flow rate of the liquid or reduce the shearing effect, the movable end 312 can be rotated to increase the pitch, so that the liquid quickly flows out of the nozzle 320.

[0051] For example, a hand or a tool can be inserted into the spray seeding pipe 300 from the nozzle 320 side to rotate the movable end 312, so that the movable end 312 rotates in the helical direction relative to the spray seeding pipe 300, thereby adjusting the pitch of the helical baffle 310. In this way, the shearing and rotating effect of the helical channel 316 can be flexibly adjusted according to the flow rate and mixing requirements of the grass seed suspension during construction, so as to realize uniform mixing and appropriate flow rate of the spray seeding liquid.

[0052] It should be understood that, since the helical baffle 310 is made of elastic material, when the movable end 312 is rotated, the helical rotation of the movable end 312 can sequentially transmit the elastic deformation to the fixed end 311, so as to adjust the pitch of the entire helical baffle 310. Through this elastic transmission mode, the pitch of the helical channel 316 can be continuously and uniformly adjusted without disassembling the spray seeding pipe 300, so as to flexibly control the mixing intensity and flow rate of the grass seed suspension, which is beneficial to improving the uniformity and coverage effect of the spray seeding liquid.

[0053] In some embodiments, referring to Figure 5 and Figure 7 , the fixed end 311 is slidingly arranged in the spray seeding pipe 300 in the axial direction of the spray seeding pipe 300, and the spray seeding pipe 300 is provided with an operation hole 330 at the position corresponding to the fixed end 311 (in combination with Figure 3As shown in FIG. 6, the auxiliary material tank 500 is connected to the operation hole 330, and is configured to store an auxiliary material solution. When the auxiliary material tank 500 is in communication with the operation hole 330, the auxiliary material tank 500 is configured to push the fixed end 311 to slide to the side of the movable end 312, so as to reduce the pitch of the spiral baffle 310. Through the sliding of the fixed end 311, the pitch of the spiral baffle 310 can be reduced, so as to enhance the shearing and rotating effect of the spiral channel 316 in the spray seeding pipe 300, thereby improving the mixing effect of the grass seed suspension and the auxiliary material solution.

[0054] In some special areas, such as the edge position of a green area, multiple grass seeds or flower seeds need to be sprayed. At this time, the auxiliary material tank 500 containing flower seeds can be installed at the operation hole 330, so that the auxiliary material tank 500 is in communication with the spray seeding pipe 300, and the solution in the auxiliary material tank 500 gradually enters the spray seeding pipe 300, and is fully mixed under the action of the spiral baffle 310, so as to spray the special liquid required in the special area.

[0055] It should be understood that the auxiliary material solution in the auxiliary material tank 500 is not limited to a specific type, and can also be other suitable substances. For example, in some areas with strong wind, the auxiliary material solution can be a liquid with certain viscosity, so as to improve the adhesion of the grass seeds to the slope surface after spraying, thereby benefiting the stable distribution and germination of the grass seeds in a complex environment.

[0056] Exemplarily, the mounting portion 510 of the auxiliary material tank 500 can adopt a threaded connection structure, so that when the auxiliary material tank 500 is screwed into the operation hole 330, the auxiliary material tank 500 is in contact with the fixed end 311 of the spray seeding pipe 300, and pushes the fixed end 311 to slide along the axial direction of the spray seeding pipe 300. By rotating the auxiliary material tank 500, the fixed end 311 is gradually moved in the axial direction, so as to reduce the pitch of the spiral baffle 310, thereby enhancing the shearing and rotating effect of the spiral channel 316 on the grass seed suspension and the auxiliary material solution, and realizing the adjustment of the mixing effect.

[0057] In addition, the auxiliary material tank 500 can also be connected to the operation hole 330 through a buckle, a push rod or other slidable mechanical connection structure, so as to push the fixed end 311 to slide along the axial direction of the spray seeding pipe 300, and achieve a similar pitch adjustment effect.

[0058] Through the above-mentioned manner, the pitch of the spiral baffle 310 can be flexibly adjusted without disassembling the spray seeding pipe 300, so as to adapt to the flow rate and mixing requirements of different spray seeding areas. For example, a larger pitch can be maintained on a wide slope to ensure the spraying speed, and the pitch can be reduced in a special narrow side or edge area, so as to improve the mixing uniformity and reduce the spraying speed, thereby realizing the accurate control of the spraying range.

