Earth and rockfill dam piezometric tube device with desilting function

Abstract

The invention provides an earth and rockfill dam piezometric tube device with a desilting function, and relates to the technical field of hydraulic engineering safety monitoring equipment. The earth and rockfill dam piezometric tube device with the desilting function comprises a piezometric tube body, a magnetic stirring structure is arranged at the lower end of the piezometric tube body, a desilting structure is arranged at the upper end of the piezometric tube body, the magnetic stirring structure comprises a servo motor, and a first partition plate is arranged in the piezometric tube body at the upper end of the servo motor. The lower end face of the first partition plate is fixedly connected with a first sealing bearing, and the upper end of the first sealing bearing penetrates through the lower end face of the first partition plate to the upper end face of the first partition plate. Fine particles deposited at the bottom of the hole and water in the pipe are fully mixed and stirred through the magnetic stirring structure to form muddy water, sewage is continuously pumped out through the dredging structure to be filtered and then injected into the pipe body of the piezometric pipe, water is repeatedly pumped out till clear water is pumped out, and the dredging work of the piezometric pipe can be completed.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy project safety monitoring equipment, in particular to an earth-rock dam pressure measuring tube device with a self-silting function. Background Art

[0002] The piezometer is an important safety monitoring facility in water conservancy projects. Based on the observation data of the water level of the piezometer of the earth-rock dam, the water level infiltration line of the monitoring section of the earth-rock dam is drawn, which can make judgments and early warnings on the seepage state and hidden dangers of the dam during operation, and plays an important role in ensuring the stability and safety of the earth-rock dam. The diameter of the piezometer of the earth-rock dam is relatively thin, generally 50 to 100 mm, and it is buried deeper, generally at a depth of more than 20 m. The piezometer is generally composed of a permeable flower pipe and a conduit. The outside of the permeable flower pipe is wrapped with non-woven geotextile, and the filter material is backfilled around the pipe.

[0003] However, during use, fine soil particles in the dam body can still pass through the filter material under the action of seepage and stick to the surface of the geotextile, affecting the hydraulic connectivity. Some small soil particles even enter the pressure measuring tube and cause siltation in the tube, so that the sensitivity of the water level sensor placed in the pressure measuring tube decreases year by year, affecting the accurate collection of data and even losing the pressure measuring effect, posing a huge hidden danger to the safety of the project. The commonly used pressure measuring tubes for earth-rock dams do not have the silt removal function. The silt removal in the pressure measuring tube is usually carried out by flushing with a high-pressure water pump, scooping out from the spiral drill pipe, and dredging with a pipeline dredging machine. The cleaning is time-consuming, labor-intensive, and costly, and the silt removal effect is not ideal. The fine soil particles inside the filter material and on the surface of the geotextile cannot be cleaned. Therefore, a technical personnel in this field provides a pressure measuring tube device for an earth-rock dam with a built-in silt removal function to solve the problems raised in the above background technology. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a piezometer device for an earth-rock dam with a built-in silt removal function, which solves the problem that fine soil particles in the dam body can still pass through the filter material under the action of seepage and stick to the surface of the geotextile during use, affecting the hydraulic connectivity. Some fine soil particles even enter the piezometer and cause siltation in the tube, thereby causing the sensitivity of the water level sensor placed in the piezometer to decrease year by year, affecting the accurate collection of data, and even losing the pressure measurement effect, posing a huge hidden danger to the project safety. The commonly used piezometers for earth-rock dams do not have the silt removal function. The silt removal in the piezometer is usually carried out by flushing with a high-pressure water pump, scooping out in the spiral drill pipe, and clearing with a pipeline dredging machine. The cleaning is time-consuming, labor-intensive, and costly, and the silt removal effect is not ideal. The fine soil particles inside the filter material and on the surface of the geotextile cannot be cleaned.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pressure measuring tube device for an earth-rock dam with a self-desilting function, comprising a pressure measuring tube body, a magnetic stirring structure is provided at the lower end of the pressure measuring tube body, a desilting structure is provided at the upper end of the pressure measuring tube body, the magnetic stirring structure comprises a servo motor, a first baffle is provided inside the pressure measuring tube body at the upper end of the servo motor, a first sealed bearing is fixedly connected to the lower end surface of the first baffle, the upper end of the first sealed bearing passes through the lower end surface of the first baffle and reaches the upper end surface of the first baffle, the output end of the servo motor passes through the inner ring of the first sealed bearing and reaches the upper end of the first baffle, A magnet rotating device is fixedly connected to the end, and the magnet rotating device is fixedly connected to the inner ring of the first sealed bearing. A second partition is provided inside the pressure measuring tube body at the upper end of the magnet rotating device, and a third groove is provided at the center of the upper end surface of the second partition, and a first groove is provided at the upper part of the third groove. A second sealed bearing is provided inside the first groove, and a copper disk rotor is provided inside the third groove. A second groove is provided at the upper part of the outer wall of the copper disk rotor, and the inner wall of the second groove is fixedly connected to the inner ring of the second sealed bearing. A plurality of spoiler ribs are arranged in a circular shape on the upper end surface of the copper disk rotor.

