Fatigue damage detection device for beam-pumping unit

Abstract

The invention relates to the technical field of oil pumping unit detection, in particular to a fatigue damage detection device for a beam-pumping unit, which comprises an oil pumping unit, a pair of fixing blocks are arranged on a walking beam of the oil pumping unit, the bottom ends of the fixing blocks are fixedly connected with upper wheel seats, and the inner sides of the upper wheel seats are rotatably connected with driving wheels. Wherein the side wall of one upper wheel seat is provided with a driving mechanism used for driving the driving wheel to rotate, the sides, away from each other, of the fixing blocks are fixedly connected with a long frame and a short frame respectively, and the inner sides of the long frame and the short frame are slidably connected with sliding frames. Therefore, under the action that the driving mechanism drives the driving wheel to rotate, the detection device can move back and forth on the walking beam, automatic fatigue damage detection of the pumping unit walking beam is achieved, the device can be automatically fixed only by being placed on the walking beam, a worker does not need to climb to install, and the convenience performance of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pumping unit detection, in particular to a fatigue damage detection device for a beam pumping unit. Background Art

[0002] A walking beam pumping unit refers to an oil pumping unit that contains a walking beam, is reversing through a connecting rod mechanism, and is balanced by a crank weight. It is commonly known as a kowtow machine. In terms of oil production method, it is a rod-type oil production equipment. The walking beam pumping unit is one of the main types of oil pumping units currently used in oil fields. It is mainly composed of four parts: the donkey head-walking beam-connecting rod-crank mechanism, a reduction gear box, power equipment and auxiliary equipment. Its walking beam components are subjected to complex alternating stresses during long-term reciprocating motion and are prone to fatigue damage. Early detection of fatigue damage is crucial to ensuring the safe operation of the pumping unit, reducing maintenance costs and improving production efficiency.

[0003] At present, there are various methods for detecting fatigue damage of walking beams, but there are some limitations. Traditional detection methods rely on regular manual inspections, which are inefficient and easily affected by human factors, making it difficult to detect early fatigue damage in a timely manner. Although existing automated fatigue damage visual detection devices have improved detection accuracy and efficiency to a certain extent, most devices have obvious deficiencies in installation and operation.

[0004] Existing devices usually require manual intervention for installation and disassembly, and cannot be automatically installed on the walking beam and realize self-propelled detection. This not only increases the complexity and cost of detection, but also limits the frequency and range of detection. In some high-altitude or difficult-to-reach parts of the walking beam, manual installation of detection devices poses safety risks, and the detection process is cumbersome and time-consuming.

[0005] Therefore, a fatigue damage detection device for a beam pumping unit is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a fatigue damage detection device for a beam pumping unit.

[0007] The top end face of said sliding arm is fixedly provided with a toothed connecting strip which is cooperatively connected with said toothed connecting gear.

[0008] In the above technical solution, further, a plurality of lower rollers are rotatably connected to the inner side of the lower wheel seat, and the round rod is inserted into the inner side of the straight groove.

[0009] In the above technical solution, further, the detection mechanism includes an upper industrial camera, a middle industrial camera and a lower industrial camera, and the upper industrial cameras and the middle industrial cameras are each provided in two pairs, each pair of the upper industrial cameras is fixedly connected to both sides of the fixed block, and each pair of the middle industrial cameras is respectively fixedly connected to both sides of the long frame and the short frame, a lower rod is provided at the bottom end of the long frame, a groove is provided at the bottom end of the side wall of the lower rod, and the lower industrial camera is tilted and fixedly connected to the bottom end of the groove, and the upper industrial camera, the middle industrial camera and the lower industrial camera are all electrically connected to the image processing algorithm analysis system through the controller.

[0010] In the above technical solution, further, a telescopic slot is opened at the bottom end of the long frame, the lower rod is slidably connected to the inner side of the telescopic slot, and a return spring is fixedly connected between the top end of the lower rod and the top end of the telescopic slot.

[0011] In the above technical solution, further, a top groove is formed through the side wall of the long frame relative to the position next to the telescopic groove, and right-angle frames with inclined surfaces are fixedly connected to both sides of the lower rod.

