A method for machining a handwheel of a stop valve

Abstract

The application belongs to the technical field of hand wheel machining, and provides a stop valve hand wheel machining method, which comprises the following steps: step S1: preparing materials for producing valve hand wheel castings and production mechanical equipment and related grinding tools; step S2: performing furnace burden proportioning, setting a smelting temperature and time for smelting; step S3: pouring the smelted casting material into the grinding tool cavity for pouring and molding, and then cooling; step S4: using steel balls to perform shot blasting treatment on the hand wheel to strengthen the surface quality of the hand wheel and remove burrs; and step S5: using painting equipment to paint and dry the hand wheel to obtain a hand wheel finished product. Compared with the prior art, the beneficial effects of the application are as follows: the first closing plate and the second closing plate can be quickly adapted and replaced according to the size of the through hole on the hand wheel, the through hole can be completely closed from both ends, it is ensured that paint does not enter the inside of the through hole during the painting process, and the painting quality of the hand wheel is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hand wheel machining, and particularly relates to a stop valve hand wheel machining method. BACKGROUND

[0002] The valve hand wheel needs to be painted on the surface after production to prevent the hand wheel from being oxidized and rusted for a long time.

[0003] In the prior art, the painting processing mode of the hand wheel mainly includes two kinds. One is to uniformly paint the hand wheel with paint brush avoiding the square hole of the hand wheel. This processing mode is time-consuming and laborious, and the painting quality is not high, which is not conducive to production. The other way is to directly place the hand wheel in the paint box and use the immersion coating method to paint. However, in this way, a large amount of oil will remain in the square hole of the hand wheel, making it difficult for the valve rod to pass through the perforation and be fixed with the hand wheel. Therefore, the square hole of the hand wheel needs to be removed during subsequent processing, increasing the workload. In view of the above technical problems, the Chinese patent with the patent announcement number CN110394605B uses two groups of air rods to respectively push the first group of triangular clamping blocks and the second group of clamping blocks to pass through the inner hole of the hand wheel, avoiding the paint from entering the square hole. However, for different models of hand wheels, the diameters of the square holes are different, and it is not convenient to replace the corresponding clamping blocks. Moreover, the existing hand wheels are mostly fixed and connected in the way of circular hole plus key groove, increasing the limitation of the use of the equipment. SUMMARY

[0004] The purpose of the present application is to provide a stop valve hand wheel machining method, which aims to solve the technical problem of inconvenience in replacing the corresponding clamping equipment according to the model of the hand wheel in the prior art.

[0005] The present application is implemented as follows. A stop valve hand wheel machining method comprises the following steps:

[0006] Step S1: preparing materials for producing valve hand wheel castings, production mechanical equipment and related grinding tools;

[0007] Step S2: performing furnace charge proportioning, setting the melting temperature and time for melting;

[0008] Step S3: pouring the smelted casting material into the grinding tool cavity for casting molding, and then cooling;

[0009] Step S4: using steel balls to perform shot blasting treatment on the hand wheel to strengthen the surface quality of the hand wheel and remove burrs;

[0010] Step S5: using painting equipment to paint and dry the hand wheel to obtain a hand wheel finished product;

[0011] The painting equipment comprises a base, conveying belts rotatably installed at both ends of the base, a limiting plate and a positioning plate for positioning a hand wheel arranged on the base, a moving frame slidingly installed on the base and provided with a servo module for driving the moving frame to reciprocate, an electric telescopic rod horizontally fixedly installed on the moving frame and pointing to the base, a communication chamber fixedly installed at an output end of the electric telescopic rod and provided with a camera fixedly installed on a surface close to the base, a branch pipe arranged on the communication chamber, a first inner plate threadedly connected to one end of the branch pipe away from the communication chamber, a first closing plate arranged on the first inner plate, a second inner plate slidingly installed on the branch pipe and provided with a second closing plate, the first inner plate connected to the second inner plate, a fixing plate arranged at one end of the branch pipe away from the communication chamber and used for fixing the hand wheel, and a motor fixedly installed on the communication chamber and used for driving the branch pipe to rotate.

[0012] Further technical solutions: the limiting plate is provided with two groups, a sliding plate fixedly installed on the limiting plate and slidingly installed on the side wall of the base, a fixing screw threadedly installed on the base and used for fixing the sliding plate, and the positioning plate fixedly installed in the base and vertically distributed with the limiting plate, the positioning plate and the limiting plate being distributed in the conveying area of the conveying belt.

