An automatic target changer and method for changing targets that facilitates changing of the targets

Abstract

The application provides an automatic target plate device and a target plate replacement method, and relates to the technical field of pipeline cleaning and detection equipment. The automatic target plate device comprises a target plate shaft and a pipeline bearing the target plate shaft. A target plate positioning clamping groove is arranged on the target plate shaft. A rack is fixedly connected below the pipeline. A rotating mechanism is installed and connected on the rack. The power output end of the rotating mechanism is in transmission connection with the bottom end of the target plate shaft. A lifting mechanism is installed and connected on one side of the rotating mechanism. A relay assembly is arranged between the power output end of the rotating mechanism and the target plate shaft. The relay assembly can selectively transmit the power of the rotating mechanism to the target plate shaft. A cam is connected to the target plate shaft. A guide assembly is connected between the lifting end of the lifting mechanism and the relay assembly. A tangential assembly is slidingly matched on the guide assembly. The tangential assembly is in abutting and matching connection with the circumferential side of the cam. The application solves the problem of low target plate replacement operation efficiency in the prior art.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning and inspection equipment technology, and in particular to an automatic target plate device and target plate replacement method that facilitates target plate replacement. Background Technology

[0002] Steam purging is a core process for cleaning pipeline systems in thermal power generation, petrochemicals, and other fields. It uses high-pressure steam to remove mechanical impurities such as metal shavings and welding slag from inside pipes, ensuring the safe and economical operation of the steam system. The target plate test method is the mainstream approach in the industry for assessing purging cleanliness. The target plate device, as the core testing equipment, directly affects the pace and effectiveness of the purging test through its structure and operation.

[0003] Chinese invention patent CN208334316U discloses a target plate device for pipeline steam purging, which includes a pipe body and a target seat. The pipe body has an inlet flange and an outlet flange at both ends to connect to the pipeline to be purged. The target seat is connected to the outlet flange, and a target plate is installed inside the target seat, facing the steam outlet of the pipe body. The space between the target plate and the steam outlet connects the internal channel of the pipe body with the steam outlet channel. Chinese invention patent CN218486773U discloses a steam pipeline purging target plate installer, which is used to fix the target plate on the purging pipeline. Furthermore, conventional straight-shaft and axial-shaft target plate devices in the industry all use a target plate bearing-mounted target plate basic structure. A positioning structure is set on the target plate shaft to fix the target plate. After one purging test is completed, the target plate shaft is manually pulled out and reset, thereby completing the disassembly and replacement of the target plate.

[0004] The existing technology has the following drawbacks: when replacing the target plate, the displacement and positioning of the target plate shaft must be completed manually. The degree of human intervention is high. Due to the limitation of this operation method, the target plate replacement operation efficiency is low and it is difficult to meet the high-efficiency operation requirements of steam purging detection in industrial production. Summary of the Invention

[0005] This application provides an automatic target plate changer and target plate replacement method that facilitates target plate replacement, thereby solving the problem of low target plate replacement efficiency caused by the high degree of manual intervention in target plate axis displacement and positioning operations during target plate replacement in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automatic target plate device for easy target plate replacement, comprising a target plate shaft and a pipe supporting the target plate shaft, a target plate positioning slot provided on the target plate shaft, a frame fixedly connected directly below the pipe, a rotating mechanism mounted on the frame, the power output end of the rotating mechanism being drivenly connected to the bottom end of the target plate shaft; a lifting mechanism mounted on one side of the rotating mechanism; a relay component provided between the power output end of the rotating mechanism and the target plate shaft, the relay component being able to selectively transmit the power of the rotating mechanism. The target plate shaft is handed over; a cam is fixedly connected to the target plate shaft; a guide component is connected between the lifting end of the lifting mechanism and the relay component, and a tangential component is slidably fitted on the guide component, which abuts against the circumference of the cam; when the target plate shaft rotates 180 degrees, the tangential component abuts against the lifting end of the lifting mechanism, and when the lifting mechanism pushes the target plate shaft to move upward, the relay component stops transmitting the power of the rotating mechanism to the target plate shaft; when the lifting mechanism pulls the target plate shaft to move downward and reset, the relay component resumes transmitting the power of the rotating mechanism to the target plate shaft.

[0007] Because a frame is fixed directly below the pipeline, and a rotating mechanism connected to the bottom of the target plate shaft is mounted on the frame, a lifting mechanism is provided on one side of the rotating mechanism, a relay component is provided between the rotating mechanism and the target plate shaft, and a guide component is connected between the lifting mechanism and the relay component. A tangential component that slides on the guide component and abuts against the circumference of the cam on the target plate shaft is also provided. All the mechanisms work together to form a linkage structure. Therefore, when this device is in use, the target plate shaft can be automatically rotated 180 degrees by the rotating mechanism. The cam rotates with the target plate shaft and pushes the tangential component to trigger the lifting mechanism. At the same time, the relay component automatically disconnects the power transmission from the rotating mechanism to the target plate shaft. The lifting mechanism drives the target plate shaft to move upward automatically. After the target plate is replaced, the lifting mechanism can drive the target plate shaft to return to its original position downward. The relay component synchronously restores the power transmission from the rotating mechanism to the target plate shaft. The entire target plate replacement process does not require manual pulling and resetting of the target plate shaft, thus solving the problem of low efficiency in target plate replacement work caused by the high degree of manual intervention in the displacement and positioning of the target plate shaft during target plate replacement in the existing technology.

