Portable multi-stream high-pressure heat exchanger pipeline welding seam detection device

Abstract

The invention provides a portable multi-stream high-pressure heat exchanger pipeline welding seam detection device. The portable multi-stream high-pressure heat exchanger pipeline welding seam detection device comprises a support assembly, a detection assembly, a driving assembly and an air supply system. The driving assembly is installed at the front end of the support assembly and is responsible for driving the detection rotating shaft to rotate. The detection assembly is composed of a main column body and an auxiliary column body, and an ultrasonic probe is arranged at the front end of the main column body and used for welding seam detection. The ultrasonic probe is embedded into the filling body, is connected into a detection data line through a probe line, and extends downwards to the outside of the equipment. The gas spring is arranged in the rear side of the filling body, provided with an inflation inlet and connected to an external gas source through an inflation pipe. The gas source device supplies gas into the detection rotating shaft to ensure that the ultrasonic probe is in close contact with the inner wall of the pipeline, so that the detection precision is improved. Through precise combination of a pneumatic structure and a mechanical structure, the device not only realizes miniaturization design and is convenient to operate in a narrow space, but also can meet high-frequency welding seam detection requirements, and is suitable for periodic detection and evaluation of high-voltage equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of special equipment weld detection, and in particular relates to a portable multi-stream high-pressure heat exchanger pipeline weld detection device. Background Art

[0002] Multi-stream high-pressure heat exchangers are a type of high-efficiency heat exchange equipment used in industrial production. They are usually used in environments with high temperature, high pressure and multiple fluid flows. This type of heat exchanger has the advantages of compact structure and high heat transfer efficiency, and is widely used in petrochemical, metallurgical, electric power and other industries. However, multi-stream high-pressure heat exchangers also have some unique structural characteristics and usage requirements, which pose a great challenge to their weld detection. For example, the pipelines of multi-stream heat exchangers are densely arranged and the space is limited, making it difficult for detection equipment to enter, especially large non-destructive testing equipment, which increases the difficulty of detection. The welds in the heat exchanger are of various forms, which may include butt welds, fillet welds, etc., and the welds are irregular in shape, making it difficult for the detection probe to fully contact the weld surface, affecting the detection accuracy. Multi-stream heat exchangers usually require multi-layer welding, and the weld thickness is large, which increases the difficulty of detecting internal defects. There are many welds and complex locations. Defects may be located in different layers or in different directions, which increases the difficulty of locating and accurately evaluating defects. Due to the large number of welds and the high inspection frequency, the inspection time and cost increase significantly. Especially for the periodic inspection and evaluation of high-voltage equipment, the economic efficiency of inspection becomes a major challenge.

[0003] At present, the weld inspection of multi-stream high-pressure heat exchangers mainly adopts non-destructive testing methods such as ultrasonic testing, X-ray testing, magnetic particle testing and penetration testing. Traditional ultrasonic testing and X-ray testing equipment are large in size, which is not convenient to operate inside the heat exchanger with a small space, and the detection probe is difficult to fully contact with the irregular weld surface, which affects the detection results. In addition, traditional detection methods have limitations in the identification and location of defects inside multi-layer welds, making it difficult to accurately evaluate the quality and defect location of welds. Due to the complexity of the equipment and cumbersome operation, the existing detection methods also have obvious shortcomings in terms of cost and detection efficiency.

[0004] For weld inspection of multi-stream high-pressure heat exchangers, the existing inspection equipment is difficult to meet the actual needs in terms of accuracy, flexibility and economy. Therefore, it is of great application value to develop a portable, high-precision weld inspection device suitable for small spaces, which can accurately inspect irregular weld surfaces. Summary of the invention

[0005] In view of the defects and problems existing in the prior art, the present invention provides a portable multi-stream high-pressure heat exchanger pipeline weld detection device, which aims to solve the problem of multi-stream high-pressure heat exchanger pipeline weld detection. It can achieve precise detection through a compact and portable design and meet the high-frequency detection needs of multiple welds, dense layout and small space.

[0006] The solution of the present invention to solve the technical problem is: a portable multi-stream high-pressure heat exchanger pipeline weld detection device is adopted, including a bracket assembly, a detection assembly and an output line group, and also including a driving assembly and an air supply system, wherein the driving assembly is installed at the front end of the bracket assembly, and the driving assembly is used to drive the detection shaft to rotate, and the detection assembly is installed at the front end of the detection shaft; the detection assembly includes a main column and an auxiliary column, the rear end of the main column is fixed to the detection shaft, the side of the main column is connected to the auxiliary column, the main column and the auxiliary column are combined to form a cylindrical tube body, a perforation is set at the center of the front side of the main column and an ultrasonic sensor is installed. The probe is provided with a filling body in the lumen of the main column, the rear end of the ultrasonic probe is fixed in the filling body, and the probe line connected to the filling body is embedded in the ultrasonic probe, and the probe line is guided downward as a detection data line; an embedding groove is provided on the rear side of the filling body, in which a gas spring is installed, the outer end of the gas spring is connected to the auxiliary column, and the inner end of the gas spring is provided with an inflation port, and the inflation port is downwardly connected to the inflation tube; the probe line and the inflation tube are respectively located in the lumen of the detection shaft; the air source device supplies air to the detection shaft to ensure that the ultrasonic probe of the detection component can fit tightly to the inner wall of the corresponding tube to be detected.

[0007] Preferably, the output line group includes a conductive ring, a detection line and a data line plug. A conductive ring is mounted on the outer wall portion of the detection shaft located at the rear side of the worm gear box, the outer end of the probe line is connected to the inner ring connector of the conductive ring, the outer ring connector of the conductive ring is connected to the detection line, the detection line is connected to the data line plug after being led outward, and the data line plug is fixed to the outer side of the side wall.

