A sampling device for the investigation and design of municipal road bridges

Abstract

The present invention relates to the technical field of road exploration and sampling, and specifically relates to a sampling device for municipal road and bridge exploration and design, including a crawler vehicle, a sampling part, a soil drilling part, a pressing part and a hydraulic pump. The sampling part is rotatably arranged on the top of the crawler vehicle and penetrates through the crawler vehicle movably. The soil drilling part is fixedly arranged at the bottom of the sampling part, the pressing part is fixedly arranged at the top of the crawler vehicle, and the hydraulic pump is fixedly arranged at the top of the crawler vehicle. Through the setting of the sampling part, annular cracks can be constructed on the surface structure of the sampled core. After the crack structure is completed, the worker knocks on the outer wall of the sampling drill cylinder with a hammer. Under the action of vibration, the core located inside the inner tube of the guide crack slides downward, and at the same time, the vibration will cause the core to break along the guide crack, so that when sampling, multiple core samples with approximately the same length can be obtained, solving the technical problem that the lengths of the sampled cores are different in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of road exploration and sampling, and specifically to a sampling device for municipal road and bridge exploration and design. Background Technique

[0002] Road bridges generally consist of several major parts such as subgrade, pavement, bridge, road engineering, and traffic engineering facilities. Before the construction of a road bridge, it is necessary to conduct an exploration of the selected site of the road bridge. During the exploration, it is necessary to take samples of the soil at the selected site. According to a Chinese patent with the authorization announcement number: CN118243437B, a core sampling device and its sampling method are disclosed. By setting a blocking component, the number of single-target samples collected by the device is increased, and the reliability of sample data is improved;

[0003] After the above-mentioned drilling equipment samples, due to the relatively long length of the whole core, it is not convenient for sampling and collection. At the same time, the equipment does not have the technical means to set the fracture position of the core. Therefore, if the core is manually segmented, it is very difficult to ensure that the lengths of the core segments are roughly the same after fracture. For this reason, we propose a sampling device for municipal road and bridge exploration and design to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solutions: A sampling device for municipal road and bridge exploration and design, comprising:

[0005] A crawler vehicle;

[0006] A sampling part, rotatably arranged on the top of the crawler vehicle and movably penetrating through the crawler vehicle, and the sampling part is used for road exploration and sampling;

[0007] A soil drilling part, fixedly arranged at the bottom of the sampling part, and the soil drilling part is used for fixing the core;

[0008] A pressing part, fixedly arranged on the top of the crawler vehicle, and the crawler vehicle is used for the up and down drive of the sampling part and the soil drilling part;

[0009] A hydraulic pump machine, fixedly arranged on the top of the crawler vehicle, and the hydraulic pump machine is used for the torsional drive of the sampling part and the soil drilling part.

[0010] As a preferred solution of the present invention, the sampling part includes:

[0011] A sampling drill barrel, and an inner cavity is opened inside the sampling drill barrel;

[0012] A guide crack inner tube, rotatably installed inside the inner cavity, and a plurality of telescopic holes are equidistantly distributed up and down on the inner wall of the guide crack inner tube;

[0013] A crack-making steel cone, slidably installed inside the telescopic hole and used for guiding the crack of the core for sampling;

[0014] An annular sliding cavity is opened inside the sampling drill pipe. It is arranged in multiple upper and lower layers, and the distance between adjacent upper and lower annular sliding cavities is equal.

[0015] An annular tightening hoop is slidably installed inside the annular sliding cavity. The inner side of the annular tightening hoop is set as an increasing conical surface that gradually widens upward, and the inner side of the annular tightening hoop abuts against the end of the seam-making steel cone.

[0016] As a preferred solution of the present invention, the sampling part further includes:

[0017] Sliding holes are opened on both sides of the top of the sampling drill pipe, penetrate through the inside of the sampling drill pipe, and extend to the bottom of the sampling drill pipe.

[0018] A first ejector rod is slidably installed inside the sliding hole, and the annular tightening hoop is fixedly installed on the outer wall of the first ejector rod.

[0019] A piston is fixedly installed on the top of the outer wall of the first ejector rod.

[0020] A cylinder head is fixedly installed on the top of the sampling drill pipe. Oil cylinder chambers are opened on both sides of the top of the cylinder head. The oil cylinder chambers are located at the top of the sliding holes. The first ejector rod extends into the oil cylinder chambers, and the outer wall of the piston is slidably connected to the inner wall of the oil cylinder chambers.

[0021] An oil injection pipe is fixedly installed on the top of the cylinder head, and the inside of the oil injection pipe is communicated with the inside of the oil cylinder chambers.

[0022] A torsion rod is fixedly installed at the center of the top of the cylinder head.