[0008] As a further improvement to the above solution, the lifting mechanism includes a lifting cylinder. The movable end of the lifting cylinder is fixedly connected to a hollow push platform. A pneumatic switch is installed inside the push platform. A cylinder elastic pressing pin is inserted into the side of the push platform facing the lifting mechanism. The cylinder elastic pressing pin cooperates with the pneumatic switch and can open and close the lifting cylinder. The push platform is fixedly connected to the guide assembly. Thus, the automatic opening and closing of the lifting cylinder can be achieved through the contact cooperation between the tangential assembly and the cylinder elastic pressing pin.

[0009] As a further improvement to the above solution, the guide component includes two symmetrically arranged guide rails, one end of each guide rail being fixedly connected to the lifting end of the lifting mechanism; the guide rails can provide stable and precise linear sliding guidance for the tangential component, ensuring that the tangential component moves along a predetermined trajectory.

[0010] As a further improvement to the above solution, the relay component includes an upper rotating sleeve, a lower rotating platform, and two limiting semi-rings; the two limiting semi-rings are respectively fixedly connected to the symmetrical plane of the guide rail on the corresponding side, and the opening direction of the two limiting semi-rings is horizontally facing the axis of the rotating mechanism, with two notches formed between the two ends of the two limiting semi-rings; the lower rotating platform is coaxially fixedly connected to the power output end of the rotating mechanism, and multiple grooves are equidistantly provided on the periphery of the lower rotating platform; the upper rotating sleeve is coaxially fixedly connected to the bottom end of the target plate shaft and sleeved on the outside of the lower rotating platform, and a spring-loaded pin-type limiting pin is inserted into one side of the upper rotating sleeve, the movable end of the spring-loaded pin-type limiting pin can be selectively inserted between the notches of the two limiting semi-rings, and when the outer end of the movable end of the spring-loaded pin-type limiting pin slides against the inner wall of the limiting semi-ring, the inner end of the movable end of the spring-loaded pin-type limiting pin is inserted into the groove of the lower rotating platform; the cam is fixedly connected to the target plate shaft; This allows for precise automatic switching of power transmission from the rotating mechanism to the target plate shaft through the cooperation of the spring-loaded pin-type limit pin, the limit half-ring, and the lower turntable. This switching action can match the rotation and lifting actions of the target plate shaft, and the fixing of the cam to the target plate shaft ensures that the two rotate synchronously, providing a precise action basis for subsequent linkage triggering.

[0011] As a further improvement to the above solution, the tangential assembly includes a limiting platform and a slide, both of which are slidably disposed between two guide rails, with the limiting platform positioned above the slide. A limiting elastic pin is provided at the top of the limiting platform, with its movable end facing downwards and passing through both the limiting platform and the slide in sequence. A roller is rotatably connected to the side of the limiting platform facing the rotating mechanism, and the roller slides against the circumference of the cam. A baffle is fixedly connected to the side of the slide facing the rotating mechanism; when the roller abuts against the proximal end of the cam, the baffle is inserted between the notches of the two limiting semi-rings near the slide. This allows the rotational motion of the target plate shaft to be converted into linear sliding of the tangential assembly, enabling the rotational motion to trigger the lifting mechanism. Simultaneously, the sliding contact between the roller and the cam reduces transmission friction, ensuring smooth motion transmission.

[0012] As a further improvement to the above solution, the width of the slide table is smaller than the width of the limiting platform; a positioning platform is fixedly connected to the lifting mechanism, and the positioning platform is correspondingly set with the movable end of the limiting elastic pin; the end of the limiting elastic pin is provided with two inclined surfaces along the moving direction of the slide table; an inclined surface is provided on the upper part of the slide table near the lifting mechanism; the width difference between the slide table and the limiting platform allows the limiting platform to trigger the lifting cylinder in advance, reserving space for the target plate shaft to continue rotating to 180 degrees, avoiding the target plate being blown away by the steam in the pipeline, and improving the detection accuracy; the positioning platform, the limiting elastic pin with inclined surfaces, and the slide table cooperate to realize the automatic unlocking and reset of the limiting elastic pin.

[0013] As a further improvement to the above solution, each of the guide rails has a first guide groove and a second guide groove on its symmetrical surface. The limiting platform is slidably disposed between two first guide grooves. A first guide rod is fixedly connected in the first guide groove along its length direction. A through hole is provided on the limiting platform for the first guide rod to pass through. A first spring is sleeved on the first guide rod. One end of the first spring is fixedly connected to the limiting platform, and the other end of the first spring is fixedly connected to the end of the first guide groove near the lifting mechanism. The sliding table is slidably disposed between two second guide grooves. A second guide rod is fixedly connected in the second guide groove along its length direction. A through hole is provided on the sliding table for the second guide rod to pass through. A second spring is sleeved on the second guide rod. One end of the second spring is fixedly connected to the sliding table, and the other end of the second spring is fixedly connected to the end of the second guide groove near the lifting mechanism. Independent guide grooves and guide rods provide sliding guidance for the limiting stage and slide, effectively avoiding motion interference between the two and ensuring the independence of the movement of each component of the tangential assembly; the elastic reset effect of the spring allows the limiting stage and slide to automatically return to their initial positions after the operation is completed, without the need for manual reset.