[0008] Preferably, an auxiliary positioning mechanism is also included, which includes a spring cylinder, a cylinder telescopic tube and a ring airbag. The spring cylinder contains a piston, and the piston divides the inner cavity of the spring cylinder into a front cavity and a rear cavity. The front cavity is provided with a spring, and the rear cavity is provided with a cylinder telescopic tube. The inner end of the cylinder telescopic tube is fixed to the piston, and a spring is provided on the outer side of the cylinder telescopic tube. The spring is supported between the piston and the rear end wall of the cylinder telescopic tube. The rear end of the cylinder telescopic tube is fixed to the front end of the bracket assembly. The cylinder telescopic tube contains an inner cavity, and a cylinder air pipe is connected to the middle of the exposed end of the cylinder telescopic tube, and the cylinder telescopic tube is provided with an inner air hole at the root of the piston. The outer side of the spring cylinder is provided with a ring airbag, and the rear cavity of the spring cylinder is connected to the ring airbag through a connecting pipe. A conical end is fixed to the front end of the spring cylinder. The conical end can guide the spring cylinder into the heat exchange tube.

[0009] Preferably, an adjustment component is also provided, which includes a guide seat and a slider. The guide seat is fixed on the top of the motor chamber, a guide rod is fixed between the left and right side walls of the guide seat, and a screw is installed in the middle of the left and right side walls. A through hole is provided in the middle of the slider and a screw sleeve is sleeved thereon. The screw and the screw sleeve are assembled together. A guide hole is also provided on the slider, and each guide hole is matched and sleeved on the corresponding guide rod; a knob is installed on the end of the screw, a longitudinal tube is fixed on the top of the slider, and the exposed end of the cylinder telescopic tube is sleeved in the longitudinal tube.

[0010] Preferably, the driving assembly includes a worm gear box, a worm wheel and a worm, a worm wheel is transversely installed at the upper part of the inner cavity of the worm gear box, and a worm is transversely installed at the lower part of the worm gear box, the worm wheel is meshed with the worm, and the motor is connected to the worm through a transmission mechanism.

[0011] Preferably, a driving chamber is provided on the left side of the bottom of the worm gear box, the side wall of the driving chamber is connected to the worm gear box, the driving chamber includes a motor chamber and a transmission chamber, and the motor is installed in the motor chamber; a driving shaft is led out from one end of the worm, and the driving shaft is directly connected to the motor shaft, or a rotary on-off valve and / or a rotary stop mechanism is installed in the transmission chamber, and the motor shaft is connected to the driving shaft through the rotary on-off valve and / or the rotary stop mechanism.

[0012] Preferably, the rotary on-off valve includes a rotating column and a fixed sleeve, the left side of the rotating column is fixedly connected to the rotating shaft of the motor, the outer side of the rotating column is sleeved with a fixed sleeve, and the fixed sleeve is fixed to the inner wall of the transmission chamber through an inner support rod; a through hole penetrating the center of the rotating column is provided on the side wall of the rotating column, and a lower fixed hole and an upper fixed hole corresponding in position are respectively provided at the bottom and top of the fixed sleeve; a blind hole is provided on the side wall of the rotating column, and a side hole is provided at the end of the rotating column, and each blind hole is connected to the corresponding side hole.

[0013] Preferably, the rotation stop mechanism comprises a main turntable, an auxiliary turntable and a torsion spring, the auxiliary turntable is fixedly connected to the driving shaft, and the torsion spring is mounted inside the main turntable and the auxiliary turntable.

[0014] Preferably, a limit stopper is threadedly mounted on the outer side of the detection shaft, and the limit stopper is located at the rear side of the detection component.

[0015] Preferably, the air supply system comprises an air supply pipe and an air chamber, the air chamber is provided with a fixed air port and a rotary joint, the air supply pipe is connected to the fixed air port of the air chamber, and the rear end of the detection shaft is connected to the rotary joint.

[0016] Beneficial effects of the present invention: The portable multi-stream high-pressure heat exchanger pipeline weld detection device of the present invention, through the precise combination of pneumatic and mechanical structures, not only ensures the miniaturized design of the equipment, but also solves the detection problem. It can meet the high-frequency weld detection needs and is particularly suitable for periodic detection and evaluation of high-pressure equipment.

[0017] 1. Portable design: The device is compact in design, easy to carry and operate, and can be operated in the narrow space of the heat exchanger, effectively solving the problem of limited access to the multi-stream high-pressure heat exchanger pipeline weld inspection equipment.

[0018] 2. Adjustable bracket assembly: Through the various adjustment functions of the bracket assembly, the device can adapt to the weld inspection requirements of heat exchange tubes with different apertures. The combined design of the adjustment assembly and the auxiliary positioning mechanism improves the stability of the device, enabling it to achieve accurate inspection in pipes of different sizes.

[0019] 3. Linkage between drive and detection components: The drive component controls the rotation of the detection component through the worm gear, worm and rotary on-off valve to achieve alternating inflation and rotation, so that the probe can intermittently contact the inner wall of the heat exchange tube during the detection process, thereby completing high-precision detection without damaging the inner wall.

[0020] 4. Automatic rotation and stop alternation function: The rotation stop mechanism enables the detection component to automatically rotate and stop alternately during detection, ensuring the stability and accuracy of the ultrasonic probe at different positions. The application of the torsion spring plays a buffering role during the rotation and stop process, making the detection action smoother. The rotary on-off valve is linked with the rotation stop mechanism: By combining the rotary on-off valve with the rotation stop mechanism, the alternation of air supply and exhaust during the detection process is realized, ensuring that the probe can be detected at different positions, with stronger adaptability.

