A sealing surface in-situ detection device and detection method for ball valve body machining

Abstract

The application discloses a sealing surface in-situ detection device and method for ball valve body machining, and relates to the technical field of sealing detection, which comprises a bottom plate and a connecting plate welded on the upper surface of the bottom plate. The bottom plate and the connecting plate are arranged to provide a stable mounting base and support structure for the whole detection device. The bottom plate is made of thickened steel plate and is subjected to rust-proof treatment on the surface to ensure that the equipment remains absolutely stable during the detection process. The connecting plate is used as a load-bearing transition component to effectively transfer the upper load to the bottom plate. A connecting frame is welded on the top end of the connecting plate, and a positioning mechanism for placing the ball valve body is fixed to the end of the connecting frame away from the connecting plate. The connecting frame is arranged to construct a three-dimensional support frame of the device, and provides an accurate mounting reference for the positioning mechanism and the detection system, so that the end face sealing clamping of the ball valve is automatically achieved during the sealing detection of the ball valve.

Description

Technical Field

[0001] The present invention relates to the technical field of seal detection, and specifically to an in-situ detection device and method for the sealing surface of a ball valve body during processing. Background Art

[0002] The sealing performance of a ball valve body is the core index to measure its manufacturing quality and service reliability. Therefore, seal detection is a key process in the processing. To ensure zero leakage of the valve body under harsh working conditions, its seal detection usually follows strict industry standards and standardized processes. The detection mainly focuses on the sealing pairs connecting the valve body and the valve seat, as well as key sealing parts such as the middle flange. Conventional detection uses a hydraulic test bench to conduct strength tests and seal tests. The strength test pressure is usually 1.5 times the nominal pressure to verify the integrity and pressure-bearing capacity of the valve body structure. The seal test uses water or gas at room temperature as the medium, with a pressure of 1.1 times the nominal pressure. Within the specified pressure-holding time, by observing whether the pressure gauge value is stable and whether there are visible leaks or bubbles on each sealing surface of the valve body, the seal performance is accurately determined whether it is qualified.

[0003] In the seal detection link of ball valve body processing, if there are uncertainties in the accuracy, stability or calibration status of the detection mechanism itself, it will have a superimposed effect with the inherent instability of the ball valve seal performance, thus bringing a series of complex risks to product quality judgment and market application. This interaction directly leads to the distortion of the detection results first, and cannot provide a reliable basis for the accurate judgment of the valve body seal level. A valve body that should be qualified may be misjudged as unqualified due to the instantaneous fluctuation of the detection system, resulting in unnecessary product scrapping and increased production costs. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An in-situ detection device for the sealing surface of a ball valve body during processing, including a bottom plate, and a connecting plate welded to the upper surface of the bottom plate; by setting the bottom plate and the connecting plate, a stable installation foundation and support structure are provided for the entire detection device. The bottom plate is made of thickened steel plate and its surface is treated with rust prevention to ensure the absolute stability of the equipment during the detection process; the connecting plate, as a load-bearing transition component, effectively transfers the upper load to the bottom plate; A connecting frame, which is welded to the top of the connecting plate, and a positioning mechanism for placing the ball valve body is fixedly provided at one end of the connecting frame away from the connecting plate. By setting the connecting frame, a three-dimensional support framework of the device is constructed, providing an accurate installation reference for the positioning mechanism and the detection system. By setting the positioning mechanism, the rapid and accurate positioning and reliable fixation of the ball valve body are achieved, ensuring that the valve body does not displace during the detection process, providing a basic condition for accurate detection; An automatic sealing mechanism is provided to automatically seal the openings at both ends of the ball valve body. This automatic sealing mechanism is located on the lower surface of the positioning mechanism. By incorporating this automatic sealing mechanism and employing automated control technology, synchronous sealing of the openings at both ends of the ball valve is achieved, ensuring that the testing process is conducted in a completely sealed environment and improving the reliability of the test results. The testing mechanism is used to inject fluid into the ball valve body. By setting up the testing mechanism, it is responsible for injecting test fluid into the valve body and monitoring pressure changes in real time. Data is collected through precision sensors to provide accurate data for assessing the quality of the sealing surface. The positioning mechanism includes a base, an anti-slip ring fixed to the bottom of the inner wall of the base, a limit frame welded to the outer surface of the base, the limit frame welded to the end of the connecting frame away from the connecting plate, and a connecting ring welded to the lower surface of the base. The base, anti-slip ring, limit frame, and connecting ring constitute the core components of the positioning mechanism. The base is precisely designed according to the valve body shape, the anti-slip ring uses a high-friction coefficient material to ensure the valve body is fixed, the limit frame provides a stable support structure, and the connecting ring enables connection with the detection mechanism below. The automatic sealing mechanism includes a wrapping ring for wrapping the two openings at both ends of the valve ball, and a clamping mechanism is provided on the outer surface of the wrapping ring. By setting up the wrapping ring and the clamping mechanism, an automatic sealing execution system is formed. The wrapping ring achieves initial sealing of the valve body end faces, and the clamping mechanism provides additional clamping force to ensure reliable sealing.