[0008] Preferably, a plurality of spheres are arranged in a circular shape on the lower end surface of the copper disc rotor, and the plurality of spheres are rotatably connected to the lower end surface of the copper disc rotor and are all attached to the lower inner wall of the third groove. The copper disc rotor is supported by the plurality of spheres to reduce friction and increase the service life of the equipment.

[0009] Preferably, the dredging structure includes a first connecting pipe, a filtering structure, a water pump, a three-way valve, an air compressor and a second connecting pipe, the first connecting pipe and the second connecting pipe are respectively arranged at the front of the inner part of the pressure measuring tube body, the upper ends of the first connecting pipe and the second connecting pipe both penetrate the pressure measuring tube body and reach the upper end of the pressure measuring tube body, the filtering structure is arranged on the output end of the first connecting pipe, the water pump is arranged on the output end of the filtering structure, the three-way valve is arranged on the output end of the water pump, the air compressor is arranged on the other input end of the three-way valve, the output end of the three-way valve is connected to the second connecting pipe, and by starting the water pump The pump draws out the air inside the filter structure to generate negative pressure inside the filter structure, and draws out the sewage and debris particles inside the pressure measuring tube body through the first connecting pipe. After filtering through the filter structure, the filtered water enters the three-way valve through the pump, and then enters the second connecting pipe through the three-way valve, and enters the pressure measuring tube body through the second connecting pipe. When internal dredging cannot completely solve the problem of silt blockage in the filter material area, high-pressure gas can be delivered to the second connecting pipe through an air compressor, and the silt accumulated in the filter material can be flushed out from the outer wall of the pressure measuring tube body by the impact force of the airflow, thereby further ensuring the effective permeability of the pressure measuring tube.

[0010] Preferably, the filtering structure includes an outer shell, a frame is provided inside the outer shell, a filter net is provided at the front of the inner part of the frame, a baffle is provided at the rear of the lower inner wall of the frame, and a joint is fixedly connected at the center of the front end surface of the outer shell. The sewage entering the frame is filtered by the filter net, and the filtered residue falls to the bottom of the frame and is blocked by the baffle for easy collection.

[0011] Preferably, a top plate is provided on the upper end surface of the filtering structure, and limit blocks are provided on the upper end surfaces of the outer shells on both sides of the upper end of the top plate, and the lower end surfaces of the two limit blocks are respectively attached to the upper end surface of the top plate on both sides. The two limit blocks are used to limit the top plate, which is convenient for installation and disassembly.

[0012] (III) Beneficial effects

[0013] The present invention provides a pressure measuring tube device for an earth-rock dam with a self-contained silt removal function. It has the following beneficial effects:

[0014] 1. In the present invention, a magnetic stirring structure is installed at the bottom of the pressure measuring tube body, and shares the same power supply with the pressure measuring tube water level automatic monitoring facility. The servo motor drives the magnet rotating device on the driving shaft to rotate. When the driving shaft magnet rotates, an electric current is induced in the copper disk rotor, and the formed eddy current gathers into a magnetic pole on the copper disk. This magnetic pole interacts with the magnet on the driving shaft to transmit torque to rotate the copper disk rotor. After the spoiler ribs on the copper disk rotor rotate, the fine particles deposited at the bottom of the hole are fully mixed with the water in the tube to form muddy water. The muddy water is pumped into the filtering structure by a water pump. While the water in the pressure measuring tube body is being extracted, the clean water filtered by the filtering structure is continuously injected into the pressure measuring tube body. The water is repeatedly pumped until clean water is extracted, thereby completing the dredging work of the pressure measuring tube.

