A stainless steel well lid compression resistance testing device

Abstract

The application belongs to the technical field of stainless steel well lid compression resistance testing, in particular to a stainless steel well lid compression resistance testing device, which comprises a rack, two groups of driving shafts rotatably installed in the rack, two groups of chain wheels fixedly installed on the driving shafts, two groups of chains respectively engaged with the two groups of chain wheels, a plurality of groups of conveying plate assemblies arranged around the two groups of chains, a support frame fixedly installed on the rack, an electric push rod fixedly installed on the support frame, a conveying belt arranged at the bottom of the rack, and a placing seat fixedly installed on the plate body for placing the well lid. The chain wheel and the chain are adopted to realize multi-station continuous operation, and feeding, testing and discharging are carried out in parallel, thereby saving the well lid feeding and discharging time, eliminating the waiting time and feeding time of the traditional single-station detection, greatly improving the detection rhythm and the detection efficiency of the well lid.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel manhole cover pressure resistance testing technology, specifically a stainless steel manhole cover pressure resistance testing device. Background Technology

[0002] Manhole covers are a key infrastructure of urban underground pipe network systems, covering wells for water supply, drainage, electricity, and communications. They are subjected to vehicle pressure and environmental erosion, and are directly related to public safety and municipal operation and maintenance efficiency. Their quality defects can easily lead to accidents such as road collapse and falls causing injuries and deaths. Therefore, pressure resistance testing is a core link to ensure performance and plays an irreplaceable role in ensuring the safety of pedestrians and vehicles and improving the resilience of urban infrastructure.

[0003] Patent CN217981049U discloses a pressure resistance testing device for stainless steel manhole covers, including a placement platform, a support frame, an electric push rod, a probe, and an observer. The support frame is connected to the upper outer side of the placement platform, and an electric push rod, which serves as a power source, is installed in the middle of the support frame. A probe for measuring pressure is installed at the end of the push rod of the electric push rod. An observer for displaying pressure values ​​is provided on one side of the support frame. The device also includes a placement mechanism, which is placed on top of the placement platform for precise positioning of the stainless steel manhole cover. This solution achieves precise positioning of the manhole cover through the placement mechanism, ensuring that it is accurately placed in the center of the buffer plate, thus ensuring the accuracy of the pressure resistance test. At the same time, this mechanism simplifies the manhole cover handling process, improving testing efficiency and ease of operation.

[0004] In the above-mentioned scheme, before testing the manhole cover, it is necessary to place the manhole cover on the buffer plate. After the test is completed, the manhole cover needs to be removed from the buffer plate. During this process, the device needs to be paused when taking the manhole cover off and on. This not only prevents the device from continuously testing the manhole cover, but also wastes a lot of time and reduces the testing efficiency of the manhole cover. Therefore, the present invention provides a stainless steel manhole cover pressure resistance testing device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The stainless steel manhole cover pressure resistance testing device of the present invention includes a frame, two sets of drive shafts are rotatably installed inside the frame, two sets of sprockets are fixedly installed on the drive shafts, the two sets of sprockets respectively mesh with two sets of chains, several sets of conveyor plate assemblies are arranged around the two sets of chains, a support frame is fixedly installed on the frame, an electric push rod is fixedly installed on the support frame, a conveyor belt is provided at the bottom of the frame, and the conveyor plate assembly includes a plate body, two sets of chains are fixedly connected to both ends of the plate body, and a placement seat for placing the manhole cover is fixedly installed on the plate body; The system uses sprocket and chain drive to achieve multi-station continuous operation, with loading, testing and unloading carried out in parallel. This saves the time for loading and unloading manhole covers, eliminates the waiting time and loading time of traditional single-station testing, greatly improves the testing cycle time, and increases the testing efficiency of manhole covers.

[0007] Preferably, two sets of support plates are symmetrically arranged on both sides below the electric push rod. The support plates are fixedly connected to the inner wall of the frame and are used to support the plate body. When the conveyor plate assembly moves directly below the electric push rod, both ends of the plate on the conveyor plate assembly are located on two sets of support plates. When the electric push rod is pressed down, the support plates support the plate.

