Oblique spraying type high-pressure spraying device

Abstract

The utility model relates to an inclined spraying type high-pressure spraying device which comprises a receiving chamber, an ejector and a mixer, the mixer is communicated with the receiving chamber, the ejector is obliquely installed and fixed on the mixer, the ejector is located below the mixer, and the mixer is located on the right side of the receiving chamber; the device is simple in structure and convenient to use, meanwhile, the engineering cost is reduced, the market competitiveness of the dry spraying mixing pile technology and the shallow soft base plate reinforcing treatment technology is improved, and the engineering application range of the two technologies is expanded.

Description

Technical Field

[0001] The utility model belongs to the technical field of soft soil foundation reinforcement construction machinery and equipment, and particularly relates to a curing agent powder oblique spraying high-pressure injection device used for dry spraying mixing piles and shallow soft soil foundation block reinforcement construction background. Background Art

[0002] Soft soil foundations are widely distributed in my country, especially in the areas of sea, lakes and rivers, where the foundation soil has high moisture content, large void ratio and high compressibility. For this type of soft soil foundation, land development requires a large number of soft soil foundation treatment projects. In the last century, Europe successfully developed dry spraying mixing pile technology and shallow soft base block reinforcement treatment technology, which used dry powder materials such as lime or cement to reinforce saturated soft soil or silt foundations. This technology can greatly improve the strength and bearing capacity of the reinforced foundation by virtue of the dual technical functions of water absorption and solidification improvement of the curing agent. The application of the above two technologies in civil engineering projects can achieve good soft foundation reinforcement treatment effects. However, the existing construction background mainly uses manually controlled pressure tanks, general oblique ejectors and feed pipeline equipment. During the construction process, powder unloading and oblique ejector operation are both manual and completely based on the experience of workers. Due to the differences in the skill levels and proficiency of construction workers, the powder feeding and spraying transportation often become non-uniform and unstable, which is particularly prone to blockage of the delivery pipeline of the curing material, resulting in discontinuity in the feeding, spraying and delivery of the curing agent powder in the dry spraying and mixing construction, and the amount of curing agent sprayed at the bottom of the construction drill is uneven and unstable, making it difficult to ensure the construction quality. The main reason for the above-mentioned technical defects is the unreasonable structural design of the oblique injector and the mixer, the poor stability and continuity of the curing agent powder injection, and the inability to provide sufficient pneumatic conveying capacity for the gas-solid two-phase flow. Due to the unreasonable structural design of the oblique powder injector, such as the placement of the working nozzle, the installation adjustment angle, and the structural design problems, the spatial structure and geometric size of the mixer result in the gas-solid two-phase flow being unable to be fully mixed and compressed to generate a gas-solid two-phase vortex, affecting the pneumatic conveying capacity of the curing agent powder, and even causing the delivery pipeline to be blocked. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an oblique spray type high pressure spray device.

[0004] The purpose of the utility model is achieved through the following technical solution. The oblique spray type high-pressure injection device includes a receiving chamber, an injector and a mixer. The mixer is connected to the receiving chamber, the injector is obliquely mounted and fixed on the mixer, and the injector is located below the mixer. The mixer is located on the right side of the receiving chamber.

[0005] Preferably, the injector comprises an injection pipe and a working nozzle, the working nozzle is fixedly connected to the injection pipe, the injection end face of the working nozzle is parallel to the cross section of the injection pipe and is lower than the inner wall of the mixing pipe of the mixer; a sleeve is provided on one side of the middle part of the mixing pipe of the mixer, the sleeve is arranged at an angle of 10° to 45° to the mixing pipe, the injection pipe is inserted into the middle pipe section of the mixing pipe, and is fixedly and sealedly connected to the mixing pipe.

