Empty can online detection device and detection method thereof

Abstract

The invention relates to the technical field of empty can detection, and discloses an empty can online detection device and a detection method thereof.The empty can online detection device comprises a conveyor, a blocking air cylinder is fixedly connected to the side wall of the conveyor, a can body is placed on the top of the conveyor, a connecting frame is fixedly connected to the top of the conveyor, and the conveyor is started to convey the can body; a fixing plate I is in a static state, so that when the connecting frame descends, the top of the inner wall of the connecting frame is close to the fixing plate I, the fixing plate I extrudes gas in the connecting frame, and the gas in the connecting frame is blocked by a blocking cylinder, an electric telescopic rod is started to extend out, a connecting frame is pushed to descend, and a connecting block and a spring sliding ring descend to be close to the tank body to seal the tank body; at the moment, the extruded gas is blocked by the blocking plate, so that the gas can generate high pressure, the high-pressure gas can enter the tank body after capping is completed, the extruded high-pressure gas can quickly enter the tank body, the gas injection time is shortened, and the detection of the tank body is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of empty can detection equipment, and in particular to an empty can online detection device and a detection method thereof. Background Art

[0002] An empty can refers to a semi-finished can that has not been filled with contents. Generally, an empty can is only equipped with one of the top cover or the bottom cover. In the field of can (barrel) manufacturing, an empty can can be a round food can, a milk powder can, or a round barrel. During the production process, the top cover, bottom cover and surrounding parts of the empty can are prone to cracks, gaps, holes and other damage, resulting in the production of defective products. In order to distinguish defective products, the empty cans need to be tested.

[0003] Among them, when testing the sealing of empty cans, a cover is often used to block the opening of the empty can first, and then the air in the empty can is inflated for testing. However, when testing empty cans with larger tank bodies, a longer inflation time is usually required, which affects the detection efficiency of the empty cans. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an empty can online detection device, comprising a conveyor, a blocking cylinder is fixedly connected to the side wall of the conveyor, a can body is placed on the top of the conveyor, a connecting frame is fixedly connected to the top of the conveyor, and an electric telescopic rod is fixedly connected to the top of the connecting frame;

[0005] The squeezing mechanism includes a connecting frame slidably connected to the inner wall of the connecting frame, the top of the connecting frame is fixedly connected to the bottom output end of the electric telescopic rod, five air inlet holes are opened on the inner wall of the connecting frame, a fixing plate 1 is slidably connected to the inner wall of the connecting frame, two fixing rods are fixedly connected to the top of the fixing plate 1, the tops of the two fixing rods are fixedly connected to the side of the connecting frame away from the electric telescopic rod, a connecting block is fixedly connected to the bottom of the connecting frame, a spring sliding ring is slidably connected to the outer wall of the connecting block, a sealing rubber strip is fixedly connected to the bottom of the spring sliding ring, the top of the spring sliding ring is fixedly connected to the bottom of the connecting frame, and a pushing component is provided on the inner wall of the connecting block;

[0006] The blocking mechanism comprises an air pipe which is connected through the inner wall of the connecting frame, the outer wall of the air pipe is connected through the inner wall of the connecting block, the inner wall of the fixed plate 1 is slidably connected to the outer wall of the air pipe, four blocking plates are rotatably connected to the inner wall of the air pipe, four pushing rods are fixedly connected to the top of the fixed plate 1, a bevel ring is fixedly connected to the inner wall of the air pipe, a spring ball rod is arranged on the inner wall of the air pipe, a sliding frame is fixedly connected to the inner wall of the air pipe, the inner wall of the sliding frame is slidably connected to the outer wall of the spring ball rod, a pressure sensor is fixedly connected to the inner wall of the air pipe, and the conveyor is started to transport the tank until the tank is blocked. The air blocking cylinder blocks it, and then the electric telescopic rod is started to extend, pushing the connecting frame down, allowing the connecting block and the spring sliding ring to descend and approach the tank body. Since the fixed plate 1 is in a stationary state, when the connecting frame descends, the top of the inner wall of the connecting frame will be close to the fixed plate 1 until the fixed plate 1 covers the air inlet. At this time, the fixed plate 1 and the connecting frame are in a sealed state. The connecting frame continues to move, and the fixed plate 1 will squeeze the gas in the connecting frame. At this time, the squeezed gas will be blocked by the blocking plate, so the gas will generate high pressure. As the connecting frame continues to descend, the sealing rubber strip will contact the outer wall of the tank body, causing the spring sliding ring to be squeezed, accumulating resilience, and the connecting block The push rod will push the baffle plate to rotate, causing a gap to leak out between the baffle plate and the gas pipe. The squeezed gas will enter the gas pipe through the gap, and the gas will push the spring ball rod to separate from the bevel ring. Since the bevel ring is conical in shape, the spring ball rod will accumulate resilience after separation from the bevel ring, causing a gap to leak out between the two. The gas will enter the tank through the gap, and the gas pressure in the connecting frame will be weakened, while the gas in the tank will increase until the air pressure in the connecting frame is equal to the gas in the tank. At this time, the air pressures between the two are equal. However, the spring ball rod has resilience when squeezed, and the resilience of the spring ball rod will be released, allowing the spring ball rod to contact the bevel ring to prevent the gas in the tank from flowing back. At this time, the tank is in a stable pressure state. The pressure sensor is used to detect the pressure fluctuation value inside the tank within a certain period of time after the closure. If it is found that the pressure in the tank exceeds the set pressure range after a period of time after the air pressure stabilizes, it is a leak, otherwise it is qualified. When the tank is sealed with a spring sliding ring, the squeezed high-pressure gas is allowed to quickly enter the tank, reducing the operation steps, quickly injecting gas, and also reducing the time for injecting gas, thereby speeding up the detection of the tank.

