Double-tube jet grouting equipment with positioning mechanism

Abstract

The invention relates to the technical field of foundation pit enclosure water stopping or foundation reinforcement construction, and discloses a double-tube rotary jet pile equipment with a positioning mechanism, comprising a cutting and stirring mechanism, wherein the cutting and stirring mechanism also comprises a drill pipe, an inner pipe is fixedly connected to the inner wall of the drill pipe, high-pressure cement slurry enters the inner pipe, squeezes a pressure plate 1, the pressure plate moves down, drives the conical rod to move down through a sliding rod and a connecting plate, opens a limit groove stuck by the conical rod, the pressure plate 1 descends, drives the connecting rod to descend a piston plate, hydraulic oil in a hydraulic pipe 1 flows back into a hydraulic box, drives a piston rod 1 and a partition 1 to rise, opens a hole on a telescopic cutter, and high-pressure gas enters the telescopic cutter through the hole to extend the telescopic cutter, so that the device rotates and sprays high-pressure cement slurry, and the telescopic cutter will rotate and rise to cut surrounding soil and gravel, so as to avoid that deep soil is relatively compact, cement slurry cannot be sprayed to a specified distance, and the solidified cement pile is wide at the top and narrow at the bottom, and has poor stability.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit enclosure water stopping or foundation reinforcement construction equipment, in particular to a double-tube jet grouting pile equipment with a positioning mechanism. Background Art

[0002] At present, underground engineering is developing rapidly. The methods used to develop and utilize underground space and build various underground buildings such as multi-story basements, subways, underground commercial streets, etc. include gravity-mixed pile retaining walls, underground continuous walls, pile-row retaining walls, etc. This must not only ensure the stability of the foundation pit and the safety and convenience of operations in the pit, but also control the displacement of the soil at the bottom of the pit and outside the pit within a certain range to ensure the normal use of adjacent buildings and municipal facilities. This makes the protection of deep foundation pits and foundation reinforcement more and more important in construction.

[0003] During the construction of the commonly used double-tube high-pressure rotary jet piles, due to the characteristics of high and compact deep soil pressure and low and loose shallow soil pressure, the double-tube rotary jet piles, when rotating and jetting up, have a closer distance for punching and cutting the deep soil and a longer distance for punching and cutting the shallow soil, making the solidified concrete piles appear wide at the top and narrow at the bottom, affecting the stability of the concrete piles and causing the overall foundation to be not strong enough. To address the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a double-tube rotary jet pile equipment with a positioning mechanism, including a cutting and stirring mechanism, the cutting and stirring mechanism also includes a drill pipe, an inner pipe is fixedly connected to the inner wall of the drill pipe, a telescopic cutter is fixedly connected to the inner wall of the drill pipe, and a drill bit is fixedly connected to the bottom of the drill pipe;

[0005] The anti-adhesion mechanism comprises a sliding plate slidably connected to the inner wall of the telescopic cutter, a second telescopic spring is fixedly connected to the outer wall of the sliding plate, and a sliding block is slidably connected to the inner wall of the telescopic cutter;

[0006] The anti-blocking mechanism includes a cement slurry nozzle fixedly connected to the inner wall of the drill pipe, a pressure plate 2 is slidably connected to the inner wall of the inner pipe, and a partition 2 is fixedly connected to the bottom of the pressure plate 2;

[0007] The positioning mechanism comprises a fixing ring rotatably connected to the outer wall of the drill pipe, a connecting block is fixedly connected to the outer wall of the fixing ring, a supporting pile is fixedly connected to the bottom of the connecting block, and a pile tip is fixedly connected to the bottom of the supporting pile.

[0008] Preferably, the cutting and stirring mechanism also includes a pressure plate slidably connected to the inner wall of the inner tube, the bottom of the pressure plate 1 is fixedly connected to a pressure spring 1, the bottom of the pressure plate 1 is fixedly connected to a connecting rod, the outer wall of the pressure plate 1 is fixedly connected to a sliding rod, the outer wall of the sliding rod is slidably connected to the inner wall of the inner tube, and the bottom of the inner tube is fixedly connected to a fixed block. By utilizing the above-mentioned characteristics, the telescopic cutter will continuously cut the surrounding soil and gravel when rotating and rising. When the drill pipe continuously rotates and rises, it will synchronously drive the telescopic cutter to rotate together, so that the telescopic cutter cuts the surrounding soil during continuous rotation, and due to the inclined design of the telescopic cutter, the telescopic cutter can While the cutting is rotating continuously, the ejected cement slurry is also continuously stirred. When the telescopic cutter is continuously stirring, the cement slurry can be fully mixed with the surrounding soil blocks, gravel and other impurities, so that the cement pile formed after solidification has the same hardness inside and outside. Because the density of gas is much lower than that of solid and liquid, when the telescopic cutter is continuously stirring and rising, the gas in the cement slurry can be discharged upward to the top of the cement slurry during the stirring and rising, avoiding the entry of some gas into the cement slurry during the high-pressure cement slurry rotary jetting and high-pressure gas injection, causing more holes formed by air bubbles inside the solidified cement pile, resulting in the cement pile being insufficiently hard and having poor stability.

[0009] Preferably, the cutting and stirring mechanism also includes a hydraulic box fixedly connected to the top of the fixed block, the outer wall of the hydraulic box is fixedly connected to the inner wall of the inner tube, the inner wall of the hydraulic box is slidably connected with a piston plate, the inner wall of the piston plate is fixedly connected to the outer wall of the connecting rod, a hydraulic pipe 1 is fixedly connected to the outer wall of the hydraulic box, a piston rod 1 is slidably connected to the inner wall of the hydraulic pipe 1, and a partition 1 is fixedly connected to the bottom of the piston rod 1. When the piston plate descends, a negative pressure state will be formed on the top of the piston plate. At this time, the hydraulic oil in the hydraulic pipe 1 will be affected by the negative pressure and flow back into the hydraulic box, and drive the piston rod 1 to move upward while the hydraulic oil flows back. When the piston rod 1 moves upward, it will drive the partition 1 to move upward together, so that the hole on the telescopic cutter that was originally blocked by the partition 1 is opened, so that the high-pressure gas can enter the telescopic cutter and make it extend completely outward.