[0006] Preferably, when the receiving chamber adopts a hexahedral structure, and the top of the receiving chamber is fixedly connected to the bottom port of the pressure material tank of the built-in vertical screw conveyor of the feeding unit; the mixer includes a shrinkage tube, a mixing tube and a diffusion tube connected in sequence, the shrinkage tube is connected to the circular through hole provided on the right side wall of the receiving chamber, and the diffusion tube is connected to the gas material conveying pipe; the mixer adopts a variable space of a reducing, equal diameter and expanding diameter structure, the diameter of the shrinkage tube changes from large to small and is truncated cone along the direction from the receiving chamber to the mixer, the diameter of the mixing tube is a constant inner diameter tube, and the diameter of the diffusion tube changes from small to large and is truncated cone along the direction from the receiving chamber to the mixer; and a pneumatic feed switch valve is installed on the left side of the midpoint of the mixing tube.

[0007] Preferably, when the bottom end of the pressure tank of the feeding unit is fixedly connected with the downwardly inclined horizontal screw conveyor, the receiving chamber of the transverse cylindrical structure is located in the space without spiral blades directly in front of the outer shell of the screw conveyor and is provided with a switch valve, the mixer comprises a shrinkage tube, a mixing tube and a diffusion tube connected in sequence, the shrinkage tube is connected to the circular through hole provided on the right side wall of the receiving chamber, and the diffusion tube is connected to the gas material conveying pipe; the mixer adopts a variable space of shrinking, equal diameter and expanding diameter structure, the diameter of the shrinkage tube changes from large to small and is truncated cone along the direction from the receiving chamber to the mixer, the diameter of the mixing tube is a tube of equal inner diameter, and the diameter of the diffusion tube changes from small to large and is truncated cone along the direction from the receiving chamber to the mixer; and a pneumatic feed switch valve is installed on the left side of the midpoint of the mixing tube.

[0008] Preferably, when the receiving chamber adopts a bent tube structure, a rotary feeder is installed at the bottom end of the pressure tank of the feeding unit, the rotary feeder is composed of a movable rotor and a fixed shell, and a switch valve is provided at the lower end of the rotary feeder. The mixer includes a shrinkage tube and a mixing tube connected in sequence, the shrinkage tube is connected to a circular through hole provided on the right side wall of the receiving chamber, and the mixing tube is connected to the gas material conveying pipe; the mixer adopts a variable space of a shrinking and equal diameter structure, the diameter of the shrinkage tube changes from large to small along the direction from the receiving chamber to the mixer and is truncated in a cone shape, the diameter of the mixing tube is a constant inner diameter tube, and a pneumatic feed switch valve is installed on the left side of the midpoint of the mixing tube.

[0009] Preferably, when the receiving chamber adopts a bull horn structure, the mixer includes a shrinkage tube, a mixing tube and a diffusion tube connected in sequence, the shrinkage tube is connected to a circular through hole provided on the right side wall of the receiving chamber, and the diffusion tube is connected to the gas material conveying pipe; the mixer adopts a variable space of a shrinking, equal diameter and expanding diameter structure, the diameter of the shrinkage tube changes from large to small and is truncated cone-shaped along the direction from the receiving chamber to the mixer, the diameter of the mixing tube is a constant inner diameter tube, and the diameter of the diffusion tube changes from small to large and is truncated cone-shaped along the direction from the receiving chamber to the mixer; and a pneumatic feed switch valve and a pneumatic discharge switch valve are installed on the left side of the midpoint of the mixing tube.

[0010] Preferably, the top of the receiving chamber is provided with a switch valve and a feed port in sequence from top to bottom, which are used for switching the powder feed channel and receiving the curing agent powder respectively; the gas conveying pipe is connected to the front end of the mixer and is used to continue to convey the gas-solid two-phase mixed vortex ejected by the mixer forward.