[0013] Further technical solutions: the first inner plate is fixedly installed on a surface close to the communication chamber and provided with an installation cylinder, a support rod threadedly connected to the installation cylinder, and a second magnet fixedly installed at an end of the support rod, and the second inner plate is provided with a connecting groove matched with the second magnet.

[0014] Further technical solutions: the communication chamber is rotatably installed with a communication pipe, the communication pipe penetrates through the side wall of the communication chamber and is coaxially threadedly connected with the branch pipe, the communication pipe is in communication with the communication chamber and the branch pipe, and the motor drives the communication pipe to rotate.

[0015] Further technical solutions: one end of the branch pipe away from the communication chamber is fixedly installed with a plurality of power cylinders, a piston rod slidingly installed in the power cylinder, and the fixing plate fixedly installed at one end of the piston rod extending out of the power cylinder, the communication chamber is fixedly installed with an air pump for conveying air into the communication chamber, an exhaust pipe fixedly installed on the side of the communication chamber and provided with an electromagnetic valve.

[0016] Further technical solutions: a plurality of grooves are formed in a side surface of the first inner plate close to the communication chamber, a plurality of installation columns are fixedly installed on the first closing plate and located in the corresponding grooves and slidingly connected with the first inner plate, an electromagnet is fixedly installed on the bottom surface in the groove and matched with a first magnet fixedly installed at an end of the installation column, and the connecting structure of the second inner plate and the second closing plate is the same as that of the first inner plate and the first closing plate.

[0017] Further technical solutions: The paint box is fixedly provided with two groups of supports, two groups of scrapers are slidably arranged on the two groups of supports, adjusting screws are threadedly arranged on the two groups of supports, the adjusting screws are rotationally connected with the corresponding scrapers, and the two groups of scrapers are different in length.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows:

[0019] 1. The branch pipe is removed from the communication pipe, then the first inner plate is removed from the branch pipe, and then the second inner plate is removed from the branch pipe, the first closing plate and the second closing plate corresponding to the size of the hand wheel are replaced, the new first closing plate and the second closing plate are installed on the branch pipe, and then the branch pipe is connected with the communication pipe to realize the replacement of the first closing plate and the second closing plate, so that the first closing plate and the second closing plate can be quickly and adaptively replaced according to the size of the through hole of the hand wheel, the flexibility and practicability of the equipment are improved, the through hole can be completely closed from both ends by the first closing plate and the second closing plate, the inside of the through hole is prevented from entering paint during painting, the subsequent installation and use of the hand wheel are not affected, and the painting quality of the hand wheel is improved.

[0020] 2. After the hand wheel is painted and the excess paint is initially shaken off, the first closing plate and the second closing plate are moved away from each other, at this time, the surfaces of the first closing plate and the second closing plate protrude from the ends of the through hole, and the movement of the first closing plate and the second closing plate can separate the paint on the first closing plate and the second closing plate from the paint on the end face of the position of the through hole under the condition that the paint is not dried, so that the paint on the side of the through hole can cover the end face of the position of the through hole neatly and completely, the paint on the hand wheel is prevented from forming an integral whole with the paint on the first closing plate and the second closing plate after drying, the paint on the hand wheel is prevented from being damaged when the first closing plate and the second closing plate are separated, and the painting quality of the hand wheel is further improved.

[0021] 3. After the first closing plate and the second closing plate are moved away from each other, the moving frame stops moving when the end of the upper scraper contacts the surface of the branch pipe during transverse movement of the moving frame, and the branch pipe remains rotating, so that the scraper can rub and scrape the surface of the first closing plate, the second closing plate and the branch pipe, the scraped paint is shaken out and falls into the paint tank under the action of centrifugal force, the moving frame continues to move for subsequent processes after a set time, the excess paint on the first closing plate, the second closing plate and the branch pipe is removed by the scraper, unnecessary paint is prevented from entering the subsequent drying process, unnecessary consumption of paint is reduced, and the first closing plate and the second closing plate do not need to be cleaned of paint, thereby improving the practicability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0023] Figure 2 It is a structure schematic view of the clamp handle in the application.

[0024] Figure 3 It is a sectional structure schematic view of the branch pipe in the application.

[0025] Figure 4 It is a structure schematic view of the installation of the first inner plate and the second inner plate in the application.

[0026] Figure 5 It is a structure schematic view of the first inner plate in the application.

[0027] Figure 6 It is a structure schematic view of the second inner plate in the application.

[0028] Figure 7 It is a structure schematic view of the paint box in the application. Figure 3 It is an enlarged schematic view of the A1 area in the application.

