High-pressure rotary spraying machine for cement mixing pile

Abstract

A high-pressure rotary spraying machine for a cement mixing pile comprises a rotating assembly, a spraying assembly, a pressurizing assembly, a drilling assembly and an engineering van, the rotating assembly is located in the drilling assembly, the spraying assembly is fixedly connected to a shell of the drilling assembly, and a pressing piece of the spraying assembly makes contact with a spline of the rotating assembly. A spraying opening of the grout spraying assembly extends out of the outer side of the outer shell, the pressurizing assembly is connected with the grout spraying assembly through a screw rod shell, and the pressurizing assembly pressurizes the grout spraying assembly through a screw rod. The spraying amount is increased in a soil loose area to complete guniting reinforcement of the area, cement paste is further pressurized through movement of the drilling assembly, the cement guniting efficiency is improved, and the construction quality and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the field of engineering construction equipment, in particular to a high-pressure rotary jetting machine for cement mixing piles. Background Art

[0002] The chain cement mixing pile machine provided by publication number CN201711102512.9 includes a drill rod, a driving machine, a bearing frame and a grouting machine; the drill rod includes a drill bit and a rod body; the rod body is formed by splicing a transmission column end to end; a transmission hole is provided on the axis of the transmission column, each of the transmission columns is stringed on the bearing tube, and the transmission column can slide freely on the bearing tube; one end of the bearing tube is connected to the drill bit, and the other end is connected to the grouting machine; a driving tooth is provided on the outer cylindrical surface of each of the transmission columns, the driving tooth is meshed with the upper driving wheel of the driving machine, and the driving tooth can move relative to the driving wheel along the axial direction of the transmission column; the bearing frame includes a lifting arm matching the bearing tube, and the bearing tube can move up and down under the traction of the lifting arm.

[0003] Although the above-mentioned prior art realizes the convenience of mixing and grouting, it is prone to uneven grouting and unsaturated grouting when dealing with complex underground soils, especially in soft areas and cavity areas of the soil, which reduces the quality of the piles and reduces the work efficiency at the construction site. Summary of the invention

[0004] The purpose of the present invention is to provide a high-pressure rotary jetting machine for cement mixing piles to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-pressure rotary jetting machine for cement mixing piles comprises a rotating assembly, a grouting assembly, a pressurizing assembly, a drilling assembly and an engineering vehicle, wherein the rotating assembly is located inside the drilling assembly, the grouting assembly is fixedly connected to an outer shell of the drilling assembly, a pressing sheet of the grouting assembly contacts a spline of the rotating assembly, a nozzle of the grouting assembly extends out of the outer shell, the pressurizing assembly is connected to the grouting assembly through a spiral rod shell, and the pressurizing assembly pressurizes the grouting assembly through the spiral rod.

[0007] Preferably, the spraying assembly includes a pressing plate, a pressure chamber, a spraying pipe, a pressure differential control valve, a baffle and a slurry transport pipe. The pressure chamber is slidably installed with a pressing plate toward the rotating assembly. The pressing plate isolates the inside of the pressure chamber from the outside. The pressure chamber is connected with the slurry transport pipe. The pressure chamber is fixedly connected to the outer shell. The pressure chamber is connected with the spraying pipe through the pressure differential control valve. A baffle is slidably installed at the end of the spraying pipe. The baffle has a protrusion that controls the opening and closing of the baffle at the mouth of the spraying pipe.

[0008] Preferably, the pressurizing assembly includes a screw rod shell, a screw rod, a transmission belt, a fixed frame, a transmission wheel, a bevel gear I, a transmission rod, a bevel gear II, a pulley I and a pulley II. The transmission belt is slidably mounted on the fixed frame, the transmission belt contacts the transmission wheel, a bevel gear I is fixed to the shaft end of the transmission wheel, a bevel gear II is fixed to one end of the transmission rod, and a pulley I is fixed to the other end, the bevel gear I is meshed with the bevel gear II, a pulley II is fixed to the end of the screw rod, the pulley I is connected to the pulley II by a belt, the executing end of the screw rod is located inside the screw rod shell, the inlet of the screw rod shell is connected to the slurry transport pipe, and the outlet is connected to the pressure chamber, the screw rod, the transmission rod and the transmission wheel are rotatably connected to the outer shell, and the fixed frame is fixedly connected to the outer shell.

