A machining process for an industrial valve

Abstract

The application discloses a machining process of an industrial valve and relates to the technical field of industrial valve machining. The machining of the industrial valve is completed by cooperation of a door-shaped table, a clamping part, a switching part, a synchronous polishing mechanism and a rapid plugging mechanism. The clamping part is installed on the left part of the upper end face of the door-shaped table. The roughness of the polishing blocks in the row close to the E-shaped frame gradually decreases from the center of the installation cylinder to the edge. The application realizes the gradual switching of the polishing blocks from coarse to fine by the progressive polishing unit, ensures that the sealing surface of the valve body gradually obtains a smooth and uniform surface, automatically switches the polishing blocks to eliminate the complicated operation of frequent shutdown, and enables the elastic polishing strip to automatically deform according to the shape of the inner cavity of the valve body, to ensure close contact with the inner cavity wall, realize uniform polishing, eliminate dead angles, and simultaneously block multiple ports of the valve body by the rapid plugging mechanism, so that the plugging operation is simplified, the plugging force of each port is consistent, and the accuracy of the sealing test is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial valve processing technology, specifically to a processing technology for industrial valves. Background Technology

[0002] Industrial valves are essential accessories for controlling the flow of media in industrial pipelines. They are widely used in industries such as oil and gas, chemical, power generation, water treatment, and pharmaceuticals. They can handle various fluids, including liquids, gases, slurries, and steam. In industrial applications, they have functions such as starting and stopping fluid flow, regulating flow and pressure, preventing backflow, distributing fluids, and releasing pressure. The application of industrial valves in various industries directly affects the efficiency of production processes, the safety of equipment, and environmental protection. They are an indispensable and important part of industrial production. Currently, the main processing steps for industrial valves include casting, heat treatment, surface galvanizing, grinding of the internal cavity and sealing surfaces, performance testing, and assembly.

[0003] Among these, grinding of the inner cavity and sealing surface and performance testing are crucial because they directly affect the valve's sealing performance. Since the valve body is usually cast, its inner cavity wall and sealing surface have a large roughness. The valve's sealing surface needs to have extremely high flatness and smoothness to ensure that it can completely block the flow of the medium when closed and prevent leakage. The smooth inner wall of the valve body can reduce fluid resistance, prevent the accumulation of particles in the medium, and help improve the valve's durability. Therefore, it is necessary to grind the inner cavity and sealing surface of the valve body.

[0004] Because the valve body sealing surface has high requirements for smoothness, it needs to undergo multiple grinding stages, from a relatively rough initial grinding to a final fine polishing, to ensure that the surface achieves the required smoothness and sealing performance. Existing valve body sealing surface grinding equipment usually uses a single grinding block of a single roughness at a time. After each grinding block of a certain roughness is used up, the machine needs to be stopped to replace it with the next level of roughness grinding block. The operation of frequently stopping to replace grinding blocks is cumbersome and time-consuming. In addition, due to the complex internal geometry of the valve body, the shape of existing grinding blocks is usually fixed and cannot be tightly fitted to the inner cavity wall, resulting in some areas not being effectively ground, and problems such as dead corners and uneven grinding.

[0005] Furthermore, when performing a sealing test on the valve body, it is necessary to block multiple ports and introduce liquid to test its sealing performance. However, the existing method of sealing multiple ports of the valve body in sequence requires manual or mechanical adjustment for each port's sealing and unsealing operations, which increases the testing time and operational complexity, reduces testing efficiency, and the method of sealing multiple ports in sequence may result in inconsistent sealing force, thus affecting the accuracy of the test.

[0006] In addition, between the completion of the valve body grinding and its testing, it needs to be moved to different processing positions, which requires additional time for clamping and unloading operations, further increasing the complexity of the operation and slowing down the processing speed of the valve body. Summary of the Invention

[0007] This invention provides a processing technology for industrial valves, solving the problems of existing valve body processing and grinding methods that require the use of a single roughness grinding block each time, resulting in frequent machine stops to change grinding blocks of different roughnesses, which is cumbersome and time-consuming. Secondly, due to the complex internal geometry of the valve body, the grinding block shape is fixed and it is difficult to fit tightly against the inner cavity wall, resulting in some areas that cannot be effectively ground, leading to dead corners and uneven grinding. In addition, during valve body sealing tests, multiple ports need to be manually or mechanically sealed one by one, increasing the complexity and time of operation. Furthermore, inconsistent sealing force affects the accuracy of the test. After grinding, the valve body needs to be moved to different processing positions for clamping and removal, further increasing the complexity of operation and slowing down the processing speed.

[0008] This invention provides a processing technology for industrial valves, and the specific processing steps for industrial valves are as follows: S1. Casting process: The metal is melted and poured into a mold. After cooling, the initial shape of each component of the valve is formed, and the required blank is obtained.

[0009] S2. Heat treatment: Eliminates internal stress generated during casting or forging, and improves the mechanical properties of the material.

[0010] S3. Surface treatment: Polish the outer surface of the valve to improve its appearance quality and reduce frictional resistance during media flow. Depending on the valve's operating environment, perform zinc plating, chrome plating, or nickel plating to enhance its corrosion resistance.