[0010] Preferably, the cutting and stirring mechanism also includes a telescopic spring 1 fixedly connected to the inner wall of the telescopic cutter, the outer wall of the telescopic cutter is fixedly connected to the inner wall of the fixed block, the bottom of the sliding rod is fixedly connected to a connecting plate, the top of the connecting plate is fixedly connected to a conical rod, a limiting groove is provided on the inner wall of the telescopic cutter, and an air flow nozzle is fixedly connected to the inner wall of the drill pipe. The characteristic that the pressure plate 1 will be pressed down during the pouring of high-pressure cement slurry is utilized. When the high-pressure cement slurry enters the inner tube, it will squeeze the pressure plate 1 downward to shrink it downward. When the pressure plate 1 moves downward, the conical rod is driven downward by the sliding rod and the connecting plate, so that the limiting groove originally stuck by the conical rod is opened. At this time, the telescopic cutter can be retracted and retracted normally, and will not be restricted by being stuck by the conical rod, so as to avoid the telescopic cutter extending outward when punching downward, which will reduce the punching efficiency and cause accidents of bending and damage. When the piston plate descends, it will also drive the connecting rod to lower the piston plate. When the piston plate descends, negative pressure is generated above the piston plate, and the hydraulic oil inside the hydraulic pipe 1 is pressurized to flow back into the hydraulic box, and drive the piston rod 1 and the partition 1 to rise, so that the hole on the telescopic cutter blocked by the partition 1 is opened, so that the high-pressure gas can enter the telescopic cutter from between the drill pipe and the inner pipe through the hole at the tail end of the telescopic cutter, so that it can be fully extended outward, so that when the device rotates to spray high-pressure cement slurry and high-pressure gas, the telescopic cutter will also rotate and rise together, and cut the surrounding soil and gravel, so that the sprayed cement slurry can be sprayed to the specified distance, avoiding the deep soil being more compact than the shallow soil, and the sprayed cement slurry cannot be sprayed to the specified distance in the deep soil, so that the cement pile formed after the cement solidifies presents a shape of wide at the top and narrow at the bottom, thereby causing the cement pile to be unstable, which affects the reinforcement of the entire foundation.

[0011] Preferably, the anti-adhesion mechanism also includes a telescopic spring three fixedly connected to the top of the sliding block one, an arc-shaped protrusion is slidably connected to the inner wall of the telescopic cutter, a telescopic spring four is fixedly connected to the top of the arc-shaped protrusion, and a right-angle block is fixedly connected to the inner wall of the telescopic cutter. When the telescopic cutter is stuck by the tapered rod, the sliding block one is pressed to move upward, and the telescopic spring three contracts synchronously, and the sliding plate is also pressed to move to both sides, so that the closed state is opened, and the outer wall is tightly fitted to the tapered head part of the tapered rod. When the telescopic cutter releases the restriction of the tapered rod, the sliding block one is acted upon by the telescopic spring three to rebound downward, and the sliding plate is also acted upon by the telescopic spring two to move outward, so that the sliding plates on both sides contact each other to form a closed state.

[0012] Preferably, the anti-adhesion mechanism also includes a sliding block 2 slidably connected to the inner wall of the telescopic cutter, the outer wall of the sliding block 2 is fixedly connected with a diamond-shaped protrusion, the outer wall of the diamond-shaped protrusion is slidably connected to the inner wall of the telescopic cutter, and a sliding groove is provided on the inner wall of the telescopic cutter. By utilizing the above-mentioned characteristics that the telescopic cutter will fully extend outward after the high-pressure gas is injected, after the conical rod moves downward and leaves the limit groove, the telescopic cutter loses its restriction and can be normally extended and retracted. At this time, the sliding block 1 slides downward under the action of the telescopic spring 3, and the sliding plate will also extend outward under the action of the telescopic spring 2, so that the sliding plates at both ends contact each other and form a closed state. When the high-pressure gas is injected into the telescopic cutter and extends outward, the arc-shaped protrusion is stuck in the groove at the top of the sliding block 2 under the action of the telescopic spring 4, and the telescopic cutter moves outward. When the sliding block 2 moves outward, it is affected by the diamond-shaped protrusion and moves along the trajectory of the sliding groove. When it moves to the end of the sliding groove, the bottom of the sliding block 2 will be aligned with the telescopic The bottom of the blade in the middle of the cutter is flush, so that the limiting groove of the blade in the middle of the telescopic cutter is blocked by the second sliding block. When the telescopic cutter continues to extend outward, the arc-shaped protrusion is pressed and retracted, and the arc-shaped protrusion loses contact with the second sliding block. When the telescopic cutter retracts under the action of the telescopic spring 1, the right-angle block pushes the second sliding block to retract inward. The second sliding block slides up in the sliding groove along the diamond-shaped protrusion. After rising from the inclined plane to the horizontal position, the arc-shaped protrusion is stuck in the groove at the top of the second sliding block again and continues to return inward. Retraction is used to achieve reset. Through the operation of the above-mentioned components, the limit groove on the telescopic cutter will automatically close when the telescopic cutter moves outward, so as to prevent the cement slurry from sticking to the holes of the limit groove when the telescopic cutter is stirred and cut in the cement slurry, so that the cement slurry is brought into the inside of the telescopic cutter when the telescopic cutter retracts, causing the problem of difficulty in cleaning the equipment later, and after the conical rod rises and gets stuck in the limit groove, it contacts with the residual cement slurry. After the cement slurry solidifies, the conical rod and the limit groove are welded, so that the equipment cannot operate normally.