[0008] Preferably, the conveyor plate assembly further includes four sets of guide pillars, which are installed at equal angles on the bottom surface of the placement seat. Springs are sleeved on the guide pillars. All four sets of guide pillars are slidably connected to a movable ring. Four sets of rotating tubes are rotatably installed on the movable ring at equal angles. Fixed tubes are movably inserted into the rotating tubes. Fixed tubes are fixedly installed on the placement seat. A limiting plate is movably inserted into the upper end of the driven shaft. The lower end of the driven shaft is connected to the rotating tube. One end of the limiting plate is rotatably connected to the upper end of the fixed tube. Two sets of support plates are symmetrically arranged on the lower end of the movable ring. Rollers are rotatably installed on the lower end of the support plates. Two sets of guide plates are arranged between the two sets of drive shafts. The two sets of rollers are respectively rotatably connected to the outer rings of the two sets of guide plates. The lower end of the limiting plate is in contact with the upper end of the placement seat. The drive shaft is rotatably connected to the guide plate. The outer ring of the guide plate is composed of a first arc surface, an inclined surface, and a second arc surface. Two sets of first spiral grooves are opened on the fixed tube. Two sets of convex shafts are symmetrically arranged on the rotating tube. The two sets of convex shafts are respectively located in the two sets of first spiral grooves. Guided by the first spiral groove, the rotating tube, along with the driven shaft and the limiting plate, rotates until the roller rolls onto the second arc surface. The limiting plate rotates exactly 90 degrees, and the four sets of limiting plates are positioned above the manhole cover, thus limiting the manhole cover within the placement seat. When the manhole cover moves with the conveyor plate assembly to the closest point to the conveyor belt, the roller rolls from the second arc surface to the first arc surface. Under the action of the spring rebound force, the limiting plate will release the limiting plate from the manhole cover, and the manhole cover will automatically fall onto the conveyor belt. Because the manhole cover is close to the conveyor belt, the rebound generated by the manhole cover is very small, ensuring that the manhole cover can be neatly arranged on the conveyor belt.

[0009] Preferably, the conveyor plate assembly further includes a torsion spring, which is sleeved on the driven shaft. The rectangular shaft is movably inserted into the driven shaft. Two sets of receiving shafts are symmetrically arranged on the rectangular shaft. The driven shaft is rotatably connected to the rotating tube. The upper end of the torsion spring is fixedly connected to the inner wall of the rotating tube, and the lower end of the torsion spring is fixedly connected to the driven shaft. Two sets of limiting blocks are symmetrically arranged on the upper end of the rotating tube. Two sets of driving rods are symmetrically arranged on the driven shaft. The two sets of driving rods are respectively attached to the two sets of limiting blocks. Two sets of second spiral grooves are opened on the rotating tube. The ends of the two sets of receiving shafts are respectively located in the two sets of second spiral grooves. A material-lifting mechanism is arranged between the two sets of guide plates. The material-lifting mechanism includes a cylinder, which is fixedly installed between the two sets of guide plates. A material-lifting block for pushing the manhole cover is provided at the output end of the cylinder. Two sets of photoelectric sensors for detecting the rectangular shaft are symmetrically arranged on both sides of the material-lifting block. Guided by the second spiral groove, the receiving shaft drives the rectangular shaft to move downward, causing the lower end of the rectangular shaft to exit the rotating tube. When the deformed manhole cover moves above the top material mechanism along with the conveyor plate assembly, the part of the lower end of the rectangular shaft that has exited the rotating tube will block the photoelectric sensor. The photoelectric sensor controls the cylinder, and the cylinder pushes the top material block upward, causing the top material block to push the deformed manhole cover. The deformed manhole cover will then detach from the conveyor plate assembly and be removed by a special robotic arm, thus achieving the classification of good and defective manhole covers.

[0010] The beneficial effects of this invention are as follows: 1. The use of sprocket and chain drive enables multi-station continuous operation, with loading, testing and unloading carried out in parallel, saving the time for loading and unloading manhole covers, eliminating the waiting time and loading time of traditional single-station testing, greatly improving the testing cycle time and increasing the testing efficiency of manhole covers.