[0009] Preferably, the drilling assembly includes a shell, blades, a driving rod, an opening and a pipe. The shell has a pointed end at the bottom and blades are fixedly mounted on the side. The number of blades is at least two. The shell slides into the driving rod at the upper part of the blades. The shell has openings at the transmission belt and the shotcrete pipe. The driving rod is fixedly connected to the pipe. The slurry transport pipe is connected to the pipe and slides inside the pipe. The number of pipes is the same as the number of slurry transport pipes and corresponds one to one. The driving rod is installed on an engineering vehicle.

[0010] Preferably, the rotating assembly includes a spline and a keyway, the spline is fixedly connected to the driving rod, the keyway is fixedly connected to the outer shell, the keyway is composed of a connecting rod and a ring to form a cage structure, the number of the connecting rods is at least 1, the protrusion of the keyway is slidably installed in the gap between the connecting rods and the height of the protrusion is greater than the thickness of the connecting rod, thereby ensuring that the protrusion extends out of the keyway side and contacts the pressing plate, and the length of the spline is smaller than the keyway.

[0011] Preferably, the driving rod is connected to an engineering vehicle on the ground, the housing is sealingly and slidably mounted on the driving rod, and the slurry transport pipe is sealingly and slidably mounted on the pipeline.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention senses and controls the amount of cement slurry sprayed by the spraying pipe and the movement of the drilling assembly through a pressure difference control valve, increases the spraying amount in a loose soil area to complete the spraying reinforcement of this area, further pressurizes the cement slurry through the movement of the drilling assembly, increases the efficiency of cement spraying, and improves the quality and efficiency of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0015] Figure 2 For the present invention Figure 1 Partial cross-sectional view of part A;

[0016] Figure 3 It is a schematic diagram of the structure of the spraying assembly of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the pressurizing component of the present invention;

[0018] Figure 5 It is a structural schematic diagram of the drilling assembly of the present invention;

[0019] Figure 6 It is a schematic diagram of the structure of the rotating assembly of the present invention;

[0020] In the figure: 1 rotating assembly, 11 spline, 111 protrusion, 12 keyway, 121 connecting rod, 13 ring, 2 shotcrete assembly, 21 pressing plate, 22 pressure chamber, 23 shotcrete pipe, 24 differential pressure control valve, 25 baffle, 251 protrusion, 26 slurry transport pipe, 3 pressurizing assembly, 31 screw rod housing, 32 screw rod, 33 transmission belt, 34 fixing frame, 35 transmission wheel, 36 bevel gear I, 37 transmission rod, 38 bevel gear II, 39 pulley I, 310 pulley II, 4 drilling assembly, 41 housing, 42 blade, 43 driving rod, 44 opening, 45 pipeline, 5 engineering vehicle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example:

[0023] See also Figures 1 to 6 , the present invention provides a technical solution:

[0024] A high-pressure rotary jetting machine for cement mixing piles comprises a rotating assembly 1, a grouting assembly 2, a pressurizing assembly 3, a drilling assembly 4 and an engineering vehicle 5. The rotating assembly 1 is located inside the drilling assembly 4. The rotating assembly 1 controls the drilling assembly 4 to rotate, rise and fall in the underground soil. The grouting assembly 2 is fixedly connected to the outer shell 41 of the drilling assembly 4. Figure 1 As shown, the pressing piece 21 of the shotcrete assembly 2 contacts the spline 11 of the rotating assembly 1. When the pressing piece 21 is pressed on the spline 11 by the mud in the pressure chamber 22, the shotcrete assembly 2 carries the drilling assembly 4 and moves up and down along with the driving rod 43. The shotcrete pipe 23 of the shotcrete assembly 2 extends out of the outer shell 41 for grouting the soil. Figure 2 As shown, the pressurizing assembly 3 is connected to the shotcrete assembly 2 via a screw rod housing 31 and the pressurizing assembly 3 pressurizes the shotcrete assembly 2 via a screw rod 32 to improve the efficiency of discharging cement slurry outward.

[0025] As a preferred embodiment, Figure 1 The engineering vehicle 5 is a simple structural diagram. The function of the engineering vehicle is to control the rotation, downward and upward movements of the drilling assembly 4. At the same time, the engineering vehicle 5 injects cement slurry into the drilling assembly 4. The combination of the engineering vehicle and the drilling assembly 4 is a conventional technical means and will not be elaborated here.

