A pipeline quality detection device for water conservancy projects

Abstract

The present invention relates to the technical field of pipeline detection and processing, and in particular to a pipeline quality detection device for water conservancy projects. The pipeline quality detection device for water conservancy projects comprises a base, a height adjustment structure is arranged on the base, the height adjustment structure is drivingly connected with a support plate, a first sliding support plate and a second sliding support plate which can be slidably connected towards each other are arranged on the support plate, an external closed driving structure is arranged on the first sliding support plate and the second sliding support plate, the external closed driving structure comprises a first half-rotation gear and a second half-rotation gear which can be spliced ​​and driven to rotate, a flaw detection structure is arranged on the first half-rotation gear and the second half-rotation gear, the flaw detection structure comprises a detection device which can rotate around the pipeline and reciprocate along the pipeline axis at the same time, and effectively solves the problem that the traditional detection equipment in the prior art has a small detection surface, is prone to missed detection, affects the accuracy of the detection result, and has low detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection and processing, and in particular to a pipeline quality detection device for water conservancy projects. Background Art

[0002] When cracks appear on the surface of a pipeline installed in the field, if they are not discovered and repaired in time, it will cause leakage of the transported fluid in the pipeline. Since water conservancy pipelines in the field are usually already installed and used, traditional detection equipment cannot surround the pipeline and conduct all-round circumferential detection. Therefore, workers are usually required to use ultrasonic flaw detectors to scan and detect flaws on the circumferential surface of the pipeline.

[0003] The patent application number is CN202322063835.9, and the patent name is a penetration-type pipeline flaw detection device. The pipeline is placed in the guide frame through the entrance, and the application is fixed on the pipeline through the fixing structure on the arc plate; a pair of transmission gears drives the fan-shaped outer gear ring to rotate, and the fan-shaped outer gear ring drives the X-ray flaw detector to move along the circumference of the pipeline, thereby enabling the X-ray flaw detector to perform 360-degree all-round flaw detection on the pipeline, thereby improving the flaw detection effect of the X-ray flaw detector.

[0004] However, there are still some shortcomings: the X-ray flaw detector moves around the circumference of the pipeline once, and can only realize one-way coil range detection. The detection area is small, and the position of the X-ray flaw detector along the axial direction of the pipeline needs to be constantly adjusted, which is prone to missed detection, affecting the accuracy of the detection results and reducing the efficiency of the detection. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a pipeline quality detection device for water conservancy projects, which effectively solves the problem that traditional detection equipment in the prior art can only realize one-way coil range detection, the detection surface is small, and the position of the detection equipment along the axial direction of the pipeline needs to be continuously adjusted, which is prone to missed detection, affecting the accuracy of the detection results and reducing the detection efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A pipeline quality inspection device for water conservancy projects comprises a base, on which a height adjustment structure is arranged, the height adjustment structure is drivingly connected to a support plate, on which a first sliding support plate and a second sliding support plate which can be slidably connected towards each other are arranged, an external closed driving structure is arranged on the first sliding support plate and the second sliding support plate, the external closed driving structure comprises a first half-rotating gear and a second half-rotating gear which can be spliced ​​and driven to rotate, a flaw detection structure is arranged on the first half-rotating gear and the second half-rotating gear, and the flaw detection structure comprises a detection device which can rotate the pipeline in a circle and slide back and forth along the pipeline axis at the same time.

[0008] Furthermore, one end of the first sliding support plate and the second sliding support plate are respectively fixedly connected with the first sliding block and the second sliding block, one end of the support plate is rotatably connected with a bidirectional screw rod, both ends of the bidirectional screw rod are respectively threadedly connected with the first sliding support plate and the second sliding support plate, and the lower ends of the first sliding support plate and the second sliding support plate are respectively provided with limit blocks slidably connected with the inner wall of the support plate.