[0015] 2. In the present invention, the first sealed bearing, the second sealed bearing and the plurality of spheres are used for support, so that the friction force is reduced while rotating, thereby reducing the wear of the equipment and the maintenance cost.

[0016] 3. In the present invention, when internal silt removal cannot completely solve the problem of silt blockage in the filter material area, the three-way valve can be turned to start the air compressor to deliver high-pressure gas to the second connecting pipe, and the impact force of the airflow can be used to flush the silt accumulated in the filter material from the outer wall of the pressure measuring tube body, thereby further ensuring the effective permeability of the pressure measuring tube body.

[0017] 4. In the present invention, the sewage entering the frame is filtered through the filter net, and the filtered residue falls to the bottom of the frame and is blocked by the baffle plate for easy collection. The top plate is limited by two limit blocks for easy installation and disassembly, and the collected particulate impurities and sludge are centrally processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 It is a three-dimensional diagram of the magnetic stirring structure of the present invention;

[0021] Figure 4 It is a three-dimensional cross-sectional view of the magnetic stirring structure of the present invention;

[0022] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0023] Figure 6 It is a three-dimensional diagram of the dredging structure of the present invention;

[0024] Figure 7 It is a side sectional view of the filtering structure of the present invention.

[0025] Among them, 1. pressure measuring tube body; 2. magnetic stirring structure; 201. servo motor; 202. first sealed bearing; 203. first partition; 204. second partition; 205. second sealed bearing; 206. spoiler ribs; 207. copper disk rotor; 208. first groove; 209. magnet rotating device; 210. second groove; 211. third groove; 212. sphere; 3. dredging structure; 301. first connecting pipe; 302. filtering structure; 3021. outer shell; 3022. frame; 3023. baffle; 3024. filter screen; 3025. top plate; 3026. limit block; 3027. joint; 303. water pump; 304. three-way valve; 305. air compressor; 306. second connecting pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] like Figure 1-7As shown, an embodiment of the present invention provides a piezometer device for an earth-rock dam with a self-contained silt removal function, comprising a piezometer body 1, a magnetic stirring structure 2 being provided at the lower end of the piezometer body 1, a silt removal structure 3 being provided at the upper end of the piezometer body 1, the magnetic stirring structure 2 comprising a servo motor 201, a first baffle 203 being provided inside the piezometer body 1 at the upper end of the servo motor 201, a first sealed bearing 202 being fixedly connected to the lower end surface of the first baffle 203, an upper end of the first sealed bearing 202 passing through the lower end surface of the first baffle 203 to the upper end surface of the first baffle 203, an output end of the servo motor 201 passing through the inner ring of the first sealed bearing 202 to the upper end of the first baffle 203, and a magnet rotating device 209 being fixedly connected to the end thereof, the magnet rotating device 209 being fixedly connected to the inner ring of the first sealed bearing 202, the magnet rotating device 209 being supported by the first sealed bearing 202, thereby improving stability while reducing friction.

[0029] A second partition plate 204 is provided inside the pressure measuring tube body 1 at the upper end of the magnet rotating device 209, a third groove 211 is provided at the center of the upper end surface of the second partition plate 204, a first groove 208 is provided at the upper part of the third groove 211, a second sealed bearing 205 is provided inside the first groove 208, a copper disk rotor 207 is provided inside the third groove 211, a second groove 210 is provided at the upper part of the outer wall of the copper disk rotor 207, the inner wall of the second groove 210 is fixedly connected to the inner ring of the second sealed bearing 205, a plurality of spoiler ribs 206 are arranged in a circular shape on the upper end surface of the copper disk rotor 207, and the copper disk rotor 207 is supported by the first sealed bearing 202, the second sealed bearing 205 and a plurality of spheres 212, so as to reduce friction during rotation, thereby reducing equipment wear and reducing maintenance costs.

