A noise reduction structure for a rotary drilling rig used in construction

Abstract

The present invention provides a noise reduction structure for a rotary drilling machine used in construction. The noise reduction structure includes a vertically arranged slide rail, a support base slidably connected to the slide rail, a rotary drilling device mounted on the support base, a sound insulation device arranged outside the rotary drilling device, and a bulldozer arranged inside the rotary drilling device. The support base includes a vertical plate slidably connected to the slide rail and a horizontal support plate perpendicular to the vertical plate. The rotary drilling device includes a drive shaft, a soil storage barrel rotatably mounted at the bottom of the drive shaft, a rotary drilling head mounted at the lower end of the soil storage barrel, and a rotary drilling casing sleeved outside the soil storage barrel. The sound insulation device includes a fixed sound insulation sleeve sleeved outside the rotary drilling casing, a movable sound insulation sleeve slidably mounted outside the fixed sound insulation sleeve, and a telescopic sound insulation sleeve arranged outside the movable sound insulation sleeve. The present invention activates the sound insulation device during the rotary drilling process to protect against rotary drilling noise, and uses the bulldozer to push soil out during the soil dumping process, thereby further reducing noise pollution and protecting people on site.

Description

Technical Field

[0001] The invention relates to the technical field of rotary drilling construction, and in particular to a noise reduction structure of a rotary drilling machine used for construction. Background Art

[0002] A rotary drilling rig, also known as a rotary drilling rig or pile driver, is a comprehensive drilling rig characterized by rapid drilling speed, minimal pollution, and high maneuverability. A short spiral drill bit is used for dry excavation, while a rotary drill bit can also be used for wet excavation with a mud wall. A rotary drilling rig can be used with a hammer to break up hard strata before drilling; if used with an enlarged drill bit, the hole can be enlarged at the bottom. A rotary drilling rig utilizes multi-layer telescopic drill pipes, which minimizes drilling assistance time, reduces labor intensity, and eliminates the need for mud circulation and deslagging, resulting in cost savings. This makes it particularly suitable for foundation construction in urban areas. However, the driving of the power head, especially when driving the drill bit to slough soil, generates considerable noise, particularly mechanical impact noise. This not only pollutes the surrounding environment but can also cause significant damage to the operator's eardrums. Further improvements are needed.

[0003] Chinese patent publication number CN213063458U discloses a noise reduction device for a rotary drilling machine. The device comprises mounting assemblies fixedly mounted on either side of the rotary drilling machine's power head; a circular cylinder removably mounted on either side of the power head and surrounding the power head via the mounting assemblies; a fixing assembly mounted on the inner wall of the circular cylinder at either end near the mounting assembly; a sound-absorbing sponge mounted on the inner wall of the circular cylinder via the fixing assembly; and an upper cover mounted on the top of the circular cylinder and a lower cover mounted on the bottom of the circular cylinder. This prior art effectively reduces the noise generated by the power head during drilling operations, achieving the desired effect of reducing construction noise. However, the device cannot fundamentally eliminate this noise and cannot provide noise reduction during drilling. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention discloses a noise reduction structure for a rotary drilling rig used in construction. The noise reduction structure can perform noise reduction during rotary drilling and bulldozing processes, thereby reducing noise pollution and protecting people on site.

[0005] In order to achieve the above technical objectives, the present invention provides a noise reduction structure for a construction rotary drilling machine, the noise reduction structure comprising a vertically arranged slide rail, a support base slidably connected to the slide rail, a rotary drilling device mounted on the support base, a sound insulation device disposed outside the rotary drilling device, and a bulldozer disposed inside the rotary drilling device, the support base comprising a vertical plate slidably connected to the slide rail and a horizontal support plate perpendicular to the vertical plate;

[0006] The rotary drilling device includes a drive shaft, a soil storage cylinder rotatably mounted at the bottom of the drive shaft, a rotary drilling head mounted at the lower end of the soil storage cylinder, and a rotary drilling casing sleeved outside the soil storage cylinder. The rotary drilling casing is fixed below the horizontal support plate. The drive shaft vertically passes through the horizontal support plate and extends into the rotary drilling casing, and is slidably and rotatably connected to the horizontal support plate.

[0007] The sound insulation device includes a fixed sound insulation sleeve sleeved outside the rotary drilling casing, a movable sound insulation sleeve slidably sleeved outside the fixed sound insulation sleeve, and a telescopic sound insulation sleeve provided outside the movable sound insulation sleeve. The fixed sound insulation sleeve is fixedly mounted on the lower side of the horizontal support plate and is coaxial with the rotary drilling casing and the soil storage cylinder. The movable sound insulation sleeve is connected to the horizontal support plate through an adjustment mechanism and moves up and down along the fixed sound insulation sleeve under the action of the adjustment mechanism. The telescopic sound insulation sleeve includes a telescopic mechanism and a sound insulation cloth mounted on the telescopic mechanism. Under the control of the telescopic mechanism, the sound insulation cloth is contracted, folded, or stretched outside the movable sound insulation sleeve to form a sound insulation sleeve.

[0008] The bulldozer device comprises a bulldozer slidably arranged in the soil storage barrel and a bulldozer mechanism arranged between the soil storage barrel and the rotary drilling casing. The bulldozer mechanism drives the bulldozer to move along the soil storage barrel and push soil.