[0011] 2. The rollers on the conveyor plate assembly first roll along the first arc-shaped surface. After the manhole cover on the conveyor plate assembly passes the pressure test, the manhole cover continues to move in a circular motion with the conveyor plate assembly. At the same time, the rollers roll from the first arc-shaped surface to the inclined surface, and the rollers are pushed by the inclined surface, causing the rollers to drive the support plate, along with the movable ring and four sets of rotating tubes, to move upward. The movable ring slides along the four sets of guide posts and compresses the four sets of springs. Simultaneously, the rotating tubes move upward along the inner cavity of the fixed tube, and the rotating tubes drive the two sets of convex shafts to slide along the two sets of first spiral grooves respectively. Under the guidance of the guide, the rotating tube, along with the driven shaft and the limiting plate, rotates until the roller rolls onto the second arc surface. The limiting plate rotates exactly 90 degrees, and the four sets of limiting plates are located above the manhole cover, thus limiting the manhole cover within the placement seat. When the manhole cover moves with the conveyor plate assembly to the closest point to the conveyor belt, the roller rolls from the second arc surface to the first arc surface. Under the action of the spring rebound force, the limiting plate will release the limiting plate from the manhole cover, and the manhole cover will automatically fall onto the conveyor belt. Because the manhole cover is close to the conveyor belt, the rebound generated by the manhole cover is very small, ensuring that the manhole cover can be neatly arranged on the conveyor belt.

[0012] 3. As the roller drives the support plate, along with the movable ring and four sets of rotating tubes, to move upward, the rotating tubes drive the driven shaft and the limiting plate to rotate via the torsion spring. When the manhole cover deforms, the raised edge of the manhole cover will block the limiting plate, preventing it from rotating. At this time, the rotating tube continues to rotate relative to the driven shaft, the limiting plate, and the rectangular shaft, and the rotating tube twists the torsion spring. During this process, the two sets of receiving shafts slide along the two sets of second spiral grooves respectively. Guided by the second spiral grooves, the receiving shafts drive the rectangular shaft to move downward, causing the lower end of the rectangular shaft to move out of the rotating tube. When the deformed manhole cover moves above the top material mechanism along with the conveyor plate assembly, the part of the lower end of the rectangular shaft that moves out of the rotating tube will block the photoelectric sensor. The photoelectric sensor controls the cylinder, and the cylinder pushes the top material block to move upward, causing the top material block to push the deformed manhole cover. The deformed manhole cover will detach from the conveyor plate assembly and be removed by a special robotic arm, thus achieving the classification of good and defective manhole covers. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a cross-sectional view of the frame, chain, conveyor plate assembly, support frame, and electric push rod assembly of the present invention.

[0016] Figure 3 This is a schematic diagram of the conveyor plate assembly of the present invention.

[0017] Figure 4 This is a partial schematic diagram of the conveyor plate assembly of the present invention.

[0018] Figure 5 This is a schematic diagram of the combination of the rotating tube, the fixed tube in cross section, the driven shaft, and the limiting plate of the present invention.

[0019] Figure 6 This is a schematic diagram of the overall internal structure of the present invention.

[0020] Figure 7 This is a cross-sectional view of the rotating tube, the fixed tube, the driven shaft, and the limiting plate assembly of the present invention.

[0021] Figure 8 This is a schematic diagram of the combination of the rotating tube and the driven shaft of the present invention.

[0022] Figure 9 This is a schematic diagram of the assembly of the conveyor plate, electric push rod, guide plate, and top material mechanism of the present invention.

[0023] Figure 10 This is a schematic diagram of the combination of the conveyor plate assembly and the top material mechanism of the present invention.