[0014] As a further improvement to the above solution, the rotating mechanism includes a positioning cylinder, a connecting shaft, and a motor; the connecting shaft is slidably inserted into the positioning cylinder, and the top end of the connecting shaft is fixedly connected to the bottom end of the relay component; a worm gear is coaxially sleeved on the connecting shaft, and the worm gear is rotatably connected to the top end of the positioning cylinder; a worm is meshed with the worm gear, and the worm is drivenly connected to the output end of the motor, which is fixedly connected to the frame via a bracket; a guide key is provided along the axis of the connecting shaft, and a keyway that mates with the guide key is provided on the worm gear, the axial length of the guide key is greater than the thickness of the worm gear, and the guide key and the keyway are slidably connected; the motor is electrically connected to the lifting mechanism; the worm gear transmission can achieve speed reduction and torque increase, making the rotation of the target plate shaft smoother; the guide key allows the connecting shaft to maintain rotational power transmission with the worm gear while rising and falling with the target plate shaft, and the positioning cylinder can provide stable support and guidance for the connecting shaft.

[0015] As a further improvement to the above solution, a flexible start pin is fixedly connected to the bracket. The flexible start pin is set to correspond to the notch at the end of the two limiting semi-rings away from the lifting mechanism. The flexible start pin is electrically connected to the motor.

[0016] This invention also discloses an automatic target plate replacement method, which uses an automatic target plate device as described above that facilitates target plate replacement, and specifically includes the following steps: S1. The motor-driven rotating mechanism drives the target plate shaft to rotate 180°. The cam on the target plate shaft rotates synchronously, pushing the tangential component to slide along the guide rail of the guide component towards the push platform of the lifting mechanism, triggering the lifting cylinder to start. S2. The lifting cylinder pushes the target plate axis upward through the pusher, and the spring pin limit pin of the relay component disengages from the groove of the lower turntable, and the relay component stops transmitting rotational power to the target plate axis. S3. After the target plate replacement is completed, the lifting cylinder pulls the target plate shaft downward to reset, and the relay component resumes transmitting rotational power to the target plate shaft. S4. The cam returns to its original position as the target plate shaft rotates, and the tangential assembly returns to its initial position along the guide rail.

[0017] As can be seen from the above technical solutions, the present invention has at least the following technical effects or advantages: Because a frame is fixed directly below the pipeline, and a rotating mechanism connected to the bottom of the target plate shaft is mounted on the frame, a lifting mechanism is provided on one side of the rotating mechanism, a relay component is provided between the rotating mechanism and the target plate shaft, and a guide component is connected between the lifting mechanism and the relay component. A tangential component that slides on the guide component and abuts against the circumference of the cam on the target plate shaft is also provided. All the mechanisms work together to form a linkage structure. Therefore, when this device is in use, the target plate shaft can be automatically rotated 180 degrees by the rotating mechanism. The cam rotates with the target plate shaft and pushes the tangential component to trigger the lifting mechanism. At the same time, the relay component automatically disconnects the power transmission from the rotating mechanism to the target plate shaft. The lifting mechanism drives the target plate shaft to move upward automatically. After the target plate is replaced, the lifting mechanism can drive the target plate shaft to return to its original position downward. The relay component synchronously restores the power transmission from the rotating mechanism to the target plate shaft. The entire target plate replacement process does not require manual pulling and resetting of the target plate shaft, thus solving the problem of low efficiency in target plate replacement work caused by the high degree of manual intervention in the displacement and positioning of the target plate shaft during target plate replacement in the existing technology. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the rotating mechanism of the present invention that drives the target plate shaft to rotate 180 degrees; Figure 3 This is a schematic diagram of the lifting mechanism of the present invention after it has been lifted. Figure 4 for Figure 3 Another perspective illustration; Figure 5 This is an exploded structural diagram of the lifting mechanism, rotating mechanism, and linkage mechanism in this invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the upper rotating sleeve and the lower rotating platform of the present invention; Figure 7 This is a schematic diagram of the target plate shaft structure of the present invention; Figure 8 for Figure 1 An enlarged schematic diagram of the structure at point A.

[0019] In the diagram: 1. Pipe; 2. Target plate shaft; 21. Target plate; 22. Upper rotating sleeve; 23. Lower rotating platform; 231. Groove; 24. Spring-loaded pin-type limit pin; 25. Connecting shaft; 3. Frame; 4. Lifting cylinder; 5. Push platform; 51. Guide rail; 52. Cylinder elastic pressing pin; 53. Positioning platform; 531. First guide groove; 532. Second guide groove; 533. Guide rod; 54. Limiting half ring; 55. Limiting platform; 551. Roller; 56. Slide table; 561. Baffle; 57. Limiting elastic pin; 6. Positioning cylinder; 7. Cam; 8. Bracket; 9. Motor; 91. Worm gear; 92. Worm wheel; 10. Elastic starting pin. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0021] Please see Figures 1 to 8 This invention discloses an automatic target plate changer for easy target plate replacement, comprising a target plate shaft 2 and a pipe 1 for supporting the target plate shaft 2, wherein the target plate shaft 2 is provided with a target plate 21 positioning groove, and further comprising: Frame 3 is fixedly installed directly below pipe 1; A rotating mechanism is mounted on the frame 3. The output end of the rotating mechanism is connected to the bottom end of the target plate shaft 2 and is used to drive the target plate shaft 2 to rotate. A lifting mechanism is located on one side of the rotating mechanism and is used to drive the target plate shaft 2 to lift. The linkage mechanism includes a relay component, a tangential component, a guide component, and a cam 7; The guide component is connected to the lifting end of the lifting mechanism at one end and to the relay component at the other end. The tangential component is slidably mounted on the guide component and engages with the circumferential side of the cam 7 to achieve precise linkage of the rotation and lifting movements of the target plate shaft 2. The relay component is located between the output end of the rotating mechanism and the target plate shaft 2, and can selectively transmit the power of the rotating mechanism to the target plate shaft 2; Cam 7 is fixedly mounted on target shaft 2. When target shaft 2 rotates, cam 7 will push the tangential component to move linearly along the guide component.