[0009] A further technical solution of the present invention is that the bulldozer is connected to the drive shaft through a threaded rod, a threaded hole is provided in the drive shaft, and the threaded rod is threadedly installed in the threaded hole; the bulldozer mechanism includes a cylinder fixedly installed on the top surface of the soil storage barrel through a cylinder seat, a grooved rod rotatably installed on the cylinder arm, a gear installed on the grooved rod and a gear ring arranged on the inner arm of the rotary drilling casing, the grooved rod extends into the soil storage barrel and extends vertically along the barrel wall of the soil storage barrel to the barrel bottom of the soil storage barrel, the gear is located on the top surface of the soil storage barrel, and a first grooved rod and the gear are installed between the grooved rod and the gear. The spring pushes the gear against the soil storage barrel through the first spring to prevent it from moving up and down, the gear ring is engaged with the gear, and a key is also provided on the grooved rod. When the cylinder drives the grooved rod to move upward, the key enters the grooved rod and rotates synchronously with the gear; a first pulley is connected to the grooved rod through a spline, and the first pulley is rotatably installed in the soil storage barrel, the threaded rod and the first pulley are connected through a transmission belt, and when the driving shaft drives the grooved rod to rotate, the grooved rod drives the threaded rod to rotate, and moves downward along the threaded hole in the driving shaft to make the bulldozer push soil downward along the soil storage barrel.

[0010] A preferred technical solution of the present invention: the adjustment mechanism of the movable sound insulation sleeve includes a first screw rod and a first support rod symmetrically arranged on the movable sound insulation sleeve, the lower end of the first screw rod is rotatably connected to the movable sound insulation sleeve, the upper end extends out of the horizontal support plate, and is connected to the drive shaft through a second transmission mechanism installed on the horizontal support rod, the drive shaft controls the first screw rod through the transmission mechanism to drive the movable sound insulation sleeve to rise and fall, and the upper end of the first support rod movably extends out of the horizontal support rod; the telescopic mechanism of the telescopic sound insulation sleeve includes a second screw rod, at least two second support rods and a plurality of sliding groups evenly distributed around the sound insulation cloth. Block assembly, multiple groups of slider assemblies are respectively slidably sleeved on the lower part of the second screw rod and the second support rod, each group of slider assemblies includes multiple overlapping sliders, the uppermost slider is fixedly connected to the horizontal support plate, the lowermost slider in the slider assembly sleeved on the second screw rod is rotatably connected to the bottom end of the second screw rod, and the lowermost slider in the slider assembly sleeved on the second support rod is fixedly connected to the bottom end of the second support rod; the upper ends of the second screw rod and the second support rod extend out of the horizontal support plate, and the second screw rod is also connected to the drive shaft through the second transmission mechanism, and the drive shaft controls the second screw rod through the transmission mechanism to drive the sound insulation cloth to extend or retract.

[0011] A preferred technical solution of the present invention is as follows: two slots are provided on the rotary drilling head, and a first digging shovel and a second digging shovel are fixedly installed at the two slots.

[0012] A more preferred technical solution of the present invention is that the rotary drilling casing is made of a steel plate with a thickness of 4 to 8 mm, and 1 to 2 overflow holes are opened on the upper part of the rotary drilling casing.

[0013] The preferred technical solution of the present invention is as follows: the rotary drilling head is disc-shaped and is rotatably connected to the lower barrel mouth of the soil storage barrel; a movable plate is slidingly installed in the soil storage barrel, and a fixed block is installed on one side of the rotary drilling head, and an arc-shaped slider is provided on the side of the fixed block adjacent to the barrel wall of the soil storage barrel, the arc-shaped slider is connected to the fixed block by a second spring, and the fixed block contacts the barrel wall of the soil storage barrel through the arc surface of the arc-shaped slider; the connecting shaft of the rotary drilling head and the soil storage barrel is located between the fixed block and the rotary drilling head, and the movable plate is located above the fixed block, and the lower end of the grooved rod contacts the movable plate, and under the action of the grooved rod, the movable plate supports the arc-shaped slider and the fixed block, and the rotary drilling head is used to completely cover the soil storage barrel; and when the grooved rod moves upward, the movable plate is no longer limited, and the rotary drilling head can be rotated to open the lower barrel mouth of the soil storage barrel for excavation.

[0014] The preferred technical solution of the present invention is that the second transmission mechanism includes a second pulley connected to the driving shaft through a spline, a third pulley threadedly sleeved on the first screw rod, a fourth pulley threadedly sleeved on the second screw rod, an electric push rod fixedly mounted on the horizontal support plate and a moving rod mounted on the electric push rod cylinder arm, the second pulley, the third pulley and the fourth pulley are all rotatably mounted on the horizontal support plate, the driving shaft drives the second pulley to rotate and slide in the second pulley, a slideway is provided between the third pulley and the fourth pulley, the moving rod is H-shaped, one free end of which is connected to the electric push rod, the middle cross bar is slidably connected to the slideway, and the fifth pulley is rotatably installed at the other three free ends of the H-shaped moving rod, The sixth pulley and the seventh pulley; a movable belt in a loose state is sleeved on the periphery of the second pulley, the third pulley and the fourth pulley, and the electric push rod, the movable rod and the pulleys at each end of the movable rod are all placed in the movable belt. After the movable rod moves along the slideway toward the fourth pulley, the third pulley, the fifth pulley, the sixth pulley, the seventh pulley and the second pulley tighten the movable belt to transmit the first screw rod. At this time, the fourth pulley disengages from the movable belt; when the movable rod moves along the slideway toward the third pulley until the third pulley disengages from the movable belt, the fourth pulley contacts and transmits the transmission, and the fourth pulley, the fifth pulley, the sixth pulley and the second pulley tighten the movable belt to transmit the second screw rod.

