An automatic positioning device for reactor heads

Abstract

This application discloses an automatic positioning device for reactor heads, comprising a first positioning frame and a second positioning frame forming a cross-shaped frame, used to be mounted on the top of a water tank, with the reactor head to be processed placed in the middle of the cross-shaped frame. The first positioning frame has telescopic and fixed limiting plates at both ends, controlled by a main drive component; the second positioning frame has auxiliary limiting plates at both ends, controlled by an auxiliary drive component. During positioning, the limiting plates converge and abut against the outer periphery of the head to ensure center alignment. After processing, the telescopic limiting plates retract and then extend inwards, and the main drive component drags the head to the edge of the water tank. This achieves automatic positioning and handling of the reactor head, improving positioning accuracy and efficiency.

Description

Technical Field

[0001] This application relates to the field of machining, and in particular to an automatic positioning device for the head of a reaction vessel. Background Technology

[0002] In the field of chemical equipment manufacturing, reactor heads are key components of pressure vessels, and their machining accuracy directly affects the sealing performance and service life of the equipment. Traditional manual positioning methods for drilling holes in reactor heads are no longer sufficient to meet the required precision.

[0003] Currently, plasma cutting is the most common process used in the industry for drilling. During the process, the plasma cutting machine first needs to locate the origin point of the reactor head before it can automatically cut. Existing technologies mostly use a mounting bracket to hold the reactor head, then place the bracket above the center of a water tank. Cooling is required during cutting, and the coolant flows into the water tank for recycling. However, due to the lack of a positioning system, the origin point must be re-located every time a different head is processed, resulting in low production efficiency. Furthermore, it is inconvenient to remove the reactor head from the center of the water tank after processing, indicating room for improvement. Summary of the Invention

[0004] To facilitate the positioning of the reactor head before processing and the removal of the reactor head after processing, this application provides an automatic positioning device for reactor heads.

[0005] The automatic positioning device for reactor heads provided in this application adopts the following technical solution: An automatic positioning device for reactor heads includes a first positioning frame and a second positioning frame. The first and second positioning frames are cross-shaped and are used to mount on the top of a water tank. The middle part of the cross frame is used to place the reactor head to be processed. The two ends of the first positioning frame extend to the edge of the water tank. One end of the first positioning frame is provided with a telescopic limiting plate, and the other end is provided with a fixed limiting plate. The telescopic and fixed limiting plates are arranged opposite to each other. The first positioning frame is provided with a main driving component for driving the telescopic and fixed limiting plates to move away from or towards each other. The two ends of the second positioning frame are respectively provided with auxiliary limiting plates. The second positioning frame is provided with an auxiliary driving component for driving the auxiliary limiting plates to move away from or towards each other. When positioning the reactor head, the telescopic limiting plate, the fixed limiting plate, and two auxiliary limiting plates are simultaneously brought together and abut against the outer periphery of the reactor head so that the center of the reactor head coincides with the center of the cross frame. After the reactor is processed, the telescopic limiting plate is hidden inside the first positioning frame by retraction, and the telescopic limiting plate is driven by the main drive to move to the inside of the reactor head. The telescopic limiting plate extends and abuts against the inner circumference of the reactor head, and the main drive drives the telescopic limiting plate to move away from the center of the cross, so as to drag the reactor head to the edge of the pool.

[0006] By adopting the above technical solution, the cross-frame structure provides a stable support benchmark for the reactor head and spans the water tank, extending the head placement and removal area to the edge of the water tank, greatly improving operability. By controlling the coordinated movement of two sets of limiting plates through the main and auxiliary drive components, heads of different sizes can be quickly and automatically and accurately positioned at the center of the cross-frame, ensuring consistency of the origin point for subsequent cutting and processing, and improving processing accuracy and production efficiency. Furthermore, the telescopic limiting plate has two working modes: in positioning mode, it works in conjunction with the fixed and auxiliary limiting plates to clamp the head from the outside; in removal mode, it can retract and move to the inside of the head before extending again, hooking the head from the inside and using the main drive component to drag it as a whole to the edge of the water tank. This solves the problem of difficulty in removing the head when it is located in the center of the water tank in traditional devices, achieving integration and automation of positioning and removal functions.

