A material spraying device and method for bare rock greening

Abstract

The present invention relates to the technical field of spraying equipment, and specifically relates to a material spraying device for bare rock greening, which includes a mixing mechanism. The mixing mechanism includes a mixing main pipe and a slurry feeding component. The mixing main pipe is sequentially provided with a feeding section, a mixing section, and a discharging section from one end to the other end. The slurry feeding component includes a slurry cavity surrounding the outside of the mixing section, a triggering unit arranged in the mixing section, and an execution unit arranged outside the mixing section and located in the slurry cavity. The mixing section is evenly distributed with slurry feeding holes. In the present invention, a pump is used to guide the substrate to pass through the mixing main pipe under a certain pressure. When the substrate passes through the mixing section of the mixing main pipe, the slurry feeding holes evenly distributed on the mixing section are intermittently opened and closed, so that the nutrient solution containing grass seeds in the slurry cavity surrounding the outside of the mixing section can be injected into the mixing section and evenly mixed with the substrate, so that the substrate is evenly mixed with the grass seeds, and the grass seed distribution on the bare rock after spraying is more uniform. The present invention also relates to a method for spraying materials for bare rock greening.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying equipment, and specifically relates to a material spraying device for bare rock greening. The present invention also relates to a method for spraying materials for bare rock greening. Background Art

[0002] When greening the slope of a bare rock, it is first necessary to clean the floating stones and sundries on the slope, then fix the protective net on the slope through anchor bolts, and finally carry out spraying construction on the slope so that planting and greening can be carried out on the slope to achieve the purpose of finally greening the slope.

[0003] The spraying technology is mainly based on the theories of engineering mechanics and biology, and uses a special spraying and mixing machine to mix substrates, nutrient solutions, grass seeds, etc. and then spray them on the slope. The substrate includes fertilizers, organic substances, water-retaining materials, and bonding materials, forming a hardened body with a nearly certain thickness and continuous voids, and then laying plants on the hardened body;

[0004] In the process of using existing spraying equipment, it is necessary to first mix the nutrient solution mixed with grass seeds with the substrate, and then spray the mixed mixture on the slope. Since the densities of grass seeds and the substrate are quite different, in practical applications, the grass seeds and the substrate are not evenly mixed, resulting in uneven vegetation growth on the subsequent slope.

[0005] Chinese Patent CN115119571B relates to a spraying device for soil and water conservation for ecological restoration in mining areas, which can ensure that the substrate for spraying is evenly mixed with grass seeds and improve the spraying and soil improvement effects; it includes: a mixing tank, a flow channel is penetrated through the mixing tank, the two ends of the flow channel are respectively communicated with a liquid inlet pipe and a liquid outlet pipe, a grass storage cavity is arranged in the middle of the mixing tank, injection chambers are arranged on both sides of the grass storage cavity, a pushing mechanism is movably installed inside each group of injection chambers, and both groups of injection chambers are communicated with the flow channel for injecting the fluid grass seeds inside the injection chambers into the flow channel; wherein, a communication port is communicated between the bottom of the grass storage cavity and the two groups of injection chambers, a check mechanism is arranged inside each group of communication ports, a funnel is fixedly arranged on the grass storage cavity, and a power mechanism is also arranged on the mixing tank for driving the two groups of pushing mechanisms to reciprocate and lift alternately along the axial direction inside the two groups of injection chambers.

[0006] When the substrate passes through the flow channel, the nutrient solution mixed with grass seeds is injected into the flow channel through the pushing mechanism. However, the nutrient solution mixed with grass seeds only contacts and mixes with the substrate at one point, which will cause uneven distribution of the nutrient solution in the substrate, and further cause uneven mixing of grass seeds and the substrate. Summary of the Invention

[0007] To solve the above problems, a material spraying device for bare rock greening is provided, which solves the problem of uneven distribution of grass seeds in the substrate by injecting the nutrient solution mixed with grass seeds into the substrate in a circular matrix.

