A water conservancy and hydropower engineering pipeline strength detection device

Abstract

The application relates to the technical field of pipeline strength detection, and particularly discloses a water conservancy and hydropower engineering pipeline strength detection device which comprises a rack and a detection unit arranged at the front end of the rack. The detection unit comprises a mounting seat, a detection piece which can move longitudinally relative to the mounting seat, an isolating piece which is movably arranged at the two ends of the detection piece and can move transversely relative to the mounting seat, and a linkage piece arranged between the detection piece and the isolating piece. The two sides of the isolating piece are axially separated through the radial feeding linkage driving of the detection piece. In the process that the detection piece approaches the pipeline, the action of scraping off the silt on the outer wall of the to-be-detected area of the underwater pipeline and forming a clean detection space is synchronously completed, the detection convenience and the detection efficiency are effectively improved, the silt on the outer wall of the to-be-detected area is effectively scraped off and isolated by the isolating piece, the outer pipe wall of the underwater pipeline is directly exposed, the detection piece can be directly contacted with the clean pipe wall surface for strength detection, and the accuracy and the reliability of the detection result are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline strength detection, more particularly, it relates to a water conservancy and hydropower engineering pipeline strength detection device. BACKGROUND

[0002] The underwater pipeline is a key facility of water conservancy and hydropower engineering, and its structural strength is directly related to water transportation safety and engineering life. The underwater pipeline is subjected to water flow impact, silt erosion and chemical corrosion for a long time, and is prone to pipe wall thinning, cracking or structural degradation. Regular strength detection is the key to ensuring operation safety.

[0003] However, the underwater environment is complex, and thick silt is generally attached to the outer wall of the pipeline. Although the existing detection device can be submerged close to the pipeline, the detection probe needs to directly contact the pipe wall. The silt layer on the surface of the pipeline not only hinders the effective adhesion of the probe to the pipe wall, but also absorbs or scatters ultrasonic energy, resulting in measurement data deviation and defect missed detection. Moreover, the turbulent water flow during detection causes repeated intrusion of turbid water, which easily forms a detection blind area and cannot maintain a stable detection environment. SUMMARY

[0004] In order to overcome the above technical problems, the present application provides a water conservancy and hydropower engineering pipeline strength detection device.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A water conservancy and hydropower engineering pipeline strength detection device is applied to the strength detection of an underwater pipeline, comprising a rack and a detection unit arranged at the front end of the rack.

[0007] The detection unit comprises:

[0008] A mounting seat fixed to the rack;

[0009] A first air cylinder mounted on the mounting seat;

[0010] A detection piece arranged at the output end of the first air cylinder and longitudinally movable relative to the mounting seat, for strength detection of the outer wall of the underwater pipeline;

[0011] An isolation piece movably arranged at both ends of the detection piece and transversely movable relative to the mounting seat, for isolating the detection area on the underwater pipeline to form a detection space accommodating the detection piece;

[0012] A linkage piece arranged between the detection piece and the isolation piece, for triggering the transverse movement of the two isolation pieces when the detection piece moves longitudinally.

[0013] As a further scheme of the present application, the detection member comprises a connecting frame fixed to the first cylinder output end, and a mounting head is arranged at the end of the connecting frame away from the first cylinder, and a plurality of detection probes are equidistantly arranged on the mounting head.

[0014] As a further scheme of the present application, a water storage cavity is arranged in the mounting head, a flow channel is arranged in the connecting frame and communicates with the water storage cavity, a plurality of front water spraying grooves are arranged on the side of the mounting head facing the underwater pipeline, and a plurality of back water spraying grooves are arranged on the side of the mounting head away from the underwater pipeline.

[0015] As a further scheme of the present application, a protection member adapted to the detection probe is further arranged on the mounting head, the protection member comprises a flap symmetrically and rotatably arranged on both sides of the detection probe, a flexible cover plate is arranged on each of the flaps, and magnetically attractable pieces adapted to each other are arranged on the flexible cover plates.

[0016] As a further scheme of the present application, the isolation member comprises isolation plates symmetrically arranged at both ends of the detection member, and a blade adapted to the outer wall of the underwater pipeline is arranged on the side of each of the isolation plates facing the underwater pipeline, and a flexible isolation film capable of being telescopically adjusted is arranged between the two groups of isolation plates.

[0017] As a further scheme of the present application, a winding box is arranged on one end of the isolation plate, a winding groove is arranged on the winding box, a winding drum (not shown in the figure) is rotatably arranged in the winding box, a winding spring is connected between the winding drum and the winding box, one end of the flexible isolation film is fixed to one of the isolation plates, and the other end of the flexible isolation film penetrates through the winding groove and is wound on the winding drum.