[0023] As a preferred solution of the present invention, the sampling part further includes:

[0024] A first hydraulic motor is fixedly installed on the top of the sampling drill pipe and is located inside the cylinder head. The output shaft of the first hydraulic motor penetrates through the sampling drill pipe and extends into its interior, and the bottom of the output shaft of the first hydraulic motor is fixedly connected to the top of the guide fracture inner pipe.

[0025] A reset sliding cavity is opened on the inner wall of the telescopic hole, and its aperture is larger than that of the telescopic hole. The reset sliding cavity is concentric with the center of the telescopic hole.

[0026] A reset ring is slidably installed inside the reset sliding cavity and is fixedly installed on the outer wall of the seam-making steel cone.

[0027] A first reset spring is sleeved around the seam-making steel cone and is fixedly installed between one side of the reset ring and one inner end face of the reset sliding cavity.

[0028] As a preferred solution of the present invention, the soil drilling part includes:

[0029] The soil drilling pipe is fixedly installed at the bottom of the sampling drill barrel;

[0030] The annular groove is formed on the inner wall of the soil drilling pipe;

[0031] The sliding groove is formed on both inner sides of the soil drilling pipe and is communicated with the inside of the annular groove;

[0032] The push-pull slider is slidably installed inside the sliding groove;

[0033] The arc-shaped torque-limiting pressure plate is fixedly installed at one end of the push-pull slider close to the center of the soil drilling pipe, and the arc of the arc-shaped torque-limiting pressure plate fits the arc of the annular groove.

[0034] As a preferred solution of the present invention, the soil drilling part further includes:

[0035] The guide through hole is formed at the top of the soil drilling pipe and extends to the inside of the sliding groove, and the guide through hole is located at the bottom of the sliding hole;

[0036] The second ejector rod is slidably installed inside the guide through hole and extends to the inside of the sliding groove;

[0037] The buffer spring is located inside the sliding hole and is fixedly installed between the bottom of the first ejector rod and the top of the second ejector rod;

[0038] The thrust plate is fixedly installed at the bottom of the second ejector rod. The outer wall of the thrust plate is slidably connected to the inner wall of the sliding groove, and the bottom of the thrust plate abuts against the top inclined surface of the push-pull slider.

[0039] As a preferred solution of the present invention, the soil drilling part further includes:

[0040] The second return spring is located inside the sliding groove and is fixedly installed between one side surface of the push-pull slider away from the arc-shaped torque-limiting pressure plate and one inner wall of the sliding groove;

[0041] The soil-breaking teeth are installed at the bottom of the soil drilling pipe, and the number of the soil-breaking teeth is multiple. The multiple soil-breaking teeth are distributed in a circumferential array.

[0042] As a preferred solution of the present invention, the pressing part includes:

[0043] The light columns are vertically and fixedly installed on the top of the crawler vehicle and are distributed front and back;

[0044] The guide seat is slidably installed on the outer walls of the front and rear light columns;

[0045] The second hydraulic motor is fixedly installed on the top of the guide seat and is located between the front and rear light columns. The output shaft of the second hydraulic motor movably penetrates through the guide seat and extends to the periphery of its bottom. The bottom of the output shaft of the second hydraulic motor is fixedly connected to the top of the torsion rod.

[0046] As a preferred embodiment of the present invention, the pressing part further includes:

[0047] A taper block fixedly installed on the tops of two light columns;

[0048] A cylinder rod fixedly installed between the bottom of the taper block and the top of the crawler vehicle;

[0049] A connecting plate fixedly installed on a side surface of the guide seat close to the cylinder rod;

[0050] A rodless cylinder fixedly installed inside the connecting plate and slidably installed around the cylinder rod.

[0051] As a preferred embodiment of the present invention, the output end of the hydraulic pump is connected to the input end of the second hydraulic motor and the input end of the first hydraulic motor through oil pipes, and the output end of the hydraulic pump is connected to two injection oil pipes through a universal oil circuit joint.

[0052] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0053] 1. In the present invention, the first ejector rod of the sampling part slides downward to further drive the annular tightening hoop and the buffer spring to move downward. When the annular tightening hoop moves downward, its inner side will exert a thrust on the end of the seam-making steel cone, pushing the seam-making steel cone out of the inside of the telescopic hole, so that the tip of the seam-making steel cone exerts an extrusion force on the core, causing cracks on the surface of the core. Moreover, the output shaft of the first hydraulic motor drives the inner pipe of the guide crack to rotate, and the inner pipe of the guide crack rotates to drive the seam-making steel cone to rotate together through the torsion rod. And since the annular tightening hoop is annularly arranged, during the rotation of the telescopic hole along with the inner pipe of the guide crack, the thrust exerted by the inner side of the annular tightening hoop on the end of the seam-making steel cone is uninterrupted, thereby constructing an annular crack on the outer wall of the core. After the crack is constructed, the worker knocks on the outer wall of the sampling drill barrel with a hammer. Under the shock, the core located inside the inner pipe of the guide crack slides downward, and at the same time, the shock will cause the core to break along the guide crack, so that when sampling, multiple core samples with approximately the same length can be obtained, solving the technical problem in the prior art that the lengths of the sampled cores are different.