[0021] 5. Auxiliary positioning structure: The auxiliary positioning mechanism uses spring cylinders, ring airbags and other designs to provide stable support for the detection components to prevent the detection from tilting or spinning due to the weight of the device. This structure further improves the operational stability and applicability of the equipment in multi-stream high-pressure heat exchangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is one of the three-dimensional structural schematic diagrams of the detection device of the present invention; Figure 2 This is the second schematic diagram of the three-dimensional structure of the detection device of the present invention; Figure 3 yes Figure 1 Schematic diagram of the internal structure of the drive component; Figure 4 yes Figure 2 A top view of Figure 5 yes Figure 2 Side view of Figure 6 yes Figure 5 Schematic diagram of the AA section structure; Figure 7 yes Figure 5 Schematic diagram of the structure of the middle BB section; Figure 8 It is a schematic diagram of the structure of the detection component; Fig. 9 It is a schematic diagram of the structure of the gas adjustment knob; Fig.10 yes Figure 6 Schematic diagram of the enlarged structure of part E in the middle.

[0023] Numbers in the figure: bracket assembly 1; drive assembly 2; detection assembly 3; output line group 4; air supply system 5; adjustment assembly 8; air adjustment knob 9; side wall 11; middle connecting plate 12; main handle 13; auxiliary handle 14; start switch 15; worm gear box 21; worm gear 22; shaft frame 23; worm 24; motor 25; drive shaft 26; detection shaft 27; guide head 28; limit stopper 29; main column 31; auxiliary column 32; filling body 33; ultrasonic probe 34; probe line 35; spring chamber 36; gas spring 37; inflation port 38; inflation tube 39; conductive ring 41; detection line 42; data line plug 43; front air supply tube 51; rear air supply tube 52 ; air chamber 53; rotary joint 54; sealing ring 55; rotary on-off valve 56; rotary stop mechanism 57; air source pipe 58; cylinder air pipe 59; rotating column 61; fixing sleeve 62; perforation 63; lower fixed hole 64; upper fixed hole 65; blind hole 66; side hole 67; main turntable 71; auxiliary turntable 72; torsion spring 73; torsion spring seat 74; guide seat 81; slider 82; guide rod 83; screw 84; knob 85; spring cylinder 86; cylinder telescopic tube 87; ring airbag 88; tapered end 89; fixing sleeve 91; rotating body 92; knob 93; pointer 94; internal airway 95; air source interface 96; air supply inlet and outlet 97; exhaust port 98; cylinder pipe port 99. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Embodiment 1: There are many pipes and welds in the multi-stream high-pressure heat exchanger. The pipes are densely arranged and the space is limited, which makes it difficult for the detection equipment to enter. The large non-destructive testing equipment is difficult to use. In addition, the multi-stream heat exchanger has various welds (butt welds, fillet welds, etc.) and irregular weld shapes, which makes it difficult for the detection probe to fully contact the weld surface, increasing the difficulty of detection. This embodiment adopts a method such as Figure 1 The portable multi-stream high-pressure heat exchanger pipeline weld inspection device shown is mainly designed to address the above-mentioned problems. The device is compact and can inspect the welds of each heat exchange tube port one by one from the outer end of the tube sheet. It can meet the needs of a large number of welds and a high inspection frequency, and is suitable for periodic inspection and evaluation of high-pressure equipment.

[0026] like Figure 1As shown, the device mainly includes a support assembly 1, a drive assembly 2, a detection assembly 3, an output line group 4, an air supply system 5, an adjustment assembly 8 and an air adjustment knob 9, and an air source device. Figure 1 and Figure 2 It can be seen that the bracket assembly 1 includes a side wall 11, a central connecting plate 12, a main handle 13, an auxiliary handle 14 and a start switch 15, etc. The left and right side walls 11 are arranged symmetrically (the outer decorative layer is deleted), and the central connecting plate 12 is fixed in the middle between the left and right side walls 11, and the main handle 13 is fixed at the rear. An auxiliary positioning mechanism (installed on the adjustment assembly 8) is fixedly installed on the left side of the front of the side walls 11 on both sides, and the driving assembly 2 is installed on the right side, wherein the detection assembly 3 is installed at the front end of the driving assembly 2. The driving assembly 2 is mainly used to control the rotation of the detection assembly 3 in the heat exchange tube port, and the detection assembly 3 is responsible for the weld detection of the inner wall position of the heat exchange tube port. The start switch 15 is installed at one end of the main handle 13 for easy control, and the start switch 15 is used to control the opening and closing of the motor 25 of the driving assembly 2. The air source device is an external air source, such as an air compressor or an air pump, and the air source device supplies air to the detection assembly 3 to ensure that the ultrasonic probe 34 of the detection assembly 3 can fit closely to the inner wall of the corresponding tube to be detected. A filling and exhaust control mechanism (such as a rotary on-off valve 56 or a solenoid valve) can also be provided on the gas supply path. When the gas source device supplies gas to the detection component 3, the gas is supplied intermittently to realize the alternation of filling and rotation. During operation, the detection component 3 is assembled on the inner wall of the port of the heat exchange tube to be detected, and the auxiliary positioning mechanism is assembled in the non-detection heat exchange tube adjacent to the heat exchange tube to be detected, so as to improve the overall stability and prevent the detection component 3 from spinning or tilting due to the weight of the device. The device is compact and portable, can be operated in a small space, adapts to the characteristics of densely arranged pipelines of multi-stream high-pressure heat exchangers, and solves the problem of difficult access for traditional detection equipment. Since the detection is carried out through the insertion detection method from the front port of the tube sheet, it can adapt to various weld types such as butt welds and fillet welds, and the contact method between the probe and the weld can be adjusted so that it can cope with irregular weld shapes and improve the detection accuracy.