[0018] As a further scheme of the present application, the linkage member comprises L-shaped supports symmetrically arranged at both sides of the detection member, a longitudinal sliding groove and a transverse sliding groove are respectively arranged in each of the L-shaped supports, a longitudinal sliding plate is slidably arranged in the longitudinal sliding groove, the longitudinal sliding plate is fixedly connected with the detection member, a transverse sliding plate is slidably arranged in the transverse sliding groove, the transverse sliding plate is fixedly connected with the isolation plate on the same side, and a connecting rod is hingedly connected between the longitudinal sliding plate and the transverse sliding plate.

[0019] As a further scheme of the present application, a guide rail is fixedly arranged on the mounting seat, and the L-shaped supports are slidably arranged on the guide rail; a guide rod is arranged in the longitudinal sliding groove and movably penetrates through the longitudinal sliding plate, and a return spring is sleeved on the guide rod and abuts against the longitudinal sliding plate.

[0020] As a further scheme of the present application: further comprising a water supply unit arranged on the rack, the water supply unit comprising a water tank fixed on the rack, a partition plate is arranged in the water tank, the partition plate separates the water tank into a water storage compartment and a sealing compartment; a plurality of sliding strips are arranged on the inner wall of the water storage compartment in a circumferential direction, a piston plate is slidably installed on the sliding strips, a plurality of filter screens are arranged on the piston plate in a circumferential direction, and a sealing plate matched with the filter screens is rotatably installed at one end of the piston plate; a water pipe is arranged on one side of the water storage compartment and is communicated with the flow channel, a first one-way valve is arranged at the connection between the water pipe and the water storage compartment, and a second one-way valve is arranged on the side of the water storage compartment away from the first one-way valve.

[0021] As a further scheme of the present application: the side of the piston plate away from the sealing plate is provided with a waterproof cover, a switching motor for driving the sealing plate is installed in the waterproof cover, and a second air cylinder is installed in the sealing compartment, the extending end of the second air cylinder penetrates through the partition plate and is fixedly connected with the waterproof cover.

[0022] The beneficial effects of the present application are:

[0023] The present application effectively improves the detection convenience and efficiency by synchronously completing the actions of scraping off the silt on the outer wall of the to-be-detected area of the underwater pipeline and forming a clean detection space during the process of the detection member approaching the pipeline.

[0024] The isolation member effectively scrapes off and isolates the silt on the outer wall of the to-be-detected area, so that the outer wall of the underwater pipeline is directly exposed, ensuring that the detection member can directly contact the clean pipe wall surface for strength detection, effectively improving the accuracy and reliability of the detection result. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is a perspective view of the present application;

[0027] Figure 2 is a structural schematic view of the detection unit in the present application;

[0028] Figure 3 is a structural schematic view of the detection member in the present application;

[0029] Figure 4 is Figure 3 is an enlarged view of A in FIG.

[0030] Figure 5 is a structural schematic view of the mounting head and the protection member in the present application;

[0031] Figure 6 is a structural schematic view of the protection member in the present application;

[0032] Figure 7 Structure diagram of the isolating member and linkage member in the present application;

[0033] Figure 8 Structure diagram of the water supply unit in the present application;

[0034] Figure 9 Structure diagram of the water supply unit in the present application from another perspective;

[0035] Figure 10 Structure diagram of the water supply unit in the present application; Figure 9 Enlarged view of B in the above figure.

[0036] In the figure:

[0037] 100, frame;

[0038] 200, detection unit; 210, mounting seat; 220, first air cylinder; 230, detection member; 231, connecting frame; 232, mounting head; 233, detection probe; 234, water storage cavity; 235, flow channel; 236, front water spraying groove; 237, back water spraying groove; 238, protection member; 2381, flap; 2382, flexible cover plate; 2383, magnetic attraction piece; 240, isolating member; 241, isolating plate; 242, blade edge; 243, winding box; 244, winding groove; 245, flexible isolating film; 250, linkage member; 251, L-shaped support; 252, longitudinal sliding groove; 253, transverse sliding groove; 254, longitudinal sliding plate; 255, transverse sliding plate; 256, connecting rod; 257, return spring; 258, guide rail;

[0039] 300, water supply unit; 310, water tank; 311, partition plate; 312, water storage compartment; 313, sealing compartment; 314, sliding bar; 320, piston plate; 321, filter screen; 330, sealing plate; 340, second air cylinder; 350, switching motor; 360, waterproof cover; 370, first one-way valve; 380, second one-way valve; 390, water pipe;