[0022] When the target shaft 2 rotates 180 degrees, the tangential component engages with the lifting end of the lifting mechanism. When the lifting mechanism pushes the target shaft 2 upward, the relay component stops transmitting power from the rotation mechanism to the target shaft 2. When the lifting mechanism pulls the target shaft 2 downward to reset, the relay component resumes transmitting power from the rotation mechanism to the target shaft 2. Through the cooperation of the cam 7 and the linkage mechanism, automatic switching between the transmission and interruption of rotational power, as well as automatic switching between the start and stop of the lifting action, can be achieved.

[0023] In this embodiment, the lifting mechanism includes a lifting cylinder 4. A hollow push platform 5 is fixedly connected to the movable end of the lifting cylinder 4. A pneumatic switch is installed inside the push platform 5, and a cylinder elastic pressing pin 52 is inserted into the side of the push platform 5 facing the lifting mechanism. When the tangential component abuts against the push platform 5, the cylinder elastic pressing pin 52 contacts the pneumatic switch to activate the lifting cylinder 4. The push platform 5 is fixedly connected to the guide component. When the cylinder elastic pressing pin 52 contacts the pneumatic switch, the pneumatic switch is open; when the spring of the cylinder elastic pressing pin 52 returns to its original position and disengages from the pneumatic switch, the pneumatic switch is closed.

[0024] In this embodiment, the guide component includes symmetrically arranged guide rails 51, one end of each guide rail 51 is fixedly connected to the lifting end of the lifting mechanism, and the other end is fixedly connected to the relay component.

[0025] In this embodiment, the relay component includes an upper rotating sleeve 22, a lower rotating platform 23, and a limiting half-ring 54. Two limiting half-rings 54 are provided, each limiting half-ring 54 is fixedly connected to the symmetrical plane of the guide rail 51 on the corresponding side, and the opening direction of the two limiting half-rings 54 is horizontally facing the axis of the rotating mechanism. Two notches are formed between the two ends of the two limiting half-rings 54, one notch is close to the lifting mechanism side, and the other notch is far away from the lifting mechanism side. The two ends of the limiting half-rings 54 are respectively provided with inclined surfaces.

[0026] The lower turntable 23 is coaxially fixedly connected to the output end of the rotating mechanism. Multiple grooves 231 are equidistantly spaced on the periphery of the lower turntable 23. The upper rotating sleeve 22 is coaxially fixedly connected to the bottom end of the target plate shaft 2 and sleeved outside the lower turntable 23. A spring-loaded pin-type limiting pin 24 is inserted into one side of the upper rotating sleeve 22. The movable end of the spring-loaded pin-type limiting pin 24 can be inserted between the notches of two limiting half-rings 54. When the outer end of the movable end of the spring-loaded pin-type limiting pin 24 slides against the inner wall of the limiting half-ring 54, the inner end of the movable end of the spring-loaded pin-type limiting pin 24 can be inserted into the groove 231 of the lower turntable 23. When the inner end of the movable end of the spring-loaded pin-type limiting pin 24 is inserted into the groove 231 of the lower turntable 23, the lower turntable 23 drives the upper rotating sleeve 22 to rotate, thereby driving the target plate shaft 2 to rotate. The cam 7 is coaxially fixedly mounted on the target plate shaft 2 and rotates synchronously with the target plate shaft 2.

[0027] In this embodiment, the tangential assembly includes a limiting platform 55 and a slide 56, both of which are slidably disposed between two guide rails 51, with the limiting platform 55 positioned above the slide 56. A limiting elastic pin 57 is provided at the top of the limiting platform 55, with its movable end facing downwards and passing through both the limiting platform 55 and the slide 56 sequentially. A roller 551 is rotatably connected to the side of the limiting platform 55 facing the rotating mechanism, and the roller 551 abuts against the periphery of the cam 7 and is slidably connected to the periphery of the cam 7. A baffle 561 is fixedly connected to the side of the slide 56 facing the rotating mechanism.

[0028] When roller 551 abuts against the proximal end of cam 7, baffle 561 is inserted between the notches of the two limiting semi-rings 54 near the slide table 56. The width of slide table 56 is smaller than the width of limiting platform 55. The purpose of this size design is that when limiting platform 55 pushes the cylinder elastic pressing pin 52 in and starts lifting cylinder 4, cam 7 can be set to rotate to 170 degrees. At this time, lifting cylinder 4 drives the linkage mechanism to move upward, and target plate shaft 2 continues to rotate until cam 7 rotates to 180 degrees and target plate shaft 2 stops rotating. Limiting platform 55 contacts push platform 5, and slide table 56 also moves to the set position. The trigger condition for this set position is that when lifting cylinder 4 descends, positioning platform 53 will press the end of limiting elastic pin 57 into the pin hole of slide table 56. When the lifting cylinder 4 descends, the positioning platform 53 collides with the bottom end of the limiting elastic pin 57, thereby pushing the limiting elastic pin 57 into the pin hole of the slide table 56.

