Spinning equipment for downdraft-preventing check valve of smoke exhaust pipe

Abstract

The invention relates to the field of production of check valves, and discloses spinning equipment for a downdraft-preventing check valve of a smoke exhaust pipe. The device comprises a machine body, a placing platform connected with the machine body, a stamping die head and a spinning mechanism, the stamping die head is used for stamping an insertion ring groove, the placing platform is provided with a lifting stamping driving part, the lifting stamping driving part is provided with a positioning tool, and the stamping die head is located above the positioning tool; the spinning mechanism comprises a rotating base plate located above the positioning tool and spinning assemblies, the spinning assemblies are movably connected with the rotating base plate, the multiple spinning assemblies are arranged on the outer side of the cover plate ring in the circumferential direction at intervals, and the multiple spinning assemblies are suitable for clamping and bending the cover plate ring; the spinning driving assembly is suitable for driving the rotating base plate to drive the multiple spinning assemblies to rotate with the cover plate ring as a rotating shaft. According to the spinning flanging device, machining of two working procedures can be completed synchronously, the production efficiency is improved, and meanwhile spinning flanging is achieved by being matched with smoke stop valves with different diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of check valve production, in particular to a spinning equipment for a smoke pipe anti-backflow check valve. BACKGROUND

[0002] The smoke pipe check valve is mainly connected with the smoke pipe of a gas water heater to prevent smoke backflow caused by wind. Figure 1 The smoke pipe check valve comprises a first pipe body 5, a second pipe body 6 and a cover ring 7, the first pipe body 5 is of stainless steel, one end of the first pipe body 5 is provided with an expanded section (one section of the first pipe body 5 is expanded by an expanding equipment so that the inner diameter and the outer diameter of the first pipe body 5 are increased), the inner diameter of the expanded section is larger than the outer diameter of the second pipe body 6, the cover ring 7 covers the expanded section, a one-way valve cover is hinged to the side of the cover ring 7 close to the inside of the expanded section, the second pipe body 6 is inserted into the cover ring 7 at one end and is suspended at the other end to facilitate the insertion connection with the smoke pipe; the one-way valve cover can cover the opening at one end of the second pipe body 6 inserted into the expanded section to prevent smoke backflow.

[0003] In order to facilitate production, the first pipe body 5, the second pipe body 6, the one-way valve cover and the cover ring 7 are all produced in parts. During production, the cover ring 7 is first inwardly punched and bent by a punching and bending device to form an insertion ring groove 71 on the side of the cover ring 7 close to the second pipe body 6, thereby facilitating the subsequent insertion of the smoke pipe on the second pipe body 6 and improving the sealing effect; then the cover ring 7 is manually transported to another device to punch and bend the outer edge of the cover ring 7 to an angle of 45° towards the first pipe body 5. During assembly, the one-way valve cover and the cover plate are first hingedly connected together to form a module; since the side of the cover plate away from the second pipe body 6 forms an inner convex ring after being punched and bent, the inner convex ring formed in the cover ring 7 is inserted into the expanded section during assembly, at this time the outer edge of the cover ring 7 is bent at an angle of 45° and located outside the expanded section, then the assembled first pipe body 5 and cover ring 7 are placed on the corresponding bending and flanging device, the bending and flanging device drives the outer edge of the cover ring 7 to bend at an angle of 45° and wrap around the outer wall of the expanded section, and finally the second pipe body 6 is inserted into the cover ring 7 and the three are welded and fixed. The above-mentioned production and assembly of the first pipe body 5 and the cover ring 7 have many steps, and manual transportation is required after each step, which is lagging, and manual feeding and discharging during each step will increase the processing time, affecting the production efficiency. SUMMARY

[0004] To solve at least one aspect of the above problems, the application provides a spinning device for a smoke exhaust pipe anti-backdraft check valve, which comprises a machine body, a placing platform connected with the machine body, a stamping die head and a spinning mechanism. The stamping die head is used for stamping out a plug-in ring groove. The spinning mechanism is used for bending the flanging of the outer edge of the cover ring to wrap the outer wall of the first pipe body flared section. The placing platform is provided with a lifting stamping driving element. The lifting stamping driving element is detachably provided with a positioning tool for placing the first pipe body. The stamping die head is located above the positioning tool. The lifting stamping driving element is suitable for driving the positioning tool to drive the first pipe body and the cover ring to move close to or away from the stamping die head. The spinning mechanism comprises a rotating base plate and a spinning assembly located above the positioning tool. The spinning assembly is movably connected with the rotating base plate. A plurality of groups of the spinning assembly are circumferentially spaced apart on the outer side of the cover ring. The plurality of groups of the spinning assembly are suitable for clamping and bending the cover ring. The machine body is provided with a spinning driving assembly. The spinning driving assembly is suitable for driving the rotating base plate to drive the plurality of groups of the spinning assembly to rotate around the cover ring as the rotating shaft to make the flanging of the cover ring wrap the outer wall of the first pipe body flared section.