[0011] Beneficial technical effects of the utility model:

[0012] 1. The utility model has the advantages of being able to concentrate the injection energy of high-pressure gas to perform injection impact to achieve a good jet flow effect, which is conducive to mixing and compressing the high-pressure gas and curing agent powder to form a swirl, increasing the dynamic pressure to improve the pneumatic conveying capacity, reducing the pipeline pressure loss, and realizing the long-distance transportation of gas-solid two-phase fluid medium;

[0013] 2. Different from the equal-diameter mixer used in the prior art, the utility model forms a mixer by sequentially connecting a contraction tube, a mixing tube and a diffusion tube. The mixer adopts a combined tube structure of an inverted truncated cone tube, a cylindrical tube and a right truncated cone tube. Through the spatial structure change of contraction-equal diameter-expansion, and the optimization design of geometric dimensions, the initial non-uniform flow field of the gas-solid two-phase flow can be transformed into a later uniform flow field through mixing and compression, and a gas-solid two-phase vortex flow that is conducive to long-distance pneumatic transportation can be generated quickly;

[0014] 3. The oblique jet high-pressure injection device has a simple structure and is easy to use. At the same time, it also reduces engineering costs, improves the market competitiveness of dry jet mixing pile technology and shallow soft base plate reinforcement treatment technology, and expands the engineering application scope of the two technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a feeding unit and a high-pressure injection device according to Embodiment 1 of the present utility model;

[0016] Figure 2 This is a schematic structural diagram of a feeding unit and a high-pressure injection device according to a second embodiment of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of a feeding unit and a high-pressure injection device according to a third embodiment of the present utility model;

[0018] Figure 4 This is a schematic structural diagram of a feeding unit and a high-pressure injection device according to a fourth embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the combined structure of the receiving chamber and the oblique ejector of the first embodiment of the utility model.

[0020] Figure 6 This is a schematic diagram of the combined structure of the receiving chamber and the oblique ejector of the second embodiment of the utility model.

[0021] Figure 7 This is a schematic diagram of the combined structure of the receiving chamber and the oblique ejector of the third embodiment of the utility model.

[0022] Figure 8 This is a schematic diagram of the combined structure of the receiving chamber and the oblique injector of the fourth embodiment of the utility model.

[0023] The numbers in the accompanying drawings are respectively: 1, receiving chamber; 11, feed port; 12, switch valve; 13, circular through hole; 2, oblique injector; 21, injection pipe; 22, working nozzle; 3, mixer; 31, contraction tube; 32, mixing tube; 33, diffusion tube; 34, pneumatic feed switch valve; 35, pneumatic discharge switch valve; 36, rotary feeder; 37, movable rotor; 38, fixed shell; 39, casing; 81, pressure tank; 82, screw conveyor; 9, gas material conveying pipe. DETAILED DESCRIPTION

[0024] The utility model will be described in detail below in conjunction with the accompanying drawings: the utility model includes a receiving chamber 1, an ejector 2 and a mixer 3, the mixer 3 is connected to the receiving chamber 1, the ejector 2 is obliquely mounted and fixed on the mixer 3, and the ejector 2 is located below the mixer 3, and the mixer 3 is located on the right side of the receiving chamber 1.

[0025] The ejector 2 comprises an ejection pipe 21 and a working nozzle 22, the working nozzle 22 is connected and fixed to the ejection pipe 21, the ejection end face of the working nozzle 22 is parallel to the cross section of the ejection pipe 21 and is 5 mm to 20 mm lower than the inner wall of the mixing pipe 32 of the mixer 3; a sleeve 39 is provided on one side of the middle of the mixing pipe 32 of the mixer 3, and the sleeve 39 is arranged at an angle of 10° to 45° to the mixing pipe 32, the ejection pipe 21 is inserted into the middle pipe section of the mixing pipe 32, and is fixedly and sealedly connected to the mixing pipe 32.