[0040] 400, underwater pipeline. DETAILED DESCRIPTION

[0041] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0042] Please refer to Figure 1The application discloses a kind of water conservancy and hydropower engineering pipeline strength detection devices, applied to the strength detection of underwater pipeline 400, including rack 100 and detection unit 200;

[0043] Please refer to Figure 2 The detection unit 200 is arranged at the front end of the rack 100, including a mounting seat 210, a first cylinder 220, a detection piece 230, a separation piece 240 and a linkage 250, the mounting seat 210 is fixed on the rack 100, and the first cylinder 220 is installed on the mounting seat 210;The detection piece 230 is arranged at the output end of the first cylinder 220 and can move longitudinally relative to the mounting seat 210, for strength detection of the outer wall of the underwater pipeline 400;The separation piece 240 is movably arranged at both ends of the detection piece 230 and can move transversely relative to the mounting seat 210, for isolating the detection area on the underwater pipeline 400 to form a detection space accommodating the detection piece 230;The linkage 250 is arranged between the detection piece 230 and the separation piece 240, for triggering the transverse movement of the two separation pieces 240 when the detection piece 230 moves longitudinally;

[0044] Specifically, the rack 100 is submerged to the position of the underwater pipeline 400, so that the detection unit 200 faces the detection area to be detected on the underwater pipeline 400, and the detection piece 230 is driven to move longitudinally (i.e., to feed radially towards the underwater pipeline 400) by the first cylinder 220, in the process of the detection piece 230 radially approaching the underwater pipeline 400, the linkage 250 is triggered to drive the two separation pieces 240 to move transversely synchronously (i.e., the two groups of separation pieces 240 are axially away from each other along the underwater pipeline 400), so that the separation piece 240 scrapes the silt attached to the outer wall of the underwater pipeline 400 in the detection area to be detected along the axial direction towards both ends of the underwater pipeline 400, so that the outer wall of the underwater pipeline 400 is exposed, and at the same time, an isolated space accommodating the detection piece 230 is formed in the detection area to be detected of the underwater pipeline 400, until the detection piece 230 contacts the outer wall of the underwater pipeline 400, so that the detection piece 230 can be used to detect the strength of the specified area of the underwater pipeline 400.

[0045] It should be noted that the detection piece 230 is radially fed to drive the two separation pieces 240 to be axially separated, in the process of the detection piece 230 approaching the pipeline, the action of scraping the silt on the outer wall of the detection area to be detected of the underwater pipeline 400 and forming a clean detection space is completed synchronously, which effectively improves the detection convenience and detection efficiency.

[0046] The separation piece 240 effectively scrapes and isolates the silt on the outer wall of the detection area to be detected, so that the outer wall of the underwater pipeline 400 is directly exposed, which ensures that the detection piece 230 can directly contact the clean wall surface for strength detection, effectively improving the accuracy and reliability of the detection result.

[0047] In an embodiment, referring to Figure 2 , Figure 3 and Figure 4 , the detection member 230 comprises a connecting frame 231 fixed to the output end of the first cylinder 220, and a mounting head 232 is arranged at the end of the connecting frame 231 away from the first cylinder 220, and a plurality of detection probes 233 are equidistantly arranged on the mounting head 232;

[0048] Specifically, the connecting frame 231 and the mounting head 232 are driven by the first cylinder 220 to approach the underwater pipeline 400 until the detection probes 233 contact the outer wall of the underwater pipeline 400, so that the underwater pipeline 400 can be detected by the detection probes 233; the plurality of detection probes 233 equidistantly arranged on the mounting head 232 can cover multiple detection points on the outer wall of the underwater pipeline 400 at a time, so as to improve the detection efficiency and avoid positioning errors of point-by-point detection.

[0049] The detection probe 233 can use a piezoelectric ultrasonic probe (such as Olympus V111-SM series or equivalent models), and the detection probe 233 can realize strength detection by ultrasonic pulse echo method:

[0050] Emission stage: the detection probe 233 emits high-frequency ultrasonic pulses to the wall of the underwater pipeline 400;

[0051] Propagation and reflection: the sound wave propagates in the wall and produces reflected echoes when encountering internal defects (such as cracks, corrosion) or the bottom surface of the wall;

[0052] Signal receiving and analysis: the detection probe 233 receives the echo signal, calculates the wall thickness by analyzing the sound wave propagation time, judges the internal defects (such as pores, debonding) according to the echo amplitude / shape, and then comprehensively evaluates the structural strength;

[0053] Data output: the data of multiple probes are processed by integrated circuits to generate a wall thickness distribution map and a defect positioning report (such as C-scan imaging).