[0008] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0009] A material spraying device for bare rock greening includes a mixing mechanism. The mixing mechanism includes a mixing main pipe and a slurry feeding component. The mixing main pipe is sequentially provided with a feeding section, a mixing section, and a discharging section from one end to the other end. The slurry feeding component includes a slurry cavity surrounding the outside of the mixing section, a triggering unit arranged in the mixing section, and an execution unit arranged outside the mixing section and located in the slurry cavity. The mixing section is evenly provided with slurry feeding holes. When the substrate passes through the mixing section, the triggering unit guides the execution unit to intermittently close the slurry feeding holes, so that the nutrient solution mixed with grass seeds in the slurry cavity surrounding the outside of the mixing section can be injected into the mixing section and uniformly mixed with the substrate;

[0010] At the connection between the feeding section and the mixing section, and at the connection between the mixing section and the discharging section, stepped grooves coaxial with them are provided. The execution unit includes a sliding sleeve, which is coaxially slidably arranged on the mixing section. The sliding sleeve is provided with slurry passing holes that can communicate the slurry cavity and the slurry feeding holes. The triggering unit includes a rotating ring, a guide vane, and a sliding pin. The rotating ring is coaxially rotatably arranged on the stepped groove. The end face of the rotating ring relative to the stepped groove is provided with continuously and spaced concave portions and convex portions. The guide vane is arranged between two rotating rings. The sliding pin axially penetrates the stepped groove along the mixing main pipe and is slidably matched with it. One end of the sliding pin abuts against the end face of the rotating ring relative to the stepped groove, and the other end of the sliding pin is connected to the sliding sleeve;

[0011] The execution unit further includes a fixing ring, which is coaxially fixed at both ends of the outer circumferential surface of the sliding sleeve. The triggering unit further includes a sliding ring, a connecting pin, and an elastic member. The sliding ring is coaxially slidably arranged on the outer circumferential surfaces of the feeding section and the discharging section. The elastic member is arranged on the feeding section and the discharging section and is connected to the sliding ring. The sliding ring makes the sliding pin elastically abut against the end face of the rotating ring relative to the stepped groove under the action of the elastic member. The connecting pin penetrates the inner wall of the slurry cavity and is slidably matched with it. Both ends of the connecting pin are respectively connected to the sliding ring and the fixing ring.

[0012] Preferably, the elastic member includes a positioning sleeve and a spring. The positioning sleeve is coaxially and fixedly arranged on the outer circumferential surfaces of the feeding section and the discharging section. A positioning ring is arranged at one end of the positioning sleeve facing the sliding ring. The spring is sleeved on the feeding section and the discharging section, and two ends of the spring respectively abut against the opposite ends of the positioning ring and the sliding ring.

[0013] Preferably, the triggering unit further includes a connecting ring and a positioning rod. The connecting ring is coaxially arranged at the opposite ends of the two rotating rings. The inner side of the connecting ring is a conical surface. The positioning rod is coaxially arranged in the mixing section. Two ends of the guiding vane are fixedly connected to the conical surface of the connecting ring, and the inner edge of the guiding vane is fixedly connected to the circumferential surface of the positioning rod.

[0014] A material spraying device for bare rock greening, characterized in that the slurry feeding assembly further includes a sealing cylinder and end rings. The sealing cylinder is coaxially arranged on the outer circumferential surface of the mixing section. A slurry replenishing pipe extending radially is arranged on the circumferential surface of the sealing cylinder. The end rings are coaxially arranged at both ends of the outer circumferential surface of the mixing section. The end rings are connected to both ends of the sealing cylinder. The inner circumferential surface of the sealing cylinder, the inner side of the end rings and the outer circumferential surface of the material passing section form a slurry cavity.

[0015] Preferably, the mixing main pipe includes a feeding pipe, a mixing pipe and a discharging pipe. The inner diameter of the mixing pipe is larger than the outer diameters of the feeding pipe and the discharging pipe. A first flange ring is arranged at one end of the feeding pipe facing the mixing pipe. The first flange ring is hermetically connected to one end of the mixing pipe. A second flange ring is arranged at one end of the discharging pipe facing the mixing pipe. The second flange ring is hermetically connected to the other end of the mixing pipe. The triggering unit is arranged between the first flange ring and the second flange ring.

[0016] Preferably, the spraying device further includes a pressurizing assembly for pressurizing the slurry cavity. The pressurizing assembly includes a gas blowing member and an expanding member. The gas blowing member is arranged outside the slurry cavity and is in transmission connection with the connecting pin. The gas blowing member has a gas blowing port. The expanding member is arranged in the slurry cavity. The expanding member is communicated with the gas blowing port. When the connecting pin slides, the gas blowing member blows gas to the expanding member to make it expand.

