A flaw detection device for liquid heater processing

Abstract

The present invention relates to the field of fluorescent flaw detection technology, specifically a flaw detection device for liquid heater processing; it includes a machine body and a lower roller rotatably connected to the machine body; two of the lower rollers are transmission-connected to a conveyor belt; one of the lower rollers is driven by a first motor; the front and rear ends of the machine body are fixedly connected to an extension plate; the top of the machine body is fixedly connected to a flaw detection box; the front and rear sides of the flaw detection box are both provided with openings; a shielding curtain is fixedly connected to the opening; a flaw detection camera and an ultraviolet lamp are fixedly connected to the top of the flaw detection box; a support plate is provided on the inside of the flaw detection box and on the left and right sides of the conveyor belt; the support plate is staggered with the conveyor belt; the present invention realizes flipping of the workpiece in the flaw detection box by driving the lower surface of the flip belt in opposite directions to the upper surface of the conveyor belt, and cooperating with the flip belt to move back and forth along the left and right directions, thereby ensuring more accurate flaw detection of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of fluorescent flaw detection, in particular to a flaw detection device used for processing liquid heaters. Background Art

[0002] A liquid heater is a device that heats liquids to a specific temperature. It plays a key role in a variety of fields, providing a reliable and effective solution for liquid heating. Typically, when a liquid heater is operating, liquid enters a container tube through an inlet pipe and flows downward along a straight pipe inside the container tube. After reaching the bottom of the container tube, the liquid flows upward along the gap between the outer and inner walls of the straight pipe. A heating wire inside the container tube heats the liquid, causing it to flow out through a liquid outlet pipe.

[0003] The end cap is the main component of the liquid heater and has an irregular block shape. Before processing, the end cap is a blank. It is inevitable that there are defects such as pores, slag inclusions, and cracks on the surface of the end cap blank. Therefore, flaw detection is required before processing to meet quality requirements. The fluorescent penetrant detection method can quickly, intuitively and accurately detect defects on the surface of the pipe fittings. The fluorescent penetrant detection method is mainly divided into three parts, including penetration, cleaning and flaw detection. After the end cap blank is penetrated with fluorescent liquid, cleaned and dried, the end cap blank is placed in the flaw detection equipment and irradiated with ultraviolet light. If there are defects on the surface of the end cap blank, they will appear. Due to its own shape, the end cap blank cannot roll and turn over like the pipe fitting, which causes the end cap blank in the current liquid heater to be not thoroughly detected. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, the present invention proposes a flaw detection equipment for liquid heater processing. The present invention realizes flipping of the workpiece in the flaw detection box by driving the lower surface of the flip belt in opposite directions to the upper surface of the conveyor belt, and cooperating with the flip belt to move back and forth along the left and right directions, thereby ensuring more accurate flaw detection of the workpiece.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the flaw detection equipment for liquid heater processing described in the present invention includes a machine body and a lower roller rotatably connected to the machine body; the two lower rollers are transmission-connected to the conveyor belt; one of the lower rollers is driven by a first motor; the front and rear ends of the machine body are fixedly connected to the extension plate; the top of the machine body is fixedly connected to the flaw detection box; the front and rear sides of the flaw detection box are both provided with openings; the opening is fixedly connected to a shielding curtain; the top of the flaw detection box is fixedly connected to a flaw detection camera and an ultraviolet lamp; a support plate is provided on the inside of the flaw detection box and on the left and right sides of the conveyor belt; the support plate and the conveyor belt are staggered; the two support plates are rotationally connected to the upper roller; the two upper rollers are transmission-connected to the flipping belt in the front and rear directions; one of the upper rollers is driven by a second motor; the transmission direction of the lower surface of the flipping belt is opposite to that of the upper surface of the conveyor belt, so as to realize the flipping of the workpiece for flaw detection.