[0054] Further, considering that only the two-way scraping of the silt adhered to the outer wall of the underwater pipeline 400 by the isolation plate 241, there will inevitably be some stubborn silt still remaining on the outer wall of the underwater pipeline 400; in addition, the water flow disturbance caused by the movement of the isolation member 240 will also cause the water in the isolation space formed by the isolation plate 241 to be turbid, thereby affecting the strength detection of the underwater pipeline 400 by the detection probe 233, therefore, referring to Figure 3The mounting head 232 is provided with a water storage cavity 234, the connecting frame 231 is provided with a flow channel 235 communicating with the water storage cavity 234, the side of the mounting head 232 facing the underwater pipeline 400 is provided with a plurality of front water jet grooves 236, and the side of the mounting head 232 away from the underwater pipeline 400 is provided with a plurality of back water jet grooves 237.

[0055] Specifically, clean water is introduced into the water storage cavity 234 of the mounting head 232 through the flow channel 235, and then the clean water is sprayed out of the front water jet grooves 236 and the back water jet grooves 237. The clean water sprayed out of the front water jet grooves 236 can wash the outer pipe wall of the underwater pipeline 400 to remove residual silt and avoid interference of the residual silt with the detection process of the detection probe 233. The washed sewage is discharged from the gap between the isolation piece 240 and the underwater pipeline 400. The clean water sprayed out of the back water jet grooves 237 can wash the back side area in the isolation space, so as to promote the discharge of turbid water in the isolation space, improve the water quality clarity of the detection area, and improve the detection accuracy.

[0056] It should be noted that the front water jet grooves 236 are used to direct the spraying of clean water to directly flush the detection area of the outer pipe wall of the underwater pipeline 400, completely remove the stubborn silt remaining after the scraping of the isolation plate 241, avoid the interference of the silt with the contact between the detection probe 233 and the pipe wall, and ensure the authenticity of the detection data.

[0057] The back water jet grooves 237 are used to spray clean water to the back side of the isolation space to form a directional water flow, forcibly discharge the turbid water generated due to the movement of the isolation piece 240, improve the water quality transparency of the detection area, and ensure the propagation of the ultrasonic signal (detection probe 233) without being interfered by suspended particles.

[0058] Further, referring to Figure 4 , Figure 5 and Figure 6 , the mounting head 232 is further provided with a protection piece 238 matched with the detection probe 233. The protection piece 238 comprises flip plates 2381 symmetrically and rotatably installed on both sides of the detection probe 233. Flexible cover plates 2382 are arranged on both sides of the flip plates 2381, and magnetic attraction pieces 2383 matched with each other are arranged on both sides of the flexible cover plates 2382.

[0059] Specifically, in the initial state, the two magnetic attraction pieces 2383 are attracted to each other, so that the flexible cover plates 2382 and the flip plates 2381 on both sides enclose a closed space wrapping each detection probe 233. The detection probe 233 is wrapped and protected by the protection piece 238 to prevent silt from adhering to the surface of the detection probe 233 during the water flushing process.

[0060] Before the detection probe 233 contacts the outer wall of the underwater pipeline 400, the front water jetting groove 236 can be used to flush the outer wall of the underwater pipeline 400 during the process that the mounting head 232 and the detection probe 233 gradually approach the underwater pipeline 400. When the flap 2381 contacts the outer wall of the underwater pipeline 400, with the continuous feeding of the mounting head 232, the two flaps 2381 are forced to flip to the two sides respectively, the two magnetic attraction pieces 2383 are forced to separate, the protective piece 238 is forced to flip to the two sides to open, and the detection probe 233 is exposed. At this time, the front water jetting groove 236 has just flushed the outer wall of the underwater pipeline 400, and then the detection probe 233 contacts the outer wall of the underwater pipeline 400 which has been flushed, and the subsequent strength detection can be performed.

[0061] It should be noted that in the initial state and the flushing stage, the two flexible cover plates 2382 and the flap 2381 are enclosed to form a closed space by the magnetic attraction of the magnetic attraction piece 2383, so as to completely wrap the detection probe 233 and completely isolate the splashed silt during the water flow flushing, so as to avoid signal distortion or equipment damage caused by probe surface pollution.