[0026] As a preferred embodiment, the spraying assembly 2 includes a pressing plate 21, a pressure chamber 22, a spraying pipe 23, a pressure difference control valve 24, a baffle 25 and a slurry transport pipe 26. The pressure chamber 22 is slidably mounted with the pressing plate 21 toward the rotating assembly 1. Figure 3 As shown, when there is pressure in the pressure chamber 22, the pressing plate 21 is pressed against the spline 41 under the action of the internal pressure, and the spray assembly 2 and the drilling assembly 4 are driven to move up and down along with the driving rod 43 through friction. When there is not enough pressure in the pressure chamber 22, the pressing plate 21 does not produce enough friction against the spline 41, and the pressing plate 21 isolates the inside of the pressure chamber 22 from the outside. The pressure chamber 22 is connected to the slurry transport pipe 26, and the cement slurry enters the pressure chamber 22 through the slurry transport pipe 26. The pressure chamber 22 is fixedly connected to the housing 41, and the pressure chamber 22 is connected to the spray pipe 23 through the pressure differential control valve 24. The pressure differential control valve 24 controls the spray pipe 23 according to the pressure of the cement slurry in the external soil. The size of the cement slurry flow rate passing through 23, when the cement slurry pressure in the external soil is small, the cement slurry flow rate is increased, when the cement slurry pressure in the external soil is in the normal range, the spraying pipe 23 is controlled to restore the normal flow rate, a baffle 25 is slidably installed at the end of the spraying pipe 23, and a protrusion 251 is provided on the baffle 25 to control the opening and closing of the baffle 25 at the mouth of the spraying pipe 23. During the downward exploration of the drilling component 4, the baffle 25 is moved up to block the mouth of the spraying pipe 23 under the action of the relative movement of the soil. During the upward movement of the drilling component 4, the baffle 25 moves down to open the mouth of the spraying pipe 23. The spraying component 2 serves as a connecting component that controls the movement of the housing 41 and other components along with the driving rod 43.

[0027] As a preferred embodiment, the pressurizing assembly 3 includes a screw rod housing 31, a screw rod 32, a transmission belt 33, a fixing frame 34, a transmission wheel 35, a bevel gear I 36, a transmission rod 37, a bevel gear II 38, a pulley I 39 and a pulley II 310. The transmission belt 33 is slidably mounted on the fixing frame 34. Figure 4As shown, during the process of the drilling assembly 4 going down and up, the transmission belt 33 rotates under the action of the relative movement of the soil, and the transmission belt 33 contacts the transmission wheel 35. A bevel gear I36 is fixed to the shaft end of the transmission wheel 35. A bevel gear II38 is fixed at one end of the transmission rod 37 and a pulley I39 is fixed at the other end. The bevel gear I36 meshes with the bevel gear II38. A pulley II310 is fixed at the end of the screw rod 32. The pulley I39 is connected to the pulley II310 through a belt, so that the movement of the shell 41 relative to the soil is converted into the rotation of the screw rod 32. The execution end of the screw rod 32 is located inside the screw rod shell 31. The inlet of the screw rod shell 31 is connected to the slurry transport pipe 26, and the outlet is connected to the pressure chamber 22. The screw rod 32 and the screw rod shell 31 constitute a screw pump to pressurize the cement slurry passing through, thereby increasing the pressure inside the pressure chamber 22. The screw rod 32, the transmission rod 37 and the transmission wheel 35 are rotatably connected to the shell 41, and the fixing frame 34 is fixedly connected to the shell 41.