[0007] Preferably, the pushing assembly includes an annular groove opened on the inner wall of the connecting block, a hollow ring is slidably connected to the inner wall of the annular groove, a blocking ring is fixedly connected to the inner wall of the annular groove, two pushing blocks are fixedly connected to the top of the fixed plate, two rotating plates are rotatably connected to the inner wall of the connecting frame, and an expansion assembly is arranged on the inner wall of the annular groove.

[0008] Preferably, the pushing assembly further comprises two sliding rods fixedly connected to the top of the hollow ring, the outer walls of the two sliding rods are slidably connected to the inner wall of the connecting block, the outer walls of the two sliding rods are slidably connected to the inner wall of the fixing plate 1, and the outer walls of the two sliding rods are sleeved with return springs;

[0009] Among them, the tops of the two return springs are fixedly connected to the top inner wall of the annular groove, and the bottoms of the two return springs are fixedly connected to the top of the hollow ring. When gas is injected into the tank body, the connecting frame continues to descend, which will allow the rotating plate to contact the pushing block, allowing the pushing block to push the rotating plate to rotate, so that one side of the rotating plate rises and the other side lowers, and the lowered side will push the sliding rod to descend, thereby allowing the hollow ring to descend and the return spring to be stretched to accumulate resilience, and the hollow ring is blocked by the blocking ring to prevent the hollow ring from being lifted up by the high-pressure gas in the tank body. When the hollow ring descends, the space in the tank body will be reduced, which will cause the gas in the tank body to be compressed again, thereby increasing the gas pressure in the tank body again.

[0010] Preferably, the expansion assembly includes two fixed frames fixedly connected to the top of the inner wall of the annular groove, the inner walls of the two fixed frames are slidably connected with sliding plates, the top of the hollow ring is fixedly connected to two connecting rods, and the top of the inner wall of the annular groove is fixedly connected to two fixing frames.

[0011] Preferably, the expansion assembly also includes a rotating frame rotatably connected to the inner wall of the fixed frame, the bottoms of the two connecting rods are slidably connected to the inner walls of the two rotating frames, the side walls of the two sliding plates are slidably connected to the inner walls of the two rotating frames, and the tops of the two fixed frames are connected with an air intake hose. When the hollow ring descends, the connecting rod will also descend, pushing the rotating frame to rotate and causing the rotating frame to tilt, thereby pushing the sliding plate to move toward the direction of the air pipe.

[0012] Preferably, the expansion assembly also includes an air intake hose 2 connected to the bottom of the fixed frame, the outer walls of the two air intake hoses 2 are connected to the inner wall of the sealing rubber strip, the inner wall of the fixed plate 1 is slidably connected to the outer walls of the two air intake hoses 1, and the inner wall of the hollow ring is slidably connected to the outer walls of the two air intake hoses 2. When the sliding plate moves, it will separate from the air intake hose 1 and the air intake hose 2. At this time, since the internal gas of the connecting frame cannot enter the tank body, the gas inside the connecting frame still has a higher air pressure, the gas will enter the air intake hose 1.

[0013] Preferably, the expansion assembly further comprises two concave-convex plates fixedly connected to the side walls of the sliding plate, four rotating rods are rotatably connected to the inner wall of the connecting block, four fixed plates II are fixedly connected to the top of the inner wall of the annular groove, arc springs are fixedly connected to the outer walls of the four fixed plates II, and the outer walls of the four rotating rods are slidably connected to the outer wall of the hollow ring;

[0014] Among them, the sides of the four arc springs away from the fixed plate 2 are fixedly connected to the sides of the four rotating rods away from the sliding plate. When the sliding plate moves toward the gas pipe, it will also drive the concave-convex plate to move, so that the protruding position of the concave-convex plate contacts the protruding position of the rotating rod, thereby pushing the rotating rod to rotate, allowing the rotating rod to squeeze the arc spring, so that the arc spring accumulates rebound force. When the protruding position of the concave-convex plate is separated from the protruding position of the rotating rod, the rebound force of the arc spring will be released, allowing the rotating rod to return to its position.