[0013] Preferably, the anti-blocking mechanism also includes a pressure spring 2 fixedly connected to the bottom of the pressure plate 2, a piston rod 2 fixedly connected to the bottom of the pressure plate 2, a hydraulic tube 2 fixedly connected to the inner wall of the inner tube, the outer wall of the piston rod 2 is slidably connected to the inner wall of the hydraulic tube 2, and a piston rod 3 is slidably connected to the inner wall of the hydraulic tube 2. When cement slurry is poured, the descending cement slurry will squeeze the pressure plate 2 to descend, and when the pressure plate 2 descends, the piston rod 2 will be driven to descend together. At this time, the pressure spring 2 contracts, and when the piston rod 2 descends, it will squeeze the hydraulic oil inside the hydraulic tube 2, so that the hydraulic oil inside the hydraulic tube 2 can push the piston rod 3 to extend outward, thereby driving the subsequent components to continue to operate.

[0014] Preferably, the anti-blocking mechanism also includes a pushing block fixedly connected to the outer wall of the piston rod three, a rotating shaft is fixedly connected to the inner wall of the cement slurry nozzle, an arc-shaped connecting rod is rotatably connected to the outer wall of the rotating shaft, the outer wall of the arc-shaped connecting rod is rotatably connected to the inner wall of the cement slurry nozzle, an arc spring is fixedly connected to the outer wall of the arc-shaped connecting rod, and a blocking ball is fixedly connected to the outer wall of the arc-shaped connecting rod. The characteristic that the pressure plate two will be pressed down during the injection of high-pressure cement slurry is utilized. When the high-pressure cement slurry enters the inner tube, the pressure plate two will be squeezed downward to shrink downward. When the pressure plate two moves downward, the partition plate two and the piston rod two are synchronously driven to descend. When the piston rod two descends, the hydraulic oil inside the hydraulic pipe two is squeezed, so that the hydraulic oil pushes the piston rod three to extend outward, and the piston rod three extends outward. The arc connecting rod is pushed by the pushing block to rotate the arc connecting rod around the rotating shaft, so that the hole of the cement slurry nozzle blocked by the blocking ball is opened, and the high-pressure cement slurry can be normally sprayed out from the inner tube through the cement slurry nozzle, avoiding the situation that the high-pressure cement slurry is sprayed after the drill bit drills to a specified depth, and impurities such as mud and soil blocks are easy to block the holes of the cement slurry nozzle when the drill bit drills downward, so that the cement slurry is blocked during spraying, or the pressure of the cement slurry spraying outward is reduced. At the same time, the blocking and closing of the cement slurry nozzle by the blocking ball can also prevent the mud from flowing back into the inner tube. When the mud inside the inner tube is accumulated too much, the telescopic cutter will extend outward in advance, causing the accident of the telescopic cutter bending and damage.

[0015] The present invention has the following beneficial effects:

[0016] (1) The present invention utilizes the characteristic that the pressure plate 1 will be pressed down when the high-pressure cement slurry is poured. When the high-pressure cement slurry enters the inner tube, it will squeeze the pressure plate 1 downward to make it shrink downward. When the pressure plate 1 moves downward, the sliding rod and the connecting plate drive the conical rod to move downward, so that the limit groove originally stuck by the conical rod is opened. At this time, the telescopic cutter can be normally extended and retracted without being restricted by being stuck by the conical rod. This avoids the telescopic cutter extending outward when punching downward, which will reduce the punching efficiency and cause accidents such as bending and damage. When the pressure plate 1 drops, it will also drive the connecting rod to drop the piston plate. When the piston plate drops, negative pressure is generated above the piston plate, and the hydraulic oil inside the hydraulic pipe 1 is pressurized and flows back into the hydraulic box. The telescopic cutter is rotated and raised to the specified distance, so that the deep soil is more compact than the shallow soil, and the sprayed cement slurry cannot be sprayed to the specified distance in the deep soil, so that the cement pile formed after the cement solidifies will present a shape of wide top and narrow bottom, which makes the cement pile unstable and affects the reinforcement of the entire foundation.

[0017] (2) The present invention utilizes the above-mentioned characteristic that the telescopic cutter will continuously cut the surrounding soil and gravel when it rotates and rises. When the drill pipe continuously rotates and rises, it will synchronously drive the telescopic cutter to rotate together, so that the telescopic cutter cuts the surrounding soil during continuous rotation. Due to the inclined design of the telescopic cutter, the telescopic cutter can continuously stir the ejected cement slurry while continuously rotating and cutting. When the telescopic cutter continuously stirs, the cement slurry and the surrounding soil and gravel and other impurities can be fully mixed, so that the cement pile formed after solidification has the same hardness inside and outside. Because the density of gas is much lower than that of solid and liquid, when the telescopic cutter continuously stirs and rises, the gas in the cement slurry can be discharged upward to the top of the cement slurry during stirring and rising, thereby avoiding that some gas will enter the cement slurry during high-pressure cement slurry rotary spraying and high-pressure gas injection, so that there are more holes formed by air bubbles inside the solidified cement pile, resulting in insufficient hardness and poor stability of the cement pile.

[0018] (3) The present invention utilizes the above-mentioned characteristic that the telescopic cutter will fully extend outward after the high-pressure gas is injected. After the conical rod moves downward and leaves the limiting groove, the telescopic cutter loses its restriction and can be normally extended and retracted. At this time, the sliding block 1 slides downward under the action of the telescopic spring 3, and the sliding plate also extends outward under the action of the telescopic spring 2, so that the sliding plates at both ends contact each other and form a closed state. When the telescopic cutter is extended outward by the high-pressure gas injected into the interior, the arc-shaped protrusion is stuck in the groove at the top of the sliding block 2 due to the action of the telescopic spring 4. When the telescopic cutter moves outward, the sliding block 2 is driven to move outward. When the sliding block 2 moves outward, it is affected by the diamond-shaped protrusion and moves along the trajectory of the sliding groove. When it moves to the end of the sliding groove, the bottom of the sliding block 2 will be flush with the bottom of the blade in the middle of the telescopic cutter, so that the limiting groove of the blade in the middle of the telescopic cutter is blocked by the sliding block 2. When the telescopic cutter continues to extend outward, the arc-shaped protrusion is compressed and retracted, and the arc-shaped protrusion loses contact with the sliding block 2. When the telescopic cutter retracts under the action of the telescopic spring 1, the right-angle block pushes the sliding block 2 to retract inward, and the sliding block 2 slides and rises in the sliding groove along the diamond-shaped protrusion. After rising from the inclined plane to the horizontal position, the arc-shaped protrusion is re-stuck in the groove at the top of the sliding block 2 and continues to retract inward to achieve reset. Through the operation of the above-mentioned components, the limit groove on the telescopic cutter will automatically close when the telescopic cutter moves outward, avoiding that the cement slurry will adhere to the holes in the limit groove when the telescopic cutter is stirred and cut in the cement slurry, so that the telescopic cutter will bring it into the interior of the telescopic cutter when it retracts, causing the problem of difficulty in cleaning the equipment in the later stage, and after the conical rod rises and blocks the limit groove, it contacts with the residual cement slurry. After the cement slurry solidifies, the conical rod will be welded to the limit groove, making the equipment unable to operate normally.

