Butterfly valve inner valve seat machining device and machining method

Abstract

The invention belongs to the technical field of valve seat polishing and grinding, and particularly relates to a machining device and method for a valve seat in a butterfly valve, and the machining device comprises a workbench, a transmission assembly, a flushing assembly and a grinding assembly; the polishing assembly comprises a hollow shaft and a polishing sleeve, the transmission assembly comprises a motor and a transmission box, the motor is installed in the transmission box and drives the polishing assembly and the flushing assembly to rotate, and the liquid supply assembly is installed in the transmission box and connected with the flushing assembly. The air cylinder stretches out, the push-pull rod drives the push rod to move leftwards, the push rod drives the first push block and the second push block to move synchronously through the lantern ring, fixing of the grinding sleeve by the fixing assembly is relieved, along with movement of the push-pull rod, a protruding block on the push-pull rod jacks up one half shaft sleeve, the half shaft sleeves drive the inner ring plate to move through the supporting plate, and the grinding sleeve is made to be separated from the grinding face; the grinding sleeve is separated from the hole wall, metal scraps on the grinding face are directly washed by cutting fluid, and abrasion of the metal scraps to the grinding face is reduced.

Description

Technical Field

[0001] This invention belongs to the field of valve seat polishing and grinding technology, specifically relating to a butterfly valve inner valve seat processing device and processing method. Background Technology

[0002] The valve seat is a crucial component of a butterfly valve, its primary function being to achieve a seal and prevent fluid leakage. Installed inside the valve body, it fits tightly against the disc when the disc rotates to the closed position, thus blocking the flow of media. Its sealing performance directly affects the overall performance and safety of the valve.

[0003] During valve seat production, the inner hole of the valve seat is first milled out using a milling machine. After milling, it is transferred to the grinding process, where a grinding device grinds the inner hole of the valve seat to ensure its smoothness. Existing grinding devices use a grinding head for operation. The debris generated during grinding mainly adheres to the hole wall and the grinding head. Therefore, it is necessary to use a cutting fluid flushing component to flush out the debris inside the hole, as illustrated in invention patent publication number CN116787247A.

[0004] During the grinding of the valve seat inner hole, the grinding head is in constant contact with the hole wall. If debris enters between the grinding head and the hole wall, the cutting fluid cannot directly penetrate into the grinding surface between the grinding head and the hole wall, making it difficult to rinse the grinding surface and causing the grinding surface to wear more severely. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a butterfly valve inner seat processing device and processing method to solve the technical problems in the prior art.

[0006] The objective of this invention can be achieved through the following technical solution: a butterfly valve inner seat processing device, comprising a worktable and a grinding table mounted on the worktable, a transmission assembly slidably mounted on the worktable, the transmission assembly connecting a flushing assembly and a grinding assembly, and a valve seat fixing bracket mounted on the grinding table; the grinding assembly comprising a hollow shaft and a grinding sleeve, the transmission assembly comprising a motor and a transmission box, the motor being installed inside the transmission box, the motor driving the grinding assembly and the flushing assembly to rotate, a liquid supply assembly being installed inside the transmission box, the liquid supply assembly being connected to the flushing assembly, a guide block being mounted on the hollow shaft, and an inner ring plate being mounted on the inner wall of the grinding sleeve, the inner ring plate and the grinding sleeve being connected... A guide groove is reserved between the guide blocks and the guide blocks slide in the guide groove. The guide blocks are connected to the inner wall of the grinding sleeve by a spring. A cylinder is installed inside the transmission box. The output end of the cylinder is connected to a push-pull rod. The push-pull rod passes through the flushing assembly and the grinding assembly in sequence. A fixing assembly is installed on the inner ring plate. The push-pull rod is connected to the fixing assembly through an adapter sleeve and a push rod. The top and bottom of the inner ring plate are respectively connected to two half-shaft sleeves by support plates. A magnet is installed between the two half-shaft sleeves. The push-pull rod slides in the half-shaft sleeves. A protrusion is fixedly installed on the push-pull rod. The protrusion engages with one of the half-shaft sleeves. As the push-pull rod and the protrusion move synchronously, the protrusion pushes the grinding sleeve away from the hole wall by engaging with the half-shaft sleeve.

[0007] As a further optimization or improvement of this solution, the fixing component includes push block 1 and push block 2 respectively disposed on both sides of the inner ring plate. A sliding groove 1 is opened on one side of the inner ring plate. A slider 1 is slidably installed inside the sliding groove 1. A guide sleeve 1 is installed at the bottom of the slider 1. A guide post 1 is slidably installed inside the guide sleeve 1. A push block 1 is installed at the bottom of the guide post 1. An inclined rod 1 is installed at the bottom of the push block 1. The inclined rod 1 is slidably engaged with the inclined groove platform on the hollow shaft.