[0062] The opening of the protective piece 238 is naturally triggered by the detection feeding action. When the flap 2381 contacts the outer wall of the underwater pipeline 400, with the continuous feeding of the mounting head 232, the pipeline reaction force forces the two flaps 2381 to flip outward, and the magnetic attraction of the magnetic attraction piece 2383 is automatically released. Moreover, the opening time of the protective piece 238 strictly matches the detection process. The flap 2381 contacts the outer wall to trigger the opening of the protective cover, and the detection probe 233 is exposed and contacts the outer wall to perform the strength detection immediately after the front water jetting groove 236 completes the flushing of the outer wall to make the outer wall clean, so as to realize the seamless connection of the three stages of protection, flushing and detection.

[0063] The flexible cover plate 2382 can be made of rubber or silicone material, which can be self-adapted to the curved surface of the mounting head 232 when closed, so as to ensure the sealing of the protective space. After being opened, the flap 2381 is folded and collected, and does not occupy the detection space.

[0064] In another embodiment, please refer to Figure 2 、 Figure 3 and Figure 7 The isolation piece 240 includes isolation plates 241 which are symmetrically distributed at two ends of the detection piece 230. The isolation plates 241 are provided with blades 242 which are adapted to the outer wall of the underwater pipeline 400 on the side facing the underwater pipeline 400. Flexible isolation membranes 245 which can be extended and adjusted are arranged between the two groups of isolation plates 241.

[0065] Specifically, in the initial state, the two sets of isolation plates 241 are in close contact with each other and do not interfere with the detection piece 230. As the first cylinder 220 drives the isolation plates 241 to feed radially towards the underwater pipeline 400, when the cutting edges 242 of the two sets of isolation plates 241 come into contact with the outer wall of the underwater pipeline 400, the isolation plates 241 cannot continue to feed radially. Under the triggering action of the linkage 250, the two sets of isolation plates 241 are forced to move axially away from each other along the underwater pipeline 400. The isolation plates 241 scrape off the silt adhering to the outer wall of the underwater pipeline 400 towards both ends, so as to expose the outer wall of the underwater pipeline 400. At the same time, the flexible isolation membranes 245 between the two sets of isolation plates 241 are also stretched adaptively, so as to form an isolation space enclosing the detection piece 230 by the two sets of isolation plates 241 and the two sets of flexible isolation membranes 245.

[0066] It should be noted that the flexible isolation membranes 245 are stretched adaptively when the two sets of isolation plates 241 are separated axially, and together with the isolation plates 241 form a four-sided closed isolation space, which blocks the intrusion of external silt and turbid water, and provides a stable clean detection environment for the detection probe 233.

[0067] The cutting edges 242 have positioning and scraping functions. When they come into contact with the outer wall of the underwater pipeline 400, they trigger the axial movement of the isolation plates 241, and at the same time scrape off the silt along the axial direction of the pipeline wall, improving the peeling efficiency of the silt and the pipeline wall.

[0068] Further, please refer to Figure 2 and Figure 7 One end of the isolation plate 241 is provided with a winding box 243, the winding box 243 is provided with a winding groove 244, and a winding drum (not shown in the figure) is rotatably installed in the winding box 243. A winding spring is connected between the winding drum and the winding box 243. One end of the flexible isolation membrane 245 is fixed to one set of isolation plates 241, and the other end of the flexible isolation membrane 245 penetrates through the winding groove 244 and is wound on the winding drum.

[0069] Specifically, when the two sets of isolation plates 241 move away from each other, the flexible isolation membrane 245 in the winding box 243 is pulled out at the same time, so as to enclose the isolation space and prevent external impurities from entering the isolation space. Due to the elastic force of the winding spring, the winding drum can always elastically wind the flexible isolation membrane 245, so as to ensure that the flexible isolation membrane 245 is in a tight state, and also realizes automatic winding of the flexible isolation membrane 245.

[0070] It should be noted that the winding drum driven by the winding spring continuously elastically winds the flexible isolation membrane 245, so as to ensure that the flexible isolation membrane 245 is in a tight state in real time when the isolation plates 241 are separated axially, avoiding wrinkles or relaxation caused by water flow impact, and ensuring the sealing reliability of the isolation space.

[0071] When the isolation plates 241 are reset, the elastic restoring force of the coil spring automatically retracts the flexible isolation film 245 into the winding drum, eliminating the risk of film entanglement or exposure damage, and improving the reuse efficiency of the device;

[0072] The winding box 243 is directly integrated into the side end of the isolation plate 241, and the winding groove 244 precisely guides the movement path of the flexible isolation film 245. The entire mechanism is embedded without exposed components, avoiding the hooking of underwater debris and ensuring long-term operation stability.