[0005] Preferably, a sliding frame is slidably connected to the inner surface of the limiting frame, a wrapping plate is welded to the top of the sliding frame, a gasket is fixed to the inner surface of the wrapping plate, a first spring is fixed to the outer surface of the sliding frame, a fixing plate is welded to the end of the first spring, and the fixing plate is welded to the lower surface of the limiting frame.

[0006] Preferably, the automatic sealing mechanism further includes a compression frame and a limiting tube. The compression frame is located directly below the placement base. A compression ring is welded to the inner wall of the compression frame, and a compression rod is welded to the inner wall of the compression frame. The top end of the compression rod is columnar. The limiting tube is fixed to the outer surface of the limiting frame.

[0007] Preferably, a sliding rod is slidably connected to the inner cavity of the limiting tube, and a fixing frame is welded to one end of the sliding rod extending to the outer surface of the limiting tube. The fixing frame is welded to the lower surface of the wrapping ring, and an inclined track box is welded to the lower surface of the fixing frame. The sliding rod is slidably connected to the inner cavity of the inclined track box, and a first sealing ring is fixed to the inner wall of the wrapping ring.

[0008] Preferably, the clamping mechanism includes a track tube that penetrates the outer surface of the wrapping ring. A sliding column is slidably connected to the inner cavity of the track tube. A sliding ring is welded to the outer surface of the sliding column. A second spring is welded to the inner wall of the sliding ring. The end of the second spring is fixed to the inner wall of the track tube. A square tube is welded to one end of the sliding column located on the inner surface of the wrapping ring. An extrusion plate is welded to the end of the square tube.

[0009] Preferably, a bent rod is welded to the end of the sliding column away from the extrusion plate, and a toothed plate is welded to the end of the bent rod away from the sliding column. The toothed plate is slidably connected to the outer surface of the wrapping ring. The clamping mechanism also includes a support frame, which is welded to the outer surface of the wrapping ring. A rolling bearing is fixed to the inner wall of the support frame, and a rotating rod is fixed to the inner ring of the rolling bearing. A gear is welded to the outer surface of the rotating rod, and the gear meshes with the toothed plate. A support rod is welded to the outer surface of the rotating rod, and a clamping plate is welded to the end of the support rod. A wrapping pad is fixed to the lower surface of the clamping plate.

[0010] Preferably, the detection mechanism includes a hydraulic cylinder, which is fixed to the lower surface of the connecting ring. A movable column is provided at the output end of the hydraulic cylinder. A connecting frame is welded to the outer surface of the movable column. A third spring is welded to the upper surface of the connecting frame. The top end of the third spring is welded to the lower surface of the extrusion ring.

[0011] Preferably, the detection mechanism further includes a water tank, which is welded to the outer surface of the connecting plate. A pressing plate is welded to the bottom end of the moving column. A second sealing ring is fixed on the outer surface of the pressing plate. The second sealing ring is rubbed against the inner wall of the water tank. A protective pad is fixed on the lower surface of the pressing plate. The protective pad is pressed against the bottom of the inner wall of the water tank.

[0012] Preferably, a bend is passed through the lower surface of the water tank, a switch valve is fixedly installed at the end of the bend, a connecting pipe is fixedly installed at the top of the switch valve, a limiting ring is fitted on the outer surface of the connecting pipe, the limiting ring is fixed on the outer surface of the extrusion frame, a telescopic pipe is fixedly installed at the top of the connecting pipe, a detection chamber is fixedly installed at the top of the telescopic pipe, a water outlet is passed through the outer surface of the detection chamber, the water outlet is welded to the inner wall of the wrapping ring, and a pressure detector is installed at the top of the inner wall of the detection chamber.

[0013] A method for detecting the presence of a sealing surface used in the machining of a ball valve body includes the following steps: Step 1: Place the ball valve body to be tested, after the sealing surface has been machined, horizontally on the placement base of the positioning mechanism, ensuring that the flanges at both ends of the valve body are naturally aligned with the automatic sealing mechanisms on both sides, and that the bottom of the valve body is in full contact with the inner wall of the placement base, using its friction to achieve preliminary circumferential and radial positioning, preventing displacement during the testing process; Step 2: Start the device. The extrusion frame of the automatic sealing mechanism moves downward under the driving action. Through the cooperation of the extrusion rod and the inclined surface of the inclined track box, the vertical movement is converted into horizontal movement, thereby synchronously driving the two wrapping rings on both sides to move towards each other precisely. The first sealing ring fixed on the inner wall of the wrapping ring then tightly presses against the sealing surfaces at both ends of the valve body, forming a preliminary end face seal. While the wrapping ring moves, it triggers the internal clamping mechanism to form a stable detection environment. Step 3: The hydraulic cylinder of the testing mechanism is activated, pushing the moving column and the bottom extrusion plate downward in the water tank, thereby stabilizing the test fluid in the water tank. The extruded fluid flows through the bend, switch valve, connecting pipe and telescopic pipe in sequence, enters the testing chamber, and finally enters the completely sealed internal cavity of the ball valve body through the outlet. Step 4: During the complete pressure holding period, analyze the data recorded by the pressure detector. If the pressure gauge reading remains stable throughout the entire pressure holding process and the fluctuation value is within the allowable error range, it is determined that the ball valve body sealing surface processing quality is qualified and the sealing performance is good. Conversely, if the pressure drops continuously and significantly, it is determined that there is a leakage point on the sealing surface and the product is unqualified.