[0011] S4. Refined machining of sealing and cavity surfaces: The valve body's inner cavity and sealing surfaces are simultaneously refined through a synchronous grinding mechanism to ensure the valve's sealing performance.

[0012] S5. Performance Test: By simultaneously blocking the three ports of the valve body through the quick-blocking mechanism, high-temperature liquid and low-temperature liquid are introduced into the valve body under the specified pressure to simultaneously conduct water pressure test and large temperature difference change test to check its sealing performance and strength.

[0013] S6. Component assembly: Assemble the valve body, valve cover, valve stem, and sealing components. Test the assembled valve to ensure that it opens and closes flexibly.

[0014] The processing steps of the industrial valves in the above S1-S6 steps need to be completed by the cooperation of the gantry, clamping part, switching part, synchronous grinding mechanism and quick-closing mechanism.

[0015] A clamping part is installed on the left side of the upper end face of the portal frame. A strip-shaped through groove is opened in the transverse section of the portal frame, and a switching part is installed in the strip-shaped through groove. The switching part includes a mounting rod frame. The left side of the mounting rod frame is provided with a synchronous grinding mechanism for simultaneously grinding and finishing the valve body sealing surface and the inner cavity wall. The right side of the mounting rod frame is provided with a quick-blocking mechanism for simultaneously sealing the three ports of the valve body to facilitate rapid sealing testing. The switching part is used to sequentially control the synchronous grinding mechanism and the quick-blocking mechanism to contact the valve body respectively so as to quickly switch to apply different processing steps to the valve body. The synchronous grinding mechanism includes a horizontal plate fixedly connected to the lower end face of the left side of the mounting rod frame, two vertical slide plates symmetrically slidably connected to the horizontal plate, a bidirectional threaded rod rotatably connected to the horizontal plate and threaded to the two vertical slide plates, and mounting cylinders respectively fixedly connected to opposite sides of the vertical slide plates. The system comprises: a drive ring rotatably connected to the outside of the mounting cylinder; a progressive grinding unit jointly mounted on the mounting cylinder and the drive ring for gradually grinding the valve body sealing surface from rough to fine; and a self-deforming grinding unit jointly mounted between the two mounting cylinders for adaptive deformation according to the shape of the valve body cavity to fit into the valve body cavity. The progressive grinding unit includes: several E-shaped frames slidably connected to the outside of the drive ring via connecting telescopic rods; several rotating columns rotatably connected at equal intervals to the E-shaped frames; grinding blocks symmetrically fixed to the outside of the rotating columns via fixing blocks; and a drive assembly positioned between the E-shaped frames and the mounting cylinders for driving the grinding blocks to move and grind the valve body sealing surface. The roughness of the row of grinding blocks away from the E-shaped frames increases sequentially from the inside to the edge along the center of the mounting cylinder, while the roughness of the row of grinding blocks closer to the E-shaped frames decreases sequentially from the inside to the edge along the center of the mounting cylinder.

[0016] In one possible implementation, the self-deformable grinding unit includes a No. 1 screw fixedly connected to the cavity wall of the mounting cylinder near the vertical slide plate. The No. 1 screw is externally threaded with a sleeve. The end of the sleeve away from the mounting cylinder is fixedly connected to a column rod via a spring telescopic column. Both ends of the column rod are fixedly connected to elastic grinding strips. The sleeve is axially provided with a sliding groove. The drive ring is fixedly connected to an L-shaped slide bar slidably connected in the sliding groove on the side away from the vertical slide plate.

[0017] In one possible implementation, the right end face of the elastic grinding strip located on the left side is provided with an alignment hole, and the left end face of the elastic grinding strip located on the right side is fixedly connected with an alignment post that mates with the alignment hole.

[0018] In one possible implementation, the drive assembly includes a second screw fixedly connected to the side of the E-shaped frame near the mounting cylinder. The mounting cylinder is fixedly connected to an end face toothed ring on the side away from the vertical slide plate. The second screw is externally threaded with a toothed ring that meshes with the end face toothed ring. The drive ring is circumferentially and equidistantly connected to a plurality of slide rods corresponding to the E-shaped frame via a connecting strip on the side away from the vertical slide plate. A gear is fixedly connected to the end of the rotating column. A plurality of racks corresponding to and meshing with the gear are equidistantly slidably connected to the outside of the slide rods. Limiting strips are symmetrically fixedly connected to the side of the racks near the gear.

[0019] In one possible implementation, the two side end faces of the gear ring are respectively fixedly connected with limiting rings for limiting their own position.

[0020] In one possible implementation, the switching unit further includes a turntable rotatably connected to the rear wall of the strip-shaped through groove, the mounting bracket being embedded and fixedly connected in the turntable, the front end face of the turntable being fixedly connected to an arc-shaped guide frame via a fixing post, the front wall of the strip-shaped through groove being fixedly connected to a stop post slidably connected in the arc-shaped guide frame via a leaf spring, and the arc-shaped guide frame being symmetrically provided with arc-shaped grooves that cooperate with the stop posts.