[0059] Referring to Figure 4 and Figure 5In use, the movable end 312 can be operated from the side of the nozzle 320 to change the pitch and number of turns of the helical baffle 310, thereby changing the geometry of the helical channel 316 to cause the grass seed suspension to exhibit different mixing effects and spray ranges, and the spray seeding operation can be performed after the adjustment is made to the appropriate state. When the spray seeding is performed in a special area, the auxiliary material tank 500 containing the desired plant seeds or other materials can be installed into the operation hole 330, and the auxiliary material tank 500 pushes the fixed end 311 to move towards the movable end 312 when the auxiliary material tank 500 is in communication with the operation hole 330 and inserted into the spray seeding pipe 300, thereby achieving the adjustment of changing only the pitch of the helical baffle 310 without changing the number of turns.

[0060] With reference to Figure 5 and Figure 7 , it should be understood that the pitch can be adjusted by operating the fixed end 311 while keeping the number of turns unchanged. Specifically, assuming that the pitch is p and the number of turns is N, the projection length of the helical channel 316 in the axial direction is L = p N. Therefore, when only the pitch p is reduced without changing the number of turns N, the axial length and the volume of the helical channel 316 are correspondingly reduced, and at the same time, the circumferential component in each turn is relatively increased, which means that the proportion of the circumferential interaction of the fluid with the guide surface in each turn is improved, thereby facilitating the mixing mechanisms such as shearing, segmentation, and recombination, and facilitating the redispersion and uniform mixing of the solid particles in the grass seed suspension.

[0061] Since the reduction of the pitch does not cause a significant reduction in the effective flow cross section, the reduction in the length and volume of the helical channel 316 reduces the overall pressure loss of the system; under a constant driving pressure, this pressure loss reduction causes a slight increase in the instantaneous flow rate through the helical channel 316, and the instantaneous jet velocity at the nozzle 320 can be correspondingly increased. At this time, due to the enhanced circumferential disturbance caused by the reduction of the pitch, the mixing intensity is expected to be improved, and the increase in the jet velocity can compensate for the reduction in the flow rate to some extent when the auxiliary material tank 500 is inserted (when the auxiliary material tank 500 is inserted into the spray seeding pipe 300 through the operation hole 330 to push the fixed end 311, the part of the auxiliary material tank 500 inserted into the spray seeding pipe 300 will cause the flow velocity in the spray seeding pipe 300 to decrease), thereby maintaining a relatively stable spray seeding effect and avoiding a significant impact on the spray seeding range and effect after the auxiliary material tank 500 is installed.

[0062] Therefore, by changing only the pitch while keeping the number of turns unchanged, the mixing intensity and the spray seeding characteristics can be adjusted without changing the overall helical turn structure.

[0063] In some embodiments, with reference to Figure 5 and Figure 9The auxiliary material tank 500 comprises a mounting portion 510 configured to threadedly cooperate with the spray seeding pipe 300 to enable the auxiliary material tank 500 to communicate with the spray seeding pipe 300; the mounting portion 510 is configured to at least partially extend into the spray seeding pipe 300 and abut against the fixed end 311 and push the fixed end 311 to slide towards the movable end 312 when the mounting portion 510 rotates relative to the spray seeding pipe 300. By pushing the fixed end 311, the pitch of the helical baffle 310 can be reduced, thereby enhancing the shearing and rotating effect of the helical passage 316 in the spray seeding pipe 300 on the grass seed suspension and the auxiliary material solution, so that the liquid can be more fully mixed during the flow process and the mixing uniformity is improved.

[0064] It should be understood that the mounting portion 510 can have various structural forms, such as a threaded structure, a wedge-shaped structure, a guide groove structure, or other structures capable of pushing the fixed end 311 when rotating or sliding. Through these structures, after the auxiliary material tank 500 is connected with the spray seeding pipe 300, the pitch of the helical baffle 310 can be adjusted without disassembling the spray seeding pipe 300.

