A kind of hose swivel fatigue life simulation test device

Abstract

This invention discloses a fatigue life simulation test device for loading arm rotary joints, belonging to the technical field of simulation test devices. It includes a test bench, an electric slide rail, an electric sliding plate (first type), a support frame, a fixed shell, an electric sliding plate (second type), and a loading arm rotary joint. The electric slide rail is fixedly connected to the top of the test bench. The electric sliding plate (first type) is fixedly installed on the moving end of the electric slide rail. The fixed shell is slidably embedded in the support frame. The fatigue life simulation test device for loading arm rotary joints also includes an anti-fall-off mechanism for fixing the loading arm rotary joint during testing. This mechanism is located on the outer wall of the fixed shell. During testing, when the loading arm rotary joint is placed inside the support frame, it presses down on the fixed shell. The fixed shell then drives a locking plate to cooperate with pulleys for limiting the position, ensuring the safety and validity of the test data, avoiding stress distortion caused by shaking, improving the overall stability of the equipment, and making the equipment testing more stable.

Description

Technical Field

[0001] This invention relates to the field of simulation testing equipment technology, specifically to a fatigue life simulation testing device for a rotary joint of an arm. Background Technology

[0002] The rotary joint of the loading arm is a core component for loading and unloading petrochemical fluids. It needs to work reliably for a long time under conditions of frequent rotation, oscillation and coupling of medium pressure and temperature. Its fatigue life directly determines the safety and availability of the loading and unloading system.

[0003] Patent publication number CN118549102A involves a fixed base plate on which an angle adjustment mechanism and a rotary joint adjustment mechanism are fixedly connected. A reciprocating drive platform mechanism is rotatably connected to the angle adjustment mechanism. A motor is fixed on a mounting plate, and the motor shaft passes through the mounting plate and is connected to a rotary disk via a bearing and fixed by a locking bushing. A cylinder is fixed on the rotary disk, and a bearing is installed on the cylinder. A guide rod is connected to the mounting adapter, and a guide groove is opened on the guide rod. The bearing contacts the guide groove, converting the cyclic rotation of the rotary disk into angular reciprocating motion. The mounting adapter is connected to the mounting plate via the bearing. This device can not only realize multi-angle installation fatigue testing of spatial motion rotary joints in a simulated real environment, but also realize precise rotation angle fatigue testing of spatial motion rotary joints, with high testing accuracy and good applicability.

[0004] The aforementioned patent describes a device capable of performing multi-angle fatigue testing of a space motion rotary joint in a simulated real-world environment. While this device achieves precise rotation angle fatigue testing of the space motion rotary joint with high accuracy and good applicability, the rotary joint of the loading arm is prone to wobbling and shifting during fixation. This significantly reduces the overall test results and makes it difficult to guarantee data accuracy. Furthermore, manual fixation of the rotating part is required before rotation, which can easily cause fixation shifts, making it difficult to guarantee rotation stability and increasing data error. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a fatigue life simulation test device for rotary joints of loading arms, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fatigue life simulation test device for a rotary joint of an arm, comprising a test platform, an electric slide rail, an electric slide plate one, a support frame, a fixed shell, an electric slide plate two, and a rotary joint of an arm. The electric slide rail is fixedly connected to the top of the test platform. The electric slide plate one is fixedly installed on the moving end of the electric slide rail. The electric slide plate two is fixedly installed on the moving end of the electric slide rail. The support frame is fixedly connected to the test platform. The fixed shell is slidably embedded in the support frame. The support frame has a placement groove inside. The fixed shell has a placement groove inside. The rotary joint of the arm is disposed inside the fixed shell.

[0007] The fatigue life simulation test device for the rotary joint of the loading arm also includes:

[0008] An anti-detachment mechanism for fixing the installation during the inspection of the rotary joint of the loading arm is installed on the outer wall of the fixed shell;

[0009] The anti-fall-off mechanism includes a limiting rod, which is fixedly connected to the outer wall of the support frame. An L-shaped rod is slidably embedded in the circumferential surface of the limiting rod, and a spring is sleeved on the circumferential surface of the limiting rod. A pulley is installed inside the L-shaped rod. A locking plate is fixedly connected to the outer wall of the fixed shell. A locking groove is opened on the outer wall of the locking plate. The circumferential surface of the pulley contacts the locking groove of the locking plate. An electric push plate is fixedly connected to the top of the electric sliding plate, and a lifting plate is fixedly connected to the output end of the electric push plate.