[0021] In one possible implementation, the quick-blocking mechanism includes a portal frame fixedly connected to the right side of the mounting bracket. A mounting ring is slidably connected to the lower end face of the portal frame's horizontal section via a spring-loaded telescopic support. A connecting pipe that slides through the horizontal wall panel of the portal frame is fixedly connected to the inner wall of the mounting ring. Two vertical sections of the portal frame are slidably connected to sliding columns, and blocking discs are fixedly connected to the opposite ends of the two sliding columns. Sliding strips are symmetrically slidably connected to the lower end face of the portal frame's horizontal section. A connecting rod is hinged between the mounting ring and the sliding strips. Bi-directional telescopic rods are hinged to the left and right opposite sides of the portal frame via connecting rods. The upper end of the bi-directional telescopic rod is hinged to the sliding strip, and the lower end of the bi-directional telescopic rod is hinged to the sliding column.

[0022] In one possible implementation, the clamping part includes two mounting plates symmetrically fixedly connected to the upper surface of the portal frame. Each of the two mounting plates has an arc-shaped clamping plate slidably connected to its opposite side via an electric telescopic rod. The arc-shaped inner walls of the two arc-shaped clamping plates are respectively fixedly connected with flexible pads.

[0023] As can be seen from the above technical solutions, the present invention has the following advantages: In this invention, the progressive grinding unit switches grinding blocks of different roughness from the inside out and from coarse to fine step by step, which can ensure that the surface quality of the valve body sealing surface is gradually improved, thereby obtaining a smoother and more uniform surface. The automatic grinding block switching design eliminates the tedious operation of frequently changing grinding blocks, and also greatly shortens the downtime during the grinding process without frequent machine stops, thus improving processing efficiency.

[0024] In this invention, the elastic grinding strip initially moves along the cylindrical inner cavity of the valve body for grinding. Then, when it moves into the spherical cavity of the valve body, it comes together and is squeezed to deform and arch. It can automatically adapt to different deformations in the inner cavity of the valve body, ensuring close contact with the inner cavity wall of the valve body throughout the grinding process. This allows for uniform grinding of the entire inner cavity wall, thereby improving the grinding quality and smoothness, ensuring the uniformity of the inner cavity wall surface, and ensuring that all surfaces are evenly ground, thus eliminating grinding dead corners.

[0025] In this invention, the mounting ring, sliding column, blocking disc, sliding strip, connecting rod, and bidirectional telescopic rod in the quick-blocking mechanism are combined to simultaneously block multiple ports on the valve body, eliminating the need to adjust the blocking position one by one, greatly shortening the test preparation time, making the entire sealing test process more efficient, and ensuring that the blocking force applied to each port is consistent, avoiding uneven force caused by blocking one by one, thereby improving the accuracy and reliability of the test results.

[0026] In this invention, the switching unit sequentially controls the synchronous grinding mechanism and the quick-blocking mechanism to move to the position of the valve body, thereby performing different processing steps on the valve body. This allows for quick switching between different processing steps on the valve body, ensuring that the valve body remains in the same position throughout the processing. This eliminates the need for frequent handling and clamping, enabling seamless connection between different processing steps and accelerating the processing speed of the valve body. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 The manufacturing process diagram of the industrial valve provided by this invention.

[0029] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 3 This is a schematic diagram of the overall cross-sectional structure provided for the present invention.

[0031] Figure 4 Provided by the present invention Figure 3 An enlarged schematic diagram of part A of the structure.

[0032] Figure 5 This is a schematic diagram of the installation structure of the clamping part and the synchronous grinding mechanism provided by the present invention.

[0033] Figure 6 A schematic diagram of the synchronous grinding mechanism provided by the present invention.

[0034] Figure 7 This is a partial structural diagram of the synchronous grinding mechanism provided by the present invention.

[0035] Figure 8 Provided by the present invention Figure 7 An enlarged schematic diagram of part B of the structure.

[0036] Figure 9 This is a schematic diagram of the alignment post and alignment hole mating structure provided by the present invention.

[0037] Figure 10 This is a schematic diagram of the quick-blocking mechanism provided by the present invention.

[0038] Figure 11 A schematic diagram showing the specific shape of the work object provided by the present invention.

[0039] The above figures include the following reference numerals: 1. Portal platform; 2. Clamping part; 21. Mounting plate; 22. Electric telescopic rod; 23. Arc-shaped clamping plate; 3. Switching part; 31. Mounting rod frame; 32. Turntable; 33. Arc-shaped guide frame; 34. Leaf spring; 35. Stop post; 36. Arc-shaped groove; 4. Synchronous grinding mechanism; 41. Horizontal plate; 42. Vertical slide plate; 43. Bidirectional threaded rod; 44. Mounting cylinder; 45. Drive ring; 46. Progressive grinding unit; 461. Connecting telescopic rod; 462. E-shaped frame; 463. Rotating column; 464. Grinding block; 465. Drive assembly; 4651. No. 2 screw; 4652. End face tooth 4653. Ring; 4654. Gear; 4655. Slide rod; 4656. Gear; 4657. Rack; 4658. Limiting strip; 47. Self-deforming grinding unit; 471. No. 1 screw; 472. Sleeve; 473. Spring telescopic column; 474. Column rod; 475. Elastic grinding strip; 476. Sliding groove; 477. L-shaped slide bar; 5. Quick-closing mechanism; 51. Portal frame; 52. Spring telescopic support column; 53. Mounting ring; 54. Connecting pipe; 55. Slide column; 56. Blocking plate; 57. Slide bar; 58. Connecting rod; 59. Bidirectional telescopic rod; 6. Alignment hole; 7. Alignment post; 8. Limiting ring. Detailed Implementation

[0040] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 This invention provides a technical solution: a processing technology for industrial valves, the specific processing steps of which are as follows: S1. Casting process: The metal is melted and poured into a mold. After cooling, the initial shape of each component of the valve is formed, and the required blank is obtained.