[0026] Embodiment 1: As shown in the attached Figure 1 , 5As shown, when the receiving chamber 1 adopts a hexahedral structure, and the top of the receiving chamber 1 is fixedly connected to the bottom port of the pressure tank 81 of the built-in vertical screw conveyor 82 of the feeding unit; the mixer 3 includes a shrink tube 31, a mixing tube 32 and a diffusion tube 33 connected in sequence, the shrink tube 31 is connected to the circular through hole 13 provided on the right side wall of the receiving chamber 1, and the diffusion tube 33 is connected to the gas material conveying pipe 9; the mixer 3 adopts a variable space of a shrinking, equal diameter and expanding structure, the diameter of the shrink tube 31 changes from large to small along the direction from the receiving chamber 1 to the mixer 3 and is truncated, the shrinking cone angle of the truncated cone tube is 20°~45° and the inner diameter of the truncated cone tube is the same as the inner diameter of the equal inner diameter mixing tube 32, the diameter of the mixing tube 32 is an equal inner diameter tube, which adopts 30mm~45mm The inner diameter and length are not less than 600mm, the diameter of the diffusion tube 33 changes from small to large and is truncated cone-shaped along the direction from the receiving chamber 1 to the mixer 3, and its expansion cone angle is 2°~10°, and the front end outlet of the diffusion tube 33 is fixedly connected to the gas conveying pipe 9 with the same inner diameter; the inner diameter of the gas conveying pipe 9 is 40mm~60mm, which is used to continue to pneumatically convey the gas-solid two-phase mixed vortex ejected by the mixer 3 forward; and a pneumatic feed switch valve 34 and a pneumatic discharge switch valve 35 are installed on the left side of the midpoint of the mixing tube 32; the injection pipe 21 is obliquely sealed and inserted into the middle pipe section of the mixing tube 32 at an angle of 10°~45°, the working nozzle 22 is rotatably connected to the injection pipe 21, and the front end face of the working nozzle 22 is 5mm~18mm lower than the inner wall of the mixing tube 32.

[0027] Embodiment 2: As shown in the attached Figure 2 , 6As shown, when the bottom end of the pressure tank 81 of the feeding unit is fixedly connected with a downwardly inclined horizontal screw conveyor 82, the receiving chamber 1 of the transverse cylindrical tube structure is located in the space without spiral blades directly in front of the shell of the screw conveyor 82 and is provided with a switch valve 12, and the mixer 3 includes a shrink tube 31, a mixing tube 32 and a diffusion tube 33 connected in sequence, the shrink tube 31 is connected to the circular through hole 13 provided on the right side wall of the receiving chamber 1, and the diffusion tube 33 is connected to the gas material conveying pipe 9; the mixer 3 adopts a variable space of a shrinking, equal diameter and expanding structure, the diameter of the shrink tube 31 changes from large to small along the direction from the receiving chamber 1 to the mixer 3 and is truncated, the shrinkage cone angle of the shrink tube 31 is 18°~40° and the inner diameter of the truncated tube is the same as the inner diameter of the mixing tube 32, the diameter of the mixing tube 32 is an equal inner diameter tube, and the inner diameter of the mixing tube 32 is The diameter is selected to be 30mm-50mm and the length is not less than 500mm. The diameter of the diffusion tube 33 changes from small to large and is truncated in the direction from the receiving chamber 1 to the mixer 3; the inner diameter of the rear port of the diffusion tube 33 is the same as the inner diameter of the mixing tube 32, the expansion cone angle of the diffusion tube 33 is 2°-8°, and its front end face is fixedly connected to the gas delivery pipe 9 with the same inner diameter. The inner diameter of the gas delivery pipe 9 is 40mm-60mm, which is used to continue to pneumatically convey the gas-solid two-phase mixed vortex ejected from the mixer 3 forward; and a pneumatic feed switch valve 34 is installed on the left side of the midpoint of the mixing tube 32; the injection pipe 21 is obliquely sealed and inserted into the middle pipe section of the mixing tube 32 at an angle of 10°-40°, the working nozzle 22 is rotatably connected to the injection pipe 21, and the front end face of the working nozzle 22 is 5mm-20mm lower than the inner wall of the mixing tube 32;