[0017] Preferably, the gas blowing member includes a shell cylinder and a piston. The shell cylinder is arranged outside the slurry cavity and is coaxial with the sliding pin. The piston is coaxially and fixedly arranged on the sliding pin. The gas blowing port is radially opened on the shell cylinder. The expanding member includes a hollow pipe and a rubber sleeve. The hollow pipe is arranged in the slurry cavity. One end of the hollow pipe is closed and the other end is communicated with the gas blowing port. Air holes communicated with the hollow inner cavity are opened on the hollow pipe. The rubber sleeve is sleeved on the hollow pipe. Two ends of the rubber sleeve are hermetically connected to the outer circumferential surface of the hollow pipe.

[0018] The present invention also relates to a method for spraying materials for bare rock greening, which includes the following steps: guiding the substrate through the mixing main pipe by a pump, so that when the substrate passes through the mixing section of the mixing main pipe, the nutrient solution mixed with grass seeds is evenly sprayed on the substrate, and then the materials mixed with the substrate, grass seeds and nutrient solution are sprayed on the bare rock through the discharging section of the mixing main pipe.

[0019] The beneficial effects of the present invention compared with the prior art are as follows:

[0020] In the present invention, the substrate is guided by a pump to pass through the mixing main pipe under a certain pressure, and when the substrate passes through the mixing section of the mixing main pipe, the slurry holes evenly distributed on the mixing section are intermittently opened and closed, so that the nutrient solution mixed with grass seeds in the slurry cavity surrounding the outer side of the mixing section can be injected into the mixing section and evenly mixed with the substrate, thereby making the substrate evenly mixed with grass seeds and making the grass seed distribution on the bare rock after spraying more uniform. Description of the Drawings

[0021] Figure 1 is a perspective view of a material spraying device for bare rock greening;

[0022] Figure 2 is a perspective sectional view of a material spraying device for bare rock greening;

[0023] Figure 3 is a sectional view of a material spraying device for bare rock greening;

[0024] Figure 4 is Figure 3 a partial enlarged view of part A of

[0025] Figure 5 is Figure 3 a partial enlarged view of part B of

[0026] Figure 6 is a perspective view of the mixing main pipe in a material spraying device for bare rock greening;

[0027] Figure 7 is a partial perspective exploded view of the mixing main pipe in a material spraying device for bare rock greening;

[0028] Figure 8 is a perspective view of the guide vane, connecting ring and rotating ring in a material spraying device for bare rock greening;

[0029] Figure 9 is Figure 8 a partial enlarged view of part C of

[0030] Figure 10 is a perspective exploded view of the guide vane, connecting ring and rotating ring in a material spraying device for bare rock greening.

[0031] The reference numerals in the figure are as follows:

[0032] 11 - Feed section;

[0033] 12 - Mixing section;

[0034] 121 - Slurry feeding hole;

[0035] 13 - Discharge section;

[0036] 111 - First flange ring;

[0037] 131 - Second flange ring;

[0038] 21 - Trigger unit;

[0039] 211 - Rotating ring;

[0040] 2111 - Protrusion;

[0041] 2112 - Recess;

[0042] 212 - Guide vane;

[0043] 213 - Sliding pin;

[0044] 214 - Sliding ring;

[0045] 215 - Connecting pin;

[0046] 216 - Positioning sleeve;

[0047] 2161 - Positioning ring;

[0048] 217 - Spring;

[0049] 218 - Connecting ring;

[0050] 219 - Positioning rod;

[0051] 22 - Execution unit;

[0052] 221 - Sliding sleeve;

[0053] 2211 - Slurry passing hole;

[0054] 222 - Fixed ring;

[0055] 23 - Sealing cylinder;

[0056] 231 - Slurry replenishing pipe;

[0057] 24 - End ring;

[0058] 31 - Air blowing part;

[0059] 31 - Shell cylinder;

[0060] 312 - Piston;

[0061] 32 - Expansion member;

[0062] 321 - Hollow tube;

[0063] 3211 - Air hole;

[0064] 322 - Rubber sleeve. Detailed implementation manner

[0065] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0066] As Figure 1 , Figure 2 and Figure 3 shown, the present invention provides:

[0067] A material spraying device for bare rock greening, including a mixing mechanism. The mixing mechanism includes a mixing main pipe and a slurry feeding component. The mixing main pipe is sequentially provided with a feeding section 11, a mixing section 12, and a discharging section 13 from one end to the other end. The slurry feeding component includes a slurry cavity surrounding the outside of the mixing section 12, a triggering unit 21 arranged in the mixing section 12, and an executing unit 22 arranged outside the mixing section 12 and located in the slurry cavity. The mixing section 12 is evenly provided with slurry feeding holes 121. When the substrate passes through the mixing section 12, the triggering unit 21 guides the executing unit 22 to intermittently close the slurry feeding holes 121.

[0068] The substrate includes fertilizers, organic substances, water retention materials, and binding materials, and can form a hardened body with a nearly certain thickness and continuous voids. The substrate is pumped into the mixing main pipe by a pump, and the substrate is mixed with the nutrient solution containing grass seeds in the mixing main pipe and then sprayed out.

[0069] Under the guiding action of the pump, the substrate sequentially passes through the feeding section 11, the mixing section 12, and the discharging section 13 of the mixing main pipe. Since the triggering unit 21 of the slurry feeding component is arranged in the mixing section 12, the slurry feeding holes 121 on the mixing section 12 are intermittently opened and closed by the executing unit 22 of the slurry feeding component. Furthermore, the nutrient solution containing grass seeds in the slurry cavity surrounding the mixing section 12 can be intermittently injected into the mixing section 12 through the slurry feeding holes 121, so that the grass seeds can be evenly mixed in the substrate.

[0070] In this embodiment, a pump is used to guide the substrate to pass through the mixing main pipe under a certain pressure. When the substrate passes through the mixing section 12 of the mixing main pipe, the slurry feeding holes 121 evenly distributed on the mixing section 12 open and close intermittently, so that the nutrient solution mixed with grass seeds in the slurry chamber surrounding the outer side of the mixing section 12 can be injected into the mixing section 12 and uniformly mixed with the substrate, thereby enabling the substrate to be evenly mixed with grass seeds and making the grass seed distribution on the bare rock more uniform after spraying and sowing.

[0071] As Figure 3 , Figure 8 and Figure 9 shown, stepped grooves coaxial with them are provided at the joints of the feeding section 11 and the mixing section 12, and at the joints of the mixing section 12 and the discharging section 13. The actuating unit 22 includes a sliding sleeve 221 which is coaxially and slidably arranged on the mixing section 12. A slurry passing hole 2211 communicating with the slurry chamber and the slurry feeding hole 121 is provided on the sliding sleeve 221. The triggering unit 21 includes a rotating ring 211, a guide vane 212 and a sliding pin 213. The rotating ring 211 is coaxially rotatably arranged on the stepped groove. Concave portions 2112 and convex portions 2111 which are continuous and distributed at intervals are provided on the end face of the rotating ring 211 relative to the stepped groove. The guide vane 212 is arranged between two rotating rings 211. The sliding pin 213 axially penetrates the stepped groove along the mixing main pipe and is in sliding fit with it. One end of the sliding pin 213 abuts against the end face of the rotating ring 211 relative to the stepped groove, and the other end of the sliding pin 213 is connected to the sliding sleeve 221.

[0072] Since the evenly distributed diversion vanes 212 are rotatably arranged at the stepped grooves at both ends of the mixing section 12 through the rotating rings 211 at both ends, when the matrix passes through the mixing section 12 of the mixing main pipe, the base acts on the diversion vanes 212 along the length direction of the mixing section 12. Under the action of the matrix, the diversion vanes 212 will drive the rotating rings 211 to slide on the stepped grooves. Since the rotating rings 211 are provided with continuously and spaced concave portions 2112 and convex portions 2111 relative to the ends of the stepped grooves, and the sliding pins 213 always abut against the end faces of the rotating rings 211, when the rotating rings 211 rotate, the sliding pins 213 can slide on the stepped grooves to generate variables. The other ends of the sliding pins 213 are connected to the sliding sleeves 221, so that when the sliding pins 213 move axially along the mixing section 12, the sliding sleeves 221 can also slide on the outer circumferential surface of the mixing section 12. When the slurry passing holes 2211 on the sliding sleeves 221 correspond to the slurry feeding holes 121 on the mixing cavity, the nutrient solution mixed with grass seeds in the slurry cavity can pass through the slurry passing holes 2211 and the slurry feeding holes 121 in sequence and be injected into the mixing section 12, so that the grass seeds can be mixed with the matrix in the mixing section 12; when the slurry passing holes 2211 on the sliding sleeves 221 are staggered with the slurry feeding holes 121 on the mixing cavity, the slurry feeding holes 121 are closed, so that the grass seeds in the slurry cavity can intermittently pass through the slurry feeding holes 121, thereby evenly mixing the matrix and the grass seeds.