[0029] Figure 8 It is an enlarged schematic view of the A2 area in the application. Figure 7 It is an enlarged schematic view of the A2 area in the application.

[0030] Figure 9 It is a structure schematic view of the paint box in the application.

[0031] In the drawings: 1, base; 2, conveying belt; 3, sliding plate; 4, limiting plate; 5, positioning plate; 6, moving frame; 7, servo module; 8, electric telescopic rod; 9, communication chamber; 10, communication pipe; 11, camera; 12, motor; 13, air pump; 14, exhaust pipe; 15, branch pipe; 16, first inner plate; 17, first closing plate; 18, groove; 19, mounting column; 20, electromagnet; 21, first magnet; 22, mounting cylinder; 23, supporting rod; 24, second magnet; 25, second inner plate; 26, second closing plate; 27, connecting groove; 28, paint box; 29, drying box; 30, support; 31, adjusting screw; 32, scraper; 33, power cylinder; 34, piston rod; 35, fixed plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0033] The specific implementation of the application is described in detail below in combination with specific examples.

[0034] As shown in the drawings, the application provides a stop valve handle machining method, which comprises the following steps: Figures 1-9

[0035] ​Step S1: preparing materials for producing valve hand wheel castings and production machinery and related grinding tools;

[0036] Step S2: performing furnace charge proportioning, setting smelting temperature and time for smelting;

[0037] Step S3: pouring the smelted casting material into the grinding tool cavity for pouring and molding, and then cooling;

[0038] Step S4: using steel balls to perform shot blasting treatment on the hand wheel to strengthen the surface quality of the hand wheel and remove burrs;

[0039] Step S5: using painting equipment to paint and dry the hand wheel to obtain a hand wheel finished product;

[0040] The painting equipment includes a base 1, conveying belts 2 are rotatably installed at both ends of the base 1, limiting plates 4 for positioning hand wheels are arranged on the base 1, the limiting plates 4 are provided in two groups, sliding plates 3 are fixedly installed on the limiting plates 4, the sliding plates 3 are slidingly installed on side walls of the base 1, fixing screws for fixing the sliding plates 3 are screwedly installed on the base 1, a limiting plate 5 is fixedly installed in the base 1 and is perpendicular to the limiting plates 4, the limiting plate 5 and the limiting plates 4 are located in a conveying area of the conveying belts 2, a moving frame 6 is slidingly installed on the base 1 and a servo module 7 for driving the moving frame 6 to reciprocally move is arranged on the base 1, electric telescopic rods 8 pointing to the base 1 are fixedly installed on a horizontal section of the moving frame 6, a communication chamber 9 is fixedly installed at an output end of the electric telescopic rods 8, a camera 11 is fixedly installed on a surface of the communication chamber 9 close to the base 1, a branch pipe 15 is arranged on the communication chamber 9, a first inner plate 16 is screwedly connected to one end of the branch pipe 15 away from the communication chamber 9, a first closing plate 17 is arranged on the first inner plate 16, a second inner plate 25 is slidingly installed on the branch pipe 15, a second closing plate 26 is arranged on the second inner plate 25, the first inner plate 16 is connected with the second inner plate 25, a mounting cylinder 22 is fixedly installed on a surface of the first inner plate 16 close to the communication chamber 9, a support rod 23 is screwedly connected in the mounting cylinder 22, a second magnet 24 is fixedly installed at an end of the support rod 23, a connecting groove 27 matched with the second magnet 24 is formed in the second inner plate 25, a fixing plate 35 for fixing a hand wheel is arranged at one end of the branch pipe 15 away from the communication chamber 9, a plurality of power cylinders 33 are fixedly installed at one end of the branch pipe 15 away from the communication chamber 9, a piston rod 34 is slidingly installed in the power cylinder 33, the fixing plate 35 is fixedly installed at one end of the piston rod 34 extending out of the power cylinder 33, an air pump 13 for conveying air into the communication chamber 9 is fixedly installed on the communication chamber 9, an exhaust pipe 14 is fixedly installed on a side surface of the communication chamber 9, an electromagnetic valve is arranged on the exhaust pipe 14, a motor 12 for driving the branch pipe 15 to rotate is fixedly installed on the communication chamber 9, a communication pipe 10 is rotatably installed on the communication chamber 9, the communication pipe 10 penetrates through a side wall of the communication chamber 9 and is coaxially screwedly connected with the branch pipe 15, the communication pipe 10 communicates with the communication chamber 9 and the branch pipe 15, the motor 12 drives the communication pipe 10 to rotate, a paint tank 28 and a drying tank 29 are fixedly installed on the base 1.