[0005] Optionally, the rotating machine body is provided with a guide rail. The placing platform is connected with the guide rail and is suitable for sliding in the vertical direction. The bottom of the placing platform is connected with a lifting adjustment driving element. The lifting adjustment driving element is connected with the rotating machine body to be suitable for driving the placing platform to lift and support the placing platform. The lifting stamping driving element moves synchronously with the placing platform.

[0006] Optionally, the spinning assembly comprises a hinged rotating element and a spinning die head. The hinged rotating element is hingedly connected with the rotating base plate. The spinning die head is rotationally connected with the hinged rotating element. When the hinged rotating element is driven to move relative to the rotating base plate, the spinning die head is driven to move close to or away from the cover ring.

[0007] Optionally, the outer wall of the spinning die head is provided with an annular spinning ring groove. The flanging of the outer edge of the cover ring is suitable for being inserted into the spinning ring groove. The lower part of the spinning ring groove is provided with a guide and displacement inclined surface. The guide and displacement inclined surface gradually inclines towards the direction close to the outer wall of the rotating base plate from the top to the bottom direction. The guide and displacement inclined surface extends to the groove bottom of the spinning ring groove.

[0008] Optionally, the hinged rotating element comprises a linkage shaft, a first connecting rod and a second connecting rod. The linkage shaft is rotationally and insertingly installed at the eccentric position of the rotating base plate. The first connecting rod and the second connecting rod are respectively located on the upper and lower sides of the rotating base plate and are synchronously rotationally connected with the linkage shaft. The top of the rotating base plate is provided with an elastic element. The elastic element is suitable for driving the first connecting rod to rotate to make the spinning die head move away from the cover ring.

[0009] Optionally, the machine body is connected with a spinning fitting assembly, the spinning fitting assembly comprises a lifting cylinder, a driving circular plate and a lifting driving element, the driving circular plate is detachably fixedly installed at the bottom of the lifting cylinder; a plurality of first protrusions are circumferentially spaced apart on the outer wall of the driving circular plate, the plurality of first protrusions are adapted to be matched with the plurality of articulated rotating elements respectively, to drive the plurality of articulated rotating elements to rotate synchronously, so that the spinning die head is close to the cover plate ring for spinning, the lifting driving element is connected with the lifting cylinder to drive the lifting cylinder to drive the driving circular plate to lift, so that the first protrusions and the articulated rotating elements are matched or matched.

[0010] Optionally, the outer wall of the driving circular plate is also circumferentially spaced apart with a plurality of second protrusions and third protrusions, the number of the second protrusions is the same as that of the articulated rotating elements, the length of the second protrusions is less than that of the first protrusions, the length of the third protrusions is less than that of the second protrusions.

[0011] Optionally, the machine body is rotatably provided with a transmission shaft, the rotating base plate is sleeved on the transmission shaft and rotates synchronously with the transmission shaft, the spinning driving assembly comprises a rotating driving element, the rotating driving element is connected with the transmission shaft to drive the transmission shaft to drive the rotating base plate to rotate, the lifting cylinder and the driving circular plate are both sleeved on the transmission shaft; the outer wall of the transmission shaft is provided with a linkage key, the inner wall of the driving circular plate is circumferentially spaced apart to be provided with a first key groove, a second key groove and a third key groove for inserting the linkage key; when the first protrusions are matched with the articulated rotating elements, the linkage key is inserted into the first key groove; when the second protrusions are matched with the articulated rotating elements, the linkage key is inserted into the second key groove; when the third protrusions are matched with the articulated rotating elements, the linkage key is inserted into the third key groove.

[0012] Optionally, the inner wall of the driving circular plate is also provided with a rotating ring groove, the first key groove, the second key groove and the third key groove are all located below the rotating ring groove and communicate with the rotating ring groove; when the rotating adjustment of the driving circular plate is not needed, the control module controls the lifting height of the driving circular plate to be less than the length of the corresponding key groove, to ensure that the linkage key is always matched with the corresponding key groove; when the rotating adjustment of the driving circular plate is needed, the control module controls the lifting height of the driving circular plate to be greater than the length of the corresponding key groove, so that the linkage key is inserted into the rotating ring groove, to ensure that the driving circular plate rotates relative to the transmission shaft.

