An efficient assembly device and method for large valves

Abstract

The present invention discloses an efficient assembly device and method for large valves, belonging to the technical field of valve assembly, including a mobile mounting frame, a device positioning component, a centering and alignment mechanism, and a hoisting connection component; the device positioning component is installed on the mobile mounting frame, and the device positioning component includes a positioning drive module, a positioning module, and a support positioning module; the positioning module is installed on the mobile mounting frame, and the positioning drive module is installed on the mobile mounting frame; the support positioning module is installed on the mobile mounting frame; a centering and alignment mechanism is installed on the upper side of the mobile mounting frame, and the centering and alignment mechanism includes a moving module, a centering component, and an alignment module; the moving module is installed on the mobile mounting frame, the centering component is installed on the moving end of the moving module, and the alignment module is installed on the moving end of the moving module. By the above method, the mobile mounting frame is positioned through the cooperation of the positioning module and the support positioning module; the valve stem, the inner valve cover, and the upper valve cover are positioned through the centering component.

Description

Technical Field

[0001] The present invention relates to the technical field of valve assembly, and particularly relates to a high-efficiency assembly device and method for large valves. Background Art

[0002] The main components of a valve include a valve seat, a valve stem, a valve core, a valve cover, and a seal, etc.; during assembly production, usually based on the valve seat, and then each part component is sequentially moved onto the valve seat through a moving device, and then assembled into the valve seat in sequence.

[0003] For example, Chinese Patent CN118023893B discloses a valve assembly machine. This assembly machine drives the valve seat and the valve ball to move, adjusts the postures of the valve seat and the valve ball during the movement to align them during assembly; then drives the valve ball to press down to move the valve ball into the valve seat to complete the assembly.

[0004] However, it is difficult for this device to move and assemble large valves; the relevant components of large valves are relatively heavy, and usually a hoisting device is used to move each part component; and it is difficult to control the hoisting accuracy and the posture of the components during the hoisting process, and it is difficult to quickly align the central positions of each part component of the valve.

[0005] Based on this, the present invention designs a high-efficiency assembly device and method for large valves to solve the above problems. Summary of the Invention

[0006] Aiming at the above-mentioned disadvantages of the prior art, the present invention provides a high-efficiency assembly device and method for large valves.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] A high-efficiency assembly device for large valves includes a movable mounting frame, a device positioning component, and a centering and alignment mechanism, and further includes a hoisting connection member for connecting the valve stem, the inner valve cover, and the upper valve cover to an external hoisting device;

[0009] The device positioning component is installed on the movable mounting frame. The device positioning component includes a positioning drive module, a positioning module, and a support positioning module; two groups of positioning modules for clamping the valve seat are installed on the movable mounting frame, and a positioning drive module for driving the two groups of positioning modules is installed on the movable mounting frame; a support positioning module is installed on the movable mounting frame;

[0010] The upper side of the movable mounting frame is provided with a centering and alignment mechanism for positioning and lowering the valve stem, the inner valve cover, and the upper valve cover. The centering and alignment mechanism includes a moving module, a centering component, and an alignment module; the moving module is installed on the movable mounting frame, the moving end of the moving module is installed with a centering component, and the moving end of the moving module is installed with an alignment module.

[0011] Further, the positioning and driving module includes a positioning motor, a positioning threaded rod, a moving block, and a limiting slider. The positioning motor is fixedly installed on the moving mounting frame, the positioning threaded rod is rotatably installed on the moving mounting frame, and the output end of the positioning motor is fixedly connected to the positioning threaded rod; the moving block is threadedly connected to the positioning threaded rod through a threaded sleeve; the limiting sliders are symmetrically and fixedly installed on the moving block; limiting chutes are symmetrically formed on the moving mounting frame; the limiting sliders are in limiting sliding connection with the limiting chutes.

[0012] Further, the positioning module includes two sets of synchronous rotation modules, a moving positioning block, and a fixed positioning block. The synchronous rotation modules are symmetrically installed on the moving mounting frame, the synchronous rotation modules are connected to the moving block, and the moving positioning block is fixedly installed on the synchronous rotation module; the fixed positioning block is fixedly installed on the moving mounting frame; the inner sides of the two moving positioning blocks and the fixed positioning block are located on the same circumference.

[0013] Further, the synchronous rotation module includes a connecting frame, a connecting shaft, and a rotating arm. One end of the connecting frame is rotatably connected to the moving block, and the other end of the connecting frame is rotatably connected to one end of the rotating arm; the connecting shaft is fixedly installed on the moving mounting frame, the connecting shaft is rotatably connected to the middle of the rotating arm, and the other end of the rotating arm is fixedly installed with a moving positioning block.

[0014] Further, the support and positioning module includes a conforming positioning frame and rollers. The conforming positioning frame is fixedly installed on the lower side of the moving mounting frame, and the rollers are rotatably installed at equal intervals in a circumferential array on the lower side of the conforming positioning frame.

[0015] Further, the moving module includes a support frame, a moving driving module, and a guiding module. The support frame is fixedly installed on the moving mounting frame; the moving driving module is installed on the support frame, and the guiding module for guiding the moving end of the moving driving module is installed on the support frame.

[0016] Further, the moving driving module includes a moving motor, a moving threaded rod, and a moving frame. The moving motor is fixedly installed on the support frame, and the moving threaded rod is rotatably installed on the support frame; the output end of the moving motor is fixedly connected to the moving threaded rod; the moving frame is threadedly connected to the moving threaded rod through a threaded sleeve.