[0012] In the above technical solution, further, one of the side walls of the fixed block is provided with an adjustment groove, and the other side wall of the fixed block is fixedly connected to an adjustment block, and the adjustment block is inserted into the inner side of the adjustment groove, and a bolt is threaded through the top of one of the fixed blocks, and a plurality of limit grooves are equidistantly provided on the top of the adjustment block, and the bottom end of the bolt is inserted into the inner side of one of the limit grooves.

[0013] In the above technical solution, further, the side wall of the long frame is fixedly connected with an insertion frame, the top end of the hand-held rod is inserted into the insertion frame, and a through groove is provided on the side close to the insertion frame and the long frame, and a slide is slidably connected to the bottom end of the through groove, and three positioning blocks are fixedly connected to the side wall of the slide at equal intervals, and three positioning grooves are provided on the side wall of the hand-held rod at equal intervals, and an L-shaped plate is longitudinally slidably connected to the inner side of the through groove, and a right-angle block with an inclined surface is fixedly connected to the side wall of the slide. The bottom end of the L-shaped plate is tilted, and the inclined surface of the bottom end of the L-shaped plate contacts the inclined surface of the right-angle block, and the side end of the L-shaped plate extends to the position above the sliding frame.

[0014] In the above technical solution, further, the bottom end of the hand-held rod is fixedly connected to a hand-held block, the bottom end of the through slot is fixedly connected to a fixed plate, a number of upper springs are fixedly connected between the fixed plate and the side wall of the skateboard, and a number of lower springs are fixedly connected between the top end of the through slot and the top end of the L-shaped plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can automatically fix and clamp the detection device on the walking beam of the walking beam pumping unit through the arrangement of the upper wheel seat, the lower wheel seat, the hand-held rod and the electric telescopic cylinder. As a result, the detection device can be moved back and forth on the walking beam under the action of the driving mechanism driving the driving wheel to rotate, thereby realizing automatic fatigue damage detection of the walking beam of the pumping unit. In addition, the device can be automatically fixed by simply placing it on the walking beam, without the need for workers to climb up to install it, which greatly improves the convenience of the device.

[0016] 2. The present invention can adjust the size of the detection device according to the different widths of the walking beam of the oil pumping unit by setting structures such as the adjustment block, bolts and limit grooves, and can then be automatically clamped and installed on the walking beams of different sizes, thereby improving the universal performance of the device.

[0017] 3. The present invention, through the arrangement of the positioning block, the right-angle block and the L-shaped plate and other structures, can automatically release the limit of the hand-held rod while the detection device is locked on the walking beam, thereby facilitating the worker to quickly pull out the hand-held rod to avoid affecting the normal movement of the subsequent machine. At the same time, when the detection device is released from the upper limit position on the walking beam, the hand-held rod can be locked on the insertion frame, facilitating the subsequent worker to take out the machine, thereby greatly improving the convenience performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of the oil pumping unit and the detection device of the present invention; Figure 2 The appended Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 It is a schematic diagram of the full-cut side perspective structure of the walking beam and the detection device of the present invention; Figure 4 The appended Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 5 This is a bottom-up schematic diagram of the three-dimensional structure of the walking beam and the detection device of the present invention; Figure 6 The appended Figure 5 A schematic diagram of the partially enlarged structure at point C in the middle; Figure 7 This is a schematic diagram of the separated three-dimensional structure of the detection device of the present invention; Figure 8 This is a schematic diagram of the overall appearance of the sliding frame and the hand-held rod of the present invention; Figure 9 It is a schematic diagram of the overall appearance structure of the lower rod of the present invention.