[0024] In the diagram: 1. Frame; 101. Support plate; 2. Drive shaft; 201. Guide plate; 2011. First arc-shaped surface; 2012. Inclined surface; 2013. Second arc-shaped surface; 202. Ejector mechanism; 2021. Photoelectric sensor; 2022. Cylinder; 2023. Ejector block; 3. Sprocket; 4. Chain; 5. Conveyor plate assembly; 501. Plate; 502. Placement seat; 503. Guide post; 504. Spring; 50 5. Movable ring; 506. Support plate; 507. Roller; 508. Rotating tube; 5081. Convex shaft; 5082. Second spiral groove; 5083. Limiting block; 509. Fixed tube; 5091. First spiral groove; 510. Driven shaft; 5101. Drive rod; 511. Limiting plate; 512. Torsion spring; 513. Rectangular shaft; 514. Receiving shaft; 6. Manhole cover; 7. Support frame; 8. Electric push rod; 9. Conveyor belt. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0026] Example 1: As Figure 1 and Figure 2 As shown in the figure, the stainless steel manhole cover pressure resistance testing device of the present invention includes a frame 1, two sets of drive shafts 2 are rotatably installed inside the frame 1, two sets of sprockets 3 are fixedly installed on the drive shafts 2, the two sets of sprockets 3 respectively mesh with two sets of chains 4, and several sets of conveyor plate assemblies 5 are arranged around the two sets of chains 4. A support frame 7 is fixedly installed on the frame 1, an electric push rod 8 is fixedly installed on the support frame 7, and a conveyor belt 9 is provided at the bottom of the frame 1. The conveyor plate assembly 5 includes a plate body 501, two sets of chains 4 are fixedly connected to both ends of the plate body 501, and a placement seat 502 for placing the manhole cover 6 is fixedly installed on the plate body 501.

[0027] Specifically, attached Figure 1The middle arrow indicates the loading point. Initially, a set of conveyor plate assemblies 5 are located at the loading point. When a pressure test is required on the manhole cover 6, a dedicated robotic arm can be used to place the manhole cover 6 onto the conveyor plate assembly 5 located at the loading point. The manhole cover 6 is then placed inside the placement seat 502 on the conveyor plate assembly 5, with the upper surface of the manhole cover 6 flush with the upper surface of the placement seat 502. Next, a set of drive shafts 2 are driven by a motor to rotate. These drive shafts 2 drive two sets of sprockets 3 to rotate, which in turn drive two sets of chains 4 and several sets of conveyor plate assemblies 5 to perform circular motion. The direction from the loading point to the electric push rod 8 is the direction of circular motion. The manhole cover 6 will... The conveyor plate assembly 5 moves to the area directly below the electric push rod 8, then pauses its circular motion. The output end of the electric push rod 8 then presses down on the manhole cover 6 to perform a pressure test. During the test, a robotic arm continues to place the manhole cover 6 onto the conveyor plate assembly 5 at the loading point. After the pressure test of the manhole cover 6 is completed, several sets of conveyor plate assemblies 5 continue to perform circular motion, causing the conveyor plate assemblies 5 containing the manhole cover 6 to pass directly below the electric push rod 8 in sequence, performing a pressure test on the manhole cover 6. Simultaneously, during the circular motion, under the influence of gravity, the tested manhole cover 6 automatically falls onto the conveyor belt 9 below. Figure 2 The middle arrow indicates the conveying direction of conveyor belt 9, which realizes automatic unloading of manhole cover 6. The above operation is repeated cyclically. Compared with the existing technology, the use of sprockets 3 and 4 for chain drive realizes multi-station continuous operation. Loading, testing and unloading are carried out in parallel, saving the loading and unloading time of manhole cover 6, eliminating the waiting time and loading time of traditional single-station inspection, greatly improving the inspection cycle and improving the inspection efficiency of manhole cover 6.

[0028] Furthermore, two sets of support plates 101 are symmetrically arranged on both sides below the electric push rod 8. The support plates 101 are fixedly connected to the inner wall of the frame 1 and are used to support the plate body 501.

[0029] Specifically, when the conveyor plate assembly 5 moves directly below the electric push rod 8, the two ends of the plate 501 on the conveyor plate assembly 5 are respectively located on two sets of support plates 101. When the electric push rod 8 is pressed down, the support plates 101 support the plate 501.