[0017] Further, the centering assembly includes a synchronous driving module and a centering module. The synchronous driving module is installed on the moving frame, and multiple groups of centering modules are evenly installed on the synchronous driving module at equal intervals in a circumferential array.

[0018] Furthermore, the synchronous drive module includes a fixed ring frame, a rotating ring frame, an incomplete gear, a drive gear, and a centering motor. The fixed ring frame is fixedly installed on the moving frame. The rotating ring frame is rotatably installed outside the fixed ring frame, and the incomplete gear is fixedly installed on the rotating ring frame. The drive gear is rotatably installed on the moving frame, and the incomplete gear is meshed with the drive gear. The centering motor is fixedly installed on the lower side of the moving frame, and the output end of the centering motor is fixedly connected to the drive gear.

[0019] To better achieve the object of the present invention, the present invention also provides a method for using a high-efficiency assembly device for large valves, including the following steps:

[0020] Step 1: The hoisting equipment drives the device to move, so that the support and positioning module supports at both ends of the valve seat; the positioning drive module drives the positioning module to hold the middle part of the valve seat, so that the center of the positioning module is aligned with the center of the valve seat;

[0021] Step 2: The hoisting equipment drives the valve stem to move to the upper side of the valve seat through the hoisting connecting piece; the moving module drives the centering component to move to the middle part of the valve stem; the centering component clamps the valve stem; the alignment module pushes the valve core, so that the alignment groove is aligned with the alignment block;

[0022] Step 3: The hoisting equipment drives the valve stem and the valve core to vertically move downward under the limiting action of the centering component and the alignment module. At the same time, the moving module drives the centering component and the alignment module to synchronously move vertically downward, and assembles the valve stem and the valve core into the valve seat;

[0023] Step 4: The hoisting equipment drives the inner valve cover to move to the upper side of the valve seat, the moving module drives the centering component to move upward, and the centering component positions the inner valve cover; the hoisting equipment drives the inner valve cover to move downward to complete the assembly of the inner valve cover;

[0024] Step 5: After the operator assembles the remaining structural parts of the valve, the hoisting equipment drives the upper valve cover to move to the upper side of the valve seat, the moving module drives the centering component to move upward, and the centering component positions the upper valve cover; the hoisting equipment drives the upper valve cover to move downward to complete the assembly of the upper valve cover.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The hoisting equipment drives the device to move, so that the support and positioning module supports at both ends of the valve seat; the positioning drive module drives the positioning module to hold the middle part of the valve seat, so that the center of the positioning module aligns with the center of the valve seat; the hoisting equipment drives the valve stem to move to the upper side of the valve seat through the hoisting connecting piece; the moving module drives the centering component to move to the middle part of the valve stem; the centering component clamps the valve stem; the alignment module pushes the valve core, so that the alignment groove aligns with the alignment block; the hoisting equipment drives the valve stem and the valve core to vertically move downward under the limiting action of the centering component and the alignment module, and at the same time the moving module drives the centering component and the alignment module to synchronously move vertically downward, and assembles the valve stem and the valve core into the valve seat; the hoisting equipment drives the inner valve cover to move to the upper side of the valve seat, the moving module drives the centering component to move upward, and the centering component positions the inner valve cover; the hoisting equipment drives the inner valve cover to move downward to complete the assembly of the inner valve cover; after the operator assembles the remaining structural parts of the valve, the hoisting equipment drives the upper valve cover to move to the upper side of the valve seat, the moving module drives the centering component to move upward, and the centering component positions the upper valve cover; the hoisting equipment drives the upper valve cover to move downward to complete the assembly of the upper valve cover; thus, through the cooperation of the positioning drive module, the positioning module and the support and positioning module, the positioning of the moving mounting frame and the moving module, the centering component and the alignment module on the moving mounting frame is completed; then, the centering component positions the valve stem, the valve core, the inner valve cover and the upper valve cover; before the valve stem, the valve core, the inner valve cover and the upper valve cover are hoisted to the upper side of the valve seat for assembly, their centers quickly coincide with the valve seat, and the alignment groove on the valve core is aligned with the alignment block in the valve seat through the alignment module, so that the assembly is more accurate and efficient; during the assembly of large valves, the components are quickly positioned to ensure the assembly accuracy and efficiency of large valves. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Stereogram of a high-efficiency assembly device for large valves of the present invention Figure 1 ;

[0028] Figure 2 Front view of a high-efficiency assembly device for large valves of the present invention;

[0029] Figure 3 Left view of a high-efficiency assembly device for large valves of the present invention;

[0030] Figure 4 Is the cross-sectional view along the Figure 3 A-A direction;

[0031] Figure 5 It is a schematic diagram of the valve core, valve stem and their connection structure;

[0032] Figure 6 It is a schematic diagram of the inner valve cover and its connection structure;

[0033] Figure 7 It is a schematic diagram of the upper valve cover structure;

[0034] Figure 8 It is a three-dimensional view of a high-efficiency assembly device for large valves of the present invention Figure 2 ;

[0035] Figure 9 It is a three-dimensional view of a high-efficiency assembly device for large valves of the present invention Figure 3 ;

[0036] Figure 10 It is Figure 1 The enlarged view at position B in

[0037] Figure 11 It is a schematic diagram of the moving frame and its connection structure.