[0008] As a further optimization or improvement of this solution, a second sliding groove is opened on the other side of the inner ring plate, a second slider is slidably installed in the second sliding groove, a second guide sleeve is installed at the bottom of the second slider, a second guide post is slidably installed inside the second guide sleeve, a second push block is fixedly installed at the bottom of the second guide post, a second inclined rod is installed at the top of the second push block, and the second inclined rod cooperates with the inclined surface on one side of the hollow shaft; both the first push block and the second push block are fitted with a collar, and a push rod is installed on the collar.

[0009] As a further optimization or improvement of this solution, the rinsing assembly includes a spray pipe with an outlet hole. A front plug plate is installed inside the spray pipe, and the front plug plate is connected to a rear circular plate via a rubber sleeve. A push ring is fixedly installed on the push-pull rod, and a guide rod is slidably installed on the push ring. Electromagnetic chuck one and electromagnetic chuck two are respectively installed at both ends of the guide rod. Magnetic block one and magnetic block two are respectively installed on the front plug plate and the rear circular plate. When electromagnetic chuck one is energized, it attracts magnetic block one, and when electromagnetic chuck two is energized, it attracts magnetic block two.

[0010] As a further optimization or improvement to this solution, the liquid supply assembly includes a hydraulic pump installed inside the transmission box. The hydraulic pump is connected to the liquid supply head through a pipeline, and the liquid supply head is fixedly installed on the front plug plate.

[0011] As a further optimization or improvement of this solution, a slot is provided on the rear circular plate, and a retractable insert is installed inside the slot. A transverse groove is provided on the spray pipe, and the insert slides inside the transverse groove. A rotating sleeve is fitted on the outer wall of the spray pipe, and a helical groove is provided inside the rotating sleeve. The insert slides in conjunction with the helical groove. The through holes on the rotating sleeve are larger than the liquid outlet holes, and the through holes are arranged at an angle. The gap between the through holes of the rotating sleeve is smaller than the gap between the liquid outlet holes.

[0012] As a further optimization or improvement of this solution, a plug block is slidably installed in the slot. The plug block is connected to the inner wall of the slot by a spring. A bolt is installed on the plug block. A longitudinal groove is opened on the rear circular plate, and the bolt slides in the longitudinal groove.

[0013] As a further optimization or improvement of this solution, a guide rail is installed on the workbench, the guide rail is slidably connected to the guide table, and a transmission component is installed on the guide table.

[0014] A method for machining the inner seat of a butterfly valve, the method being applied to the butterfly valve inner seat machining apparatus as described above, the method comprising the following steps: Step S1: Fix the workpiece to be polished on the polishing table using a clamp. Drive the polishing assembly into the hole through the cooperation of the guide rail and the guide table. Start the motor. The motor drives the flushing assembly and the polishing assembly to rotate. Polish the hole wall through the polishing sleeve. At the same time, the liquid supply assembly provides cutting fluid to the inside of the spray pipe. The cutting fluid flushes the hole wall through the liquid outlet on the spray pipe. Step S2: During the grinding of the valve seat inner hole, if metal chips enter the grinding surface between the grinding sleeve and the hole wall, the cylinder extends, the push rod drives the push rod to move, and the push rod drives the push block one and push block two to move synchronously through the collar, thereby releasing the fixing component from fixing the grinding sleeve; Step S3: As the push-pull rod moves, the protrusion on the push-pull rod lifts one of the half-shaft sleeves. The half-shaft sleeve drives the inner ring plate to move through the support plate, causing the grinding sleeve to separate from the grinding surface, thus separating the grinding sleeve from the hole wall and allowing the cutting fluid to directly wash away the metal debris on the grinding surface. Step S4: As the grinding assembly rotates, the metal debris attached to the grinding sleeve is thrown off by inertial force, thereby cleaning the metal debris attached to the grinding sleeve. Step S5: As the push-pull rod moves, it drives the front plug plate to move synchronously. As the front plug plate moves, it blocks part of the liquid outlet, which increases the water pressure of the cutting fluid inside the spray pipe and accelerates the flushing force.

[0015] The beneficial effects of this invention are: (1) In this invention, the cylinder extends and the push rod drives the push rod to move to the left. The push rod drives the push block one and the push block two to move synchronously through the collar, releasing the fixing component from fixing the grinding sleeve. As the push rod moves, the protrusion on the push rod lifts one of the half-shaft sleeves. The half-shaft sleeve drives the inner ring plate to move through the support plate, causing the grinding sleeve to separate from the grinding surface, causing the grinding sleeve to separate from the hole wall, so that the cutting fluid can directly wash the metal chips on the grinding surface, reducing the wear of the metal chips on the grinding surface.