[0042] S2. Heat treatment: Eliminates internal stress generated during casting or forging, and improves the mechanical properties of the material.

[0043] S3. Surface treatment: Polish the outer surface of the valve to improve its appearance quality and reduce frictional resistance during medium flow. Depending on the valve's operating environment, perform zinc plating, chrome plating, or nickel plating to enhance corrosion resistance.

[0044] S4. Refined machining of sealing and cavity surfaces: The valve body's inner cavity and sealing surfaces are simultaneously refined by the synchronous grinding mechanism 4 to ensure the valve's sealing performance.

[0045] S5. Performance test: The three ports of the valve body are blocked simultaneously by the quick-blocking mechanism 5. Then, high-temperature liquid and low-temperature liquid are introduced into the valve body under the specified pressure to conduct water pressure test and large temperature difference change test at the same time to check its sealing performance and strength.

[0046] S6. Component assembly: Assemble the valve body, valve cover, valve stem, and sealing components. Test the assembled valve to ensure that it opens and closes flexibly.

[0047] The processing steps of the industrial valve in steps S1-S6 above need to be completed by the cooperation of the gantry 1, clamping part 2, switching part 3, synchronous grinding mechanism 4 and quick-blocking mechanism 5.

[0048] A clamping part 2 is installed on the left side of the upper end face of the portal frame 1. A strip-shaped through groove is opened in the transverse section of the portal frame 1. A switching part 3 is installed in the strip-shaped through groove. The switching part 3 includes a mounting rod 31. A synchronous grinding mechanism 4 is provided on the left side of the mounting rod 31 for simultaneously grinding and finishing the valve body sealing surface and the inner cavity wall. A quick-blocking mechanism 5 is provided on the right side of the mounting rod 31 for simultaneously blocking the three ports of the valve body to facilitate rapid sealing testing. The switching part 3 is used to control the synchronous grinding mechanism 4 and the quick-blocking mechanism 5 to contact the valve body in turn so as to quickly switch to apply different processing steps to the valve body. The clamping part 2 includes two mounting plates 21 that are symmetrically fixed to the upper end face of the portal frame 1. The two mounting plates 21 are slidably connected to the opposite sides of each other by an electric telescopic rod 22 with arc-shaped clamping plates 23. Flexible pads are fixedly connected to the arc-shaped inner walls of the two arc-shaped clamping plates 23. The flexible pads protect the arc-shaped clamping plates 23 when clamping the valve body, preventing damage to the galvanized layer on the surface of the valve body.

[0049] Please see Figure 3 and Figure 4 In this embodiment, the switching unit 3 further includes a turntable 32 rotatably connected to the rear wall of the strip-shaped through groove. The mounting bracket 31 is embedded and fixedly connected to the turntable 32. The front end face of the turntable 32 is fixedly connected to an arc-shaped guide frame 33 by a fixing post. The front wall of the strip-shaped through groove is fixedly connected to a stop post 35 slidably connected to the arc-shaped guide frame 33 by a leaf spring 34. The arc-shaped guide frame 33 is symmetrically provided with arc-shaped grooves 36 that cooperate with the stop post 35.

[0050] Before processing the valve body, the opening in the middle is first placed directly downwards between two arc-shaped clamping plates 23. Then, the electric telescopic rod 22 is extended, causing the two arc-shaped clamping plates 23 to move closer to each other until they touch the outside of the valve body and clamp it. When the valve body needs to be polished on the sealing surface and cavity surface, the switching unit 3 is operated to move the synchronous polishing mechanism 4 to the outside of the valve body. The installation rod 31 is rotated manually or by an external control device. The installation rod 31 then drives the turntable 32 to rotate. The turntable 32 then drives the arc-shaped guide frame 33 to slide outside the stop post 35. When the synchronous polishing mechanism 4 is moved to the outside of the valve body, the arc-shaped guide frame 33 drives the arc-shaped groove 36 located on the left to move to the position of the stop post 35, so that the arc-shaped groove 36 on the left is engaged with the stop post 35, thereby limiting the movement of the installation rod 31.

[0051] After the synchronous grinding mechanism 4 finishes processing the valve body, the mounting rod 31 is manually or externally rotated. The mounting rod 31 then rotates the arc-shaped guide frame 33 via the turntable 32, causing the arc-shaped groove 36 to separate from the stop post 35. Then, the mounting rod 31 is rotated 180 degrees, causing the synchronous grinding mechanism 4 to move away from the valve body. The mounting rod 31 then connects the quick-blocking mechanism 5 to the valve body, allowing the valve body to be sealed using the quick-blocking mechanism 5. After rotating 180 degrees, the mounting rod 31 moves the arc-shaped groove 36 located on the right to the left position, engaging with the stop post 35. This allows for quick switching between different processing steps of the valve body. The valve body remains in the same position throughout the processing, eliminating frequent handling and clamping steps, enabling seamless connection between different processing steps and accelerating the processing speed of the valve body.