[0019] In the figure: 1. Pumping unit; 2. Fixing block; 3. Upper wheel seat; 4. Driving wheel; 5. Driving mechanism; 6. Long frame; 7. Short frame; 8. Sliding frame; 9. Lower wheel seat; 10. Round rod; 11. Straight slot; 12. Oblique slot; 13. Electric telescopic cylinder; 14. Upper industrial camera; 15. Hand-held rod; 16. Lower roller; 17. Middle industrial camera; 18. Lower industrial camera; 19. Lower rod; 20. Return spring; 21. Right-angle frame; 22. Adjusting block; 23. Bolt; 24. Limiting slot; 25. Top slot; 26. Inserting frame; 27. Slide plate; 28. Positioning block; 29. Positioning slot; 30. Fixing plate; 31. Upper spring; 32. L-shaped plate; 33. Right-angle block; 34. Hand-held block; 35. Lower spring. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] In actual use, it was found that existing devices usually require manual intervention for installation and disassembly, and cannot be automatically installed on the walking beam and realize self-propelled detection. This not only increases the complexity and cost of detection, but also limits the frequency and range of detection. In some high-altitude or difficult-to-reach parts of the walking beam, manual installation of the detection device poses safety risks, and the detection process is cumbersome and time-consuming. In order to solve the above problems, the following structure is specially invented.

[0023] like Figures 1-9The fatigue damage detection device for a walking beam pumping unit shown in the figure comprises an oil pumping unit 1. A pair of fixed blocks 2 are provided on the walking beam of the oil pumping unit 1. The bottom ends of the fixed blocks 2 are fixedly connected to upper wheel seats 3. The inner sides of the upper wheel seats 3 are rotatably connected to drive wheels 4. A driving mechanism 5 for driving the drive wheel 4 to rotate is provided on the side wall of one of the upper wheel seats 3. The driving mechanism 5 is mainly composed of a motor, a power supply and a control system. It can drive the detection device to move on the walking beam alone. It is a mature technology in the prior art and will not be described in detail here. A long frame 6 and a short frame 7 are fixedly connected to the side away from the fixed block 2. By setting the short frame 7, the other side of the detection device can be relative to the long frame. The frame 6 is shortened to facilitate workers to lift the detection device and place it on the walking beam, thereby improving the convenience of the device during installation. The inner sides of the long frame 6 and the short frame 7 are slidably connected to the sliding frame 8, and the lower ends of the sliding frames 8 are horizontally slidably connected to the lower wheel seats 9. Round rods 10 are fixedly connected on both sides of the lower wheel seats 9. Straight grooves 11 are provided on both sides of the long frame 6 and the short frame 7, and oblique grooves 12 are provided at the bottom ends of the straight grooves 11. The tops of the long frame 6 and the short frame 7 are fixedly connected to electric telescopic cylinders 13. The output ends of the electric telescopic cylinders 13 pass through the inner sides of the long frame 6 and the short frame 7 and are fixedly connected to the top of the sliding frame 8. A hand-held rod 15 is provided next to the long frame 6, and a detection mechanism for detecting cracks in the walking beam is also provided. The inner side of the lower wheel seat 9 is rotatably connected to a plurality of lower rollers 16. Through the arrangement of the lower rollers 16, the walking beam can be clamped between the driving wheel 4 and the lower rollers 16 to ensure the smooth movement of the detection device on the walking beam. The round rod 10 is inserted into the inner side of the straight groove 11. The detection mechanism includes an upper industrial camera 14, a middle industrial camera 17 and a lower industrial camera 18. Two pairs of upper industrial cameras 14 and middle industrial cameras 17 are provided. Each pair of upper industrial cameras 14 is fixedly connected to both sides of the fixed block 2. Each pair of middle industrial cameras 17 is fixedly connected to both sides of the long frame 6 and the short frame 7 respectively. A lower rod 19 is provided at the bottom end of the long frame 6. A groove is provided at the bottom end of the side wall of the lower rod 19. The lower industrial camera 18 is fixedly connected to the bottom end of the groove at an angle. The upper industrial camera 14, the middle industrial camera 17 and the lower industrial camera 18 are all electrically connected to the image processing algorithm analysis system through the controller; When fatigue damage detection is performed on the walking beam of the pumping unit 1, the inspector first climbs onto the inspection platform with the detection device through the climbing frame of the pumping unit 1, then the inspector lifts the detection device with the bottom end of the handheld rod 15, and then places the detection device on the walking beam of the pumping unit 1, and places the driving wheel 4 on the top of the walking beam, while the long frame 6 and the short frame 7 are located on both sides of the walking beam, and then the electric telescopic cylinder 13 can be controlled to start and drive the sliding frame 8 to move upward, and at the same time drive the lower wheel seat 9 to slide upward, and drive the round rod 10 to slide upward in the inclined groove 12. As the lower wheel seat 9 continues to move upward, it will be in the inclined groove 12. Under the extrusion of the inclined surface, the round rod 10 and the lower wheel seat 9 are pushed to move toward the side of the walking beam, thereby extending the lower wheel seat 9 out of the long frame 6 and the short frame 7. Then, the round rod 10 moves out of the inclined slot 12 and slides into the straight slot 11. Then, under the continued drive of the electric telescopic cylinder 13, the sliding frame 8, the lower wheel seat 9 and the lower roller 16 are pulled upward, so that the outer wall of the lower roller 16 is pressed against the inner top of the I-shaped walking beam, so that the device is clamped on the I-shaped walking beam through the driving wheel 4 and the lower roller 16 (it should be noted here that the reinforcing ribs on the walking beam are staggered with the lower wheel seat 9 and will not affect the normal movement of the machine); Then the driving mechanism 5 can be controlled to start driving the driving wheel 4 to rotate, thereby driving the detection device to move on the walking beam, and at the same time, the upper industrial camera 14 is turned on to take pictures of the top of the walking beam, and the middle industrial camera 17 is turned on to take pictures of the two sides of the walking beam, and the lower industrial camera 18 is turned on to take pictures of the bottom of the walking beam. The pictures taken are then transmitted to the image processing algorithm analysis system for analysis. If a crack is detected, an alarm will be issued to facilitate the detection personnel to know. Finally, after the detection is completed, the electric telescopic cylinder 13 is controlled to move down and reset, and the above operation is repeated in reverse to release the lock, and the lower wheel seat 9 is put into the long frame 6 and the short frame 7, and then the machine can be taken away.