[0016] (2) As the grinding assembly rotates, the metal debris attached to the grinding sleeve is thrown off by inertial force, thereby cleaning the metal debris attached to the grinding sleeve. At the same time, as the push-pull rod moves, the push-pull rod drives the front plug plate to move synchronously. Through the movement of the front plug plate, the front plug plate blocks part of the liquid outlet hole, causing the cutting fluid water pressure inside the spray pipe to increase and accelerate the flushing force.

[0017] (3) In this invention, the push-pull rod is connected to the rear circular plate by means of the magnetic suction block 2 adsorbing the electromagnetic chuck 2. Then, the insert block is pushed so that the insert block passes through the transverse groove and engages with the spiral groove on the inner wall of the rotating sleeve. As the push-pull rod drives the rear circular plate to move synchronously, the rear circular plate first drives the rotating sleeve to be sleeved on the liquid outlet hole through the insert block. As the push-pull rod continues to move, the rear circular plate drives the rotating sleeve to rotate through the insert block, so that the through holes on the rotating sleeve coincide with the liquid outlet hole one by one. At the same time, the push-pull rod pushes the front plug plate to move through the push ring, so that the front plug plate compresses the gas inside the spray pipe. By compressing the gas inside the spray pipe, it impacts the liquid outlet hole one by one, thereby cleaning each liquid outlet hole. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of the transmission assembly.

[0021] Figure 3 This is a schematic diagram of the connection structure between the transmission assembly, the flushing assembly, and the grinding assembly.

[0022] Figure 4 This is a schematic diagram of the internal structure of the grinding and rinsing components.

[0023] Figure 5 This is a schematic diagram of the internal structure of the polishing component.

[0024] Figure 6 for Figure 5 Enlarged view of the structure of part A.

[0025] Figure 7 for Figure 5 Enlarged view of the structure of part B.

[0026] Figure 8 This is a schematic diagram of the half-shaft sleeve structure.

[0027] Figure 9 for Figure 8 Enlarged view of the structure of part C.

[0028] Figure 10 This is a schematic diagram of the internal structure of the spray pipe.

[0029] Figure 11 for Figure 10 Enlarged view of the structure of part D.

[0030] Figure 12 This is a schematic diagram of the rotating structure.

[0031] Figure 13 This is a schematic diagram of a helical groove structure.

[0032] The diagram indicates: 1. Worktable; 2. Grinding table; 3. Guide rail; 4. Guide table; 5. Transmission components; 501. Motor; 502. Transmission box; 503. Drive gear; 504. Driven gear ring; 505. Cylinder; 506. Push-pull rod; 6. Grinding assembly; 601. Hollow shaft; 602. Grinding sleeve; 603. Inner ring plate; 604. Support plate; 605. Half-shaft sleeve; 606. Protrusion; 607. Adapter sleeve; 608. Push rod; 609. Collar; 610. Spring II; 611. Guide block; 612. Guide groove; 613. Magnet; 7. Liquid supply assembly; 701. Hydraulic pump; 702. Liquid supply head; 8. Flushing assembly; 801. Spray pipe; 802. Front stopper plate; 803. Rubber sleeve; 804. Rear circular plate; 805. Push ring; 806. Guide rod; 807. Electromagnetic chuck II; 808. Electromagnetic chuck I; 809. Magnetic block I; 810. Magnetic block II; 811. Rotating sleeve; 812. Liquid outlet; 813. Horizontal groove; 814. Helical groove; 815. Slot; 816. Spring I; 817. Longitudinal groove; 818. Insert block; 819. Bolt; 9. Fixed components; 901. Push block one; 902. Push block two; 903. Inclined groove platform; 904. Slide groove one; 905. Slider one; 906. Guide sleeve one; 907. Guide post one; 908. Inclined rod two; 909. Slide groove two; 910. Slider two; 911. Guide sleeve two; 912. Guide post two; 913. Inclined rod one. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] See Figures 1-9 A butterfly valve inner seat processing device includes a worktable 1 and a grinding table 2 mounted on the worktable 1. A transmission assembly 5 is slidably mounted on the worktable 1, connecting a flushing assembly 8 and a grinding assembly 6. A valve seat fixing bracket is mounted on the grinding table 2. The grinding assembly 6 includes a hollow shaft 601 and a grinding sleeve 602. The transmission assembly 5 includes a motor 501 and a transmission box 502. The motor 501 is installed inside the transmission box 502, driving the grinding assembly 6 and the flushing assembly 8 to rotate. A liquid supply assembly 7 is installed inside the transmission box 502, connected to the flushing assembly 8. A guide block 611 is mounted on the hollow shaft 601. An inner ring plate 603 is installed on the inner wall of the grinding sleeve 602, with a guide groove 612 reserved between the inner ring plate 603 and the grinding sleeve 602. The guide block 611 slides with the guide groove 612. 11. A spring 610 connects to the inner wall of the grinding sleeve 602; a cylinder 505 is installed inside the transmission box 502, and the output end of the cylinder 505 is connected to a push-pull rod 506. The push-pull rod 506 passes through the flushing assembly 8 and the grinding assembly 6 in sequence. A fixing assembly 9 is installed on the inner ring plate 603. The push-pull rod 506 is connected to the fixing assembly 9 through an adapter sleeve 607 and a push rod 608. The top and bottom of the inner ring plate 603 are respectively connected to two half-shaft sleeves 605 through a support plate 604. A magnet 613 is installed between the two half-shaft sleeves 605. The push-pull rod 506 slides with the half-shaft sleeves 605. A protrusion 606 is fixedly installed on the push-pull rod 506, and the protrusion 606 cooperates with one of the half-shaft sleeves 605. As the push-pull rod 506 and the protrusion 606 move synchronously, the protrusion 606 pushes the grinding sleeve 602 away from the hole wall by cooperating with the half-shaft sleeve 605.