[0027] like Figure 8 As shown, the detection assembly 3 includes a main column 31, an auxiliary column 32, a filling body 33, an ultrasonic probe 34, a probe line 35, a spring chamber 36, a gas spring 37, an air inlet 38 and an air inlet tube 39, and a detection shaft 27. The rear end of the main column 31 is fixed to the detection shaft 27, the front end of the main column 31 is fixed to the guide head 28, the side of the main column 31 is connected to the auxiliary column 32, and a guide tube and a guide rod are arranged between the main column 31 and the auxiliary column 32, so that the auxiliary column 32 can slide outward relative to the main column 31 to expand, or slide inward relative to the main column 31 to shrink. The main column 31 and the auxiliary column 32 are combined to form a cylindrical tube body.

[0028] like Figure 8In the embodiment, a perforation is set in the center of the front side of the main column 31 and an ultrasonic probe 34 is set therein, and a filling body 33 is set therein in the tube cavity of the main column 31, the rear end of the ultrasonic probe 34 is fixed in the filling body 33, and a probe line 35 connected to the filling body 33 is embedded in the ultrasonic probe 34, and the probe line 35 is guided downward as a detection data line. An embedding groove is set on the rear side of the filling body 33, and a gas spring 37 is set therein, the outer end of the gas spring 37 is connected to the auxiliary column 32, and the inner end of the gas spring 37 is set with an inflation port 38, and the inflation port 38 is connected to the inflation tube 39 downward. The probe line 35 and the inflation tube 39 are respectively located in the tube cavity of the detection shaft 27.

[0029] like Figure 2 and Figure 7 As shown, the output line group 4 includes a conductive ring 41, a detection line 42 and a data line plug 43. The conductive ring 41 is mounted on the outer wall of the detection shaft 27 located at the rear side of the worm gear box 21, the outer end of the probe line 35 is connected to the inner ring connector of the conductive ring 41, the outer ring connector of the conductive ring 41 is connected to the detection line 42, the detection line 42 is connected to the data line plug 43 after being led out, and the data line plug 43 is fixed to the outer side of the side wall 11.

[0030] like Figure 3 , Figure 6 and Figure 7 As shown, the driving assembly 2 includes a worm gear box 21, a worm wheel 22, a shaft frame 23, a worm 24, a motor 25, a driving shaft 26, and a limit stopper 29. The worm wheel 22 is transversely installed at the upper part of the inner cavity of the worm gear box 21, and the worm 24 is transversely installed at the lower part of the worm gear box 21, and the worm wheel 22 is meshed with the worm 24. The motor 25 is connected to the worm 24 through a transmission mechanism.

[0031] Specifically, the front and rear end walls of the worm gear box 21 are respectively provided with shaft holes, and the inner wall of each shaft hole is fixedly mounted with a shaft frame 23. A shaft tube is fixed at the center of the worm gear 22, and the front and rear ends of the shaft tube are respectively mounted on the inner side of the shaft frame 23 through front and rear bearings. The detection shaft 27 is inherently sleeved in the center of the shaft tube of the worm gear 22, so that the detection shaft 27 can rotate with the worm gear 22.

[0032] When the detection shaft 27 is inserted into the heat exchange tube port, the guide head 28 located at the front end of the detection component 3 can guide the detection component 3 into the heat exchange tube port to be detected. A limit baffle 29 is also threadedly installed on the outside of the detection shaft 27, and the limit baffle 29 is located at the rear side of the detection component 3. By adjusting the front and rear positions of the limit baffle 29 on the detection shaft 27, the depth of the detection component 3 entering the heat exchange tube port can be limited, which meets the requirements of weld detection of different depths and improves the flexibility of detection.

[0033] like Figure 6As shown, the left and right ends of the worm 24 are respectively installed in the bearing frame at the bottom of the worm gear box 21 through its left and right bearings, and a driving chamber is provided on the left side of the bottom of the worm gear box 21, and the side wall of the driving chamber is connected to the worm gear box 21. The driving chamber includes a motor chamber and a transmission chamber, and the motor 25 is installed in the motor chamber.

[0034] One end of the worm 24 leads out a drive shaft 26, and the drive shaft 26 is directly connected to the rotating shaft of the motor 25. Alternatively, in order to realize alternating inflation and rotation, a rotary on-off valve 56 and / or a rotary stop mechanism 57 are installed in the transmission chamber. The rotary on-off valve 56 and the rotary stop mechanism 57 are installed alone or at the same time. Method 1: When only the rotary on-off valve 56 is installed in the transmission chamber, the rotating shaft of the motor 25 is connected to one side of the rotating column 61 of the rotary on-off valve 56, and the other side of the rotating column 61 is connected to the drive shaft 26. The function of the rotary on-off valve 56 is to realize alternating air supply and exhaust of the air circuit; Method 2: When only the rotary stop mechanism 57 is installed in the transmission chamber, the rotating shaft of the motor 25 is connected to the main turntable 71 of the rotary stop mechanism 57, and the auxiliary turntable 72 of the rotary stop mechanism 57 is connected to the drive shaft 26. The function of the rotary stop mechanism 57 is to realize alternating inflation and rotation. 5 to the drive shaft 26 to rotate and stop alternately; mode three: when the rotary on-off valve 56 and the rotary stop mechanism 57 are installed in the transmission chamber at the same time, the rotating shaft of the motor 25 is connected to one side of the rotating column 61 of the rotary on-off valve 56, and the other side of the rotating column 61 is connected to the main rotary disk 71 of the rotary stop mechanism 57, and the auxiliary rotary disk 72 of the rotary stop mechanism 57 is connected to the drive shaft 26. The rotary on-off valve 56 and the rotary stop mechanism 57 are installed at the same time, which can realize the alternating supply and exhaust and the alternating rotation and stop of the drive shaft 26 at the same time.