[0009] Furthermore, the external closed driving structure also includes a motor fixedly connected to the first sliding support plate, the output end of the motor is fixedly connected to a spur gear, and the spur gear can be rotated to mesh with the first half-rotation gear and the second half-rotation gear, the two ends of the first sliding support plate are respectively fixedly connected to the first limiting rod and the first fixed rod, the two ends of the second sliding support plate are respectively fixedly connected to the second limiting rod and the second fixed rod, the first limiting rod and the second limiting rod are respectively provided with an arc limiting groove, and the first half-rotation gear and the second half-rotation gear are respectively provided with an arc limiting rod that is slidably connected to the arc limiting groove on the first limiting rod and the second limiting rod.

[0010] Further, the flaw detection structure respectively includes an inner arc plate fixedly connected to the first half-rotating gear and the second half-rotating gear, one end of the inner arc plate is rotatably connected to a closed groove wheel, the closed groove wheel is coaxially fixedly connected to a first meshing gear, the first fixed rod and the second fixed rod are respectively fixedly connected to the first semi-fixed gear and the second semi-fixed gear that can be spliced, the first meshing gear can be rotated to mesh with the first semi-fixed gear and the second semi-fixed gear, a latch slidably connected to the inner arc plate is provided on the inner groove of the closed groove wheel, the latch is fixedly connected to an arc plate slidably connected to the inner arc plate, a reflecting plate is provided on the arc plate at the relative position of the second half-rotating gear, a turntable is rotatably connected to the arc plate at the relative position of the first half-rotating gear, the edge side of the turntable is fixedly connected to the second meshing gear, a connecting rod is fixedly connected to the inner arc plate at the relative position of the first half-rotating gear, a spur rack meshing with the second meshing gear is provided on the connecting rod, and a DR ray machine symmetrical with the reflecting plate about the center of the pipeline is provided at the non-center of the turntable.

[0011] Furthermore, the height adjustment structure includes a pair of first support rods and a second support rod which are arranged at both ends of the base and cross-rotatably connected in the middle part, the lower end of the first support rod is provided with a sliding pin block which is slidably connected to the inner wall of the base, the upper end of the first support rod is provided with a fixed pin block which is fixedly connected to the support plate, the lower end of the second support rod is provided with the fixed pin block which is fixedly connected to the base, the upper end of the second support rod is provided with the sliding pin block which is slidably connected to the inner wall of the support plate, a one-way screw rod which is rotatably connected to the base is provided between the first support rods, and shaft rods are respectively provided at the rotating shaft of the sliding pin block at the lower end of the first support rod, the shaft rods are respectively fixedly connected to the mounting cylinder, and the inner wall of the mounting cylinder is fixedly connected with a screw cylinder which is threadedly connected to the one-way screw rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention provides an external closed driving structure, a first half-rotating gear and a second half-rotating gear that can be assembled and separated, and the first half-rotating gear and the second half-rotating gear can rotate around the center of the pipeline. During the driving process, the distance between the first half-rotating gear and the second half-rotating gear and the pipeline is fixed. Therefore, for the detection equipment set on the first half-rotating gear and the second half-rotating gear, the detection distance is the same, the detection result is more accurate, and the problem that it is difficult to realize the detection of the circumferential surface of the pipeline relative to the pipeline that has been erected is effectively solved.

[0014] 2. By setting up a flaw detection structure, the DR ray machine is used to perform X-ray flaw detection on the pipeline. At the same time, since the DR ray machine is set on a turntable rotatably connected to the arc plate, when the turntable slides with the arc plate, the second meshing gear on the outer periphery of the turntable meshes with the spur rack, thereby driving the turntable to rotate. Since the DR ray machine is set at a non-center of the turntable, the DR ray machine can form a small-range overlapping arc-shaped detection surface when moving, and can achieve all-round flaw detection of the pipeline in conjunction with circular rotation, thereby improving accuracy, and the X-ray penetrability is strong, and the flaw detection effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a first axonometric view of the present invention;

[0016] Figure 2 is a second axonometric view of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the external closed driving structure of the present invention;

[0018] Figure 4 is a schematic structural diagram of a second sliding support plate of the present invention;

[0019] Figure 5 is a schematic structural diagram of the second half-turn gear of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the closed slot rod of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the inner arc plate of the present invention;

[0022] Figure 8 It is a schematic structural diagram of the spur gear and the first half-turn gear of the present invention;