[0065] Exemplarily, with reference to Figure 4 and Figure 5 When the auxiliary material tank 500 is rotated into the operation hole 330, the mounting portion 510 gradually contacts and pushes the fixed end 311 to slide, and the axial movement of the fixed end 311 will in turn cause the overall pitch of the helical baffle 310 to change. The reduction of the pitch is beneficial to enhance the mixing effect of the helical baffle 310 on the liquid, and at the same time, for narrow or special areas, the spraying speed can be reduced to enable the liquid to be more uniformly sprayed to the target area, thereby achieving effective distribution of the grass seed and the auxiliary material solution.

[0066] Exemplarily, an inclined surface can be provided on the fixed end 311, and when the mounting portion 510 of the auxiliary material tank 500 gradually inserts into the spray seeding pipe 300, the mounting portion 510 cooperates with the inclined surface to enable the fixed end 311 to slide axially along the spray seeding pipe 300. Through this sliding, the pitch of the helical baffle 310 can change, thereby enhancing the mixing effect of the helical passage 316 in the spray seeding pipe 300 on the grass seed suspension and the auxiliary material solution, which is beneficial to achieve uniform distribution of the liquid.

[0067] It should be understood that the angle and shape of the inclined surface can be selected or adjusted according to actual needs, for example, a continuous inclined surface, a stepped inclined surface, or a curved inclined surface can be used to produce a progressive pushing effect when the mounting portion 510 is inserted. Meanwhile, a plurality of inclined surfaces can be arranged side by side or in combination to adapt to helical baffles 310 of different diameters or lengths and to adjust the sliding amplitude of the fixed end 311.

[0068] Through the structural arrangement, in the process of installing the auxiliary material tank 500, the fixed end 311 can be slid without additional operation to adjust the pitch of the spiral baffle 310, realize flexible control of the liquid mixing efficiency and spraying speed in the spray seeding pipe 300, and adapt to the spraying requirements of different construction areas.

[0069] It should be understood that the above description refers to Figure 5 and Figure 8 In the process of adjusting the pitch of the spiral baffle 310, the first flexible fitting part 313 and the second flexible fitting part 314 will slide relative to the inner wall of the spray seeding pipe 300 to a certain extent. Since the radial dimension of the spiral baffle 310 body will change when it is axially stretched or compressed, without constraints, the first flexible fitting part 313 and the second flexible fitting part 314 can produce uncertain deformation in direction, affecting the fitting effect. Therefore, the positive pressure cavity 315 is arranged between the first flexible fitting part 313 and the second flexible fitting part 314. Under the action of internal gas or fluid pressure, the positive pressure cavity 315 can exert a supporting force on the two fitting parts, thereby helping to guide the first flexible fitting part 313 and the second flexible fitting part 314 to deform under stress in opposite directions, so that the first flexible fitting part 313 and the second flexible fitting part 314 maintain a controlled deformation direction during adjustment.

[0070] Through the supporting action of the positive pressure cavity 315, the first flexible fitting part 313 and the second flexible fitting part 314 always maintain a close contact relationship with the inner wall of the spray seeding pipe 300 during pitch adjustment, avoiding the occurrence of looseness or gap, which is beneficial to maintaining the sealing continuity and mixing stability of the spiral channel 316. At the same time, when the pitch changes cause the outer diameter of the spiral baffle 310 to increase or decrease, the first flexible fitting part 313 and the second flexible fitting part 314 can realize dynamic compensation within the range of elastic deformation, so that the fitting state of the spiral baffle 310 and the inner wall of the spray seeding pipe 300 is more stable, further improving the flow uniformity and mixing effect of the grass seed suspension.

