Lifting method in quenching treatment of connecting pipe forge piece for pressure container

Abstract

The invention provides a hoisting method used in quenching treatment of a pressure vessel connecting pipe forge piece, and relates to the technical field of quenching hoisting equipment. Two U-shaped supporting frames are symmetrically welded to the bottom sides of two long side rods of a bottom fence, and a driving assembly is rotationally installed in the center of the space between the two U-shaped supporting frames; the whole driving assembly is jointly composed of a center rotating shaft, two gears and a positioning wheel, the two gears and the positioning wheel are installed on the center rotating shaft, the gear on the upper side is in meshing transmission with the two racks on the upper side, and the gear on the lower side is in meshing transmission with the two racks on the lower side. And horizontal side shafts at the tail ends of the four U-shaped transmission frames are correspondingly matched with the four vertical strip frames in a penetrating and sliding manner. Under the condition that the four racks and the four vertical strip frames are in transmission connection and can be synchronously driven, all the racks and the vertical strip frames can be driven to slide together in a reciprocating mode and all the side fences are controlled to be synchronously opened and closed when any side fence is turned over inwards and outwards, and compared with the prior art, the vertical loading and unloading efficiency of the connecting pipe forgings can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of quenching hoisting equipment, in particular to a hoisting method in the quenching treatment of a pipe forging for a pressure vessel. Background Art

[0002] In the manufacturing process of pressure vessels, the pipe forging is one of the key components. Its heat treatment, especially quenching, is crucial to ensure the mechanical properties of the final product. In the traditional quenching process, the lifting and loading and unloading of pipe forgings face many challenges, especially how to efficiently and safely put and take out forgings weighing hundreds or even thousands of kilograms into and out of the quenching pool, which has become a key issue in improving production efficiency and ensuring operational safety.

[0003] In the existing quenching lifting equipment, the multiple side rails located at different positions on the hanging basket for intercepting and limiting the forgings are generally fixed and statically installed. The fixed and statically installed side rails will cause obstacles to the forgings during loading and unloading. The forgings need to be lifted and lowered significantly to cross the side rails for normal loading and unloading inside the hanging basket, which is troublesome and laborious to operate. In addition, although all the side rails on some hanging baskets are configured as movable switches, all the side rails are independently configured separately from each other, and there is no mechanism for transmitting driving force between them, so they cannot be driven to open and close synchronously. As a result, before and after each loading and unloading of forgings, all the side rails need to be driven to open and close step by step, which makes the operation and use still cumbersome and inconvenient. Summary of the invention

[0004] In view of this, the present invention provides a lifting method for the quenching treatment of the pipe forgings for pressure vessels to solve the problem that there is a lack of a mechanism for transmitting driving force between all the side rails, which cannot be driven to open and close synchronously, resulting in the need to drive all the side rails to open and close step by step and in batches before and after each loading and unloading of the forgings, which makes the operation more cumbersome and inconvenient.

[0005] The technical solution proposed by the present invention is: a lifting method for a pipe forging for a pressure vessel during quenching treatment, specifically comprising: a crane and a hanging basket, wherein the hanging basket as a whole is composed of a bottom rail at the bottom side and four side rails rotatably installed around the bottom rail; The tops of the two short side rails are symmetrically welded with two lifting rings; the crane is composed of a gantry and a lifting mechanism, and the four inclined lifting ropes forked at the tail end of the main steel wire rope on the lifting mechanism are correspondingly connected and fixed together with the four lifting rings; The tail end of the side rail is welded with a U-shaped transmission frame at an angle; two horizontal sliding and two vertical sliding vertical bar frames are installed in the space below the bottom side of the bottom rail, and racks are welded on the four vertical bar frames, and the four racks are arranged vertically and horizontally and vertically in an alternating manner; Two U-shaped support frames are symmetrically welded on the bottom sides of the two long side bars of the bottom rail, and a driving assembly is rotatably installed at the center position of the space between the two U-shaped support frames. The driving assembly as a whole is composed of a central rotating shaft and two gears and a positioning wheel installed on the central rotating shaft, wherein the upper gear is meshed with the two racks on the upper side for transmission, and the lower gear is meshed with the two racks on the lower side for transmission; The horizontal side shafts at the tail ends of the four U-shaped transmission frames correspond to the four vertical bar frames that penetrate and slide in cooperation; an insertion shaft is slidably installed in the space outside the circumference of the positioning wheel, and a positioning hole is opened on the circumferential side of the positioning wheel, and the head end of the insertion shaft corresponds to the positioning hole for plugging cooperation.