[0015] A better technical solution of the present invention: a steel ring is fixedly installed on the sliders on the same layer in multiple groups of slider assemblies, an arc tube is fixedly installed on the outside of each slider, each layer of steel ring passes through the arc tube of the slider on the same layer and is fixed by the arc tube, the sound insulation cloth is fixedly connected to each layer of steel ring to form a multi-layer sound insulation cloth tube, and the multi-layer sound insulation cloth tube is connected as a whole to form a telescopic sound insulation cloth sleeve.

[0016] The better technical solution of the present invention is as follows: the multiple sliders of each group of slider assemblies are clamped with each other, a slot is provided on the lower half of each slider, and an elastic sheet is fixed on the upper half of the slider. The elastic sheet cooperates with the slot of the upper slider to clamp each other, and the elasticity of the elastic sheet weakens from top to bottom. When the second screw rotates, it drives the slider at the lower end to descend. At this time, the elastic sheet of the lowermost slider leaves the slot of the upper slider, and the sound insulation cloth is unfolded layer by layer from bottom to top during the descent process.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The construction method of the present invention uses a sound insulation device to reduce noise during rotary drilling, which can reduce noise pollution and protect people on site; (2) The sound insulation device of the present invention is provided with two layers, which are designed for the embedded pipe and rotary drilling respectively, and are suitable for sound insulation at different heights; (3) A bulldozer is provided in the rotary drilling device of the present invention. Traditional vibration unloading will generate a lot of noise. The use of a bulldozer can avoid noise from the source; (4) The sound insulation device and the bulldozer in the present invention are both powered by the driving shaft of the rotary drilling device. By setting a special transmission mechanism, the extension and retraction of the sound insulation cloth, the lifting and lowering of the movable sound insulation tube and the working process of the bulldozer can be controlled respectively without any influence on each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation of the soil storage cylinder and the drive shaft of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 A longitudinal cross-sectional view of

[0022] Figure 5 Schematic diagram of the structure of the slotted rod in the present invention;

[0023] Figure 6 This is an installation diagram of the rotating drum and the drive shaft of the present invention;

[0024] Figure 7 for Figure 6 A longitudinal cross-sectional view of

[0025] Figure 8 is an overall schematic diagram of the sound insulation device of the present invention;

[0026] Figure 9 Another angle view of the sound insulation device of the present invention;

[0027] Figure 10 It is a schematic diagram of the slider structure of the present invention;

[0028] Figure 11 It is a structural schematic diagram of the rotary drilling head of the present invention;

[0029] Figure 12 for Figure 11 Enlarged view of point B in the middle;

[0030] Figure 13 Schematic diagram of the installation of the second transmission mechanism of the present invention;

[0031] Figure 14 for Figure 13 Enlarged view of point C in the middle;

[0032] Figure 15 Schematic diagram of the working state of the first screw rod in the present invention;

[0033] Figure 16 Schematic diagram of the working state of the second screw rod in the present invention;

[0034] Figure 17 This is a schematic diagram of the sound insulation cloth in the present invention in the unfolded state;

[0035] Figure 18 for Figure 17 Enlarged view of point D in the middle;

[0036] Figure 19 This is a schematic diagram of the connection between the second screw rod and the slider of the present invention;

[0037] Figure 20 for Figure 19 Longitudinal cross-section of .

[0038] Reference numerals in the accompanying drawings: 101 - cylinder seat; 102 - cylinder; 103 - grooved rod; 104 - first spring; 105 - gear; 106 - first pulley; 107 - bulldozer; 108 - threaded rod; 109 - movable plate; 110 - fixed block; 111 - push block; 112 - second spring; 113 - transmission belt; 2 - sound insulation device; 201 - fixed sound insulation sleeve; 202 - movable sound insulation sleeve; 203 - first screw rod; 204 - second screw rod; 205 - slider; 206 - slot; 207 - elastic sheet; 208 - arc tube; 209 - second pulley; 210 - movable belt; 211- electric push rod; 212- third pulley; 213- fifth pulley; 214- moving rod; 215- fourth pulley; 216- sixth pulley; 217- seventh pulley; 218- sound insulation cloth; 219- first support rod; 220- second support rod, 221- slideway; 3- rotary drilling device; 301- driving shaft; 302- soil storage barrel; 303- rotary drilling head; 304- first digging shovel; 305- second digging shovel; 306- rotary drilling casing; 307- gear ring; 4- support seat; 401- vertical plate; 402- horizontal support plate; 5- slide rail; 6- cover plate. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 5The accompanying drawings are simplified versions of the embodiments and are only used to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the accompanying drawings are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the invention claimed for protection. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] The embodiment provides a noise reduction structure for a rotary drilling machine for construction, such as Figure 1 As shown, it includes a vertically arranged slide rail 5, a support base 4 slidably connected to the slide rail 5, a rotary drilling device 3 installed on the support base 4, a sound insulation device 2 arranged outside the rotary drilling device 3 and a bulldozer arranged inside the rotary drilling device 3. The support base 4 includes a vertical plate 401 slidably connected to the slide rail 5 and a horizontal support plate 402 perpendicular to the vertical plate. The support base 4 is the entire support device, which is slidably connected to the slide rail 5 through its vertical plate 401 to perform rotary drilling work. The horizontal support plate 402 serves as a support device for the rotating device and the sound insulation device. Figure 2 and Figure 6As shown, the rotary drilling device 3 includes a drive shaft 301, a soil storage barrel 302 rotatably mounted at the bottom of the drive shaft 301, a rotary drilling head 303 mounted at the lower end of the soil storage barrel 302, and a rotary drilling casing 306 sleeved outside the soil storage barrel 302. The rotary drilling casing 306 is fixed below the horizontal support plate 402. The drive shaft 301 vertically passes through the horizontal support plate 402 and extends into the rotary drilling casing 306, and is connected to the horizontal support plate 402 by sliding and rotation. The rotary drilling casing 306 is made of a steel plate with a thickness of 4 to 8 mm, and 1-2 overflow holes are opened on the upper part of the rotary drilling casing 306. Figure 11 As shown, the rotary drilling head 303 is provided with two slots, and the first digging shovel 304 and the second digging shovel 305 are fixedly mounted in the two slots. The rotary drilling device 3 performs conventional rotary drilling, and the excavated soil is placed in the soil storage barrel 302. The rotary drilling casing 306 is raised and lowered by the lifting and lowering of the vertical plate 401, and then the rotary drilling device 3 performs rotary drilling in the casing.