[0015] A detection method for an empty can online detection device comprises the following steps:

[0016] S1: Start the equipment: Start the conveyor to transport the tank;

[0017] S2: Online detection: Start the electric telescopic rod to extend, push the connection frame, connection block and spring sliding ring down to the tank body, cap the tank body and inject gas, and use the pressure sensor to detect the pressure fluctuation value inside the tank body within a certain period of time after the closure. If it is found that the pressure inside the tank exceeds the set pressure range after a period of time after the air pressure stabilizes, it is a leak, otherwise it is qualified.

[0018] The present invention has the following beneficial effects:

[0019] (1) When the present invention is used, the conveyor is started to convey the tank body until the tank body is blocked by the blocking cylinder. Thereafter, the electric telescopic rod is started to extend, pushing the connection frame down, allowing the connection block and the spring sliding ring to descend and approach the tank body. Since the fixed plate 1 is in a stationary state, when the connection frame descends, the top of the inner wall of the connection frame will approach the fixed plate 1 until the fixed plate 1 covers the air inlet. At this time, the fixed plate 1 and the connection frame are in a sealed state. The connection frame continues to move, and the fixed plate 1 will squeeze the gas in the connection frame. At this time, the squeezed gas will be blocked by the blocking plate, so the gas will generate high pressure. As the connection frame continues to descend, the sealing rubber strip will contact the outer wall of the tank body, causing the spring sliding ring to be squeezed and accumulate rebound force. The connection block will enter the interior of the tank body, thereby making the tank body in a sealed state until the push rod contacts the blocking plate. The push rod will push the blocking plate to rotate, causing a gap to leak out between the blocking plate and the gas pipe. The squeezed gas will enter the gas pipe through the gap, and the gas will push the spring spherical rod When the spring is released, the gas in the tank is released and the pressure inside the tank is reduced, so that the gas in the tank is not compressed and the pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas pressure inside the tank is increased, and the pressure inside the tank is increased, so that the gas in ...

[0020] (2) After the gas is injected into the tank body, the connecting frame continues to descend, which will cause the rotating plate to contact the pushing block, allowing the pushing block to push the rotating plate to rotate, so that one side of the rotating plate rises and the other side lowers. The lowered side will push the sliding rod to descend, thereby causing the hollow ring to descend, allowing the return spring to be stretched and accumulate resilience. The hollow ring is blocked by the blocking ring to prevent the hollow ring from being lifted up by the high-pressure gas in the tank body. When the hollow ring descends, the space in the tank body will be reduced, which will cause the gas in the tank body to be compressed again, thereby increasing the gas pressure in the tank body again and causing the pressure to change. If a leak occurs in the tank body, the gas fluctuation in the tank body can be observed more quickly and intuitively by increasing the air pressure for the second time.

[0021] (3) When the hollow ring of the present invention descends, the connecting rod will also descend, pushing the rotating frame to rotate and tilting the rotating frame, thereby pushing the sliding plate to move toward the direction of the gas pipe. When the sliding plate moves, it will separate from the air intake hose 1 and the air intake hose 2. At this time, since the internal gas of the connecting frame cannot enter the tank body, the gas inside the connecting frame still has a higher air pressure, the gas will enter the air intake hose 1, enter the fixed frame through the air intake hose 1, and then enter the air intake hose 2, and enter the sealing rubber strip through the air intake hose 2, so that the sealing rubber strip expands, making the sealing effect of the sealing rubber strip better, and effectively preventing the secondary enhancement of the gas, and the gas leaking from the contact surface between the sealing rubber strip and the tank body, affecting the accuracy of the detection.

[0022] (4) When the sliding plate of the present invention moves toward the gas pipe, it also drives the concave-convex plate to move, so that the protruding position of the concave-convex plate contacts the protruding position of the rotating rod, thereby pushing the rotating rod to rotate, so that the rotating rod squeezes the arc spring, and the arc spring accumulates rebound force. When the protruding position of the concave-convex plate is separated from the protruding position of the rotating rod, the rebound force of the arc spring will be released, allowing the rotating rod to return to its original position. This reciprocating movement will cause the rotating rod to swing back and forth in the tank body, thereby disturbing the gas in the tank body, accelerating the flow speed of the gas in the tank body, simulating a dynamic environment, and making the sealing test of the tank body closer to actual use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the connection frame of the present invention;

[0027] Figure 4 It is a cross-sectional schematic diagram of the connection block of the present invention;

[0028] Figure 5 For the present invention Figure 4 A is an enlarged schematic diagram;