[0006] Furthermore, The two gears are mounted side by side on the top of the central rotating shaft, and the positioning wheel is welded and mounted on the lower half of the central rotating shaft. A longitudinal support connecting plate is welded between the middle parts of the horizontal support rods at the bottom side of the U-shaped support frame, and the driving assembly is rotatably mounted on the middle part of the longitudinal support connecting plate; A shaft sleeve is welded on the longitudinal support connecting plate at a position close to the plug-in shaft, and the plug-in shaft and the shaft sleeve are plug-fitted through and through.

[0007] Furthermore, The racks at four locations are arranged in pairs and slide toward each other, and square installation grooves are formed around the interlaced parts of the racks at four locations, and the two gears rotate in the square installation grooves.

[0008] Furthermore, A horizontal support driving rod is slidably installed on a vertical support side rod of a U-shaped support frame close to the sleeve through a spring, a connecting rod is rotatably connected between the tail end of the horizontal support driving rod and the tail end of the plug shaft, and the horizontal support driving rod is an L-shaped structure.

[0009] Furthermore, Two positioning square sleeves are welded on the bottom side cross brace of the U-shaped support frame through two L-shaped support plates, and four racks are correspondingly penetrated and slidably matched with the four positioning square sleeves.

[0010] Furthermore, Two L-shaped mounting blocks are symmetrically welded at the bottom of the four side bars on the periphery of the bottom rail, and a rotating rod is welded at the opening portion of the first end of the U-shaped transmission frame, and the rotating rod is rotatably matched with the L-shaped mounting block.

[0011] Furthermore, The lifting mechanism is slidably mounted on the top crossbeam of the gantry, and a quenching pool is placed on the ground between two vertical pillars of the gantry.

[0012] The present invention also proposes a technical solution: a lifting method for a lifting device used in a quenching treatment of a pipe forging of a pressure vessel, comprising the following operating steps: ①In the initial state, the hanging basket lands on the ground on one side of the quenching pool. First, slide the L-shaped mounting block toward the outside of the U-shaped support frame to drive the insertion shaft to separate from the positioning hole on the positioning wheel, and loosen the drive assembly and the four side rails; ② Then, turn the four side rails outwards and open them. The four side rails are linked by four vertical bars, four racks and drive components. Turning any one side rail outwards can open all the side rails synchronously. When the four side rails are turned outwards, the four racks are engaged to drive the drive components and positioning wheels to rotate; ③. Then, transfer the pipe forgings that need quenching treatment to the bottom rail, and lift the two short side rails upward through the lifting mechanism. When the two short side rails are pulled upward and swung, all the side rails are driven to stand up and close synchronously; ④. When the four side rails are swung upward and erected, the four racks are meshed to drive the drive assembly and the positioning wheel to rotate. When the positioning hole of the positioning wheel coincides with the plug-in shaft, the four side rails are just completely erected and closed, and the plug-in shaft is pushed by the spring rebound on the L-shaped mounting block to automatically engage with the positioning hole, so that the four side rails are inserted and positioned in the erected and closed state; ⑤. Lift the hanging basket fully loaded with pipe forgings through the lifting mechanism and transfer it to the cooling medium inside the fire pool for immersion cooling. After the cooling is completed, lift the hanging basket through the lifting mechanism and transfer it to the ground on one side of the quenching pool; ⑥. Finally, remove all the pipe forgings inside the hanging basket.

[0013] The present invention provides a lifting method for a pipe forging for a pressure vessel during quenching treatment, which has the following beneficial effects: The invention has four side rails which are rotatably installed. When the butt-jointed pipe forgings are loaded and unloaded inside the hanging basket, the four side rails can be completely turned outward and opened, freeing up operating space for lifting and loading the butt-jointed pipe forgings around the hanging basket. The butt-jointed pipe forgings can be directly lifted and loaded horizontally without obstacles. Compared with the prior art, the trouble of lifting the butt-jointed pipe forgings significantly to circumvent or cross the side rails is avoided. The operation is convenient and labor-saving, which helps to improve the loading and unloading efficiency of the butt-jointed pipe forgings inside the hanging basket.