[0030] A plurality of spheres 212 are arranged in a circular shape on the lower end surface of the copper disc rotor 207. The plurality of spheres 212 are rotatably connected to the lower end surface of the copper disc rotor 207 and are all fitted on the lower inner wall of the third groove 211. The copper disc rotor 207 is supported by the plurality of spheres 212 to reduce friction and increase the service life of the equipment.

[0031] The dredging structure 3 includes a first connecting pipe 301, a filtering structure 302, a water pump 303, a three-way valve 304, an air compressor 305 and a second connecting pipe 306. The first connecting pipe 301 and the second connecting pipe 306 are respectively arranged at the front of the pressure measuring tube body 1. The upper ends of the first connecting pipe 301 and the second connecting pipe 306 penetrate the pressure measuring tube body 1 and are connected to the upper end of the pressure measuring tube body 1. The filtering structure 302 is arranged on the output end of the first connecting pipe 301, the water pump 303 is arranged on the output end of the filtering structure 302, the three-way valve 304 is arranged on the output end of the water pump 303, and the air compressor 305 is arranged on the other input end of the three-way valve 304. The output end of the three-way valve 304 is connected to the second connecting pipe 306. By starting the pump The water pump 303 draws out the air inside the filter structure 302, so that negative pressure is generated inside the filter structure 302, and the sewage and debris particles inside the pressure measuring tube body 1 are drawn out through the first connecting pipe 301. After filtering through the filter structure 302, the filtered water enters the three-way valve 304 through the water pump 303, and then enters the second connecting pipe 306 through the three-way valve 304, and enters the pressure measuring tube body 1 through the second connecting pipe 306. When internal dredging cannot completely solve the problem of silt blockage in the filter material area, high-pressure gas can be delivered to the second connecting pipe 306 through the air compressor 305, and the silt accumulated in the filter material can be flushed out from the outer wall of the pressure measuring tube body 1 by the impact force of the airflow, thereby further ensuring the effective permeability of the pressure measuring tube.

[0032] The filtering structure 302 includes an outer shell 3021, a frame 3022 is provided inside the outer shell 3021, a filter screen 3024 is provided at the front of the inner part of the frame 3022, a baffle 3023 is provided at the rear of the lower inner wall of the frame 3022, and a joint 3027 is fixedly connected at the center of the front end surface of the outer shell 3021. The sewage entering the frame 3022 is filtered by the filter screen 3024, and the filtered residue falls to the bottom of the frame 3022 and is blocked by the baffle 3023 for easy collection.

[0033] A top plate 3025 is provided on the upper end surface of the filtering structure 302, and limit blocks 3026 are provided on the upper end surfaces of the outer shell 3021 on both sides of the upper end of the top plate 3025. The lower end surfaces of the two limit blocks 3026 are respectively attached to the upper end surfaces of the top plate 3025 on both sides. The two limit blocks 3026 are used to limit the top plate 3025 for easy installation and disassembly.

[0034] Working principle: A magnetic stirring structure 2 is installed at the bottom of the pressure measuring tube body 1, and shares the same power supply with the pressure measuring tube water level automatic monitoring facility. The servo motor 201 drives the magnet rotating device 209 on the driving shaft to rotate. When the magnet of the driving shaft rotates, it will induce current in the copper disc rotor 207. The eddy current formed gathers into magnetic poles on the copper disc. This magnetic pole interacts with the magnet on the driving shaft to transmit torque to rotate the copper disc rotor 207. The spoiler ribs 206 on the copper disc rotor 207 will be deposited on the bottom of the hole after rotation. The deposited fine particles are fully mixed with the water in the pipe to form muddy water, which is pumped into the filter structure 302 by the water pump 303. While the water in the pressure measuring tube body 1 is extracted, the clean water filtered by the filter structure 302 is continuously injected into the pressure measuring tube body 1. The water is pumped repeatedly until clean water is extracted, and the dredging work of the pressure measuring tube is completed. The first sealed bearing 202, the second sealed bearing 205 and the multiple balls 212 are used for support, which reduces friction while rotating, thereby reducing equipment wear and reducing maintenance costs.