[0030] like Figures 3 to 6As shown, the conveyor plate assembly 5 also includes four sets of guide posts 503, which are installed at equal angles on the bottom surface of the placement seat 502. Springs 504 are sleeved on the guide posts 503. All four sets of guide posts 503 are slidably connected to a movable ring 505. Four sets of rotating tubes 508 are rotatably installed on the movable ring 505 at equal angles. Fixed tubes 509 are movably inserted into the rotating tubes 508 and are fixedly installed on the placement seat 502. A limiting plate 511 is movably inserted into the upper end of the driven shaft 510, and the lower end of the driven shaft 510 is connected to the rotating tubes 508. One end of the limiting plate 511 is rotatably connected to the upper end of the fixed tube 509. Symmetrically arranged on the lower end of the movable ring 505 are... Two sets of support plates 506 are provided, with rollers 507 rotatably mounted on the lower end of the support plates 506. Two sets of guide plates 201 are provided between the two sets of drive shafts 2. The two sets of rollers 507 are respectively rotatably connected to the outer rings of the two sets of guide plates 201. The lower end face of the limiting plate 511 is in contact with the upper end face of the placement seat 502. The drive shaft 2 is rotatably connected to the guide plate 201. The outer ring of the guide plate 201 is composed of a first arc surface 2011, an inclined surface 2012, and a second arc surface 2013. Two sets of first spiral grooves 5091 are provided on the fixed tube 509. Two sets of convex shafts 5081 are symmetrically provided on the rotating tube 508. The two sets of convex shafts 5081 are respectively located in the two sets of first spiral grooves 5091.

[0031] Specifically, when the manhole cover 6 falls onto the conveyor belt 9 under its own weight, due to the large drop and lack of buffer guidance, the manhole cover 6 is prone to rebound, deviate or jump out after hitting the conveyor belt 9, resulting in scattered landing points and messy arrangement, which increases the workload of subsequent collection and sorting. As the conveyor plate assembly 5 moves from the loading point to directly below the electric push rod 8, the roller 507 on the conveyor plate assembly 5 first rolls along the first arc surface 2011. After the manhole cover 6 on the conveyor plate assembly 5 passes the pressure test, the manhole cover 6 continues to make circular motion with the conveyor plate assembly 5. At the same time, the roller 507 rolls from the first arc surface 2011 to the inclined surface 2012, and the roller 507 is pushed by the inclined surface 2012, causing the roller 507 to drive the support plate 506, together with the movable ring 505, the four sets of rotating tubes 508 and the corresponding driven shafts 510, to move upward. The movable ring 505 slides along the four sets of guide posts 503 and compresses the four sets of springs 504. At the same time, the rotating tube 508 moves upward along the inner cavity of the fixed tube 509, and the rotating tube 508 drives the two sets of convex shafts 5081 respectively. Sliding along the two sets of first spiral grooves 5091, the rotating tube 508, along with the driven shaft 510 and the limiting plate 511, rotates under the guidance of the first spiral grooves 5091 until the roller 507 rolls onto the second arc surface 2013. The limiting plate 511 rotates exactly 90 degrees, and the four sets of limiting plates 511 are located above the manhole cover 6, thus limiting the manhole cover 6 within the placement seat 502. When the manhole cover 6 moves with the conveyor plate assembly 5 to the closest point to the conveyor belt 9, the roller 507 rolls from the second arc surface 2013 onto the first arc surface 2011. Under the rebound force of the spring 504, the limiting plate 511 will release the manhole cover 6 from the limiting plate, and the manhole cover 6 will automatically fall onto the conveyor belt 9. Since the manhole cover 6 is close to the conveyor belt 9, the rebound generated by the manhole cover 6 is very small, ensuring that the manhole cover 6 can be neatly arranged on the conveyor belt 9.