[0007] Preferably, the surface of the first positioning frame is provided with a first sliding groove, which extends along the length direction of the first positioning frame, and the telescopic limiting plate and the fixed limiting plate are both slidably connected in the first sliding groove.

[0008] By adopting the above technical solution, the first slide provides a precise linear guide track for the telescopic and fixed limiting plates, ensuring that their trajectories are stable and do not deviate during movement, thereby guaranteeing the accuracy and repeatability of clamping and positioning. At the same time, embedding the moving parts or arranging them along the slide also makes the device structure more compact and neat.

[0009] Preferably, the telescopic limiting plate includes a movable plate unit slidably connected in the first slide groove, a telescopic plate unit slidably connected vertically to the movable plate unit, and a telescopic drive member for driving the telescopic plate unit to move up and down.

[0010] By adopting the above technical solution, the telescopic limiting plate is modularly designed into a moving plate unit and a telescopic plate unit. The moving plate unit is responsible for moving horizontally along the first sliding groove under the action of the driving component to achieve the functions of clamping, centering or dragging the end cap. The telescopic driving component controls the lifting and lowering of the telescopic plate unit, so that it can extend when it is necessary to clamp or drag the end cap, or retract when it is necessary to avoid obstacles, realizing the rapid switching between the two functional modes of "outer clamping" and "inner hooking" of the reactor end cap.

[0011] Preferably, the top of the movable plate unit is provided with a vertical groove for the telescopic plate unit to slide up and down. The telescopic plate unit is a magnetically attracted component. The telescopic drive component includes an electromagnet and a vertical spring disposed at the bottom of the vertical groove. The vertical spring is used to drive the telescopic plate unit to extend upward out of the vertical groove. When the electromagnet is energized, the telescopic plate unit overcomes the elastic force of the vertical spring and retracts into the vertical groove.

[0012] By employing the above technical solution, the vertical spring provides a constant extension force, ensuring that the telescopic plate unit is in the extended and positioned state by default. The magnetic attraction force generated by the energized electromagnet overcomes the spring force, allowing the telescopic plate unit to reliably retract into the vertical slot, thereby achieving rapid switching of working states. This structure eliminates the need for complex mechanical transmissions, and the telescopic movement can be precisely controlled using electrical control signals.

[0013] Preferably, the main driving component includes a first guide rod, a first bidirectional screw, and a first motor for driving the first bidirectional screw to rotate. The two ends of the first bidirectional screw extend along the length direction of the first slide groove and are threaded through the lower part of the moving plate unit and the fixed limiting plate, respectively. The first motor is provided with a first positioning frame and the conveying shaft of the first motor is coaxially and fixedly connected to the first bidirectional screw. The first guide rod is parallel to the first bidirectional screw and passes through the lower part of the moving plate unit and the fixed limiting plate.

[0014] By adopting the above technical solution, the first motor drives the first bidirectional screw to rotate, and the rotational motion is converted into linear motion of the moving plate unit and the fixed limiting plate along the first guide rod in opposite directions or in opposite directions through threaded transmission. The design of the bidirectional screw ensures that a single motor can synchronously drive the two limiting plates to move simultaneously, resulting in a compact structure, high transmission efficiency, and ensuring the synchronicity and symmetry of the movement of the two plates.

[0015] Preferably, the second positioning frame has a second sliding groove on its surface, which extends along the length of the second positioning frame. The auxiliary limiting plate is slidably connected within the second sliding groove. The auxiliary driving component includes a second guide rod, a second bidirectional screw, and a second motor for driving the second bidirectional screw to rotate. Both ends of the second bidirectional screw extend along the length of the second sliding groove and are threaded through the two auxiliary limiting plates respectively. The second motor is located at the second positioning frame, and the conveying shaft of the second motor is coaxially and fixedly connected to the second bidirectional screw. The second guide rod is parallel to the second bidirectional screw and passes through the two auxiliary limiting plates. The first bidirectional screw and the second bidirectional screw are staggered vertically.