[0029] When the lifting cylinder 4 rises and falls, because the width of the limiting platform 55 is greater than that of the slide 56, and the set cam 7 rotates to 170 degrees, the limiting platform 55 activates the lifting cylinder 4 by pressing the cylinder elastically against the pin 52 in conjunction with the air pressure switch. At this time, the cam 7 has not yet rotated to 180 degrees, and the lower turntable 23 continues to drive the upper rotating sleeve 22 to rotate. The cam 7 also continues to push the limiting platform 55 and the slide 56 to move along the guide rail 51 toward the lifting cylinder 4. At this time, the lifting cylinder 4 drives the linkage mechanism and the target plate shaft 2 to rise. The target plate shaft 2 continues to drive the cam 7 to rotate until the cam 7 rotates to 180 degrees. The spring-loaded pin-type limiting pin 24 of the upper rotating sleeve 22 disengages from the groove 231 of the lower turntable 23, and the lower turntable 23 can no longer drive the upper rotating sleeve 22 and the target plate shaft 2 to rotate. At this time, the limiting platform 55 and the push platform 5 are in contact, and the slide 56 also enters the set position. The limiting elastic pin 57 on the limiting platform 55 is located directly above the positioning platform 53 and will not collide with the positioning platform 53. Even if the lower end of the limiting elastic pin 57 collides with the positioning platform 53, the inclined section of the limiting elastic pin 57 will not be pressed into the pin hole of the slide 56.

[0030] When the lifting cylinder 4 returns to its downward position, the positioning platform 53 collides with the limiting elastic pin 57, pressing the inclined section of the limiting elastic pin 57 into the pin hole of the slide table 56. Because the lower end of the limiting elastic pin 57 has an inclined surface, under the elastic restoring force of the second spring, the slide table 56 is not restricted by the limiting elastic pin 57, but moves along the second guide groove 532 of the guide rail 51 towards the rotating mechanism, thereby pressing the spring-loaded pin-type limiting pin 24 into the groove 231 of the lower turntable 23, so that the lower turntable 23 can drive the upper rotating sleeve 22 to rotate, and then drive the target plate shaft 2 and the cam 7 to rotate. At this time, the lifting cylinder 4 is still in the process of descending. Because the limiting elastic pin 57 has a certain length, and as long as the inclined surface at the lower end of the limiting elastic pin 57 is pressed into the pin hole of the slide table 56, the inclined surface cannot provide locking force to the slide table 56 under the action of the elastic force of the second spring. When the slide table 56 moves towards the rotating mechanism, it will continue to push the pin of the limiting elastic pin 57 upward, that is, towards the limiting platform 55 side, until the slide table 56 is unlocked. Only then will the limiting elastic pin 57 return to its downward position. During the unlocking process of the slide table 56, there will be no collision or contact with the positioning platform 53.

[0031] When the slide 56 reaches its initial position, the cam 7 begins to rotate. Under the elastic force of the first spring, the limiting platform 55 also moves towards the rotating mechanism, thereby releasing the pressure on the cylinder elastic pressing pin 52, and subsequently releasing the contact with the pneumatic switch, causing the lifting cylinder 4 to stop descending until the lifting cylinder 4 returns to its initial position. When the limiting platform 55 moves to the initial position, because the end of the slide 56 near the lifting mechanism is provided with an inclined surface, and the end of the limiting elastic pin 57 near the rotating mechanism is also provided with an inclined surface, the limiting elastic pin 57 will move along the inclined surface of the slide 56 to the upper surface of the slide 56, and then enter the pin hole of the slide 56.

[0032] Because the lifting cylinder 4 has moved upward a certain distance, the positioning stage 53 will not collide with the end of the limiting elastic pin 57. Meanwhile, within the range of cam 7 rotating to 170 to 180 degrees, that is, during the lifting and lowering of the target plate shaft 2, because the width of the target plate 21 is smaller than the diameter of the target plate shaft 2, when the target plate shaft 2 rotates 170 degrees, the high-temperature steam flowing in the pipe 1 cannot blow onto the target plate 21 on the target plate shaft 2, effectively ensuring detection accuracy.

[0033] A positioning platform 53 is fixedly connected to the lifting mechanism. The positioning platform 53 is correspondingly set with the movable end of the limiting elastic pin 57. The end of the limiting elastic pin 57 is symmetrically provided with an inclined surface along the length direction of the slide table 56. The upper part of the slide table 56 near the lifting mechanism is provided with an inclined surface, and the inclined section of the limiting elastic pin 57 is set below the pin hole of the slide table 56. This structure can ensure that the limiting elastic pin 57 will not unlock and restrict the slide table 56 in the normal locked state. The inclined surface of the slide table 56 is provided to facilitate the restoration of the locking of the slide table 56 when the limiting platform 55 moves.

[0034] In this embodiment, each guide rail 51 has a first guide groove 531 and a second guide groove 532 on its symmetrical surface. A limiting platform 55 is slidably disposed between the two first guide grooves 531. A first guide rod is fixedly connected within the first guide groove 531 along its length. The limiting platform 55 has a through hole for the first guide rod to pass through. A first spring is fitted onto the first guide rod, with one end fixedly connected to the limiting platform 55 and the other end fixedly connected to the end of the first guide groove 531 near the lifting mechanism. A slide 56 is slidably disposed between the two second guide grooves 532. A second guide rod is fixedly connected within the second guide groove 532 along its length. The slide 56 has a through hole for the second guide rod to pass through. A second spring is fitted onto the second guide rod, with one end fixedly connected to the slide 56 and the other end fixedly connected to the end of the second guide groove 532 near the lifting mechanism. After operation, the limiting platform 55 is reset by the elastic restoring force of the first spring, and the slide 56 is reset by the elastic restoring force of the second spring.