[0028] Embodiment 3: As shown in the attached Figure 3 , 7As shown, when the receiving chamber 1 adopts a curved tube structure, a rotary feeder 36 is installed at the bottom end of the pressure tank 81 of the feeding unit. The rotary feeder 36 is composed of a movable rotor 37 and a fixed shell 38. A switch valve 12 is provided at the lower end of the rotary feeder 36. The rotary feeder 36 has the function of inputting curing agent powder into the curved tube receiving chamber 1; the mixer 3 includes a shrink tube 31 and a mixing tube 32 connected in sequence, the shrink tube 31 is connected to the circular through hole 13 provided on the right side wall of the receiving chamber 1, and the mixing tube 32 is connected to the gas material conveying pipe 9; the mixer 3 adopts a variable space of a reduced diameter and equal diameter structure, and the diameter of the shrink tube 31 changes from large to small and is circular along the direction from the receiving chamber 1 to the mixer 3. The shrinking cone angle of the shrinking tube 31 is 10° to 30°, and the inner diameter of the truncated cone is the same as the inner diameter of the mixing tube 32. The diameter of the mixing tube 32 is an equal inner diameter tube. The inner diameter of the mixing tube 32 is 30mm to 60mm and the length is not less than 860mm; and a pneumatic feed switch valve 34 is installed on the left side of the midpoint of the mixing tube 32; the oblique angle of the injection pipe 21 is 12° to 42°, the working nozzle 22 is rotatably connected to the injection pipe 21, and the front end face of the working nozzle 22 is 5mm to 20mm lower than the inner wall of the mixing tube 32; the mixing tube 32 is fixedly connected to the gas conveying pipe 9 with the same inner diameter, and the gas conveying pipe 9 is used to continue to pneumatically convey the gas-solid two-phase mixed vortex ejected by the mixer 3 forward.

[0029] Embodiment 4: As shown in the attached Figure 4 , 8As shown, when the receiving chamber 1 adopts a bull horn structure, the internal pressure value of the pressure tank 81 is set to 0.3MPa~0.7MPa, and the curing agent powder in the tank flows into the bull horn-shaped receiving chamber 1 under the pressure of the high-pressure gas, and is blocked by the pneumatic feed switch valve 34; the mixer 3 includes a shrink tube 31, a mixing tube 32 and a diffusion tube 33 connected in sequence, the shrink tube 31 is connected to the circular through hole 13 provided on the right side wall of the receiving chamber 1, and the diffusion tube 33 is connected to the gas material conveying pipe 9; the mixer 3 adopts a variable space of a shrinking, equal diameter and expanding structure, the diameter of the shrink tube 31 changes from large to small along the direction from the receiving chamber 1 to the mixer 3 and is truncated, the shrinking cone angle is 15°~45° and the closing inner diameter is the same as the inner diameter of the mixing tube 32, the mixing The diameter of the tube 32 is a tube of uniform inner diameter and adopts an inner diameter of 25mm to 40mm and a length of not less than 900mm; the diameter of the diffusion tube 33 increases from small to large along the direction from the receiving chamber 1 to the mixer 3 and is truncated; and a pneumatic feed switch valve 34 and a pneumatic discharge switch valve 35 are installed on the left side of the midpoint of the mixing tube 32; the distance between the two switch valves is not more than 250mm; the injection tube 21 is obliquely sealed and inserted into the middle pipe section of the mixing tube 32 at an angle of 12° to 38°, and the working nozzle 22 is rotatably connected to the injection tube 21; the rear end face of the diffusion tube 33 is fixedly connected to the mixing tube 32 with the same inner diameter, the inner diameter of the diffusion tube 33 gradually increases, and its expansion cone angle is 2° to 8°, and the front end face of the diffusion tube 33 is fixedly connected to the gas material conveying pipe 9 with the same inner diameter.