[0014] This invention provides a device and method for detecting the presence of the sealing surface during ball valve body machining. It offers the following advantages: I. The ball valve body sealing surface in-situ detection device and method, through the setting of a connecting frame, constructs a three-dimensional support frame for the device, providing a precise installation benchmark for the positioning mechanism and detection system. The positioning mechanism enables rapid and accurate positioning and reliable fixation of the ball valve body, ensuring that the valve body does not shift during the detection process, thus providing a fundamental condition for accurate detection.

[0015] II. The in-situ detection device and method for the sealing surface of the ball valve body is designed to achieve synchronous sealing of the openings at both ends of the ball valve by setting up an automatic sealing mechanism and using automated control technology. This ensures that the detection process is carried out in a completely sealed environment, thereby improving the reliability of the detection results. By cooperating with the inclined track box and the inclined surface of the extrusion rod, the vertical movement of the hydraulic cylinder is converted into the horizontal opposing movement of the two wrapping rings, thereby achieving synchronous automatic sealing at both ends of the valve body. During the sealing process, a gear-rack drive clamping mechanism is triggered to apply radial clamping force on the basis of the initial end face seal, forming a double sealing guarantee and improving sealing reliability and adaptability. The radial clamping system is composed of a track tube, sliding column, sliding ring, second spring, square tube and extrusion plate. The track tube provides precise guidance for the sliding column; the sliding column transmits the clamping force; the sliding ring ensures smooth movement; the second spring provides the initial clamping force and absorbs vibration; the square tube enhances the structural rigidity, and at the same time, when the sliding column and sliding ring slide laterally in the inner cavity of the track tube, they only produce lateral movement and do not rotate; the extrusion plate directly contacts the valve body surface, and when the wrapping ring is squeezed against the end opening of the ball valve body, the extrusion plate drives the square tube and sliding column to move laterally.

[0016] III. The in-situ detection device and method for the sealing surface of the ball valve body is designed to inject detection fluid into the valve body and monitor pressure changes in real time by setting up a detection mechanism. Data is collected by a precision sensor to provide an accurate basis for the quality assessment of the sealing surface.

[0017] IV. The sealing surface in-situ detection device and detection method for the ball valve body machining constitute the drive system of the automatic sealing mechanism by setting up an extrusion frame, an extrusion ring, an extrusion rod and a limiting tube. The extrusion frame serves as a power transmission frame, converting hydraulic power into sealing action; the extrusion ring achieves uniform force distribution, ensuring balanced sealing pressure; the extrusion rod converts vertical motion into horizontal sealing motion through an inclined plane mechanism; the limiting tube provides precise motion guidance for the sealing mechanism, preventing deflection.

[0018] V. The sealing surface in-situ detection device and detection method for the ball valve body machining constitute a precise motion conversion and sealing system by setting up a sliding rod, a fixed frame, an inclined track box and a first sealing ring. The sliding rod slides precisely within the limiting tube to ensure the linearity of the movement; the fixed frame connects various moving parts and transmits the sealing force; the inclined track box realizes the conversion of the movement direction through the inclined surface design; the first sealing ring is made of pressure-resistant and wear-resistant material to ensure reliable sealing under high pressure environment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of a sealing surface in-situ detection device for ball valve body processing according to the present invention; Figure 2This is a side view of the structure of a sealing surface in-situ detection device for ball valve body machining according to the present invention; Figure 3 This is a partial structural schematic diagram of a sealing surface in-situ detection device for ball valve body processing according to the present invention; Figure 4 This is a schematic diagram of the positioning mechanism structure of the present invention; Figure 5 This is a schematic diagram of the opening structure of the automatic sealing mechanism of the present invention; Figure 6 This is a schematic diagram of the closed structure of the automatic sealing mechanism of the present invention; Figure 7 This is a partial structural diagram of the automatic sealing mechanism of the present invention; Figure 8 This is a schematic diagram of the clamping mechanism of the present invention; Figure 9 This is a schematic diagram of the detection mechanism of the present invention; Figure 10 This is a partial cross-sectional structural diagram of the detection mechanism of the present invention.