[0035] In this embodiment, the rotating mechanism includes a positioning cylinder 6, a connecting shaft 25, and a motor 9. The connecting shaft 25 is slidably inserted into the positioning cylinder 6, and its top end is fixedly connected to the bottom end of the relay component. A worm gear 92 is coaxially sleeved on the connecting shaft 25, and the worm gear 92 is rotatably mounted on the top end of the positioning cylinder 6. The worm gear 92 meshes with a worm 91, which is connected to the motor 9 via a transmission connection. The motor 9 is fixedly connected to the frame 3 via a bracket 8. A guide key is provided along the axis of the connecting shaft 25, and the worm gear 92 has a keyway that mates with the guide key. The axial length of the guide key is greater than the thickness of the worm gear 92, and the guide key and the keyway form a sliding fit connection. The motor 9 is electrically connected to the lifting mechanism. This structure allows the connecting shaft 25 to maintain rotational power transmission with the worm gear 92 while rising and falling with the target plate shaft 2.

[0036] In this embodiment, a resilient start pin 10 is fixedly connected to the bracket 8. The resilient start pin 10 corresponds to the notch at the end of the limiting semi-ring 54 away from the lifting mechanism. The resilient start pin 10 is electrically connected to the motor 9. The resilient start pin 10 is linked to the switch of the motor 9. Two copper plates can be set at the pressing end of the resilient start pin 10, i.e., the end away from the lifting mechanism. The two copper plates are electrically connected to the switch of the motor 9. When the resilient start pin 10 is pressed, the two copper plates are in contact, the circuit is connected, the switch of the motor 9 is turned on, and the motor 9 starts. The running time of the motor 9 can be adjusted by a delay circuit. In addition, the motor 9 is electrically connected to the lifting cylinder 4. It can be set to automatically cut off the power after the lifting cylinder 4 retracts and the motor 9 runs for a certain period of time.

[0037] In addition, it can be set to push the push table 5 upward a certain distance and then close it after the lifting mechanism is reset. This structure can prevent the end of the limit elastic pin 57 of the limit table 55 in the initial stage from being resisted and collided by the positioning table 53, thereby preventing the slide table 56 from being released from the limit elastic pin 57 and resetting prematurely.

[0038] The cylinder elastic pressing pin 52, the spring-loaded pin-type limiting pin 24, the elastic starting pin 10, and the limiting elastic pin 57 are all spring-loaded pin mechanisms. When pressed, the pin retracts and the spring is compressed; when no longer pressed, the spring resets and drives the pin to move outward.

[0039] The initial working position of this device is as follows: the roller 551 abuts against the proximal end of the cam 7, and the spring-loaded pin-type limit pin 24 is inserted into the notch at the end of the two limit half-rings 54 away from the lifting mechanism. During operation, pressing the elastic start pin 10 pushes the spring-loaded pin-type limiting pin 24 inward, inserting it into the groove 231 of the lower turntable 23. The elastic start pin 10 can be used in conjunction with a linear drive mechanism to achieve automated operation. For example, the elastic start pin 10 can be used with a small cylinder, with a pressure sensor installed at the extended end of the small cylinder. The small cylinder is activated to press the spring-loaded pin-type limiting pin 24 inward, and the small cylinder is electrically connected to the motor 9. When the small cylinder extends, the motor 9 starts synchronously. When the spring-loaded pin-type limiting pin 24 disengages from the small cylinder, that is, when the spring-loaded pin-type limiting pin 24 enters the limiting half-ring 54 and rotates back to the initial position, the spring-loaded pin-type limiting pin 24 will push against the extended end of the small cylinder, causing the cylinder to retract, and the motor 9 will stop running.

[0040] Simultaneously pressing the elastic start pin 10 triggers the motor 9 to start. The motor 9 drives the worm gear 91 to rotate the worm wheel 92, which in turn rotates the connecting shaft 25. The connecting shaft 25 then rotates the lower turntable 23. The lower turntable 23, through the engagement of the spring-loaded pin-type limit pin 24 and the groove 231, drives the upper rotating sleeve 22 to rotate. The upper rotating sleeve 22 then rotates the target plate shaft 2, which in turn rotates the cam 7. The cam 7 abuts against the roller 551, thereby pushing the slide 56 and the limit platform 55 towards the push platform 5. Simultaneously, the baffle 561 disengages from the notch on the side of the two limit semi-rings 54 that is close to the lifting mechanism.

[0041] When the target plate shaft 2 rotates 180 degrees, that is, when the roller 551 abuts against the distal end of the cam 7, the pin of the spring-loaded pin-type limit pin 24 is pushed outward by the spring reset, thereby disengaging from the groove 231 and inserting into the notch on the side of the two limit half-rings 54 facing the lifting cylinder 4. The upper rotating sleeve 22 is disengaged from the lower rotating platform 23. At this time, the motor 9 drives the connecting shaft 25 to rotate, but the connecting shaft 25 can no longer drive the target plate shaft 2 to rotate. At the same time, the limit platform 55 abuts against the push platform 5. The compression length of the cylinder elastic pressing pin 52 can be set according to the actual situation. There is no need for forced abutment. The limit platform 55 pushes the cylinder elastic pressing pin 52 into the push platform 5, thereby triggering the contact pneumatic switch. The lifting end of the lifting cylinder 4 begins to push the push platform 5 to rise. The rise of the push platform 5 drives the linkage mechanism and the target plate shaft 2 to rise synchronously, realizing the action logic of the target plate shaft 2 first rotating 180 degrees and then rising. This action logic allows the target plate shaft 2 to avoid being struck by particulate impurities mixed in with the high-temperature steam inside the pipe 1, ensuring the accuracy of the detection.