[0052] Please see Figure 5 and Figure 6 In this embodiment, the synchronous grinding mechanism 4 includes a horizontal plate 41 fixedly connected to the lower left end face of the mounting rod 31, two vertical slide plates 42 symmetrically slidably connected to the horizontal plate 41, a bidirectional threaded rod 43 rotatably connected to the horizontal plate 41 and threadedly connected to the two vertical slide plates 42, mounting cylinders 44 fixedly connected to the opposite sides of the vertical slide plates 42, a drive ring 45 rotatably connected to the outside of the mounting cylinder 44, a progressive grinding unit 46 jointly disposed on the mounting cylinder 44 and the drive ring 45 for gradually grinding the valve body sealing surface from rough to fine, and a self-deforming grinding unit 47 jointly disposed between the two mounting cylinders 44 for adaptively deforming according to the shape of the valve body cavity so as to fit into the valve body cavity.

[0053] Please see Figure 6 , Figure 7 and Figure 8 The progressive grinding unit 46 includes several E-shaped frames 462 slidably connected to the outside of the drive ring 45 via connecting telescopic rods 461, several rotating columns 463 equidistantly rotatably connected to the E-shaped frames 462, grinding blocks 464 symmetrically fixed to the outside of the rotating columns 463 via fixing blocks, and a drive assembly 465 disposed between the E-shaped frames 462 and the mounting cylinder 44 for driving the grinding blocks 464 to move in order to grind the valve body sealing surface. The roughness of the row of grinding blocks 464 away from the E-shaped frames 462 increases sequentially from the inside to the edge along the center of the mounting cylinder 44, while the roughness of the row of grinding blocks 464 close to the E-shaped frames 462 decreases sequentially from the inside to the edge along the center of the mounting cylinder 44.

[0054] Please see Figure 7 and Figure 8The drive assembly 465 includes a second screw 4651 fixedly connected to the side of the E-shaped bracket 462 near the mounting cylinder 44. A toothed end face ring 4652 is fixedly connected to the side of the mounting cylinder 44 away from the vertical slide plate 42. A toothed ring 4653, meshing with the toothed end face ring 4652, is externally threaded onto the second screw 4651. Several sliding rods 4654, corresponding to the E-shaped bracket 462, are circumferentially and equidistantly fixed to the side of the drive ring 45 away from the vertical slide plate 42 via connecting strips. A gear is fixedly connected to the end of the rotating column 463. 4655, a number of racks 4656 corresponding to and meshing with gear 4655 are equidistantly slidably connected to the outside of the slide rod 4654. Limiting strips 4657 are symmetrically fixedly connected to the side of the racks 4656 near the gear 4655. Limiting rings 8 for limiting their own position are fixedly connected to the two side end faces of the gear ring 4653. The limiting rings 8 abut against the inner and outer walls of the end face gear ring 4652 to limit the gear ring 4653, ensuring that the gear ring 4653 always meshes with the end face gear ring 4652.

[0055] After the synchronous grinding mechanism 4 is moved to the outside of the valve body, the bidirectional threaded rod 43 is manually rotated to move the two vertical slide plates 42 closer to each other. The vertical slide plates 42 then move the mounting cylinders 44 closer to each other. The mounting cylinders 44 then move the two progressive grinding units 46 in the horizontal direction closer to each other until the row of grinding blocks 464 in the two progressive grinding units 46 touches the sealing surfaces at the left and right ends of the valve body. Then, the self-powered drive ring 45 is controlled to rotate. The drive ring 45 then drives the E-shaped frame 462 to rotate circumferentially through the connecting telescopic rod 461. The E-shaped frame 462 then drives the second screw 4651 to rotate circumferentially. During the circumferential rotation of the second screw 4651, the gear ring 4653 rotates on the end face gear ring 4652. The rotation of the gear ring 4653 causes the second screw 4651, which is threaded to it, to move away from the end face gear ring 4652. As the mounting cylinder 44 moves along its axis, the second screw 4651 then drives the E-shaped frame 462 to move away from the mounting cylinder 44. The E-shaped frame 462 then drives the grinding block 464 to move away from the axis of the mounting cylinder 44. The grinding block 464 moves from the center of the mounting cylinder 44 to the edge while rotating circumferentially with the drive ring 45, thus grinding the sealing surface of the valve body. Since the roughness of the grinding block 464 near the middle of the transverse plate 41 gradually increases from the center of the mounting cylinder 44 to the edge, the valve body sealing surface can be initially ground with a grinding block 464 with a larger roughness, then ground with a grinding block 464 with a lower roughness, and finally ground with a grinding block 464 with fine friction. That is, the valve body sealing surface is ground from the inside to the outside with a gradual roughness from coarse to fine.