[0010] During testing, when the swivel joint of the loading arm is placed inside the support frame, the fixed shell is pressed down. The fixed shell will drive the clamping plate and pulley to limit the movement, ensuring the safety and validity of the test data, avoiding stress distortion caused by shaking, improving the overall stability of the equipment, and making the equipment testing more stable.

[0011] A protective mechanism for safety during fatigue testing of the rotary joint of the loading arm is installed on the top of the test bench.

[0012] An anti-deviation mechanism for preventing the rotary joint of the loading arm from shaking and shifting during testing is installed on the outer wall of the fixed housing.

[0013] The anti-fall-off mechanism also includes a fixed platform, a motor, a rotating rod, a circular plate, a support plate, a pressure rod, and a ring. The fixed platform is fixedly connected to the top of the electric sliding plate two, the motor is fixedly connected to the top of the electric sliding plate two, the rotating rod is fixedly connected to the output end of the motor, the circumferential surface of the rotating rod is rotatably connected to the inside of the fixed platform, the circular plate is fixedly connected to the end of the rotating rod away from the motor, the support plate is slidably embedded in the inside of the circular plate by a spring, the pressure rod is slidably embedded in the inside of the circular plate by a spring, and the ring is fixedly connected to the side of the pressure rod away from the circular plate.

[0014] The outer wall of the lifting plate contacts the bottom of the swivel joint of the loading arm, the outer wall of the clamping plate contacts the outer wall of the support frame, the bottom of the clamping plate has an inclined surface, the L-shaped rod contacts the outer wall of the support frame, the side of the support plate near the pressure rod has an inclined surface, the side of the pressure rod away from the ring has an inclined surface, the inclined surface of the support plate contacts the inclined surface of the pressure rod, and the outer wall of the support plate is provided with a rubber plate.

[0015] During the rotation test, the rotating rod drives the circular plate to move, and the circular plate drives the support plate to move to both sides. The support plate will increase the friction between the outer rubber plate and the inner wall of the loading arm rotary joint. At this time, the rotation of the support plate will drive the rotation part of the loading arm rotary joint to rotate through the rubber plate. This avoids experimental instability caused by human operation error, ensures the consistency between fatigue damage and actual service, and improves the overall stability of the equipment.

[0016] The protective mechanism includes a limit plate, a positioning plate, a spiral rod, an annular plate, and a sliding rod. The limit plate is fixedly connected to the outer wall of the support frame, the positioning plate is rotatably mounted on the limit plate, the spiral rod is slidably embedded in the inner wall of the positioning plate, the annular plate is fixedly connected to the circumferential surface of the spiral rod, and the sliding rod is fixedly connected to the top of the spiral rod.

[0017] During the experiment, the fixed shell drives the sliding rod downward, and the sliding rod drives the positioning plate to rotate, thereby positioning the rotary joint of the loading arm. This avoids uneven force on the sealing pair caused by the offset of the center of motion, ensures that the fatigue damage location is consistent, and eliminates the need to readjust the loading mechanism and sensor position, thus greatly shortening the changeover time.

[0018] The protective mechanism also includes an arc-shaped plate, a telescopic baffle, and a pull rod. The arc-shaped plate is fixedly connected to the test bench, the telescopic baffle is slidably embedded in the arc-shaped plate, and the pull rod is fixedly connected to the telescopic end of the telescopic baffle.

[0019] Meanwhile, to prevent the swivel joint of the loading arm from causing injury to the test personnel, the pull rod drives the telescopic baffle for protection. The swivel joint of the loading arm needs to withstand high-frequency flying debris during fatigue testing, and the telescopic baffle can block the debris, thus improving the overall stability of the equipment.

[0020] The limiting plate is slidably embedded in the circumferential surface of the spiral rod. The circumferential surface of the spiral rod has a quarter spiral groove. A movable block is fixedly connected to the inner wall of the positioning plate. The movable block of the positioning plate contacts the spiral groove of the spiral rod. A spring is sleeved on the circumferential surface of the spiral rod. The top of the sliding rod contacts the outer wall of the fixed shell. The sliding rod contacts the outer wall of the support frame.

[0021] The anti-deviation mechanism includes a sliding rod, a long buckle, and a snap-fit ​​plate. The sliding rod is slidably embedded in the inner wall of the arc-shaped plate by a spring. The long buckle is fixedly connected to the outer wall of the sliding rod. The snap-fit ​​plate is fixedly connected to the telescopic end of the telescopic baffle.