[0023] Fig. 9 is a schematic structural diagram of the second meshing gear of the present invention;

[0024] Fig.10 It is a structural schematic diagram of the turntable of the present invention;

[0025] Fig.11 It is a first structural schematic diagram of the height adjustment structure of the present invention;

[0026] Fig.12 It is a second structural schematic diagram of the height adjustment structure of the present invention;

[0027] In the figure: 1, base, 2, universal wheel, 3, pipe, 4, support plate, 5, first sliding support plate, 6, second sliding support plate, 7, bidirectional screw, 8, first slider, 9, handle, 10, motor, 11, spur gear, 12, first half-rotation gear, 13, second half-rotation gear, 14, second half-fixed gear, 15, first half-fixed gear, 16, first limit rotating rod, 17, second limit rotating rod, 18, second fixed rod, 19, second slider, 20, reflector, 21, inner arc plate, 22, first gear The gear is 23, the socket is 24, the arc limit rod is 25, the arc limit groove is 26, the closed groove rod is 27, the arc plate is 28, the latch is 29, the connecting rod is 30, the spur rack is 31, the second meshing gear is 32, the turntable is 33, the DR ray machine is 34, the sliding pin block is 35, the second support rod is 36, the first support rod is 37, the fixed pin block is 38, the handle is 39, the one-way screw is 40, the installation cylinder is 41, the shaft rod is 42, the screw cylinder is 43, the first fixed rod is 44, the limit block is 45, the plug rod is DETAILED DESCRIPTION

[0028] like Figure 1-12 As shown, a pipeline quality inspection device for water conservancy projects includes a base 1, on which a height adjustment structure is arranged, and the height adjustment structure is drivingly connected to a support plate 4, on which a first sliding support plate 5 and a second sliding support plate 6 which can be slidably connected toward each other are arranged, and the first sliding support plate 5 and the second sliding support plate 6 are provided with an external closed driving structure, and the external closed driving structure includes a first half-rotation gear 12 and a second half-rotation gear 13 which can be spliced ​​and driven, and the first half-rotation gear 12 and the second half-rotation gear 13 are provided with a flaw detection structure, and the flaw detection structure includes a detection device which can rotate the pipeline 3 in a circle and slide back and forth along the axial direction of the pipeline 3 at the same time.

[0029] When the present invention is in use, a plurality of universal wheels 2 are provided at the lower end of the base 1, and the universal wheels 2 are used to facilitate the position movement of the device, and the first sliding support plate 5 and the second sliding support plate 6 are slid outward toward each other to control the operation of the height adjustment structure, and the first sliding support plate 5 and the second sliding support plate 6 are adjusted to the two ends of the pipeline 3, and the first sliding support plate 5 and the second sliding support plate 6 are controlled to slide inward toward each other again until the first half-turn gear 12 and the second half-turn gear 13 are fitted, and the external closed driving structure is controlled to work, and the first half-turn gear 12 and the second half-turn gear 13 are driven to rotate, and at the same time, the flaw detection structure works, and the detection equipment includes a DR ray machine 33, and the DR ray machine 33 rotates in a circle with the center of the pipeline 3 as the axis and at the same time reciprocates along the axial direction of the pipeline 3 to realize multi-directional detection of the pipeline 3.

[0030] One end of the first sliding support plate 5 and the second sliding support plate 6 are respectively fixedly connected with the first sliding block 8 and the second sliding block 19, one end of the support plate 4 is rotatably connected with the bidirectional screw rod 7, and the two ends of the bidirectional screw rod 7 are respectively threadedly connected with the first sliding block 8 and the second sliding block 19, and the lower ends of the first sliding support plate 5 and the second sliding support plate 6 are respectively provided with limit blocks 44 that are slidably connected to the inner wall of the support plate 4.