[0054] 2. In the present invention, when the piston pushes the first ejector rod to move downward, through the connection of the buffer spring, it also drives the second ejector rod and the thrust plate to move together, resulting in a wedging force of the thrust plate on the push-pull slider, pushing the push-pull slider towards the center of the drill pipe. The movement of the push-pull slider further drives the arc-shaped torque-limiting pressing plate to move together, so that the inner arc surface of the arc-shaped torque-limiting pressing plate tightly adheres to the outer wall of the core, fixing the core, ensuring that the core will not twist during the process of guiding the crack in the core, and thus ensuring the smoothness of the core crack guiding. Description of the Drawings

[0055] Figure 1 is a schematic structural diagram of the present invention;

[0056] Figure 2 In the present invention Figure 1 is a schematic diagram of the partial structure;

[0057] Figure 3 is a schematic structural diagram of the sampling part and the soil drilling part of the present invention;

[0058] Figure 4 is a schematic structural diagram of the bottom view of the sampling part and the soil drilling part of the present invention;

[0059] Figure 5 is a schematic side-sectional structural diagram of the sampling drill tube of the present invention;

[0060] Figure 6 is a schematic sectional structural diagram of the annular sliding cavity of the present invention;

[0061] Figure 7 is a schematic structural diagram of the guiding crack inner tube of the present invention;

[0062] Figure 8 In the present invention Figure 7 is an enlarged schematic structural diagram of part A;

[0063] Figure 9 is a schematic side-sectional structural diagram of the soil drilling tube of the present invention;

[0064] Figure 10 is a schematic structural diagram of the bottom view of the annular tightening hoop of the present invention.

[0065] In the figure: 100, crawler vehicle; 200, sampling part; 201, sampling drill tube; 202, inner cavity; 203, guiding crack inner tube; 204, telescopic hole; 205, seam-forming steel cone; 206, annular sliding cavity; 207, annular tightening hoop; 208, sliding hole; 209, first ejector rod; 2010, piston; 2011, cylinder head; 2012, oil cylinder chamber; 2013, oil injection pipe; 2014, torsion joint rod; 2015, first hydraulic motor; 2016, reset sliding cavity; 2017, reset ring; 2018, first reset spring; 300, soil drilling part; 301, soil drilling tube; 302, annular groove; 303, sliding groove; 304, push-pull slider; 305, arc-shaped torque-limiting pressing plate; 306, guiding through hole; 307, second ejector rod; 308, buffer spring; 309, thrust plate; 3010, second reset spring; 3011, soil-breaking tooth; 400, pressing-down part; 401, light column; 402, guiding seat; 403, second hydraulic motor; 404, push-pull block; 405, cylinder rod; 406, connecting plate; 407, rodless cylinder; 500, hydraulic pump unit. Detailed implementation manners

[0066] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0067] Please refer to Figures 1 to 10 , the technical solutions provided by the present invention specifically include the following embodiments:

[0068] A sampling device for municipal road bridge survey and design includes a crawler vehicle 100, a sampling part 200, a soil drilling part 300, a pressing part 400 and a hydraulic pump 500. The sampling part 200 is rotatably arranged on the top of the crawler vehicle 100 and penetrates through the crawler vehicle 100 movably. The sampling part 200 is used for road survey sampling. The soil drilling part 300 is fixedly arranged at the bottom of the sampling part 200. The pressing part 400 is fixedly arranged on the top of the crawler vehicle 100. The crawler vehicle 100 is used for driving the sampling part 200 and the soil drilling part 300 up and down. The hydraulic pump 500 is fixedly arranged on the top of the crawler vehicle 100. The hydraulic pump 500 is used for driving the sampling part 200 and the soil drilling part 300 to twist.