[0022] While providing protection, in order to ensure that the telescopic baffle drives the snap-fit ​​plate to engage and fix with the long buckle, even if the safety interlock system of the test device experiences a brief malfunction, the self-locking function can form a double safety protection, reduce the incidence of safety accidents, and improve the safety of the staff.

[0023] The anti-deviation mechanism also includes an elastic telescopic rod, a round wheel, a rotating rod, a roller, and a trapezoidal plate. The elastic telescopic rod is fixedly connected to the outer wall of the fixed shell. The round wheel is installed at the telescopic end of the elastic telescopic rod. The rotating rod is rotatably connected to the output end of the elastic telescopic rod through a torsion spring. The roller is installed on the inner wall of the rotating rod. The trapezoidal plate is fixedly connected to the fixed end of the elastic telescopic rod.

[0024] Meanwhile, when the fixed shell moves the elastic telescopic rod, the elastic telescopic rod drives the round wheel and roller to prevent vibration. This can suppress the unexpected vibration of the specimen, ensure the accuracy of fatigue life test results, extend the service life of the test device, and improve the continuity of the test.

[0025] A spring is fitted onto the circumferential surface of the long buckle, the long buckle contacts the outer wall of the arc plate, the circumferential surface of the roller contacts the fixed end of the elastic telescopic rod, the elastic telescopic rod is fixedly connected to the outer wall of the support frame, and the circumferential surface of the wheel contacts the swivel joint of the loading arm.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In this invention, during testing, after the loading arm rotary joint is placed inside the support frame, the fixed shell is pressed down. The fixed shell will drive the clamping plate and pulley to limit the movement, ensuring the safety and validity of the test data, avoiding stress distortion caused by shaking, improving the overall stability of the equipment, and making the equipment testing more stable. During the rotation test, the rotating rod drives the circular plate to move, and the circular plate drives the support plate to move to both sides. The support plate will increase the friction with the inner wall of the loading arm rotary joint through the rubber plate on the outer wall. At this time, the rotation of the support plate will drive the rotation part of the loading arm rotary joint to rotate through the rubber plate, avoiding experimental instability caused by human operation error, ensuring the consistency of fatigue damage and actual service, and improving the overall stability of the equipment.

[0028] 2. In this invention, during the experiment, the fixed shell drives the sliding rod downward, and the sliding rod drives the positioning plate to rotate, thereby positioning the loading arm rotary joint. This avoids uneven force on the sealing pair caused by the offset of the center of motion, ensuring that the fatigue damage location is consistent. There is no need to readjust the loading mechanism and sensor position, which greatly shortens the changeover time. At the same time, in order to prevent the loading arm rotary joint from causing injury to the test personnel, the pull rod drives the telescopic baffle for protection. The loading arm rotary joint needs to withstand high-frequency flying debris in the fatigue test. The telescopic baffle can block the debris and improve the overall stability of the equipment.

[0029] 3. In this invention, while providing protection, in order to ensure that the telescopic baffle drives the snap-fit ​​plate to engage and fix with the long buckle, even if the safety interlock system of the test device experiences a brief malfunction, the self-locking function can still form double safety protection, reducing the incidence of safety accidents and improving the safety of personnel. At the same time, when the fixed shell drives the elastic telescopic rod to move, the elastic telescopic rod drives the round wheel to engage with the roller to prevent vibration. This can suppress the unexpected vibration of the specimen, ensure the accuracy of fatigue life test results, extend the service life of the test device, and improve the continuity of the test. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram showing the position and structure of the support frame and the fixing shell of the present invention;

[0032] Figure 3 This is a schematic diagram showing the positional structure of the limiting rod and the L-shaped rod of the present invention;

[0033] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structural position at point A in the middle;

[0034] Figure 5 This is a schematic diagram showing the positional structure of the rotating rod and the circular plate in this invention;

[0035] Figure 6 This is a schematic diagram showing the position and structure of the support plate and pressure bar of the present invention;

[0036] Figure 7 This is a schematic diagram showing the positional structure of the ring and the rotary joint of the loading arm in this invention;

[0037] Figure 8 This is a schematic diagram showing the position and structure of the telescopic baffle and the pull rod of the present invention;

[0038] Figure 9 This is a schematic diagram showing the positional structure of the positioning plate and the screw rod of the present invention;

[0039] Figure 10This is a schematic diagram showing the position and structure of the slide rod and the long buckle of the present invention;

[0040] Figure 11 This is a schematic diagram showing the position and structure of the elastic telescopic rod and the wheel of the present invention;

[0041] Figure 12 This is a schematic diagram showing the position and structure of the rotating rod and roller in this invention.