[0029] Figure 6 It is a cross-sectional schematic diagram of the hollow ring of the present invention;

[0030] Figure 7 For the present invention Figure 6A magnified schematic diagram of B;

[0031] Figure 8 This is a schematic diagram of the internal components of the connection block of the present invention;

[0032] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of middle C;

[0033] Fig.10 It is a schematic diagram of the working process of the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] In the figure: 1, conveyor; 11, blocking cylinder; 12, tank; 13, connecting frame; 14, electric telescopic rod; 2, extrusion mechanism; 21, connecting frame; 211, air inlet; 22, fixing plate 1; 221, fixing rod; 23, connecting block; 24, spring sliding ring; 241, sealing rubber strip; 3, blocking mechanism; 31, air pipe; 32, blocking plate; 33, pushing rod; 34, inclined ring; 35, spring round ball rod; 36, sliding frame; 37, Pressure sensor; 4. Pushing assembly; 41. Annular groove; 411. Blocking ring; 42. Hollow ring; 43. Pushing block; 44. Rotating plate; 45. Sliding rod; 46. Reset spring; 5. Expansion assembly; 51. Fixed frame; 52. Sliding plate; 53. Connecting rod; 54. Fixed frame; 55. Rotating frame; 56. Intake hose 1; 57. Intake hose 2; 58. Concave-convex plate; 581. Rotating rod; 582. Fixed plate 2; 583. Arc spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] For example, see Figure 1 - Figure 5 The present invention is an online empty can detection device, comprising a conveyor 1, a blocking cylinder 11 is fixedly connected to the side wall of the conveyor 1, a can body 12 is placed on the top of the conveyor 1, a connecting frame 13 is fixedly connected to the top of the conveyor 1, and an electric telescopic rod 14 is fixedly connected to the top of the connecting frame 13;

[0038] The squeezing mechanism 2 includes a connecting frame 21 slidably connected to the inner wall of the connecting frame 13, the top of the connecting frame 21 is fixedly connected to the bottom output end of the electric telescopic rod 14, five air inlet holes 211 are opened on the inner wall of the connecting frame 21, a fixing plate 22 is slidably connected to the inner wall of the connecting frame 21, two fixing rods 221 are fixedly connected to the top of the fixing plate 22, the tops of the two fixing rods 221 are fixedly connected to the side of the connecting frame 13 away from the electric telescopic rod 14, a connecting block 23 is fixedly connected to the bottom of the connecting frame 21, a spring sliding ring 24 is slidably connected to the outer wall of the connecting block 23, a sealing rubber strip 241 is fixedly connected to the bottom of the spring sliding ring 24, the top of the spring sliding ring 24 is fixedly connected to the bottom of the connecting frame 21, and a pushing component 4 is provided on the inner wall of the connecting block 23;

[0039] The blocking mechanism 3 includes an air pipe 31 connected to the inner wall of the connecting frame 21, the outer wall of the air pipe 31 is connected to the inner wall of the connecting block 23, the inner wall of the fixed plate 22 is slidably connected to the outer wall of the air pipe 31, four blocking plates 32 are rotatably connected to the inner wall of the air pipe 31, four push rods 33 are fixedly connected to the top of the fixed plate 22, a bevel ring 34 is fixedly connected to the inner wall of the air pipe 31, a spring ball rod 35 is arranged on the inner wall of the air pipe 31, a sliding frame 36 is fixedly connected to the inner wall of the air pipe 31, the inner wall of the sliding frame 36 is slidably connected to the outer wall of the spring ball rod 35, and a pressure sensor 37 is fixedly connected to the inner wall of the air pipe 31. The model of the pressure sensor 37 is: HPS700A-M, the range is: 0-1600Kpa, and the working voltage is: 1.8V-3.6V, start the conveyor 1 to convey the tank body 12 until the tank body 12 is blocked by the blocking cylinder 11, then start the electric telescopic rod 14 to extend, push the connecting frame 21 down, let the connecting block 23 and the spring sliding ring 24 descend close to the tank body 12, because the fixed plate 1 22 is in a stationary state, when the connecting frame 21 descends, the top of the inner wall of the connecting frame 21 will be close to the fixed plate 1 22 until the fixed plate 1 22 covers the air inlet 211, at this time, between the fixed plate 1 22 and the connecting frame 21, in a sealed state, the connecting frame 21 continues to move, and the fixed plate 1 22 will squeeze the connecting frame 2 1, at this time, the squeezed gas will be blocked by the blocking plate 32, so the gas will generate high pressure, as the connecting frame 21 continues to descend, the sealing rubber strip 241 will contact the outer wall of the tank body 12, so that the spring sliding ring 24 is squeezed and accumulates the rebound force, and the connecting block 23 will enter the interior of the tank body 12, so that the tank body 12 is in a sealed state until the push rod 33 contacts the blocking plate 32, and the push rod 33 will push the blocking plate 32 to rotate, so that a gap leaks out between the blocking plate 32 and the gas pipe 31, and the squeezed gas will enter the gas pipe 31 through the gap, and the gas The spring ball rod 35 will be pushed to separate from the bevel ring 34, allowing the spring ball rod 35 to accumulate resilience. Since the bevel ring 34 is conical in shape, a gap will leak out between the spring ball rod 35 and the bevel ring 34 after they are separated, and gas will enter the tank body 12 through the gap, and the gas pressure in the connecting frame 21 will be weakened, and the gas in the tank body 12 will increase until the gas pressure in the connecting frame 21 is equal to the gas in the tank body 12. At this time, the gas pressures between the two are equal, but the spring ball rod 35 is squeezed and has resilience, and the resilience of the spring ball rod 35 will be released, allowing the spring ball rod 35 and The bevel ring 34 contacts the tank body 12 to prevent the gas in the tank body 12 from flowing back. At this time, the tank body 12 is in a stable pressure state. The pressure sensor 37 detects the pressure fluctuation value within a certain period of time inside the closed tank body 12. If it is found that the pressure in the tank body 12 exceeds the set pressure range after a period of time after the air pressure is stable, it is leaking. Otherwise, it is qualified. When the tank body 12 is sealed by the spring sliding ring 24, the squeezed high-pressure gas is allowed to quickly enter the tank body 12, reducing the operation steps, quickly injecting gas, and also reducing the time of injecting gas, thereby speeding up the detection of the tank body 12.