[0006] Preferably, the upper roller outer wall is sleeved with an upper sleeve; the upper sleeve outer wall is provided with an annular groove; the flipping belt is transmission connected to the annular grooves on the two upper sleeve outer walls; the axial length of the upper sleeve is less than the length of the upper roller; the flipping belt and the conveyor belt are both made of elastic material; a shift plate is provided on the inner side of the flipping belt; a screw and a sliding rod are rotatably connected between the two support plates; the sliding rod is arranged close to one of the upper rollers, and the screw is arranged close to the upper roller at the other end; the sliding rod passes through the shift plate and is slidably connected to the shift plate, and the screw passes through the shift plate and is threadedly connected to the shift plate; the thread on the screw is a bidirectional thread; one end of the screw is driven by a third motor; the end of the shift plate is stuck in the corresponding annular groove.

[0007] Preferably, the outer wall of the upper roller is connected to the slide groove in an axial sliding manner; the slide groove is connected to the slider in an axial sliding manner; and the slider is fixed to the inner wall of the upper sleeve.

[0008] Preferably, the inner top of the flaw detection box is fixedly connected to an electric push rod; and the lower end of the electric push rod is fixedly connected to a corresponding support plate.

[0009] Preferably, a retaining groove is provided on the upper surface of the machine body; the retaining groove is located on the inner side of the flaw detection box; the two retaining grooves are located on both sides of the conveyor belt and are arranged close to the edge of the conveyor belt; the retaining groove is connected to the baffle for sliding up and down; the lower end of the baffle is connected to the bottom of the retaining groove through a first spring.

[0010] Preferably, a compensation groove is provided on the lower surface of the shift plate; a compensation block is slidably connected in the compensation groove; the upper end of the compensation block is connected to the bottom of the compensation groove through a second spring; the lower end of the compensation block is pressed against the inner surface of the flip belt under the action of the second spring force.

[0011] Preferably, the elastic force of the second spring is reduced as it approaches the edge position in the width direction of the flip belt; in the width direction of the flip belt, the distance between the lower surface of the flip belt and the lower surface of the paddle decreases as it approaches the edge position.

[0012] Preferably, the cross section of the shift plate is an inverted isosceles trapezoid; the lower surface of the shift plate is lower than the upper sleeve position in the vertical direction.

[0013] Preferably, the two support plates are provided with tensioning grooves extending axially along the upper roller; a tensioning block is slidably connected in the tensioning groove; the lower surface of the tensioning block and the lower end of the tensioning groove are connected by a third spring; a tensioning roller is rotatably connected between the two tensioning blocks; and the tensioning roller is in contact with the upper position of the inner wall of the flipping belt.

[0014] Preferably, the inner wall of the conveyor belt is provided with an anti-bending plate; the upper surface of the anti-bending plate is rollingly connected to a rolling roller; the upper surface of the anti-bending plate is in contact with the upper position of the inner wall of the conveyor belt; and the outer surface of the conveyor belt is evenly provided with anti-slip protrusions.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention realizes that the workpiece in the flaw detection box is turned over by the reverse transmission of the lower surface of the turning belt and the upper surface of the conveyor belt, and the turning belt moves back and forth along the left and right directions, thereby ensuring more accurate flaw detection of the workpiece.

[0017] 2. In the present invention, the compensation block is pressed against the inner wall of the flipping belt under the action of the elastic force of the second spring. Under the elastic force of the second spring, the compensation block is pressed against the upper surface of different workpieces through the lower surface of the flipping belt, so that the workpiece directly below the flipping belt can be in contact as much as possible. In this way, the workpiece is fully flipped under the transmission of the flipping belt, the situation of missing flipping of the workpiece is reduced, and the accuracy of workpiece flaw detection is further improved.