[0042] After a certain period of time and the replacement of the target plate 21 is completed, the lifting cylinder 4 pulls the push table 5 down to reset. The push table 5 drives the linkage mechanism and the target plate shaft 2 to reset synchronously. When the push table 5 descends to the point where the limit elastic pin 57 abuts against the positioning table 53, because the end of the limit elastic pin 57 is symmetrically provided with an inclined surface along the length of the slide table 56, and the pin is pressed into the corresponding pin hole of the slide table 56, the second spring continuously provides elastic force to the slide table 56 to reset. Therefore, the limit elastic pin 57 can no longer lock the slide table 56, so that the slide table 56 moves towards the limit half ring 54 until the baffle 561 of the slide table 56 is inserted into the notch of the two limit half rings 54 near the lifting mechanism. The baffle 561 presses the spring-loaded pin-type limit pin 24 into the groove 231 of the lower turntable 23, and the lower turntable 23 drives the upper rotating sleeve 22 to rotate again.

[0043] The spring-loaded pin-type limiting pin 24 slides along the inner wall of the limiting half-ring 54. At the same time, the target plate shaft 2 drives the cam 7 to rotate, and the limiting platform 55 is pushed back by the first spring, with the roller 551 always abutting against the cam 7. When the limiting platform 55 disengages from the push platform 5, that is, when the cylinder elastically presses the pin 52 and disengages from the pneumatic switch, the lifting cylinder 4 stops descending until the target plate shaft 2 rotates 180 degrees, at which point the spring-loaded pin-type limiting pin 24 disengages from the limiting half-ring 54 and re-inserts into the notches of the two limiting half-rings 54 in the initial position.

[0044] During the reset process, due to the inclined surface of the lower end of the limiting elastic pin 57 and the inclined surface of the slide 56 near the lifting mechanism, the limiting elastic pin 57 can move along the inclined surface of the slide 56 to the upper end surface of the slide 56, and then move along the upper end surface of the slide 56 to the pin hole of the slide 56. The spring of the limiting elastic pin 57 resets, inserting the pin into the pin hole of the slide 56, thus locking the slide 56 and ensuring that the slide 56 and the limiting platform 55 can move synchronously. Because the lifting cylinder 4 is electrically connected to the motor 9, when the lifting cylinder 4 stops, the motor 9 continues to run for a certain period of time until the entire device is reset before stopping. After the entire device is reset, the spring-loaded pin-type limiting pin 24 is not inserted into the groove 231, so the continued operation of the motor 9 will not drive the target plate shaft 2 to rotate.

[0045] This invention also discloses an automatic target plate replacement method, which utilizes the automatic target plate replacement device described above for easy target plate replacement, and specifically includes the following steps: S1. The motor 9 drives the rotating mechanism to rotate the target plate shaft 2 by 180°. The cam 7 on the target plate shaft 2 rotates synchronously, pushing the tangential component to slide along the guide rail 51 of the guide component towards the push platform 5 of the lifting mechanism, triggering the lifting cylinder 4 to start. S2, the lifting cylinder 4 pushes the target plate shaft 2 upward through the push table 5, the spring pin type limit pin 24 of the relay component disengages from the groove 231 of the lower turntable 23, and the relay component stops transmitting rotational power to the target plate shaft 2. S3. After the target plate 21 is replaced, the lifting cylinder 4 pulls the target plate shaft 2 downward to reset, and the relay component resumes transmitting rotational power to the target plate shaft 2. S4, cam 7 returns to its original position as the target plate shaft 2 rotates, and the tangential assembly returns to its initial position along the guide rail 51. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic target plate changer for easy target plate replacement, comprising a target plate shaft (2) and a pipe (1) for supporting the target plate shaft (2), wherein the target plate shaft (2) is provided with a target plate (21) positioning groove, characterized in that, A frame (3) is fixedly connected directly below the pipe (1). A rotating mechanism is installed on the frame (3). The power output end of the rotating mechanism is connected to the bottom end of the target plate shaft (2). A lifting mechanism is installed on one side of the rotating mechanism. A relay component is provided between the power output end of the rotating mechanism and the target plate shaft (2). The relay component can selectively transmit the power of the rotating mechanism to the target plate shaft (2). A cam (7) is fixedly connected on the target plate shaft (2). A guide component is connected between the lifting end of the lifting mechanism and the relay component. A tangential component is slidably fitted on the guide component. The tangential component abuts against the circumference of the cam (7). When the target plate shaft (2) rotates 180 degrees, the tangential component abuts against the lifting end of the lifting mechanism. When the lifting mechanism pushes the target plate shaft (2) upward, the relay component stops transmitting the power of the rotating mechanism to the target plate shaft (2). When the lifting mechanism pulls the target plate shaft (2) downward to reset, the relay component resumes transmitting the power of the rotating mechanism to the target plate shaft (2).

2. The automatic target plate changer for easy target plate replacement according to claim 1, characterized in that: The lifting mechanism includes a lifting cylinder (4), and a hollow push platform (5) is fixedly connected to the movable end of the lifting cylinder (4). A pneumatic switch is installed inside the push platform (5). A cylinder elastic pressing pin (52) is inserted into the side of the push platform (5) facing the lifting mechanism. The cylinder elastic pressing pin (52) cooperates with the pneumatic switch and can open and close the lifting cylinder (4). The push platform (5) is fixedly connected to the guide assembly.

3. An automatic target plate changer for easy target plate replacement according to claim 1, characterized in that: The guide assembly includes two symmetrically arranged guide rails (51), one end of each guide rail (51) being fixedly connected to the lifting end of the lifting mechanism.