[0041] In actual application, according to the size of the hand wheel, the positions of the two sets of limiting plates 4 are adjusted and fixed, the width between the two sets of limiting plates 4 is the same as the size of the outer diameter of the hand wheel, the first closing plate 17 and the second closing plate 26 of the corresponding size are selected according to the size of the through hole of the hand wheel, the branch pipe 15 is removed from the communication pipe 10, the first inner plate 16 is fixedly connected with the end of the branch pipe 15 in a threaded manner, the height of the second magnet 24 is adjusted by rotating the supporting rod 23 according to the height of the through hole of the hand wheel, then the second inner plate 25 and the second closing plate 26 are sleeved on the branch pipe 15 away from the first inner plate 16 until the second magnet 24 enters the connecting groove 27, at this time the second magnet 24 adsorbs and fixes the second inner plate 25, the protruding positions of the first closing plate 17 and the second closing plate 26 correspond, the distance between the mutually away surfaces of the first closing plate 17 and the second closing plate 26 is the same as the height of the through hole on the hand wheel, and the paint of the set height is added into the paint box 28;

[0042] After the adjustment is completed, the hand wheel to be painted is placed on the conveying belt 2 and located between the two sets of limiting plates 4, the hand wheel is moved by the conveying belt 2 until the hand wheel contacts the positioning plate 5, at this time the conveying belt 2 stops moving and the position of the hand wheel is positioned by the limiting plate 4 and the positioning plate 5;

[0043] At this time the hand wheel is located directly below the communication chamber 9, the position where the key groove is located is detected by the camera 11, then the branch pipe 15 is driven to rotate by the motor 12 to a set angle so that the protruding positions of the first closing plate 17 and the second closing plate 26 correspond to the position of the key groove, after alignment the communication chamber 9 is moved downward by the electric telescopic rod 8 so that the first closing plate 17 and the second closing plate 26 enter the through hole, when the lower surface of the first closing plate 17 is flush with the lower end of the through hole, the movement is stopped, at this time the upper surface of the second closing plate 26 is flush with the upper end of the through hole, the two ends of the through hole are closed by the first closing plate 17 and the second closing plate 26, then the air pump 13 transports air into the communication chamber 9, the air enters the power cylinder 33 along the communication pipe 10 and the branch pipe 15, under the pushing of the air the piston rod 34 moves, the piston rod 34 drives the fixed plate 35 to contact the inner wall of the through hole of the hand wheel, under the action of the air pressure the fixed plate 35 is in abutment with the inner wall of the through hole of the hand wheel to realize the fixed connection of the hand wheel and the branch pipe 15;

[0044] After the fixing is completed, the electric telescopic rod 8 drives the hand wheel to move upwards to pass the positioning plate 5, then the servo module 7 drives the moving frame 6 to move to the upper side of the paint box 28, the electric telescopic rod 8 drives the hand wheel to move downwards again to make the hand wheel completely immerse in the paint, at this time, the paint liquid surface is higher than the upper surface of the second closing plate 26 by a set height, after the hand wheel enters the paint, the moving frame 6 keeps moving to make the hand wheel fully contact with the paint, after the moving frame 6 moves a set distance, the hand wheel moves upwards to separate from the paint, at the same time, the motor 12 drives the hand wheel to rotate to shake off the excess paint, then the hand wheel moves upwards to the height of the drying box 29, when the moving frame 6 continues to move, the hand wheel enters the drying box 29 to dry, after the drying is completed, the hand wheel moves to another set of conveying belts 2, at this time, the electromagnetic valve on the exhaust pipe 14 is opened to release the gas in the communication chamber 9, so as to release the fixation of the hand wheel by the fixing plate 35, then the electric telescopic rod 8 drives the communication chamber 9 to move upwards to make the first closing plate 17 separate from the hand wheel, then the moving frame 6 returns to the initial position to continue to clamp the next hand wheel to paint;

[0045] When different models of hand wheels are replaced for painting, the branch pipe 15 is removed from the communication pipe 10, then the first inner plate 16 is removed from the branch pipe 15, then the second inner plate 25 is removed from the branch pipe 15, the first closing plate 17 and the second closing plate 26 corresponding to the size of the hand wheel are replaced, the above steps are repeated to install the new first closing plate 17 and the second closing plate 26 on the branch pipe 15, then the branch pipe 15 is connected with the communication pipe 10, so that the first closing plate 17 and the second closing plate 26 can be replaced, the first closing plate 17 and the second closing plate 26 can be quickly adapted and replaced according to the size of the through hole of the hand wheel, the flexibility and practicability of the equipment are improved, and the through hole can be completely closed from both ends by the first closing plate 17 and the second closing plate 26, so that the paint does not enter the through hole during the painting process, the subsequent installation and use of the hand wheel are not affected, and the painting quality of the hand wheel is improved.