[0073] At the same time, since the diversion vanes 212 can divert the matrix, the uniformity of the grass seeds in the matrix is further improved.

[0074] As Figure 3 and Figure 4 shown, the execution unit 22 further includes a fixing ring 222. The fixing ring 222 is coaxially and fixedly arranged at both ends of the outer circumferential surface of the sliding sleeve 221. The trigger unit 21 further includes a sliding ring 214, a connecting pin 215 and an elastic member. The sliding ring 214 is coaxially slidably arranged on the outer circumferential surfaces of the feeding section 11 and the discharging section 13; the elastic member is arranged on the feeding section 11 and the discharging section 13 and connected to the sliding ring 214. Under the action of the elastic member, the sliding ring 214 makes the sliding pins 213 elastically abut against the end faces of the rotating rings 211 relative to the stepped grooves; the connecting pin 215 penetrates through the inner wall of the slurry cavity and is slidably matched with it. Both ends of the connecting pin 215 are respectively connected to the sliding ring 214 and the fixing ring 222.

[0075] By coaxially arranging the fixed rings 222 at both ends of the sliding sleeve 221, when the fixed rings 222 are pushed, the sliding sleeve 221 can move on the mixing section 12 of the mixing main pipe. And by the connecting pin 215 passing through the side wall of the slurry chamber and being slidably fitted therewith, when the connecting pin 215 slides, the fixed ring 222 connected thereto can slide. The sliding ring 214 is slidably arranged on the feeding section 11 and the discharging section 13 of the mixing main pipe, so that when the sliding pin 213 connected to the sliding ring 214 reciprocates, the connecting pin 215 connected to the sliding ring 214 can reciprocate, thereby linking the sliding pin 213 and the sliding sleeve 221 to realize the opening and closing of the slurry feeding hole 121.

[0076] As Figure 4 shown, the elastic member includes a positioning sleeve 216 and a spring 217. The positioning sleeve 216 is coaxially and fixedly arranged on the outer circumferential surfaces of the feeding section 11 and the discharging section 13. One end of the positioning sleeve 216 facing the sliding ring 214 is provided with a positioning ring 2161. The spring 217 is sleeved on the feeding section 11 and the discharging section 13, and both ends of the spring 217 respectively abut against the opposite ends of the positioning ring 2161 and the sliding ring 214.

[0077] By coaxially and fixedly arranging the positioning sleeve 216 on the feeding section 11 and the discharging section 13 of the mixing main pipe and arranging the spring 217 between the sliding ring 214 and the positioning ring 2161, under the action of the spring 217, the sliding pin 213 connected to the sliding ring 214 can elastically abut against one end of the rotating ring 211. When the rotating ring 211 rotates, one end of the sliding pin 213 can slide in the concave portion 2112 or the convex portion 2111 at the end of the rotating ring 211, thereby enabling the sliding pin 213 to generate a variable along its axial direction, and further enabling the sliding sleeve 221 to reciprocally slide on the mixing section 12 of the mixing main pipe.

[0078] As Figure 5 and Figure 8 shown, the trigger unit 21 further includes a connecting ring 218 and a positioning rod 219. The connecting ring 218 is coaxially arranged at the opposite ends of the two rotating rings 211. The inner side of the connecting ring 218 is a conical surface. The positioning rod 219 is coaxially arranged in the mixing section 12. Both ends of the guiding vane 212 are fixedly connected to the conical surface of the connecting ring 218, and the inner edge of the guiding vane 212 is fixedly connected to the circumferential surface of the positioning rod 219.