[0056] When the grinding block 464 moves outward to separate from the valve body sealing surface, the drive ring 45 is controlled to rotate in the opposite direction. The drive ring 45 then drives the E-shaped bracket 462 to rotate in the opposite direction via the connecting telescopic rod 461. The E-shaped bracket 462 then drives the gear ring 4653 to rotate in the opposite direction along the end face gear ring 4652 via the second screw 4651. The reverse rotation of the gear ring 4653 then drives the second screw 4651 to move towards the axis of the mounting cylinder 44. 651 then moves the E-shaped bracket 462, which in turn moves the rotating column 463. The rotating column 463 then moves the gear 4655 on the rack 4656, causing it to move and rotate. The gear 4655 then rotates the rotating column 463 until it rotates 180 degrees, causing the grinding blocks 464 near the E-shaped bracket 462 to rotate to a position away from the E-shaped bracket 462. At this point, the gear 4655 also moves to the side that is in contact with the mounting cylinder 44. The limit bar 4657 stops the rotation. Then, the second screw 4651 pulls the grinding block 464, which has been rotated and adjusted, towards the mounting cylinder 44 via the E-shaped bracket 462. (After rotation, the roughness arrangement of the grinding block 464 near the valve body is: the roughness gradually decreases along the circumference of the mounting cylinder 44 to the edge). Then, the grinding block 464, after being adjusted, is driven to contact the valve body sealing surface. The grinding block 464 moves from the outside to the inside while rotating circumferentially, that is, the roughness of the valve body sealing surface is gradually ground from the outside to the inside, from coarse to fine, until the grinding block 464 is driven to move inward to the initial position. Thus, the valve body sealing is subjected to two progressive grinding processes. (For the zinc plating layer and other anti-corrosion layers that are sprayed onto the valve body sealing surface after surface treatment, they are ground off during the grinding of the grinding block 464, thereby ensuring the cleanliness and smoothness of the valve body sealing surface).

[0057] By using a grinding method that gradually switches between different roughnesses of grinding blocks 464 from the inside out and from coarse to fine, the surface quality of the valve body sealing surface can be gradually improved, resulting in a smoother and more uniform surface. The automatic switching design of grinding blocks 464 eliminates the tedious operation of frequently changing grinding blocks 464, and also significantly shortens the downtime during the grinding process without frequent machine shutdowns, thus improving processing efficiency.

[0058] Please see Figure 7 and Figure 9In this embodiment, the self-deformable grinding unit 47 includes a first screw 471 fixedly connected to the cavity wall of the mounting cylinder 44 near the vertical slide plate 42. The first screw 471 is externally threaded with a sleeve 472. The end of the sleeve 472 away from the mounting cylinder 44 is fixedly connected to a column rod 474 through a spring telescopic column 473. Both ends of the column rod 474 are fixedly connected with elastic grinding strips 475. The sleeve 472 is axially provided with a sliding groove 476. The drive ring 45 is fixedly connected to an L-shaped slide bar 477 slidably connected in the sliding groove 476 on the side away from the vertical slide plate 42. The right end face of the elastic grinding strip 475 on the left side is provided with an alignment hole 6. The left end face of the elastic grinding strip 475 on the right side is fixedly connected with an alignment post 7 that mates with the alignment hole 6. The two elastic grinding strips 475 that are opposite each other are concave arc-shaped in the middle.

[0059] As the two mounting cylinders 44 move closer to each other, they also cause the two transverse elastic grinding strips 475 to move closer to each other. While the grinding block 464 is driven to abut against the valve body sealing surface, the transverse elastic grinding strips 475 are also fully inserted into the valve body cavity. At this time, the elastic grinding strips 475 are located on the inner wall of the columnar section cavity in the valve body. Then, while the drive ring 45 rotates, it also drives the L-shaped slide bar 477 to rotate. The L-shaped slide bar 477 then drives the sleeve 472 to rotate through the sliding groove 476. The rotation of the sleeve 472 and the No. 1 screw 471 connected to it interact to move, causing the two sleeves 472 to move closer to each other. The sleeves 472 then drive the elastic grinding strips 475 to rotate on the inner wall of the valve body cavity through the spring telescopic column 473 and the column rod 474. While the spring grinding strips rotate, they also move towards the middle of the valve body cavity, thereby grinding the inner wall of the columnar section cavity of the valve body.

[0060] When the opposite ends of the transverse elastic grinding strips 475 move to the middle position of the valve body, the transverse elastic grinding strips 475 drive the alignment pins 7 and alignment holes 6 to insert together, so that the two transverse elastic grinding strips 475 are joined together. Then, the sleeves 472 continue to move closer to the middle of the valve body, applying pressure to the joined elastic grinding strips 475, so that the concave elastic grinding strips 475 in the middle can deform and gradually arch outward until the two joined elastic grinding strips 475 become semi-arc and fit against the inner wall of the spherical section in the middle of the valve body. At this time, the two sleeves 472 continue to move closer to each other, the spring telescopic pins 473 begin to be compressed, and then the elastic grinding strips 475 continue to rotate circumferentially to grind the inner cavity of the valve body after deformation.