[0040] For example 2, please refer to Figure 6 - Fig.10 The present invention is an online detection device for empty cans. On the basis of the first embodiment, the pushing component 4 includes an annular groove 41 opened on the inner wall of the connecting block 23, a hollow ring 42 is slidably connected to the inner wall of the annular groove 41, a blocking ring 411 is fixedly connected to the inner wall of the annular groove 41, two pushing blocks 43 are fixedly connected to the top of the fixed plate 22, two rotating plates 44 are rotatably connected to the inner wall of the connecting frame 21, and an expansion component 5 is provided on the inner wall of the annular groove 41.

[0041] The pushing assembly 4 also includes two sliding rods 45 fixedly connected to the top of the hollow ring 42, the outer walls of the two sliding rods 45 are slidably connected to the inner wall of the connecting block 23, the outer walls of the two sliding rods 45 are slidably connected to the inner wall of the fixed plate 22, and the outer walls of the two sliding rods 45 are sleeved with a return spring 46;

[0042] Among them, the tops of the two return springs 46 are fixedly connected to the top inner wall of the annular groove 41, and the bottoms of the two return springs 46 are fixedly connected to the top of the hollow ring 42. After the gas is injected into the tank body 12, the connecting frame 21 continues to descend, which will make the rotating plate 44 contact with the pushing block 43, and the pushing block 43 will push the rotating plate 44 to rotate, so that one side of the rotating plate 44 is raised and the other side is lowered. The lowered side will push the sliding rod 45 to descend, so that the hollow ring 42 will descend, and the return spring 46 will be stretched to accumulate resilience, and the hollow ring 42 will be blocked by the blocking ring 411 to prevent the hollow ring 42 from being lifted up by the high-pressure gas in the tank body 12. When the hollow ring 42 descends, the space in the tank body 12 will be reduced, and the gas in the tank body 12 will be compressed again, so that the gas pressure in the tank body 12 will be increased again.

[0043] The expansion assembly 5 includes two fixed frames 51 fixedly connected to the top of the inner wall of the annular groove 41, and the inner walls of the two fixed frames 51 are slidably connected with sliding plates 52. The top of the hollow ring 42 is fixedly connected with two connecting rods 53, and the top of the inner wall of the annular groove 41 is fixedly connected with two fixing frames 54.

[0044] The expansion assembly 5 also includes a rotating frame 55 rotatably connected to the inner wall of the fixed frame 54, the bottoms of the two connecting rods 53 are slidably connected to the inner walls of the two rotating frames 55, the side walls of the two sliding plates 52 are slidably connected to the inner walls of the two rotating frames 55, and the tops of the two fixed frames 51 are connected through an air intake hose 56. When the hollow ring 42 descends, the connecting rod 53 will also descend, pushing the rotating frame 55 to rotate and tilting the rotating frame 55, thereby pushing the sliding plate 52 to move toward the air pipe 31.