[0020] In the diagram: 1. Base plate; 2. Connecting plate; 3. Connecting frame; 4. Positioning mechanism; 41. Limiting frame; 42. Placement base; 43. Connecting ring; 44. Anti-slip ring; 45. Sliding frame; 46. Fixing plate; 47. First spring; 48. Wrapping plate; 49. Gasket; 5. Automatic sealing mechanism; 51. Extrusion frame; 52. Extrusion ring; 53. Limiting ring; 54. Extrusion rod; 55. Limiting tube; 56. Sliding rod; 57. Fixing frame; 58. Enveloping ring; 59. Clamping mechanism; 510. Inclined track box; 511. First sealing ring; 591. Track tube; 592. Sliding column; 593. Sliding ring; 594. Second spring; 595. Square tube; 596. Extrusion plate; 597. Bent rod; 598. Toothed plate; 599. Support frame; 5910. Rolling bearing; 5911. Rotating rod; 5912. Gear; 5913. Support rod; 5914. Clamping plate; 5915. Enveloping pad; 6. Testing mechanism; 61. Hydraulic cylinder; 62. Moving column; 63. Connecting frame; 64. Third spring; 65. Extrusion plate; 66. Second sealing ring; 67. Protective pad; 68. Water tank; 69. Bend; 610. Switch valve; 611. Connecting pipe; 612. Telescopic pipe; 613. Testing chamber; 614. Pressure detector; 615. Water outlet. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] like Figures 1-10 As shown, the present invention provides a technical solution: a sealing surface in-situ detection device for ball valve body processing, including a base plate 1 and a connecting plate 2 welded to the upper surface of the base plate 1; by setting the base plate 1 and the connecting plate 2, a stable installation foundation and support structure are provided for the entire detection device; the base plate 1 is made of thickened steel plate and the surface is treated with anti-rust to ensure that the equipment remains absolutely stable during the detection process; the connecting plate 2 serves as a load-bearing transition component, effectively transferring the upper load to the base plate 1; A connecting frame 3 is welded to the top of the connecting plate 2. A positioning mechanism 4 for placing the ball valve body is fixed at the end of the connecting frame 3 away from the connecting plate 2. By setting up the connecting frame 3, a three-dimensional support frame for the device is constructed, providing a precise installation reference for the positioning mechanism 4 and the detection system. The positioning mechanism 4 enables rapid and accurate positioning and reliable fixing of the ball valve body, ensuring that the valve body does not shift during the detection process, thus providing a foundation for accurate detection. An automatic sealing mechanism 5 is used to automatically seal the openings at both ends of the ball valve body. The automatic sealing mechanism 5 is located on the lower surface of the positioning mechanism 4. By setting up the automatic sealing mechanism 5, the synchronous sealing of the openings at both ends of the ball valve is achieved using automated control technology, ensuring that the testing process is carried out in a completely sealed environment and improving the reliability of the test results. The detection mechanism 6 is used to inject fluid into the ball valve body. By setting up the detection mechanism 6, it is responsible for injecting test fluid into the valve body and monitoring pressure changes in real time. Data is collected through precision sensors to provide an accurate basis for evaluating the quality of the sealing surface. The positioning mechanism 4 includes a base 42, an anti-slip ring 44 fixed to the bottom of the inner wall of the base 42, a limit frame 41 welded to the outer surface of the base 42, the limit frame 41 welded to the end of the connecting frame 3 away from the connecting plate 2, and a connecting ring 43 welded to the lower surface of the base 42. The base 42, anti-slip ring 44, limit frame 41, and connecting ring 43 constitute the core components of the positioning mechanism 4. The base 42 is precisely designed according to the shape of the valve body, the anti-slip ring 44 uses a high-friction coefficient material to ensure the valve body is fixed, the limit frame 41 provides a stable support structure, and the connecting ring 43 enables connection with the detection mechanism 6 below. The automatic sealing mechanism 5 includes a wrapping ring 58, which is used to wrap around the two openings at both ends of the valve ball. A clamping mechanism 59 is provided on the outer surface of the wrapping ring 58. By setting the wrapping ring 58 and the clamping mechanism 59, an automatic sealing execution system is formed. The wrapping ring 58 achieves the initial sealing of the valve body end face, and the clamping mechanism 59 provides additional clamping force to ensure the reliability of the seal.

[0023] A sliding frame 45 is slidably connected to the inner surface of the limiting frame 41. A wrapping plate 48 is welded to the top of the sliding frame 45. A gasket 49 is fixed to the inner surface of the wrapping plate 48. A first spring 47 is fixed to the outer surface of the sliding frame 45. A fixing plate 46 is welded to the end of the first spring 47 and welded to the lower surface of the limiting frame 41. By setting up the sliding frame 45, the wrapping plate 48, the gasket 49, the first spring 47, and the fixing plate 46, an auxiliary positioning and buffering system for the valve body is formed. The sliding frame 45 slides stably inside the limiting frame 41, ensuring smooth movement of the wrapping plate 48. The wrapping plate 48 squeezes the valve body from both sides to prevent the valve body from shaking during the detection process. The gasket 49 is made of elastic material to avoid damage to the surface of the valve body. The first spring 47 provides a stable preload force and automatically adapts to valve bodies of different widths. The fixing plate 46 provides a reliable mounting base for the first spring 47.