[0030] After the working nozzle 22 of the oblique-spray injection pipe 21 generates a high-pressure gas jet beam of 0.3MPa to 0.8MPa, it is obliquely sprayed into the mixing tube 32 in a continuous spraying manner. At the same time, a negative pressure zone is generated in the left pipe section of the mixing tube 32; and the intelligent controller 4 controls the opening and closing of the pneumatic feed switch valve 34 and the pneumatic discharge switch valve 35 in sequence and at a set frequency; specifically, during the construction process, the interval opening and closing time of the pneumatic feed switch valve 34 is set as follows: the opening time is set to 1S to 2S, and the closing time is set to 2S to 4S; and the pneumatic discharge switch valve 35, which is 150mm to 240mm apart, remains closed when the pneumatic feed switch valve 34 is opened; during the time when the pneumatic feed switch valve 34 remains closed, the pneumatic discharge switch valve 35 is opened and closed at the set frequency interval, and its opening and closing interval time is 0.3S to 0.4S. When the pneumatic feed switch valve 34 is opened, the curing agent powder will be pushed to the position of the pneumatic discharge switch valve 35 by the high-pressure gas in the tank, that is, the pipeline space between the two pneumatic switch valves is filled with curing agent powder. When the pneumatic feed switch valve 34 is closed and the pneumatic discharge switch valve 35 is frequently opened and closed, the curing agent powder between the two valves will be sucked into the front pipe section of the mixing tube 32 from the negative pressure area in the form of an induced flow, and mixed, compressed and fluidized therein to form a gas-solid two-phase mixed vortex, and then the gas-solid two-phase mixed vortex is input into the feeding channel of the construction equipment through the air material conveying pipe 9 by pneumatic conveying.

[0031] The top of the receiving chamber 1 is provided with a switch valve 12 and a feed port 11 in sequence from top to bottom, which are used for switching the powder feeding channel and receiving the curing agent powder respectively; the gas conveying pipe 9 is connected to the front end of the mixer 3 and is used to continue to convey the gas-solid two-phase mixed vortex ejected by the mixer 3 forward.

[0032] The solidifying materials that can be used by the high-pressure jetting device include powder materials: lime, cement, curing agent, fly ash, mineral powder, and granular materials: fine sand, medium sand and other dry materials; and this oblique jetting high-pressure jetting system is suitable for various dry jetting construction methods, including dry jetting mixing pile construction and shallow soft base plate reinforcement construction. The specific curing agent material can be selected according to the project requirements and foundation soil conditions.

[0033] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. An oblique-spray high-pressure spraying device, comprising a receiving chamber (1), an ejector (2) and a mixer (3), characterized in that: The mixer (3) is communicated with the receiving chamber (1); the injector (2) is obliquely mounted and fixed on the mixer (3); the injector (2) is located below the mixer (3); and the mixer (3) is located on the right side of the receiving chamber (1); the injector (2) comprises an injection pipe (21) and a working nozzle (22); the working nozzle (22) is connected and fixed to the injection pipe (21); the injection end surface of the working nozzle (22) is parallel to the cross section of the injection pipe (21) and is lower than the inner wall of the mixing pipe (32) of the mixer (3); a sleeve (39) is provided on one side of the middle part of the mixing pipe (32) of the mixer (3); the injection pipe (21) is inserted into the sleeve (39) of the mixing pipe (32) and is fixedly and sealedly connected to the mixing pipe (32).

2. The oblique spray type high pressure spraying device according to claim 1, characterized in that: The distance between the sleeve (39) and the mixing tube (32) is 10 o ~45 o Angle setting.

3. The oblique spray type high pressure spraying device according to claim 1, characterized in that: When the receiving chamber (1) adopts a hexahedral structure, and the top of the receiving chamber (1) is fixedly connected to the bottom port of a pressure tank (81) having a vertical screw conveyor (82) built into the feeding unit; the mixer (3) comprises a shrink tube (31), a mixing tube (32) and a diffusion tube (33) connected in sequence, the shrink tube (31) is connected to a circular through hole (13) provided on the right side wall of the receiving chamber (1), and the diffusion tube (33) is connected to the gas material conveying tube (9). The mixer (3) has a variable space with a reduced diameter, a constant diameter and an expanded diameter structure; the diameter of the contraction tube (31) changes from large to small and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3); the diameter of the mixing tube (32) is a tube with a constant inner diameter; the diameter of the diffusion tube (33) changes from small to large and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3); and a pneumatic feed switch valve (34) is installed on the left side of the midpoint of the mixing tube (32).