4. An automatic target plate changer for easy target plate replacement according to claim 3, characterized in that: The relay assembly includes an upper rotating sleeve (22), a lower rotating platform (23), and two limiting semi-rings (54). The two limiting half rings (54) are fixedly connected to the symmetrical plane of the guide rail (51) on the corresponding side. The opening direction of the two limiting half rings (54) is horizontally facing the axis of the rotating mechanism. Two notches are formed between the two ends of the two limiting half rings (54). The lower turntable (23) is coaxially fixedly connected to the power output end of the rotating mechanism, and multiple grooves (231) are equally spaced on the periphery of the lower turntable (23). The upper rotating sleeve (22) is coaxially fixedly connected to the bottom end of the target plate shaft (2) and sleeved on the outside of the lower rotating platform (23). A spring-loaded pin-type limiting pin (24) is inserted on one side of the upper rotating sleeve (22). The movable end of the spring-loaded pin-type limiting pin (24) can be selectively inserted between the notches of the two limiting half rings (54). When the outer end of the movable end of the spring-loaded pin-type limiting pin (24) slides against the inner wall of the limiting half ring (54), the inner end of the movable end of the spring-loaded pin-type limiting pin (24) is inserted into the groove (231) of the lower rotating platform (23). The cam (7) is fixedly connected to the target plate shaft (2).

5. An automatic target plate changer for easy target plate replacement according to claim 4, characterized in that: The tangential assembly includes a limiting platform (55) and a sliding platform (56), both of which are slidably disposed between two guide rails (51), and the limiting platform (55) is disposed above the sliding platform (56); The top of the limiting platform (55) is provided with a limiting elastic pin (57), the movable end of the limiting elastic pin (57) is set downward, and passes through the limiting platform (55) and the slide (56) in sequence. The limiting platform (55) is rotatably connected to a roller (551) on one side facing the rotating mechanism, and the roller (551) slides against the circumferential side of the cam (7). A baffle (561) is fixedly connected to the side of the slide (56) facing the rotating mechanism. When the roller (551) abuts against the proximal end of the cam (7), the baffle (561) is inserted between the notches of the two limiting half rings (54) near the side of the slide (56).

6. An automatic target plate changer for easy target plate replacement according to claim 5, characterized in that: The width of the slide (56) is smaller than the width of the limiting platform (55); a positioning platform (53) is fixedly connected to the lifting mechanism, and the positioning platform (53) is correspondingly set with the movable end of the limiting elastic pin (57); the end of the limiting elastic pin (57) is provided with two inclined surfaces along the moving direction of the slide (56); an inclined surface is provided on the upper part of the slide (56) near the lifting mechanism.

7. An automatic target plate changer for easy target plate replacement according to claim 5, characterized in that: Each of the guide rails (51) has a first guide groove (531) and a second guide groove (532) on its symmetrical surface; The limiting platform (55) is slidably disposed between two first guide grooves (531). A first guide rod is fixedly connected in the first guide groove (531) along its length direction. The limiting platform (55) has a through hole for the first guide rod to pass through. A first spring is sleeved on the first guide rod. One end of the first spring is fixedly connected to the limiting platform (55), and the other end of the first spring is fixedly connected to the end of the first guide groove (531) near the lifting mechanism. The slide (56) is slidably disposed between two second guide grooves (532). A second guide rod is fixedly connected in the second guide groove (532) along its length direction. A through hole is provided on the slide (56) for the second guide rod to pass through. A second spring is sleeved on the second guide rod. One end of the second spring is fixedly connected to the slide (56), and the other end of the second spring is fixedly connected to the end of the second guide groove (532) near the lifting mechanism.

8. An automatic target plate changer for easy target plate replacement according to claim 4, characterized in that: The rotating mechanism includes a positioning cylinder (6), a connecting shaft (25), and a motor (9); The connecting shaft (25) is slidably inserted into the positioning cylinder (6), and the top end of the connecting shaft (25) is fixedly connected to the bottom end of the relay component; a worm gear (92) is coaxially sleeved on the connecting shaft (25), and the worm gear (92) is rotatably connected to the top end of the positioning cylinder (6); the worm gear (92) is meshed with a worm (91), and the worm (91) is connected to the output end of the motor (9) for transmission, and the motor (9) is fixedly connected to the frame (3) through the bracket (8); A guide key is provided on the connecting shaft (25) along its axis. A keyway is provided on the worm gear (92) to cooperate with the guide key. The axial length of the guide key is greater than the thickness of the worm gear (92), and the guide key and the keyway are slidably connected. The motor (9) is electrically connected to the lifting mechanism.

9. An automatic target plate changer for easy target plate replacement according to claim 8, characterized in that: An elastic start pin (10) is fixedly connected to the bracket (8). The elastic start pin (10) is set to correspond to the notch at the end of the two limiting half rings (54) away from the lifting mechanism. The elastic start pin (10) is electrically connected to the motor (9).

10. A method for replacing the target plate in an automatic target plate device, characterized in that, The automatic target plate maker for easy target plate replacement as described in any one of claims 1 to 9 specifically includes the following steps: S1. The motor (9) drives the rotating mechanism to rotate the target plate shaft (2) by 180°. The cam (7) on the target plate shaft (2) rotates synchronously, pushing the tangential component to slide along the guide rail (51) of the guide component to the push platform (5) of the lifting mechanism, triggering the lifting cylinder (4) to start. S2, the lifting cylinder (4) pushes the target plate shaft (2) upward through the pusher (5), the spring pin type limit pin (24) of the relay component disengages from the groove (231) of the lower turntable (23), and the relay component stops transmitting rotational power to the target plate shaft (2). S3. After the target plate (21) is replaced, the lifting cylinder (4) pulls the target plate shaft (2) downward to reset, and the relay component resumes transmitting rotational power to the target plate shaft (2). S4, the cam (7) rotates and resets with the target plate shaft (2), and the tangential assembly returns to its initial position along the guide rail (51).

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