[0016] By adopting the above technical solution, the auxiliary limiting plate and its drive mechanism on the second positioning frame use a linear drive scheme similar to but independent of the first positioning frame, ensuring that the two auxiliary limiting plates in the second direction can also move synchronously and accurately, thereby cooperating with the limiting plate in the first direction to complete the four-way automatic centering clamping of the end cap. The first bidirectional screw and the second bidirectional screw are staggered vertically, effectively avoiding spatial interference between the two layers of transmission mechanisms in the central area of ​​the cross frame, making the structural layout more reasonable and ensuring the stability and reliability of the device.

[0017] Preferably, the first groove is provided with a first bellows cover for covering the first bidirectional screw, and the second groove is provided with a second bellows cover for covering the second bidirectional screw.

[0018] By adopting the above technical solution, the bellows cover can extend and retract with the moving parts to form an effective airtight protection, preventing metal chips, coolant, steam and other pollutants generated during the cutting process from entering the inside of the slide and sticking to or corroding precision transmission components such as the bidirectional screw. This is beneficial to improving the service life of the transmission components and the long-term reliability of the device.

[0019] Preferably, the first positioning frame has a first drainage hole, which is connected to the inner and outer sides of the first slide groove; the second positioning frame has a second drainage hole, which is connected to the inner and outer sides of the second slide groove.

[0020] By adopting the above technical solution, even if a small amount of coolant or condensate still enters the slide under the protection of the bellows cover, it can be drained in time through the drain hole, preventing liquid from accumulating in the sealed slide. This improves the problem of corrosion of transmission components due to long-term immersion in water, ensuring their durability and functional stability in humid environments.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The cross-frame structure provides a stable support benchmark for the reactor head and spans the water pool, extending the head handling area to the edge of the water pool and improving operability; the main drive and auxiliary drive components control the coordinated movement of the limiting plate, which can accurately center and position heads of different sizes at the center of the cross frame, ensuring consistent cutting origin and improving processing accuracy and production efficiency. 2. The telescopic limiting plate has two working modes: positioning and removal. When positioning, it clamps the end cap from the outside with the fixed limiting plate and the auxiliary limiting plate. When removing, it retracts and hooks the end cap from the inside and drags it to the edge of the pool, which solves the problem that the end cap is located in the center of the pool and is difficult to remove in traditional devices. 3. The first and second slides provide precise linear guide tracks for the limiting plate, ensuring stable movement trajectory, guaranteeing clamping positioning accuracy and repeatability, and making the device structure more compact and neat. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an automatic positioning device for reactor heads according to an embodiment of this application.

[0023] Figure 2 This is a top view of an automatic positioning device for reactor head according to an embodiment of this application, with the bellows cover removed.

[0024] Figure 3 This is a schematic diagram showing the state of the telescopic limiting plate and the auxiliary limiting plate in an automatic positioning device for reactor heads according to an embodiment of this application, when they are pressed against the outer periphery of the reactor head.

[0025] Figure 4 This is a schematic diagram showing the state of the telescopic limiting plate abutting against the inner circumference of the reactor head in an automatic positioning device for reactor head according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Water tank; 2. Cross frame; 21. Second positioning frame; 211. Second slide groove; 212. Second drain hole; 22. First positioning frame; 221. First slide groove; 222. First drain hole; 23. Second bellows cover; 24. First bellows cover; 3. Reactor head; 4. Telescopic limiting plate; 41. Moving plate unit; 411. Vertical groove; 42. Telescopic plate unit; 5. Fixed limiting plate; 6. Auxiliary limiting plate; 7. Telescopic drive component; 71. Electromagnet; 72. Spring; 8. Main drive component; 81. First bidirectional screw; 82. First guide rod; 83. First motor; 9. Auxiliary drive component; 91. Second motor; 92. Second bidirectional screw; 93. Second guide rod. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] This application discloses an automatic positioning device for reactor head, referring to... Figure 1 and Figure 2The system includes a first positioning frame 22, a second positioning frame 21, a telescopic limiting plate 4, a fixed limiting plate 5, a main drive component 8, an auxiliary limiting plate 6, and an auxiliary drive component 9. The first positioning frame 22 and the second positioning frame 21 intersect to form a cross frame 2, which is mounted on top of the water tank 1. The reactor head 3 to be processed is placed in the middle of the cross frame 2. The two ends of the first positioning frame 22 extend to the edge of the water tank 1. The telescopic limiting plate 4 and the fixed limiting plate 5 are positioned opposite each other at both ends of the first positioning frame 22, and the main drive component 8 drives them to move away from or towards each other. The auxiliary limiting plate 6 is positioned at both ends of the second positioning frame 21, and the auxiliary drive component 9 drives the two auxiliary limiting plates 6 to move away from or towards each other. The telescopic limiting plate 4 has two working modes: in the positioning mode, it works together with the fixed limiting plate 5 and the auxiliary limiting plate 6 to clamp the end cap from the outside; in the removal mode, it can retract and move to the inside of the end cap and then extend to hook the end cap from the inside, and use the main drive component 8 to drag the end cap as a whole to the edge of the water tank 1, which solves the problem that the end cap is difficult to remove when it is located in the center of the water tank 1 in the traditional device, and realizes the integration and automation of positioning and removal functions.