[0013] Optionally, the spinning fitting assembly further comprises a hinged frame, the lifting drive is a hydraulic cylinder, the middle part of the hinged frame is hingedly installed on the machine body, one end of the hinged frame is hingedly connected with the telescopic rod of the hydraulic cylinder, the other end of the hinged frame is symmetrically hingedly provided with two hinged blocks, the side of the two hinged blocks close to each other is provided with a rotating insertion slot, the rotating insertion slot penetrates through the hinged block in the front-rear direction, the slot wall of the rotating insertion slot is provided with a ceramic sheet, the outer wall of the lifting cylinder is integrally formed with an outer convex ring, and the outer convex ring is rotatably inserted into the two rotating insertion slots; the hinged frame is adapted to drive the two hinged blocks to lift the lifting cylinder after rotating; the spinning drive assembly further comprises a driving pulley, a driven pulley and a transmission belt, the driven pulley is sleeved on the transmission shaft and rotates synchronously with the transmission shaft, the driving pulley is connected with the rotating drive to rotate, and the transmission belt is sleeved on the driving pulley and the driven pulley to drive the driving pulley to rotate; the driven pulley is located above the lifting cylinder, the top of the lifting cylinder is provided with a conical column, the bottom of the driven pulley is provided with a conical groove for inserting the conical column, and when the outer circumferential wall of the conical column is in close contact with the circumferential groove wall of the conical groove, the spinning die head is adapted to drive the outer flange of the cover plate ring to be bent.

[0014] Compared with the prior art, the beneficial technical effects of the present application are:

[0015] 1. When the stamping die head is stamping and bending the cover plate ring to form the plug-in ring groove, the multiple spinning drive assemblies clamp and limit the cover plate ring to ensure that the cover plate ring is not bent as a whole and inserted into the first pipe body, and rotating the cover plate drives the multiple spinning drive assemblies to rotate, so that the outer flange of the cover plate ring is bent and wrapped around the outer wall of the first pipe body, thereby simultaneously completing two process steps, reducing the time for manual transfer, feeding and discharging in one of the steps, and improving production efficiency.

[0016] 2. After the outer flange of the cover plate ring is inserted into the spinning ring groove of the spinning die head, the spinning die head tends to press down the cover plate ring, so that the cover plate ring is not bent as a whole in the first pipe body under the stamping of the stamping die head, but the outer flange is retained outside the first pipe body to facilitate wrapping around the first pipe body after spinning.

[0017] 3、By setting the first, second and third protrusions with different protruding lengths, the distance from the spinning die head to the rotating base plate axis can be controlled, and then the spinning flanging is adapted to the smoke stop valve with different diameters, when the corresponding protrusion position is adjusted, the driving disc can be lowered to the corresponding position of the linkage key and the rotating ring groove, then the driving disc is adjusted, the linkage key is inserted into the corresponding key groove, after that, the operation program is restored, the linkage key will not be out of the corresponding key groove during the lifting and lowering process of the driving disc, which not only plays a role in directional movement, but also has the effect of synchronous rotation of the driving disc and the transmission shaft;

[0018] 4、The hinged frame can ensure that the installation position of the lifting driving part does not interfere with the rotating mechanism, and also ensures that the lifting cylinder and the driving disc can be adjusted according to the needs. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole sectional view of the smoke exhaust pipe check valve processed in the embodiment of the application;

[0020] Figure 2 It is the structure of the spinning equipment in the embodiment of the application Figure 1 ;

[0021] Figure 3 It is the structure of the spinning equipment in the embodiment of the application Figure 2 ;

[0022] Figure 4 It is the structure of the spinning mechanism, the spinning driving assembly and the spinning matching assembly in the embodiment of the application Figure 1 ;

[0023] Figure 5 It is the structure of the spinning mechanism, the spinning driving assembly and the spinning matching assembly in the embodiment of the application Figure 2 ;

[0024] Figure 6 It is an exploded view of the spinning assembly in the embodiment of the application;

[0025] Figure 7 It is a sectional view of the spinning die head and the cover ring matching state in the embodiment of the application;

[0026] Figure 8 It is a structural view of the spinning matching assembly in the embodiment of the application;

[0027] Figure 9 It is a structural view of the spinning matching assembly and the transmission shaft in the embodiment of the application;

[0028] Figure 10 It is a sectional view of the driven pulley and the spinning matching assembly in the embodiment of the application.

[0029] Explanation of reference signs: 1, machine body; 11, placing platform; 12, stamping die head; 13, lifting stamping driving piece; 14, positioning tool; 15, transmission shaft; 151, linkage key; 2, spinning mechanism; 21, rotating base plate; 22, spinning assembly; 23, hinged rotating piece; 24, spinning die head; 241, spinning ring groove; 25, linkage shaft; 26, first connecting rod; 27, second connecting rod; 28, elastic piece; 3, spinning driving assembly; 31, rotating driving piece; 32, driving pulley; 33, driven pulley; 4, spinning matching assembly; 41, lifting cylinder; 411, conical column; 42, driving circular plate; 421, first convex part; 422, second convex part; 423, third convex part; 424, rotating ring groove; 43, lifting driving piece; 44, hinged frame; 45, hinged block; 5, first pipe body; 6, second pipe body; 7, cover plate ring; 71, plug-in ring groove. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following will be combined with the accompanying drawings to further describe the present application. Figures 1-10 The present application is further described in detail.