[0069] Further, specifically refer to Figures 2 to 10 as shown in

[0070] The sampling section 200 includes a sampling drill pipe 201, an inner cavity 202, a fracture guiding inner pipe 203, telescopic holes 204, a fracture forming steel cone 205, an annular sliding cavity 206, an annular tightening hoop 207, sliding holes 208, a first ejector rod 209, a piston 2010, a cylinder head 2011, an oil cylinder chamber 2012, an oil injection pipe 2013, a torsion connecting rod 2014, a first hydraulic motor 2015, a reset sliding cavity 2016, a reset ring 2017, and a first reset spring 2018. An inner cavity 202 is provided inside the sampling drill pipe 201. The fracture guiding inner pipe 203 is rotatably installed inside the inner cavity 202. A plurality of telescopic holes 204 are equidistantly distributed up and down on the inner wall of the fracture guiding inner pipe 203. The fracture forming steel cone 205 is slidably installed inside the telescopic holes 204 and is used for the core fracture of sampling. The annular sliding cavity 206 is provided inside the upper part of the sampling drill pipe 201, which is divided into multiple layers up and down, and the distance between adjacent upper and lower annular sliding cavities 206 is constant. The annular tightening hoop 207 is slidably installed inside the annular sliding cavity 206. The inner side surface of the annular tightening hoop 207 is set as an increasing conical surface that gradually widens upward. The inner side surface of the annular tightening hoop 207 abuts against the end of the fracture forming steel cone 205. The sliding holes 208 are provided on both sides of the top of the sampling drill pipe 201 and penetrate through the inside of the sampling drill pipe 201 and extend to the bottom of the sampling drill pipe 201. The first ejector rod 209 is slidably installed inside the sliding holes 208. The annular tightening hoop 207 is fixedly installed on the outer wall of the first ejector rod 209. The piston 2010 is fixedly installed on the top of the outer wall of the first ejector rod 209. The cylinder head 2011 is fixedly installed on the top of the sampling drill pipe 201. Oil cylinder chambers 2012 are provided on both sides of the top of the cylinder head 2011. The oil cylinder chambers 2012 are located at the top of the sliding holes 208. The first ejector rod 209 extends movably into the inside of the oil cylinder chambers 2012. The outer wall of the piston 2010 is slidably connected to the inner wall of the oil cylinder chambers 2012. The oil injection pipe 2013 is fixedly installed on the top of the cylinder head 2011, and the inside of the oil injection pipe 2013 is communicated with the inside of the oil cylinder chambers 2012. The torsion connecting rod 2014 is fixedly installed at the center of the top of the cylinder head 2011. The first hydraulic motor 2015 is fixedly installed on the top of the sampling drill pipe 201 and is located inside the cylinder head 2011. The output shaft of the first hydraulic motor 2015 movably penetrates through the sampling drill pipe 201 and extends to its inside, and the bottom of the output shaft of the first hydraulic motor 2015 is fixedly connected to the top of the fracture guiding inner pipe 203. The reset sliding cavity 2016 is provided on the inner wall of the telescopic holes 204, and its aperture is larger than that of the telescopic holes 204. The reset sliding cavity 2016 is concentric with the center of the telescopic holes 204. The reset ring 2017 is slidably installed inside the reset sliding cavity 2016 and is fixedly installed on the outer wall of the fracture forming steel cone 205. The first reset spring 2018 is sleeved around the fracture forming steel cone 205 and is fixedly installed between one side surface of the reset ring 2017 and one side inner end surface of the reset sliding cavity 2016;

[0071] The output end of the hydraulic pump 500 is connected to the input end of the second hydraulic motor 403 and the input end of the first hydraulic motor 2015 through oil pipes, and the output end of the hydraulic pump 500 is connected to the two injection oil pipes 2013 through a universal oil circuit joint.