[0024] In summary, through the design of the above structure, the detection device can be automatically fixed and clamped on the walking beam of the walking beam pumping unit 1, so that under the action of the driving mechanism 5 driving the driving wheel 4 to rotate, the detection device can move back and forth on the walking beam, thereby realizing automatic fatigue damage detection of the walking beam of the pumping unit 1, and the machine only needs to be placed on the walking beam to be automatically fixed, without the need for workers to climb up to install it, which greatly improves the convenience of the device.

[0025] On the basis of the above embodiment, it was found during use that since the middle part of the walking beam serves as the hinge point of the walking beam pumping unit 1, the bottom end of the middle part of the walking beam will hinder the normal movement of the long frame 6, thereby affecting the comprehensive detection of the walking beam. In order to solve the above problem, the above structure was further improved.

[0026] A telescopic slot is provided at the bottom of the long frame 6, a lower rod 19 is slidably connected to the inner side of the telescopic slot, and a return spring 20 is fixedly connected between the top of the lower rod 19 and the top of the telescopic slot; A top groove 25 is provided through the side wall of the long frame 6 relative to the position next to the telescopic slot. The top groove 25 avoids obstruction to the normal extension and contraction of the right-angle frame 21. The right-angle frame 21 with an inclined surface is fixedly connected on both sides of the lower rod 19. When the driving detection mechanism moves to the side of the rocker arm hinge block, the inclined surface of the right-angle frame 21 will be squeezed by the arc surface of the hinge block, and then the right-angle frame 21 will be squeezed to gradually move upward, while driving the lower rod 19 to slide in the telescopic slot and compressing the reset spring 20, thereby driving the lower industrial camera 18 to move upward to avoid being obstructed by the hinge block.