[0029] Specifically, a first sliding groove 221 is formed on the surface of the first positioning frame 22, extending along the length of the first positioning frame 22. Both the telescopic limiting plate 4 and the fixed limiting plate 5 are slidably connected within the first sliding groove 221. The first sliding groove 221 is a long, narrow groove along the length of the first positioning frame 22, and can be made of stainless steel or aluminum alloy. The telescopic limiting plate 4 and the fixed limiting plate 5 are slidably connected to the first sliding groove 221 via sliders. These sliders can be T-shaped sliders, which can tightly engage with the first sliding groove 221 to ensure sliding stability. The first sliding groove 221 provides a precise linear guide track for the movement of the telescopic limiting plate 4 and the fixed limiting plate 5, ensuring stable trajectories during movement and preventing deviation, thereby improving the accuracy and repeatability of clamping and positioning.

[0030] Reference Figure 3 and Figure 4 Specifically, the telescopic limiting plate 4 includes a movable plate unit 41, a telescopic plate unit 42, and a telescopic drive component 7.

[0031] The movable plate unit 41 is slidably connected within the first slide groove 221. Its shape can be cuboid with a smooth surface to allow for smooth sliding within the first slide groove 221. The movable plate unit 41 can be made of carbon steel, possessing high strength and hardness. The movable plate unit 41 moves along the first slide groove 221 under the drive of the first motor 83 through a threaded engagement with the first bidirectional screw 81.

[0032] The telescopic plate unit 42 is vertically slidably connected to the movable plate unit 41. It is plate-shaped with moderate thickness, allowing it to make good contact with the inner or outer circumference of the reactor head 3. The telescopic plate unit 42 achieves its telescopic function by sliding up and down within the vertical groove 411 opened at the top of the movable plate unit 41.

[0033] The telescopic plate unit 42 is a magnetically attracted component. The telescopic drive component 7 includes an electromagnet 71 and a vertical spring 72 disposed at the bottom of the vertical slot 411. When the electromagnet 71 is energized, it generates magnetic force, overcoming the elastic force of the vertical spring 72, causing the telescopic plate unit 42 to retract into the vertical slot 411. When de-energized, the elastic force of the vertical spring 72 causes the telescopic plate unit 42 to extend upwards out of the vertical slot 411. The electromagnet 71 can be a DC electromagnet 71, which has strong attraction and stable performance. The vertical spring 72 can be a helical spring 72, and its elastic coefficient is selected according to actual needs. The telescopic drive component 7 can precisely control the telescopic movement of the telescopic plate unit 42 using electrical control signals, eliminating the need for complex mechanical transmissions and improving the automation level and ease of operation of the device.

[0034] The main drive component 8 includes a first guide rod 82, a first bidirectional screw 81, and a first motor 83.

[0035] The first guide rod 82 is parallel to the first bidirectional screw 81 and passes through the lower part of the movable plate unit 41 and the fixed limiting plate 5. The first guide rod 82 can be a cylindrical rod with a polished surface to reduce friction. The first guide rod 82 provides guidance for the movement of the movable plate unit 41 and the fixed limiting plate 5, ensuring that the movable plate unit 41 and the fixed limiting plate 5 move in a straight line.