[0014] In addition, when the four racks and the four vertical bars are connected and can be driven synchronously, turning any side rail inside or outside can drive all the racks and vertical bars to slide back and forth together, and control all the side rails to open and close synchronously. Compared with the existing technology, there is no need to drive all the side rails to open and close step by step before and after each loading and unloading of the forgings. The operation is relatively convenient and quick, which helps to further improve the efficiency of loading and unloading the pipe forgings.

[0015] In addition, since the four diagonal stay ropes at the tail end of the main wire hoisting rope on the hoisting mechanism are fixedly connected to the four lifting rings, when the hoisting mechanism winds up the main wire hoisting rope to hoist the hanging basket, it can lift and drive the two short side rails to swing upward and inward, controlling all the side rails to stand up and close synchronously. This enables the standing and swinging closing actions of the four side rails to be indirectly driven by the lifting force of the hoisting mechanism, eliminating the trouble of manually exerting extra force to drive the four side rails to swing and stand up and close when loading and unloading the butt-welded pipe forgings, and helping to indirectly reduce the labor intensity of workers for loading and unloading the butt-welded pipe forgings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1 shows the overall front-side structural schematic diagram of the present invention; Figure 2 shows the overall bottom-side structural schematic diagram of the present invention; Figure 3 shows the structural schematic diagram of the hanging basket of the present invention; Figure 4 shows the bottom-side structural schematic diagram of the hanging basket of the present invention; Figure 5 shows the schematic diagram of the disassembled state of the side rail of the present invention; Figure 6 shows the structural schematic diagram of the vertical strip frame of the present invention; Figure 7 shows the structural schematic diagram of the drive assembly of the present invention; Figure 8 shows the structural schematic diagram of the cross brace drive rod of the present invention; LIST OF REFERENCE NUMERALS 1, traveling crane; 101, gantry; 102, hoisting mechanism; 2, quenching pool; 3, drive assembly; 301, gear; 302, positioning wheel; 4, hanging basket; 401, side rail; 402, U-shaped transmission frame; 403, rotating rod; 404, bottom rail; 4041, L-shaped mounting block; 405, U-shaped support frame; 4051, cross brace drive rod; 4052, positioning square sleeve; 4053, bushing; 4054, longitudinal brace connecting plate; 4055, connecting rod; 4056, insertion shaft; 5, vertical strip frame; 501, rack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] For the convenience of explanation, the length direction of the bottom bar is marked as the left-right direction, and the width direction is marked as the front-back direction.