[0024] The automatic sealing mechanism 5 also includes a compression frame 51 and a limiting tube 55. The compression frame 51 is located directly below the base 42. A compression ring 52 is welded to the inner wall of the compression frame 51, and a compression rod 54 is welded to the inner wall of the compression frame 51. The top of the compression rod 54 is columnar. The limiting tube 55 is fixed to the outer surface of the limiting frame 41. By setting up the compression frame 51, compression ring 52, compression rod 54, and limiting tube 55, the drive system of the automatic sealing mechanism 5 is formed. The compression frame 51 acts as a power transmission frame, converting hydraulic power into sealing action; the compression ring 52 achieves uniform force distribution, ensuring balanced sealing pressure; the compression rod 54 converts vertical motion into horizontal sealing motion through an inclined plane mechanism; and the limiting tube 55 provides precise motion guidance for the sealing mechanism, preventing deflection. A sliding rod 56 is slidably connected to the inner cavity of the limiting tube 55. A fixing frame 57 is welded to one end of the sliding rod 56 extending to the outer surface of the limiting tube 55. The fixing frame 57 is welded to the lower surface of the wrapping ring 58. An inclined track box 510 is welded to the lower surface of the fixing frame 57. The sliding rod 56 is slidably connected to the inner cavity of the inclined track box 510. A first sealing ring 511 is fixed to the inner wall of the wrapping ring 58. By setting up the sliding rod 56, the fixing frame 57, the inclined track box 510, and the first sealing ring 511, a precise motion conversion and sealing system is formed. The sliding rod 56 slides precisely within the limiting tube 55 to ensure the linearity of the motion; the fixing frame 57 connects various moving parts and transmits the sealing force; the inclined track box 510 achieves the conversion of the motion direction through its inclined surface design; the first sealing ring 511 is made of pressure-resistant and wear-resistant material to ensure reliable sealing under high pressure.

[0025] The clamping mechanism 59 includes a track tube 591 that penetrates the outer surface of the wrapping ring 58. A sliding post 592 is slidably connected to the inner cavity of the track tube 591. A sliding ring 593 is welded to the outer surface of the sliding post 592. A second spring 594 is welded to the inner wall of the sliding ring 593. The end of the second spring 594 is fixed to the inner wall of the track tube 591. A square tube 595 is welded to one end of the sliding post 592 located on the inner surface of the wrapping ring 58. An extrusion plate 596 is welded to the end of the square tube 595. A radial clamping system is constructed by setting up a track tube 591, a sliding column 592, a sliding ring 593, a second spring 594, a square tube 595, and a pressing plate 596. The track tube 591 provides precise guidance for the sliding column 592; the sliding column 592 transmits the clamping force; the sliding ring 593 ensures smooth movement; the second spring 594 provides initial clamping force and absorbs vibration; the square tube 595 enhances structural rigidity and ensures that when the sliding column 592 and the sliding ring 593 slide laterally within the inner cavity of the track tube 591, they only move laterally and do not rotate; the pressing plate 596 directly contacts the valve body surface, and when the wrapping ring 58 is pressed against the end opening of the ball valve body, the pressing plate 596 drives the square tube 595 and the sliding column 592 to move laterally. A bent rod 597 is welded to one end of the 92 away from the extrusion plate 596. A toothed plate 598 is welded to one end of the bent rod 597 away from the sliding column 592. The toothed plate 598 is slidably connected to the outer surface of the wrapping ring 58. The clamping mechanism 59 also includes a support frame 599, which is welded to the outer surface of the wrapping ring 58. A rolling bearing 5910 is fixed to the inner wall of the support frame 599. A rotating rod 5911 is fixed to the inner ring of the rolling bearing 5910. A gear 5912 is welded to the outer surface of the rotating rod 5911. The gear 5912 meshes with the toothed plate 598. A support rod 5913 is welded to the outer surface of the rotating rod 5911. A clamping plate 5914 is welded to the end of the support rod 5913. A wrapping pad 5915 is fixed to the lower surface of the clamping plate 5914.By incorporating a bent rod 597, a toothed plate 598, a support frame 599, a rolling bearing 5910, a rotating rod 5911, a gear 5912, a support rod 5913, a clamping plate 5914, and a wrapping pad 5915, a multi-stage linkage clamping system is constructed. The bent rod 597 converts linear motion into the motion of the toothed plate 598; the meshing of the toothed plate 598 with the gear 5912 achieves the conversion of motion mode. When the toothed plate 598 moves laterally with the bent rod 597, it meshes with the gear 5912, thereby causing the gear 5912 to move. 912 drives the rotating rod 5911 and the support rod 5913 to rotate; the support frame 599 provides a stable bearing mounting base, positioning the rolling bearing 5910 on the outer surface of the wrapping ring 58; the rolling bearing 5910 ensures smooth rotation, enabling the rotating rod 5911 to rotate stably, while transmitting torque so that the rotation of the gear 5912 drives the rotation of the support rod 5913; the clamping plate 5914 provides a large clamping surface and cooperates with the wrapping pad 5915 to increase friction while protecting the valve body surface.