[0036] The first bidirectional screw 81 extends along the length of the first groove 221 at both ends and is threaded through the lower part of the movable plate unit 41 and the fixed limiting plate 5, respectively. The first motor 83 is located at the end of the first positioning frame 22, and its conveying shaft is coaxially and fixedly connected to the first bidirectional screw 81. The first motor 83 can be a servo motor, capable of precisely controlling the speed and direction. The first motor 83 drives the first bidirectional screw 81 to rotate, and through threaded transmission, the rotational motion is converted into linear motion of the movable plate unit 41 and the fixed limiting plate 5 along the first guide rod 82, either towards or away from each other. The design of the bidirectional screw ensures that a single motor can synchronously drive the two limiting plates to move simultaneously, resulting in a compact structure, high transmission efficiency, and ensuring the synchronicity and symmetry of the movement of the two plates.

[0037] The second positioning frame 21 has a second sliding groove 211 on its surface. The second sliding groove 211 extends along the length of the second positioning frame 21, and the auxiliary limiting plate 6 is slidably connected in the second sliding groove 211. Its structure and principle are similar to the first sliding groove 221, and it also provides guidance for the movement of the auxiliary limiting plate 6.

[0038] The auxiliary drive component 9 includes a second guide rod 93, a second bidirectional screw 92, and a second motor 91.

[0039] The second guide rod 93 is parallel to the second bidirectional screw 92 and passes through the two auxiliary limiting plates 6. Its function and structure are similar to the first guide rod 82, providing guidance for the movement of the auxiliary limiting plates 6. Both ends of the second bidirectional screw 92 extend along the length of the second slide groove 211 and are threaded through the two auxiliary limiting plates 6 respectively. The second motor 91 is located at the second positioning frame 21, and its conveying shaft is coaxially and fixedly connected to the second bidirectional screw 92. The second motor 91 can also be a servo motor to precisely control the movement of the auxiliary limiting plates 6. The auxiliary limiting plates 6 and their drive mechanism on the second positioning frame 21 adopt a linear drive scheme similar to but independent of the first positioning frame 22, ensuring that the two auxiliary limiting plates 6 in the second direction can also move synchronously and precisely, thereby cooperating with the limiting plates in the first direction to complete the four-way automatic centering clamping of the end cap. The first bidirectional screw 81 and the second bidirectional screw 92 are staggered vertically, effectively avoiding spatial interference between the two layers of transmission mechanisms in the central area of ​​the cross frame 2, making the structural layout more reasonable and ensuring the stability and reliability of the device.

[0040] In this embodiment, a first bellows cover 24 for covering the first bidirectional screw 81 is provided in the first slide groove 221, and a second bellows cover 23 for covering the second bidirectional screw 92 is provided in the second slide groove 211. Both the first bellows cover 24 and the second bellows cover 23 are typically made of flexible materials such as rubber or plastic, possessing good elasticity and sealing properties. It can be a multi-layered structure to enhance the protective effect. The bellows cover forms an effective airtight protection within the slide groove, preventing contaminants such as metal shavings, coolant, and steam generated during the cutting process from entering the slide groove. To further reduce the probability of the screw structure coming into contact with water, a first drain hole 222 is provided in the first positioning frame 22, connecting the inner and outer sides of the first slide groove 221; a second drain hole 212 is provided in the second positioning frame 21, connecting the inner and outer sides of the second slide groove 211. The arrangement of the first drain hole 222 and the second drain hole 212 is the same. Taking the first drain hole 222 as an example, there are several first drain holes 222, which are opened at the bottom of the first slide groove 221. The several first drain holes 222 are distributed at intervals along the direction of the first positioning frame 22 to facilitate drainage. When a small amount of coolant or condensate still enters the first slide groove 221 under the protection of the bellows cover, the first drain holes 222 can drain it in time, avoiding the accumulation of liquid in the sealed slide groove, improving the problem of corrosion of transmission components due to long-term immersion in water, and ensuring its durability and functional stability in humid environments.