[0027] In summary, through the design of the above structure, when the lower industrial camera 18 passes the hinge point of the walking beam, the inclined surface of the right-angle frame 21 can be squeezed by the arc surface of the hinge block by driving the movement of the detection mechanism, thereby squeezing the right-angle frame 21 to gradually move upward, and at the same time driving the lower rod 19 to slide in the telescopic groove and compressing the reset spring 20, thereby driving the lower industrial camera 18 to move upward, avoiding being hindered by the hinge block and affecting the normal movement of the detection device. It should be noted here that since the lower industrial camera 18 detects the bottom end of the walking beam, retracting the lower industrial camera 18 at this time will affect the detection of the bottom end of the walking beam; However, from a structural design perspective, the walking beam hinge is a key location where the walking beam is connected to other components of the pumping unit 1 (such as the crossbeam). Its main function is to bear and transmit large concentrated loads and realize the reciprocating swing of the walking beam. At this hinge, due to the presence of components such as sleeves and bearings, these components can usually effectively disperse and bear the load, making the stress distribution at the bottom end of the walking beam hinge relatively complex and uneven. However, this is not a high-incidence area for fatigue damage. Fatigue damage is more likely to occur at stress concentration locations such as the curved section of the walking beam and the connecting welds. From the perspective of the operability and necessity of detection, the bottom end of the walking beam hinge point is usually located inside the complex structure of the oil pumping unit 1, and is blocked by many other components around it, which makes the installation and operation of the detection equipment at this location extremely inconvenient. At the same time, due to the special location of this location, even if there is slight fatigue damage, it is difficult to accurately identify and evaluate it through conventional visual inspection methods. Therefore, in order to improve the efficiency and pertinence of the inspection, it is more reasonable to focus the inspection on other vulnerable parts of the walking beam. In summary, based on the structural characteristics of the walking beam, the law of damage occurrence and the feasibility of actual detection operations, the bottom end of the walking beam hinge point is usually not used as a key inspection area during fatigue damage detection.

[0028] Based on the above embodiment, it was found during use that if the spacing between the fixed blocks 2 is fixed, the detection device can only be used for slotted beams of the same specification and size, which cannot meet the user's needs. In order to solve the above problem, the above structure was further improved.

[0029] An adjustment slot is provided on the side wall of one of the fixing blocks 2, and an adjustment block 22 is fixedly connected to the side wall of the other fixing block 2. The adjustment block 22 is inserted into the inner side of the adjustment slot. A bolt 23 is threadedly connected to the top of one of the fixing blocks 2. A plurality of limiting slots 24 are equidistantly provided on the top of the adjusting block 22, and the bottom end of the bolt 23 is inserted into the inner side of one of the limiting slots 24. When inspecting walking beams of different widths and needing to adjust the spacing between the fixed blocks 2, first use a tool to unscrew the bolt 23 out of the limit slot 24, thereby releasing the sliding restriction of the fixed block 2 on the adjustment block 22, and then pull the fixed block 2 and the short frame 7 to move and adjust the spacing between the fixed blocks 2. After the adjustment is completed, use a tool to reversely screw the bottom end of the bolt 23 into the corresponding limit slot 24 to fix the spacing between the fixed blocks 2 and complete the spacing adjustment of the detection device.

[0030] In summary, through the design of the above structure, the size of the detection device can be adjusted according to the different widths of the walking beam of the oil pumping unit 1, and then it can be automatically clamped and installed on the walking beams of different sizes, thereby improving the universal performance of the device.

[0031] On the basis of the above embodiment, it was found during use that since the detection device is placed on the walking beam by a worker holding a handheld rod 15, if the handheld rod 15 is not removed, it will affect the normal movement of the subsequent detection device on the walking beam. In order to solve the above problem, the above structure was further improved.