[0031] Reference Figure 1 For the need of processing the smoke exhaust pipe check valve, which includes a first pipe body 5, a second pipe body 6 and a cover plate ring 7 of stainless steel material, one end of the first pipe body 5 is provided with an expanded section (by expanding the first pipe body 5 for a section, so that the inner diameter and the outer diameter become larger), the inner diameter of the expanded section is larger than the outer diameter of the second pipe body 6, the cover plate ring 7 is shielded on the expanded section, the cover plate ring 7 is hinged with a one-way valve cover on the side close to the inside of the expanded section, the second pipe body 6 is inserted into the cover plate ring 7 at one end, and the other end is suspended to facilitate plug-in connection with the smoke pipe. The one-way valve cover can shield the opening of the second pipe body 6 inserted into one end of the expanded section to prevent backflow of smoke. The side of the cover plate close to the second pipe body 6 forms a plug-in ring groove 71, which facilitates subsequent plug-in of the smoke pipe on the second pipe body 6 and improves the sealing effect. When the first pipe body 5 and the cover plate ring 7 are processed, the outer edge of the cover plate ring 7 is punched and bent towards the first pipe body 5 to form a 45° inclined flange. After the cover plate ring 7 is buckled on the flange, the cover plate ring 7 will be preliminarily positioned due to the inclined setting of the flange, and will not shift due to equipment vibration. In addition, the thickness of the cover plate ring 7 is less than the thickness of the first pipe body 5, so that the cover plate ring 7 will deform first when the cover plate ring 7 and the first pipe body 5 are subjected to the same pressure.

[0032] The embodiment of the present application provides a spinning equipment for the smoke exhaust pipe anti-backflow check valve, which is described below with reference to the accompanying drawings. Figures 2 to 4The spinning equipment of the smoke exhaust pipe anti-backdraft valve includes a machine body 1, a placing platform 11 connected with the machine body 1, a punching die head 12 and a spinning mechanism 2. The punching die head 12 is used for punching a plug-in ring groove, and the spinning mechanism 2 is used for bending and wrapping the flanging of the outer edge of the cover ring on the outer wall of the first pipe body flared section. The placing platform 11 is provided with a lifting punching driving element 13 (preferably a hydraulic cylinder in the embodiment), and a positioning tool 14 for placing the first pipe body is detachably installed on the telescopic rod of the lifting punching driving element 13. The punching die head 12 is located above the positioning tool 14, and the lifting punching driving element 13 is suitable for driving the positioning tool 14 to move the first pipe body and the cover ring to approach or move away from the punching die head 12, thereby realizing punching. The spinning mechanism 2 includes a rotating base plate 21 located above the positioning tool 14 and a spinning assembly 22 movably connected with the rotating base plate 21. The spinning assembly 22 is circumferentially and spaced apart from the outer side of the cover ring, and the plurality of spinning assemblies 22 are suitable for clamping and bending the cover ring. The machine body 1 is provided with a spinning driving assembly 3, which is suitable for driving the rotating base plate 21 to rotate the plurality of spinning assemblies 22 with the cover ring as the rotating shaft, so that the flanging of the cover ring is wrapped on the outer wall of the first pipe body flared section.

[0033] A guide rail is fixedly installed on the lower half of the front side of the rotating machine body 1, and the extending direction of the guide rail is the vertical direction. The rear side of the placing platform 11 is slidably installed on the guide rail, so that the placing platform 11 can be stably oriented and moved in the vertical direction for adjustment, thereby adapting to the processing of valves of different lengths. The bottom of the placing platform 11 is connected with a lifting adjustment driving element, which is preferably a hydraulic cylinder in the embodiment. The telescopic rod of the hydraulic cylinder is fixedly connected with the placing platform 11 through bolts, and the cylinder body of the hydraulic cylinder is fixedly connected with the rotating machine body 1 through bolts, thereby supporting the placing platform 11 and enabling the lifting of the placing platform 11 by the hydraulic oil to be accurately controlled. The lifting punching driving element 13 moves synchronously with the placing platform 11.

[0034] Referring to Figures 2 to 4 A circular positioning slot is formed in the top of the positioning tool 14 for inserting the first pipe body away from the side of the cover ring, and the outer wall of the first pipe body is attached to the slot wall. The positioning tool 14 is fixedly connected with the telescopic rod of the lifting punching driving element 13 through bolts, so that when valves of different diameters are processed, the positioning tool 14 suitable therefor can be replaced, and the cylinder body of the lifting punching driving element 13 is fixedly installed on the placing platform 11 through bolts.