[0035] like Fig.10 As shown, the rotary on-off valve 56 includes a rotary column 61, a fixed sleeve 62, a perforation 63, a lower fixed hole 64, an upper fixed hole 65, a blind hole 66 and a side hole 67. The left side of the rotary column 61 is fixedly connected to the rotating shaft of the motor 25. The outer side of the rotary column 61 is provided with a fixed sleeve 62, and the fixed sleeve 62 is fixed to the inner wall of the transmission chamber through an inner support rod. A perforation 63 that runs through the center of the rotary column 61 is provided on the side wall of the rotary column 61, a lower fixed hole 64 is provided at the bottom of the fixed sleeve 62, and an upper fixed hole 65 is provided at the top, and the lower fixed hole 64 corresponds to the upper fixed hole 65. When the rotary column 61 rotates, the perforation 63 can correspond to the lower fixed hole 64 and the upper fixed hole 65 at the same time. At this time, the lower fixed hole 64 is connected to the upper fixed hole 65, and the pressurized gas enters the upper fixed hole 65 from the lower fixed hole 64, and inflates the detection component 3 through the detection shaft 27. This process corresponds to the inflation state. A blind hole 66 is provided on the side wall of the rotating column 61, and a side hole 67 is provided at the end of the rotating column 61. Each blind hole 66 is connected to the corresponding side hole 67. When the upper fixed hole 65 is connected to the blind hole 66, the gas in the detection component 3 is transported backward through the detection shaft 27, and finally enters the blind hole 66 from the lower fixed hole 64 and is discharged from the side hole 67. This process corresponds to the exhaust state.

[0036] like Fig.10 As shown, the rotation stop mechanism 57 includes a main turntable 71, an auxiliary turntable 72, a torsion spring 73 (weak force) and a torsion spring seat 74. The main turntable 71 is parallel to the auxiliary turntable 72 and is spaced apart. The auxiliary turntable 72 is fixedly connected to the drive shaft 26. A torsion spring seat 74 is provided in the main turntable 71 and the auxiliary turntable 72 respectively. A torsion spring 73 is sleeved on the outside of the drive shaft 26, and both ends of the torsion spring 73 are supported in the corresponding torsion spring seat 74. Therefore, when the main turntable 71 (driven by the click 25 shaft or the rotating column 61) rotates, the main turntable 71 transmits the rotation torque to the auxiliary turntable 72 through the torsion spring 73.

[0037] When the above method 3 is adopted, that is, Fig.10 In the structural form shown, if the detection component 3 is in the inflated state at this time, the rotation resistance of the detection component 3 is very large and it cannot rotate, that is, the auxiliary turntable 72 does not rotate either. At this time, the torsion of the torsion spring 73 continuously increases the torsion potential energy. When waiting for the rotary on-off valve 56 to rotate to the exhaust state, the detection component 3 shrinks due to exhaust. At this time, there is no rotation resistance. The torsion potential energy of the torsion spring 73 is released and transmitted to the auxiliary turntable 72 to make it rotate instantly, thereby causing the detection component 3 to rotate a small angle again. The linkage of the rotation stop mechanism and the rotary on-off valve allows the detection component to alternate between fitting and detaching from the weld surface, realizing high-precision detection of the ultrasonic probe at different positions and ensuring the integrity of the detection.

[0038] Thus, when the detection component 3 is inflated and then stops, the ultrasonic probe 34 of the detection component 3 can fit tightly against the inner wall of the heat exchange pipe port, and at this time it is briefly stopped, so that it can complete accurate detection. When the detection component 3 is exhausted and then rotated, the ultrasonic probe 34 of the detection component 3 is separated from the fit with the inner wall of the heat exchange pipe port. At this time, it is a rotation process. The rotation effect can change the different corresponding positions of the ultrasonic probe 34 and the inner wall of the heat exchange pipe port, so that the new position can be detected next time. Through the above process, the main turntable 71 rotates continuously, the auxiliary turntable 72 rotates and stops alternately, and the torsion spring 73 stores energy when it stops. Thus, the detection component 3 can complete the alternating action of rotation and stopping. When stopped, the ultrasonic probe 34 is close to the detected surface, and when rotating, it is separated from the detected surface.

[0039] like Figure 6 and Figure 7As shown, the air supply system 5 includes a front air supply pipe 51, a rear air supply pipe 52, an air chamber 53, a rotary joint 54, a sealing ring 55, a rotary on-off valve 56, a rotary stop mechanism 57, an air source pipe 58 and a cylinder air pipe 59. An air chamber 53 is fixed on the central connecting plate 12, and the air chamber 53 is provided with a fixed air port and a rotary joint 54. The air supply pipe (including the front air supply pipe 51 and the rear air supply pipe 52. When the rotary on-off valve 56 is not used, the front air supply pipe 51 and the rear air supply pipe 52 are directly connected) is connected to the fixed air port of the air chamber 53, and the rear end of the detection shaft 27 is connected to the rotary joint 54. The rotary joint 54 can be selected from any existing adaptation specifications. A simplified structure is that a sealing ring 55 is sleeved on the inner wall of the perforated sleeve, and the rear end of the detection shaft 27 is matched and sleeved in the perforated sleeve, and a sealing ring 55 is sleeved on the inner wall of the perforated sleeve.