[0079] To enable the diversion vane 212 to be evenly and stably arranged between the two rotating rings 211, a connecting ring 218 is arranged at the opposite ends of the two rotating rings 211. Meanwhile, a positioning rod 219 is coaxially arranged in the mixing section 12. The two ends of the diversion vane 212 are connected to the two connecting rings 218, and the inner edge of the diversion vane 212 is connected to the positioning rod 219, thereby improving the stability of the diversion vane 212 and enabling the matrix to stably drive the diversion vane 212 to rotate during the flow process.

[0080] To enable the matrix to stably pass through the mixing end, the inner side of the connecting ring 218 is in a conical surface, thereby ensuring that the matrix can stably and evenly pass through the mixing section 12.

[0081] As Figure 3 shown, the slurry feeding assembly further includes a sealing cylinder 23 and end rings 24. The sealing cylinder 23 is coaxially arranged on the outer circumferential surface of the mixing section 12. A slurry replenishing pipe 231 extending radially along its circumferential surface is arranged on the circumferential surface of the sealing cylinder 23. The end rings 24 are coaxially arranged at both ends of the outer circumferential surface of the mixing section 12. The end rings 24 are connected to both ends of the sealing cylinder 23. The inner circumferential surface of the sealing cylinder 23, the inner side of the end rings 24, and the outer circumferential surface of the material passing section form a slurry cavity.

[0082] To form an annular slurry cavity outside the mixing section 12 of the mixing main pipe, the sealing cylinder 23 is coaxially arranged outside the mixing main pipe. The two end ports of the sealing cylinder 23 are sealed with both ends of the mixing section 12 through the end rings 24, thereby enabling a slurry cavity to be formed outside the mixing section 12.

[0083] The nutrient solution mixed with grass seeds can be replenished into the slurry cavity through the slurry replenishing pipe 231, so that the liquid level height of the nutrient solution in the slurry cavity is always higher than the slurry feeding holes 121 at the topmost end of the mixing section 12, thereby ensuring that the grass seeds can pass through the evenly distributed slurry feeding holes 121 and be mixed with the matrix.

[0084] As Figure 6 and Figure 7 shown, the mixing main pipe includes a feeding pipe, a mixing pipe, and a discharging pipe. The inner diameter of the mixing pipe is larger than the outer diameters of the feeding pipe and the discharging pipe. A first flange ring 111 is arranged at one end of the feeding pipe facing the mixing pipe. The first flange ring 111 is sealingly connected to one end of the mixing pipe. A second flange ring 131 is arranged at one end of the discharging pipe facing the mixing pipe. The second flange ring 131 is sealingly connected to the other end of the mixing pipe. The triggering unit 21 is arranged between the first flange ring 111 and the second flange ring 131.

[0085] To ensure that the substrate can stably pass through the mixing main pipe, the mixing main pipe is composed of a feeding pipe, a mixing pipe, and a discharging pipe. Since the diameter of the mixing pipe is larger than that of the feeding pipe and the discharging pipe, according to the Venturi effect, the flow rate of the substrate in the mixing pipe is smaller than that in the feeding pipe and the discharging pipe. Thus, the mixing time of the substrate and the grass seeds in the mixing pipe can be increased, and the uniformity of the grass seeds can be further improved. The first flange ring 111 and the second flange ring 131 can effectively prevent the material from overflowing outward from the connection part.

[0086] As Figure 4 shown, the spraying device further includes a pressurizing component for pressurizing the slurry cavity. The pressurizing component includes a gas-blowing part 31 and an expanding part 32. The gas-blowing part 31 is arranged outside the slurry cavity and is in transmission connection with the connecting pin 215. The gas-blowing part 31 has a gas-blowing port. The expanding part 32 is arranged in the slurry cavity. The expanding part 32 is communicated with the gas-blowing port. When the connecting pin 215 slides, the gas-blowing part 31 blows air into the expanding part 32 to make it expand.

[0087] When the substrate passes through the mixing section 12 of the mixing main pipe, the connecting pin 215 slides and the gas-blowing part 31 blows air into the expanding part 32, so that the expanding part 32 nozzles in the slurry cavity, thereby reducing the actual volume of the slurry cavity, increasing the pressure in the slurry cavity, and accelerating the grass seeds to pass through the slurry feeding holes 121 to be mixed with the substrate.