[0038] The reference numerals in the figure respectively represent:

[0039] 1. Moving mounting frame; 2. Device positioning assembly; 21. Positioning drive module; 211. Positioning motor; 212. Positioning threaded rod; 213. Moving block; 214. Limiting slider; 215. Limiting chute; 22. Positioning module; 221. Connecting frame; 222. Connecting shaft; 223. Rotating arm; 224. Moving positioning block; 225. Fixed positioning block; 23. Support positioning module; 231. Conforming positioning frame; 232. Roller; 3. Centering and aligning mechanism; 31. Moving module; 311. Support frame; 312. Moving motor; 313. Moving threaded rod; 314. Moving frame; 315. Centering slider; 316. Guide rail; 32. Centering assembly; 321. Fixed ring frame; 322. Rotating ring frame; 323. Incomplete gear; 324. Driving gear; 325. Centering motor; 326. Limiting sleeve; 327. Synchronous frame; 328. Centering roller; 329. Extension roller; 33. Alignment module; 331. Alignment cylinder; 332. Alignment plate; 4. Lifting connection member; 41. Valve stem connection member; 411. Threaded sleeve; 412. Connecting suspension rod; 413. Rotating disk; 414. Valve stem hanging disk; 42. Valve cover connection member; 421. Connecting rod; 422. Limiting block; 423. Valve cover hanging disk; 6. Valve seat; 61. Alignment block; 71. Valve stem; 72. Valve core; 721. Alignment groove; 81. Inner valve cover; 82. Upper valve cover; 91. Connecting hole. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0041] In the following description, "left", "right", "front", "rear", "upper", and "lower" mentioned are oriented in the perspective direction of the front view.

[0042] Embodiment 1: In some embodiments, please refer to the Figures 1 - 7 of the specification drawings. A high-efficiency assembly device for large valves includes a mobile mounting frame 1, a device positioning assembly 2, a centering and alignment mechanism 3, and a lifting connection member 4 for connecting the valve stem 71, the inner valve cover 81, and the upper valve cover 82 to an external lifting device.

[0043] The device positioning assembly 2 is installed on the mobile mounting frame 1. The device positioning assembly 2 includes a positioning drive module 21, a positioning module 22, and a support positioning module 23. Two groups of positioning modules 22 for clamping the valve seat 6 are installed on the mobile mounting frame 1, and a positioning drive module 21 for driving the two groups of positioning modules 22 is installed on the mobile mounting frame 1. A support positioning module 23 is installed on the mobile mounting frame 1.

[0044] The centering and alignment mechanism 3 for positioning and lowering the valve stem 71, the inner valve cover 81, and the upper valve cover 82 is installed on the upper side of the mobile mounting frame 1. The centering and alignment mechanism 3 includes a moving module 31, a centering component 32, and an alignment module 33. The moving module 31 is installed on the mobile mounting frame 1, the centering component 32 is installed on the moving end of the moving module 31, and the alignment module 33 is installed on the moving end of the moving module 31.

[0045] In this embodiment, when the large-scale valve high-efficiency assembly device is working normally, before using the device, the valve stem 71 and the valve core 72 have been assembled and fixed, and the external lifting equipment is connected to the valve stem 71, the inner valve cover 81 and the upper valve cover 82 respectively through the lifting connector 4; the lifting equipment drives the mobile mounting frame 1, the positioning drive module 21, the positioning module 22, the supporting positioning module 23, the moving module 31, the centering component 32 and the alignment module 33 to move, so that the positioning module 22 is aligned with the middle of the valve seat 6, and the supporting positioning module 23 is aligned with the two ends of the valve seat 6; the mobile mounting frame 1 is initially positioned by supporting the supporting positioning module 23 at the two ends of the valve seat 6; then the positioning drive module 21 is operated to drive the positioning module 22 to move, and the positioning module 22 is used to hold the middle of the valve seat 6, so that the center of the positioning module 22 is aligned with the center of the valve seat 6, and the secondary positioning of the mobile mounting frame 1 is completed; so that the mobile mounting frame 1 is in the standard position, and the center of the centering component 32 on the mobile mounting frame 1 coincides with the center of the valve seat 6;

[0046] The external hoisting equipment drives the valve stem 71 to move to the upper side of the valve seat 6 through the hoisting connector 4, and the valve core 72 is located at the lower side of the valve stem 71; the moving module 31 is operated to drive the centering component 32 and the alignment module 33 to move, so that the centering component 32 moves through the lower side of the valve core 72 and moves to the middle of the valve stem 71; the centering component 32 is operated to clamp the valve stem 71, so that the center of the valve stem 71 coincides with the centering component 32, and then the center of the valve stem 71 and the valve core 72 are aligned with the center of the valve seat 6; the alignment module 33 is operated to push the valve core 72; the valve core 72 is located at the standard position, and the alignment groove 721 is aligned with the alignment block 61; the positioning of the valve stem 71 and the valve core 72 is completed;

[0047] The external lifting equipment drives the valve stem 71 and the valve core 72 to move vertically downward under the limiting action of the centering component 32 and the alignment module 33. At the same time, the moving module 31 drives the centering component 32 and the alignment module 33 to move vertically downward synchronously. The valve stem 71 and the valve core 72 are positioned by the centering component 32 and the alignment module 33, so that the centers of the valve stem 71 and the valve core 72 are aligned with the center of the valve seat 6, and the alignment groove 721 is aligned with the alignment block 61, so that the valve stem 71 and the valve core 72 are accurately moved into the valve seat 6, and the alignment block 61 is inserted into the alignment groove 721; thereby, the valve stem 71 and the valve core 72 are assembled into the valve seat 6; after the assembly is completed, the lifting connector 4 is no longer connected to the valve stem 71;

[0048] The external hoisting device drives the inner valve cover 81 to move above the valve seat 6 through the hoisting connecting piece 4. The moving module 31 drives the centering component 32 to move vertically upward. The inner valve cover 81 is positioned through the centering component 32 so that the center of the inner valve cover 81 coincides with the center of the valve seat 6. At this time, the center of the inner valve cover 81 is aligned with the valve stem 71. The external hoisting device drives the inner valve cover 81 to move vertically downward, and at the same time, the moving module 31 drives the centering component 32 to move vertically downward to complete the assembly of the inner valve cover 81.