[0021] Please refer to Figures 1 to 8 , Embodiment 1: The present invention provides a lifting method for a pipe forging for a pressure vessel during quenching treatment, comprising: a crane 1 and a hanging basket 4, wherein the hanging basket 4 is composed of a bottom rail 404 at the bottom side and four side rails 401 rotatably installed around the bottom rail 404; Two lifting rings are symmetrically welded at the top of the two short side rails 401; the crane 1 is composed of a gantry 101 and a lifting mechanism 102, and four inclined lifting ropes forked at the tail end of the main steel wire rope on the lifting mechanism 102 are correspondingly connected and fixed together with the four lifting rings; The four side rails 401 are all rotatably installed, so when loading and unloading the butt-jointed pipe forgings inside the hanging basket 4, the four side rails 401 can be turned outward and opened completely, freeing up the operating space for lifting and loading the butt-jointed pipe forgings around the hanging basket 4, and directly carrying out barrier-free horizontal lifting and loading and unloading of the butt-jointed pipe forgings. Compared with the prior art, it avoids the trouble of lifting and lifting the butt-jointed pipe forgings to avoid or cross the side rails 401, and the operation is more convenient and labor-saving, which helps to improve the loading and unloading efficiency of the butt-jointed pipe forgings inside the hanging basket 4; The tail end of the side rail 401 is welded with a U-shaped transmission frame 402 at an angle; two horizontally sliding and two vertically sliding vertical bars 5 are installed in the space below the bottom side of the bottom rail 404, and racks 501 are welded on the four vertical bars 5, and the four racks 501 are arranged vertically and horizontally and vertically in an alternating manner; Two U-shaped support frames 405 are symmetrically welded to the bottom sides of the two long side bars of the bottom rail 404. A driving assembly 3 is rotatably installed at the center of the space between the two U-shaped support frames 405. The driving assembly 3 is composed of a central rotating shaft and two gears 301 and a positioning wheel 302 installed on the central rotating shaft. The upper gear 301 is meshed with the two racks 501 on the upper side for transmission, and the lower gear 301 is meshed with the two racks 501 on the lower side for transmission. The horizontal side shafts at the tail ends of the four U-shaped transmission frames 402 correspond to the four vertical bar frames 5 and slide through them; an insertion shaft 4056 is slidably installed in the space outside the circumference of the positioning wheel 302, and a positioning hole is opened on the circumferential side of the positioning wheel 302, and the head end of the insertion shaft 4056 corresponds to the positioning hole. The vertical bar frame 5 is connected to the side rail 401 through the U-shaped transmission frame 402. When the side rail 401 is turned inside out, it can be pushed to drive the vertical bar frame 5 and the rack 501 to slide back and forth. From this, it can be inferred that the reciprocating sliding of the vertical bar frame 5 and the rack 501 can also drive the side rail 401 to turn inside out. Through the two gears 301, the driving component 3 can drive the four racks 501 and the four vertical bar frames 5 to connect, so that the four racks 501 and the four vertical bar frames 5 can be synchronously driven to slide. , and then, when the four racks 501 and the four vertical bars 5 are connected and can be driven synchronously, turning any side fence 401 inside and outside can drive all the racks 501 and the vertical bars 5 to slide back and forth together, and control all the side fences 401 to open and close synchronously together. Compared with the prior art, it is not necessary to drive all the side fences 401 to open and close step by step and in batches before and after each loading and unloading of the forgings. The operation is more convenient and quick, which helps to further improve the loading and unloading efficiency of the pipe forgings; Since the four inclined lifting ropes forked at the tail end of the main steel wire lifting rope on the lifting mechanism 102 are fixedly connected with the four lifting rings, the lifting mechanism 102 can pull and drive the two short side fences 401 to swing upward and inward when winding the main steel wire lifting rope to lift the hanging basket 4, and control all the side fences 401 to be erected and closed synchronously, so that the erection, swinging and closing action of the four side fences 401 can be indirectly driven by the lifting force of the lifting mechanism 102, eliminating the trouble of additional manual effort to drive the four side fences 401 to swing, erect and close when loading and unloading the pipe forgings, which helps to indirectly reduce the labor intensity generated by manual loading and unloading of the pipe forgings; The insertion shaft 4056 can be inserted into the fixed positioning wheel 302 and the driving assembly 3 to position the four side rails 401 in an upright and closed use state.

[0022] Furthermore, Two gears 301 are mounted side by side on the top of the central rotating shaft, and the positioning wheel 302 is welded and mounted on the lower half of the central rotating shaft. A longitudinal support connecting plate 4054 is welded between the middle parts of the horizontal support rods at the bottom side of the U-shaped support frame 405, and the driving assembly 3 is rotatably mounted on the middle part of the longitudinal support connecting plate 4054; A shaft sleeve 4053 is welded on the longitudinal support connecting plate 4054 near the insertion shaft 4056, and the insertion shaft 4056 and the shaft sleeve 4053 are inserted and matched.

[0023] Preferably, The racks 501 at four locations are arranged to slide towards each other in pairs, and square installation grooves are formed around the interlaced parts of the racks 501 at four locations. The gears 301 at two locations are rotatably located in the square installation grooves.