[0035] Specifically, the fixing component 9 includes push block 901 and push block 902 respectively disposed on both sides of the inner ring plate 603. A sliding groove 904 is opened on one side of the inner ring plate 603. A slider 905 is slidably installed inside the sliding groove 904. A guide sleeve 906 is installed at the bottom of the slider 905. A guide post 907 is slidably installed inside the guide sleeve 906. A push block 901 is installed at the bottom of the guide post 907. A diagonal rod 913 is installed at the bottom of the push block 901. The diagonal rod 913 is slidably engaged with the inclined groove platform 903 on the hollow shaft 601.

[0036] Specifically, a second sliding groove 909 is provided on the other side of the inner ring plate 603. A second sliding block 910 is slidably installed in the second sliding groove 909. A second guide sleeve 911 is installed at the bottom of the second sliding block 910. A second guide post 912 is slidably installed inside the second guide sleeve 911. A second push block 902 is fixedly installed at the bottom of the second guide post 912. A second inclined rod 908 is installed at the top of the second push block 902. The second inclined rod 908 cooperates with the inclined surface on one side of the hollow shaft 601. A collar 609 is sleeved on both the first push block 901 and the second push block 902. A push rod 608 is installed on the collar 609.

[0037] Specifically, a guide rail 3 is installed on the workbench 1, the guide rail 3 is slidably connected to the guide table 4, and a transmission assembly 5 is installed on the guide table 4.

[0038] It should be noted that, see Figures 5-7 The present invention enables the grinding sleeve 602 and the hollow shaft 601 to be movably connected by the guide groove 612 between the grinding sleeve 602 and the inner ring plate 603 slidingly engaging with the guide block 611 on the hollow shaft 601.

[0039] Diagonal brace 1 (913) and diagonal brace 2 (908) are installed at an angle. Diagonal brace 1 (913) is installed at an upward angle, and diagonal brace 2 (908) is installed at a downward angle. See the initial state. Figure 6 When cylinder 505 retracts, push rod 506 moves push rod 608, causing slider 905 to slide to the rightmost side of slide groove 904. With the cooperation of inclined platform 903 and inclined rod 913, inclined rod 913 drives push block 901 and guide post 907 downwards. Guide post 907 stretches the spring inside guide sleeve 906. When guide post 907 slides to the bottom of guide sleeve 906, guide post 907 applies tension to grinding sleeve 602 through guide sleeve 906 and slider 905, thereby fixing grinding sleeve 602 and one side of inner ring plate 603 to hollow shaft 601. (See also...) Figure 7 Similarly, slider 2 910 moves to the rightmost side of slide groove 2 909, and engages with the inclined surface of hollow shaft 601 through inclined rod 2 908. Guide post 2 912 drives guide sleeve 2 911 to move down. Guide post 2 912 applies tension to inner ring plate 603 and grinding sleeve 602 through guide sleeve 2 911, thereby fixing the other side of grinding sleeve 602 and inner ring plate 603 to hollow shaft 601.

[0040] The workpiece to be polished is fixed on the polishing table 2 by a clamp. The polishing assembly 6 is driven into the hole by the cooperation of the guide rail 3 and the guide table 4. The motor 501 is started, and the motor 501 drives the drive gear 503 to rotate. Through the meshing of the drive gear 503 and the driven gear ring 504, the motor 501 drives the flushing assembly 8 and the polishing assembly 6 to rotate. The hole wall is polished by the polishing sleeve 602. At the same time, the liquid supply assembly 7 provides cutting fluid to the inside of the liquid spray pipe 801. The cutting fluid flushes the hole wall through the liquid outlet hole 812 on the liquid spray pipe 801.