[0032] Example 2: Figures 7 to 10 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the conveyor plate assembly 5 further includes a torsion spring 512, which is sleeved on the driven shaft 510. A rectangular shaft 513 is movably inserted into the driven shaft 510. Two sets of receiving shafts 514 are symmetrically arranged on the rectangular shaft 513. The driven shaft 510 is rotatably connected to the rotating tube 508. The upper end of the torsion spring 512 is fixedly connected to the inner wall of the rotating tube 508, and the lower end of the torsion spring 512 is fixedly connected to the driven shaft 510. Two sets of limiting blocks 5083 are symmetrically arranged on the upper end of the rotating tube 508, and two sets of drive rods 5101 are symmetrically arranged on the driven shaft 510. Two sets of drive rods 5101 are respectively attached to two sets of limit blocks 5083. Two sets of second spiral grooves 5082 are opened on the rotating tube 508. The ends of the two sets of receiving shafts 514 are respectively located in the two sets of second spiral grooves 5082. A top material mechanism 202 is provided between the two sets of guide plates 201. The top material mechanism 202 includes a cylinder 2022. The cylinder 2022 is fixedly installed between the two sets of guide plates 201. A top material block 2023 for pushing the manhole cover 6 is provided at the output end of the cylinder 2022. Two sets of photoelectric sensors 2021 for detecting the rectangular shaft 513 are symmetrically arranged on both sides of the top material block 2023.

[0033] Specifically, when the manhole cover 6 is pressed down by the electric push rod 8, if the manhole cover 6 deforms, the middle of the manhole cover 6 will be concave, and the area around the manhole cover 6 will be raised. This phenomenon is called "edge lifting effect" or "pot bottom effect". In this way, the edge of the manhole cover 6 will be higher than the upper surface of the placement seat 502, and the limiting plate 511 will not be able to rotate above the edge of the manhole cover 6. Initially, the rectangular shaft 513 is completely within the rotating tube 508. Therefore, when the roller 507 drives the support plate 506, along with the movable ring 505 and the four sets of rotating tubes 508 to move upward, the rotating tube 508 drives the driven shaft 510 and the limiting plate 511 to rotate via the torsion spring 512. When the manhole cover 6 deforms, the raised edge of the manhole cover 6 will block the limiting plate 511, preventing it from rotating. At this time, the rotating tube 508 continues to rotate relative to the driven shaft 510, the limiting plate 511, and the rectangular shaft 513, and the rotating tube 508 twists the torsion spring 512. During this process, the two sets of receiving shafts 514 slide along the two sets of second spiral grooves 5082 respectively. Guided by the second spiral grooves 5082, the receiving shafts 514 drive the rectangular shaft 513. The rectangular shaft 513 moves downward, causing its lower end to exit the rotating tube 508. When the deformed manhole cover 6 moves above the top material mechanism 202 along with the conveyor plate assembly 5, the portion of the lower end of the rectangular shaft 513 that has exited the rotating tube 508 will block the photoelectric sensor 2021. The photoelectric sensor 2021 controls the cylinder 2022, which pushes the top material block 2023 upward, causing the top material block 2023 to push the deformed manhole cover 6. The deformed manhole cover 6 will then detach from the conveyor plate assembly 5 and be removed by a dedicated robotic arm, thus classifying the manhole cover 6 as good or bad. Next, under the rebound force of the spring 504, the rotating tube 508 drives the drive rod 5101 through the limit block 5083, causing the driven shaft 510 and the limit plate 511 to rotate back.