[0024] Preferably, A cross-bracing driving rod 4051 is slidably installed on a vertical bracing side rod of the U-shaped supporting frame 405 near the shaft sleeve 4053 through a spring, and a connecting rod 4055 is rotatably connected between the tail end of the cross-bracing driving rod 4051 and the tail end of the plug shaft 4056, and the cross-bracing driving rod 4051 is an L-shaped structure. The cross-bracing driving rod 4051, the connecting rod 4055 and the plug shaft 4056 are connected together to form a crank slider mechanism, through which the cross-bracing driving rod can be slid left and right 4051 can drive the insertion shaft 4056 to slide forward and backward and plug into and separate from the positioning holes on the positioning wheel 302, thereby loosening and tightening the drive assembly 3 and the four side rails 401; when the insertion shaft 4056 is pulled out of the positioning holes and the four side rails 401 are loosened, the four side rails 401 can be opened by swinging outward and downward, and the four vertical bar frames 5 and the four racks 501 can be driven by the four U-shaped transmission frames 402 to slide toward the two gears 301, and the four vertical bars 501 can be opened. The bar frame 5 and the four racks 501 slide toward the two gears 301 to mesh and drive the driving assembly 3 and the positioning wheel 302 to rotate, and control the positioning hole and the plug shaft 4056 to reverse and stagger. After the positioning hole and the plug shaft 4056 are reversed and staggered, the head end of the plug shaft 4056 abuts against the circumferential side of the positioning wheel 302. When the four side fences 401 swing upward and inward to close, they drive the four vertical bar frames 5 and the four racks 501 to move away from the four side fences 401 through the four U-shaped transmission frames 402. The four vertical bars 5 and the four racks 501 slide toward the two gears 301 and can engage with each other to drive the driving assembly 3 and the positioning wheel 302 to rotate. When the positioning hole rotates with the positioning wheel 302 and coincides with the plug-in shaft 4056, the spring on the cross-bracing driving rod 4051 can rebound and drive the cross-bracing driving rod 4051 to slide back to the left, automatically pushing the control plug-in shaft 4056 to reset and plug into the positioning hole, thereby restoring the positioning of the four side rails 401.

[0025] Preferably, Two positioning square sleeves 4052 are welded on the bottom side cross brace of the U-shaped support frame 405 through two L-shaped support plates, and the four racks 501 are correspondingly penetrated and slidably matched with the four positioning square sleeves 4052.

[0026] Preferably, Two L-shaped mounting blocks 4041 are symmetrically welded to the bottom of the four side bars outside the bottom rail 404, and a rotating rod 403 is welded to the opening part of the first end of the U-shaped transmission frame 402, and the rotating rod 403 is rotatably matched with the L-shaped mounting block 4041.

[0027] Preferably, The lifting mechanism 102 is slidably mounted on the top crossbeam of the gantry 101 , and a quenching pool 2 is placed on the ground between two vertical pillars of the gantry 101 .

[0028] Based on the first embodiment, the second embodiment: The present invention also provides a lifting method for a pressure vessel pipe forging using a lifting device in a quenching process, comprising the following operating steps: ①, Initial state: The hanging basket 4 lands on the ground on one side of the quenching pool 2. First, the L-shaped mounting block 4041 is slid toward the outside of the U-shaped support frame 405, driving the insertion shaft 4056 to be separated from the positioning hole on the positioning wheel 302, and loosening the driving assembly 3 and the four side rails 401; ② Then, the four side rails 401 are turned outward and opened. The four side rails 401 are linked by the four vertical bars 5, the four racks 501 and the driving assembly 3. Turning out any one side rail 401 can open all the side rails 401 synchronously. When the four side rails 401 are turned outward and opened, the four racks 501 are engaged to drive the driving assembly 3 and the positioning wheel 302 to rotate; ③. Then, the pipe forgings that need quenching treatment are transferred and placed on the bottom rail 404, and the two short side rails 401 are lifted upward by the lifting mechanism 102. When the two short side rails 401 are pulled upward and swung, all the side rails 401 are driven to stand up and close synchronously; ④, when the four side rails 401 are swung upward and erected, the four racks 501 are engaged to drive the driving assembly 3 and the positioning wheel 302 to rotate. When the positioning hole of the positioning wheel 302 coincides with the insertion shaft 4056, the four side rails 401 are just completely erected and closed, and the insertion shaft 4056 is pushed by the spring rebound on the L-shaped mounting block 4041 to automatically engage with the positioning hole, so that the four side rails 401 are inserted and positioned in the erected and closed state; ⑤. The hanging basket 4 fully loaded with pipe forgings is lifted by the lifting mechanism 102 and transferred to the cooling medium inside the fire pool 2 for immersion cooling. After the cooling is completed, the hanging basket 4 is lifted and transferred to the ground on one side of the quenching pool 2 by the lifting mechanism 102; ⑥. Finally, all the pipe forgings inside the hanging basket 4 are unloaded.