[0049] Subsequently, after the operator assembles the remaining structural parts of the valve, the external hoisting device drives the upper valve cover 82 to move above the valve seat 6 through the hoisting connecting piece 4. The moving module 31 drives the centering component 32 to move vertically upward. The upper valve cover 82 is positioned through the centering component 32 so that the center of the upper valve cover 82 coincides with the center of the valve seat 6. At this time, the center of the upper valve cover 82 is aligned with the valve stem 71. The external hoisting device drives the upper valve cover 82 to move vertically downward, and at the same time, the moving module 31 drives the centering component 32 to move vertically downward to complete the assembly of the upper valve cover 82.

[0050] Thus, through the cooperation of the positioning drive module 21, the positioning module 22, and the support positioning module 23, the positioning of the moving mounting frame 1 and the moving module 31, the centering component 32, and the alignment module 33 on the moving mounting frame 1 is completed. Then, the valve stem 71, the valve core 72, the inner valve cover 81, and the upper valve cover 82 are positioned through the centering component 32. Before the valve stem 71, the valve core 72, the inner valve cover 81, and the upper valve cover 82 are hoisted above the valve seat 6 for assembly, the centers of the valve stem 71, the valve core 72, the inner valve cover 81, and the upper valve cover 82 quickly coincide with the valve seat 6. The alignment groove 721 on the valve core 72 is aligned with the alignment block 61 in the valve seat 6 through the alignment module 33, so that the assembly is more accurate and efficient. During the assembly of large valves, the components are quickly positioned to ensure the assembly accuracy and efficiency of large valves.

[0051] Embodiment 2: In some embodiments, as a preferred embodiment of the present invention, as Figures 1 - 3 、 Figure 8 and Figure 9 shown, the positioning drive module 21 includes a positioning motor 211, a positioning threaded rod 212, a moving block 213, and a limit slider 214. The positioning motor 211 is fixedly installed on the moving mounting frame 1. The positioning threaded rod 212 is rotatably installed on the moving mounting frame 1. The output end of the positioning motor 211 is fixedly connected to the positioning threaded rod 212. The moving block 213 is threadedly connected to the positioning threaded rod 212 through a threaded sleeve. The limit sliders 214 are symmetrically and fixedly installed on the moving block 213. The limit sliding grooves 215 are symmetrically formed on the moving mounting frame 1. The limit sliders 214 are in limit sliding connection with the limit sliding grooves 215.

[0052] The positioning module 22 includes two sets of synchronous rotation modules, a moving positioning block 224, and a fixed positioning block 225. The synchronous rotation modules are symmetrically installed on the moving mounting frame 1. The synchronous rotation modules are connected to the moving block 213, and the moving positioning block 224 is fixedly installed on the synchronous rotation modules; the fixed positioning block 225 is fixedly installed on the moving mounting frame 1; the inner sides of the two moving positioning blocks 224 and the fixed positioning block 225 are located on the same circumference;

[0053] The synchronous rotation module includes a connecting frame 221, a connecting shaft 222, and a rotating arm 223. One end of the connecting frame 221 is rotatably connected to the moving block 213, and the other end of the connecting frame 221 is rotatably connected to one end of the rotating arm 223; the connecting shaft 222 is fixedly installed on the moving mounting frame 1, the connecting shaft 222 is rotatably connected to the middle of the rotating arm 223, and the other end of the rotating arm 223 is fixedly installed with the moving positioning block 224;

[0054] The support positioning module 23 includes a conforming positioning frame 231 and rollers 232. The conforming positioning frame 231 is fixedly installed on the lower side of the moving mounting frame 1, and the rollers 232 are evenly and rotatably installed at equal intervals in a circumferential array on the lower side of the conforming positioning frame 231.

[0055] As Figures 1 - 11 shown, the moving module 31 includes a support frame 311, a moving drive module, and a guiding module. The support frame 311 is fixedly installed on the moving mounting frame 1; a moving drive module is installed on the support frame 311, and a guiding module for guiding the moving end of the moving drive module is installed on the support frame 311;

[0056] The moving drive module includes a moving motor 312, a moving threaded rod 313, and a moving frame 314. The moving motor 312 is fixedly installed on the support frame 311, and the moving threaded rod 313 is rotatably installed on the support frame 311; the output end of the moving motor 312 is fixedly connected to the moving threaded rod 313; the moving frame 314 is threadedly connected to the moving threaded rod 313 through a threaded sleeve;

[0057] The guiding module includes centering sliders 315 and guide rails 316. Centering sliders 315 are symmetrically and fixedly installed on both sides of the moving frame 314; guide rails 316 are symmetrically and fixedly installed on the support frame 311, and the centering sliders 315 are slidably connected to the guide rails 316 with limited movement;