[0034] Working principle: A dedicated robotic arm places the manhole cover 6 onto the conveyor plate assembly 5 located at the loading point. The manhole cover 6 is positioned within the placement seat 502 on the conveyor plate assembly 5, with the upper surface of the manhole cover 6 flush with the upper surface of the placement seat 502. Then, a motor drives a set of drive shafts 2 to rotate, which in turn drives two sets of sprockets 3 to rotate. The two sets of sprockets 3 drive two sets of chains 4 and several sets of conveyor plate assemblies 5 to perform circular motion. The direction of circular motion is from the loading point to the electric push rod 8. The manhole cover 6 will move along with the corresponding conveyor plate assembly 5 to directly below the electric push rod 8. The circular motion is then paused, and the output end of the electric push rod 8 is activated to press down on the manhole cover 6 to perform a pressure test on the manhole cover 6. During the test, the manhole cover 6 to be tested is placed onto the conveyor plate assembly 5 at the loading point by the robotic arm. After the pressure test of the manhole cover 6 is completed, several sets of conveyor plate assemblies 5 continue to be driven to perform circular motion, so that the conveyor plate assemblies 5 with the manhole cover 6 placed on them pass directly under the electric push rod 8 in sequence, and the manhole cover 6 is tested for pressure. At the same time, during the circular motion, under the action of gravity, the manhole cover 6 after the test will automatically fall onto the conveyor belt 9 below. Figure 2 The middle arrow indicates the conveying direction of conveyor belt 9, enabling automatic unloading of manhole cover 6, and repeating the above operation cyclically; As the conveyor plate assembly 5 moves from the loading point to directly below the electric push rod 8, the roller 507 on the conveyor plate assembly 5 first rolls along the first arc surface 2011. After the manhole cover 6 on the conveyor plate assembly 5 passes the pressure resistance test, the manhole cover 6 continues to make circular motion with the conveyor plate assembly 5. At the same time, the roller 507 rolls from the first arc surface 2011 to the inclined surface 2012, and the roller 507 is pushed by the inclined surface 2012, causing the roller 507 to drive the support plate 506, together with the movable ring 505, the four sets of rotating tubes 508 and the corresponding driven shaft 510, to move upward. The movable ring 505 slides along the four sets of guide posts 503, and the movable ring 505 compresses the four sets of springs 504. At the same time, the rotating tube 508 moves along the inner cavity of the fixed tube 509. The rotating tube 508 moves upward, and the rotating tube 508 drives the two sets of convex shafts 5081 to slide along the two sets of first spiral grooves 5091 respectively. Under the guidance of the first spiral grooves 5091, the rotating tube 508, together with the driven shaft 510 and the limiting plate 511, rotates until the roller 507 rolls onto the second arc surface 2013. The limiting plate 511 rotates exactly 90 degrees, and the four sets of limiting plates 511 are located above the manhole cover 6, thereby limiting the manhole cover 6 within the placement seat 502. When the manhole cover 6 moves with the conveyor plate assembly 5 to the closest point to the conveyor belt 9, the roller 507 rolls from the second arc surface 2013 onto the first arc surface 2011. Under the rebound force of the spring 504, the limiting plate 511 will release the limiting plate 511 from the manhole cover 6, and the manhole cover 6 will automatically fall onto the conveyor belt 9. As the roller 507 drives the support plate 506, along with the movable ring 505 and the four sets of rotating tubes 508 to move upward, the rotating tubes 508 drive the driven shaft 510 and the limiting plate 511 to rotate via the torsion spring 512. When the manhole cover 6 deforms, the raised edge of the manhole cover 6 will block the limiting plate 511, preventing the limiting plate 511 from rotating. At this time, the rotating tube 508 continues to rotate relative to the driven shaft 510, the limiting plate 511, and the rectangular shaft 513, and the rotating tube 508 twists the torsion spring 512. During this process, the two sets of receiving shafts 514 slide along the two sets of second spiral grooves 5082 respectively, guided by the second spiral grooves 5082. The receiving shaft 514 drives the rectangular shaft 513 to move downward, causing the lower end of the rectangular shaft 513 to move out of the rotating tube 508. When the deformed manhole cover 6 moves above the top material mechanism 202 along with the conveyor plate assembly 5, the part of the lower end of the rectangular shaft 513 that moves out of the rotating tube 508 will block the photoelectric sensor 2021. The photoelectric sensor 2021 controls the cylinder 2022, and the cylinder 2022 pushes the top material block 2023 to move upward, causing the top material block 2023 to push the deformed manhole cover 6. The deformed manhole cover 6 will then detach from the conveyor plate assembly 5 and be removed by a special robotic arm, thus achieving the classification of the manhole cover 6 into good and defective products.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel manhole cover pressure resistance testing device, comprising a frame (1), characterized in that: Two sets of drive shafts (2) are rotatably installed inside the frame (1). Two sets of sprockets (3) are fixedly installed on the drive shafts (2). The two sets of sprockets (3) respectively mesh with two sets of chains (4). Several sets of conveyor plate assemblies (5) are arranged around the two sets of chains (4). A support frame (7) is fixedly installed on the frame (1). An electric push rod (8) is fixedly installed on the support frame (7). A conveyor belt (9) is provided at the bottom of the frame (1). The conveyor plate assembly (5) includes a plate body (501), and two sets of chains (4) are fixedly connected to both ends of the plate body (501); A mounting base (502) for placing a manhole cover (6) is fixedly installed on the plate (501).