[0035] Referring to Figures 3 to 5, the punch die head 12 is located at the bottom of the rotating base plate 21 and is arranged concentrically with the rotating base plate 21, and the top of the punch die head 12 is detachably fixed with a transmission shaft 15, and the transmission shaft 15 is rotatably installed on the rotating body 1. The rotating base plate 21 is sleeved on the transmission shaft 15 and is key-connected with the transmission shaft 15 to realize synchronous rotation. The spinning driving assembly 3 comprises a rotating driving member 31, a driving pulley 32, a driven pulley 33 and a transmission belt. The rotating driving member 31 is a motor, which is fixedly installed on the rotating body 1 by bolts, and the driving pulley 32 is connected with the motor shaft of the rotating driving member 31; the driven pulley 33 is located above the rotating base plate 21, and is sleeved on the transmission shaft 15 and is key-connected with the transmission shaft 15 to realize synchronous rotation; the transmission belt is sleeved on the driving pulley 32 and the driven pulley 33, and drives the driving pulley 32 to rotate and then drives the driven pulley 33 to rotate, so as to drive the transmission shaft 15 to rotate and drive the rotating base plate 21 to rotate.

[0036] Referring to Figures 4 to 6 , the spinning assembly 22 comprises four hinged rotating members 23 and four spinning dies 24, which are uniformly and circumferentially arranged around the punch die head 12, thereby forming four-point clamping positioning on the cover plate ring. The hinged rotating member 23 is hingedly connected with the rotating base plate 21, and the spinning die 24 is rotatably connected with the hinged rotating member 23. When the hinged rotating member 23 is driven to move relative to the rotating base plate 21, the spinning die is adapted to be driven to move towards or away from the cover plate ring, thereby clamping and bending or loosening the cover plate ring.

[0037] The hinged rotating member 23 comprises a linkage shaft 25, a first connecting rod 26 and a second connecting rod 27. The linkage shaft 25 is rotatably inserted and installed at the eccentric position of the rotating base plate 21, and the first connecting rod 26 and the second connecting rod 27 are respectively located on the upper and lower sides of the rotating base plate 21 and are connected with the linkage shaft 25 to rotate synchronously; the first connecting rod 26 and the second connecting rod 27 are staggered, i.e. there is an included angle between the first connecting rod 26 and the second connecting rod 27. The spinning die 24 is rotatably installed on the second connecting rod 27, and the spinning die 24 is driven to move towards or away from the punch die head 12 by driving the first connecting rod 26 to move.

[0038] Referring to Figures 5 to 7 , the outer wall of the spinning die 24 is provided with an annular spinning ring groove 241, and the flange of the outer edge of the cover plate ring is adapted to be inserted into the spinning ring groove 241. A guide displacement inclined surface is provided below the spinning ring groove 241, which gradually inclines towards the outer wall of the rotating base plate 21 in the direction from top to bottom, and extends to the groove bottom of the spinning ring groove 241. When the punch die head 12 punches the cover plate ring, the outer flange of the cover plate ring will be inserted into the spinning ring groove, and then the spinning module will form a downward locking and positioning on the cover plate ring, so as to ensure that the outer flange of the cover plate ring will not enter the first pipe body under the pressure of the punch.

[0039] Reference Figures 4 to 6 The top of the rotating base plate 21 is provided with elastic elements 28, the number of which is the same as the number of the first connecting rods 26 and corresponds one-to-one. In this embodiment, the elastic elements 28 are preferably springs. The top of the rotating base plate 21 is also provided with abutment plates, the same number of which correspond one-to-one with the elastic elements 28. The abutment plates are located on the side of the elastic elements 28 away from the first connecting rods 26. The side of the first connecting rods 26 near the elastic elements 28 has a spring hole for inserting one end of the elastic elements 28. A spring post for sleeved on the other end of the elastic elements 28 is integrally formed on the abutment plate. Under the action of the elastic elements 28, the first connecting rods 26 always tend to rotate towards the drive shaft 15, thereby causing the spinning die head 24 to rotate away from the stamping die head 12, thus keeping the cover ring in a normally loose state.

[0040] Reference Figure 3 and Figure 5 The spinning machine body 1 is connected to a spinning engagement assembly 4, which can drive multiple spinning assemblies 22 to operate synchronously, so that multiple spinning die heads 24 move synchronously to clamp or release the cover plate ring.

[0041] Combination Figure 5 Reference Figure 8 and Figure 9 The spinning assembly 4 includes a lifting cylinder 41, a driving disc 42, and a lifting drive component 43 (preferably a hydraulic cylinder in this embodiment). The driving disc 42 is located at the bottom of the lifting cylinder 41 and is detachably fixed to the lifting cylinder 41 by bolts. The lifting drive component 43 is connected to the lifting cylinder 41 to drive the lifting cylinder 41 to move the driving disc 42 up and down. Multiple sets of driving protrusions are evenly arranged on the outer circumferential wall of the driving disc 42. A bearing is rotatably mounted on the top of the first connecting rod 26. After the driving disc 42 rises, the driving protrusions and the bearing engage to drive the spinning die head 24 towards the cover ring for spinning. Since four spinning dies 24 are provided in this embodiment, four sets of driving protrusions are provided. To facilitate better engagement between the driving protrusions and the bearings after the driving disc 42 rises, the lower outer edge of the driving protrusions is provided with an inclined surface (not shown in the figure). After the drive plate 42 descends, the drive protrusion will disengage from the bearing, and the first connecting rod will automatically rotate and reset under the action of the elastic element 28.