[0042] The meanings of the labels in the diagram are as follows:

[0043] 1. Test bench; 2. Electric slide rail; 3. Electric slide plate one; 4. Electric push plate; 5. Lifting plate; 6. Support frame; 7. Fixed shell; 8. Clamping plate; 9. Limiting rod; 10. L-shaped rod; 11. Pulley; 12. Electric slide plate two; 13. Fixed platform; 14. Motor; 15. Rotating rod; 16. Circular plate; 17. Support plate; 18. Pressure rod; 19. Ring; 20. Protective mechanism; 201. Limiting plate; 202. Positioning plate; 203. Spiral rod; 204. Ring plate; 205. Sliding rod; 206. Arc plate; 207. Telescopic baffle; 208. Pull rod; 21. Anti-deviation mechanism; 211. Sliding rod; 212. Long buckle; 213. Clamping plate; 214. Elastic telescopic rod; 215. Round wheel; 216. Rotating rod; 217. Roller; 218. Trapezoidal plate. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-7 One embodiment of the present invention is: a fatigue life simulation test device for loading arm rotary joints, comprising a test platform 1, an electric slide rail 2, an electric slide plate 3, a support frame 6, a fixed shell 7, an electric slide plate 2 12, and a loading arm rotary joint. The electric slide rail 2 is fixedly connected to the top of the test platform 1. The electric slide plate 3 is fixedly installed on the moving end of the electric slide rail 2. The electric slide plate 2 12 is fixedly installed on the moving end of the electric slide rail 2. The support frame 6 is fixedly connected to the test platform 1. The fixed shell 7 is slidably embedded in the support frame 6. The support frame 6 has a placement groove inside. The fixed shell 7 has a placement groove inside. The loading arm rotary joint is disposed inside the fixed shell 7.

[0046] The fatigue life simulation test device for rotary joints of loading arms also includes:

[0047] An anti-detachment mechanism for fixing the installation during the inspection of the rotary joint of the loading arm is installed on the outer wall of the fixing shell 7;

[0048] The anti-fall mechanism includes a limiting rod 9, which is fixedly connected to the outer wall of the support frame 6. An L-shaped rod 10 is slidably embedded in the circumferential surface of the limiting rod 9. A spring is sleeved on the circumferential surface of the limiting rod 9. A pulley 11 is installed inside the L-shaped rod 10. A locking plate 8 is fixedly connected to the outer wall of the fixed shell 7. A locking groove is opened on the outer wall of the locking plate 8. The circumferential surface of the pulley 11 contacts the locking groove of the locking plate 8. An electric push plate 4 is fixedly connected to the top of the electric sliding plate 3. A lifting plate 5 is fixedly connected to the output end of the electric push plate 4.

[0049] The protective mechanism 20, used for safety protection during fatigue testing of the rotary joint of the loading arm, is installed on the top of the test bench 1.

[0050] An anti-deviation mechanism 21, used to prevent the rotary joint of the loading arm from shaking and shifting during testing, is provided on the outer wall of the fixed housing 7.

[0051] The anti-fall mechanism also includes a fixed platform 13, a motor 14, a rotating rod 15, a circular plate 16, a support plate 17, a pressure rod 18, and a ring 19. The fixed platform 13 is fixedly connected to the top of the electric sliding plate 12, the motor 14 is fixedly connected to the top of the electric sliding plate 12, the rotating rod 15 is fixedly connected to the output end of the motor 14, and the circumferential surface of the rotating rod 15 is rotatably connected to the inside of the fixed platform 13. The circular plate 16 is fixedly connected to the end of the rotating rod 15 away from the motor 14. The support plate 17 is slidably embedded in the inside of the circular plate 16 by a spring. The pressure rod 18 is slidably embedded in the inside of the circular plate 16 by a spring. The ring 19 is fixedly connected to the side of the pressure rod 18 away from the circular plate 16.

[0052] The outer wall of the lifting plate 5 contacts the bottom of the swivel joint of the loading arm, the outer wall of the clamping plate 8 contacts the outer wall of the support frame 6, the bottom of the clamping plate 8 is provided with an inclined surface, the L-shaped rod 10 contacts the outer wall of the support frame 6, the support plate 17 is provided with an inclined surface on the side near the pressure rod 18, the pressure rod 18 is provided with an inclined surface on the side away from the ring 19, the inclined surface of the support plate 17 contacts the inclined surface of the pressure rod 18, and the outer wall of the support plate 17 is provided with a rubber plate.