[0029] Working principle: In the initial state, the hanging basket 4 lands on the ground on one side of the quenching pool 2. First, the L-shaped mounting block 4041 is slid toward the outside of the U-shaped support frame 405 to drive the plug shaft 4056 to be separated from the positioning hole on the positioning wheel 302, and the driving component 3 and the four side rails 401 are released. Then, the four side rails 401 are turned outward and opened. The four side rails 401 are linked by the four vertical bars 5, the four racks 501 and the driving component 3. When any side rail 401 is turned outward, the driving component 3 and the positioning wheel 302 are driven to rotate through the engagement of the four racks 501. Then, the pipe forgings that need to be quenched are transferred and placed on the bottom rail 404, and the two short side rails 401 are lifted upward by the lifting mechanism 102. When being pulled upward and swung, all the side rails 401 are driven to be erected and closed synchronously. When the four side rails 401 are swung upward and erected, the four racks 501 are engaged to drive the driving assembly 3 and the positioning wheel 302 to rotate. When the positioning hole of the positioning wheel 302 coincides with the insertion shaft 4056, the four side rails 401 are just completely erected and closed, and the insertion shaft 4056 is pushed by the spring rebound on the L-shaped mounting block 4041 to automatically engage with the positioning hole, so that the four side rails 401 are inserted and positioned in the erected and closed state, and the hanging basket 4 fully loaded with pipe forgings is lifted by the lifting mechanism 102 and transferred to the cooling medium inside the fire pool 2 for immersion cooling and cooling. After the cooling and cooling is completed, the hanging basket 4 is lifted and transferred to the ground on one side of the quenching pool 2 by the lifting mechanism 102, and finally the pipe forgings inside the hanging basket 4 are all unloaded.

[0030] In this article, there are a few points to note: 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0031] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0032] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A lifting device for quenching a pipe forging of a pressure vessel, comprising: A traveling vehicle (1) and a hanging basket (4), wherein the hanging basket (4) is composed of a bottom rail (404) on the bottom side and four side rails (401) rotatably mounted around the bottom rail (404); The invention is characterized in that two lifting rings are symmetrically welded to the tops of the two short side rails (401); the crane (1) is composed of a gantry (101) and a lifting mechanism (102); four inclined lifting ropes forked at the tail ends of the main steel wire ropes on the lifting mechanism (102) are correspondingly connected and fixed together with the four lifting rings; A U-shaped transmission frame (402) is welded obliquely at the rear end of the side rail (401); two horizontally sliding and two vertically sliding vertical bars (5) are installed in the space below the bottom side of the bottom rail (404); racks (501) are welded on the four vertical bars (5), and the four racks (501) are arranged in a vertical and horizontal manner and in an up-and-down manner; Two U-shaped support frames (405) are symmetrically welded to the bottom sides of the two long side bars of the bottom rail (404); a driving assembly (3) is rotatably installed at the center position of the space between the two U-shaped support frames (405); the driving assembly (3) as a whole is composed of a central rotating shaft and two gears (301) and a positioning wheel (302) installed on the central rotating shaft, wherein the upper gear (301) is meshed with the two racks (501) on the upper side for transmission, and the lower gear (301) is meshed with the two racks (501) on the lower side for transmission; The horizontal side axes at the rear ends of the four U-shaped transmission frames (402) are correspondingly inserted and slidably matched with the four vertical bar frames (5); an insertion shaft (4056) is slidably installed in the space outside the circumference of the positioning wheel (302), and a positioning hole is opened on the circumferential side of the positioning wheel (302), and the head end part of the insertion shaft (4056) is correspondingly inserted and matched with the positioning hole.