[0042] Reference Figures 5 to 9Each set of driving protrusions includes a first protrusion 421, a second protrusion 422, and a third protrusion 423 arranged at intervals. The length of the second protrusion 422 is shorter than that of the first protrusion 421, and the length of the third protrusion 423 is shorter than that of the second protrusion 422. By adjusting the engagement of the first protrusion 421, the second protrusion 422, or the third protrusion 423 with the bearing on the first connecting rod 26, the distance from the spinning die head 24 to the axis of the rotating base plate 21 can be controlled, thereby adapting to smoke-stop valves of different diameters to achieve spinning and flanging. In order to make the distance between the spinning die head 24 and the stamping die head 12 longer after the driving circular plate 42 descends and disengages from the first connecting rod 26, the interval between the first protrusion 421, the second protrusion 422, and the third protrusion 423 will be larger. Thus, two driving circular plates 42 are arranged downwards at intervals, and the adjacent set of driving protrusions on the two driving circular plates 42 are spaced 90 degrees apart.

[0043] The outer wall of the drive shaft 15 is provided with a linkage key 151. The inner wall of the lowest-end drive circular plate 42 is circumferentially spaced with a first keyway, a second keyway, and a third keyway for the linkage key 151 to be inserted, thereby enabling the drive shaft 15 and the drive circular plate 42 to rotate synchronously. When the first protrusion 421 engages with the hinged rotating member 23, the linkage key 151 is inserted into the first keyway; when the second protrusion 422 engages with the hinged rotating member 23, the linkage key 151 is inserted into the second keyway; and when the third protrusion 423 engages with the hinged rotating member 23, the linkage key 151 is inserted into the third keyway. When it is not necessary to rotate and adjust the drive circular plate 42, the control module controls the lifting of the drive member 43. The lifting height of the drive circular plate 42 is less than the length of the corresponding keyway, ensuring that the linkage key 151 always engages with the corresponding keyway, thus achieving both directional movement and synchronous rotation of the drive circular plate 42 and the drive shaft 15.

[0044] Reference Figures 5 to 10 The inner wall of the lowest driving circular plate 42 is also provided with a rotating annular groove 424. The first keyway, the second keyway, and the third keyway are all located below the rotating annular groove 424 and communicate with it. When it is necessary to rotate and adjust the driving circular plate 42, the control module controls the driving circular plate 42 to descend to a height greater than the length of the corresponding keyway, so that the linkage key 151 is inserted into the rotating annular groove 424, ensuring that the driving circular plate 42 rotates relative to the transmission shaft 15. Afterwards, the running program is resumed so that the linkage key 151 does not dislodge from the corresponding keyway during the lifting and lowering of the driving circular plate 42.

[0045] The spinning assembly 4 also includes a hinge frame 44, the middle of which is hinged to the machine body 1 via a hinge shaft. The cylinder body of the hydraulic cylinder (lifting drive 43) is fixed to the machine body 1 by bolts. One end of the hinge frame 44 is hinged to the telescopic rod of the hydraulic cylinder (lifting drive 43). The other end of the hinge frame 44 is symmetrically hinged to two hinge blocks 45. A rotating slot is provided on the side of the two hinge blocks 45 that are close to each other. The rotating slot passes through the hinge block 45 in the front-back direction. That is, the cross-section of the hinge block 45 is U-shaped after rotating 90 degrees. The outer wall of the lifting cylinder 41 is integrally formed with an outer protruding ring, which is rotatably inserted into the two rotating slots. When the telescopic rod of the hydraulic cylinder (lifting drive 43) extends or retracts, it drives the hinge frame 44 to drive the lifting cylinder 41 and the driving plate 42 to rise or fall, thereby driving the first connecting rod to rotate. In addition, it will not affect the rotation of the lifting cylinder 41. Each wall of the rotating slot is covered with a ceramic sheet by strong adhesive, which reduces the friction between the outer convex ring and the hinge block 45 when the lifting cylinder 41 rotates, thus improving its service life.

[0046] Reference Figures 5 to 10 The lifting cylinder 41 is located below the driven pulley 33. A conical column 411 is integrally formed on the top of the lifting cylinder 41, with the smaller outer diameter end of the conical column 411 positioned at the top. A conical groove is provided at the bottom of the driven pulley 33 for the conical column 411 to be inserted into and fitted. When the lifting drive 43 drives the lifting cylinder 41 upwards, so that the outer circumferential wall of the conical column 411 is completely in close frictional contact with the circumferential wall of the conical groove, the corresponding protrusion cooperates with the first connecting rod 26 to drive the spinning die head 24 to bend the outer flange of the cover ring, so that the outer flange fits against the outside of the first tube body. The close frictional contact between the conical column 411 and the conical groove provides a synchronous rotational driving force for the lifting cylinder 41; it also shares some of the torsional force with the linkage key 151, preventing the linkage key 151 from breaking or deforming due to concentrated force.