[0031] like Figure 1 and 3 As shown, a rotating handle 9 is provided at one end of the bidirectional screw rod 7, and the bidirectional screw rod 7 is driven to rotate by the rotating handle 9. During the rotation of the bidirectional screw rod 7, the first slider 8 and the second slider 19 are threadedly matched to realize the first slider 8 and the second slider 19 sliding toward each other. The first slider 8 and the second slider 19 respectively drive the first sliding support plate 5 and the second sliding support plate 6 to slide toward each other along the upper end surface of the support plate 4 under the action of the limit block 44, clamping the pipeline 3 between the first sliding support plate 5 and the second sliding support plate 6, and realizing the splicing of the first half-rotation gear 12 and the second half-rotation gear 13 at the same time.

[0032] The external closed driving structure also includes a motor 10 fixedly connected to the first sliding support plate 5, and the output end of the motor 10 is fixedly connected to a spur gear 11, and the spur gear 11 can be rotated to mesh with the first half-rotation gear 12 and the second half-rotation gear 13. The two ends of the first sliding support plate 5 are respectively fixedly connected to the first limit rotating rod 16 and the first fixed rod 43, and the two ends of the second sliding support plate 6 are respectively fixedly connected to the second limit rotating rod 17 and the second fixed rod 18. The first limit rotating rod 16 and the second limit rotating rod 17 are respectively provided with an arc limit groove 25, and the first half-rotation gear 12 and the second half-rotation gear 13 are respectively provided with an arc limit rod 24 that is slidably connected to the arc limit groove 25 on the first limit rotating rod 16 and the second limit rotating rod 17.

[0033] like Figure 3 and 4As shown in Figure 5, the motor 10 is working, and the output end of the motor 10 drives the spur gear 11 to rotate. Since the spur gear 11 is initially meshed with the first half-rotation gear 12, the spur gear 11 can drive the first half-rotation gear 12 to rotate. In addition, since the first half-rotation gear 12 and the second half-rotation gear 13 are spliced, and the arc-shaped limiting grooves 25 on the first limiting rotating rod 16 and the second limiting rotating rod 17 can be connected after splicing, the arc-shaped limiting rods 24 on the first half-rotation gear 12 and the second half-rotation gear 13 are connected and can both slide circumferentially in the spliced ​​arc-shaped limiting grooves 25, and then the arc-shaped limiting rods 24 are used to limit the sliding of the first half-rotation gear 12 and the second half-rotation gear 13, and since the second limiting rotating rod 17 is provided with a plug hole 23 at the docking surface with the first limiting rotating rod 16, and the first limiting rotating rod 16 is provided with a plug rod 45 corresponding to the plug hole 23, when the first half-rotation gear 12 and the second half-rotation gear 13 are engaged, the first half-rotation gear 12 and the second half-rotation gear 13 are engaged. After the half-turn gears 13 are connected and spliced, the insertion rod 45 is inserted into the insertion hole 23 to fix the relative position of the second limit rotating rod 17 and the first limit rotating rod 16. Therefore, the spur gear 11 can be rotated to mesh with the first half-turn gear 12 and the second half-turn gear 13 to realize the common driving of the first half-turn gear 12 and the second half-turn gear 13 after splicing. The first half-turn gear 12 and the second half-turn gear 13 that can be spliced ​​and separated are provided, and the first half-turn gear 12 and the second half-turn gear 13 can rotate around the center of the pipeline 3, and the distance between the first half-turn gear 12 and the second half-turn gear 13 and the pipeline 3 during the driving process is fixed. Therefore, for the detection equipment arranged on the first half-turn gear 12 and the second half-turn gear 13, the detection distance is the same, and the detection result is more accurate, which effectively solves the problem that it is difficult to realize circumferential surface detection relative to the pipeline 3 that has been erected.