[0019] (4) The present invention utilizes the characteristic that the pressure plate 2 will be pressed down when the high-pressure cement slurry is poured. When the high-pressure cement slurry enters the inner tube, it will squeeze the pressure plate 2 downward to make it shrink downward. When the pressure plate 2 moves downward, it will synchronously drive the partition plate 2 and the piston rod 2 to descend. When the piston rod 2 descends, it squeezes the hydraulic oil inside the hydraulic pipe 2, so that the hydraulic oil pushes the piston rod 3 to extend outward. The piston rod 3 extends outward and pushes the arc connecting rod through the pushing block, so that the arc connecting rod rotates around the rotating shaft, so that the hole blocked by the plugging ball in the cement slurry nozzle is opened, and the high-pressure cement slurry can flow out normally. The cement slurry is sprayed outwards from the inner tube through the cement slurry nozzle, which avoids the situation that the high-pressure cement slurry is injected after the drill bit drills to the specified depth. When the drill bit is drilling downwards, impurities such as mud and soil blocks are easy to block the holes of the cement slurry nozzle, which hinders the cement slurry from spraying or reduces the pressure of the cement slurry spraying outwards. At the same time, the blocking ball closes the cement slurry nozzle, which can also prevent the mud from flowing back into the inner tube. When too much mud is accumulated in the inner tube, the telescopic cutter will extend outwards prematurely, causing the telescopic cutter to bend and be damaged accidentally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the internal components of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal components of the cutting and stirring mechanism of the present invention;

[0024] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0025] Figure 5 This is a schematic diagram of the internal components of the anti-adhesion mechanism of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified schematic diagram of B;

[0027] Figure 7 This is a schematic diagram of the internal components of the anti-blocking mechanism of the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified schematic diagram of C in the middle.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] In the figure: 1. cutting and stirring mechanism; 101. drill pipe; 102. inner pipe; 103. telescopic cutter; 104. drill bit; 105. pressure plate 1; 106. pressure spring 1; 107. connecting rod; 108. sliding rod; 109. fixed block; 110. hydraulic box; 111. piston plate; 112. hydraulic pipe 1; 113. piston rod 1; 114. partition 1; 115. telescopic spring 1; 116. connecting plate; 117. tapered rod; 118. limit groove; 119. air flow nozzle; 2. anti-adhesion mechanism; 201. sliding plate; 202. telescopic spring 2; 203. sliding block 1; 204. telescopic spring Compression spring three; 205, arc-shaped protrusion; 206, telescopic spring four; 207, right-angle block; 208, sliding block two; 209, diamond-shaped protrusion; 210, sliding groove; 3, anti-blocking mechanism; 301, cement slurry nozzle; 302, pressure plate two; 303, partition two; 304, pressure spring two; 305, piston rod two; 306, hydraulic pipe two; 307, piston rod three; 308, push block; 309, rotating shaft; 310, arc-shaped connecting rod; 311, arc-shaped spring; 312, blocking ball; 4, positioning mechanism; 401, fixing ring; 402, connecting block; 403, supporting pile; 404, pile tip. DETAILED DESCRIPTION

[0031] 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.

[0032] For example, see Figure 1-Figure 4 The present invention is a double-tube jet grouting equipment with a positioning mechanism, comprising a cutting and stirring mechanism 1, wherein the cutting and stirring mechanism 1 further comprises a drill pipe 101, an inner pipe 102 is fixedly connected to the inner wall of the drill pipe 101, a telescopic cutter 103 is fixedly connected to the inner wall of the drill pipe 101, and a drill bit 104 is fixedly connected to the bottom of the drill pipe 101;

[0033] The anti-adhesion mechanism 2 includes a sliding plate 201 slidably connected to the inner wall of the telescopic cutter 103, a telescopic spring 202 is fixedly connected to the outer wall of the sliding plate 201, and a sliding block 203 is slidably connected to the inner wall of the telescopic cutter 103;

[0034] The anti-blocking mechanism 3 includes a cement slurry nozzle 301 fixedly connected to the inner wall of the drill pipe 101, a second pressure plate 302 is slidably connected to the inner wall of the inner pipe 102, and a second partition plate 303 is fixedly connected to the bottom of the second pressure plate 302;

[0035] The positioning mechanism 4 includes a fixing ring 401 rotatably connected to the outer wall of the drill pipe 101 , a connecting block 402 is fixedly connected to the outer wall of the fixing ring 401 , a supporting pile 403 is fixedly connected to the bottom of the connecting block 402 , and a pile tip 404 is fixedly connected to the bottom of the supporting pile 403 .