[0043] The embodiment provides a noise reduction structure for a rotary drilling machine for construction, such as Figure 8 and Figure 9 As shown, the sound insulation device 2 includes a fixed sound insulation sleeve 201 sleeved outside the rotary drilling casing 306, a movable sound insulation sleeve 202 slidably sleeved outside the fixed sound insulation sleeve 201, and a telescopic sound insulation sleeve provided outside the movable sound insulation sleeve 202. The fixed sound insulation sleeve 201 is fixedly installed on the lower side of the horizontal support plate 402 and is coaxial with the rotary drilling casing 306 and the soil storage cylinder 302; the movable sound insulation sleeve 202 is connected to the horizontal support plate 402 through an adjusting mechanism and moves up and down along the fixed sound insulation sleeve 201 under the action of the adjusting mechanism; the telescopic sound insulation sleeve includes a telescopic mechanism and a sound insulation cloth 218 installed on the telescopic mechanism, and under the control of the telescopic mechanism, the sound insulation cloth 218 shrinks, folds or stretches outside the movable sound insulation sleeve 202 to form a sound insulation sleeve.

[0044] The embodiment provides a noise reduction structure for a rotary drilling machine for construction, such as Figures 13 to 20As shown, the adjustment mechanism of the movable sound insulation sleeve 202 includes a first screw rod 203 and a first support rod 219 symmetrically arranged on the movable sound insulation sleeve 202, the lower end of the first screw rod 203 is rotatably connected to the movable sound insulation sleeve 202, and the upper end extends out of the horizontal support plate 402, and the upper end of the first support rod 219 movably extends out of the horizontal support rod 402; the telescopic mechanism of the telescopic sound insulation sleeve includes a second screw rod 204, three second support rods 220 and a plurality of groups of slider assemblies evenly distributed around the sound insulation cloth 218, the upper ends of the second screw rod 204 and the second support rod 220 extend out of the horizontal support plate 402, and a limit block can be provided at the top of the first screw rod 203, the first support rod 219, the second screw rod 204 and the second support rod 220 respectively to prevent the entirety from falling to the lower part of the horizontal support plate 402 during the descending process. Multiple groups of slider assemblies are respectively slidably sleeved on the lower part of the second screw rod 204 and the second support rod 220, each group of slider assemblies includes multiple overlapping sliders 205, the uppermost slider is fixedly connected to the horizontal support plate 402, the lowermost slider in the slider assembly sleeved on the second screw rod 204 is rotatably connected to the bottom end of the second screw rod 204, and the lowermost slider in the slider assembly sleeved on the second support rod 220 is fixedly connected to the bottom end of the second support rod 220; a steel ring is fixedly installed on the sliders 205 on the same layer in the multiple groups of slider assemblies, such as Figure 10 As shown, an arc tube 208 is fixedly mounted on the outside of each slider 205. The multiple sliders 205 of each slider assembly are mutually engaged. A slot 206 is provided on the lower half of each slider 205. An elastic sheet 207 is fixedly mounted on the upper half of the slider 205. The elastic sheet 207 cooperates with the slot 206 of the slider on the previous layer to lock each other. The elasticity of the elastic sheet 207 decreases from top to bottom. Each layer of steel ring passes through the arc tube 208 of the slider 205 on the same layer and is fixed by the arc tube 208. Figure 17 and Figure 18 As shown, the sound insulation cloth 218 is fixedly connected to each layer of steel ring to form a multi-layer sound insulation cloth tube. The multi-layer sound insulation cloth tube is connected as a whole to form a telescopic sound insulation cloth sleeve. The first screw rod 203 and the second screw rod 204 are both connected to the drive shaft 301 through a second transmission mechanism. The drive shaft 301 controls the rotation of the first screw rod 203 and the second screw rod 204 through the second transmission mechanism. When the first screw rod 203 rotates, it can drive the movable sound insulation sleeve 202 to rise and fall. When the second screw rod 204 rotates, it drives the lowermost slider 205 to descend. At this time, the elastic piece of the lowermost slider 205 leaves the slot 206 of the upper slider. The other layers are more elastic and therefore clamped more tightly. This can ensure that the sound insulation cloth 218 is unfolded layer by layer from bottom to top. Rotating in the right and left direction can retract the sound insulation cloth, thereby achieving the extension or contraction of the sound insulation cloth 218.