[0053] Among them, electric slide plate 13 and electric slide plate 212 move along electric slide rail 2 toward support frame 6, L-shaped rod 10 moves toward clamping plate 8 through spring between it and limit rod 9, the inside of circular plate 16 is provided with a slot, and spring is provided between support plate 17 and pressure rod 18 and circular plate 16.

[0054] In this embodiment, during operation: When the loading arm rotary joint is completed, a portion needs to be sampled for testing. At this time, workers place the loading arm rotary joint inside the support frame 6. After the loading arm rotary joint is placed inside the support frame 6, the fixing shell 7 is pressed down. The fixing shell 7 will drive the clamping plate 8 to move. The movement of the clamping plate 8 will cause its bottom inclined surface to contact the circumferential surface of the pulley 11, thereby driving the pulley 11 to move to both sides. The pulley 11 will drive the L-shaped rod 10 to move to both sides. The L-shaped rod 10 will move along both sides of the limiting rod 9, at which point the L-shaped rod 10 will compress the spring. When the pulley 11 enters the clamping groove of the clamping plate 8, the L-shaped rod 10 will rebound due to the spring. Thus, the pulley 11, in conjunction with the clamping plate 8, will fix the loading arm rotary joint between the fixing shell 7 and the support frame 6. When the experiment ends, the electric push plate 4 is activated. The electric push plate 4 will drive the lifting plate 5 to move through the output end. The lifting plate 5 will lift the swivel joint of the loading arm. When the experiment ends, the L-shaped rod 10 is manually pulled to move. The movement of the L-shaped rod 10 will drive the pulley 11 to move. When the pulley 11 leaves the internal slot of the clamping plate 8, the limit on the clamping plate 8 will be released. Then, the swivel joint of the loading arm can be taken out by pulling the fixing shell 7. This is not only to stabilize the specimen on the equipment, but also to restore the stress environment under real working conditions and ensure the safety and validity of the test data. It effectively isolates the specimen from the equipment body, avoids stress distortion caused by shaking effect, improves the overall stability of the equipment, avoids recalibration of working parameters due to changes in specimen specifications, shortens changeover time, and improves batch testing efficiency.

[0055] During rotation testing, the electric slide rail 2 can be activated. The electric slide rail 2 moves the electric sliding plate 12 via its moving end. The electric sliding plate 12 moves the fixed platform 13, which in turn moves the rotating rod 15. The rotating rod 15 moves the circular plate 16, which in turn moves the pressure rod 18. The pressure rod 18 moves the circular ring 19. After the circular ring 19 contacts the inside of the loading arm rotary joint, it continues to move a short distance, compressing the circular ring 19 and causing it to contract. The circular ring 19 then causes the pressure rod 18 to contract. At this point, the pressure rod 18 contacts the inclined surface of the support plate 17, causing the support plate 17 to compress the internal spring of the circular plate 16. This causes the support plate 17 to move to both sides and contact the inside of the loading arm rotary joint. The rubber plate on the outer wall of the support plate 17 increases the friction with the inner wall of the loading arm rotary joint. The motor 14 is started to operate. The motor 14 drives the rotating rod 15 to rotate through its output end. The rotating rod 15 drives the circular plate 16 to rotate. The rotation of the circular plate 16 drives the support plate 17 to rotate. The rotation of the support plate 17 drives the rotating part of the loading arm rotary joint to rotate through the rubber plate. When the experiment ends, the electric sliding plate 12 drives the fixed platform 13 to move. The fixed platform 13 drives the rotating rod 15 to move. The rotating rod 15 drives the circular plate 16 to move. At this time, the pressure rod 18 will be reset by the spring on the inner wall of the circular plate 16. The pressure rod 18 will release the compression limit on the support plate 17, so that the support plate 17 will retract by the spring between it and the circular plate 16. This avoids the distortion of working conditions caused by human operation error, ensures the consistency of fatigue damage with actual service, improves the overall working efficiency of the equipment, and also improves the overall stability of the equipment.

[0056] Please see Figures 8-12 Based on the above embodiments, in another embodiment of the present invention, the protective mechanism 20 includes a limiting plate 201, a positioning plate 202, a spiral rod 203, an annular plate 204, and a sliding rod 205. The limiting plate 201 is fixedly connected to the outer wall of the support frame 6, the positioning plate 202 is rotatably mounted on the limiting plate 201, the spiral rod 203 is slidably embedded in the inner wall of the positioning plate 202, the annular plate 204 is fixedly connected to the circumferential surface of the spiral rod 203, and the sliding rod 205 is fixedly connected to the top of the spiral rod 203.