[0018] 3. The present invention limits the elastic force of the second spring to be smaller near the edge of the flip belt, so that the amplitude of the push-out of the lower surface of the flip belt is also smaller. In this way, when the middle position of the flip belt is stretched compared with the edge position, the edge position of the lower surface of the flip belt is tilted upward compared with the middle position. In this way, the flip belt can smoothly pass over the workpiece during the axial movement along the upper roller, reducing jamming and improving the working stability of the flaw detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 is a perspective view of the present invention;

[0021] Figure 2This is a diagram showing the internal structure of the flaw detection box of the present invention;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0024] Figure 5 yes Figure 2 Enlarged view of point C in the middle;

[0025] Figure 6 It is a cross-sectional view of the present invention in the left and right directions;

[0026] Figure 7 yes Figure 6 Enlarged view of point D in the middle;

[0027] Figure 8 It is a cross-sectional view in the front-to-back direction of the present invention;

[0028] Figure 9 yes Figure 8 Enlarged view of point E in the middle;

[0029] Figure 10 It is a three-dimensional diagram of the turning belt in the present invention.

[0030] In the figure: body 1, lower roller 11, conveyor belt 12, first motor 13, extension plate 14, baffle 15, baffle 16, first spring 17, protrusion 18, flaw detection box 2, opening 21, shielding curtain 22, flaw detection camera 23, ultraviolet lamp 24, electric push rod 25, support plate 3, screw 31, slide bar 32, third motor 33, tensioning block 34, third spring 35, tensioning roller 36, tensioning groove 37, upper roller 4, flip belt 41, second motor 42, upper sleeve 43, annular groove 44, slide groove 45, slider 46, dial plate 5, compensation groove 51, compensation block 52, second spring 53, anti-bending plate 6, rolling roller 61. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figures 1 to 10 As shown, the present invention includes the following embodiments:

[0033] Embodiment 1: A flaw detection device for liquid heater processing, comprising a body 1 and a lower roller 11 rotatably connected to the body 1; two of the lower rollers 11 are transmission-connected to a conveyor belt 12; one of the lower rollers 11 is driven by a first motor 13; the front and rear ends of the body 1 are fixedly connected to an extension plate 14; the top of the body 1 is fixedly connected to a flaw detection box 2; the front and rear sides of the flaw detection box 2 are both provided with openings 21; a shielding curtain 22 is fixedly connected to the opening 21; a flaw detection camera 23 and an ultraviolet lamp 24 are fixedly connected to the top of the flaw detection box 2; a support plate 3 is provided inside the flaw detection box 2 and on the left and right sides of the conveyor belt 12; the support plate 3 is staggered with the conveyor belt 12; an upper roller 4 is rotationally connected between the two support plates 3; the two upper rollers 4 are transmission-connected to a flipping belt 41 in the front and rear directions; one of the upper rollers 4 is driven by a second motor 42; the transmission direction of the lower surface of the flipping belt 41 is opposite to that of the upper surface of the conveyor belt 12, so as to realize the flipping of the workpiece for flaw detection.

[0034] In this embodiment, the outer wall of the upper roller 4 is sleeved with an upper sleeve 43; the outer wall of the upper sleeve 43 is provided with an annular groove 44; the turning belt 41 is transmission connected to the annular grooves 44 on the outer walls of the two upper sleeves 43; the axial length of the upper sleeve 43 is less than the length of the upper roller 4; the turning belt 41 and the conveyor belt 12 are both made of elastic material; a dial plate 5 is provided on the inner side of the turning belt 41; the two support plates 3 are rotatably connected with the screw 31 and the slide rod 32; the slide rod 32 is arranged near one of the upper rollers 4, and the screw 31 is arranged near the upper roller 4 at the other end; the slide rod 32 passes through the dial plate 5 and is slidably connected with the dial plate 5, and the screw 31 passes through the dial plate 5 and is threadedly connected with the dial plate 5; the thread on the screw 31 is a bidirectional thread; one end of the screw 31 is driven by the third motor 33; the end of the dial plate 5 is stuck in the corresponding annular groove 44.

[0035] In this embodiment, the outer wall of the upper roller 4 is slidably connected to the slide groove 45 along the axial direction; the slide groove 45 is slidably connected to the slider 46; and the slider 46 is fixedly connected to the inner wall of the upper sleeve 43.