[0040] When the rotary on-off valve 56 is used, the front air supply pipe 51 is connected to the lower fixed hole 64 , and the rear air supply pipe 52 is connected between the upper fixed hole 65 and the fixed air port of the air chamber 53 .

[0041] In order to ensure the stability of the installation state of the detection shaft 27 and the detection component 3 at the front end, the front end side of the bracket component 1 ( Figure 1 An auxiliary positioning mechanism is provided (not shown on the left side). Figure 2 and Figure 3 As shown, it includes a spring cylinder 86, a cylinder telescopic tube 87 and a ring airbag 88. The spring cylinder 86 contains a piston, which divides the inner cavity of the spring cylinder 86 into a front cavity (distal end) and a rear cavity (proximal end). The front cavity is sleeved with a spring, and the rear cavity is sleeved with a cylinder telescopic tube 87. The inner end of the cylinder telescopic tube 87 is fixed to the piston, and a spring is sleeved on the outer side of the cylinder telescopic tube 87. The spring is supported between the piston and the rear end wall of the cylinder telescopic tube 87. The rear end of the cylinder telescopic tube 87 is fixed to the front end of the bracket assembly 1.

[0042] The cylinder telescopic tube 87 has an inner cavity, and the middle of the exposed end of the cylinder telescopic tube 87 is connected to the cylinder air pipe 59, and the cylinder telescopic tube 87 is provided with an inner air hole at the root of the piston. The outer side of the spring cylinder 86 is sheathed with an annular air bag 88, and the rear cavity of the spring cylinder 86 is connected to the annular air bag 88 through the connecting pipe 80. A conical end 89 is fixed at the front end of the spring cylinder 86. The conical end 89 can guide the spring cylinder 86 into the heat exchange tube (the heat exchange tube not tested temporarily).

[0043] When the detection device is in use, the auxiliary positioning mechanism is used to first insert the spring cylinder 86 into the heat exchange pipe that is adjacent to the heat exchange pipe to be detected and not to be detected, and at the same time, the detection component 3 is sent into the heat exchange pipe to be detected. After the cylinder telescopic tube 87 carries the spring cylinder 86 into the heat exchange pipe, when the cylinder air pipe 59 is inflated, the gas can enter the rear cavity of the spring cylinder 86 through the inner cavity of the cylinder telescopic tube 87 and its inner air hole, and then enter the annular airbag 88 through the connecting pipe 80. After the annular airbag 88 collides and is pressed against the inner wall of the heat exchange pipe, the annular airbag 88 cannot continue to collide. At this time, the gas located in the rear cavity of the spring cylinder 86 will compress the front cavity spring, thereby causing the piston to move forward. When the piston moves forward, it can drive the cylinder telescopic tube 87, that is, the entire device, to move forward as a whole, thereby causing the limit baffle 29 to be pressed against the outer wall of the heat exchange pipe to be detected. At this time, the detection component 3 is located inside the port of the heat exchange pipe to be detected, and the above detection process can be performed. The auxiliary positioning structure allows the device to be stably fixed during the detection process, avoiding the tilt or rotation of the detection component due to its own weight, and ensuring effective contact between the probe and the weld surface.

[0044] like Figure 2 and Figure 3 As shown, an adjustment assembly 8 is also provided, which includes a guide seat 81, a slider 82, a guide rod 83, a screw 84 and a knob 85. A guide seat 81 is fixed on the top of the motor chamber, a guide rod 83 is fixed between the left and right side walls of the guide seat 81, and a screw 84 is installed in the middle of the left and right side walls. A through hole is set in the middle of the slider 82 and a screw sleeve is set, and the screw 84 and the screw sleeve are assembled together. The slider 82 is also provided with a guide hole, and each guide hole is matched and sleeved on the corresponding guide rod 83. A knob 85 is installed at the end of the screw 84, and when the knob 85 is turned, the slider 82 can be driven to move horizontally left and right. A longitudinal tube is fixed on the top of the slider 82, and the exposed end of the cylinder telescopic tube 87 is sleeved in the longitudinal tube (a locking wire is set on the side wall of the longitudinal tube, and the cylinder telescopic tube 87 can be axially adjusted and locked). Based on the above-mentioned adjustment component 8, the distance between the spring cylinder 86 and the detection shaft 27 can be changed, so as to be suitable for the detection of welds of heat exchange tubes with different apertures.

[0045] Since the above device has many inflation pipelines, in order to simplify the operation, a method such as Fig. 9The air regulating knob 9 shown in the figure. The air regulating knob 9 comprises a fixed sleeve 91, a rotating body 92, a knob 93, a pointer 94, an inner airway 95, an air source interface 96, an air supply inlet and outlet 97, an exhaust port 98 and a cylinder pipe port 99. The rotating body 92 is matched with the fixed sleeve 91, the center of the rotating body 92 is connected to the knob 93, and a pointer 94 is fixed on the knob 93. When the knob 93 is rotated, the rotating body 92 can be driven to rotate, and the rotation of the rotating body 92 located inside can be understood by penetrating the pointer 94. Four air ports are evenly distributed around the fixed sleeve 91, such as Fig. 9 The four air ports ABCD correspond to the air source interface 96, the air supply inlet and outlet 97, the exhaust port 98 and the cylinder pipe port 99 respectively. At the same time, an internal air duct 95 is arranged in the rotating body 92, and the two ends of the internal air duct 95 are M and N respectively. Among them, the air source interface 96 is connected to the air source pipe 58, the air supply inlet and outlet 97 is connected to the front air supply pipe 51, and the cylinder pipe port 99 is connected to the cylinder air pipe 59. The first step is to adjust so that the M end corresponds to the A end and the N end corresponds to the D end. At this time, the air source pipe 58 inflates the cylinder air pipe 59, that is, the process of moving the cylinder telescopic pipe 87 forward is completed; the second step is to adjust so that the M end corresponds to the B end and the N end corresponds to the A end. At this time, the air source pipe 58 inflates the front air supply pipe 51, which is the working process; the third step is to adjust so that the M end corresponds to the C end and the N end corresponds to the B end. At this time, the front air supply pipe 51 is exhausted and is in a stopped working state, and the exhaust port detection component 3 is reset and contracted; the fourth step is to control so that the M end corresponds to the D end and the N end corresponds to the C end. At this time, the spring cylinder 86 and the ring air bag 88 are exhausted to the outside respectively, and the whole device can be pulled out after exhausting. The integrated operation is realized by the air adjustment knob, which makes the air supply, exhaust, inflation and stop process of the air circuit simpler and more accurate, effectively simplifies the operation, improves the convenience of use, and completes a detection process. It only needs to rotate the rotating body 92 counterclockwise to the initial position for one circle, thereby simplifying the operation and being convenient to use.