[0041] When positioning the reactor head 3, the reactor is placed at the end of the first positioning frame 22. The reactor head 3 can be pushed to the center of the cross frame 2 by moving the fixed limiting plate 5 or the telescopic limiting plate 4. If the first motor 83 is started, it drives the first bidirectional screw 81 to rotate. Through threaded transmission, the telescopic limiting plate 4 and the fixed limiting plate 5 move closer together along the first sliding groove 221 under the guidance of the first guide rod 82, so that the reactor head 3 to be processed is positioned in the middle of the cross frame 2. Simultaneously, the second motor 91 is started, driving the second bidirectional screw 92 to rotate. Through threaded transmission, the two auxiliary limiting plates 6 move closer together along the second sliding groove 211 under the guidance of the second guide rod 93. The telescopic limiting plate 4, the fixed limiting plate 5, and the two auxiliary limiting plates 6 simultaneously converge and abut against the outer periphery of the reactor head 3 until the center of the reactor head 3 coincides with the center of the cross frame 2, completing the positioning.

[0042] After the reactor is processed, the electromagnet 71 of the telescopic limiting plate 4 is energized. The electromagnet 71 generates magnetic force to overcome the elastic force of the vertical spring 72, causing the telescopic plate unit 42 to retract into the vertical groove 411, and the telescopic limiting plate 4 to be hidden inside the first positioning frame 22. The first motor 83 is started, which drives the first bidirectional screw 81 to rotate. Through threaded transmission, the telescopic limiting plate 4 moves along the first sliding groove 221 to the inner side of the reactor head 3 under the guidance of the first guide rod 82. Then the power supply to the electromagnet 71 is disconnected, and the elastic force of the vertical spring 72 causes the telescopic plate unit 42 to extend upward out of the vertical groove 411 and abut against the inner circumference of the reactor head 3. The first motor 83 is started again, driving the telescopic limiting plate 4 to move away from the center of the cross frame 2, so as to drag the reactor head 3 to the edge of the pool 1.

[0043] It should be noted that when processing large-diameter reactor heads 3, in order to improve the stability of reactor heads 3 during movement, the width of the first positioning frame 22 can be increased, or support frames can be added on both sides of the first positioning frame 22, thereby supporting the bottom positions on both sides of the reactor heads 3 and reducing the probability of the reactor heads 3 tipping over.