[0071] In some embodiments, the above description refers to Figure 5 and Figure 7, the fixed end 311 is provided with a first inclined surface 311a, and the mounting portion 510 of the auxiliary material tank 500 is provided with a second inclined surface 511, which is configured to cooperate with the first inclined surface 311a when the mounting portion 510 is inserted into the spray seeding pipe 300, so as to push the fixed end 311 to slide relative to the spray seeding pipe 300. During the process of inserting the mounting portion 510 into the spray seeding pipe 300, the mounting portion 510 is in contact with the first inclined surface 311a, and under the guidance of the first inclined surface 311a, the fixed end 311 gradually slides along the spray seeding pipe 300 in the axial direction, so as to reduce the pitch of the spiral channel 316. Since the mounting portion 510 has the second inclined surface 511, when the mounting portion 510 rotates relative to the spray seeding pipe 300, the cooperation position between the first inclined surface 311a and the second inclined surface 511 changes, so that the distance of pushing the fixed end 311 to move changes with the rotation angle. For example, as shown in Figure 5 , when the lowest end of the second inclined surface 511 is in contact with the first inclined surface 311a, the fixed end 311 is pushed to the rightmost position; when the highest end of the second inclined surface 511 is in contact with the first inclined surface 311a, the axial movement distance of the fixed end 311 is smaller. Through the above structural arrangement, the pitch of the spiral channel 316 can be adjusted according to the rotation angle of the mounting portion 510, so as to facilitate quick adjustment according to actual needs during use.

[0072] In some embodiments, referring to Figure 4 and Figure 9 , the auxiliary material tank 500 is provided with a gas injection pipe 520, which is configured to inject gas into the auxiliary material solution in the auxiliary material tank 500, so as to stir the auxiliary material solution and increase the pressure in the auxiliary material tank 500. By injecting gas through the gas injection pipe 520, a disturbance flow field can be formed in the auxiliary material tank 500, so that the auxiliary material solution produces a circulating motion inside the tank body, thereby achieving a certain degree of stirring and mixing of the auxiliary material solution, which is beneficial to preventing the suspended particles in the auxiliary material solution from settling and maintaining the uniformity of the solution.

[0073] Further, the gas injection of the gas injection pipe 520 also increases the pressure inside the auxiliary material tank 500, which helps to push the auxiliary material solution to enter the spray seeding pipe 300 through the operation hole 330 when the auxiliary material tank 500 is communicated with the spray seeding pipe 300, so that the auxiliary material solution can be mixed with the grass seed suspension in time, and the mixing uniformity and flow continuity during spraying are improved.

[0074] It should be understood that the gas of the gas injection pipe 520 can be compressed air, inert gas or other suitable gas; the outlet of the gas injection pipe 520 can be in the form of a single hole, a ring-shaped multi-hole or a spiral arrangement, etc., to adapt to the flow characteristics and mixing needs of different auxiliary material solutions. For example, when the viscosity of the auxiliary material solution is high, a multi-hole ring-shaped gas injection pipe 520 structure can be adopted to enhance the gas disturbance effect.

[0075] In some embodiments, referring toFigure 4 and Figure 9 The auxiliary material tank 500 is provided with a pressure relief port 530, and the pressure relief flow rate of the pressure relief port 530 is less than the jet flow rate in the jet pipe 520. By continuously injecting gas into the auxiliary material tank 500 through the jet pipe 520, a stable positive pressure environment can be formed inside the auxiliary material tank 500; at the same time, the pressure relief port 530 is configured to release part of the gas when the pressure in the auxiliary material tank 500 reaches a set range, thereby regulating and limiting the pressure in the tank.

[0076] Through the cooperation of the jet pipe 520 and the pressure relief port 530, the air pressure gradient in the auxiliary material tank 500 can be stabilized to a certain extent, and slow and uniform pressure changes are formed in the tank. When the auxiliary material tank 500 is in communication with the spray pipe 300, the air pressure in the tank can stably push the auxiliary material solution to flow into the spray pipe 300 through the operation hole 330, realizing the continuous and uniform entry of the auxiliary material solution. This can avoid the situation that the jetting speed suddenly changes due to air pressure fluctuations, and is conducive to maintaining the mixing stability of the auxiliary material solution and the grass seed suspension.

[0077] It should be understood that the pressure relief port 530 can be provided as a one-way valve structure to automatically relieve pressure when the pressure in the auxiliary material tank 500 exceeds a threshold value; or an adjustable throttle hole or microporous membrane structure can be used to adjust the pressure relief rate by changing the diameter of the pressure relief port 530, so as to adapt to different jet flow rates or different viscosity conditions of the auxiliary material.