[0072] Specifically, the pressing part 400 drives the sampling part 200 and the soil drilling part 300 to move downward, and at the same time drives the sampling part 200 and the soil drilling part 300 to rotate, so that the sampling part 200 and the soil drilling part 300 are integrally inserted into the soil for sampling. After sampling, the pressing part 400 drives the sampling part 200 and the soil drilling part 300 to reset upward, pulls out the sampling part 200 and the soil drilling part 300 from the soil, and brings out the sampled core together. After the sampled core is taken out, the hydraulic pump 500 supplies oil to the inside of the two oil cylinder chambers 2012 through the two oil injection pipes 2013, resulting in an increase in the oil pressure inside the two oil cylinder chambers 2012, and pushing the two pistons 2010 downward. During the downward push of the two pistons 2010, the two first ejector rods 209 are driven to slide downward along the two sliding holes 208. The downward sliding of the first ejector rods 209 further drives the annular tightening hoop 207 to move downward. When the annular tightening hoop 207 moves downward, its inner side will exert a thrust on the end of the seam-forming steel cone 205, pushing the seam-forming steel cone 205 out of the inside of the telescopic hole 204, so that the pointed end of the seam-forming steel cone 205 exerts an extrusion force on the core. At the same time, the seam-forming steel cone 205 also drives the reset ring 2017 to move together, causing the first reset spring 2018 to be stretched and store energy, thereby providing the elastic potential energy for the reset of the reset ring 2017 and the seam-forming steel cone 205. The pointed end of the seam-forming steel cone 205 squeezes the outer wall of the core to form a seam on the outer wall of the core. As the hydraulic pump 500 continues to supply oil to the inside of the oil cylinder chamber 2012, the oil pressure inside the oil cylinder chamber 2012 continues to increase, that is, the force of the piston 2010 pushing the first ejector rod 209 downward increases, further increasing the thrust exerted by the annular tightening hoop 207 on the end of the seam-forming steel cone 205, and increasing the crushing force of the pointed end of the seam-forming steel cone 205 on the outer wall of the core, causing cracks to occur on the outer wall of the core along the crushing position of the seam-forming steel cone 205. At the same time, the hydraulic pump 500 also supplies oil to the first hydraulic motor 2015, so that its output shaft drives the guide crack inner tube 203 to rotate. The rotation of the guide crack inner tube 203 also drives the seam-forming steel cone 205 to rotate together through the torsion rod 2014. And because the annular tightening hoop 207 is annularly arranged, during the rotation of the telescopic hole 204 with the guide crack inner tube 203, the thrust exerted by the inner side of the annular tightening hoop 207 on the end of the seam-forming steel cone 205 is continuous, so as to construct an annular crack on the outer wall of the core. After the crack is constructed, the worker knocks on the outer wall of the sampling drill barrel 201 with a hammer. Under the shock, the core located inside the guide crack inner tube 203 slides downward, and at the same time the shock will cause the core to break along the guide crack, so that when sampling, multiple core samples with approximately the same length can be obtained, solving the technical problem of different lengths of the sampled cores in the prior art.

[0073] Further, specifically refer to Figures 4 to 6 and Figure 9 as shown in:

[0074] The soil drilling part 300 includes a soil drilling pipe 301, an annular groove 302, a sliding groove 303, a tapered slider 304, an arc-shaped torque-limiting pressure plate 305, a guide through-hole 306, a second ejector rod 307, a buffer spring 308, a thrust plate 309 and a second return spring 3010. The soil drilling pipe 301 is fixedly installed at the bottom of the sampling drill barrel 201. The annular groove 302 is opened on the inner wall of the soil drilling pipe 301. The sliding grooves 303 are opened on both sides inside the soil drilling pipe 301 and are connected to the inside of the annular groove 302. The tapered slider 304 is slidably installed inside the sliding groove 303. The arc-shaped torque-limiting pressure plate 305 is fixedly installed at one end of the tapered slider 304 close to the center of the soil drilling pipe 301, and the arc of the arc-shaped torque-limiting pressure plate 305 fits the arc of the annular groove 302. The guide through-hole 306 is opened at the top of the soil drilling pipe 301 and extends to the inside of the sliding groove 303. The guide through-hole 306 is located at the bottom of the sliding hole 208. The second ejector rod 307 is slidably installed inside the guide through-hole 306 and extends to the inside of the sliding groove 303. The buffer spring 308 is located inside the sliding hole 208 and is fixedly installed between the bottom of the first ejector rod 209 and the top of the second ejector rod 307. The thrust plate 309 is fixedly installed at the bottom of the second ejector rod 307. The outer wall of the thrust plate 309 is slidably connected to the inner wall of the sliding groove 303, and the bottom of the thrust plate 309 abuts against the top inclined surface of the tapered slider 304. The second return spring 3010 is located inside the sliding groove 303 and is fixedly installed between one side surface of the tapered slider 304 away from the arc-shaped torque-limiting pressure plate 305 and one side inner wall of the sliding groove 303. The soil-breaking teeth 3011 are installed at the bottom of the soil drilling pipe 301, and the number of them is multiple. The multiple soil-breaking teeth 3011 are distributed in a circumferential array.

[0075] Specifically, during the process that the piston 2010 pushes the first ejector rod 209 to move downward, through the connection of the buffer spring 308, the second ejector rod 307 is driven to move together with the thrust plate 309, resulting in a wedging force of the thrust plate 309 on the tapered slider 304, and the tapered slider 304 is pushed towards the direction close to the center of the soil drilling pipe 301. The movement of the tapered slider 304 further drives the arc-shaped torque-limiting pressure plate 305 to move together, so that the inner arc surface of the arc-shaped torque-limiting pressure plate 305 tightly adheres to the outer wall of the core, fixing the core and ensuring that the core will not twist during the process of guiding cracks in the core, thus ensuring the smoothness of guiding cracks in the core.