[0061] While the grinding block 464 moves from the inside to the outside to grind the valve body sealing surface, the elastic grinding strip 475 also grinds the valve body cavity. Then, while the drive ring 45 rotates in the opposite direction, the sleeve 472 is driven to rotate in the opposite direction and reset through the L-shaped slide bar 477 and the sliding groove 476. The sleeve 472 then interacts with the screw 471 and moves towards the vertical slide plate 42. The sleeve 472 then drives the elastic grinding strip 475 to move towards the vertical slide plate 42 until the elastic grinding strip 475 is driven to move to the initial position.

[0062] The elastic grinding strip 475 adapts automatically to the different deformations of the valve body cavity, ensuring close contact with the valve body cavity wall throughout the grinding process. This allows for uniform grinding of the entire cavity wall, thereby improving grinding quality and smoothness, ensuring the uniformity of the cavity wall surface, and ensuring that all surfaces are evenly ground, thus eliminating grinding dead corners.

[0063] Please see Figure 3 and Figure 10 In this embodiment, the quick-blocking mechanism 5 includes a portal frame 51 fixedly connected to the right side of the mounting bracket 31. The lower end face of the horizontal section of the portal frame 51 is slidably connected to a mounting ring 53 via a spring telescopic support 52. The inner wall of the mounting ring 53 is fixedly connected to a connecting pipe 54 that slides through the horizontal wall panel of the portal frame 51. The two vertical sections of the portal frame 51 are respectively slidably connected to sliding columns 55. The opposite ends of the two sliding columns 55 are fixedly connected to blocking discs 56. The lower end face of the horizontal section of the portal frame 51 is symmetrically connected to sliding strips 57. The mounting ring 53 and the sliding strips 57 are hinged together by a connecting rod 58. The left and right opposite sides of the portal frame 51 are respectively hinged to bidirectional telescopic rods 59 via connecting rods. The upper end of the bidirectional telescopic rod 59 is hinged to the sliding strip 57, and the lower end of the bidirectional telescopic rod 59 is hinged to the sliding column 55.

[0064] The initial position of the portal frame 51 is on the right. The rotation of the mounting rod 31 in the switching section 3 causes the synchronous grinding mechanism 4 to move away from the valve body, simultaneously causing the portal frame 51 to rotate clockwise from its initial position until it reaches a position directly below the valve body. Then, the mounting rod 31 moves the portal frame 51 upwards, which in turn moves the connecting pipe 54 upwards via the mounting ring 53. This causes the connecting pipe 54 to abut against the outer wall of the middle section of the valve body and connect with the downward-facing opening in the middle of the valve body. The connecting pipe 54 is then pushed downwards, causing the mounting ring 53 to move. The mounting ring 53 then pushes the slide bar 57 upwards via the connecting rod 58, causing the slide bar 57 to move towards... As the slide bar 57 moves towards the vertical section of the portal frame 51, it then drives the bidirectional telescopic rod 59 to rotate around the hinge point with the connecting rod. During the rotation of the bidirectional telescopic rod 59, it drives the slide column 55, which is hinged to its other end, to move, causing the two slide columns 55 to move closer to each other. The slide columns 55 then drive the blocking discs 56 to move closer to each other until the blocking discs 56 move and touch the two sealing surfaces of the valve body respectively, thereby sealing the three ports of the valve body at the same time. Then, liquid is introduced into the connecting pipe 54, and the liquid flows into the valve body through the connecting pipe 54. At the same time, the valve body is continuously pressurized, and the surface of the valve body is observed to see if there is water seepage, thus completing the airtightness test of the valve body.