[0036] The cutting and stirring mechanism 1 also includes a pressure plate 105 slidably connected to the inner wall of the inner tube 102, a pressure spring 106 is fixedly connected to the bottom of the pressure plate 105, a connecting rod 107 is fixedly connected to the bottom of the pressure plate 105, a sliding rod 108 is fixedly connected to the outer wall of the pressure plate 105, the outer wall of the sliding rod 108 is slidably connected to the inner wall of the inner tube 102, and a fixed block 109 is fixedly connected to the bottom of the inner tube 102. By utilizing the above-mentioned characteristics, the telescopic cutter 103 will continuously cut the surrounding soil and gravel when rotating and rising. When the drill pipe 101 continuously rotates and rises, it will synchronously drive the telescopic cutter 103 to rotate together, so that the telescopic cutter 103 cuts the surrounding soil during continuous rotation. The inclined design of the telescopic cutter 103 allows the telescopic cutter 103 to continuously stir the ejected cement slurry while continuously rotating and cutting. When the telescopic cutter 103 continuously stirs, the cement slurry can be fully mixed with impurities such as soil and gravel around it, so that the hardness of the cement pile formed after solidification is consistent inside and outside. Because the density of gas is much lower than that of solid and liquid, when the telescopic cutter 103 continuously stirs and rises, the gas in the cement slurry can be discharged upward to the top of the cement slurry during the stirring and rising, thereby avoiding some gas from entering the cement slurry during high-pressure cement slurry rotary jet injection and high-pressure gas injection, causing more holes formed by air bubbles inside the solidified cement pile, thereby causing the cement pile to be insufficiently hard and poorly stable.

[0037] The cutting and stirring mechanism 1 also includes a hydraulic box 110 fixedly connected to the top of the fixed block 109, the outer wall of the hydraulic box 110 is fixedly connected to the inner wall of the inner tube 102, the inner wall of the hydraulic box 110 is slidably connected with a piston plate 111, the inner wall of the piston plate 111 is fixedly connected to the outer wall of the connecting rod 107, the outer wall of the hydraulic box 110 is fixedly connected with a hydraulic pipe 112, the inner wall of the hydraulic pipe 112 is slidably connected with a piston rod 113, and the bottom of the piston rod 113 is fixedly connected with a partition 114. When the piston plate 111 descends, a negative pressure state is formed on the top of the piston plate 111. At this time, the hydraulic oil in the hydraulic pipe 112 will be affected by the negative pressure and flow back into the hydraulic box 110. While the hydraulic oil flows back, it drives the piston rod 113 to move upward. When the piston rod 113 moves upward, it drives the partition 114 to move upward together, so that the hole on the telescopic cutter 103 that was originally blocked by the partition 114 is opened, so that the high-pressure gas can enter the telescopic cutter 103 and make it fully extend outward.

[0038] The cutting and stirring mechanism 1 also includes a telescopic spring 115 fixedly connected to the inner wall of the telescopic cutter 103, the outer wall of the telescopic cutter 103 is fixedly connected to the inner wall of the fixed block 109, the bottom of the sliding rod 108 is fixedly connected to a connecting plate 116, the top of the connecting plate 116 is fixedly connected to a conical rod 117, a limiting groove 118 is provided on the inner wall of the telescopic cutter 103, and an air flow nozzle 119 is fixedly connected to the inner wall of the drill pipe 101. When the high-pressure cement slurry is poured, the pressure plate 105 will be pressed down. When the high-pressure cement slurry enters the inner tube 102, it will press the pressure plate 105 downward to shrink it downward. When the pressure plate 105 moves downward, the sliding rod 108 and the connecting plate 116 drive the tapered rod 117 to move downward, so that the limit groove 118 originally stuck by the tapered rod 117 is opened. At this time, the telescopic cutter 103 can be stretched normally and will not be restricted by being stuck by the tapered rod 117, so as to avoid the telescopic cutter 103 extending outward when punching downward, which will reduce the punching efficiency and cause bending damage. When the pressure plate 105 descends, the connecting rod 107 is also driven to make the piston plate 111 descend. When the piston plate 111 descends, negative pressure is generated above the piston plate 111, and the hydraulic oil in the hydraulic pipe 112 is pressurized and flows back into the hydraulic box 110, driving the piston rod 113 and the partition 114 to rise, so that the hole on the telescopic cutter 103 blocked by the partition 114 is opened, so that the high-pressure gas can enter the telescopic cutter 103 from between the drill pipe 101 and the inner pipe 102 through the hole at the tail end of the telescopic cutter 103. 03 is inserted into the interior of the device and fully extended outward, so that when the device rotates to spray high-pressure cement slurry and high-pressure gas, the telescopic cutter 103 will also rotate and rise together, and cut the surrounding soil and gravel, so that the sprayed cement slurry can be sprayed to a specified distance, to avoid the deep soil being more compact than the shallow soil, and the sprayed cement slurry cannot be sprayed to a specified distance in the deep soil, so that the cement pile formed after the cement solidifies will present a shape of being wide at the top and narrow at the bottom, thereby causing the cement pile to be unstable and affecting the reinforcement of the entire foundation.

[0039] For example 2, please refer to Figure 5-Figure 8The present invention is a double-tube jet grouting pile device with a positioning mechanism. On the basis of the first embodiment, the anti-adhesion mechanism 2 also includes a telescopic spring 3 204 fixedly connected to the top of the sliding block 1 203, an arc-shaped protrusion 205 is slidably connected to the inner wall of the telescopic cutter 103, and a telescopic spring 4 206 is fixedly connected to the top of the arc-shaped protrusion 205. A right-angle block 207 is fixedly connected to the inner wall of the telescopic cutter 103. When the telescopic cutter 103 is stuck by the tapered rod 117, the sliding block 204 is fixedly connected to the inner wall of the telescopic cutter 103. 03 is pressed to move upward, the telescopic spring three 204 contracts synchronously, and the sliding plate 201 is also pressed to move to both sides, so that the closed state is opened, and the outer wall is tightly fitted to the cone head part of the conical rod 117. When the telescopic cutter 103 releases the restriction of the conical rod 117, the sliding block 1 203 is acted upon by the telescopic spring three 204 to rebound downward, and the sliding plate 201 is also acted upon by the telescopic spring two 202 to move outward, so that the sliding plates 201 on both sides are in contact with each other, forming a closed state.