[0076] Further, specifically refer to Figure 2 as shown in

[0077] The pressing-down part 400 includes a light column 401, a guiding seat 402, a second hydraulic motor 403, a taper block 404, a cylinder rod 405, a connecting plate 406 and a rodless cylinder 407. The light column 401 is vertically and fixedly installed on the top of the crawler vehicle 100 and is distributed front and back. The guiding seat 402 is slidably installed on the outer walls of the front and back light columns 401. The second hydraulic motor 403 is fixedly installed on the top of the guiding seat 402 and is located between the front and back light columns 401. The output shaft of the second hydraulic motor 403 movably penetrates through the guiding seat 402 and extends to the periphery of its bottom. The bottom of the output shaft of the second hydraulic motor 403 is fixedly connected to the top of the twisting rod 2014. The taper block 404 is fixedly installed on the tops of the two light columns 401. The cylinder rod 405 is fixedly installed between the bottom of the taper block 404 and the top of the crawler vehicle 100. The connecting plate 406 is fixedly installed on the side surface of the guiding seat 402 close to the cylinder rod 405. The rodless cylinder 407 is fixedly installed inside the connecting plate 406 and is slidably installed around the cylinder rod 405.

[0078] Specifically, by moving the crawler vehicle 100, the sampling part 200, the soil drilling part 300, the pressing-down part 400 and the hydraulic pump 500 are moved to the sampling position. The hydraulic pump 500 supplies oil to the rodless cylinder 407, causing the rodless cylinder 407 to move downward along the cylinder rod 405, driving the connecting plate 406 and the guiding seat 402 to move together. The downward movement of the guiding seat 402 is guided by the front and back light columns 401 and can move more smoothly and stably. The downward movement of the guiding seat 402 drives the sampling part 200 and the soil drilling part 300 to move downward as a whole. At the same time, the hydraulic pump 500 also supplies oil to the inside of the second hydraulic motor 403, causing the output shaft of the second hydraulic motor 403 to drive the sampling part 200 and the soil drilling part 300 to rotate as a whole. With the cooperation of the downward pushing action of the guiding seat 402, the sampling part 200 and the soil drilling part 300 are inserted into the soil for sampling. After sampling, the hydraulic pump 500 supplies oil to drive the rodless cylinder 407 to move upward along the cylinder rod 405, and further drives the sampling part 200 and the soil drilling part 300 to move upward together through the guiding seat 402, extracting them from the soil and bringing out the sampled core together.

[0079] When a sampling device for the survey and design of municipal road bridges in this solution is working, it moves through the crawler vehicle 100 to move the sampling part 200, the soil drilling part 300, the pressing part 400 and the hydraulic pump 500 to the sampling position. The hydraulic pump 500 supplies oil to the rodless cylinder 407, so that the rodless cylinder 407 moves downward along the cylinder rod 405, driving the connecting plate 406 and the guide seat 402 to move together. When the guide seat 402 moves downward, it is guided by the front and rear light columns 401 and can move more smoothly and stably. When the guide seat 402 moves downward, it drives the sampling part 200 and the soil drilling part 300 to move downward as a whole. At the same time, the hydraulic pump 500 also supplies oil to the inside of the second hydraulic motor 403, so that the output shaft of the second hydraulic motor 403 drives the sampling part 200 and the soil drilling part 300 to rotate as a whole. With the downward pushing action of the guide seat 402 on it, the sampling part 200 and the soil drilling part 300 are inserted into the soil for sampling. After sampling, the hydraulic pump 500 supplies oil to drive the rodless cylinder 407 to move upward along the cylinder rod 405, and further drives the sampling part 200 and the soil drilling part 300 to move upward together through the guide seat 402, and is pulled out from the soil, and the sampled rock core is also taken out together;