[0057] The protective mechanism 20 also includes an arc plate 206, a telescopic baffle 207 and a pull rod 208. The arc plate 206 is fixedly connected to the test bench 1, the telescopic baffle 207 is slidably embedded in the arc plate 206, and the pull rod 208 is fixedly connected to the telescopic end of the telescopic baffle 207.

[0058] The interior of the limiting plate 201 is slidably embedded in the circumferential surface of the spiral rod 203. The circumferential surface of the spiral rod 203 has a quarter spiral groove. A movable block is fixedly connected to the inner wall of the positioning plate 202. The movable block of the positioning plate 202 contacts the spiral groove of the spiral rod 203. A spring is sleeved on the circumferential surface of the spiral rod 203. The top of the sliding rod 205 contacts the outer wall of the fixed shell 7. The sliding rod 205 contacts the outer wall of the support frame 6.

[0059] The positioning plate 202 is in contact with the outer wall of the rotating joint of the loading arm.

[0060] The anti-deviation mechanism 21 includes a slide rod 211, a long buckle 212, and a snap-fit ​​plate 213. The slide rod 211 is slidably embedded in the inner wall of the arc plate 206 by a spring. The long buckle 212 is fixedly connected to the outer wall of the slide rod 211. The snap-fit ​​plate 213 is fixedly connected to the telescopic end of the telescopic baffle 207.

[0061] The anti-deviation mechanism 21 also includes an elastic telescopic rod 214, a round wheel 215, a rotating rod 216, a roller 217, and a trapezoidal plate 218. The elastic telescopic rod 214 is fixedly connected to the outer wall of the fixed shell 7. The round wheel 215 is installed at the telescopic end of the elastic telescopic rod 214. The rotating rod 216 is rotatably connected to the output end of the elastic telescopic rod 214 through a torsion spring. The roller 217 is installed on the inner wall of the rotating rod 216. The trapezoidal plate 218 is fixedly connected to the fixed end of the elastic telescopic rod 214.

[0062] A spring is fitted onto the circumferential surface of the long buckle 212. The long buckle 212 contacts the outer wall of the arc plate 206. The circumferential surface of the roller 217 contacts the fixed end of the elastic telescopic rod 214. The elastic telescopic rod 214 is fixedly connected to the outer wall of the support frame 6. The circumferential surface of the round wheel 215 contacts the rotary joint of the loading arm.

[0063] Among them, the roller 217 moves along the trajectory of the trapezoidal plate 218.

[0064] In this embodiment, during operation: when the loading arm rotary joint is fixed by the fixed shell 7 and the support frame 6, the fixed shell 7 moves and contacts the top of the sliding rod 205 through the contact surface. At this time, the sliding rod 205 will be subjected to downward pressure from the fixed shell 7, which will drive the screw rod 203 to move downward. The movement of the screw rod 203 will contact the movable block on the inner wall of the positioning plate 202 through the spiral groove on the circumferential surface, thereby causing the movable block to rotate along the quarter spiral groove with the screw rod 203. The movable block will drive the positioning plate 202 to rotate 90 degrees. The rotation of the positioning plate 202 will affect the loading arm rotary joint. When positioning is completed, the limiting of sliding rod 205 is released by pulling fixed shell 7. At this time, the spring sleeved on the circumferential surface of spiral rod 203 contacts annular plate 204, thereby driving spiral rod 203 to elastically reset. Spiral groove on the circumferential surface of spiral rod 203 will drive positioning plate 202 to rotate 90 degrees in the opposite direction, thereby releasing the positioning of loading arm rotary joint. This avoids uneven force on sealing pair and distortion of shell stress distribution caused by offset of motion center, ensuring that fatigue damage location is consistent with actual failure location. There is no need to readjust loading mechanism and sensor position, greatly shortening changeover time and improving batch testing efficiency.

[0065] During the experiment, to prevent the swivel joint of the loading arm from causing injury to the experimenters, the staff will pull the lever 208 to move it. The lever 208 will cause the telescopic baffle 207 to slide and extend. The telescopic baffle 207 will extend along the groove of the arc plate 206. The telescopic baffle 207 will protect the loading arm swivel joint being tested inside. In the fatigue test, the loading arm swivel joint needs to withstand high frequency and high load reciprocating rotation and swing. When the joint breaks due to material fatigue and structural failure, the fragments will fly at a high speed. The telescopic baffle 207 can block the fragments and prevent the operator or surrounding personnel from being hit or scratched, thus improving the overall stability of the equipment.