[0036] After the staff has infiltrated, cleaned and dried the end cover blank in the liquid heater with fluorescent liquid, the end cover blank is placed on the upper surface of the extension plate 14 at the front position of the machine body 1, and the first motor 13 is arranged in the front. The first motor 13 will drive one of the lower rollers 11 to rotate, and during the rotation of one of the lower rollers 11, the upper surface of the conveyor belt 12 will be driven from front to back. After the end cover blank is placed in the front position of the upper surface of the conveyor belt 12, the conveyor belt 12 will drive the end cover blank at the front position of the upper surface to move backward, and the end cover blank will pass through the opening 21 at the front of the flaw detection box 2. The end cover blank is hereinafter referred to as the workpiece. In the process of passing through the opening 21 at the front of the flaw detection box 2, the workpiece will squeeze the shielding curtain 22 open and pass through the flaw detection box 2. After the opening 21 is formed, the shielding curtain 22 is lowered. The shielding curtain 22 is made of opaque elastic material, thereby ensuring a good shading effect. With the transmission of the conveyor belt 12, the workpiece will enter the inner side of the flaw detection box 2. During the transmission process of the conveyor belt 12, the second motor 42 and the third motor 33 will also work. During the rotation of the second motor 42, one of the upper rollers 4 will be driven to rotate. During the rotation of the upper roller 4, the outer wall upper sleeve 43 will be driven to rotate. One of the upper sleeves 43 will be driven to rotate the flipping belt 41. The lower surface of the flipping belt 41 is driven from back to front. The third motor 33 will drive the screw 31 to rotate. During the rotation of the screw 31, the dial plate 5 will be driven to slide along the axial direction of the slide rod 32. Since the thread on the outer wall of the screw 31 is bidirectional, During the rotation of the rod 31, the paddle plate 5 will slide back and forth along the axial direction of the slide rod 32. In addition, since the end of the paddle plate 5 is inserted into the annular groove 44 of the outer wall of the corresponding upper sleeve 43, the paddle plate 5 will drive the upper sleeve 43 to move back and forth along the axial direction of the upper roller 4 during the back and forth movement in the width direction of the conveyor belt 12. The upper sleeve 43 will drive the slider 46 to slide along the slide groove 45 on the outer wall of the upper roller 4. The upper sleeve 43 will drive the flipping belt 41 to move back and forth along the axial direction of the upper roller 4. The distance between the lower surface of the flipping belt 41 and the upper surface of the conveyor belt 12 is adapted to the specifications of the workpiece. After the conveyor belt 12 drives the workpiece to the bottom of the flipping belt 41, the lower surface of the flipping belt 41 is transmitted from back to front in conjunction with the upper surface of the conveyor belt 12 from front to back, so that the workpiece is moved back and forth between the flipping belt 41 and the conveyor belt 12. The gaps between the conveyor belts 12 are rubbed, and the workpieces are turned over after being rubbed. Since the turning belt 41 moves back and forth along the axial direction of the upper roller 4, the turning belt 41 will move away after turning over the workpiece on the upper surface of the conveyor belt 12, so that the turned-over workpiece is exposed. The turning belt 41 moving back and forth along the axial direction of the upper roller 4 will not affect the observation of the flaw detection camera 23, thereby improving the precision and accuracy of flaw detection. In addition, during the back-and-forth left and right movement of the turning belt 41, the accumulated workpieces can be broken up and spread out, avoiding the accumulation of workpieces and causing the line of sight of the flaw detection camera 23 to be blocked, so that the accuracy of flaw detection is further improved. Under the irradiation of ultraviolet rays, if there are defects on the surface of the workpiece, they will appear and be captured by the flaw detection camera 23.After the workpiece is inspected, it will be moved out of the opening 21 of the inspection box 2 at the rear position along with the transmission of the conveyor belt 12;

[0037] The present invention realizes that the workpiece in the flaw detection box 2 is turned over by driving the lower surface of the turning belt 41 in opposite directions to the upper surface of the conveyor belt 12 and cooperating with the turning belt 41 to move back and forth in the left and right directions, thereby ensuring more accurate flaw detection of the workpiece.