[0058] The centering assembly 32 includes a synchronous drive module and a centering module. The synchronous drive module is installed on the moving frame 314, and multiple groups of centering modules are evenly installed on the synchronous drive module at equal intervals in a circumferential array;

[0059] The synchronous drive module includes a fixed ring frame 321, a rotating ring frame 322, an incomplete gear 323, a drive gear 324 and a centering motor 325. The fixed ring frame 321 is fixedly installed on the moving frame 314. The rotating ring frame 322 is rotatably installed on the outside of the fixed ring frame 321, and the incomplete gear 323 is fixedly installed on the rotating ring frame 322. The drive gear 324 is rotatably installed on the moving frame 314, and the incomplete gear 323 is meshed and connected with the drive gear 324. The centering motor 325 is fixedly installed on the lower side of the moving frame 314. The output end of the centering motor 325 is fixedly connected with the drive gear 324.

[0060] The centering module includes a limit sleeve 326, a synchronous frame 327, a centering roller 328 and an extension roller 329. The limit sleeve 326 is rotatably installed on the rotating ring frame 322. The middle part of the synchronous frame 327 is rotatably installed on the fixed ring frame 321, and the outside of the synchronous frame 327 is in limit sliding connection with the limit sleeve 326. The inner end of the synchronous frame 327 is rotatably installed with a centering roller 328. The lower side of the inner end of the synchronous frame 327 is rotatably installed with an extension roller 329. The extension roller 329 is aligned with the centering roller 328.

[0061] The alignment module 33 includes an alignment cylinder 331 and an alignment plate 332. The alignment cylinder 331 is fixedly installed on the moving frame 314, and the output end of the alignment cylinder 331 is fixedly installed with the alignment plate 332.

[0062] As Figures 5 - 7 shown, the lifting connector 4 includes a valve stem connector 41 for connecting the valve stem 71 with an external lifting device and a valve cover connector 42 for connecting the inner valve cover 81 and the upper valve cover 82 with an external lifting device.

[0063] The valve stem connector 41 includes a threaded sleeve 411, a connecting suspension rod 412, a rotating disc 413 and a valve stem hanging disc 414. The threaded sleeve 411 is in threaded connection with the valve stem 71, and the connecting suspension rods 412 are symmetrically arranged on the threaded sleeve 411. One end of the connecting suspension rod 412 is fixedly connected with the threaded sleeve 411, and the other end of the connecting suspension rod 412 is fixedly connected with the rotating disc 413. The rotating disc 413 is rotatably installed on the valve stem hanging disc 414. The valve stem hanging disc 414 is connected with an external lifting device.

[0064] The valve cover connector 42 includes a connecting rod 421, a limit block 422 and a valve cover hanging disc 423. The valve cover hanging disc 423 is connected with an external lifting device. The connecting rods 421 are symmetrically inserted on both sides of the valve cover hanging disc 423. The upper end of the connecting rod 421 is fixedly installed with the limit block 422. The lower side of the connecting rod 421 is provided with an external thread for threaded connection with the connecting hole 91.

[0065] Lifting lugs for connecting with an external lifting device are symmetrically and fixedly installed on the support frame 311.

[0066] In this embodiment, the external hoisting device is connected to the valve stem hanging plate 414, and the threaded sleeve 411 is threadedly connected to the valve stem 71, so that the external hoisting device is connected to the valve stem 71 through the valve stem hanging plate 414, the rotating disc 413, the connecting suspension rod 412 and the threaded sleeve 411; the external hoisting device is connected to the valve cover hanging plate 423 and is threadedly connected to the connecting hole 91 through the connecting rod 421 on the valve cover hanging plate 423, so that the external hoisting device is connected to the inner valve cover 81 and the upper valve cover 82 through the valve cover hanging plate 423, the limiting block 422 and the connecting rod 421;

[0067] The external hoisting device drives the device to move through the lifting lugs on the support frame 311, so that the moving positioning block 224 and the fixed positioning block 225 move to the upper side of the middle part of the valve seat 6, and the conforming positioning frame 231 and the rollers 232 are aligned with both ends of the valve seat 6; the external hoisting device drives the device to gradually move downwards, so that the rollers 232 support on both ends of the valve seat 6, and preliminary positioning is carried out through the conforming positioning frames 231 and the rollers 232 on both sides; then the positioning motor 211 drives the positioning threaded rod 212 to rotate, and the positioning threaded rod 212 drives the moving block 213 to horizontally move under the limiting action of the limiting slider 214 and the limiting chute 215, and the moving block 213 moves to drive the rotating arm 223 to rotate through the connecting frame 221; the rotation of the rotating arm 223 drives the moving positioning block 224 to move until the moving positioning blocks 224 on both sides cooperate with the fixed positioning block 225 to tightly hold the middle part of the valve seat 6; thus, secondary positioning is carried out; at this time, the center of the fixed ring frame 321 on the moving mounting frame 1 coincides with the center of the valve seat 6;