[0026] The detection mechanism 6 includes a hydraulic cylinder 61, which is fixed to the lower surface of the connecting ring 43. A moving column 62 is mounted at the output end of the hydraulic cylinder 61. A connecting frame 63 is welded to the outer surface of the moving column 62, and a third spring 64 is welded to the upper surface of the connecting frame 63. The top of the third spring 64 is welded to the lower surface of the extrusion ring 52. The hydraulic cylinder 61, moving column 62, connecting frame 63, and third spring 64 constitute the power system of the detection mechanism 6. The hydraulic cylinder 61 provides a stable and reliable driving force with precise pressure control; the moving column 62 transmits hydraulic power to the actuators; the connecting frame 63 integrates the various components; and the third spring 64 provides buffering and reset functions to ensure smooth system operation. Simultaneously, when the moving column 62 initially moves downwards, the third spring 64 drives the extrusion ring 52 downwards. When the enclosing ring 58 is in close contact with the ball valve body opening and can no longer move laterally, the third spring 64 is pulled, thus not affecting the continued movement of the bottom end of the moving column 62.

[0027] The testing mechanism 6 also includes a water tank 68, which is welded to the outer surface of the connecting plate 2. A pressure plate 65 is welded to the bottom end of the moving column 62. A second sealing ring 66 is fixed to the outer surface of the pressure plate 65, and the second sealing ring 66 is frictionally fitted with the inner wall of the water tank 68. A protective pad 67 is fixed to the lower surface of the pressure plate 65, and the protective pad 67 is pressure-fitted with the bottom of the inner wall of the water tank 68. By setting up the water tank 68, pressure plate 65, second sealing ring 66, and protective pad 67, a fluid pressure generating system is formed. The water tank 68 stores the test fluid, and its capacity is precisely calculated. The pressure plate 65 converts mechanical energy into fluid pressure energy. The second sealing ring 66 ensures a reliable seal between the pressure plate 65 and the wall of the water tank 68, preventing pressure leakage. The protective pad 67 avoids direct metal-to-metal contact, reducing wear and noise. A bent pipe 69 runs through the lower surface of the water tank 68, and a switch is fixed to the end of the bent pipe 69. Valve 610, the top of the switch valve 610 is fixed with a connecting pipe 611, the outer surface of the connecting pipe 611 is fitted with a limiting ring 53, the limiting ring 53 is fixed on the outer surface of the extrusion frame 51, the top of the connecting pipe 611 is fixed with a telescopic pipe 612, the top of the telescopic pipe 612 is fixed with a detection chamber 613, the outer surface of the detection chamber 613 is penetrated by a water outlet 615, the water outlet 615 is welded to the inner wall of the wrapping ring 58, and a pressure detector 614 is installed at the top of the inner wall of the detection chamber 613. A complete fluid delivery and pressure monitoring system is constructed by setting up a bend 69, a switching valve 610, a connecting pipe 611, a limiting ring 53, a telescopic pipe 612, a detection chamber 613, a water outlet 615, and a pressure detector 614. The bend 69 optimizes the fluid path and reduces resistance; the switching valve 610 precisely controls the flow of fluid, preventing liquid from flowing out of the inner cavity of the water tank 68 when the ball valve body is not being detected; the connecting pipe 611 establishes a delivery channel and cooperates with the limiting ring 53 to achieve the effect of fixing it in a designated position; the telescopic pipe 612 compensates for the displacement of the mechanism, and can deform when the wrapping ring 58 moves laterally; the water outlet 615 ensures uniform fluid injection; and the pressure detector 614 monitors the pressure changes in the inner cavity of the detection chamber 613 in real time.

[0028] A method for detecting the presence of a sealing surface used in the machining of a ball valve body includes the following steps: Step 1: Place the ball valve body to be tested, after the sealing surface has been machined, horizontally on the placement base 42 of the positioning mechanism 4, ensuring that the flanges at both ends of the valve body are naturally aligned with the automatic sealing mechanisms 5 on both sides, and that the bottom of the valve body is in full contact with the inner wall of the placement base 42, using its friction to achieve preliminary circumferential and radial positioning, and preventing displacement during the testing process. Step 2: Start the device. The extrusion frame 51 of the automatic sealing mechanism 5 moves downward under the driving action. Through the extrusion rod 54 and the inclined surface of the inclined track box 510, the vertical movement is converted into horizontal movement, thereby synchronously driving the two sides of the wrapping ring 58 to move towards each other precisely. The first sealing ring 511 fixed on the inner wall of the wrapping ring 58 then tightly presses against the sealing surfaces at both ends of the valve body, forming a preliminary end face seal. While the wrapping ring 58 moves, it triggers the clamping mechanism 59 inside, forming a stable detection environment. Step 3: The hydraulic cylinder 61 of the detection mechanism 6 is activated, pushing the moving column 62 and the bottom extrusion plate 65 to move downward in the water tank 68, thereby stabilizing the detection fluid in the water tank 68. The extruded fluid flows through the bend pipe 69, the switch valve 610, the connecting pipe 611 and the telescopic pipe 612 in sequence, enters the detection chamber 613, and finally enters the completely sealed internal cavity of the ball valve body through the outlet 615. Step 4: During the complete pressure holding period, analyze the data recorded by the pressure detector 614. If the pressure gauge reading remains stable throughout the entire pressure holding process and the fluctuation value is within the allowable error range, it is determined that the ball valve body sealing surface processing quality is qualified and the sealing performance is good. Conversely, if the pressure drops continuously and significantly, it is determined that there is a leakage point on the sealing surface and the product is unqualified.