[0065] By simultaneously blocking multiple ports, the operation of adjusting the blocking position one by one is eliminated, which greatly shortens the test preparation time and makes the entire sealing test process more efficient. At the same time, blocking can also ensure that the blocking force applied to each port is consistent, avoiding uneven force caused by blocking one by one, thereby improving the accuracy and reliability of the test results.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A processing technology for an industrial valve, characterized in that: The specific processing steps for industrial valves are as follows: S1. Casting process: The metal is melted and poured into a mold, and after cooling, the initial shape of each component of the valve is formed, resulting in the required blank. S2. Heat treatment: Eliminates internal stress generated during casting or forging, and improves the mechanical properties of the material; S3. Surface treatment: Polish the outer surface of the valve to improve its appearance quality and reduce frictional resistance during media flow. Depending on the valve's operating environment, perform zinc plating, chrome plating, or nickel plating to enhance its corrosion resistance. S4. Refined machining of sealing and cavity surfaces: The valve body's inner cavity and sealing surfaces are simultaneously refined using a synchronous grinding mechanism to ensure the valve's sealing performance. S5. Performance test: The three ports of the valve body are blocked simultaneously by the quick-blocking mechanism. Then, high-temperature liquid and low-temperature liquid are introduced into the valve body under the specified pressure to conduct water pressure test and large temperature difference change test at the same time to check its sealing performance and strength. S6. Component assembly: Assemble the valve body, valve cover, valve stem, and sealing components. Test the assembled valve to ensure that the valve opens and closes flexibly. The industrial valve processing steps in S1-S6 above require the cooperation of a gantry, clamping unit, switching unit, synchronous grinding mechanism, and quick-closing mechanism; among which: A clamping part is installed on the left side of the upper surface of the portal frame. A strip-shaped through groove is opened in the transverse section of the portal frame. A switching part is installed in the strip-shaped through groove. The switching part includes a mounting rod. The left side of the mounting rod is provided with a synchronous grinding mechanism for simultaneously grinding and finishing the valve body sealing surface and the inner cavity wall. The right side of the mounting rod is provided with a quick-blocking mechanism for simultaneously sealing the three ports of the valve body to facilitate rapid sealing testing. The switching part is used to sequentially control the synchronous grinding mechanism and the quick-blocking mechanism to contact the valve body respectively so as to quickly switch to apply different processing steps to the valve body. The synchronous grinding mechanism includes: a horizontal plate fixedly connected to the lower left end face of the mounting rod frame; two vertical slide plates symmetrically slidably connected to the horizontal plate; a bidirectional threaded rod rotatably connected to the horizontal plate and threaded to the two vertical slide plates; mounting cylinders fixedly connected to opposite sides of the vertical slide plates; a drive ring rotatably connected to the outside of the mounting cylinder; a progressive grinding unit jointly set on the mounting cylinder and the drive ring for gradually grinding the valve body sealing surface from rough to fine; and a self-deforming grinding unit jointly set between the two mounting cylinders for adaptive deformation according to the shape of the valve body cavity so as to fit into the valve body cavity. The progressive grinding unit includes: several E-shaped frames slidably connected to the outside of the drive ring via connecting telescopic rods; several rotating columns equidistantly rotatably connected to the E-shaped frames; grinding blocks symmetrically fixed to the outside of the rotating columns via fixing blocks; and a drive assembly set between the E-shaped frames and the mounting cylinder to drive the grinding blocks to grind the valve body sealing surface. The roughness of the row of grinding blocks farther from the E-shaped frame increases sequentially from the inside to the edge along the center of the mounting cylinder, while the roughness of the row of grinding blocks closer to the E-shaped frame decreases sequentially from the inside to the edge along the center of the mounting cylinder. The self-deformation grinding unit includes a No. 1 screw fixedly connected to the cavity wall of the mounting cylinder near the vertical slide plate. A sleeve is threaded to the outside of the No. 1 screw. A column rod is fixedly connected to the end of the sleeve away from the mounting cylinder through a spring telescopic column. An elastic grinding strip is fixedly connected to both ends of the column rod. A sliding groove is opened on the outside of the sleeve along the axial direction. An L-shaped slide bar is fixedly connected to the side of the drive ring away from the vertical slide plate and slidably connected in the sliding groove. The drive assembly includes a No. 2 screw fixedly connected to the side of the E-shaped frame near the mounting cylinder. An end face toothed ring is fixedly connected to the side of the mounting cylinder away from the vertical slide plate. A toothed ring that meshes with the end face toothed ring is externally threaded onto the No. 2 screw. Several slide rods corresponding to the E-shaped frame are circumferentially fixedly connected to the side of the drive ring away from the vertical slide plate via connecting strips. A gear is fixedly connected to the end of the rotating column. Several racks corresponding to and meshing with the gears are slidably connected to the outside of the slide rods at equal intervals. Limiting strips are symmetrically fixedly connected to the side of the racks near the gears.

2. The processing technology of an industrial valve according to claim 1, characterized in that: The right end face of the elastic grinding strip located on the left has an alignment hole, and the left end face of the elastic grinding strip located on the right has an alignment post that mates with the alignment hole.

3. The processing technology of an industrial valve according to claim 1, characterized in that: The two side end faces of the gear ring are respectively fixedly connected with limiting rings for limiting their own position.

4. The processing technology of an industrial valve according to claim 1, characterized in that: The switching unit also includes a turntable rotatably connected to the rear wall of the strip-shaped through groove, a mounting bracket embedded and fixedly connected to the turntable, an arc-shaped guide frame fixedly connected to the front face of the turntable by a fixing post, a stop post slidably connected to the front wall of the strip-shaped through groove by a leaf spring, and an arc-shaped groove that mates with the stop post symmetrically opened in the arc-shaped guide frame.

5. The processing technology of an industrial valve according to claim 1, characterized in that: The quick-blocking mechanism includes a portal frame fixedly connected to the right side of the mounting bracket. The lower end face of the horizontal section of the portal frame is slidably connected to a mounting ring via a spring telescopic support. The inner wall of the mounting ring is fixedly connected to a connecting pipe that slides through the horizontal wall panel of the portal frame. The two vertical sections of the portal frame are slidably connected to sliding columns, and the opposite ends of the two sliding columns are fixedly connected to blocking discs. The lower end face of the horizontal section of the portal frame is symmetrically connected to sliding strips. The mounting ring and the sliding strips are hinged together by a connecting rod. The left and right opposite sides of the portal frame are respectively hinged to bidirectional telescopic rods via connecting rods. The upper end of the bidirectional telescopic rod is hinged to the sliding strip, and the lower end of the bidirectional telescopic rod is hinged to the sliding column.

6. The processing technology of an industrial valve according to claim 1, characterized in that: The clamping part includes two mounting plates that are symmetrically fixed to the upper surface of the portal frame. The two mounting plates are slidably connected to arc-shaped clamping plates on opposite sides via electric telescopic rods. Flexible pads are fixedly connected to the arc-shaped inner walls of the two arc-shaped clamping plates respectively.

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