[0045] The expansion assembly 5 also includes an air intake hose 57 which is connected to the bottom of the fixed frame 51. The outer walls of the two air intake hoses 57 are connected to the inner wall of the sealing rubber strip 241. The inner wall of the fixed plate 22 is slidably connected to the outer walls of the two air intake hoses 56. The inner wall of the hollow ring 42 is slidably connected to the outer walls of the two air intake hoses 57. When the sliding plate 52 moves, it will separate from the air intake hoses 56 and 57. At this time, since the internal gas of the connecting frame 21 cannot enter the tank body 12, the gas inside the connecting frame 21 still has a higher air pressure, and the gas will enter the air intake hose 56.

[0046] The expansion assembly 5 also includes two concave-convex plates 58 fixedly connected to the side wall of the sliding plate 52, four rotating rods 581 are rotatably connected to the inner wall of the connecting block 23, four fixed plates 582 are fixedly connected to the top of the inner wall of the annular groove 41, and arc springs 583 are fixedly connected to the outer walls of the four fixed plates 582, and the outer walls of the four rotating rods 581 are slidably connected to the outer wall of the hollow ring 42;

[0047] Among them, the side of the four arc springs 583 away from the fixed plate 582 is fixedly connected to the side of the four rotating rods 581 away from the sliding plate 52. When the sliding plate 52 moves toward the air pipe 31, it will also drive the concave-convex plate 58 to move, so that the protruding position of the concave-convex plate 58 contacts the protruding position of the rotating rod 581, thereby pushing the rotating rod 581 to rotate, allowing the rotating rod 581 to squeeze the arc spring 583, so that the arc spring 583 accumulates rebound force. When the protruding position of the concave-convex plate 58 is separated from the protruding position of the rotating rod 581, the rebound force of the arc spring 583 will be released, allowing the rotating rod 581 to return to its position.

[0048] There is no limitation on the number of the above components, and relevant technicians in the field can freely set them according to actual needs, as long as the above components are installed at the connection positions of the corresponding components.

[0049] The detection method of the empty can online detection device includes the following steps:

[0050] S1: Start the equipment: Start the conveyor 1 to convey the tank 12;

[0051] S2: Online detection: Start the electric telescopic rod 14 to extend, push the connection frame 21, the connection block 23 and the spring sliding ring 24 down to the tank body 12, and perform the capping and gas injection process on the tank body 12. Through the pressure sensor 37, detect the pressure fluctuation value inside the tank body 12 within a certain period of time after the sealing. If it is found that the pressure inside the tank body 12 exceeds the set pressure range after a period of time after the air pressure stabilizes, it is a leak, otherwise it is qualified.

[0052] A specific application of this embodiment is: when the present invention is used, the conveyor 1 is started to convey the tank body 12 until the tank body 12 is blocked by the blocking cylinder 11, and then the electric telescopic rod 14 is started to extend to push the connecting frame 21 down, so that the connecting block 23 and the spring sliding ring 24 are lowered close to the tank body 12. Since the fixed plate 22 is in a stationary state, when the connecting frame 21 is lowered, the top of the inner wall of the connecting frame 21 will be close to the fixed plate 22 until the fixed plate 22 covers the air inlet 211. At this time, the fixed plate 22 and the connecting frame 21 are in a sealed state, and the connecting frame 21 continues to move. The fixed plate 22 will squeeze the gas in the connecting frame 21. At this time, the squeezed gas will be blocked by the blocking plate 32, so the gas will generate high pressure. As the connecting frame 21 continues to descend, the sealing rubber strip 241 will contact the outer wall of the tank body 12, so that the spring sliding ring 24 is squeezed and accumulates resilience. The connecting block 23 will enter the interior of the tank body 12, so that the tank body 12 is in a sealed state until the push rod 33 contacts the blocking plate 32. The push rod 33 will push the blocking plate 32 to rotate, so that a gap leaks out between the blocking plate 32 and the gas pipe 31, and the squeezed gas will enter the gas pipe 31 through the gap. In the air pipe 31, the gas will push the spring ball rod 35 to separate from the bevel ring 34, allowing the spring ball rod 35 to accumulate resilience. Since the bevel ring 34 is conical in shape, after the spring ball rod 35 is separated from the bevel ring 34, a gap will leak out between the two, and the gas will enter the tank body 12 through the gap, and the gas pressure in the connecting frame 21 will be weakened, and the gas pressure in the tank body 12 will increase until the air pressure in the connecting frame 21 is equal to the gas in the tank body 12. At this time, the air pressures between the two are equal, but the spring ball rod 35 is squeezed and has resilience, and the resilience of the spring ball rod 35 will be released, allowing the spring ball rod 35 to The ball rod 35 contacts the bevel ring 34 to prevent the gas in the tank body 12 from flowing back. At this time, the tank body 12 is in a stable pressure state. The pressure sensor 37 is used to detect the pressure fluctuation value in the tank body 12 within a certain period of time after the closed tank body 12. If it is found that the pressure in the tank body 12 exceeds the set pressure range after a period of time after the air pressure is stable, it is leaking. Otherwise, it is qualified. When the tank body 12 is sealed by the spring sliding ring 24, the squeezed high-pressure gas is allowed to quickly enter the tank body 12, which reduces the operation steps, quickly injects the gas, and also reduces the time of injecting the gas, thereby speeding up the detection of the tank body 12;