[0046] As shown in Figure 1 , Figure 3 , Figures 7-9 , it is a machining method of a stop valve hand wheel provided by the application, a plurality of grooves 18 are formed in the side surface of the first inner plate 16 close to the communication chamber 9, a plurality of installation columns 19 are fixedly installed on the first closing plate 17, the installation columns 19 are located in the corresponding grooves 18, and the installation columns 19 are slidingly connected with the first inner plate 16, an electromagnet 20 is fixedly installed on the bottom surface in the groove 18, and the electromagnet 20 is used in cooperation with a first magnet 21 fixedly installed at the end of the installation column 19, and the connection structure of the second inner plate 25 and the second closing plate 26 is the same as that of the first inner plate 16 and the first closing plate 17.

[0047] Specifically, two groups of supports 30 are fixedly installed in the paint box 28, two groups of scrapers 32 are slidably installed on the two groups of supports 30, and adjusting screws 31 are threadedly installed on the two groups of supports 30, the adjusting screws 31 are respectively connected with the corresponding scrapers 32 in rotation, and the two groups of scrapers 32 are different in length.

[0048] In actual application, after the first closing plate 17 and the second closing plate 26 are installed, the electromagnet 20 is powered, the electromagnet 20 generates repulsion force on the first magnet 21, so that the first closing plate 17 is tightly attached to the first inner plate 16, and the second closing plate 26 is tightly attached to the second inner plate 25, when the electromagnet 20 is reversely powered, the first closing plate 17 is away from the first inner plate 16, and the second closing plate 26 is away from the second inner plate 25, the height of the two groups of scrapers 32 is adjusted according to the distance between the mutually away surfaces of the first closing plate 17 and the second closing plate 26 in the away state, the height of the two groups of scrapers 32 is adjusted by the adjusting screws 31, so that the distance between the mutually close surfaces of the two groups of scrapers 32 is the same as the distance between the mutually away surfaces of the first closing plate 17 and the second closing plate 26 in the away state;

[0049] After the painting is completed and the excess paint is preliminarily shaken off, the electromagnet 20 is reversely powered at this time, the electromagnet 20 adsorbs the first magnet 21, so that the first closing plate 17 and the second closing plate 26 are away from each other, at this time, the end of the surface of the first closing plate 17 and the second closing plate 26 protruding through the hole, the first closing plate 17 and the second closing plate 26 can move to separate the paint on the first closing plate 17 and the second closing plate 26 from the paint on the end face of the position where the hole is located under the condition that the paint is not dried, to ensure that the paint on the side of the hole can cover the end face of the position where the hole is located in an orderly and complete manner, to avoid that the paint on the hand wheel and the paint on the first closing plate 17 and the second closing plate 26 form an integral whole after drying, causing the paint on the hand wheel to be damaged when the first closing plate 17 and the second closing plate 26 are separated, and further improving the quality of painting on the hand wheel;

[0050] When the first closing plate 17 and the second closing plate 26 move away from each other, the first closing plate 17 and the second closing plate 26 are in contact with the two groups of scrapers 32 respectively, the lower scrapers 32 are in contact with the lower surface of the first closing plate 17, and the upper scrapers 32 are in contact with the upper surface of the second closing plate 26, when the end of the upper scrapers 32 is in contact with the surface of the branch pipe 15, the moving frame 6 stops moving, the branch pipe 15 keeps rotating, so that the scrapers 32 can be in friction with the surface of the first closing plate 17, the second closing plate 26 and the branch pipe 15, and the scraped paint is thrown out and falls into the paint tank 28 under the action of centrifugal force, after a set time, the moving frame 6 continues to move to carry out the subsequent process, the excess paint on the first closing plate 17, the second closing plate 26 and the branch pipe 15 is removed by the scrapers 32, unnecessary paint is avoided from entering the subsequent drying process, unnecessary consumption of paint is reduced, and the first closing plate 17 and the second closing plate 26 do not need to be cleaned of paint, improving the practicability of the equipment.