[0045] The second transmission mechanism in the embodiment is as follows Figure 15 and Figure 16 As shown, it includes a second pulley 209 connected to the drive shaft 301 through a spline, a third pulley 212 threadedly sleeved on the first screw rod 203, a fourth pulley 215 threadedly sleeved on the second screw rod 204, an electric push rod 211 fixedly mounted on the horizontal support plate 402, and a moving rod 214 mounted on the cylinder arm of the electric push rod 211. The second pulley 209, the third pulley 212 and the fourth pulley 215 are all rotatably mounted on the horizontal support plate 402, and the drive shaft 301 drives the second pulley 209 to rotate and slide in the second pulley 209. A slideway 221 is provided between the third pulley 212 and the fourth pulley 215. The moving rod 214 is H-shaped, one free end of which is connected to the electric push rod 211, and the middle cross bar is slidably connected to the slideway 221. The other three free ends of the H-shaped moving rod 214 are rotatably mounted with a fifth pulley 213, a sixth pulley 216 and a seventh pulley 217; 209, the third pulley 212 and the fourth pulley 215 are peripherally sleeved with a movable belt 210 in a relaxed state, and the electric push rod 211, the movable rod 214 and the pulleys at each end of the movable rod are all placed in the movable belt 210. After the movable rod 214 moves along the slideway 221 toward the fourth pulley 215, the third pulley 212, the fifth pulley 213, the sixth pulley 216, the seventh pulley 217 and the second pulley 209 tighten the movable belt 210 to transmit the first screw rod 203. At this time, the fourth pulley 215 disengages from the movable belt 210; when the movable rod 214 moves along the slideway 221 toward the third pulley 212 until the third pulley 212 disengages from the movable belt 210, the fourth pulley 215 contacts and transmits with the movable belt 210, and the fourth pulley 215, the fifth pulley 213, the sixth pulley 216 and the second pulley 209 tighten the movable belt 210 to transmit the second screw rod 204. The second transmission mechanism of the present invention is provided with a seventh pulley 217 and a sixth pulley 216 at one end close to the second screw rod 204. Compared with providing a single pulley, the double pulley can reduce the stroke of the movable rod 214. In other embodiments, the movable belt 210 can also be directly mounted on the second pulley 209, the third pulley 212 and the fourth pulley 215. During use, if the movement reaches its limit, the second pulley 209 will rotate and rub the movable belt 210.

[0046] The embodiment provides a noise reduction structure for a rotary drilling machine for construction, such as Figures 2 to 7 As shown, the bulldozer device includes a bulldozer blade 107 slidably placed in the soil storage barrel 302 and a bulldozer mechanism placed between the soil storage barrel 302 and the rotary drilling casing 306. The bulldozer blade 107 is driven by the bulldozer mechanism to move along the soil storage barrel 302 to push soil.

[0047] The bulldozer 107 is connected to the drive shaft 301 through a threaded rod 108, a threaded hole is provided in the drive shaft 301, and the threaded rod 108 is threadedly installed in the threaded hole; the bulldozer mechanism includes a cylinder 102 fixedly mounted on the top surface of the soil storage barrel 302 through a cylinder seat 101, a grooved rod 103 rotatably mounted on the cylinder arm of the cylinder 102, a gear 105 mounted on the grooved rod 103 and a gear ring 307 arranged on the inner arm of the rotary drilling casing 306, the grooved rod 103 extends into the soil storage barrel 302, and extends vertically along the wall of the soil storage barrel 302 to the bottom of the soil storage barrel 302, the gear 105 is located on the top surface of the soil storage barrel 302, and a first spring 104 is installed between the grooved rod 103 and the gear 105. The spring 104 pushes the gear 105 against the soil storage barrel 302 to prevent it from moving up and down. The gear ring 307 is engaged with the gear 105. A key is also provided on the grooved rod 103. When the cylinder 102 drives the grooved rod 103 to move upward, the key enters the grooved rod 103 and rotates synchronously with the gear 105; a first pulley 106 is connected to the grooved rod 103 through a spline, and the first pulley 106 is rotatably installed in the soil storage barrel 302. The threaded rod 108 is connected to the first pulley 106 through a transmission belt 113, and when the driving shaft 301 drives the grooved rod 103 to rotate, the grooved rod 103 drives the threaded rod 108 to rotate, and moves downward along the threaded hole in the driving shaft 301 to cause the bulldozer 107 to push soil downward along the soil storage barrel 302.

[0048] The embodiment provides a noise reduction structure for a rotary drilling machine for construction, such as Figure 7 、 Figure 11 and Figure 11 As shown, the rotary drilling head 303 is disc-shaped and is rotatably connected to the lower barrel mouth of the soil storage barrel 302; a movable plate 109 is slidably installed in the soil storage barrel 302, and a fixed block 110 is installed on one side of the rotary drilling head 303. The fixed block 110 is provided with an arc-shaped slider 111 on one side of the barrel wall of the soil storage barrel 302. The arc-shaped slider 111 is connected to the fixed block 111 by a second spring 112, and the fixed block 110 contacts the barrel wall of the soil storage barrel 302 through the arc surface of the arc-shaped slider 111; the rotary drilling head 303 and the soil storage barrel 30 2 is located between the fixed block 110 and the rotary digging head 303, the movable plate 109 is located above the fixed block 110, and the lower end of the grooved rod 103 is in contact with the movable plate 109, and under the action of the grooved rod 103, the movable plate 109 presses against the arc-shaped slider 111 and the fixed block 110, and the rotary digging head 303 is used to completely cover the soil storage barrel 302; and when the grooved rod 103 moves upward, the movable plate 109 is no longer limited, and the rotary digging head 303 can rotate to open the lower barrel opening of the soil storage barrel 302 for excavation.