[0034] The flaw detection structure includes an inner arc plate 21 fixedly connected to the first half-rotating gear 12 and the second half-rotating gear 13, one end of the inner arc plate 21 is rotatably connected to a closed slot rod 26, and the closed slot rod 26 is coaxially fixedly connected to the first meshing gear 22. The first fixed rod 43 and the second fixed rod 18 are respectively fixedly connected to the first semi-fixed gear 15 and the second semi-fixed gear 14 that can be spliced. The first meshing gear 22 can be rotated to mesh with the first semi-fixed gear 15 and the second semi-fixed gear 14. The inner groove of the closed slot rod 26 is provided with a latch 28 that is slidably connected to the inner arc plate 21. The latch 28 is fixedly connected to the first semi-fixed gear 15 and the second semi-fixed gear 14. An arc plate 27 is fixedly connected to the inner arc plate 21 for sliding connection, a reflecting plate 20 is arranged on the arc plate 27 at a relative position of the second half-rotating gear 13, a turntable 32 is rotatably connected to the arc plate 27 at a relative position of the first half-rotating gear 12, a second meshing gear 31 is fixedly connected to the edge side of the turntable 32, a connecting rod 29 is fixedly connected to the inner arc plate 21 at a relative position of the first half-rotating gear 12, a spur rack 30 meshing with the second meshing gear 31 is arranged on the connecting rod 29, and a DR ray machine 33 symmetrical with the reflecting plate 20 about the center of the pipeline 3 is arranged at a non-center of the turntable 32.

[0035] like Figure 6-10As shown, when the first half-rotating gear 12 and the second half-rotating gear 13 are driven to rotate together, they respectively drive the inner arc plate 21 at the opposite surface position to rotate in a circle, the inner arc plate 21 drives the closed slot rod 26 to rotate in a circle, and the closed slot rod 26 drives the first meshing gear 22 at one end to rotate in a circle with the center of the pipeline 3 as the axis. Since the first semi-fixed gear 15 and the second semi-fixed gear 14 are fixedly arranged on the first fixed rod 43 and the second fixed rod 18, and the two can also be spliced, since the positions of the first semi-fixed gear 15 and the second semi-fixed gear 14 are fixed, the first meshing gear 22 rotates in a circle with the first semi-fixed gear 15 and the second semi-fixed gear 14. The closed slot rod 26 is meshed alternately to rotate in a circle while rotating on its own. The closed slot rod 26 drives the latch 28 to slide along the inner wall of the inner arc plate 21 during the rotation. Since a cyclic closed slide groove is provided on the closed slot rod 26, when the latch 28 moves to one end of the closed slot rod 26, it will enter another reverse slide groove, and the latch 28 can slide horizontally back and forth along the axial direction of the closed slot rod 26 without adjusting the direction of the motor 10. The latch 28 drives the arc-adhering plate 27 to slide along the surface of the inner arc plate 21, and the inner arc plates 21 on both sides of the pipe 3 are always in the central symmetrical position of the pipe 3, and the movement of the arc-adhering plates 27 on both sides is In the state, the DR ray machine 33 always maintains a symmetrical position with respect to the center of the pipeline 3. Since the DR ray machine 33 and the reflector 20 are symmetrically arranged on the arc-adhering plate 27, respectively, the relative positions of the two remain unchanged. The pipeline 3 is subjected to X-ray flaw detection by the DR ray machine 33. At the same time, since the DR ray machine 33 is arranged on a turntable 32 rotatably connected to the arc-adhering plate 27, when the turntable 32 slides with the arc-adhering plate 27, the second meshing gear 31 on the outer periphery of the turntable 32 meshes with the spur rack 30, thereby driving the turntable 32 to rotate. Since the DR ray machine 33 is arranged at a non-center of the turntable 32, the DR ray machine 33 can be formed when moving. A small-range overlapping arc detection surface is formed, which can realize all-round flaw detection of the pipeline 3 in conjunction with circular rotation, and the area of ​​the reflector 20 is larger than the range of the arc detection surface. Since the X-ray penetrability is strong and the flaw detection effect is good, the reflector 20 set on the opposite side of the DR ray machine 33 is not a reflector 20 in the traditional sense. It does not directly reflect X-rays, but manages and optimizes visible light or optical signals inside the detector. On the one hand, it is used to form total reflection of visible light in the crystal to reduce energy loss and improve the utilization rate of X-rays. On the other hand, it can block X-rays to prevent X-rays from causing harm to surrounding personnel.