[0080] After the sampled core is taken out, the hydraulic pump 500 supplies oil to the inside of the two oil cylinder chambers 2012 through two oil injection pipes 2013, resulting in an increase in the oil pressure inside the two oil cylinder chambers 2012, pushing the two pistons 2010 downward. During the downward movement of the two pistons 2010, the two first ejector rods 209 are driven to slide downward along the two sliding holes 208. The downward sliding of the first ejector rods 209 further drives the annular tightening hoop 207 and the buffer spring 308 to move downward. When the annular tightening hoop 207 moves downward, its inner side will exert a thrust on the end of the seam-making steel cone 205, pushing the seam-making steel cone 205 out of the inside of the telescopic hole 204, so that the tip of the seam-making steel cone 205 exerts an extrusion force on the core. At the same time, the seam-making steel cone 205 also drives the reset ring 2017 to move together, causing the first reset spring 2018 to be stretched and store energy, thereby providing the elastic potential energy for the reset of the reset ring 2017 and the seam-making steel cone 205. The tip of the seam-making steel cone 205 extrudes the outer wall of the core to form a seam on the outer wall of the core. As the hydraulic pump 500 continues to supply oil to the inside of the oil cylinder chamber 2012, the oil pressure inside the oil cylinder chamber 2012 continues to increase, that is, the force of the piston 2010 pushing the first ejector rod 209 downward increases, further increasing the thrust exerted by the annular tightening hoop 207 on the end of the seam-making steel cone 205, and increasing the crushing force of the tip of the seam-making steel cone 205 on the outer wall of the core, so that a crack is generated on the outer wall of the core along the crushing position of the seam-making steel cone 205. At the same time, the hydraulic pump 500 also supplies oil to the first hydraulic motor 2015, so that its output shaft drives the guide crack inner pipe 203 to rotate. The rotation of the guide crack inner pipe 203 also drives the seam-making steel cone 205 to rotate together through the torsion rod 2014. And because the annular tightening hoop 207 is annularly arranged, during the rotation of the telescopic hole 204 along with the guide crack inner pipe 203, the thrust exerted by the inner side of the annular tightening hoop 207 on the end of the seam-making steel cone 205 is continuous, so as to construct an annular crack on the outer wall of the core. After the crack is constructed, the worker knocks on the outer wall of the sampling drill cylinder 201 with a hammer. Under the shock, the core located inside the guide crack inner pipe 203 slides downward, and at the same time, the shock will cause the core to break along the guide crack, so that when sampling, multiple core samples with approximately the same length can be obtained, solving the technical problem that the lengths of the sampled cores are different in the prior art;

[0081] It should be noted that the downward movement of the buffer spring 308 drives the second ejector rod 307 and the thrust plate 309 to move together, resulting in a wedging force of the thrust plate 309 on the push-pull slider 304, pushing the push-pull slider 304 in the direction close to the center of the drill pipe 301. The movement of the push-pull slider 304 further drives the arc-shaped torque-limiting pressure plate 305 to move together, so that the inner arc surface of the arc-shaped torque-limiting pressure plate 305 tightly adheres to the outer wall of the core to fix the core, ensuring that the core will not twist during the process of guiding the crack of the core, thereby ensuring the smoothness of the core guiding crack.