[0040] The anti-adhesion mechanism 2 also includes a sliding block 208 slidably connected to the inner wall of the telescopic cutter 103, and a diamond-shaped protrusion 209 is fixedly connected to the outer wall of the sliding block 208. The outer wall of the diamond-shaped protrusion 209 is slidably connected to the inner wall of the telescopic cutter 103. A sliding groove 210 is provided on the inner wall of the telescopic cutter 103. By utilizing the above-mentioned characteristics that the telescopic cutter 103 will fully extend outward after the high-pressure gas is injected, after the tapered rod 117 moves downward and leaves the limit groove 118, the telescopic cutter 103 loses its restriction and can be normally extended and retracted. At this time, the sliding block 103 slides downward under the action of the telescopic spring 3 204, and the sliding The plate 201 will also extend outwards under the action of the telescopic spring 202, so that the sliding plates 201 at both ends contact each other to form a closed state. When the high-pressure gas is injected into the telescopic cutter 103 and extends outwards, the arc-shaped protrusion 205 is stuck in the groove at the top of the sliding block 208 due to the action of the telescopic spring 206. When the telescopic cutter 103 moves outwards, the sliding block 208 is driven to move outwards. When the sliding block 208 moves outwards, it is affected by the diamond-shaped protrusion 209 and moves along the trajectory of the sliding groove 210. When it moves to the end of the sliding groove 210, the bottom of the sliding block 208 will contact the telescopic cutter 103. The bottom of the blade in the middle of the knife 103 is flush, so that the limiting groove 118 of the blade in the middle of the telescopic cutter 103 is blocked by the second sliding block 208. When the telescopic cutter 103 continues to extend outward, the arc-shaped protrusion 205 is compressed and retracted, and the arc-shaped protrusion 205 loses contact with the second sliding block 208. When the telescopic cutter 103 retracts under the action of the telescopic spring 115, the right-angle block 207 pushes the second sliding block 208 to retract inward, and the second sliding block 208 slides and rises in the sliding groove 210 along the diamond-shaped protrusion 209. After rising from the inclined surface to the horizontal position, the arc-shaped protrusion 205 is stuck in the groove at the top of the second sliding block 208 again. The telescopic cutter 103 is moved outwards and the limit groove 118 on the telescopic cutter 103 is automatically closed to prevent the cement slurry from sticking to the hole of the limit groove 118 when the telescopic cutter 103 is stirred and cut in the cement slurry, so that the telescopic cutter 103 is brought into the interior of the telescopic cutter 103 when it retracts, causing the problem of difficulty in cleaning the equipment later. After the tapered rod 117 rises and blocks the limit groove 118, it contacts with the residual cement slurry. After the cement slurry solidifies, the tapered rod 117 and the limit groove 118 are welded, so that the equipment cannot operate normally.

[0041] The anti-blocking mechanism 3 also includes a pressure spring 2 304 fixedly connected to the bottom of the pressure plate 2 302, a piston rod 2 305 fixedly connected to the bottom of the pressure plate 2 302, a hydraulic pipe 2 306 fixedly connected to the inner wall of the inner tube 102, the outer wall of the piston rod 2 305 is slidably connected to the inner wall of the hydraulic pipe 2 306, and a piston rod 3 307 is slidably connected to the inner wall of the hydraulic pipe 2 306. When cement slurry is poured, the descending cement slurry will squeeze the pressure plate 2 302 to descend. When the pressure plate 2 302 descends, the piston rod 2 305 is driven to descend together. At this time, the pressure spring 2 304 contracts, and when the piston rod 2 305 descends, it will squeeze the hydraulic oil inside the hydraulic pipe 2 306, so that the hydraulic oil inside the hydraulic pipe 2 306 can push the piston rod 3 307 to extend outward, thereby driving the continued operation of subsequent components.

[0042] The anti-clogging mechanism 3 also includes a pushing block 308 fixedly connected to the outer wall of the piston rod 307, a rotating shaft 309 fixedly connected to the inner wall of the cement slurry nozzle 301, an arc connecting rod 310 rotatably connected to the outer wall of the rotating shaft 309, the outer wall of the arc connecting rod 310 is rotatably connected to the inner wall of the cement slurry nozzle 301, an arc spring 311 is fixedly connected to the outer wall of the arc connecting rod 310, and a blocking ball 312 is fixedly connected to the outer wall of the arc connecting rod 310. The pressure plate 2 302 will be pressed down when the high-pressure cement slurry is poured. When the high-pressure cement slurry enters the inner tube 102, the pressure plate 2 302 will be squeezed downward to shrink downward. When the pressure plate 2 302 moves downward, the partition 2 303 and the piston rod 2 305 are synchronously driven to descend. When the piston rod 2 305 descends, the hydraulic oil inside the hydraulic pipe 2 306 is squeezed, so that the hydraulic oil pushes the piston rod 307 to extend outward. The push block 307 extends outward and pushes the arc connecting rod 310 through the pushing block 308, so that the arc connecting rod 310 rotates around the rotating shaft 309, so that the hole of the cement slurry nozzle 301 blocked by the blocking ball 312 is opened, and the high-pressure cement slurry can be normally sprayed outward from the inner tube 102 through the cement slurry nozzle 301, avoiding the high-pressure cement slurry being sprayed after the drill bit 104 drills to a specified depth, and when the drill bit 104 drills downward, impurities such as mud and soil blocks are easy to block the hole of the cement slurry nozzle 301, so that the cement slurry is blocked during spraying, or the pressure of the cement slurry spraying outward is reduced. At the same time, the blocking and closing of the cement slurry nozzle 301 by the blocking ball 312 can also prevent the mud from flowing back into the inner tube 102. When the mud in the inner tube 102 is accumulated too much, the telescopic cutter 103 will be extended outward in advance, causing the telescopic cutter 103 to be bent and damaged.