[0073] Further, please refer to Figure 2 and Figure 7 , the linkage 250 includes L-shaped supports 251 symmetrically distributed on both sides of the detection member 230, and longitudinal sliding grooves 252 and transverse sliding grooves 253 are respectively formed on the L-shaped supports 251. A longitudinal sliding plate 254 is slidably embedded in the longitudinal sliding groove 252, and the longitudinal sliding plate 254 is fixedly connected with the detection member 230. A transverse sliding plate 255 is slidably embedded in the transverse sliding groove 253, and the transverse sliding plate 255 is fixedly connected with the same side isolation plate 241. A connecting rod 256 is hingedly connected between the longitudinal sliding plate 254 and the transverse sliding plate 255.

[0074] Specifically, in the initial state, the longitudinal sliding plate 254 is located at one end of the longitudinal sliding groove 252 close to the first cylinder 220, at which time the two sets of isolation plates 241 are in close contact with each other, and the detection member 230 is retracted into the space between the two sets of L-shaped supports 251. When the first cylinder 220 drives the detection member 230 to approach the underwater pipeline 400 radially, it simultaneously drives the two L-shaped supports 251 and the isolation plates 241 to feed radially until the two sets of isolation plates 241 contact the outer pipe wall of the underwater pipeline 400. At this time, the isolation plates 241 cannot continue to feed radially, but the detection member 230 can continue to feed radially, thereby driving the longitudinal sliding plate 254 to slide longitudinally along the L-shaped support 251. Under the transmission of the connecting rod 256, the corresponding transverse sliding plate 255 is simultaneously driven to slide transversely along the transverse sliding groove 253, thereby causing the two sets of isolation plates 241 to simultaneously move axially away from each other, thereby scraping the sludge on the outer pipe wall of the underwater pipeline 400 and forming an isolation space. At the same time, the detection member 230 continues to feed radially into the isolation space until the detection member 230 contacts the outer pipe wall of the underwater pipeline 400 for strength detection.

[0075] It should be noted that the longitudinal sliding plate 254 and the transverse sliding plate 255 are hingedly connected by the connecting rod 256, which converts the longitudinal feeding motion (radial) of the detection member 230 into the transverse separation motion (axial) of the isolation plates 241, thereby realizing the linkage of detection feeding, sludge scraping, and isolation space formation, and ensuring accurate timing matching of actions;

[0076] When the blade edge 242 of the isolation plate 241 contacts the wall of the underwater pipeline 400 (radial obstruction), the longitudinal sliding plate 254 continuously moves, and through the sliding groove constraint of the L-shaped support 251 and the angle change of the connecting rod 256, the transverse sliding plate 255 is automatically triggered to drive the axial separation of the isolation plate 241.

[0077] The L-shaped support 251 is integrated with the longitudinal sliding groove 252 and the transverse sliding groove 253, the longitudinal sliding plate 254 and the transverse sliding plate 255 are respectively embedded in the corresponding groove bodies, and the motion direction conversion is completed through the single connecting rod 256, so as to avoid the motion interference of the underwater environment.

[0078] In addition, the mounting seat 210 is fixed with a guide rail 258, the L-shaped support 251 is slidingly embedded on the guide rail 258, the longitudinal sliding groove 252 is provided with a guide rod penetrating the longitudinal sliding plate 254, and the guide rod is sleeved with a reset spring 257 abutting against the longitudinal sliding plate 254.

[0079] Specifically, the radial guidance of the L-shaped support 251 by the guide rail 258 can ensure the stability of the overall motion of the L-shaped support 251; in the initial state, due to the elastic force of the reset spring 257, the longitudinal sliding plate 254 can be always located at one end of the longitudinal sliding groove 252 close to the first air cylinder 220; and in the reset stage, the reset spring 257 can also automatically slide the longitudinal sliding plate 254 along the longitudinal sliding groove 252 to reset, so as to synchronously drive the two groups of isolation plates 241 to approach each other during the retraction and reset of the detection piece 230.

[0080] It should be noted that the rigid radial guidance of the L-shaped support 251 by the guide rail 258 eliminates the lateral deviation caused by the flow impact or mechanical load, ensures the vertical and accurate contact of the blade edge 242 of the isolation plate 241 with the outer wall of the underwater pipeline 400, and guarantees the reliability of the mud scraping action.

[0081] The reset spring 257 pushes the longitudinal sliding plate 254 to the initial position through the pre-tightening elastic force, drives the longitudinal sliding plate 254 to automatically reset when the detection piece 230 retracts, and transmits the force through the connecting rod 256 to synchronously pull back the isolation plate 241 to close.