[0088] As Figure 4 and Figure 5 shown, the gas-blowing part 31 includes a shell cylinder 311 and a piston 312. The shell cylinder 311 is arranged outside the slurry cavity and is coaxial with the sliding pin 213. The piston 312 is coaxially and fixedly arranged on the sliding pin 213. The gas-blowing port is radially opened on the shell cylinder 311. The expanding part 32 includes a hollow tube 321 and a rubber sleeve 322. One end of the hollow tube 321 arranged in the slurry cavity is closed and the other end is communicated with the gas-blowing port. The hollow tube 321 is provided with air holes 3211 communicated with its hollow inner cavity. The rubber sleeve 322 is sleeved on the hollow tube 321. The two ends of the rubber sleeve 322 are hermetically connected to the outer circumferential surface of the hollow tube 321.

[0089] When the connecting pin 215 drives the piston 312 to slide in the shell cylinder 311, the air at one end of the piston 312 is compressed and then is pressed into the hollow tube 321 through the gas-blowing port. Since the hollow tube 321 is provided with air holes 3211, the rubber sleeve 322 sleeved on the hollow tube 321 expands to increase the pressure in the slurry cavity, thereby accelerating the mixing of the grass seeds and the substrate.

[0090] A method for spraying materials for bare rock greening includes the following steps: guiding the substrate through the mixing main pipe by a pump, so that when the substrate passes through the mixing section 12 of the mixing main pipe, the nutrient solution mixed with grass seeds is evenly sprayed on the substrate, and then the material mixed with the substrate, grass seeds and nutrient solution is sprayed on the bare rock through the discharging section 13 of the mixing main pipe.

[0091] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A material spraying device for bare rock greening, characterized in that, It includes a mixing mechanism, and the mixing mechanism includes a mixing main pipe and a slurry feeding component. The mixing main pipe is sequentially provided with a feeding section (11), a mixing section (12), and a discharging section (13) from one end to the other end. The slurry feeding component includes a slurry cavity surrounding the outer side of the mixing section (12), a triggering unit (21) arranged in the mixing section (12), and an executing unit (22) arranged outside the mixing section (12) and located in the slurry cavity. The mixing section (12) is evenly distributed with slurry feeding holes (121). When the matrix passes through the mixing section (12), the triggering unit (21) guides the executing unit (22) to intermittently close the slurry feeding holes (121), so that the nutrient solution mixed with grass seeds in the slurry cavity surrounding the outer side of the mixing section (12) can be injected into the mixing section (12) and be evenly mixed with the matrix; At the joints of the feeding section (11) and the mixing section (12), and the joints of the mixing section (12) and the discharging section (13), stepped grooves coaxial with them are provided. The executing unit (22) includes a sliding sleeve (221), and the sliding sleeve (221) is coaxially and slidably arranged on the mixing section (12). The sliding sleeve (221) is provided with a slurry passing hole (2211) that can communicate the slurry cavity and the slurry feeding hole (121). The triggering unit (21) includes a rotating ring (211), a guiding vane (212), and a sliding pin (213). The rotating ring (211) is coaxially rotatably arranged on the stepped groove. The end face of the rotating ring (211) relative to the stepped groove is provided with continuously and spaced concave portions (2112) and convex portions (2111). The guiding vane (212) is arranged between two rotating rings (211). The sliding pin (213) axially penetrates the stepped groove along the mixing main pipe and is slidably matched with it. One end of the sliding pin (213) abuts against the end face of the rotating ring (211) relative to the stepped groove, and the other end of the sliding pin (213) is connected to the sliding sleeve (221); The executing unit (22) further includes a fixing ring (222). The fixing ring (222) is coaxially fixed at both ends of the outer circumferential surface of the sliding sleeve (221). The triggering unit (21) further includes a sliding ring (214), a connecting pin (215), and an elastic member. The sliding ring (214) is coaxially slidably arranged on the outer circumferential surfaces of the feeding section (11) and the discharging section (13). The elastic member is arranged on the feeding section (11) and the discharging section (13) and is connected to the sliding ring (214). The sliding ring (214) makes the sliding pin (213) elastically abut against the end face of the rotating ring (211) relative to the stepped groove under the action of the elastic member. The connecting pin (215) penetrates the inner wall of the slurry cavity and is slidably matched with it. Both ends of the connecting pin (215) are respectively connected to the sliding ring (214) and the fixing ring (222).