[0047] The implementation principle of the spinning device for the anti-backdraft valve of the exhaust pipe in this application embodiment is as follows: First, insert the end of the first pipe body away from the cover ring into the positioning slot of the positioning fixture 14, and then fasten the cover ring to the flared end of the first pipe body, and make the outer flange of the cover ring tilt downward. Then, the lifting and stamping drive 13 drives the positioning fixture 14 to lift the first tube and the cover ring. When the cover ring is about to contact the stamping die 12, the lifting drive 43 drives the lifting cylinder 41 to lift the driving plate 42, so that the corresponding protrusion cooperates with the first connecting rod 26 to drive multiple spinning dies 24 to move closer to each other synchronously, so that the outer flange of the cover ring is located in the spinning ring groove 241. Then, the multiple spinning dies 24 continue to move closer to bend the outer flange of the cover ring. At the same time, the rotation drive 31 drives the transmission shaft 15 to rotate the rotating base plate and multiple rotating dies, so that the entire outer flange of the cover ring wraps around the first tube. At the same time, the stamping die 12 will stamp the cover ring to form an insertion ring groove. Finally, the lifting and stamping drive 13 drives the positioning fixture 14 and the product to descend, thus completing the processing of two processes in one go.

[0048] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this disclosure, unless otherwise explicitly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A spinning device for a backdraft prevention valve for exhaust pipes, characterized in that: The device includes a body (1), a placement platform (11) connected to the body (1), a stamping die (12), and a spinning mechanism (2). The stamping die (12) is used to stamp out the insertion ring groove. The spinning mechanism (2) is used to bend the outer edge of the cover ring and wrap it around the outer wall of the flared section of the first tube. The placement platform (11) is equipped with a lifting stamping drive (13). The lifting stamping drive (13) is detachably equipped with a positioning fixture (14) for placing the first tube. The stamping die (12) is located above the positioning fixture (14). The lifting stamping drive (13) is adapted to drive the positioning fixture (14) to move the first tube and the cover ring closer or further away. The movement away from the stamping die (12); the spinning mechanism (2) includes a rotating base plate (21) located above the positioning fixture (14) and a spinning assembly (22). The spinning assembly (22) is movably connected to the rotating base plate (21). Multiple sets of spinning assemblies (22) are arranged circumferentially on the outer side of the cover ring. The multiple sets of spinning assemblies (22) are suitable for clamping and bending the cover ring. The machine body (1) is equipped with a spinning drive assembly (3). The spinning drive assembly (3) is suitable for driving the rotating base plate (21) to drive multiple spinning assemblies (22) to rotate around the cover ring as the rotation axis, so that the outer flange of the cover ring is wrapped around the outer wall of the first tube flared section.

2. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 1, characterized in that: The rotating body (1) is provided with a guide rail, the placement platform (11) is connected to the guide rail and is adapted to slide in the vertical direction, the bottom of the placement platform (11) is connected to a lifting adjustment drive, the lifting adjustment drive is connected to the rotating body (1) to drive the placement platform (11) to rise and fall and support the placement platform (11), and the lifting stamping drive (13) moves synchronously with the placement platform (11).

3. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 1, characterized in that: The spinning assembly (22) includes a hinged rotating member (23) and a spinning die (24). The hinged rotating member (23) is hinged to the rotating base plate (21), and the spinning die (24) is rotatably connected to the hinged rotating member (23). When the hinged rotating member (23) is driven to move relative to the rotating base plate (21), it is suitable for driving the spinning die to move closer to or away from the cover ring.

4. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 3, characterized in that: The outer wall of the spinning die head (24) is provided with an annular spinning ring groove (241). The flange of the outer edge of the cover plate ring is suitable for insertion into the spinning ring groove (241). A guide relief slope is provided below the spinning ring groove (241). The guide relief slope gradually slopes towards the outer wall of the rotating base plate (21) from top to bottom, and the guide relief slope extends to the bottom of the spinning ring groove (241).

5. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 3, characterized in that: The hinged rotating component (23) includes a linkage shaft (25), a first connecting rod (26), and a second connecting rod (27). The linkage shaft (25) is rotatably inserted and installed at the eccentric position of the rotating base plate (21). The first connecting rod (26) and the second connecting rod (27) are located on the upper and lower sides of the rotating base plate (21) respectively, and are synchronously connected to the linkage shaft (25). The top of the rotating base plate (21) is provided with an elastic element (28). The elastic element (28) is adapted to drive the first connecting rod (26) to rotate so that the spinning die head (24) moves away from the cover plate ring.

6. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 3, characterized in that: The body (1) is connected to a spinning fitting assembly (4), which includes a lifting cylinder (41), a driving disc (42), and a lifting drive component (43). The driving disc (42) is detachably and fixedly installed at the bottom of the lifting cylinder (41). The outer wall of the driving disc (42) is provided with a plurality of first protrusions (421) spaced apart in the circumferential direction. The plurality of first protrusions (421) are adapted to cooperate with a plurality of hinged rotating components (23) respectively, driving the plurality of hinged rotating components (23) to rotate synchronously, so that the spinning die head (24) approaches the cover plate ring for spinning. The lifting drive component (43) is connected to the lifting cylinder (41) to drive the lifting cylinder (41) to drive the driving disc (42) to rise and fall, so that the first protrusions (421) and the hinged rotating components (23) cooperate or disengage.

7. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 6, characterized in that: The outer wall of the driving circular plate (42) is also provided with a second protrusion (422) and a third protrusion (423) at circumferential intervals, the same number as the hinge rotating member (23). The length of the second protrusion (422) is less than that of the first protrusion (421), and the length of the third protrusion (423) is less than that of the second protrusion (422).

8. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 7, characterized in that: The machine body (1) is rotatably provided with a drive shaft (15). The rotating base plate (21) is sleeved on the drive shaft (15) and rotates synchronously with the drive shaft (15). The spinning drive assembly (3) includes a rotation drive component (31). The rotation drive component (31) is connected to the drive shaft (15) to drive the drive shaft (15) to drive the rotating base plate (21) to rotate. The lifting cylinder (41) and the driving disc (42) are both sleeved on the drive shaft (15). The outer wall of the drive shaft (15) is provided with a linkage key (151). The inner wall of the driving circular plate (42) is circumferentially spaced with a first keyway, a second keyway, and a third keyway for inserting the linkage key (151); when the first protrusion (421) cooperates with the hinge rotating member (23), the linkage key (151) is inserted in the first keyway; when the second protrusion (422) cooperates with the hinge rotating member (23), the linkage key (151) is inserted in the second keyway; when the third protrusion (423) cooperates with the hinge rotating member (23), the linkage key (151) is inserted in the third keyway.

9. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 8, characterized in that: The inner wall of the drive disc (42) is also provided with a rotating annular groove (424). The first keyway, the second keyway and the third keyway are all located below the rotating annular groove (424) and communicate with the rotating annular groove (424). When the drive disc (42) does not need to be rotated for adjustment, the control module controls the lifting height of the drive disc (42) to be less than the length of the corresponding keyway, so as to ensure that the linkage key (151) always cooperates with the corresponding keyway. When the drive disc (42) needs to be rotated for adjustment, the control module controls the lowering height of the drive disc (42) to be greater than the length of the corresponding keyway, so that the linkage key (151) is inserted into the rotating annular groove (424), ensuring that the drive disc (42) rotates relative to the transmission shaft (15).

10. The spinning device for the backdraft prevention valve of the exhaust pipe according to claim 8, characterized in that: The spinning assembly (4) also includes a hinge frame (44), the lifting drive (43) is a hydraulic cylinder, the middle part of the hinge frame (44) is hinged to the machine body (1), one end of the hinge frame (44) is hinged to the telescopic rod of the hydraulic cylinder, and the other end of the hinge frame (44) is symmetrically hinged to two hinge blocks (45). A rotating slot is provided on the side of the two hinge blocks (45) that are close to each other. The rotating slot passes through the hinge block (45) in the front-back direction. A ceramic plate is provided on the groove wall of the rotating slot. The outer wall of the lifting cylinder (41) is integrally formed with an outer protruding ring. The outer protruding ring is rotatably inserted into the two rotating slots. After the hinge frame (44) rotates, it is suitable to drive the two hinge blocks (45) to drive the lifting cylinder (41) to rise and fall. The spinning drive assembly (3) further includes a drive pulley (32), a driven pulley (33), and a transmission belt. The driven pulley (33) is sleeved on the transmission shaft (15) and rotates synchronously with the transmission shaft (15). The drive pulley (32) is connected to the rotation drive member (31) to achieve rotation. The transmission belt is sleeved on the drive pulley (32) and the driven pulley (33), driving the drive pulley (32) to drive the driven pulley (33). The wheel (33) rotates; the driven pulley (33) is located above the lifting cylinder (41), the top of the lifting cylinder (41) is provided with a conical column (411), and the bottom of the driven pulley (33) is provided with a conical groove for the conical column (411) to be inserted and adapted. When the outer peripheral wall of the conical column (411) is completely in close contact with the circumferential groove wall of the conical groove, it is suitable for driving the spinning die head (24) to bend the outer flange of the cover plate ring.

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