[0082] In further embodiments, please refer to Figure 1 , Figure 8 and Figure 9Further comprising a water supply unit 300 arranged on the rack 100, the water supply unit 300 comprising a water tank 310 fixed on the rack 100, a partition plate 311 arranged in the water tank 310, the partition plate 311 separating the water tank 310 into a water storage compartment 312 and a sealed compartment 313; a plurality of sliding strips 314 are circumferentially arranged on the inner wall of the water storage compartment 312, a piston plate 320 is slidingly installed on the sliding strips 314, a plurality of filter screens 321 are circumferentially arranged on the piston plate 320, and a sealing plate 330 adapted to the filter screens 321 is rotationally installed at one end of the piston plate 320; one side of the water storage compartment 312 is communicated with the flow channel 235 through a water pipe 390, a first one-way valve 370 is installed at the connection between the water pipe 390 and the water storage compartment 312, and a second one-way valve 380 is installed on the side of the water storage compartment 312 away from the first one-way valve 370;

[0083] Specifically, the water tank 310 can directly extract the surrounding water body as the flushing water source of the detection piece 230, when the water storage compartment 312 is full of water, the sealing plate 330 is first rotated to be completely offset from each filter screen 321, and then the piston plate 320 is slid along the sliding strip 314 to the side away from the first one-way valve 370, at this time, the first one-way valve 370 and the second one-way valve 380 are both reversely blocked, the water body in the right chamber of the piston plate 320 is transferred to the left chamber of the piston plate 320 through the filter screen 321, and the impurities in the water body are intercepted by the filter screen 321, so that the water body entering the left chamber is kept clean after being filtered and purified.

[0084] Then the sealing plate 330 is rotated to switch to completely block each filter screen 321, and then the piston plate 320 is slid along the sliding strip 314 to the side of the first one-way valve 370, at this time, the first one-way valve 370 and the second one-way valve 380 are both normally conducted, that is, the water body in the left chamber can be squeezed into the water pipe 390 through the first one-way valve 370 by the piston plate 320, and then the purified water body enters the flow channel 235 and the water storage cavity 234; at the same time, a negative pressure is generated in the right chamber, so that the external water body can be sucked into the right chamber through the second one-way valve 380, thereby realizing the synchronous extraction of the surrounding water body; in this way, the extraction, purification and extrusion cycle of the water body can be realized.

[0085] It should be noted that by directly extracting the surrounding water body, external water supply is not required, impurities are removed through interception by the filter screen 321, and clean flushing water is output to meet the flushing needs of the detection probe 233.

[0086] In the purification stage, the sealing plate 330 opens the filter screen 321, and the piston plate 320 moves to the right, so that the water body moves to the left through the filter screen 321, and the impurities are intercepted in the right chamber.

[0087] In the water suction stage, the filter screen 321 is blocked by the sealing plate 330, the piston plate 320 moves to the left, the second one-way valve 380 is open to the right chamber to suck water from the outside, and the first one-way valve 370 is open to squeeze the clean water in the left chamber to the water pipe 390.

[0088] Further, referring to Figure 9 and Figure 10 , the side of the piston plate 320 away from the sealing plate 330 is provided with a waterproof cover 360, the waterproof cover 360 is internally provided with a switching motor 350 for driving the sealing plate 330, the sealing chamber 313 is internally provided with a second air cylinder 340, the second air cylinder 340 extends through the partition plate 311 and is fixedly connected with the waterproof cover 360;

[0089] Specifically, the waterproof cover 360 isolates the water flow from eroding the switching motor 350, and the sealing chamber 313 provides a dry operating environment for the second air cylinder 340; the piston plate 320 is driven by the second air cylinder 340 to reciprocate in the water storage chamber 312 along the slide strip 314, so as to realize the purification and suction and extrusion of the water body; the sealing plate 330 is driven by the switching motor 350 to rotate circumferentially, so as to realize the state switching of the sealing plate 330, thereby blocking and opening the filter screen 321.

[0090] The specific embodiments of the present application are described above, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms under the inspiration of the present application, which all belong to the protection of the present application.