[0036] The height adjustment structure includes a pair of first support rods 36 and second support rods 35 which are arranged at both ends of the base 1 and are cross-rotatably connected in the middle. The lower end of the first support rod 36 is provided with a sliding pin block 34 which is slidably connected to the inner wall of the base 1, the upper end of the first support rod 36 is provided with a fixed pin block 37 which is fixedly connected to the support plate 4, the lower end of the second support rod 35 is provided with the fixed pin block 37 which is fixedly connected to the base 1, the upper end of the second support rod 35 is provided with the sliding pin block 34 which is slidably connected to the inner wall of the support plate 4, a one-way screw rod 39 which is rotatably connected to the base 1 is provided between the first support rods 36, and shaft rods 41 are respectively provided at the rotating shafts of the sliding pin blocks 34 at the lower ends of the first support rods 36, and the shaft rods 41 are respectively fixedly connected to the mounting tube 40, and the inner wall of the mounting tube 40 is fixedly connected with a screw barrel 42 which is threadedly connected to the one-way screw rod 39.

[0037] like Fig.11 and 12 As shown, a handle 38 is provided at one end of the one-way screw rod 39, and the handle 38 is used to drive the one-way screw rod 39 to rotate. During the rotation of the one-way screw rod 39, it cooperates with the screw barrel 42 in the installation barrel 40 through the thread, thereby driving the installation barrel 40 to move axially along the one-way screw rod 39, and the installation barrel 40 drives the sliding pin block 34 at the lower end of the first support rod 36 to slide along the inner wall of the base 1 through the shaft rods 41 at both ends. Since the first support rod 36 and the second support rod 35 are cross-rotated in the middle, when the first support rod 36 moves in the center along the inner wall of the base 1, the angle between the first support rod 36 and the second support rod 35 becomes smaller, and the first support rod 36 and the second support rod 35 are supported upward, thereby adjusting the height of the support plate 4, and the relative positions of the first sliding support plate 5 and the second sliding support plate 6 can be adjusted according to the installation position of the pipeline 3.

[0038] The working process of the present invention is as follows: the one-way screw rod 39 is driven to rotate by the handle 38. During the rotation of the one-way screw rod 39, the one-way screw rod 39 is threadedly matched with the screw barrel 42 in the installation barrel 40, thereby driving the installation barrel 40 to move axially along the one-way screw rod 39. The installation barrel 40 drives the sliding pin block 34 at the lower end of the first support rod 36 to slide along the inner wall of the base 1 through the shaft rods 41 at both ends. Since the first support rod 36 and the second support rod 35 are cross-rotated in the middle, when the first support rod 36 moves centrally along the inner wall of the base 1, the angle between the first support rod 36 and the second support rod 35 becomes smaller, and the first support rod 36 and the second support rod 35 are propped up, thereby adjusting the height of the support plate 4, and the relative positions of the first sliding support plate 5 and the second sliding support plate 6 can be adjusted according to the installation position of the pipeline 3.

[0039] The bidirectional screw rod 7 is driven to rotate by the rotating handle 9. During the rotation of the bidirectional screw rod 7, the screw rod 7 cooperates with the first slider 8 and the second slider 19 through threads, thereby realizing the first slider 8 and the second slider 19 sliding toward each other. The first slider 8 and the second slider 19 respectively drive the first sliding support plate 5 and the second sliding support plate 6 to slide toward each other along the upper end surface of the support plate 4 under the action of the limit block 44, clamping the pipeline 3 between the first sliding support plate 5 and the second sliding support plate 6, and realizing the splicing of the first half-rotation gear 12 and the second half-rotation gear 13 at the same time. The motor 10 works, and the output end of the motor 10 drives the spur gear 11 to rotate. Since the spur gear 11 is initially meshed with the first half-rotation gear 12, the spur gear 11 can drive the first half-rotation gear 12 to rotate. In addition, since the first half-rotation gear 12 and the second half-rotation gear 13 are spliced, and the first limit rotating rod 16 and the second limit rotating rod 17 are on The arc limiting groove 25 can be docked after splicing, and the arc limiting rods 24 on the first half-rotation gear 12 and the second half-rotation gear 13 are docked and can both slide in a circle in the spliced ​​arc limiting groove 25, and then the arc limiting rod 24 is used to limit the sliding of the first half-rotation gear 12 and the second half-rotation gear 13, and since the second limit rotating rod 17 and the first limit rotating rod 16 are provided with a plug hole 23 at the docking surface, the first limit rotating rod 16 is provided with a plug rod 45 corresponding to the plug hole 23, so when the first half-rotation gear 12 and the second half-rotation gear 13 are docked and spliced, the plug rod 45 is inserted into the plug hole 23 to fix the relative position of the second limit rotating rod 17 and the first limit rotating rod 16, so the spur gear 11 can be rotated to mesh with the first half-rotation gear 12 and the second half-rotation gear 13, so as to realize the common driving of the first half-rotation gear 12 and the second half-rotation gear 13 after splicing.