[0043] A specific application of this embodiment is: before using the device, first install the device at the required position, then connect the high-pressure gas pipe to the drill pipe 101, and connect the high-pressure cement slurry pipe to the inner pipe 102. When the high-pressure cement slurry enters the inner pipe 102, it will press the pressure plate 105 downward to shrink it downward. When the pressure plate 105 moves downward, the sliding rod 108 and the connecting plate 116 drive the tapered rod 117 to move downward, so that the limiting groove 118 originally stuck by the tapered rod 117 is opened. At this time, the telescopic cutter 103 can be stretched and retracted normally, and will not be restricted by being stuck by the tapered rod 117, so as to avoid the telescopic cutter 103 extending outward when drilling downward. When the pressure plate 105 descends, the connecting rod 107 is also driven to descend the piston plate 111. When the piston plate 111 descends, negative pressure is generated above the piston plate 111, and the hydraulic oil in the hydraulic pipe 112 is pressurized to flow back into the hydraulic box 110, and drives the piston rod 113 and the partition 114 to rise, so that the hole on the telescopic cutter 103 blocked by the partition 114 is opened, so that the high-pressure gas can enter the telescopic cutter 103 from between the drill pipe 101 and the inner pipe 102 through the hole at the rear end of the telescopic cutter 103, so that it is completely extended outward, so that the device can rotate and spray high-pressure cement slurry and high-pressure cement slurry. When the drill pipe 101 is rotated and raised, the telescopic cutter 103 will also rotate and rise together, and cut the surrounding soil and gravel, so that the sprayed cement slurry can be sprayed to a specified distance, to avoid the deep soil being more compact than the shallow soil, and the sprayed cement slurry cannot be sprayed to a specified distance in the deep soil, so that the cement pile formed after the cement solidifies will present a shape of wide at the top and narrow at the bottom, thereby causing the cement pile to be not stable enough, affecting the reinforcement of the entire foundation. When the drill pipe 101 continuously rotates and rises, it will synchronously drive the telescopic cutter 103 to rotate together, so that the telescopic cutter 103 cuts the surrounding soil during continuous rotation, and due to the inclined design of the telescopic cutter 103, the telescopic cutter 103 During the continuous rotation and cutting, the ejected cement slurry will also be continuously stirred. When the telescopic cutter 103 is continuously stirring, the cement slurry can be fully mixed with the surrounding soil blocks, gravel and other impurities, so that the cement pile formed after solidification has the same hardness inside and outside. Because the density of gas is much lower than that of solid and liquid, when the telescopic cutter 103 is continuously stirring and rising, the gas in the cement slurry can be discharged upward to the top of the cement slurry during the stirring and rising, avoiding some gas from entering the cement slurry during the high-pressure cement slurry rotary jet injection and high-pressure gas injection, so that there are more holes formed by air bubbles inside the solidified cement pile, which causes the cement pile to be insufficiently hard and poorly stable.

[0044] By utilizing the above-mentioned feature that the telescopic cutter 103 will be fully extended outward after the high-pressure gas is injected, after the conical rod 117 moves downward and leaves the limit groove 118, the telescopic cutter 103 loses its restriction and can be normally extended and retracted. At this time, the sliding block 1 203 slides downward under the action of the telescopic spring 3 204, and the sliding plate 201 is also extended outward under the action of the telescopic spring 202, so that the sliding plates 201 at both ends contact each other to form a closed state. When the high-pressure gas is injected into the telescopic cutter 103 and it extends outward, the arc-shaped protrusion 205 is extended by the telescopic spring 204. The compression spring 206 is stuck in the groove at the top of the sliding block 208, and when the telescopic cutter 103 moves outward, the sliding block 208 is driven to move outward. When the sliding block 208 moves outward, it is affected by the diamond-shaped protrusion 209 and moves along the trajectory of the sliding groove 210. When it moves to the end of the sliding groove 210, the bottom of the sliding block 208 will be flush with the bottom of the blade in the middle of the telescopic cutter 103, so that the limiting groove 118 of the blade in the middle of the telescopic cutter 103 is blocked by the sliding block 208, and the telescopic cutter 103 is closed. When the knife 103 continues to extend outward, the arc-shaped protrusion 205 is compressed and retracted, and the arc-shaped protrusion 205 loses contact with the second sliding block 208. When the telescopic cutter 103 is retracted by the action of the telescopic spring 115, the right-angle block 207 pushes the second sliding block 208 to retract inward, and the second sliding block 208 slides and rises in the sliding groove 210 along the diamond-shaped protrusion 209. After rising from the inclined plane to the horizontal position, the arc-shaped protrusion 205 is stuck in the groove at the top of the second sliding block 208 again and continues to retract inward to achieve reset. Through the operation of the above components, the telescopic cutter 103 is retracted. When the telescopic cutter 103 moves outward, the limit groove 118 on the telescopic cutter 103 will automatically close to prevent the cement slurry from sticking to the holes of the limit groove 118 when the telescopic cutter 103 is stirred and cut in the cement slurry, so that the telescopic cutter 103 will be brought into the interior of the telescopic cutter 103 when it retracts, causing difficulties in cleaning the equipment later. After the tapered rod 117 rises and gets stuck in the limit groove 118, it comes into contact with the residual cement slurry. After the cement slurry solidifies, the tapered rod 117 and the limit groove 118 will be welded, making the equipment unable to operate normally.