2. The stainless steel manhole cover pressure resistance testing device according to claim 1, characterized in that: Two sets of support plates (101) are symmetrically arranged on both sides below the electric push rod (8). The support plates (101) are fixedly connected to the inner wall of the frame (1) and are used to support the plate body (501).

3. The stainless steel manhole cover pressure resistance testing device according to claim 2, characterized in that: The conveyor plate assembly (5) also includes four sets of guide posts (503), which are installed at equal angles on the bottom surface of the placement seat (502); A spring (504) sleeved on the guide post (503); The movable ring (505) and the four sets of guide posts (503) are all slidably connected to the movable ring (505); Four sets of rotating tubes (508) are mounted on the movable ring (505) at equal angles. The fixed tube (509) is movably inserted into the rotating tube (508), and the fixed tube (509) is fixedly installed on the placement seat (502); Driven shaft (510), upper end of driven shaft (510) is movably inserted into limiting plate (511), lower end of driven shaft (510) is connected to rotating tube (508), one end of limiting plate (511) is rotatably connected to upper end of fixed tube (509).

4. The stainless steel manhole cover pressure resistance testing device according to claim 3, characterized in that: The lower end of the movable ring (505) is symmetrically provided with two sets of support plates (506), and the lower end of the support plate (506) is rotatably mounted with rollers (507). Two sets of guide plates (201) are provided between the two sets of drive shafts (2), and the two sets of rollers (507) are respectively rotatably connected to the outer rings of the two sets of guide plates (201).

5. The stainless steel manhole cover pressure resistance testing device according to claim 4, characterized in that: The lower end face of the limiting plate (511) is attached to the upper end face of the placement seat (502), and the drive shaft (2) is rotatably connected to the guide plate (201). The outer ring of the guide plate (201) is composed of a first arc surface (2011), an inclined surface (2012), and a second arc surface (2013).

6. The stainless steel manhole cover pressure resistance testing device according to claim 5, characterized in that: The fixed tube (509) has two sets of first spiral grooves (5091), and the rotating tube (508) has two sets of convex shafts (5081) symmetrically arranged. The two sets of convex shafts (5081) are respectively located in the two sets of first spiral grooves (5091).

7. The stainless steel manhole cover pressure resistance testing device according to claim 6, characterized in that: The conveyor plate assembly (5) also includes a torsion spring (512), which is sleeved on the driven shaft (510); A rectangular shaft (513) is movably inserted into the driven shaft (510). Two sets of receiving shafts (514) are symmetrically arranged on the rectangular shaft (513).

8. The stainless steel manhole cover pressure resistance testing device according to claim 7, characterized in that: The driven shaft (510) is rotatably connected to the rotating tube (508). The upper end of the torsion spring (512) is fixedly connected to the inner wall of the rotating tube (508), and the lower end of the torsion spring (512) is fixedly connected to the driven shaft (510). Two sets of limiting blocks (5083) are symmetrically arranged on the upper end of the rotating tube (508). Two sets of driving rods (5101) are symmetrically arranged on the driven shaft (510). The two sets of driving rods (5101) respectively fit into the two sets of limiting blocks (5083).

9. A stainless steel manhole cover pressure resistance testing device according to claim 8, characterized in that: The rotating tube (508) has two sets of second spiral grooves (5082), and the ends of the two sets of receiving shafts (514) are respectively located in the two sets of second spiral grooves (5082).

10. A stainless steel manhole cover pressure resistance testing device according to claim 9, characterized in that: A top material mechanism (202) is provided between the two sets of guide plates (201). The top material mechanism (202) includes a cylinder (2022). The cylinder (2022) is fixedly installed between the two sets of guide plates (201). A top material block (2023) for pushing the manhole cover (6) is provided at the output end of the cylinder (2022). Two sets of photoelectric sensors (2021) for detecting the rectangular axis (513) are symmetrically arranged on both sides of the top material block (2023).

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