[0040] When the first half-rotating gear 12 and the second half-rotating gear 13 are driven to rotate together, the inner arc plate 21 at the opposite surface position is driven to rotate in a circle, and the inner arc plate 21 drives the closed slot rod 26 to rotate in a circle, and the closed slot rod 26 drives the first meshing gear 22 at one end to rotate in a circle. Since the first semi-fixed gear 15 and the second semi-fixed gear 14 are fixedly arranged on the first fixed rod 43 and the second fixed rod 18, and the two can also be spliced, since the positions of the first semi-fixed gear 15 and the second semi-fixed gear 14 are fixed, the first meshing gear 22 is rotated with the first semi-fixed gear 15 and the second semi-fixed gear 14 during the process of circumferential rotation to realize the closed slot rod The closing slot rod 26 rotates in a circular motion while rotating on its own. The closing slot rod 26 drives the latch 28 to slide along the inner wall of the inner arc plate 21 during the rotation process. Since a circular closed slide groove is provided on the closing slot rod 26, when the latch 28 moves to one end of the closing slot rod 26, it will enter another reverse slide groove, and then the latch 28 can slide horizontally back and forth along the axial direction of the closing slot rod 26 without adjusting the direction of the motor 10. The latch 28 drives the arc-contacting plate 27 to slide along the surface of the inner arc plate 21, and the inner arc plates 21 on both sides of the pipe 3 are always in the central symmetrical position of the pipe 3, and the arc-contacting plates 27 on both sides always keep the pipe 3 in the moving state. The DR ray machine 33 and the reflector plate 20 are symmetrically arranged on the arc plate 27, so the relative position of the two remains unchanged. The DR ray machine 33 is used to perform X-ray flaw detection on the pipeline 3. At the same time, since the DR ray machine 33 is arranged on a turntable 32 rotatably connected to the arc plate 27, when the turntable 32 slides with the arc plate 27, the second meshing gear 31 on the outer periphery of the turntable 32 meshes with the spur rack 30, thereby driving the turntable 32 to rotate. Since the DR ray machine 33 is arranged at a non-center of the turntable 32, the DR ray machine 33 can form a small range of overlapping arcs when moving. The arc-shaped detection surface can realize all-round flaw detection on the pipeline 3 with the circular rotation, and the detection accuracy is improved. The area of ​​the reflector 20 is larger than the range of the arc-shaped detection surface. Since the X-ray penetrability is strong, the flaw detection effect is good. The reflector 20 set on the opposite side of the DR ray machine 33 is not a reflector 20 in the traditional sense. It does not directly reflect X-rays, but manages and optimizes visible light or optical signals inside the detector. On the one hand, it is used to form total reflection of visible light in the crystal to reduce energy loss and improve the utilization rate of X-rays. On the other hand, it can block X-rays to prevent X-rays from causing harm to surrounding personnel.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipeline quality inspection device for a water conservancy project, comprising a base (1), wherein the base (1) is provided with a height adjustment structure, wherein the height adjustment structure is drivingly connected to a support plate (4), wherein the support plate (4) is provided with a first sliding support plate (5) and a second sliding support plate (6) which can be slidably connected toward each other, wherein the first sliding support plate (5) and the second sliding support plate (6) are provided with an external closed driving structure, wherein the external closed driving structure comprises a first half-rotating gear (12) and a second half-rotating gear (13) which can be spliced ​​and driven to rotate, wherein the first half-rotating gear (12) and the second half-rotating gear (13) are provided with a flaw detection structure, wherein the flaw detection structure comprises a detection device which can rotate along the circumference of the pipeline (3) and simultaneously reciprocate along the axial direction of the pipeline (3), wherein the One end of the first sliding support plate (5) and the second sliding support plate (6) are respectively fixedly connected