Claims

1. A strength testing device for water conservancy and hydropower engineering pipelines, used for strength testing of underwater pipelines (400), comprising a frame (100) and a testing unit (200) disposed at the front end of the frame (100). Its features are, The detection unit (200) includes: Mounting base (210), which is fixed to the frame (100); The first cylinder (220) is mounted on the mounting base (210); The test piece (230), which is located at the output end of the first cylinder (220) and can move longitudinally relative to the mounting base (210), is used to test the strength of the outer wall of the underwater pipe (400); The isolation element (240) is movably disposed at both ends of the detection element (230) and can move laterally relative to the mounting base (210) to isolate the detection area on the underwater pipeline (400) to form a detection space to accommodate the detection element (230); A linkage (250) is disposed between the detection element (230) and the isolation element (240) for triggering the lateral movement of the isolation elements (240) on both sides when the detection element (230) moves longitudinally; The isolation element (240) includes isolation plates (241) symmetrically distributed at both ends of the detection element (230). The isolation plate (241) has a cutting edge (242) adapted to the outer wall of the underwater pipe (400) on the side facing the underwater pipe (400). A flexible isolation membrane (245) that can be stretched and adjusted is provided between the two sets of isolation plates (241).

2. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 1, characterized in that, The detection component (230) includes a connecting frame (231) fixed to the output end of the first cylinder (220). A mounting head (232) is provided at the end of the connecting frame (231) away from the first cylinder (220). A plurality of detection probes (233) are equidistantly arranged on the mounting head (232).

3. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 2, characterized in that, The mounting head (232) has a water storage chamber (234) inside, and the connecting frame (231) has a flow channel (235) connecting the water storage chamber (234) inside. The mounting head (232) has several front spray grooves (236) on the side facing the underwater pipe (400), and several back spray grooves (237) on the side of the mounting head (232) away from the underwater pipe (400).

4. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 2, characterized in that, The mounting head (232) is also provided with a protective component (238) adapted to the detection probe (233). The protective component (238) includes a flap (2381) symmetrically rotated and installed on both sides of the detection probe (233). A flexible cover plate (2382) is provided on both sides of the flap (2381), and a magnetic suction plate (2383) adapted to each other is provided on both sides of the flexible cover plate (2382).

5. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 1, characterized in that, A winding box (243) is provided on one end of the isolation plate (241). A winding groove (244) is provided on the winding box (243). A winding drum (not shown in the figure) is rotatably installed inside the winding box (243). A coil spring is connected between the winding drum and the winding box (243). One end of the flexible isolation film (245) is fixed on a set of isolation plates (241), and the other end of the flexible isolation film (245) passes through the winding groove (244) and is wound on the winding drum.

6. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 1, characterized in that, The linkage component (250) includes L-shaped brackets (251) symmetrically distributed on both sides of the detection component (230). The L-shaped brackets (251) are respectively provided with a longitudinal slide groove (252) and a transverse slide groove (253). A longitudinal slide plate (254) is slidably embedded in the longitudinal slide groove (252). The longitudinal slide plate (254) is fixedly connected to the detection component (230). A transverse slide plate (255) is slidably embedded in the transverse slide groove (253). The transverse slide plate (255) is fixedly connected to the isolation plate (241) on the same side. A connecting rod (256) is hinged between the longitudinal slide plate (254) and the transverse slide plate (255).

7. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 6, characterized in that, The mounting base (210) is fixed with a guide rail (258), and the L-shaped bracket (251) is slidably embedded in the guide rail (258); a guide rod that moves through the longitudinal slide plate (254) is provided in the longitudinal slide groove (252), and a return spring (257) that abuts against the longitudinal slide plate (254) is sleeved on the guide rod.

8. The strength testing device for water conservancy and hydropower engineering pipelines according to claim 3, characterized in that, It also includes a water supply unit (300) mounted on a frame (100), the water supply unit (300) including a water tank (310) fixed on the frame (100), a partition (311) provided inside the water tank (310), the partition (311) dividing the water tank (310) into a water storage chamber (312) and a sealed chamber (313); a plurality of sliding strips (314) are arranged circumferentially on the inner wall of the water storage chamber (312), and a piston plate (320) is slidably mounted on the sliding strips (314). The piston plate (320) is circumferentially provided with a plurality of filter screens (321), and a sealing plate (330) adapted to the filter screens (321) is rotatably installed at one end of the piston plate (320); one side of the water storage tank (312) is connected to the flow channel (235) through a water pipe (390), and a first one-way valve (370) is installed at the connection between the water pipe (390) and the water storage tank (312), and a second one-way valve (380) is installed on the side of the water storage tank (312) away from the first one-way valve (370).

9. A strength testing device for water conservancy and hydropower engineering pipelines according to claim 8, characterized in that, A waterproof cover (360) is provided on the side of the piston plate (320) away from the sealing plate (330). A switching motor (350) for driving the sealing plate (330) is installed inside the waterproof cover (360). A second cylinder (340) is installed inside the sealing chamber (313). The protruding end of the second cylinder (340) passes through the partition plate (311) and is fixedly connected to the waterproof cover (360).

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