[0068] The external hoisting device drives the valve stem 71 and the valve core 72 to move to the upper side of the valve seat 6 through the valve stem hanging plate 414, the rotating disc 413, the connecting suspension rod 412 and the threaded sleeve 411; operate the moving motor 312 to drive the moving threaded rod 313 to rotate, and the rotation of the moving threaded rod 313 drives the moving frame 314 to vertically move under the limiting action of the centering slider 315 and the guide rail 316; thus, the fixed ring frame 321, the rotating ring frame 322, the synchronous frame 327 and the centering roller 328 are driven to vertically move upwards through the moving frame 314; until the fixed ring frame 321 passes through the lower side of the valve core 72 and moves to the middle part of the valve stem 71; at this time, the centering motor 325 drives the driving gear 324 to rotate, and the rotation of the driving gear 324 drives the rotating ring frame 322 to rotate through the incomplete gear 323; the rotation of the rotating ring frame 322 synchronously drives the limiting sleeve 326 to move, and the limiting sleeve 326 drives the synchronous frame 327 to rotate synchronously, thereby driving the centering roller 328 and the extension roller 329 to rotate synchronously until all the centering rollers 328 tightly hold the valve stem 71; at this time, the centers of the valve stem 71 and the valve core 72 coincide with the center of the valve seat 6; the alignment cylinder 331 drives the alignment plate 332 to move, and the valve core 72 is pushed by the alignment plate 332 to rotate the valve core 72; until the alignment groove 721 on the valve core 72 is aligned with the alignment block 61; the positioning of the valve stem 71 and the valve core 72 is completed;

[0069] The external hoisting device drives the valve stem 71 and the valve core 72 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 to move vertically downward through the moving threaded rod 313 until the alignment block 61 is inserted into the alignment groove 721, completing the assembly of the valve stem 71 and the valve core 72. After the assembly is completed, the threaded sleeve 411, the connecting suspension rod 412, and the rotating disc 413 are rotated until the threaded sleeve 411 disengages from the valve stem 71. The external hoisting device drives the threaded sleeve 411, the connecting suspension rod 412, the rotating disc 413, and the valve stem suspension disc 414 to leave the upper side of the valve seat 6. The centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, causing the synchronous frame 327 and the centering roller 328 to reset.

[0070] The external hoisting device drives the inner valve cover 81 to move to the upper side of the valve seat 6. The moving motor 312 drives the moving frame 314 to move upward through the moving threaded rod 313 until the extension roller 329 aligns with the inner valve cover 81. The centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, thereby driving the synchronous frame 327 to rotate through the limiting sleeve 326 until the centering roller 328 and the extension roller 329 clamp the inner valve cover 81, aligning the center of the inner valve cover 81 with the center of the valve seat 6. Then, the external hoisting device drives the inner valve cover 81 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 and the fixed ring frame 321, the rotating ring frame 322, the limiting sleeve 326, the synchronous frame 327, the centering roller 328, and the extension roller 329 on the moving frame 314 to move vertically downward until the assembly of the inner valve cover 81 is completed.

[0071] Subsequently, after the operator assembles the remaining structural components of the valve, the external hoisting device drives the upper valve cover 82 to move to the upper side of the valve seat 6. The moving motor 312 drives the moving frame 314 to move upward through the moving threaded rod 313 until the extension roller 329 aligns with the upper valve cover 82. The centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, thereby driving the synchronous frame 327 to rotate through the limiting sleeve 326 until the centering roller 328 and the extension roller 329 clamp the upper valve cover 82, aligning the center of the upper valve cover 82 with the center of the valve seat 6. Then, the external hoisting device drives the upper valve cover 82 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 and the fixed ring frame 321, the rotating ring frame 322, the limiting sleeve 326, the synchronous frame 327, the centering roller 328, and the extension roller 329 on the moving frame 314 to move vertically downward until the assembly of the upper valve cover 82 is completed.

[0072] Embodiment 3: In some embodiments, as Figures 1 - 11 shown, as a preferred embodiment of the present invention, a method for using a high-efficiency assembly device for large valves includes the following steps:

[0073] Step 1: Connect the external lifting device to the valve stem lifting plate 414, thread the threaded sleeve 411 onto the valve stem 71, so that the external lifting device is connected to the valve stem 71 through the valve stem lifting plate 414, the rotating plate 413, the connecting suspension rod 412 and the threaded sleeve 411; Connect the external lifting device to the valve cover lifting plate 423, and thread-connect it to the connecting hole 91 through the connecting rod 421 on the valve cover lifting plate 423, so that the external lifting device is connected to the inner valve cover 81 and the upper valve cover 82 through the valve cover lifting plate 423, the limiting block 422 and the connecting rod 421; The external lifting device drives the device to move through the lifting lugs on the support frame 311, so that the movable positioning block 224 and the fixed positioning block 225 move to the upper side of the middle of the valve seat 6, and the conforming positioning frame 231 and the rollers 232 are aligned with both ends of the valve seat 6; The external lifting device drives the device to gradually move downwards, so that the rollers 232 support at both ends of the valve seat 6, and preliminary positioning is carried out through the conforming positioning frames 231 and the rollers 232 on both sides; Then the positioning motor 211 drives the positioning threaded rod 212 to rotate, and the positioning threaded rod 212 drives the moving block 213 to move horizontally under the limiting action of the limiting slider 214 and the limiting chute 215. The moving block 213 moves and drives the rotating arm 223 to rotate through the connecting frame 221; The rotation of the rotating arm 223 drives the movable positioning block 224 to move until the movable positioning blocks 224 on both sides cooperate with the fixed positioning block 225 to tightly hold the middle of the valve seat 6; Thus, secondary positioning is carried out; At this time, the center of the fixed ring frame 321 on the movable mounting frame 1 coincides with the center of the valve seat 6;