[0038] Embodiment 2: The inner top of the flaw detection box 2 is fixedly connected to the electric push rod 25; the lower end of the electric push rod 25 is fixedly connected to the corresponding support plate 3.

[0039] In this embodiment, a retaining groove 15 is provided on the upper surface of the body 1; the retaining groove 15 is located on the inner side of the flaw detection box 2; the two retaining grooves 15 are located on both sides of the conveyor belt 12 and are arranged close to the edge of the conveyor belt 12; the retaining groove 15 is connected to the baffle 16 by sliding up and down; the baffle 16 is connected to the bottom of the retaining groove 15 by a first spring 17.

[0040] The two supporting plates 3 will move downwards as the electric push rod 25 extends, causing the turning belt 41 to move downwards, so that the turning belt 41 can turn over workpieces of different specifications, ensuring the accuracy of the flaw detection equipment on the workpiece while improving the flaw detection range of the flaw detection equipment; the baffle 16 will be pressed against the lower position of the outer wall of the upper roller 4 under the action of the first spring 17, and the baffle 16 can block and limit the two edges of the conveyor belt 12 inside the flaw detection box 2, thereby preventing the workpiece from moving out of the upper surface of the conveyor belt 12 when the turning belt 41 is moved left and right, so that the conveyor belt 12 can drive the workpiece to complete the flaw detection smoothly, thereby improving the flaw detection stability of the flaw detection equipment.

[0041] Example 3: A compensation groove 51 is provided on the lower surface of the shift plate 5; a compensation block 52 is slidably connected in the compensation groove 51; the upper end of the compensation block 52 is connected to the bottom of the compensation groove 51 through a second spring 53; the lower end of the compensation block 52 is pressed against the inner surface of the flip belt 41 under the action of the elastic force of the second spring 53.

[0042] In this embodiment, the elastic force of the second spring 53 is reduced as it approaches the edge position in the width direction of the flip belt 41; in the width direction of the flip belt 41, the distance between the lower surface of the flip belt 41 and the lower surface of the shift plate 5 decreases as it approaches the edge position.

[0043] In this embodiment, the cross section of the dial plate 5 is an inverted isosceles trapezoid; the lower surface of the dial plate 5 is lower than the position of the upper sleeve 43 in the vertical direction.

[0044] In this embodiment, a tensioning groove 37 is provided axially through the two support plates 3 along the upper roller 4; a tensioning block 34 is slidably connected in the tensioning groove 37; the lower surface of the tensioning block 34 and the lower end of the tensioning groove 37 are connected by a third spring 35; a tensioning roller 36 is rotatably connected between the two tensioning blocks 34; the tensioning roller 36 is in contact with the upper position of the inner wall of the flipping belt 41.