[0053] After the inspection of the tank body 12 is completed, the electric telescopic rod 14 is retracted to allow the connection frame 21 to rise, so that the spring sliding ring 24 and the connection block 23 rise and separate from the tank body 12 until the connection frame 21 returns to its original position, so that the air inlet 211 is connected with the top of the connection frame 21 again, and the outside air is allowed to enter the connection frame 21 through the air inlet 211 to complete the gas replenishment, and then the blocking cylinder 11 is retracted to cancel the blocking of the tank body 12, so that the tank body 12 is transported by the conveyor 1;

[0054] Secondly, after the gas is injected into the tank body 12, the connecting frame 21 continues to descend, which will make the rotating plate 44 contact with the pushing block 43, so that the pushing block 43 pushes the rotating plate 44 to rotate, so that one side of the rotating plate 44 rises and the other side falls. The lowered side will push the sliding rod 45 to descend, so that the hollow ring 42 descends, and the return spring 46 is stretched to accumulate resilience, and the hollow ring 42 is blocked by the blocking ring 411 to prevent the hollow ring 42 from being lifted up by the high-pressure gas in the tank body 12. When the hollow ring 42 descends, the space in the tank body 12 is reduced, and the gas in the tank body 12 is compressed again, so that the gas pressure in the tank body 12 is increased again, and the pressure changes. If there is a leak in the tank body 12, the gas fluctuation in the tank body 12 can be observed faster and more intuitively by increasing the air pressure for the second time.

[0055] Secondly, when the hollow ring 42 descends, the connecting rod 53 will also descend, pushing the rotating frame 55 to rotate and tilting the rotating frame 55, thereby pushing the sliding plate 52 to move toward the gas pipe 31. When the sliding plate 52 moves, it will separate from the air intake hose 1 56 and the air intake hose 2 57. At this time, since the internal gas of the connecting frame 21 cannot enter the tank body 12, but the gas inside the connecting frame 21 still has a high air pressure, the gas will enter the air intake hose 1 56, enter the fixed frame 51 through the air intake hose 1 56, and then enter the air intake hose 2 57, and enter the sealing rubber strip 241 through the air intake hose 2 57, so that the sealing rubber strip 241 expands, so that the sealing effect of the sealing rubber strip 241 is better, and the gas is effectively prevented from being enhanced twice, and the gas leaks from the contact surface between the sealing rubber strip 241 and the tank body 12, affecting the accuracy of the detection;

[0056] Secondly, when the sliding plate 52 moves toward the gas delivery pipe 31, it also drives the concave-convex plate 58 to move, so that the protruding position of the concave-convex plate 58 contacts the protruding position of the rotating rod 581, thereby pushing the rotating rod 581 to rotate, so that the rotating rod 581 squeezes the arc spring 583, so that the arc spring 583 accumulates a rebound force. When the protruding position of the concave-convex plate 58 is separated from the protruding position of the rotating rod 581, the rebound force of the arc spring 583 will be released, so that the rotating rod 581 returns to its original position. In this way, the rotating rod 581 will swing back and forth in the tank body 12, thereby disturbing the gas in the tank body 12, accelerating the flow speed of the gas in the tank body 12, simulating a dynamic environment, and making the sealing test of the tank body 12 closer to the actual use conditions;

[0057] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An empty can online detection device, comprising a conveyor (1), a blocking cylinder (11) is fixedly connected to the side wall of the conveyor (1), a can body (12) is placed on the top of the conveyor (1), a connecting frame (13) is fixedly connected to the top of the conveyor (1), and an electric telescopic rod (14) is fixedly connected to the top of the connecting frame (13), characterized in that: Also includes: The squeezing mechanism (2) comprises a connecting frame (21) slidably connected to the inner wall of the connecting frame (13), the top of the connecting frame (21) is fixedly connected to the bottom output end of the electric telescopic rod (14), the inner wall of the connecting frame (21) is provided with five air inlet holes (211), the inner wall of the connecting frame (21) is slidably connected to a fixing plate 1 (22), the top of the fixing plate 1 (22) is fixedly connected to two fixing rods (221), and the two fixing rods (22 1) are fixedly connected to the side of the connecting frame (13) away from the electric telescopic rod (14), the bottom of the connecting frame (21) is fixedly connected to a connecting block (23), the outer wall of the connecting block (23) is slidably connected to a spring sliding ring (24), the bottom of the spring sliding ring (24) is fixedly connected to a sealing rubber strip (241), the top of the spring sliding ring (24) is fixedly connected to the bottom of the connecting frame (21), and the inner wall of the connecting block (23) is provided with a pushing component (4); The blocking mechanism (3) comprises an air pipe (31) connected to the inner wall of the connection frame (21); the outer wall of the air pipe (31) is connected to the inner wall of the connection block (23); the inner wall of the fixing plate (22) is connected to the outer wall of the air pipe (31) in a sliding manner; the inner wall of the air pipe (31) is connected to four blocking plates (32) in a rotatable manner; the top of the fixing plate (22) is fixedly connected to the air pipe (31); There are four push rods (33), a bevel ring (34) is fixedly connected to the inner wall of the gas delivery pipe (31), a spring ball rod (35) is arranged on the inner wall of the gas delivery pipe (31), a sliding frame (36) is fixedly connected to the inner wall of the gas delivery pipe (31), the inner wall of the sliding frame (36) is slidably connected to the outer wall of the spring ball rod (35), and a pressure sensor (37) is fixedly connected to the inner wall of the gas delivery pipe (31).