[0041] During the grinding of the valve seat inner hole, if metal chips enter the grinding surface between the grinding sleeve 602 and the hole wall, the cylinder 505 extends, and the push rod 506 drives the push rod 608 to move to the left. The push rod 608 drives the push block 901 and the push block 902 to move synchronously through the collar 609, releasing the fixing component 9 from fixing the grinding sleeve 602. As the push rod 506 moves, the protrusion 606 on the push rod 506 lifts one of the half-shaft sleeves 605. The half-shaft sleeve 605 drives the inner ring plate 603 to move through the support plate 604, causing the grinding sleeve 602 to separate from the grinding surface. The present invention promotes the separation of the grinding sleeve 602 from the hole wall by separating the grinding sleeve 602 from the grinding surface, so that the cutting fluid can directly wash away the metal chips on the grinding surface, reducing the wear of the grinding surface by the metal chips. As the grinding assembly 6 rotates, the metal debris attached to the grinding sleeve 602 is thrown off by inertia, thus cleaning the metal debris attached to the grinding sleeve 602. At the same time, as the push-pull rod 506 moves, the push-pull rod 506 drives the front plug plate 802 to move synchronously. Through the movement of the front plug plate 802, the front plug plate 802 blocks part of the liquid outlet hole 812, causing the cutting fluid water pressure inside the spray pipe 801 to increase, accelerating the flushing force, and quickly removing the metal debris thrown on the hole wall and the debris on the grinding surface.

[0042] See Figures 10-13 The rinsing assembly 8 includes a spray pipe 801 with an outlet hole 812. A front stopper plate 802 is installed inside the spray pipe 801. The front stopper plate 802 is connected to a rear circular plate 804 via a rubber sleeve 803. A push ring 805 is fixedly installed on the push-pull rod 506. A guide rod 806 is slidably installed on the push ring 805. An electromagnetic chuck 1 808 and an electromagnetic chuck 2 807 are respectively installed at both ends of the guide rod 806. A magnetic block 1 809 and a magnetic block 2 810 are respectively installed on the front stopper plate 802 and the rear circular plate 804. The electromagnetic chuck 1 808 is energized to attract the magnetic block 1 809, and the electromagnetic chuck 2 807 is energized to attract the magnetic block 2 810.

[0043] Specifically, the liquid supply assembly 7 includes a hydraulic pump 701 installed inside the transmission box 502. The hydraulic pump 701 is connected to the liquid supply head 702 through a pipeline. The liquid supply head 702 is fixedly installed on the front plug plate 802.

[0044] Specifically, a slot 815 is provided on the rear circular plate 804, and a retractable insert 818 is installed inside the slot 815. A transverse groove 813 is provided on the spray pipe 801, and the insert 818 slides inside the transverse groove 813. A rotating sleeve 811 is fitted on the outer wall of the spray pipe 801, and a helical groove 814 is provided inside the rotating sleeve 811. The insert 818 slides in conjunction with the helical groove 814. The through holes on the rotating sleeve 811 are larger than the liquid outlet holes 812, and the through holes are arranged at an angle. The gap between the through holes of the rotating sleeve 811 is smaller than the gap between the liquid outlet holes 812.

[0045] Specifically, a plug block 818 is slidably installed in the slot 815. The plug block 818 is connected to the inner wall of the slot 815 by a spring 816. A bolt 819 is installed on the plug block 818. A longitudinal groove 817 is opened on the rear circular plate 804. The bolt 819 slides in the longitudinal groove 817.

[0046] It should be noted that, in the initial state, see Figure 10 When the electromagnetic chuck 808 is energized, it attracts the magnetic block 809, which connects the push-pull rod 506 to the front plug plate 802. At this time, the push-pull rod 506 drives the front plug plate 802 to move. As the front plug plate 802 moves, it blocks part of the liquid outlet hole 812, which increases the water pressure of the cutting fluid inside the spray pipe 801 and accelerates the flushing force.

[0047] Since cutting fluid needs to be filtered and recycled, the reused cutting fluid will inevitably have residual tiny debris that cannot be filtered out. This debris can easily clog the outlet hole 812. Based on this, the present invention de-energizes the electromagnetic chuck 808 and energizes the electromagnetic chuck 807. The electromagnetic chuck 807 attracts the magnetic block 810, which connects the push-pull rod 506 to the rear circular plate 804. Then, the insert block 818 is pushed so that it passes through the transverse groove 813 and engages with the helical groove 814 on the inner wall of the rotating sleeve 811. As the push-pull rod 506 moves the rear circular plate 804 synchronously, the rear circular plate 804 first moves the rotating sleeve 811 onto the outlet hole 812 through the insert block 818. As the push-pull rod 506 continues to move, the rear circular plate 804 drives the rotating sleeve 811 to rotate through the insert block 818, so that the through holes on the rotating sleeve 811 coincide with the liquid outlet holes 812 one by one. At the same time, the push-pull rod 506 pushes the front plug plate 802 to move through the push ring 805, so that the front plug plate 802 compresses the gas inside the spray pipe 801. The compressed gas inside the spray pipe 801 impacts the liquid outlet holes 812 one by one, thereby cleaning each liquid outlet hole 812.