[0029] Working principle: The ball valve body to be tested, after the sealing surface has been processed, is placed horizontally on the placement base 42 of the positioning mechanism 4, ensuring that the flanges at both ends of the valve body are naturally aligned with the automatic sealing mechanism 5 above. At the same time, the bottom of the valve body is in full contact with the anti-slip ring 44 inside the placement base 42, and the friction force is used to achieve preliminary circumferential and radial positioning to prevent displacement during the testing process. During the process, under the elastic potential energy of the first spring 47, the wrapping plate 48 and the gasket 49 move toward the surface of the ball valve to achieve the preliminary positioning of the ball valve. Start the hydraulic cylinder 61, which causes the moving column 62 at the output end to move the connecting frame 63 downward, thereby causing the extrusion ring 52 and the extrusion frame 51 to move the extrusion rod 54 downward. Through the cooperation of the extrusion rod 54 with the inclined surface of the inclined track box 510, the vertical motion is converted into horizontal motion, thereby synchronously driving the two wrapping rings 58 to move towards each other precisely. The first sealing ring 511 fixed on the inner wall of the wrapping ring 58 then tightly presses against the sealing surfaces at both ends of the valve body, forming a preliminary end face seal. While the wrapping ring 58 moves, it triggers the clamping mechanism 59 inside, forming a stable detection environment. While the wrapping ring 58 is in contact with the end face of the ball valve, the extrusion plate 596 is extruded, which causes the sliding column 592 to drive the bent rod 597 and the toothed plate 598 to move laterally, and finally causes the gear 5912 to drive the rotating rod 5911 and the support rod 5913 to rotate, and causes the clamping plate 5914 and the wrapping pad 5915 to wrap around the end of the ball valve. The hydraulic cylinder 61 of the testing mechanism 6 continues to work, pushing the moving column 62 and the bottom extrusion plate 65 downward in the water tank 68, thereby stabilizing the pressure of the test fluid in the water tank 68. The pressure-out fluid flows sequentially through the bend 69, the switch valve 610, the connecting pipe 611, and the telescopic pipe 612, and enters the testing chamber 613. Finally, it is injected into the completely sealed internal cavity of the ball valve body through the outlet 615. During the complete pressure holding cycle, the data recorded by the pressure detector 614 is analyzed. If the pressure gauge reading remains stable throughout the pressure holding process and the fluctuation value is within the allowable error range, it is determined that the ball valve body sealing surface processing quality is qualified and the sealing performance is good. Conversely, if the pressure drops continuously and significantly, it is determined that there is a leakage point on the sealing surface and the product is unqualified.

[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A device for detecting the presence of a sealing surface during ball valve body machining, characterized in that, include: The base plate (1) and the connecting plate (2) welded to the upper surface of the base plate (1); A connecting frame (3) is welded to the top of the connecting plate (2), and a positioning mechanism (4) for placing the ball valve body is fixed at one end of the connecting frame (3) away from the connecting plate (2). Automatic sealing mechanism (5) is used to automatically seal the openings at both ends of the ball valve body. The automatic sealing mechanism (5) is disposed on the lower surface of the positioning mechanism (4). The testing mechanism (6) is used to inject fluid into the ball valve body; The positioning mechanism (4) includes a placement base (42), an anti-slip ring (44) is fixedly provided at the bottom of the inner wall of the placement base (42), a limit frame (41) is welded to the outer surface of the placement base (42), the limit frame (41) is welded to the end of the connecting frame (3) away from the connecting plate (2), and a connecting ring (43) is welded to the lower surface of the placement base (42). The automatic sealing mechanism (5) includes a wrapping ring (58) for wrapping the two openings of the valve ball. The outer surface of the wrapping ring (58) is provided with a clamping mechanism (59).

2. The ball valve body machining sealing surface presence detection device according to claim 1, characterized in that: The inner surface of the limiting frame (41) is slidably connected to a sliding frame (45). A wrapping plate (48) is welded to the top of the sliding frame (45). A gasket (49) is fixed to the inner surface of the wrapping plate (48). A first spring (47) is fixed to the outer surface of the sliding frame (45). A fixing plate (46) is welded to the end of the first spring (47). The fixing plate (46) is welded to the lower surface of the limiting frame (41).

3. The ball valve body machining sealing surface presence detection device according to claim 1, characterized in that: The automatic sealing mechanism (5) further includes a compression frame (51) and a limiting tube (55). The compression frame (51) is located directly below the placement base (42). A compression ring (52) is welded to the inner wall of the compression frame (51). A compression rod (54) is welded to the inner wall of the compression frame (51). The top of the compression rod (54) is columnar. The limiting tube (55) is fixed to the outer surface of the limiting frame (41).

4. The ball valve body machining sealing surface presence detection device according to claim 3, characterized in that: A sliding rod (56) is slidably connected to the inner cavity of the limiting tube (55). A fixing frame (57) is welded to one end of the sliding rod (56) extending to the outer surface of the limiting tube (55). The fixing frame (57) is welded to the lower surface of the wrapping ring (58). An inclined track box (510) is welded to the lower surface of the fixing frame (57). The sliding rod (56) is slidably connected to the inner cavity of the inclined track box (510). A first sealing ring (511) is fixed to the inner wall of the wrapping ring (58).