[0049] The working process of the present invention is as follows: before the rotary drilling device 3 is used for rotary drilling, the electric push rod 211 is first started, and the electric push rod 211 drives the moving rod 214 to move toward the third pulley 212. Figure 16 As shown, at this time, the third pulley 212 is disengaged from the movable belt 210, and the fourth pulley 215 is connected to the movable belt 210. The drive shaft 301 rotates during operation, and the drive shaft 301 drives the second pulley 209, and the second pulley 209 drives the movable belt 210. The movable belt 210 drives the fourth pulley 215 to rotate. The rotation of the fourth pulley 215 drives the second screw rod 204 to move up and down, and the second screw rod 204 moves downward to drive the bottom slider 205 to move downward. The elastic sheet 207 of the bottom layer is disengaged from the slot 206 of the upper layer to unfold the sound insulation cloth 218. When the sound insulation cloth 218 is fully unfolded, continue to pull down the slider 205 of the upper layer and unfold another sound insulation cloth 218, and so on until the gear 105 of the bottom layer contacts the bottom surface, as shown in FIG. Figure 17 As shown, the position of the rotary drilling is completely closed. Then the moving rod 214 is moved in the opposite direction to connect the third pulley 212 to the active belt 210. Figure 15 As shown, the third pulley 212 rotates to drive the first screw rod 203 to move downward, and the first screw rod 203 drives the movable sound insulation sleeve 202 to move downward until the movable sound insulation sleeve 202 contacts the ground, completely closing the rotary drilling device 3. At this time, there are two layers of protective sound insulation. Before rotary drilling, it is necessary to use the rotary drilling casing 306 to lower the casing. When lowering the casing, use sound insulation cloth 218 for sound insulation protection, because the sound insulation cloth 218 can be set in multiple layers and can be stretched to a longer length.

[0050] When the soil excavated by rotary drilling fills up the soil storage cylinder 302, the driving shaft 301 retracts upward, and the device is moved to the position for discharging soil debris, and the soil is discharged by the bulldozer. During the soil discharge process, the cylinder 102 drives the grooved rod 103 upward, and the key of the grooved rod 103 cooperates with the gear 105, and the drive shaft 301 drives the soil storage barrel 302 to continue to rotate, and the gear 105 is driven to rotate by the gear ring 307. The gear 105 drives the grooved rod 103, and the grooved rod 103 drives the first pulley 106 to rotate. The first pulley 106 drives the threaded rod 108 through the belt, and the threaded rod 108 rotates and descends in the threaded hole, and the bulldozer 107 follows and descends. After the grooved rod 103 rises, the movable plate 109 is no longer restricted, and the rotary excavator head 303 and the fixed block 110 rotate. The rotary excavator head 303 no longer closes the soil storage barrel 302, and the bulldozer 107 pushes the soil in the soil storage barrel 302 out, and the soil is excavated repeatedly. In traditional rotary excavators, the soil is unloaded by the forward and reverse rotation of the rotary excavator head when unloading, which generates a lot of noise at the same time. In this embodiment, there is no noise when bulldozing.

[0051] The construction of the present invention is further described below with reference to the embodiments, and the construction steps in the embodiments are as follows:

[0052] Step 1: Pile position measurement: On the basis of the three connections and one leveling of the site, according to the data of the building measurement control network and the foundation plan layout, the pile axis grid control network and the elevation reference point are measured to determine the pile center;

[0053] Step 2: Bury the rotary drilling casing. When burying the rotary drilling casing, noise protection is performed through the sound insulation device 2. The rotary drilling casing is generally made of steel plate, and the thickness is 4-8mm depending on the hole diameter. The inner diameter of the casing should be larger than the diameter of the drill bit. Two overflow holes are opened on the upper part. The burial depth of the rotary drilling casing: should not be less than 1m in clay soil, and should not be less than 1.5m of the bulldozer device in sandy soil; the top height of the rotary drilling casing: when reverse circulation drilling is adopted, the top height of the rotary drilling casing should ensure that the mud surface in the hole is more than 2m higher than the groundwater level sound insulation device. When positive circulation drilling is adopted, the bottom edge of the overflow port at the top of the rotary drilling casing should be higher than the mud pool surface. Burial of rotary drilling casing: when the groundwater level is more than 1m below the ground, the excavation method can be used. When the groundwater level is high and it is difficult to set up, the filling method can be used. The position of the rotary drilling casing should be buried correctly and stably, and clay should be used to fill the space between the rotary drilling casing and the hole wall. The deviation between the center of the casing and the center line of the pile hole should not exceed 50mm.

[0054] Step 3: Use a rotary drilling machine to drill holes. Use a rotary drilling device 3 to perform rotary drilling. During the process, the sound insulation device 2 is used to continue protection and isolate noise. When unloading the soil, the bulldozer device is used to push the soil out of the rotary drilling device 3 to cut off the noise from the source. The holes formed by rotary drilling should be based on different stratum conditions and the depth of groundwater level. Dry drilling and mud wall drilling processes should be used. Dry drilling should not be used in silt, silty soil, sandy soil, gravel soil, soil with hard interlayers in the middle and soil layers below groundwater. When drilling holes with mud wall protection, rotary drilling rigs should be equipped with mud for drilling and cleaning holes and mud pools (boxes). In soil layers prone to mud leakage, measures such as increasing the mud density, adding sawdust, and increasing the mud viscosity with thickeners can be taken to maintain the stability of the hole wall; the mud preparation capacity should be greater than the mud demand during drilling, and the mud reserve of each drilling rig should not be less than the volume of a single pile; during the construction of the rotary drilling rig, the mechanical stability and safe operation should be ensured. If necessary, steel plates or cushion layers (roadbed plates) that can ensure its safe walking and operation can be installed on the site; before drilling holes and each time the drill bucket is raised, the condition of the drill bucket and drill rod connecting pins, drill bucket door connecting pins and wire rope should be checked, and the debris on the drill bucket should be cleared; the rotary drilling rig should adopt the skip digging method for drilling holes, and the minimum distance of the soil poured out by the drill bucket from the pile hole mouth should be greater than 6m, and should be cleared in time. Mud should be replenished synchronously according to the drilling speed to keep the required mud surface height unchanged; when the borehole reaches the designed depth, a cleaning drill bit should be used to clean the hole.