2. A lifting device for quenching of a pipe forging of a pressure vessel according to claim 1, characterized in that: The two gears (301) are mounted side by side on the top portion of the central rotating shaft, and the positioning wheel (302) is welded and mounted on the lower half of the central rotating shaft; A longitudinal support connecting plate (4054) is welded between the middle parts of the horizontal support rods at the bottom side of the U-shaped support frame (405), and the driving component (3) is rotatably mounted on the middle part of the longitudinal support connecting plate (4054); A shaft sleeve (4053) is welded on the longitudinal support connecting plate (4054) at a position close to the plug shaft (4056), and the plug shaft (4056) and the shaft sleeve (4053) are inserted and matched.

3. The lifting equipment for quenching of a pressure vessel pipe forging according to claim 1, characterized in that: The racks (501) are arranged at four locations so as to slide towards each other in pairs, and square installation grooves are formed between the interlaced parts of the racks (501) at four locations, and the gears (301) at two locations are rotatably located in the square installation grooves.

4. The lifting device for quenching of a pipe forging of a pressure vessel according to claim 2, characterized in that: A cross-bracing driving rod (4051) is slidably installed on a vertical bracing side rod of a U-shaped supporting frame (405) close to the shaft sleeve (4053) through a spring, and a connecting rod (4055) is rotatably connected between the tail end of the cross-bracing driving rod (4051) and the tail end of the plug shaft (4056), and the cross-bracing driving rod (4051) is in an L-shaped structure.

5. The lifting equipment for quenching of a pipe forging of a pressure vessel according to claim 1, characterized in that: Two positioning square sleeves (4052) are welded to the bottom side cross brace of the U-shaped support frame (405) via two L-shaped support plates, and four racks (501) are correspondingly penetrated and slidably matched with the four positioning square sleeves (4052).

6. The lifting equipment for quenching of a pipe forging of a pressure vessel according to claim 1, characterized in that: Two L-shaped mounting blocks (4041) are symmetrically welded to the bottom of the four side bars on the periphery of the bottom rail (404), and a rotating rod (403) is welded to the opening portion of the first end of the U-shaped transmission frame (402), and the rotating rod (403) and the L-shaped mounting block (4041) are rotatably matched.

7. The lifting equipment for quenching of a pipe forging of a pressure vessel according to claim 1, characterized in that: The lifting mechanism (102) is slidably mounted on a top crossbeam of the gantry (101), and a quenching pool (2) is placed on the ground between two vertical pillars of the gantry (101).

8. A lifting method for a pressure vessel pipe forging using a lifting device in a quenching process according to any one of claims 1 to 7, characterized in that: The steps include: ①, Initial state: The hanging basket (4) is lowered to the ground on one side of the quenching pool (2). First, the L-shaped mounting block (4041) is slid toward the outside of the U-shaped support frame (405), so that the insertion shaft (4056) is pulled out and separated from the positioning hole on the positioning wheel (302), and the driving assembly (3) and the four side rails (401) are released; ② Then, the four side rails (401) are turned outward and opened. The four side rails (401) are linked through the four vertical bars (5), the four racks (501) and the driving assembly (3). Turning out any one of the side rails (401) can open all the side rails (401) synchronously. When the four side rails (401) are turned outward and opened, the four racks (501) are engaged to drive the driving assembly (3) and the positioning wheel (302) to rotate; ③. Then, the pipe forgings that need to be quenched are transferred and placed on the bottom rail (404), and the two short side rails (401) are lifted upward by the lifting mechanism (102). When the two short side rails (401) are pulled upward and swung, all the side rails (401) are driven to be erected and closed synchronously; ④. When the four side rails (401) are swung upward to stand upright, the four racks (501) are meshed to drive the drive assembly (3) and the positioning wheel (302) to rotate. When the positioning hole of the positioning wheel (302) coincides with the insertion shaft (4056), the four side rails (401) are just completely erected and closed, and the insertion shaft (4056) is pushed by the spring rebound on the L-shaped mounting block (4041) to automatically engage with the positioning hole, so that the four side rails (401) are inserted and positioned in an upright closed state; ⑤, lifting the hanging basket (4) fully loaded with pipe forgings by means of the lifting mechanism (102) and transferring it to the cooling medium inside the quenching pool (2) for immersion cooling. After the cooling is completed, the hanging basket (4) is lifted by the lifting mechanism (102) and transferred to the ground on one side of the quenching pool (2); ⑥. Finally, remove all the pipe forgings inside the hanging basket (4).

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