5. The ball valve body machining sealing surface presence detection device according to claim 1, characterized in that: The clamping mechanism (59) includes a track tube (591) that penetrates the outer surface of the wrapping ring (58). A sliding column (592) is slidably connected to the inner cavity of the track tube (591). A sliding ring (593) is welded to the outer surface of the sliding column (592). A second spring (594) is welded to the inner wall of the sliding ring (593). The end of the second spring (594) is fixed to the inner wall of the track tube (591). A square tube (595) is welded to one end of the sliding column (592) located on the inner surface of the wrapping ring (58). An extrusion plate (596) is welded to the end of the square tube (595).

6. The ball valve body machining sealing surface presence detection device according to claim 5, characterized in that: A bent rod (597) is welded to one end of the sliding column (592) away from the extrusion plate (596), and a toothed plate (598) is welded to the other end of the bent rod (597) away from the sliding column (592). The toothed plate (598) is slidably connected to the outer surface of the wrapping ring (58). The clamping mechanism (59) also includes a support frame (599), which is welded to the outer surface of the wrapping ring (58). A rolling bearing (591) is fixed to the inner wall of the support frame (599). 0), a rotating rod (5911) is fixedly provided at the inner ring of the rolling bearing (5910). A gear (5912) is welded to the outer surface of the rotating rod (5911). The gear (5912) meshes with the gear plate (598). A support rod (5913) is welded to the outer surface of the rotating rod (5911). A clamping plate (5914) is welded to the end of the support rod (5913). A wrapping pad (5915) is fixedly provided on the lower surface of the clamping plate (5914).

7. The ball valve body machining sealing surface presence detection device according to claim 6, characterized in that: The detection mechanism (6) includes a hydraulic cylinder (61), which is fixed on the lower surface of the connecting ring (43). The output end of the hydraulic cylinder (61) is provided with a moving column (62). A connecting frame (63) is welded to the outer surface of the moving column (62). A third spring (64) is welded to the upper surface of the connecting frame (63). The top of the third spring (64) is welded to the lower surface of the extrusion ring (52).

8. The ball valve body machining sealing surface presence detection device according to claim 7, characterized in that: The testing mechanism (6) also includes a water tank (68), which is welded to the outer surface of the connecting plate (2). The bottom end of the moving column (62) is welded with a pressing plate (65). A second sealing ring (66) is fixed on the outer surface of the pressing plate (65). The second sealing ring (66) is rubbed against the inner wall of the water tank (68). A protective pad (67) is fixed on the lower surface of the pressing plate (65). The protective pad (67) is pressed against the bottom of the inner wall of the water tank (68).

9. The ball valve body machining sealing surface presence detection device according to claim 8, characterized in that: A bend (69) is passed through the lower surface of the water tank (68). A switch valve (610) is fixed at the end of the bend (69). A connecting pipe (611) is fixed at the top of the switch valve (610). A limiting ring (53) is fitted on the outer surface of the connecting pipe (611). The limiting ring (53) is fixed on the outer surface of the extrusion frame (51). A telescopic pipe (612) is fixed at the top of the connecting pipe (611). A detection chamber (613) is fixed at the top of the telescopic pipe (612). An outlet (615) is passed through the outer surface of the detection chamber (613). The outlet (615) is welded to the inner wall of the wrapping ring (58). A pressure detector (614) is installed at the top of the inner wall of the detection chamber (613).

10. A method for detecting the presence of a sealing surface during ball valve body machining, characterized in that, The device for detecting the presence of sealing surfaces in ball valve body machining, based on any one of claims 1 to 9, includes the following steps: Step 1: Place the ball valve body to be tested, after the sealing surface has been processed, horizontally on the placement base (42) of the positioning mechanism (4), ensuring that the flanges at both ends of the valve body are naturally aligned with the automatic sealing mechanisms (5) on both sides, and at the same time, the bottom of the valve body is in full contact with the inner wall of the placement base (42), using its friction to achieve preliminary circumferential and radial positioning, and preventing displacement during the testing process; Step 2: Start the device. The automatic sealing mechanism (5) moves downward under the driving action. By converting the vertical movement into the horizontal movement, it drives the two sides of the wrapping ring (58) to move towards each other in a precise manner. The inner wall of the wrapping ring (58) then tightly presses against the sealing surface at both ends of the valve body to form a preliminary end face seal. While the wrapping ring (58) moves, it triggers the clamping mechanism (59) inside to form a stable detection environment. Step 3: The detection mechanism (6) is started, and the internal detection fluid is steadily pressed out. The pressed-out fluid flows and is injected into the internal cavity of the ball valve body, which has been completely sealed. Step 4: During the complete pressure holding period, analyze the data recorded by the testing agency (6). If the pressure gauge reading remains stable throughout the entire pressure holding process and the fluctuation value is within the allowable error range, then the ball valve body sealing surface processing quality is qualified and the sealing performance is good. Conversely, if the pressure drops continuously and significantly, then the sealing surface has a leakage point and the product is unqualified.

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