[0051] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

[0052] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A method of machining a handwheel of a globe valve, characterized by, It comprises the following steps: Step S1: preparing the material for producing valve hand wheel castings and the production machinery and related grinding tools; Step S2: performing furnace charge proportioning, setting the smelting temperature and time for smelting; Step S3: pouring the smelted casting material into the grinding tool cavity for pouring and molding, and then cooling; Step S4: using steel balls to perform shot blasting treatment on the hand wheel to strengthen the surface quality and deburring of the hand wheel; Step S5: using a painting device to paint and dry the hand wheel to obtain the hand wheel finished product; The painting device comprises a base (1), conveying belts (2) are rotatably installed at both ends of the base (1), limiting plates (4) and (5) for positioning the hand wheel are arranged on the base (1), a moving frame (6) is slidably installed on the base (1) and a servo module (7) for driving the moving frame (6) to reciprocate is arranged on the base (1), an electric telescopic rod (8) pointing to the base (1) is fixedly installed on a horizontal section of the moving frame (6), a connecting chamber (9) is fixedly installed at an output end of the electric telescopic rod (8), a camera (11) is fixedly installed on a surface of the connecting chamber (9) close to the base (1), a branch pipe (15) is arranged on the connecting chamber (9), a first inner plate (16) is threadedly connected to one end of the branch pipe (15) away from the connecting chamber (9), a first closing plate (17) is arranged on the first inner plate (16), a second inner plate (25) is slidably installed on the branch pipe (15), a second closing plate (26) is arranged on the second inner plate (25), the first inner plate (16) is connected with the second inner plate (25), a fixing plate (35) for fixing the hand wheel is arranged at one end of the branch pipe (15) away from the connecting chamber (9), a motor (12) for driving the branch pipe (15) to rotate is fixedly installed on the connecting chamber (9), and a paint tank (28) and a drying tank (29) are fixedly installed on the base (1); A mounting cylinder (22) is fixedly installed on a surface of the first inner plate (16) close to the connecting chamber (9), a support rod (23) is threadedly connected into the mounting cylinder (22), a second magnet (24) is fixedly installed at an end of the support rod (23), and a connecting groove (27) matched with the second magnet (24) is formed in the second inner plate (25); A connecting pipe (10) is rotatably installed on the connecting chamber (9), penetrates through a side wall of the connecting chamber (9), is coaxially and threadedly connected with the branch pipe (15), and is in communication with the connecting chamber (9) and the branch pipe (15), and the motor (12) drives the connecting pipe (10) to rotate; A plurality of power cylinders (33) are fixedly installed at one end of the branch pipe (15) away from the connecting chamber (9), a piston rod (34) is slidably installed in each power cylinder (33), and the fixing plate (35) is fixedly installed at one end of the piston rod (34) extending out of the power cylinder (33), an air pump (13) for conveying air into the connecting chamber (9) is fixedly installed on the connecting chamber (9), an exhaust pipe (14) is fixedly installed on a side surface of the connecting chamber (9), and an electromagnetic valve is arranged on the exhaust pipe (14). The first inner plate (16) is provided with a plurality of grooves (18) near the side of the communication chamber (9), a plurality of mounting columns (19) are fixedly installed on the first closing plate (17), the mounting columns (19) are located in the corresponding grooves (18) and are in sliding connection with the first inner plate (16), an electromagnet (20) is fixedly installed on the bottom surface of the groove (18), and the electromagnet (20) is used in cooperation with a first magnet (21) fixedly installed on the end of the mounting column (19); the connecting structure of the second inner plate (25) and the second closing plate (26) is the same as that of the first inner plate (16) and the first closing plate (17).

2. A method of machining a handwheel for a globe valve as defined in claim 1, wherein The limiting plate (4) is provided with two groups, the limiting plate (4) is fixedly installed with a sliding plate (3), the sliding plate (3) is slidingly installed on the side wall of the base (1), the base (1) is threadedly installed with a fixing screw for fixing the sliding plate (3), the positioning plate (5) is fixedly installed in the base (1) and is vertically distributed with the limiting plate (4), and the positioning plate (5) and the limiting plate (4) are both located in the conveying area of the conveying belt (2).

3. The method of claim 1, wherein the handwheel is a stop valve handwheel. The paint tank (28) is fixedly installed with two groups of supports (30), two groups of scrapers (32) are slidingly installed on the two groups of supports (30), adjusting screws (31) are threadedly installed on the two groups of supports (30), the adjusting screws (31) are respectively in rotary connection with the corresponding scrapers (32), and the two groups of scrapers (32) are different in length.

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