[0028] As a preferred embodiment, the drilling assembly 4 includes a housing 41, a blade 42, a driving rod 43, an opening 44 and a pipe 45. The housing 41 has a tip at the bottom and a blade 42 fixedly mounted on the side. Figure 5 As shown, during the rotation of the drilling assembly 4, the blades 42 stir the surrounding soil. The number of blades 42 is at least two. The housing 41 slides on the upper part of the blades 42 and is embedded in the driving rod 43. When the pressure in the pressure chamber 22 is insufficient, the pressing plate 21 does not provide sufficient friction, and the housing 41, the pressurizing assembly 3 and the spraying assembly 2 do not rise with the driving rod 43, and continue to rotate and spray at the current position. The housing 41 has an opening 44 at the transmission belt 33 and the spraying pipe 23. The opening 44 provides space for the transmission belt 33 to contact the soil. A pipe 45 is fixedly connected to the driving rod 43. The pipe 45 transports the cement slurry prepared on the ground to the pressure chamber 22. The slurry transport pipe 26 is connected to the pipe 45 and slides inside the pipe 45. The number of pipes 45 is the same as the number of slurry transport pipes 26 and corresponds one to one. The driving rod 43 is installed on the engineering vehicle 5, the engineering vehicle 5 is fixed on the ground, and the driving rod 43 is controlled by the engineering vehicle 5.

[0029] As a preferred embodiment, the rotating assembly 1 includes a spline 11 and a keyway 12, and the spline 11 is fixedly connected to the driving rod 43, such as Figure 6 As shown, the keyway 12 is fixedly connected to the housing 41. The keyway 12 is composed of a connecting rod 121 and a ring 13 to form a cage-shaped structure. The number of connecting rods 121 is at least 100. The protrusion 111 of the keyway 12 is slidably installed in the gap between the connecting rods 121 and the height of the protrusion 111 is greater than the thickness of the connecting rod 121, thereby ensuring that the protrusion 111 extends out of the side of the keyway 12 and contacts the pressing piece 21. The length of the spline 11 is smaller than the keyway 12. The cooperation between the spline 11 and the keyway 12 ensures that the drilling assembly 4 always rotates with the driving rod 43. The length difference ensures that when the driving rod 43 is rising, the housing 41, the pressurizing assembly 3 and the spraying assembly 2 do not rise.

[0030] As a preferred embodiment, the driving rod 43 is connected to the engineering vehicle 5 on the ground, the housing 41 and the driving rod 43 are sealed and slidably installed, and the slurry transport pipe 26 and the pipeline 45 are sealed and slidably installed.

[0031] As a preferred embodiment, the housing 41 is not just a single thin wall, and the positions without parts can still be filled with materials to ensure the stability of the entire device.

[0032] As a preferred embodiment, the number of the rotating assembly 1 and the spraying assembly 2 can be more than one, and they can be increased and arranged according to display needs.

[0033] The working principle of the present invention is as follows: after the drilling assembly 4 rotates and probes to the bottom of the position where piling is required, the device rotates and moves upward and performs grouting in the process. The cement slurry prepared on the ground is transported downward to the pressure chamber 22 through the pipe 45, and a part of it enters the screw rod shell 31 on the way. Due to the relative movement between the drilling assembly 4 and the soil, the transmission belt 33 drives the screw rod 32 to rotate to pressurize the cement slurry in the screw rod shell 31. At this time, the pressure inside the pressure chamber 22 will be further increased, the pressing plate 21 presses the spline 11, and the drilling assembly 4 rises as a whole, completing the process of rotating the device upward and spraying. When spraying the loose soil part, due to the many gaps in the outside world, the spraying at the ordinary position The amount is not enough to block all the gaps, resulting in the cement slurry pressure in this area not being reached, and the differential pressure control valve 24 increases the opening of the shotcrete pipe 23, thereby increasing the amount of cement slurry sprayed in this area. At this time, the pressure in the pressure chamber 22 decreases due to the increase in the opening, and the pressing plate 21 cannot provide sufficient friction. The driving rod 43 continues to rise while the rotating component 1 and the shotcrete component 2 do not rise, and continue to spray in this area. After the gaps in this area are filled with cement slurry, the external pressure rises, and the differential pressure control valve 24 reduces the opening of the shotcrete pipe 23. The pressure inside the pressure chamber 22 rises, and the pressing plate 21 presses the spline 11 again to provide sufficient friction, and the drilling component 4 continues to rise with the driving rod 43.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure rotary jetting machine for cement mixing piles, comprising a rotating component (1), a grouting component (2), a pressurizing component (3), a drilling component (4) and an engineering vehicle (5), characterized in that: The rotating assembly (1) is located inside the drilling assembly (4); the shotcrete assembly (2) is fixedly connected to the outer shell (41) of the drilling assembly (4); the pressing sheet (21) of the shotcrete assembly (2) contacts the spline (11) of the rotating assembly (1); the shotcrete pipe (23) of the shotcrete assembly (2) extends out of the outer shell (41); the pressurizing assembly (3) is connected to the shotcrete assembly (2) via a screw rod shell (31); and the pressurizing assembly (3) pressurizes the shotcrete assembly (2) via a screw rod (32).