[0078] In some embodiments, the color of the auxiliary material solution is different from the color of the grass seed suspension, and the color depth of the auxiliary material solution is greater than the color depth of the grass seed suspension. By making the two liquids have obvious color contrast, it can be determined whether the current spray area contains the auxiliary material solution according to the color change of the sprayed mixed liquid during the spray construction. For example, when the color of the sprayed liquid deepens, it can be determined that the mixed liquid containing the auxiliary material is being sprayed in this area, thereby facilitating the operator to identify and control the auxiliary material spray range.

[0079] This color difference design is conducive to distinguishing different functional areas during on-site construction, facilitating the marking of the auxiliary material solution spray area and reducing the possibility of repeated spraying or missed spraying. At the same time, since the spray state can be judged by color recognition, additional monitoring devices or sensing equipment are not required, the structure is simplified, and the operation is intuitive.

[0080] It should be understood that the color of the auxiliary material solution can be obtained by adding harmless coloring agents, which can be plant extract pigments, mineral pigments or food-grade dyes, etc., and will not cause adverse effects on grass seed germination and later vegetation growth. In other embodiments, the color of the auxiliary material solution can also be adjusted according to different topography or construction environment, so as to maintain good visual recognition under different light conditions.

[0081] According to a second aspect of the present application, the present application provides an ecological slope protection spray seeding construction method comprising the spray seeding construction device in the above embodiments. The ecological slope protection spray seeding construction method has all the beneficial effects of the spray seeding construction device, which will not be repeated here.

[0082] The ecological slope protection spray seeding construction method comprises the following steps: The slope surface to be constructed is cleaned and leveled; loose soil and stones and sundries on the slope surface are removed, so that the slope surface has a certain flatness and stability, to facilitate the smooth progress of subsequent spray seeding operation.

[0083] A protective net is laid and fixed on the treated slope surface; the protective net can be a metal net or a high polymer material net, which serves to enhance the adhesion of the grass seed cover layer to the slope surface, and is conducive to the stable distribution of the grass seed suspension after spray seeding, preventing loss caused by rainwater erosion.

[0084] The spray seeding construction device using the above technical solution sprays the grass seed suspension on the netted slope surface, so that the grass seed suspension is evenly covered on the surface layer of the slope surface to form an initial cover layer. Due to the arrangement of the pumping device 400, the backflow pipe 410 and the spiral baffle 310 structure in the spray seeding construction device, the grass seed suspension can be circulated and stirred by backflow before spraying, thereby being conducive to the uniform distribution of the composition of the grass seed suspension, and ensuring the consistency of the thickness and density of the spray seeding layer.

[0085] The sprayed slope surface is watered and maintained, and the slope surface is kept wet within a certain period of time, to facilitate the water absorption, swelling and germination of the grass seeds, until the vegetation gradually forms and covers the slope surface, to realize the ecological restoration of the slope body.

[0086] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A hydroseeding device, characterized in that, include: Support frame (100); A storage tank (200), disposed on the support frame (100), is used to store grass seed suspension; A spray pipe (300) is connected to the storage tank (200) and is used to spray the grass seed suspension in the storage tank (200) to the sowing area; and A pumping device (400) is connected to the storage tank (200) and is used to pump the grass seed suspension in the storage tank (200) to the spraying pipe (300); The pumping device (400) is connected to the storage tank (200) by a return pipe (410). The pumping device (400) is configured to pump grass seed suspension into the seeding pipe (300) while allowing a portion of the grass seed suspension to flow back into the storage tank (200) through the return pipe (410) to circulate and agitate the grass seed suspension in the storage tank (200).

2. The hydroseeding device according to claim 1, characterized in that, The pumping device (400) includes an inlet (420), a first outlet (430) and a second outlet (440). The inlet (420) is connected to the storage tank (200), the first outlet (430) is connected to the spraying pipe (300), and the second outlet (440) is connected to the return pipe (410).

3. The hydroseeding device according to claim 2, characterized in that, The first outlet (430) is provided with a first valve (431), which is used to control the opening and closing of the first outlet (430); and / or, The storage tank (200) includes a first opening (210) and a second opening (220). The first opening (210) is connected to the inlet (420), and the second opening (220) is connected to the reflux pipe (410). Both the first opening (210) and the second opening (220) are located on the bottom side of the storage tank (200).