[0045] Since the lower surface of the shift plate 5 is lower than the position of the upper sleeve 43 in the vertical direction, the lower surface of the turning belt 41 is stretched downward, and the lower surface of the turning belt 41 is stretched to form a working surface and two transition surfaces. The two transition surfaces are connected to the working surface in the front-to-back direction, and the two transition surfaces form an inverted eight-shaped shape. The setting of the two transition surfaces can transition the workpieces, so that the workpieces on the upper surface of the conveyor belt 12 can smoothly enter the working surface along the transition surface, avoiding jamming and improving the working stability of the turning belt 41; the turning belt 41 can fall on top of multiple workpieces at the same time. In order to ensure the turning effect of the workpieces, the turning belt 41 is A compensation block 52 is provided on the inner side, and the compensation block 52 is pressed against the inner wall of the turning belt 41 under the elastic force of the second spring 53. Under the elastic force of the second spring 53, the compensation block 52 is pressed against the upper surface of different workpieces through the lower surface of the turning belt 41, so that the workpiece directly below the turning belt 41 can be in contact as much as possible. In this way, the workpiece is fully turned over under the transmission of the turning belt 41, reducing the situation of missed turning of the workpiece, so that the accuracy of workpiece flaw detection is further improved; in the process of the turning belt 41 moving back and forth along the axial direction of the upper roller 4, the turning belt 41 needs to transition to the top of the workpiece at different positions. In order to make the turning belt 41 The transition of the dough belt 41 in the left and right directions is smoother, and the elastic force of the second spring 53 is limited to be smaller near the edge of the flip belt 41, so that the amplitude of the push-out of the lower surface of the flip belt 41 will also be smaller. In this way, when the middle position of the flip belt 41 is stretched compared with the edge position, the edge position of the lower surface of the flip belt 41 is tilted upward compared with the middle position, so that the flip belt 41 can smoothly pass over the workpiece during the axial movement along the upper roller 4, reducing the jamming situation and improving the working stability of the flaw detection equipment; in addition, in order to ensure the transmission effect of the flip belt 41 and avoid the influence of slack on the transmission, the support plate 3 is provided. A tensioning groove 37 is provided on the top, and a tensioning block 34 is slidably connected in the tensioning groove 37. The third spring 35 will push the tensioning block 34 to slide along the tensioning groove 37. The tensioning block 34 moves upward along the tensioning groove 37 under the push of the third spring 35. The tensioning block 34 will drive the tensioning roller 36 to move upward. The tensioning roller 36 is located on the inner side of the flipping belt 41, so that the tensioning roller 36 can prop up the upper position of the inner side of the flipping belt 41. In this way, when the lower surface of the flipping belt 41 is loose, the upper position of the flipping belt 41 can be tightened by the tensioning roller 36, so that the flipping belt 41 is not easy to loosen, thereby ensuring a good transmission effect of the flipping belt 41.

[0046] Example 4: The inner wall of the conveyor belt 12 is provided with an anti-bending plate 6; the upper surface of the anti-bending plate 6 is rollingly connected to the rolling roller 61; the upper surface of the anti-bending plate 6 is in contact with the upper position of the inner wall of the conveyor belt 12; the outer surface of the conveyor belt 12 is evenly provided with anti-slip protrusions 18.

[0047] The upper surface of the conveyor belt 12 is provided with an anti-bending plate 6 on the inner wall thereof, so as to provide support for the upper surface of the conveyor belt 12. In order to reduce the friction between the anti-bending plate 6 and the upper part of the conveyor belt 12, a rolling roller 61 can be embedded in the upper surface of the anti-bending plate 6 and connected in a rolling manner, so that the conveyor belt 12 can be transmitted on the rolling roller 61, and a gap approximately inverted triangle is formed between adjacent rolling rollers 61. The gap is called a recessed area. Under the setting of the recessed area, the upper surface of the conveyor belt 12 will be compressed and recessed, thereby increasing the friction between the upper surface of the conveyor belt 12 and the workpiece, and at the same time, it also enables the workpiece to avoid during the rolling and flipping process, causing the workpiece to be rolled and flipped more smoothly; in addition, the setting of the protrusion 18 will further increase the friction between the upper surface of the conveyor belt 12 and the workpiece, making the workpiece less likely to slip during the flipping process and rolling better. In addition, during the axial movement of the flipping belt 41 along the upper roller 4, the workpiece is also less likely to slip, so that the workpiece can be smoothly exposed from under the flipping belt 41 as the flipping belt 41 moves left and right.