[0066] While providing protection, to ensure the stability of the telescopic baffle 207, the movement of the telescopic baffle 207 will cause the locking plate 213 to move. The locking plate 213 slides along the direction of the long buckle 212. At this time, the locking plate 213 slides through the inclined surface and contacts the inclined surface of the long buckle 212, thereby causing the long buckle 212 to move. The movement of the long buckle 212 will compress the spring sleeved on the circumferential surface of the slide rod 211, thereby causing the slide rod 211 to move. When the locking plate 213 enters the inner wall groove of the long buckle 212, the locking plate 213 will... The long buckle 212 is used for locking and fixing. After the test is completed, the long buckle 212 is pulled to move it, so that the limit on the locking plate 213 is released. Then, the pull rod 208 is pulled to drive the telescopic baffle 207 to reset. This prevents personnel from accidentally touching or opening the telescopic baffle 207 due to curiosity during the test, and directly exposing them to the risk of high-speed rotating parts and flying specimens. Even if the safety interlock system of the test device malfunctions briefly, the self-locking function can form double safety protection, eliminating the possibility of personnel entering the dangerous area from the mechanical structure level and reducing the accident rate.

[0067] When the swivel joint of the loading arm enters the interior of the support frame 6 and the fixed shell 7, the fixed shell 7 drives the elastic telescopic rod 214 to move. The elastic telescopic rod 214 drives the wheel 215 at the telescopic end to move, so that the wheel 215 contacts the rotating part of the loading arm swivel joint. At this time, the wheel 215 contacts the rotating part, thereby compressing the telescopic end of the elastic telescopic rod 214 to contract. The telescopic end of the elastic telescopic rod 214 drives the rotating rod 216 to move, and the rotating rod 216 drives the roller 217 to move. The moving roller 217 will contact the trapezoidal plate 218, thereby damping the telescopic end of the elastic telescopic rod 214. At this time, the loading arm swivel joint will be anti-vibration through the wheel 215 and the roller 217. By suppressing the unexpected vibration of the specimen, the alternating load is applied strictly according to the test plan, ensuring that the stress distribution is consistent with the actual working conditions, thereby ensuring the accuracy of the fatigue life test results. At the same time, it reduces the abnormal wear of the core components of the equipment, extends the service life of the test device, and avoids test interruption due to equipment failure, thus improving the continuity of the test.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A swivel joint fatigue life simulation test device for a hose, comprising a test table (1), an electric sliding rail (2), an electric sliding plate (3), a support frame (6), a fixed shell (7), an electric sliding plate (12) and a swivel joint, the electric sliding rail (2) is fixedly connected to the top of the test table (1), the electric sliding plate (3) is fixedly installed on the moving end of the electric sliding rail (2), the electric sliding plate (12) is fixedly installed on the moving end of the electric sliding rail (2), the support frame (6) is fixedly connected to the test table (1), the fixed shell (7) is slidably embedded in the support frame (6), the inside of the support frame (6) is provided with a placing groove, the inside of the fixed shell (7) is provided with a placing groove, and the swivel joint is arranged in the inside of the fixed shell (7), characterized in that, The fatigue life simulation test device for the rotary joint of the loading arm also includes: An anti-detachment mechanism for fixing the rotating joint of the loading arm during inspection is provided on the outer wall of the fixed shell (7); The anti-fall mechanism includes a limiting rod (9), which is fixedly connected to the outer wall of the support frame (6). An L-shaped rod (10) is slidably embedded in the circumferential surface of the limiting rod (9). A spring is sleeved on the circumferential surface of the limiting rod (9). A pulley (11) is installed inside the L-shaped rod (10). A card plate (8) is fixedly connected to the outer wall of the fixed shell (7). A card groove is opened on the outer wall of the card plate (8). The circumferential surface of the pulley (11) contacts the card groove of the card plate (8). An electric push plate (4) is fixedly connected to the top of the electric slide plate (3). A lifting plate (5) is fixedly connected to the output end of the electric push plate (4). A protective mechanism (20) for safety protection during fatigue testing of the rotary joint of the loading arm is installed on the top of the test bench (1); An anti-deviation mechanism (21) for preventing the rotary joint of the loading arm from shaking and shifting during testing is provided on the outer wall of the fixed shell (7); The anti-fall-off mechanism also includes a fixed platform (13), a motor (14), a rotating rod (15), a circular plate (16), a support plate (17), a pressure rod (18), and a ring (19). The fixed platform (13) is fixedly connected to the top of the electric sliding plate (12). The motor (14) is fixedly connected to the top of the electric sliding plate (12). The rotating rod (15) is fixedly connected to the output end of the motor (14). The circumferential surface of the rotating rod (15) is rotatably connected to the inside of the fixed platform (13). The circular plate (16) is fixedly connected to the end of the rotating rod (15) away from the motor (14). The support plate (17) is slidably embedded in the inside of the circular plate (16) by a spring. The pressure rod (18) is slidably embedded in the inside of the circular plate (16) by a spring. The ring (19) is fixedly connected to the side of the pressure rod (18) away from the circular plate (16). The outer wall of the lifting plate (5) is in contact with the bottom of the swivel joint of the loading arm, the outer wall of the clamping plate (8) is in contact with the outer wall of the support frame (6), the bottom of the clamping plate (8) is provided with an inclined surface, the L-shaped rod (10) is in contact with the outer wall of the support frame (6), the side of the support plate (17) near the pressure rod (18) is provided with an inclined surface, the side of the pressure rod (18) away from the ring (19) is provided with an inclined surface, the inclined surface of the support plate (17) is in contact with the inclined surface of the pressure rod (18), and the outer wall of the support plate (17) is provided with a rubber plate.