[0048] Please see Figures 1-8 As shown, the present invention provides a method for machining the inner valve seat of a butterfly valve. The method is applied to the butterfly valve inner valve seat machining apparatus described in the above embodiments, and includes the following steps: Step S1: Fix the workpiece to be polished on the polishing table 2 using a clamp. Drive the polishing assembly 6 into the hole through the cooperation of the guide rail 3 and the guide table 4. Start the motor 501. The motor 501 drives the flushing assembly 8 and the polishing assembly 6 to rotate. Polish the hole wall through the polishing sleeve 602. At the same time, the liquid supply assembly 7 supplies cutting fluid to the inside of the liquid spray pipe 801. The cutting fluid flushes the hole wall through the liquid outlet 812 on the liquid spray pipe 801. Step S2: During the grinding of the valve seat inner hole, if metal chips enter the grinding surface between the grinding sleeve 602 and the hole wall, the cylinder 505 extends, the push rod 506 drives the push rod 608 to move, and the push rod 608 drives the push block 901 and the push block 902 to move synchronously through the collar 609, thereby releasing the fixing component 9 from fixing the grinding sleeve 602. Step S3: As the push-pull rod 506 moves, the protrusion 606 on the push-pull rod 506 lifts one of the half-shaft sleeves 605. The half-shaft sleeve 605 drives the inner ring plate 603 to move through the support plate 604, causing the grinding sleeve 602 to separate from the grinding surface, thus separating the grinding sleeve 602 from the hole wall and allowing the cutting fluid to directly wash away the metal chips on the grinding surface. Step S4: As the grinding assembly 6 rotates, the metal debris attached to the grinding sleeve 602 is thrown off by inertial force, thereby cleaning the metal debris attached to the grinding sleeve 602. Step S5: As the push-pull rod 506 moves, the push-pull rod 506 drives the front plug plate 802 to move synchronously. As the front plug plate 802 moves, the front plug plate 802 blocks part of the liquid outlet hole 812, which increases the cutting fluid water pressure inside the spray pipe 801 and accelerates the flushing force.

[0049] The implementation principle of this invention is as follows: In the initial state, see Figure 6 When cylinder 505 retracts, push rod 506 moves push rod 608, causing slider 905 to slide to the rightmost side of slide groove 904. With the cooperation of inclined platform 903 and inclined rod 913, inclined rod 913 drives push block 901 and guide post 907 downwards. Guide post 907 stretches the spring inside guide sleeve 906. When guide post 907 slides to the bottom of guide sleeve 906, guide post 907 applies tension to grinding sleeve 602 through guide sleeve 906 and slider 905, thereby fixing grinding sleeve 602 and one side of inner ring plate 603 to hollow shaft 601. (See also...) Figure 7 Similarly, slider 2 910 moves to the rightmost side of slide groove 2 909, and engages with the inclined surface of hollow shaft 601 through inclined rod 2 908. Guide post 2 912 drives guide sleeve 2 911 to move down. Guide post 2 912 applies tension to inner ring plate 603 and grinding sleeve 602 through guide sleeve 2 911, thereby fixing the other side of grinding sleeve 602 and inner ring plate 603 to hollow shaft 601.

[0050] The workpiece to be polished is fixed on the polishing table 2 by a clamp. The polishing assembly 6 is driven into the hole by the cooperation of the guide rail 3 and the guide table 4. The motor 501 is started, and the motor 501 drives the drive gear 503 to rotate. Through the meshing of the drive gear 503 and the driven gear ring 504, the motor 501 drives the flushing assembly 8 and the polishing assembly 6 to rotate. The hole wall is polished by the polishing sleeve 602. At the same time, the liquid supply assembly 7 provides cutting fluid to the inside of the liquid spray pipe 801. The cutting fluid flushes the hole wall through the liquid outlet hole 812 on the liquid spray pipe 801.

[0051] During the grinding of the valve seat inner hole, if metal chips enter the grinding surface between the grinding sleeve 602 and the hole wall, the cylinder 505 extends, and the push rod 506 drives the push rod 608 to move to the left. The push rod 608 drives the push block 901 and the push block 902 to move synchronously through the collar 609, releasing the fixing component 9 from fixing the grinding sleeve 602. As the push rod 506 moves, the protrusion 606 on the push rod 506 lifts one of the half-shaft sleeves 605. The half-shaft sleeve 605 drives the inner ring plate 603 to move through the support plate 604, causing the grinding sleeve 602 to separate from the grinding surface. The present invention promotes the separation of the grinding sleeve 602 from the hole wall by separating the grinding sleeve 602 from the grinding surface, so that the cutting fluid can directly wash away the metal chips on the grinding surface, reducing the wear of the grinding surface by the metal chips. As the grinding assembly 6 rotates, the metal debris attached to the grinding sleeve 602 is thrown off by inertia, thus cleaning the metal debris attached to the grinding sleeve 602. At the same time, as the push-pull rod 506 moves, the push-pull rod 506 drives the front plug plate 802 to move synchronously. Through the movement of the front plug plate 802, the front plug plate 802 blocks part of the liquid outlet hole 812, causing the cutting fluid water pressure inside the spray pipe 801 to increase, accelerating the flushing force, and quickly removing the metal debris thrown on the hole wall and the debris on the grinding surface.