to a first sliding block (8) and a second sliding block (19); one end of the support plate (4) is rotatably connected to a bidirectional screw rod (7); the two ends of the bidirectional screw rod (7) are respectively threadedly connected to the first sliding block (8) and the second sliding block (19); the lower ends of the first sliding support plate (5) and the second sliding support plate (6) are respectively provided with a limit block (44) slidably connected to the inner wall of the support plate (4); the external closed driving structure further comprises a motor (10) fixedly connected to the first sliding support plate (5); the output end of the motor (10) is fixedly connected to a spur gear (11); the spur gear (11) can be rotated to mesh with the first half-rotation gear (12) and the second half-rotation gear (13); The two ends of the first sliding support plate (5) are respectively fixedly connected with a first limit rotating rod (16) and a first fixed rod (43), the two ends of the second sliding support plate (6) are respectively fixedly connected with a second limit rotating rod (17) and a second fixed rod (18), the first limit rotating rod (16) and the second limit rotating rod (17) are respectively provided with an arc limit groove (25), the first half-rotation gear (12) and the second half-rotation gear (13) are respectively provided with an arc limit rod (24) corresponding to the arc limit groove (25) on the first limit rotating rod (16) and the second limit rotating rod (17), the flaw detection structure comprises an inner arc plate (21) respectively fixedly connected with the first half-rotation gear (12) and the second half-rotation gear (13), the inner arc plate (21) 1) One end is rotatably connected to a closed slot rod (26), the closed slot rod (26) is coaxially fixedly connected to a first meshing gear (22), the first fixed rod (43) and the second fixed rod (18) are respectively fixedly connected to a first semi-fixed gear (15) and a second semi-fixed gear (14) that can be spliced, the first meshing gear (22) can be rotated to mesh with the first semi-fixed gear (15) and the second semi-fixed gear (14), the inner groove of the closed slot rod (26) is provided with a latch (28) slidably connected to an inner arc plate (21), the latch (28) is fixedly connected to an arc-contacting plate (27) slidably connected to the inner arc plate (21), and a reflector (20) is provided on the arc-contacting plate (27) at a position relative to the second semi-rotating gear (13),A rotating disk (32) is rotatably connected to the arc plate (27) at a position relative to the first half-rotating gear (12); a second meshing gear (31) is fixedly connected to the edge of the rotating disk (32); a connecting rod (29) is fixedly connected to the inner arc plate (21) at a position relative to the first half-rotating gear (12); a spur rack (30) meshing with the second meshing gear (31) is provided on the connecting rod (29); a DR ray machine (33) symmetrical with the reflecting plate (20) about the center of the pipeline (3) is provided at a non-center of the rotating disk (32); the height adjustment structure comprises a pair of first support rods (36) and second support rods (35) arranged at two ends of the base (1) and cross-rotatably connected in the middle; the lower end of the first support rod (36) is provided with a support rod that is aligned with the inner wall of the base (1). A sliding pin block (34) is slidably connected, the upper end of the first support rod (36) is provided with a fixed pin block (37) fixedly connected to the support plate (4), the lower end of the second support rod (35) is provided with the fixed pin block (37) fixedly connected to the base (1), the upper end of the second support rod (35) is provided with the sliding pin block (34) slidably connected to the inner wall of the support plate (4), a one-way screw rod (39) rotatably connected to the base (1) is provided between the first support rods (36), and shaft rods (41) are respectively provided at the rotating shafts of the sliding pin blocks (34) at the lower ends of the first support rods (36), and the shaft rods (41) are respectively fixedly connected to the mounting cylinder (40), and the inner wall of the mounting cylinder (40) is fixedly connected with a screw cylinder (42) threadedly connected to the one-way screw rod (39).

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