2. A high-pressure rotary jetting machine for cement mixing piles according to claim 1, characterized in that: The spraying assembly (2) comprises a pressing plate (21), a pressure chamber (22), a spraying pipe (23), a pressure difference control valve (24), a baffle (25) and a slurry transport pipe (26); the pressure chamber (22) is slidably mounted with a pressing plate (21) toward the rotating assembly (1); the pressing plate (21) isolates the inside of the pressure chamber (22) from the outside; the pressure chamber (22) is communicated with the slurry transport pipe (26); the pressure chamber (22) is fixedly connected to a housing (41); the pressure chamber (22) is communicated with the spraying pipe (23) via the pressure difference control valve (24); a baffle (25) is slidably mounted at the end of the spraying pipe (23); a protrusion (251) is provided on the baffle (25) to control the opening and closing of the baffle (25) at the mouth of the spraying pipe (23).

3. A high-pressure rotary jetting machine for cement mixing piles according to claim 2, characterized in that: The pressurizing assembly (3) comprises a screw rod housing (31), a screw rod (32), a transmission belt (33), a fixed frame (34), a transmission wheel (35), a bevel gear I (36), a transmission rod (37), a bevel gear II (38), a pulley I (39) and a pulley II (310), wherein the transmission belt (33) is slidably mounted on the fixed frame (34), wherein the transmission belt (33) contacts the transmission wheel (35), a bevel gear I (36) is fixed to an axial end of the transmission wheel (35), a bevel gear II (38) is fixed to one end of the transmission rod (37), and a pulley I (39) is fixed to the other end. 9), the bevel gear I (36) is meshed with the bevel gear II (38), a pulley II (310) is fixedly provided at the end of the screw rod (32), the pulley I (39) is connected to the pulley II (310) through a belt, the execution end of the screw rod (32) is located inside the screw rod housing (31), the inlet of the screw rod housing (31) is connected to the slurry transport pipe (26), and the outlet is connected to the pressure chamber (22), the screw rod (32), the transmission rod (37) and the transmission wheel (35) are rotatably connected to the housing (41), and the fixing frame (34) is fixedly connected to the housing (41).

4. A high-pressure rotary jetting machine for cement mixing piles according to claim 3, characterized in that: The drilling assembly (4) comprises a shell (41), a blade (42), a driving rod (43), an opening (44) and a pipe (45). The shell (41) has a tip at the bottom and a blade (42) fixedly mounted on the side. The number of the blades (42) is at least two. The upper part of the shell (41) is slidably embedded in the driving rod (43). The shell (41) has an opening (44) at the transmission belt (33) and the grouting pipe (23). The driving rod (43) is fixedly connected with the pipe (45). The slurry transport pipe (26) is connected to the pipe (45) and the slurry transport pipe (26) slides inside the pipe (45). The number of the pipes (45) is the same as the number of the slurry transport pipes (26) and corresponds one to one. The driving rod (43) is mounted on an engineering vehicle (5).

5. A high-pressure rotary jetting machine for cement mixing piles according to claim 4, characterized in that: The rotating assembly (1) comprises a spline (11) and a keyway (12), wherein the spline (11) is fixedly connected to a driving rod (43), and the keyway (12) is fixedly connected to a housing (41). The keyway (12) is composed of a connecting rod (121) and a ring (13) to form a cage-shaped structure, and there are at least two connecting rods (121). The protrusion (111) of the keyway (12) is slidably installed in the gap between the connecting rods (121) and the height of the protrusion (111) is greater than the thickness of the connecting rod (121), thereby ensuring that the protrusion (111) extends out of the keyway (12) side and contacts the pressing plate (21), and the length of the spline (11) is less than the keyway (12).

6. A high-pressure rotary jetting machine for cement mixing piles according to claim 5, characterized in that: The driving rod (43) is connected to the engineering vehicle (5) on the ground, the housing (41) and the driving rod (43) are sealed and slidably mounted, and the slurry transport pipe (26) and the pipeline (45) are sealed and slidably mounted.

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