2. The empty can online detection device according to claim 1, characterized in that: The pushing assembly (4) comprises an annular groove (41) provided on the inner wall of the connecting block (23); a hollow ring (42) is slidably connected to the inner wall of the annular groove (41); a blocking ring (411) is fixedly connected to the inner wall of the annular groove (41); two pushing blocks (43) are fixedly connected to the top of the fixing plate 1 (22); two rotating plates (44) are rotatably connected to the inner wall of the connecting frame (21); and an expansion assembly (5) is provided on the inner wall of the annular groove (41).

3. The empty can online detection device according to claim 2, characterized in that: The pushing assembly (4) further comprises two sliding rods (45) fixedly connected to the top of the hollow ring (42), the outer walls of the two sliding rods (45) being slidably connected to the inner wall of the connecting block (23), the outer walls of the two sliding rods (45) being slidably connected to the inner wall of the fixing plate (22), and the outer walls of the two sliding rods (45) being sleeved with a return spring (46); The tops of the two return springs (46) are fixedly connected to the top inner wall of the annular groove (41), and the bottoms of the two return springs (46) are fixedly connected to the top of the hollow ring (42).

4. The empty can online detection device according to claim 3, characterized in that: The expansion assembly (5) comprises two fixed frames (51) fixedly connected to the top of the inner wall of the annular groove (41), the inner walls of the two fixed frames (51) are slidably connected with sliding plates (52), the top of the hollow ring (42) is fixedly connected with two connecting rods (53), and the top of the inner wall of the annular groove (41) is fixedly connected with two fixing frames (54).

5. The empty can online detection device according to claim 4, characterized in that: The expansion assembly (5) further comprises a rotating frame (55) rotatably connected to the inner wall of the fixed frame (54), the bottoms of the two connecting rods (53) are slidably connected to the inner walls of the two rotating frames (55), the side walls of the two sliding plates (52) are slidably connected to the inner walls of the two rotating frames (55), and the tops of the two fixed frames (51) are connected through an air intake hose (56).

6. The empty can online detection device according to claim 5, characterized in that: The expansion assembly (5) also includes an air intake hose (57) connected to the bottom of the fixed frame (51); the outer walls of the two air intake hoses (57) are connected to the inner wall of the sealing rubber strip (241); the inner wall of the fixed plate (22) is slidably connected to the outer walls of the two air intake hoses (56); and the inner wall of the hollow ring (42) is slidably connected to the outer walls of the two air intake hoses (57).

7. The empty can online detection device according to claim 6, characterized in that: The expansion assembly (5) further comprises two concave-convex plates (58) fixedly connected to the side wall of the sliding plate (52); four rotating rods (581) are rotatably connected to the inner wall of the connecting block (23); four fixed plates (582) are fixedly connected to the top of the inner wall of the annular groove (41); arc springs (583) are fixedly connected to the outer walls of the four fixed plates (582); and the outer walls of the four rotating rods (581) are slidably connected to the outer wall of the hollow ring (42); Wherein, the sides of the four arc springs (583) away from the second fixed plate (582) are fixedly connected to the sides of the four rotating rods (581) away from the sliding plate (52).

8. A detection method of an empty can online detection device, using the empty can online detection device as claimed in claim 7, characterized in that: The following steps are included: S1: Start the equipment: Start the conveyor (1) to convey the tank (12); S2: Online detection: Start the electric telescopic rod (14) to extend, push the connection frame (21), the connection block (23) and the spring sliding ring (24) down to the tank body (12), and perform the capping and gas injection process on the tank body (12). Through the pressure sensor (37), detect the pressure fluctuation value inside the sealed tank body (12) within a certain period of time. If it is found that the pressure inside the tank body (12) exceeds the set pressure range after a period of time after the air pressure is stable, it is leaking, otherwise it is qualified.

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