[0055] The above is merely one embodiment of the present invention, and its description is relatively specific and detailed. However, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A noise reduction structure for a construction rotary drilling machine, characterized by: The noise reduction structure comprises a vertically arranged slide rail (5), a support base (4) slidably connected to the slide rail (5), a rotary drilling device (3) mounted on the support base (4), a sound insulation device (2) arranged outside the rotary drilling device (3), and a bulldozer device arranged inside the rotary drilling device (3); the support base (4) comprises a vertical plate (401) slidably connected to the slide rail (5) and a horizontal support plate (402) perpendicular to the vertical plate; The rotary drilling device (3) comprises a driving shaft (301), a soil storage barrel (302) rotatably mounted on the bottom of the driving shaft (301), a rotary drilling head (303) mounted on the lower end of the soil storage barrel (302), and a rotary drilling casing (306) sleeved outside the soil storage barrel (302); the rotary drilling casing (306) is fixed below the horizontal support plate (402); the driving shaft (301) vertically passes through the horizontal support plate (402) and extends into the rotary drilling casing (306), and is slidably and rotatably connected to the horizontal support plate (402); The sound insulation device (2) comprises a fixed sound insulation sleeve (201) sleeved outside the rotary drilling casing (306), a movable sound insulation sleeve (202) slidably sleeved outside the fixed sound insulation sleeve (201), and a telescopic sound insulation sleeve arranged outside the movable sound insulation sleeve (202), wherein the fixed sound insulation sleeve (201) is fixedly mounted on the lower side of the horizontal support plate (402) and is coaxial with the rotary drilling casing (306) and the soil storage cylinder (302); the movable sound insulation sleeve (202) is connected to the horizontal support plate (402) through an adjustment mechanism and moves up and down along the fixed sound insulation sleeve (201) under the action of the adjustment mechanism; the telescopic sound insulation sleeve comprises a telescopic mechanism and a sound insulation cloth (218) mounted on the telescopic mechanism, and under the control of the telescopic mechanism, the sound insulation cloth (218) contracts, folds, or stretches outside the movable sound insulation sleeve (202) to form a sound insulation sleeve; The bulldozer device comprises a bulldozer (107) slidably disposed in the soil storage barrel (302) and a bulldozer mechanism disposed between the soil storage barrel (302) and the rotary casing (306). The bulldozer mechanism drives the bulldozer (107) to move along the soil storage barrel (302) to push soil.

2. A noise reduction structure for a construction rotary drilling machine according to claim 1, characterized in that: The bulldozer (107) is connected to the drive shaft (301) via a threaded rod (108), a threaded hole is provided in the drive shaft (301), and the threaded rod (108) is threadedly installed in the threaded hole; the bulldozer mechanism comprises a cylinder (102) fixedly installed on the top surface of the soil storage barrel (302) via a cylinder seat (101), a grooved rod (103) rotatably installed on the cylinder arm of the cylinder (102), a gear (105) installed on the grooved rod (103), and a gear ring (307) arranged on the inner arm of the rotary casing (306); the grooved rod (103) extends into the soil storage barrel (302) and extends vertically along the barrel wall of the soil storage barrel (302) to the barrel bottom of the soil storage barrel (302); the gear (105) is located on the top surface of the soil storage barrel (302); a first spring (104) is installed between the grooved rod (103) and the gear (105), and the first spring (104) presses the gear (105) against the soil storage barrel (302) to prevent it from moving up and down, and the gear ring (307) is engaged with the gear (105). A key is also provided on the grooved rod (103). When the cylinder (102) drives the grooved rod (103) to move upward, the key enters the grooved rod (103) and rotates synchronously with the gear (105); a first pulley (106) is connected to the grooved rod (103) through a spline, and the first pulley (106) is rotatably installed in the soil storage barrel (302). The threaded rod (108) is connected to the first pulley (106) through a transmission belt (113), and when the driving shaft (301) drives the grooved rod (103) to rotate, the grooved rod (103) drives the threaded rod (108) to rotate and moves downward along the threaded hole in the driving shaft (301) so that the bulldozer (107) pushes soil downward along the soil storage barrel (302).

3. A noise reduction structure for a construction rotary drilling machine according to claim 1 or 2, characterized in that: The adjustment mechanism of the movable sound insulation sleeve (202) includes a first screw rod (203) and a first support rod (219) symmetrically arranged on the movable sound insulation sleeve (202), the lower end of the first screw rod (203) is rotatably connected to the movable sound insulation sleeve (202), the upper end of the first screw rod (203) extends out of the horizontal support plate (402), and is connected to the drive shaft (301) through a second transmission mechanism installed on the horizontal support rod (402), the drive shaft (301) controls the first screw rod (203) through the transmission mechanism to drive the movable sound insulation sleeve (202) to rise and fall, and the upper end of the first support rod (219) movably extends out of the horizontal support rod (402); the telescopic mechanism of the telescopic sound insulation sleeve includes a second screw rod (204), at least two second support rods (220), and a plurality of groups of slider assemblies evenly distributed around the sound insulation cloth (218) , multiple groups of slider assemblies are respectively slidably mounted on the second screw rod (204) and the lower part of the second support rod (220), each group of slider assemblies includes multiple overlapping sliders (205), the uppermost slider is fixedly connected to the horizontal support plate (402), the lowermost slider in the slider assembly mounted on the second screw rod (204) is rotatably connected to the bottom end of the second screw rod (204), and the lowermost slider in the slider assembly mounted on the second support rod (220) is fixedly connected to the bottom end of the second support rod (220); the upper ends of the second screw rod (204) and the second support rod (220) extend out of the horizontal support plate (402), and the second screw rod (204) is also connected to the drive shaft (301) through the second transmission mechanism, and the drive shaft (301) controls the second screw rod (204) through the transmission mechanism to drive the sound insulation cloth (218) to extend or retract.