4. The oblique spray type high pressure spraying device according to claim 1, characterized in that: When the bottom end of the pressure tank (81) of the feeding unit is fixedly connected to a downwardly inclined horizontal screw conveyor (82), the receiving chamber (1) of the transverse cylindrical structure is located in the space without spiral blades directly in front of the shell of the screw conveyor (82) and is provided with a switch valve (12), and the mixer (3) comprises a shrink pipe (31), a mixing pipe (32) and a diffusion pipe (33) connected in sequence, the shrink pipe (31) is connected to a circular through hole (13) provided on the right side wall of the receiving chamber (1), and the diffusion pipe (33) is connected to the receiving chamber (1). The mixer (3) is connected to the gas material conveying pipe (9) by a diameter-reducing, equal-diameter and expanded-diameter structure. The diameter of the contraction tube (31) changes from large to small and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3). The diameter of the mixing tube (32) is a tube with a constant inner diameter. The diameter of the diffusion tube (33) changes from small to large and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3). A pneumatic feed switch valve (34) is installed on the left side of the midpoint of the mixing tube (32).

5. The oblique spray type high pressure spraying device according to claim 1, characterized in that: When the receiving chamber (1) adopts a bent tube structure, a rotary feeder (36) is installed at the bottom end of the pressure material tank (81) of the feeding unit, the rotary feeder (36) is composed of a movable rotor (37) and a fixed shell (38), and a switch valve (12) is provided at the lower end of the rotary feeder (36). The mixer (3) comprises a shrink tube (31) and a mixing tube (32) connected in sequence, the shrink tube (31) is connected to a circular through hole (13) provided on the right side wall of the receiving chamber (1), and the mixing tube (32) is connected to the gas material conveying pipe (9); the mixer (3) adopts a variable space of a shrinking diameter and a constant diameter structure, the diameter of the shrink tube (31) changes from large to small along the direction from the receiving chamber (1) to the mixer (3) and is in a truncated cone shape, the diameter of the mixing tube (32) is a tube with a constant inner diameter, and a pneumatic feed switch valve (34) is installed on the left side of the midpoint of the mixing tube (32).

6. The oblique spray type high pressure spraying device according to claim 1, characterized in that: When the receiving chamber (1) adopts a bull horn structure, the mixer (3) comprises a shrink tube (31), a mixing tube (32) and a diffusion tube (33) which are connected in sequence, the shrink tube (31) is connected to a circular through hole (13) provided on the right side wall of the receiving chamber (1), and the diffusion tube (33) is connected to a gas material conveying tube (9); the mixer (3) adopts a variable space with a reduced diameter, a constant diameter and an expanded diameter structure, the diameter of the shrink tube (31) changes from large to small and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3), the diameter of the mixing tube (32) is a tube with a constant inner diameter, and the diameter of the diffusion tube (33) changes from small to large and is in a truncated cone shape along the direction from the receiving chamber (1) to the mixer (3); and a pneumatic feed switch valve (34) and a pneumatic discharge switch valve (35) are installed on the left side of the midpoint of the mixing tube (32).

7. The oblique spray type high pressure spraying device according to claim 1, characterized in that: The top of the receiving chamber (1) is provided with a switch valve (12) and a feed port (11) in order from top to bottom, and are used for opening and closing the powder feeding channel and receiving the curing agent powder respectively; the gas material conveying pipe (9) is connected to the front end of the mixer (3) and is used for continuing to convey the gas-solid two-phase mixed vortex ejected from the mixer (3) forward.

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