[0044] The implementation principle of this embodiment is as follows: The automatic positioning device for the reactor head 3 in this embodiment provides a stable support benchmark for the reactor head 3 through the cross frame 2 structure, and spans across the water tank 1, allowing the head placement and removal operation area to extend to the edge of the water tank 1, thus improving operability. The main drive component 8 and the auxiliary drive component 9 respectively control the coordinated movement of the two sets of limiting plates, which can quickly and automatically and accurately center and position heads of different sizes at the center of the cross frame 2, ensuring the consistency of the origin point for subsequent cutting and processing, and improving processing accuracy and production efficiency. The telescopic limiting plate 4 has two working modes: positioning and removal, realizing the integration and automation of positioning and removal functions, solving the problem that it is difficult to remove the head when it is located in the center of the water tank 1 in traditional devices. Compared with the existing technology, it has significant improvements and enhancements in positioning accuracy, ease of operation, and production efficiency.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic positioning device for the head of a reaction vessel, characterized in that: The system includes a first positioning frame (22) and a second positioning frame (21). The first positioning frame (22) and the second positioning frame (21) are cross-shaped to form a cross frame (2) and are used to be mounted on the top of the water tank (1). The middle part of the cross frame (2) is used to place the reactor head (3) to be processed. The two ends of the first positioning frame (22) extend to the edge of the water tank (1). One end of the first positioning frame (22) is provided with a telescopic limiting plate (4) and the other end is provided with a fixed limiting plate (5). The telescopic limiting plate (4) and the fixed limiting plate (5) are arranged opposite to each other. The first positioning frame (22) is provided with a main driving component (8) to drive the telescopic limiting plate (4) and the fixed limiting plate (5) to move away from or closer to each other. The two ends of the second positioning frame (21) are respectively provided with auxiliary limiting plates (6). The second positioning frame (21) is provided with an auxiliary driving component (9) to drive the auxiliary limiting plates (6) to move away from or closer to each other. When the reactor head (3) is being positioned, the telescopic limiting plate (4), the fixed limiting plate (5) and the two auxiliary limiting plates (6) are simultaneously brought together and abut against the outer periphery of the reactor head (3) so that the center of the reactor head (3) coincides with the center of the cross frame (2). After the reactor is processed, the telescopic limiting plate (4) is hidden in the first positioning frame (22) by retraction, and the telescopic limiting plate (4) is driven by the main drive component (8) to move to the inside of the reactor head (3). The telescopic limiting plate (4) extends and abuts against the inner circumference of the reactor head (3). The main drive component (8) drives the telescopic limiting plate (4) to move away from the center of the cross frame (2) so as to drag the reactor head (3) to the edge of the pool (1). The first positioning frame (22) has a first sliding groove (221) on its surface. The first sliding groove (221) extends along the length of the first positioning frame (22). The telescopic limiting plate (4) and the fixed limiting plate (5) are slidably connected in the first sliding groove (221). The telescopic limiting plate (4) includes a movable plate unit (41) slidably connected in the first slide groove (221), a telescopic plate unit (42) vertically slidably connected to the movable plate unit (41), and a telescopic drive member (7) for driving the telescopic plate unit (42) to move up and down. The top of the movable plate unit (41) is provided with a vertical groove (411) for the telescopic plate unit (42) to slide up and down. The telescopic plate unit (42) is a magnetically attracted component. The telescopic drive component (7) includes an electromagnet (71) and a vertical spring (72) disposed at the bottom of the vertical groove (411). The vertical spring (72) is used to drive the telescopic plate unit (42) to extend upward out of the vertical groove (411). When the electromagnet (71) is energized, the telescopic plate unit (42) overcomes the elastic force of the vertical spring (72) and retracts into the vertical groove (411). The first positioning frame (22) has a first drainage hole (222) which is connected to the inner and outer sides of the first slide groove (221); the second positioning frame (21) has a second drainage hole (212) which is connected to the inner and outer sides of the second slide groove (211).

2. The automatic positioning device for reactor head according to claim 1, characterized in that: The main drive component (8) includes a first guide rod (82), a first bidirectional screw (81), and a first motor (83) for driving the first bidirectional screw (81) to rotate. The two ends of the first bidirectional screw (81) extend along the length direction of the first slide groove (221) and are threaded through the lower part of the moving plate unit (41) and the fixed limiting plate (5), respectively. The first motor (83) is located at the first positioning frame (22), and the conveying shaft of the first motor (83) is coaxially and fixedly connected to the first bidirectional screw (81). The first guide rod (82) is parallel to the first bidirectional screw (81) and passes through the lower part of the moving plate unit (41) and the fixed limiting plate (5).

3. The automatic positioning device for reactor head according to claim 2, characterized in that: The second positioning frame (21) has a second sliding groove (211) on its surface. The second sliding groove (211) extends along the length of the second positioning frame (21). The auxiliary limiting plate (6) is slidably connected in the second sliding groove (211). The auxiliary driving component (9) includes a second guide rod (93), a second bidirectional screw (92), and a second motor (91) for driving the second bidirectional screw (92) to rotate. The two ends of the second bidirectional screw (92) extend along the length of the second sliding groove (211) and are threaded through the two auxiliary limiting plates (6) respectively. The second motor (91) is located at the second positioning frame (21), and the conveying shaft of the second motor (91) is coaxially fixedly connected with the second bidirectional screw (92). The second guide rod (93) is parallel to the second bidirectional screw (92) and passes through the two auxiliary limiting plates (6). The first bidirectional screw (81) and the second bidirectional screw (92) are staggered vertically.

4. The automatic positioning device for reactor head according to claim 3, characterized in that: The first groove (221) is provided with a first accordion cover (24) for covering the first bidirectional screw (81), and the second groove (211) is provided with a second accordion cover (23) for covering the second bidirectional screw (92).

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