[0048] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A flaw detection device for liquid heater processing, comprising a body and lower rollers rotatably connected to the body; two lower rollers rotatably connected to a conveyor belt; one of the lower rollers is driven by a first motor; the front and rear ends of the body are fixedly connected to an extension plate; the top of the body is fixedly connected to a flaw detection box; the flaw detection box has openings on both the front and rear sides; a shielding curtain is fixedly connected to the opening; a flaw detection camera and an ultraviolet lamp are fixedly connected to the top of the flaw detection box; and the device is characterized by: A support plate is provided inside the flaw detection box and is located to the left and right of the conveyor belt; the support plate and the conveyor belt are staggered; an upper roller is rotatably connected between the two support plates; the two upper rollers are connected to a turning belt in a forward and backward direction; one of the upper rollers is driven by a second motor; the lower surface of the turning belt and the upper surface of the conveyor belt have opposite transmission directions, thereby realizing the turning over of the workpiece for flaw detection; The outer wall of the upper roller is sleeved with an upper sleeve; the outer wall of the upper sleeve is provided with an annular groove; the turning belt is transmission-connected to the annular grooves on the outer walls of the two upper sleeves; the axial length of the upper sleeve is smaller than the length of the upper roller; the turning belt and the conveyor belt are both made of elastic material; a paddle plate is provided on the inner side of the turning belt; a screw and a sliding rod are rotatably connected between the two support plates; the sliding rod is arranged near one of the upper rollers, and the screw is arranged near the upper roller at the other end; the sliding rod passes through the paddle plate and is slidably connected with the paddle plate, the screw passes through the paddle plate and is thread-drivenly connected with the paddle plate; the thread on the screw is a bidirectional thread; one end of the screw is driven by a third motor; the end of the paddle plate is stuck in the corresponding annular groove; The outer wall of the upper roller is connected to the slide groove in an axial sliding manner; the slide groove is connected to the slider in an axial sliding manner; and the slider is fixed to the inner wall of the upper sleeve.

2. The flaw detection equipment for liquid heater processing according to claim 1, characterized in that: The inner top of the flaw detection box is fixedly connected to an electric push rod; the lower end of the electric push rod is fixedly connected to a corresponding supporting plate.

3. The flaw detection equipment for liquid heater processing according to claim 2, characterized in that: A retaining groove is provided on the upper surface of the machine body; the retaining groove is located on the inner side of the flaw detection box; the two retaining grooves are located on both sides of the conveyor belt and are arranged close to the edge of the conveyor belt; the retaining groove is connected to the baffle for sliding up and down; the lower end of the baffle is connected to the bottom of the retaining groove through a first spring.

4. The flaw detection equipment for liquid heater processing according to claim 1, characterized in that: A compensation groove is provided on the lower surface of the shift plate; a compensation block is slidably connected in the compensation groove; the upper end of the compensation block is connected to the bottom of the compensation groove through a second spring; the lower end of the compensation block rests on the inner surface of the flip belt under the action of the second spring.

5. The flaw detection equipment for liquid heater processing according to claim 4, characterized in that: The elastic force of the second spring is set to decrease closer to the edge position in the width direction of the flip belt; in the width direction of the flip belt, the distance between the lower surface of the flip belt and the lower surface of the paddle decreases as it approaches the edge position.

6. The flaw detection equipment for liquid heater processing according to claim 4, characterized in that: The cross section of the paddle plate is an inverted isosceles trapezoid; the lower surface of the paddle plate is lower than the upper sleeve position in the vertical direction.

7. The flaw detection equipment for liquid heater processing according to claim 4, characterized in that: The two support plates are provided with tensioning grooves extending axially along the upper roller; a tensioning block is slidably connected in the tensioning groove; the lower surface of the tensioning block and the lower end of the tensioning groove are connected by a third spring; a tensioning roller is rotatably connected between the two tensioning blocks; the tensioning roller is in contact with the upper position of the inner wall of the flipping belt.

8. The flaw detection equipment for liquid heater processing according to claim 1, characterized in that: The inner wall of the conveyor belt is provided with an anti-bending plate; the upper surface of the anti-bending plate is rollingly connected to a rolling roller; the upper surface of the anti-bending plate is in contact with the upper position of the inner wall of the conveyor belt; the outer surface of the conveyor belt is evenly provided with anti-slip protrusions.

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