[0035] When internal dredging cannot completely solve the problem of silt blockage in the filter material area, the three-way valve 304 can be turned to start the air compressor 305 to deliver high-pressure gas to the second connecting pipe 306, and the silt accumulated in the filter material can be washed out from the outer wall of the pressure measuring tube body 1 by the impact force of the airflow, so as to further ensure the effective permeability of the pressure measuring tube body 1, and the sewage entering the frame 3022 is filtered through the filter net 3024, and the filtered residue falls to the bottom of the frame 3022 and is blocked by the baffle 3023 for easy collection. The top plate 3025 is limited by two limit blocks 3026, which is convenient for installation and disassembly, and the collected particulate impurities and sludge are centrally processed.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piezometer device for an earth-rock dam with a self-desilting function, comprising a piezometer body (1), characterized in that: The lower end of the pressure measuring tube body (1) is provided with a magnetic stirring structure (2), and the upper end of the pressure measuring tube body (1) is provided with a dredging structure (3). The magnetic stirring structure (2) includes a servo motor (201). A first baffle (203) is provided inside the pressure measuring tube body (1) at the upper end of the servo motor (201). The lower end surface of the first baffle (203) is fixedly connected with a first sealed bearing (202). The upper end of the first sealed bearing (202) passes through the lower end surface of the first baffle (203) and is connected to the upper end surface of the first baffle (203). The output end of the servo motor (201) passes through the inner ring of the first sealed bearing (202) and is connected to the upper end of the first baffle (203). The end of the servo motor (201) is fixedly connected with a magnet rotating device (209). The magnet rotating device (209) is connected to the first sealed bearing. The inner rings of the bearings (202) are fixedly connected, a second partition (204) is provided inside the pressure measuring tube body (1) at the upper end of the magnet rotating device (209), a third groove (211) is provided at the center of the upper end surface of the second partition (204), a first groove (208) is provided inside the third groove (211) at the upper part, a second sealed bearing (205) is provided inside the first groove (208), a copper disk rotor (207) is provided inside the third groove (211), a second groove (210) is provided at the upper part of the outer wall of the copper disk rotor (207), an inner wall of the second groove (210) is fixedly connected to the inner ring of the second sealed bearing (205), and a plurality of spoiler ribs (206) are arranged in a circular shape on the upper end surface of the copper disk rotor (207).

2. The piezometric tube device for earth-rock dam with self-desilting function according to claim 1, characterized in that: A plurality of spheres (212) are arranged in a circular pattern on the lower end surface of the copper disc rotor (207); the plurality of spheres (212) are rotatably connected to the lower end surface of the copper disc rotor (207) and are attached to the lower inner wall of the third groove (211).

3. The piezometric tube device for earth-rock dam with self-desilting function according to claim 1, characterized in that: The dredging structure (3) comprises a first connecting pipe (301), a filtering structure (302), a water pump (303), a three-way valve (304), an air compressor (305) and a second connecting pipe (306). The first connecting pipe (301) and the second connecting pipe (306) are respectively arranged at the front of the pressure measuring tube body (1). The upper ends of the first connecting pipe (301) and the second connecting pipe (306) pass through the pressure measuring tube body (1) and are connected to the upper end of the pressure measuring tube body (1). The filtering structure (302) is arranged on the output end of the first connecting pipe (301), the water pump (303) is arranged on the output end of the filtering structure (302), the three-way valve (304) is arranged on the output end of the water pump (303), and the air compressor (305) is arranged on the other input end of the three-way valve (304). The output end of the three-way valve (304) is connected to the second connecting pipe (306).

4. The piezometric tube device for earth-rock dam with self-desilting function according to claim 3, characterized in that: The filtering structure (302) comprises an outer shell (3021), a frame (3022) is provided inside the outer shell (3021), a filter screen (3024) is provided at the front of the frame (3022), a baffle (3023) is provided at the rear of the lower inner wall of the frame (3022), and a joint (3027) is fixedly connected at the center of the front end surface of the outer shell (3021).

5. The piezometric tube device for earth-rock dam with self-desilting function according to claim 4, characterized in that: The upper end surface of the filtering structure (302) is provided with a top plate (3025), and the upper end surfaces of the outer shells (3021) on both sides of the upper end of the top plate (3025) are provided with limit blocks (3026), and the lower end surfaces of the two limit blocks (3026) are respectively attached to the upper end surface of the top plate (3025) on both sides.

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