[0082] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A sampling device for municipal road and bridge survey and design, characterized in that: Comprising: A crawler vehicle (100); A sampling unit (200), rotatably arranged on the top of the crawler vehicle (100) and movably penetrating the crawler vehicle (100), the sampling unit (200) being used for road survey sampling, and the sampling unit (200) comprising: A sampling drill barrel (201), an inner cavity (202) being formed inside the sampling drill barrel (201); A guide crack inner tube (203), rotatably installed inside the inner cavity (202), a plurality of vertically equally spaced telescopic holes (204) being formed in the inner wall of the guide crack inner tube (203); A crack - making steel cone (205), slidably installed inside the telescopic hole (204) and used for the core guide crack of sampling; An annular sliding cavity (206), formed inside the upper part of the sampling drill barrel (201), being arranged in multiple layers up and down, and the distance between adjacent upper and lower annular sliding cavities (206) being constant; An annular tightening hoop (207), slidably installed inside the annular sliding cavity (206), the inner side surface of the annular tightening hoop (207) being arranged as an increasing conical surface that gradually widens upwards, and the inner side surface of the annular tightening hoop (207) abutting against the end of the crack - making steel cone (205); The sampling unit (200) further comprises: Sliding holes (208), formed on both sides of the top of the sampling drill barrel (201) and penetrating through the inside of the sampling drill barrel (201) to extend to the bottom of the sampling drill barrel (201); A first ejector rod (209), slidably installed inside the sliding hole (208), the annular tightening hoop (207) being fixedly installed on the outer wall of the first ejector rod (209); A piston (2010), fixedly installed on the top of the outer wall of the first ejector rod (209); A cylinder head (2011), fixedly installed on the top of the sampling drill barrel (201), oil cylinder chambers (2012) being formed on both sides of the top of the cylinder head (2011), the oil cylinder chambers (2012) being located at the top of the sliding holes (208), the first ejector rod (209) extending movably into the inside of the oil cylinder chambers (2012), and the outer wall of the piston (2010) being slidably connected to the inner wall of the oil cylinder chambers (2012); An oil injection pipe (2013), fixedly installed on the top of the cylinder head (2011), and the inside of the oil injection pipe (2013) being communicated with the inside of the oil cylinder chambers (2012); A torsion rod (2014), fixedly installed at the center of the top of the cylinder head (2011); The sampling unit (200) further comprises: A first hydraulic motor (2015), fixedly installed on the top of the sampling drill barrel (201) and located inside the cylinder head (2011), the output shaft of the first hydraulic motor (2015) movably penetrating the sampling drill barrel (201) and extending into its inside, and the bottom of the output shaft of the first hydraulic motor (2015) being fixedly connected to the top of the guide crack inner tube (203); A reset sliding cavity (2016), formed on the inner wall of the telescopic hole (204) and having a larger aperture than that of the telescopic hole (204), the reset sliding cavity (2016) being concentric with the center of the telescopic hole (204); The reset ring (2017) is slidably installed inside the reset sliding cavity (2016) and fixedly installed on the outer wall of the seam - creating steel cone (205). The first reset spring (2018) is sleeved around the seam - creating steel cone (205) and fixedly installed between one side surface of the reset ring (2017) and one inner end surface of the reset sliding cavity (2016). The soil - drilling part (300) is fixedly arranged at the bottom of the sampling part (200). The soil - drilling part (300) is used for fixing the core. The soil - drilling part (300) includes: The soil - drilling pipe (301) is fixedly installed at the bottom of the sampling drill cylinder (201). The annular groove (302) is opened on the inner wall of the soil - drilling pipe (301). The sliding grooves (303) are opened on both inner sides of the soil - drilling pipe (301) and are connected to the inside of the annular groove (302). The push - pull slider (304) is slidably installed inside the sliding groove (303). The arc - shaped torque - limiting pressing plate (305) is fixedly installed at one end of the push - pull slider (304) close to the center of the circle of the soil - drilling pipe (301), and the arc of the arc - shaped torque - limiting pressing plate (305) fits the arc of the annular groove (302). The soil - drilling part (300) further includes: The guide through - hole (306) is opened at the top of the soil - drilling pipe (301) and extends to the inside of the sliding groove (303). The guide through - hole (306) is located at the bottom of the sliding hole (208). The second ejector rod (307) is slidably installed inside the guide through - hole (306) and extends to the inside of the sliding groove (303). The buffer spring (308) is located inside the sliding hole (208) and is fixedly installed between the bottom of the first ejector rod (209) and the top of the second ejector rod (307). The thrust plate (309) is fixedly installed at the bottom of the second ejector rod (307). The outer wall of the thrust plate (309) is slidably connected to the inner wall of the sliding groove (303), and the bottom of the thrust plate (309) abuts against the top inclined surface of the push - pull slider (304). The soil - drilling part (300) further includes: The second reset spring (3010) is located inside the sliding groove (303) and is fixedly installed between one side surface of the push - pull slider (304) away from the arc - shaped torque - limiting pressing plate (305) and one inner wall of the sliding groove (303). The soil - breaking teeth (3011) are installed at the bottom of the soil - drilling pipe (301), and the number of the soil - breaking teeth (3011) is multiple. The multiple soil - breaking teeth (3011) are distributed in a circumferential array. The downward - pressing part (400) is fixedly arranged on the top of the crawler vehicle (100). The crawler vehicle (100) is used for driving the sampling part (200) and the soil - drilling part (300) up and down. The hydraulic pump (500) is fixedly arranged on the top of the crawler vehicle (100). The hydraulic pump (500) is used for driving the sampling part (200) and the soil - drilling part (300) to twist.

2. The sampling device for municipal road and bridge survey and design according to claim 1, wherein: The downward - pressing part (400) includes: The light columns (401) are vertically and fixedly installed on the top of the crawler vehicle (100) and are distributed front - to - back. The guiding seat (402) is slidably installed on the outer walls of the front and rear light columns (401). The second hydraulic motor (403) is fixedly installed on the top of the guiding seat (402) and is located between the front and rear light columns (401). The output shaft of the second hydraulic motor (403) movably penetrates the guiding seat (402) and extends to the periphery of its bottom. The bottom of the output shaft of the second hydraulic motor (403) is fixedly connected to the top of the torsion rod (2014).

3. The sampling device for municipal road and bridge investigation and design according to claim 2, wherein: The pressing part (400) further includes: The push-pull block (404) is fixedly installed on the tops of the two light columns (401). The cylinder rod (405) is fixedly installed between the bottom of the push-pull block (404) and the top of the crawler vehicle (100). The connecting plate (406) is fixedly installed on the side surface of the guiding seat (402) close to the cylinder rod (405). The rodless cylinder (407) is fixedly installed inside the connecting plate (406) and is slidably installed on the periphery of the cylinder rod (405).

4. The sampling device for municipal road and bridge investigation and design according to claim 3, wherein: The output end of the hydraulic pump (500) is connected to the input end of the second hydraulic motor (403) and the input end of the first hydraulic motor (2015) through oil pipes, and the output end of the hydraulic pump (500) is connected to the two injection oil pipes (2013) through a universal oil circuit joint.

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