[0032] The side wall of the long frame 6 is fixedly connected with an insertion frame 26, and the top of the hand-held rod 15 is inserted into the insertion frame 26. A through slot is provided on the side close to the insertion frame 26 and the long frame 6. A slide plate 27 is slidably connected to the bottom of the through slot. Three positioning blocks 28 are fixedly connected to the side wall of the slide plate 27 at equal intervals. Three positioning slots 29 are equidistantly provided on the side wall of the hand-held rod 15. An L-shaped plate 32 is longitudinally slidably connected to the inner side of the through slot. A right-angle block 33 with an inclined surface is fixedly connected to the side wall of the slide plate 27. The bottom end of the L-shaped plate 32 is tilted, and the inclined surface of the bottom end of the L-shaped plate 32 contacts the inclined surface of the right-angle block 33. The side end of the L-shaped plate 32 extends to the position above the sliding frame 8; The bottom end of the hand-held rod 15 is fixedly connected to a hand-held block 34. The setting of the hand-held block 34 makes it easy for the inspector to hold the hand-held rod 15, lift the machine and place it on the walking beam. The bottom end of the through slot is fixedly connected to a fixed plate 30. Several upper springs 31 are fixedly connected between the fixed plate 30 and the side wall of the slide plate 27. Several lower springs 35 are fixedly connected between the top end of the through slot and the top end of the L-shaped plate 32. In the process of controlling the electric telescopic cylinder 13 to start and lock the machine on the walking beam, the electric telescopic cylinder 13 drives the sliding frame 8 to move upward. When the sliding frame 8 moves to the bottom of the L-shaped plate 32, it will drive the L-shaped plate 32 to move upward together and gradually compress the lower spring 35, thereby gradually releasing the squeezing of the right-angle block 33. Subsequently, under the elastic force of the upper spring 31, the slide plate 27 is pulled to slide in the through groove, and at the same time, the positioning block 28 is pulled out from the positioning groove 29, thereby automatically releasing the locking of the hand-held rod 15. After the machine is locked on the walking beam, the inspection personnel can pull out the hand-held rod 15 to avoid affecting the normal movement of the machine on the walking beam. Finally, after the inspection is completed, the lock of the machine on the walking beam is released. Before that, the hand-held rod 15 is inserted into the insertion frame 26 (when inserting, the positioning slot 29 side needs to be inserted toward the positioning block 28 side), and the electric telescopic cylinder 13 can be controlled to move down and reset. During this process, the downward movement of the sliding frame 8 will gradually release the squeezing of the L-shaped plate 32, and then the L-shaped plate 32 is pushed downward under the elastic force of the lower spring 35, and then the inclined surface of the L-shaped plate 32 gradually squeezes the inclined surface of the right-angle block 33, pushing the right-angle block 33 and the slide plate 27 to move, and stretching the upper spring 31 (it should be noted here that the elastic force of the lower spring 35 is greater than the elastic force of the upper spring 31), so that the positioning block 28 is inserted into the corresponding positioning slot 29, thereby locking and fixing the hand-held rod 15.

[0033] To sum up, through the design of the above structure, the limit of the hand-held rod 15 can be automatically released while the detection device is locked on the rocker, so that the worker can quickly pull out the hand-held rod 15 to avoid affecting the normal movement of the subsequent machine. At the same time, when the upper limit of the detection device on the rocker is released, the hand-held rod 15 can be locked on the insertion frame 26, which is convenient for subsequent workers to take out the machine, greatly improving the convenience of the device.

[0034] The basic principles, main features and advantages of the present invention are shown and described above.

[0035] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A fatigue damage detection device for a beam pumping unit, comprising a pumping unit (1), characterized in that: A pair of fixed blocks (2) are provided on the walking beam of the pumping unit (1), the bottom ends of the fixed blocks (2) are fixedly connected to the upper wheel seat (3), the inner sides of the upper wheel seat (3) are rotatably connected to the driving wheel (4), one side wall of the upper wheel seat (3) is provided with a driving mechanism (5) for driving the driving wheel (4) to rotate, the fixed blocks (2) are fixedly connected to the long frame (6) and the short frame (7) on the side away from each other, the inner sides of the long frame (6) and the short frame (7) are slidably connected to the sliding frame (8), and the inner bottom ends of the sliding frames (8) are transversely slidably connected to the lower wheel seat (9), both sides of the lower wheel seat (9) are fixedly connected with round rods (10), both sides of the long frame (6) and the short frame (7) are penetrated with straight grooves (11), the bottom ends of the straight grooves (11) are provided with oblique grooves (12), the top ends of the long frame (6) and the short frame (7) are fixedly connected with electric telescopic cylinders (13), the output ends of the electric telescopic cylinders (13) pass through the inner sides of the long frame (6) and the short frame (7) and are fixedly connected to the top end of the sliding frame (8), a hand-held rod (15) is provided next to the long frame (6), and a detection mechanism for detecting cracks in the walking beam is also provided.