4. A noise reduction structure for a construction rotary drilling machine according to claim 1 or 2, characterized in that: Two slots are provided on the rotary digging head (303), and a first digging shovel (304) and a second digging shovel (305) are fixedly mounted on the two slots.

5. A noise reduction structure for a construction rotary drilling machine according to claim 1 or 2, characterized in that: The rotary drilling casing (306) is made of a steel plate with a thickness of 4 to 8 mm, and one to two grouting holes are provided on the upper portion of the rotary drilling casing (306).

6. The noise reduction structure for a construction rotary drilling machine according to claim 2, characterized in that: The rotary drilling head (303) is disc-shaped and is rotatably connected to the lower barrel opening of the soil storage barrel (302); a movable plate (109) is slidably installed in the soil storage barrel (302); a fixed block (110) is installed on one side of the rotary drilling head (303); a curved sliding block (111) is provided on the side of the fixed block (110) adjacent to the barrel wall of the soil storage barrel (302); the curved sliding block (111) and the fixed block (111) are connected by a second spring (112); the fixed block (110) contacts the barrel wall of the soil storage barrel (302) through the curved surface of the curved sliding block (111); the rotary drilling head (303) and the soil storage barrel (302) are in contact with each other. ) is located between the fixed block (110) and the rotary digging head (303), the movable plate (109) is located above the fixed block (110), and the lower end of the grooved rod (103) contacts the movable plate (109), and under the action of the grooved rod (103), the movable plate (109) supports the arc-shaped slider (111) and the fixed block (110), and the rotary digging head (303) is used to completely cover the soil storage barrel (302); and when the grooved rod (103) moves upward, the movable plate (109) is no longer restricted, and the rotary digging head (303) can rotate to open the lower barrel opening of the soil storage barrel (302) for excavation.

7. The noise reduction structure for a construction rotary drilling machine according to claim 3, characterized in that: The second transmission mechanism comprises a second pulley (209) connected to the drive shaft (301) via a spline, a third pulley (212) threadedly sleeved on the first screw rod (203), a fourth pulley (215) threadedly sleeved on the second screw rod (204), an electric push rod (211) fixedly mounted on the horizontal support plate (402), and a moving rod (214) mounted on the cylinder arm of the electric push rod (211), wherein the second pulley (209), the third pulley (212), and the fourth pulley (215) are all rotatably mounted on the horizontal support plate (402). 02), the driving shaft (301) drives the second pulley (209) to rotate and slide inside the second pulley (209), a slideway (221) is provided between the third pulley (212) and the fourth pulley (215), the moving rod (214) is H-shaped, one free end of which is connected to the electric push rod (211), the middle cross bar is slidably connected to the slideway (221), and the other three free ends of the H-shaped moving rod (214) are respectively rotatably mounted with a fifth pulley (213), a sixth pulley (216) and a seventh pulley (217); on the second pulley (20 9) The outer periphery of the third pulley (212) and the fourth pulley (215) is provided with a movable belt (210) in a relaxed state, the electric push rod (211) and the movable rod (214) and the pulleys at each end of the movable rod are all placed in the movable belt (210), and after the movable rod (214) moves along the slideway (221) toward the fourth pulley (215), the third pulley (212), the fifth pulley (213), the sixth pulley (216), the seventh pulley (217), and the second pulley (209) support the movable belt (210) The first screw rod (203) is tightly driven, and at this time the fourth pulley (215) is separated from the movable belt (210); the movable rod (214) moves along the slideway (221) toward the third pulley (212) until the third pulley (212) is separated from the movable belt (210), and the fourth pulley (215) is in contact with the movable belt (210) for transmission, and the fourth pulley (215), the fifth pulley (213), the sixth pulley (216) and the second pulley (209) tighten the movable belt (210) to drive the second screw rod (204).

8. The noise reduction structure for a construction rotary drilling machine according to claim 3, characterized in that: A steel ring is fixedly installed on the sliders (205) on the same layer in the multiple groups of slider assemblies. An arc tube (208) is fixedly installed on the outside of each slider (205). Each layer of steel ring passes through the arc tube (208) of the slider (205) on the same layer and is fixed by the arc tube (208). The sound insulation cloth (218) is fixedly connected to each layer of steel ring to form a multi-layer sound insulation cloth tube. The multi-layer sound insulation cloth tube is connected as a whole to form a telescopic sound insulation cloth sleeve.

9. The noise reduction structure for a construction rotary drilling machine according to claim 3, characterized in that: The multiple sliders (205) of each slider assembly are mutually engaged, and a slot (206) is provided on the lower half of each slider (205). An elastic sheet (207) is fixedly mounted on the upper half of the slider (205). The elastic sheet (207) cooperates with the slot (206) of the slider of the upper layer to clamp each other. The elasticity of the elastic sheet (207) becomes weaker from top to bottom. When the second screw rod (204) rotates, the slider (205) at the lower end is driven to descend. At this time, the elastic sheet of the slider (205) at the lower end leaves the slot (206) of the slider of the upper layer, and the sound insulation cloth (218) is unfolded layer by layer from bottom to top during the descent process.

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