2. The fatigue life simulation test device for the rotary joint of the loading arm according to claim 1, characterized in that: The protective mechanism (20) includes a limiting plate (201), a positioning plate (202), a spiral rod (203), an annular plate (204), and a sliding rod (205). The limiting plate (201) is fixedly connected to the outer wall of the support frame (6). The positioning plate (202) is rotatably mounted on the limiting plate (201). The spiral rod (203) is slidably embedded in the inner wall of the positioning plate (202). The annular plate (204) is fixedly connected to the circumferential surface of the spiral rod (203). The sliding rod (205) is fixedly connected to the top of the spiral rod (203).

3. The fatigue life simulation test device for the rotary joint of the loading arm according to claim 2, characterized in that: The protective mechanism (20) also includes an arc plate (206), a telescopic baffle (207) and a pull rod (208). The arc plate (206) is fixedly connected to the test bench (1), the telescopic baffle (207) is slidably embedded in the arc plate (206), and the pull rod (208) is fixedly connected to the telescopic end of the telescopic baffle (207).

4. The fatigue life simulation test device for the rotary joint of the loading arm according to claim 3, characterized in that: The interior of the limiting plate (201) is slidably embedded in the circumferential surface of the spiral rod (203). The circumferential surface of the spiral rod (203) has a quarter spiral groove. The inner wall of the positioning plate (202) is fixedly connected to a movable block. The movable block of the positioning plate (202) contacts the spiral groove of the spiral rod (203). The circumferential surface of the spiral rod (203) is sleeved with a spring. The top of the sliding rod (205) contacts the outer wall of the fixed shell (7). The sliding rod (205) contacts the outer wall of the support frame (6).

5. The fatigue life simulation test device for the rotary joint of the loading arm according to claim 4, characterized in that: The anti-deviation mechanism (21) includes a slide rod (211), a long buckle (212), and a snap-fit ​​plate (213). The slide rod (211) is slidably embedded in the inner wall of the arc plate (206) by a spring. The long buckle (212) is fixedly connected to the outer wall of the slide rod (211). The snap-fit ​​plate (213) is fixedly connected to the telescopic end of the telescopic baffle (207).

6. The fatigue life simulation test device for the rotary joint of the loading arm according to claim 5, characterized in that: The anti-deviation mechanism (21) further includes an elastic telescopic rod (214), a wheel (215), a rotating rod (216), a roller (217), and a trapezoidal plate (218). The elastic telescopic rod (214) is fixedly connected to the outer wall of the fixed shell (7). The wheel (215) is installed at the telescopic end of the elastic telescopic rod (214). The rotating rod (216) is rotatably connected to the output end of the elastic telescopic rod (214) through a torsion spring. The roller (217) is installed on the inner wall of the rotating rod (216). The trapezoidal plate (218) is fixedly connected to the fixed end of the elastic telescopic rod (214).

7. The fatigue life simulation test device for loading arm rotary joints according to claim 6, characterized in that: The long buckle (212) has a spring attached to its circumferential surface. The long buckle (212) is in contact with the outer wall of the arc plate (206). The circumferential surface of the roller (217) is in contact with the fixed end of the elastic telescopic rod (214). The elastic telescopic rod (214) is fixedly connected to the outer wall of the support frame (6). The circumferential surface of the wheel (215) is in contact with the rotating joint of the loading arm.

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