2. The material spraying device for bare rock greening according to claim 1, characterized in that, The elastic member includes a positioning sleeve (216) and a spring (217). The positioning sleeve (216) is coaxially and fixedly arranged on the outer circumferential surfaces of the feeding section (11) and the discharging section (13). A positioning ring (2161) is arranged at one end of the positioning sleeve (216) facing the sliding ring (214). The spring (217) is sleeved on the feeding section (11) and the discharging section (13), and two ends of the spring (217) respectively abut against the opposite ends of the positioning ring (2161) and the sliding ring (214).

3. The material spraying device for bare rock greening according to claim 1 or 2, characterized in that, The triggering unit (21) further includes a connecting ring (218) and a positioning rod (219). The connecting ring (218) is coaxially arranged at the opposite ends of the two rotating rings (211). The inner side of the connecting ring (218) is a conical surface. The positioning rod (219) is coaxially arranged in the mixing section (12). Two ends of the guiding vane (212) are fixedly connected to the conical surface of the connecting ring (218), and the inner edge of the guiding vane (212) is fixedly connected to the circumferential surface of the positioning rod (219).

4. The material spraying device for bare rock greening according to claim 1 or 2, characterized in that, The slurry feeding assembly further includes a sealing cylinder (23) and end rings (24). The sealing cylinder (23) is coaxially arranged on the outer circumferential surface of the mixing section (12). A slurry replenishing pipe (231) extending radially is arranged on the circumferential surface of the sealing cylinder (23). The end rings (24) are coaxially arranged at two ends of the outer circumferential surface of the mixing section (12), and the end rings (24) are connected to two ends of the sealing cylinder (23). The inner circumferential surface of the sealing cylinder (23), the inner sides of the end rings (24), and the outer circumferential surface of the material passing section form a slurry cavity.

5. The material spraying device for bare rock greening according to claim 1 or 2, characterized in that, The mixing main pipe includes a feeding pipe, a mixing pipe, and a discharging pipe. The inner diameter of the mixing pipe is larger than the outer diameters of the feeding pipe and the discharging pipe. A first flange ring (111) is arranged at one end of the feeding pipe facing the mixing pipe, and the first flange ring (111) is hermetically connected to one end of the mixing pipe. A second flange ring (131) is arranged at one end of the discharging pipe facing the mixing pipe, and the second flange ring (131) is hermetically connected to the other end of the mixing pipe. The triggering unit (21) is arranged between the first flange ring (111) and the second flange ring (131).

6. The material spraying device for bare rock greening according to claim 1 or 2, characterized in that, The spraying device further includes a pressurizing assembly for pressurizing the slurry cavity. The pressurizing assembly includes a gas blowing member (31) and an expanding member (32). The gas blowing member (31) is arranged outside the slurry cavity and is in transmission connection with the connecting pin (215). The gas blowing member (31) has a gas blowing port. The expanding member (32) is arranged in the slurry cavity, and the expanding member (32) is communicated with the gas blowing port. When the connecting pin (215) slides, the gas blowing member (31) blows gas into the expanding member (32) to expand it.

7. The material spraying device for bare rock greening according to claim 6, characterized in that, The air-blowing member (31) includes a shell cylinder and a piston (312). The shell cylinder is arranged outside the slurry chamber and coaxial with the sliding pin (213). The piston (312) is coaxially and fixedly arranged on the sliding pin (213), and an air-blowing port is radially formed in the shell cylinder. The expansion member (32) includes a hollow tube (321) and a rubber sleeve (322). One end of the hollow tube (321) arranged in the slurry chamber is closed, and the other end is communicated with the air-blowing port. An air hole (3211) communicated with the hollow inner cavity is formed in the hollow tube (321). The rubber sleeve (322) is sleeved on the hollow tube (321), and both ends of the rubber sleeve (322) are hermetically connected to the outer circumferential surface of the hollow tube (321).

8. A method for spraying materials for bare rock greening, characterized in that, Adopting a material spraying device for bare rock greening as described in claim 1, it includes the following steps: guiding the substrate through the mixing main pipe by a pump, so that when the substrate passes through the mixing section (12) of the mixing main pipe, the nutrient solution mixed with grass seeds is evenly sprayed on the substrate, and then the material mixed with the substrate, grass seeds and nutrient solution is sprayed on the bare rock through the discharging section (13) of the mixing main pipe.

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