[0046] The detection device has significant technical effects in terms of portability, adaptability, high-precision detection, ease of operation and stability, meeting the multiple requirements of multi-stream high-pressure heat exchanger weld detection, and is particularly suitable for periodic detection and evaluation of high-pressure equipment, effectively improving detection efficiency. The following is the use process of the detection device.

[0047] 1. Installation and preparation: Install the bracket assembly and auxiliary positioning mechanism of the detection device near the heat exchanger pipe to be tested. Adjust the position of the bracket assembly so that the device can enter the pipe to be tested and ensure the stability of the equipment. The initial installation is required to make the device stable to ensure that the detection accuracy will not be affected by the loose bracket during the detection process.

[0048] 2. Auxiliary positioning: Insert the spring cylinder in the auxiliary positioning mechanism into the non-inspected pipe adjacent to the heat exchange pipe to be inspected. Control the inflation into the cylinder telescopic tube to expand the annular airbag in the pipe to increase the stability of the device. The support of the annular airbag prevents the device from tilting due to its own weight or vibration during the inspection process, ensuring that the ultrasonic probe maintains stable contact with the weld surface.

[0049] 3. Adjust the detection depth: According to the depth of the weld to be detected, control the insertion depth of the detection component by adjusting the position of the limit stopper. Insert the detection component to the specified depth and fix the limit stopper. Ensure that the probe can reach the weld position to achieve full coverage detection of the weld.

[0050] 4. Start the equipment and adjust the gas source: turn on the gas source device and control the gas supply and exhaust process through the gas adjustment knob. Inflate the detection component to make the ultrasonic probe close to the inner wall of the heat exchange pipe. The ultrasonic probe is close to the inner wall of the pipe during the inflation process to avoid gaps, ensure good contact between the probe and the weld surface, and improve the detection accuracy.

[0051] 5. Start detection and rotation: Start the drive assembly and control the detection assembly to start rotating. By using the alternating action of the rotary on-off valve and the rotary stop mechanism, the detection assembly stops when inflating and rotates when exhausting, thereby achieving intermittent contact between the probe and the weld surface. By alternating rotation and stopping, the probe can accurately detect different positions on the weld surface to ensure complete coverage of the weld.

[0052] 6. Data collection and transmission: During the detection process, the ultrasonic probe transmits the detection signal to the conductive ring, and transmits the signal to the external data acquisition device through the detection line and data line plug for recording and analysis. Real-time data collection is achieved, which is convenient for subsequent analysis of the structure and integrity of the weld.

[0053] 7. Cycle detection: Detect each pipe port weld one by one, repeat the cycle of inflation, detection and exhaust rotation. After completing the detection of a pipe weld, release the auxiliary positioning mechanism and move the detection component to the next pipe for detection. It can flexibly adapt to the detection needs of multiple pipes, improve detection efficiency, and is suitable for high-frequency detection tasks.

[0054] 8. Dismantle the device and clean it: After completing all weld inspections, turn off the gas source and drain the ring airbag, remove the auxiliary positioning mechanism and device from the heat exchanger pipe, clean the device and store it. The equipment is easy to disassemble and easy to operate, which provides convenience for subsequent reuse.

[0055] The above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

Claims

1. A portable multi-stream high-pressure heat exchanger pipeline weld detection device, comprising a support assembly (1), a detection assembly (3) and an output line assembly (4), characterized in that: The device also comprises a driving assembly (2) and an air supply system (5), wherein the driving assembly (2) is mounted at the front end of the support assembly (1), and is used to drive the detection shaft (27) to rotate. A detection assembly (3) is mounted at the front end of the detection shaft (27); the detection assembly (3) comprises a main column (31) and an auxiliary column (32), wherein the rear end of the main column (31) is fixed to the detection shaft (27), the side of the main column (31) is connected to the auxiliary column (32), and the main column (31) and the auxiliary column (32) are combined to form a cylindrical tube body, a perforation is provided at the center of the front side of the main column (31) and an inherent ultrasonic probe (34) is sleeved thereon, and an inherent filling body (33) is sleeved in the tube cavity of the main column (31), and the ultrasonic probe (34) is sleeved thereon. The rear end of the filling body (33) is fixed in the filling body (33), and the probe line (35) connected to the filling body (33) is embedded in the ultrasonic probe (34), and the probe line (35) is guided downward to serve as a detection data line; an embedding groove is provided on the rear side of the filling body (33), and a gas spring (37) is sleeved therein; the outer end of the gas spring (37) is connected to the auxiliary column (32), and the inner end of the gas spring (37) is provided with an inflation port (38), and the inflation port (38) is downwardly connected to an inflation tube (39); the probe line (35) and the inflation tube (39) are respectively located in the tube cavity of the detection rotating shaft (27); the air source device supplies air into the detection rotating shaft (27) to ensure that the ultrasonic probe (34) of the detection assembly (3) can be closely attached to the inner wall of the corresponding tube to be detected.

2. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1 is characterized in that: The output line group (4) comprises a conductive ring (41), a detection line (42) and a data line plug (43). The conductive ring (41) is mounted on the outer wall portion of the detection shaft (27) located at the rear side of the worm gear box (21). The outer end of the probe line (35) is connected to the inner ring connector of the conductive ring (41), and the outer ring connector of the conductive ring (41) is connected to the detection line (42). The detection line (42) is connected to the data line plug (43) after being led outward. The data line plug (43) is fixed to the outer side of the side wall (11).

3. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: The auxiliary positioning mechanism also includes a spring cylinder (86), a cylinder telescopic tube (87) and a ring airbag (88). The spring cylinder (86) contains a piston, and the piston divides the inner cavity of the spring cylinder (86) into a front cavity and a rear cavity. The front cavity is sleeved with a spring, and the rear cavity is sleeved with a cylinder telescopic tube (87). The inner end of the cylinder telescopic tube (87) is fixed to the piston, and a spring is sleeved on the outer side of the cylinder telescopic tube (87). The spring is supported between the piston and the cylinder telescopic tube. The rear end wall of the cylinder telescopic tube (87) is fixed to the front end of the bracket assembly (1); the cylinder telescopic tube (87) contains an inner cavity, the middle part of the exposed end of the cylinder telescopic tube (87) is connected to the cylinder air pipe (59), and the cylinder telescopic tube (87) is provided with an inner air hole at the root of the piston; the outer side of the spring cylinder (86) is sleeved with an annular air bag (88), and the rear cavity of the spring cylinder (86) is connected to the annular air bag (88) through a connecting pipe (80). A conical end (89) is fixed at the front end of the spring cylinder (86), and the conical end (89) can guide the spring cylinder (86) into the heat exchange tube.

4. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 3 is characterized in that: An adjustment assembly (8) is also provided, which includes a guide seat (81) and a slider (82). The guide seat (81) is fixed on the top of the motor chamber, a guide rod (83) is fixed between the left and right side walls of the guide seat (81), and a screw rod (84) is installed in the middle of the left and right side walls. A through hole is provided in the middle of the slider (82) and a screw sleeve is sleeved thereon. The screw rod (84) and the screw sleeve are assembled together. The slider (82) is also provided with a guide hole, and each guide hole is matched and sleeved on a corresponding guide rod (83). A knob (85) is installed at the end of the screw rod (84). A longitudinal tube is fixed on the top of the slider (82), and the exposed end of the cylinder telescopic tube (87) is sleeved and fixed in the longitudinal tube.

5. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: The driving assembly (2) comprises a worm gear box (21), a worm wheel (22) and a worm (24); the worm wheel (22) is transversely mounted on the upper part of the inner cavity of the worm gear box (21); the worm (24) is transversely mounted on the lower part of the inner cavity of the worm gear box (21); the worm wheel (22) is meshed with the worm (24); and the motor (25) is connected to the worm (24) via a transmission mechanism.

6. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 5, characterized in that: A drive chamber is provided on the left side of the bottom of the worm gear box (21), the side wall of the drive chamber being connected to the worm gear box (21), the drive chamber comprising a motor chamber and a transmission chamber, the motor (25) being installed in the motor chamber; a drive shaft (26) is led out from one end of the worm (24), the drive shaft (26) being directly connected to the rotating shaft of the motor (25), or a rotary on-off valve (56) and / or a rotary stop mechanism (57) being installed in the transmission chamber, the rotating shaft of the motor (25) being transmission-connected to the drive shaft (26) via the rotary on-off valve (56) and / or the rotary stop mechanism (57).

7. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: The rotary on-off valve (56) comprises a rotary column (61) and a fixed sleeve (62); the left side of the rotary column (61) is fixedly connected to the rotary shaft of the motor (25); the outer side of the rotary column (61) is sleeved with the fixed sleeve (62); the fixed sleeve (62) is fixed to the inner wall of the transmission chamber via an inner support rod; a through hole (63) penetrating the center of the rotary column (61) is provided on the side wall of the rotary column (61); a lower fixed hole (64) and an upper fixed hole (65) corresponding in position are provided at the bottom and top of the fixed sleeve (62); a blind hole (66) is provided on the side wall of the rotary column (61); and a side hole (67) is provided at the end of the rotary column (61); each blind hole (66) is communicated with a corresponding side hole (67).

8. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: The rotation stop mechanism (57) comprises a main rotating disk (71), an auxiliary rotating disk (72) and a torsion spring (73); the auxiliary rotating disk (72) is fixedly connected to the driving shaft (26); and the torsion spring (73) is sleeved inside the main rotating disk (71) and the auxiliary rotating disk (72).

9. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: A limit stopper (29) is also threadedly mounted on the outer side of the detection shaft (27), and the limit stopper (29) is located at the rear side of the detection assembly (3).

10. The portable multi-stream high-pressure heat exchanger pipeline weld detection device according to claim 1, characterized in that: The air supply system (5) comprises an air supply pipe and an air chamber (53); the air chamber (53) is provided with a fixed air port and a rotary joint (54); the air supply pipe is connected to the fixed air port of the air chamber (53); and the rear end of the detection shaft (27) is connected to the rotary joint (54).

Images