4. The hydroseeding device according to claim 1, characterized in that, A spiral baffle (310) is provided in at least one of the return pipe (410) and the spray pipe (300), the spiral baffle (310) being used to form a spiral channel (316) in at least one of the return pipe (410) and the spray pipe (300).

5. The hydroseeding device according to claim 4, characterized in that, The hydroseeding pipe (300) is provided with the spiral baffle (310), the hydroseeding pipe (300) includes a nozzle (320), and the spiral baffle (310) is disposed on the side of the hydroseeding pipe (300) near the nozzle (320); and / or, Both the return pipe (410) and the seeding pipe (300) are provided with the spiral baffle (310), the length of the spiral baffle (310) in the return pipe (410) is less than the length of the spiral baffle (310) in the seeding pipe (300); and / or, The spiral baffle (310) includes a first flexible fitting part (313) and a second flexible fitting part (314). The first flexible fitting part (313) and the second flexible fitting part (314) are arranged at an included angle and extend along the length direction of the spiral baffle (310). The first flexible fitting part (313) and the second flexible fitting part (314) are both used to fit against the inner wall of the spray pipe (300). The first flexible fitting part (313) and the second flexible fitting part (314) together with the inner wall of the spray pipe (300) form a positive pressure cavity (315).

6. The hydroseeding device according to claim 4, characterized in that, The spiral baffle (310) is made of an elastic material and includes a fixed end (311) and a movable end (312). The fixed end (311) is engaged with the spray pipe (300) in a circumferential upper limit fit, and the movable end (312) is located near the nozzle (320) side of the spray pipe (300). The movable end (312) is threaded into the spray pipe (300), and the spiral baffle (310) is configured to increase or decrease the pitch of the spiral channel (316) within the spray pipe (300) when the movable end (312) moves spirally relative to the spray pipe (300); and / or, The fixed end (311) is slidably disposed within the spraying pipe (300) along the axial direction of the spraying pipe (300). The spraying pipe (300) is provided with an operation hole (330) at the corresponding position of the fixed end (311). An auxiliary material tank (500) is connected to the operation hole (330). The auxiliary material tank (500) is used to store auxiliary material solution. The auxiliary material tank (500) is configured to push the fixed end (311) to slide towards the movable end (312) when the auxiliary material tank (500) is connected to the operation hole (330), so as to reduce the pitch of the spiral channel (316).

7. The hydroseeding device according to claim 6, characterized in that, The auxiliary material tank (500) includes a mounting part (510) for threaded engagement with the spray pipe (300) to allow the auxiliary material tank (500) to communicate with the spray pipe (300); The mounting part (510) is configured to, when the mounting part (510) rotates relative to the spray pipe (300), at least partially extend into the spray pipe (300) and abut against the fixed end (311), and push the fixed end (311) to slide toward the movable end (312).

8. The hydroseeding device according to claim 6, characterized in that, The auxiliary material tank (500) is provided with a jet pipe (520), which is configured to spray air into the auxiliary material solution within the auxiliary material tank (500) to agitate the auxiliary material solution and increase the pressure within the auxiliary material tank (500); and / or, The fixed end (311) is provided with a first inclined surface (311a), and the mounting part (510) of the auxiliary material tank (500) is provided with a second inclined surface (511). The second inclined surface (511) is configured to cooperate with the first inclined surface (311a) when the mounting part (510) is inserted into the spray pipe (300) to push the fixed end (311) to slide relative to the spray pipe (300).

9. The hydroseeding device according to claim 8, characterized in that, The auxiliary material tank (500) is provided with a pressure relief port (530), the pressure relief flow rate of the pressure relief port (530) is less than the jet flow rate in the jet pipe (520); and / or, The color of the excipient solution is different from the color of the grass seed suspension, and the color depth of the excipient solution is greater than the color depth of the grass seed suspension.

10. A method for ecological slope protection hydroseeding, characterized in that, Includes the following steps: The slope surface to be constructed must be cleaned and leveled; Lay and fix a layer of protective netting on the treated slope; The hydroseeding device described in any one of claims 1 to 9 is used to spray grass seed suspension onto the slope surface that has been covered with netting to form a cover layer. Water the slope after spraying until the vegetation takes shape.

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