[0045] By utilizing the characteristic that the pressure plate 2 302 will be pressed down when the high-pressure cement slurry is poured, when the high-pressure cement slurry enters the inner tube 102, it will squeeze the pressure plate 2 302 downward to make it shrink downward. When the pressure plate 2 302 moves downward, it will synchronously drive the partition 2 303 and the piston rod 2 305 to descend. When the piston rod 2 305 descends, it squeezes the hydraulic oil inside the hydraulic pipe 2 306, so that the hydraulic oil pushes the piston rod 307 to extend outward. The piston rod 307 extends outward and pushes the arc connecting rod 310 through the pushing block 308, so that the arc connecting rod 310 rotates around the rotating shaft 309, so that the hole blocked by the blocking ball 312 in the cement slurry nozzle 301 is opened, and the high-pressure cement slurry can The high-pressure cement slurry is normally sprayed outward from the inner tube 102 through the cement slurry nozzle 301, avoiding the situation that the high-pressure cement slurry is sprayed out after the drill bit 104 drills to a specified depth. When the drill bit 104 drills downward, impurities such as mud and soil blocks are easy to block the holes of the cement slurry nozzle 301, so that the cement slurry is blocked during spraying, or the pressure of the cement slurry spraying outward is reduced. At the same time, the blocking ball 312 blocks and closes the cement slurry nozzle 301, which can also prevent the mud from flowing back into the inner tube 102. When the mud in the inner tube 102 is accumulated too much, the telescopic cutter 103 will be extended outward in advance, causing the telescopic cutter 103 to bend and be damaged accidentally.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-tube jet grouting pile device with a positioning mechanism, comprising a cutting and stirring mechanism (1), wherein the cutting and stirring mechanism (1) comprises a drill pipe (101), an inner pipe (102) is fixedly connected to the inner wall of the drill pipe (101), a telescopic cutter (103) is fixedly connected to the inner wall of the drill pipe (101), and a drill bit (104) is fixedly connected to the bottom of the drill pipe (101), characterized in that: The cutting and stirring mechanism (1) further comprises a pressure plate (105) slidably connected to the inner wall of the inner tube (102); a pressure spring (106) is fixedly connected to the bottom of the pressure plate (105); a connecting rod (107) is fixedly connected to the bottom of the pressure plate (105); a sliding rod (108) is fixedly connected to the outer wall of the pressure plate (105); the outer wall of the sliding rod (108) is slidably connected to the inner wall of the inner tube (102); the bottom of the inner tube (102) is fixedly connected to the connecting rod (107); The cutting and stirring mechanism (1) further comprises a telescopic spring (115) fixedly connected to the inner wall of the telescopic cutter (103); the outer wall of the telescopic cutter (103) is fixedly connected to the inner wall of the fixed block (109); the bottom of the sliding rod (108) is fixedly connected to a connecting plate (116); the top of the connecting plate (116) is fixedly connected to a conical rod (117); and a limiting groove (118) is provided on the inner wall of the telescopic cutter (103); and further comprises: An anti-adhesion mechanism (2) comprises a sliding plate (201) slidably connected to the inner wall of the telescopic cutter (103), a second telescopic spring (202) being fixedly connected to the outer wall of the sliding plate (201), and a first sliding block (203) being slidably connected to the inner wall of the telescopic cutter (103).

2. The double-tube jet grouting equipment with a positioning mechanism according to claim 1 is characterized in that: It also comprises a positioning mechanism (4), the positioning mechanism (4) comprising a fixing ring (401) rotatably connected to the outer wall of the drill pipe (101), a connecting block (402) being fixedly connected to the outer wall of the fixing ring (401), a supporting pile (403) being fixedly connected to the bottom of the connecting block (402), and a pile tip (404) being fixedly connected to the bottom of the supporting pile (403).

3. The double-tube jet grouting equipment with a positioning mechanism according to claim 1 is characterized in that: The cutting and stirring mechanism (1) further comprises a hydraulic box (110) fixedly connected to the top of the fixed block (109); the outer wall of the hydraulic box (110) is fixedly connected to the inner wall of the inner tube (102); a piston plate (111) is slidably connected to the inner wall of the hydraulic box (110); the inner wall of the piston plate (111) is fixedly connected to the outer wall of the connecting rod (107); a hydraulic pipe 1 (112) is fixedly connected to the outer wall of the hydraulic box (110); a piston rod 1 (113) is slidably connected to the inner wall of the hydraulic pipe 1 (112); and a partition plate 1 (114) is fixedly connected to the bottom of the piston rod 1 (113).

4. The double-tube jet grouting equipment with a positioning mechanism according to claim 1 is characterized in that: An air flow nozzle (119) is fixedly connected to the inner wall of the drill pipe (101).

5. The double-tube jet grouting equipment with a positioning mechanism according to claim 1, characterized in that: The anti-adhesion mechanism (2) further comprises a telescopic spring three (204) fixedly connected to the top of the sliding block one (203); an arc-shaped protrusion (205) is slidably connected to the inner wall of the telescopic cutter (103); a telescopic spring four (206) is fixedly connected to the top of the arc-shaped protrusion (205); and a right-angle block (207) is fixedly connected to the inner wall of the telescopic cutter (103).

6. The double-tube jet grouting equipment with a positioning mechanism according to claim 5, characterized in that: The anti-adhesion mechanism (2) further comprises a second sliding block (208) slidably connected to the inner wall of the telescopic cutter (103); a diamond-shaped protrusion (209) is fixedly connected to the outer wall of the second sliding block (208); the outer wall of the diamond-shaped protrusion (209) is slidably connected to the inner wall of the telescopic cutter (103); and a sliding groove (210) is provided on the inner wall of the telescopic cutter (103).

7. The double-tube jet grouting equipment with a positioning mechanism according to claim 1, characterized in that: The anti-blocking mechanism (3) further comprises a cement slurry nozzle (301) fixedly connected to the inner wall of the drill pipe (101); a second pressure plate (302) is slidably connected to the inner wall of the inner pipe (102); a second partition (303) is fixedly connected to the bottom of the second pressure plate (302); the anti-blocking mechanism (3) further comprises a second pressure spring (304) fixedly connected to the bottom of the second pressure plate (302); a second piston rod (305) is fixedly connected to the bottom of the second pressure plate (302); a second hydraulic pipe (306) is fixedly connected to the inner wall of the inner pipe (102); the outer wall of the second piston rod (305) is connected to the second hydraulic pipe (306); The inner wall of the hydraulic pipe (306) is slidably connected to the piston rod (307); the anti-blocking mechanism (3) further comprises a pushing block (308) fixedly connected to the outer wall of the piston rod (307); the inner wall of the cement slurry nozzle (301) is fixedly connected to a rotating shaft (309); the outer wall of the rotating shaft (309) is rotatably connected to an arc-shaped connecting rod (310); the outer wall of the arc-shaped connecting rod (310) is rotatably connected to the inner wall of the cement slurry nozzle (301); the outer wall of the arc-shaped connecting rod (310) is fixedly connected to an arc spring (311); and the outer wall of the arc-shaped connecting rod (310) is fixedly connected to a blocking ball (312).

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