2. The fatigue damage detection device for a beam pumping unit according to claim 1, characterized in that: The inner side of the lower wheel seat (9) is rotatably connected to a plurality of lower rollers (16), and the round rod (10) is inserted into the inner side of the straight groove (11).

3. The fatigue damage detection device for a beam pumping unit according to claim 1, characterized in that: The detection mechanism includes an upper industrial camera (14), a middle industrial camera (17) and a lower industrial camera (18), and two pairs of the upper industrial camera (14) and the middle industrial camera (17) are provided. Each pair of the upper industrial cameras (14) is fixedly connected to both sides of the fixed block (2), and each pair of the middle industrial cameras (17) is fixedly connected to both sides of the long frame (6) and the short frame (7). A lower rod (19) is provided at the bottom end of the long frame (6), and a groove is provided at the bottom end of the side wall of the lower rod (19). The lower industrial camera (18) is fixedly connected to the bottom end of the groove at an angle. The upper industrial camera (14), the middle industrial camera (17) and the lower industrial camera (18) are all electrically connected to the image processing algorithm analysis system through a controller.

4. The fatigue damage detection device for a beam pumping unit according to claim 3, characterized in that: A telescopic slot is provided at the bottom end of the long frame (6), the lower rod (19) is slidably connected to the inner side of the telescopic slot, and a return spring (20) is fixedly connected between the top end of the lower rod (19) and the top end of the telescopic slot.

5. The fatigue damage detection device for a beam pumping unit according to claim 4, characterized in that: A top groove (25) is provided through the side wall of the long frame (6) at a position adjacent to the telescopic groove, and right-angle frames (21) with inclined surfaces are fixedly connected to both sides of the lower rod (19).

6. The fatigue damage detection device for a beam pumping unit according to claim 1, characterized in that: An adjusting groove is provided on the side wall of one of the fixing blocks (2), and an adjusting block (22) is fixedly connected to the side wall of the other fixing block (2), and the adjusting block (22) is inserted into the inner side of the adjusting groove. A bolt (23) is threadedly connected through the top of one of the fixing blocks (2), and a plurality of limiting grooves (24) are equidistantly provided on the top of the adjusting block (22), and the bottom end of the bolt (23) is inserted into the inner side of one of the limiting grooves (24).

7. The fatigue damage detection device for a beam pumping unit according to claim 1, characterized in that: The side wall of the long frame (6) is fixedly connected to an insertion frame (26), the top of the hand-held rod (15) is inserted into the insertion frame (26), and a through slot is provided on the side of the insertion frame (26) and the long frame (6) close to each other, and a slide plate (27) is slidably connected to the bottom end of the through slot, and three positioning blocks (28) are fixedly connected to the side wall of the slide plate (27) at equal intervals, and three positioning slots (29) are equidistantly provided on the side wall of the hand-held rod (15), and an L-shaped plate (32) is longitudinally slidably connected to the inner side of the through slot, and a right-angle block (33) with an inclined surface is fixedly connected to the side wall of the slide plate (27), and the bottom end of the L-shaped plate (32) is inclined, and the inclined surface of the bottom end of the L-shaped plate (32) contacts the inclined surface of the right-angle block (33), and the side end of the L-shaped plate (32) extends to the upper position of the sliding frame (8).

8. The fatigue damage detection device for a beam pumping unit according to claim 7, characterized in that: The bottom end of the hand-held rod (15) is fixedly connected to a hand-held block (34), the bottom end of the through slot is fixedly connected to a fixed plate (30), a plurality of upper springs (31) are fixedly connected between the fixed plate (30) and the side wall of the slide plate (27), and a plurality of lower springs (35) are fixedly connected between the top end of the through slot and the top end of the L-shaped plate (32).

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