[0074] Step 2: The external lifting device drives the valve stem 71 and the valve core 72 to move to the upper side of the valve seat 6 through the valve stem lifting plate 414, the rotating plate 413, the connecting suspension rod 412 and the threaded sleeve 411; Operate the moving motor 312 to drive the moving threaded rod 313 to rotate, and the moving threaded rod 313 rotates to drive the moving frame 314 to move vertically under the limiting action of the centering slider 315 and the guide rail 316; Thus, the fixed ring frame 321, the rotating ring frame 322, the synchronous frame 327 and the centering roller 328 are driven to move vertically upwards through the moving frame 314; Until the fixed ring frame 321 passes through the lower side of the valve core 72 and moves to the middle of the valve stem 71; At this time, the centering motor 325 drives the driving gear 324 to rotate, and the driving gear 324 rotates to drive the rotating ring frame 322 to rotate through the incomplete gear 323; The rotation of the rotating ring frame 322 synchronously drives the limiting sleeve 326 to move, and the limiting sleeve 326 drives the synchronous frame 327 to rotate synchronously, thereby driving the centering roller 328 and the extension roller 329 to rotate synchronously until all the centering rollers 328 tightly hold the valve stem 71; At this time, the centers of the valve stem 71 and the valve core 72 coincide with the center of the valve seat 6; The alignment cylinder 331 drives the alignment plate 332 to move, and the valve core 72 is pushed to rotate by the alignment plate 332; Until the alignment groove 721 on the valve core 72 aligns with the alignment block 61; The positioning of the valve stem 71 and the valve core 72 is completed;

[0075] Step 3: The external hoisting device drives the valve stem 71 and the valve core 72 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 to move vertically downward through the moving threaded rod 313 until the alignment block 61 is inserted into the alignment groove 721; the assembly of the valve stem 71 and the valve core 72 is completed. After the assembly is completed, rotate the threaded sleeve 411, the connecting suspension rod 412, and the rotating disc 413 until the threaded sleeve 411 disengages from the valve stem 71; the external hoisting device drives the threaded sleeve 411, the connecting suspension rod 412, the rotating disc 413, and the valve stem suspension disc 414 to leave the upper side of the valve seat 6; the centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, so that the synchronous frame 327 and the centering roller 328 are reset;

[0076] Step 4: The external hoisting device drives the inner valve cover 81 to move to the upper side of the valve seat 6. The moving motor 312 drives the moving frame 314 to move upward through the moving threaded rod 313 until the extension roller 329 is aligned with the inner valve cover 81; the centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, thereby driving the synchronous frame 327 to rotate through the limiting sleeve 326 until the centering roller 328 and the extension roller 329 clamp the inner valve cover 81, aligning the center of the inner valve cover 81 with the center of the valve seat 6; then the external hoisting device drives the inner valve cover 81 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 and the fixed ring frame 321, the rotating ring frame 322, the limiting sleeve 326, the synchronous frame 327, the centering roller 328, and the extension roller 329 on the moving frame 314 to move vertically downward; until the assembly of the inner valve cover 81 is completed;

[0077] Step 5: Subsequently, after the operator assembles the remaining structural parts of the valve, the external hoisting device drives the upper valve cover 82 to move to the upper side of the valve seat 6. The moving motor 312 drives the moving frame 314 to move upward through the moving threaded rod 313 until the extension roller 329 is aligned with the upper valve cover 82; the centering motor 325 drives the rotating ring frame 322 to rotate through the driving gear 324 and the incomplete gear 323, thereby driving the synchronous frame 327 to rotate through the limiting sleeve 326 until the centering roller 328 and the extension roller 329 clamp the upper valve cover 82, aligning the center of the upper valve cover 82 with the center of the valve seat 6; then the external hoisting device drives the upper valve cover 82 to move vertically downward. At the same time, the moving motor 312 drives the moving frame 314 and the fixed ring frame 321, the rotating ring frame 322, the limiting sleeve 326, the synchronous frame 327, the centering roller 328, and the extension roller 329 on the moving frame 314 to move vertically downward; until the assembly of the upper valve cover 82 is completed.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A large-scale valve high-efficiency assembly device, comprising a movable mounting frame (1), a device positioning component (2) and a centering and positioning mechanism (3), characterized in that: Also included is a lifting connector (4) for connecting the valve stem (71), the inner valve cover (81) and the upper valve cover (82) to an external lifting device; The device positioning assembly (2) is mounted on the mobile mounting frame (1), and the device positioning assembly (2) comprises a positioning drive module (21), a positioning module (22) and a supporting positioning module (23); two groups of positioning modules (22) for holding the valve seat (6) are mounted on the mobile mounting frame (1), and a positioning drive module (21) for driving the two groups of positioning modules (22) is mounted on the mobile mounting frame (1); and a supporting positioning module (23) is mounted on the mobile mounting frame (1); A centering and positioning mechanism (3) for positioning and lowering the valve stem (71), the inner valve cover (81) and the upper valve cover (82) is installed on the upper side of the movable mounting frame (1), and the centering and positioning mechanism (3) comprises a movable module (31), a centering assembly (32) and an alignment module (33); the movable module (31) is installed on the movable mounting frame (1), the movable end of the movable module (31) is installed with the centering assembly (32), and the movable end of the movable module (31) is installed with the alignment module (33); The mobile module (31) comprises a support frame (311), a mobile drive module and a guide module; the support frame (311) is fixedly mounted on the mobile mounting frame (1); the mobile drive module is mounted on the support frame (311); and the guide module for guiding the mobile end of the mobile drive module is mounted on the support frame (311); The mobile drive module comprises a mobile motor (312), a mobile threaded rod (313) and a mobile frame (314); the mobile motor (312) is fixedly mounted on the support frame (311); the mobile threaded rod (313) is rotatably mounted on the support frame (311); the output end of the mobile motor (312) is fixedly connected to the mobile threaded rod (313); and the mobile frame (314) is threadedly connected to the mobile threaded rod (313) via a threaded sleeve; The centering assembly (32) comprises a synchronous drive module and a centering module, the synchronous drive module is mounted on the moving frame (314), and a plurality of sets of centering modules are evenly mounted on the synchronous drive module in a circular array at equal intervals; The synchronous drive module comprises a fixed ring frame (321), a rotating ring frame (322), an incomplete gear (323), a driving gear (324) and a centering motor (325); the fixed ring frame (321) is fixedly mounted on the moving frame (314); the rotating ring frame (322) is rotatably mounted on the outside of the fixed ring frame (321); the incomplete gear (323) is fixedly mounted on the rotating ring frame (322); the driving gear (324) is rotatably mounted on the moving frame (314); the incomplete gear (323) is meshedly connected with the driving gear (324); the centering motor (325) is fixedly mounted on the lower side of the moving frame (314); and the output end of the centering motor (325) is fixedly connected with the driving gear (324).