[0052] It should be noted that since the cutting fluid needs to be filtered and recycled, the reused cutting fluid will inevitably have residual tiny debris that cannot be filtered out. This debris is very likely to clog the outlet hole 812. Based on this, the present invention de-energizes the electromagnetic chuck 808 and energizes the electromagnetic chuck 807. The electromagnetic chuck 807 attracts the magnetic block 810, which connects the push-pull rod 506 to the rear circular plate 804. Then, the insert block 818 is pushed so that it passes through the transverse groove 813 and engages with the helical groove 814 on the inner wall of the rotating sleeve 811. As the push-pull rod 506 moves the rear circular plate 804 synchronously, the rear circular plate 804 first moves the rotating sleeve 811 onto the outlet hole 812 through the insert block 818. As the push-pull rod 506 continues to move, the rear circular plate 804 drives the rotating sleeve 811 to rotate through the insert block 818, so that the through holes on the rotating sleeve 811 coincide with the liquid outlet holes 812 one by one. At the same time, the push-pull rod 506 pushes the front plug plate 802 to move through the push ring 805, so that the front plug plate 802 compresses the gas inside the spray pipe 801. The compressed gas inside the spray pipe 801 impacts the liquid outlet holes 812 one by one, thereby cleaning each liquid outlet hole 812.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A butterfly valve inner seat machining device, characterized in that: Includes a workbench (1) and a grinding table (2) mounted on the workbench (1), wherein a transmission assembly (5) is slidably mounted on the workbench (1), the transmission assembly (5) is connected to a flushing assembly (8) and a grinding assembly (6), and a valve seat fixing bracket is mounted on the grinding table (2); The grinding assembly (6) includes a hollow shaft (601) and a grinding sleeve (602). The transmission assembly (5) includes a motor (501) and a transmission box (502). The motor (501) is installed inside the transmission box (502). The motor (501) drives the grinding assembly (6) and the rinsing assembly (8) to rotate. The liquid supply assembly (7) is installed inside the transmission box (502). The liquid supply assembly (7) is connected to the rinsing assembly (8). A guide block (611) is installed on the hollow shaft (601). An inner ring plate (603) is installed on the inner wall of the grinding sleeve (602). A guide groove (612) is reserved between the inner ring plate (603) and the grinding sleeve (602). The guide block (611) slides with the guide groove (612). The guide block (611) is connected to the inner wall of the grinding sleeve (602) by a spring (610). A cylinder (505) is installed inside the transmission box (502). The output end of the cylinder (505) is connected to a push-pull rod (506). The push-pull rod (506) passes through the flushing assembly (8) and the grinding assembly (6) in sequence. A fixing assembly (9) is installed on the inner ring plate (603). The push-pull rod (506) is connected to the fixing assembly (9) through an adapter sleeve (607) and a push rod (608). The top and bottom of the inner ring plate (603) are respectively connected to two supports (604). A half-shaft sleeve (605) is provided, and a magnet (613) is installed between the two half-shaft sleeves (605). A push-pull rod (506) is slidably engaged with the half-shaft sleeve (605). A protrusion (606) is fixedly installed on the push-pull rod (506), and the protrusion (606) engages with one of the half-shaft sleeves (605). As the push-pull rod (506) and the protrusion (606) move synchronously, the protrusion (606) pushes the grinding sleeve (602) away from the hole wall by engaging with the half-shaft sleeve (605).

2. The butterfly valve inner seat processing device according to claim 1, characterized in that: The fixing component (9) includes push block 1 (901) and push block 2 (902) respectively disposed on both sides of the inner ring plate (603). A sliding groove 1 (904) is opened on one side of the inner ring plate (603). A slider 1 (905) is slidably installed inside the sliding groove 1 (904). A guide sleeve 1 (906) is installed at the bottom of the slider 1 (905). A guide post 1 (907) is slidably installed inside the guide sleeve 1 (906). A push block 1 (901) is installed at the bottom of the guide post 1 (907). A diagonal rod 1 (913) is installed at the bottom of the push block 1 (901). The diagonal rod 1 (913) is slidably engaged with the inclined groove platform (903) on the hollow shaft (601).