2. The large valve high-efficiency assembly device according to claim 1 is characterized in that: The positioning drive module (21) comprises a positioning motor (211), a positioning threaded rod (212), a moving block (213) and a limiting slide block (214); the positioning motor (211) is fixedly mounted on the moving mounting frame (1); the positioning threaded rod (212) is rotatably mounted on the moving mounting frame (1); the output end of the positioning motor (211) is fixedly connected to the positioning threaded rod (212); the moving block (213) is threadedly connected to the positioning threaded rod (212) via a threaded sleeve; the limiting slide block (214) is symmetrically fixedly mounted on the moving block (213); the limiting slide grooves (215) are symmetrically provided on the moving mounting frame (1); and the limiting slide block (214) is limitedly slidably connected to the limiting slide groove (215).

3. The large valve high-efficiency assembly device according to claim 2 is characterized in that: The positioning module (22) comprises two groups of synchronous rotation modules, a movable positioning block (224) and a fixed positioning block (225); the synchronous rotation modules are symmetrically mounted on the movable mounting frame (1); the synchronous rotation modules are connected to the movable blocks (213); the movable positioning block (224) is fixedly mounted on the synchronous rotation modules; the fixed positioning block (225) is fixedly mounted on the movable mounting frame (1); and the inner sides of the two movable positioning blocks (224) and the fixed positioning block (225) are located on the same circumference.

4. The large valve high-efficiency assembly device according to claim 3 is characterized in that: The synchronous rotation module comprises a connecting frame (221), a connecting shaft (222) and a rotating arm (223); one end of the connecting frame (221) is rotationally connected to the moving block (213), and the other end of the connecting frame (221) is rotationally connected to one end of the rotating arm (223); the connecting shaft (222) is fixedly mounted on the moving mounting frame (1), the connecting shaft (222) is rotationally connected to the middle part of the rotating arm (223), and the other end of the rotating arm (223) is fixedly mounted with a moving positioning block (224).

5. The large valve efficient assembly device according to claim 4 is characterized in that: The support positioning module (23) comprises a conformable positioning frame (231) and rollers (232); the conformable positioning frame (231) is fixedly mounted on the lower side of the mobile mounting frame (1); and the rollers (232) are evenly mounted in a circular array at equal intervals on the lower side of the conformable positioning frame (231) for rotation.

6. A large valve assembly method, using the large valve efficient assembly device according to claim 5, characterized in that: The following steps are involved: Step 1: The lifting equipment drives the device to move so that the supporting positioning module (23) is supported on both ends of the valve seat (6); the positioning drive module (21) drives the positioning module (22) to hold the middle of the valve seat (6) so that the center of the positioning module (22) is aligned with the center of the valve seat (6); Step 2: The lifting device drives the valve stem (71) to move to the upper side of the valve seat (6) via the lifting connection piece (4); the moving module (31) drives the centering component (32) to move to the middle of the valve stem (71); the centering component (32) clamps the valve stem (71); the alignment module (33) pushes the valve core (72) so that the alignment groove (721) is aligned with the alignment block (61); Step 3: The lifting equipment drives the valve stem (71) and the valve core (72) to move vertically downward under the limiting action of the centering component (32) and the alignment module (33), and at the same time, the moving module (31) drives the centering component (32) and the alignment module (33) to move vertically downward synchronously, so as to assemble the valve stem (71) and the valve core (72) into the valve seat (6); Step 4: The lifting equipment drives the inner valve cover (81) to move to the upper side of the valve seat (6), the moving module (31) drives the centering assembly (32) to move upward, and the centering assembly (32) positions the inner valve cover (81); the lifting equipment drives the inner valve cover (81) to move downward, and the assembly of the inner valve cover (81) is completed; Step 5: After the operator assembles the remaining structural parts of the valve, the lifting equipment drives the upper valve cover (82) to move to the upper side of the valve seat (6), the moving module (31) drives the centering assembly (32) to move upward, and the centering assembly (32) positions the upper valve cover (82); the lifting equipment drives the upper valve cover (82) to move downward, and the assembly of the upper valve cover (82) is completed.

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