3. The butterfly valve inner seat processing device according to claim 2, characterized in that: The inner ring plate (603) has a second sliding groove (909) on the other side. A second slider (910) is slidably installed in the second sliding groove (909). A second guide sleeve (911) is installed at the bottom of the second slider (910). A second guide post (912) is slidably installed inside the second guide sleeve (911). A second push block (902) is fixedly installed at the bottom of the second guide post (912). A second inclined rod (908) is installed at the top of the second push block (902). The second inclined rod (908) is engaged with the inclined surface on one side of the hollow shaft (601). A collar (609) is sleeved on both the first push block (901) and the second push block (902). A push rod (608) is installed on the collar (609).

4. The butterfly valve inner seat processing device according to claim 1, characterized in that: The flushing assembly (8) includes a spray pipe (801), an outlet hole (812) is opened on the spray pipe (801), a front plug plate (802) is installed inside the spray pipe (801), the front plug plate (802) is connected to the rear circular plate (804) through a rubber sleeve (803), a push ring (805) is fixedly installed on the push rod (506), a guide rod (806) is slidably installed on the push ring (805), an electromagnetic chuck one (808) and an electromagnetic chuck two (807) are respectively installed at both ends of the guide rod (806), a magnetic block one (809) and a magnetic block two (810) are respectively installed on the front plug plate (802) and the rear circular plate (804), the electromagnetic chuck one (808) is energized to attract the magnetic block one (809), and the electromagnetic chuck two (807) is energized to attract the magnetic block two (810).

5. The butterfly valve inner seat processing device according to claim 4, characterized in that: The liquid supply assembly (7) includes a hydraulic pump (701) installed inside the transmission box (502). The hydraulic pump (701) is connected to the liquid supply head (702) through a pipeline. The liquid supply head (702) is fixedly installed on the front plug plate (802).

6. The butterfly valve inner seat processing device according to claim 5, characterized in that: A slot (815) is provided on the rear circular plate (804), and a retractable insert (818) is installed inside the slot (815). A transverse groove (813) is provided on the spray pipe (801), and the insert (818) slides inside the transverse groove (813). A rotating sleeve (811) is fitted on the outer wall of the spray pipe (801), and a helical groove (814) is provided inside the rotating sleeve (811). The insert (818) and the helical groove (814) are slidably engaged. The through holes on the rotating sleeve (811) are larger than the liquid outlet holes (812), and the through holes are arranged at an angle. The gap between the through holes of the rotating sleeve (811) is smaller than the gap between the liquid outlet holes (812).

7. The butterfly valve inner seat processing device according to claim 6, characterized in that: The insert (818) is slidably installed in the slot (815). The insert (818) is connected to the inner wall of the slot (815) by a spring (816). A bolt (819) is installed on the insert (818). A longitudinal groove (817) is opened on the rear circular plate (804). The bolt (819) slides in the longitudinal groove (817).

8. The butterfly valve inner seat processing device according to claim 1, characterized in that: The workbench (1) is equipped with a guide rail (3), which is slidably connected to the guide platform (4). The guide platform (4) is equipped with a transmission assembly (5).

9. A method for machining the inner valve seat of a butterfly valve, characterized in that, The method is applied to the butterfly valve inner seat machining apparatus as described in any one of claims 1-8 above, and the method includes the following steps: Step S1: Fix the workpiece to be polished on the polishing table (2) using a clamp. Drive the polishing assembly (6) into the hole through the cooperation of the guide rail (3) and the guide table (4). Start the motor (501). The motor (501) drives the flushing assembly (8) and the polishing assembly (6) to rotate. Polish the hole wall through the polishing sleeve (602). At the same time, the liquid supply assembly (7) supplies cutting fluid to the inside of the spray pipe (801). The cutting fluid flushes the hole wall through the outlet hole (812) on the spray pipe (801). Step S2: During the grinding of the valve seat inner hole, if metal chips enter the grinding surface between the grinding sleeve (602) and the hole wall, the cylinder (505) extends, the push rod (506) drives the push rod (608) to move, and the push rod (608) drives the push block one (901) and push block two (902) to move synchronously through the collar (609), thereby releasing the fixing component (9) from fixing the grinding sleeve (602); Step S3: As the push-pull rod (506) moves, the protrusion (606) on the push-pull rod (506) lifts one of the half-shaft sleeves (605). The half-shaft sleeve (605) drives the inner ring plate (603) to move through the support plate (604), causing the grinding sleeve (602) to separate from the grinding surface, causing the grinding sleeve (602) to separate from the hole wall, so that the cutting fluid can directly wash away the metal chips on the grinding surface. Step S4: As the grinding assembly (6) rotates, the metal debris attached to the grinding sleeve (602) is thrown off by inertial force, thereby cleaning the metal debris attached to the grinding sleeve (602); Step S5: As the push-pull rod (506) moves, the push-pull rod (506) drives the front plug plate (802) to move synchronously. Through the movement of the front plug plate (802), the front plug plate (802) blocks part of the liquid outlet hole (812), causing the cutting fluid water pressure inside the spray pipe (801) to increase and accelerate the flushing force.

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