In-situ topography measurement system and method for sealing surfaces of valve seat
Patent Information
- Application Number
- PCT/CN2025/121165
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-24
- Filing Date
- 2025-09-12
- Publication Date
- 2026-10-01
Smart Images
Figure CN2025121165_01102026_PF_FP_ABST
Abstract
Description
An in-situ morphology measurement system and method for valve seat sealing surfaces. Technical Field
[0001] This application belongs to the field of precision testing technology, and in particular relates to an in-situ morphology measurement system and method for valve seat sealing surfaces. Background Technology
[0002] The valve seat sealing surface is one of the most important components of a valve, its primary function being to ensure the valve's sealing performance. During valve operation, a sealed interface is formed between the valve seat sealing surface and the valve core sealing surface to prevent media leakage. The quality and machining precision of the valve seat sealing surface directly affect the valve's sealing performance. Furthermore, during valve use, mechanical wear, erosion and corrosion occur due to media movement, and electrochemical corrosion arises from the concentration difference of the pressurized medium between the valve seat and valve disc, causing electrochemical corrosion on both sides of the sealing surface. All these factors can damage the sealing surface. Defects or substandard sealing surfaces can directly lead to media leakage or other safety issues.
[0003] Therefore, ensuring the sealing performance of the valve seat sealing surface is of great importance for the normal operation and safety of the valve. Besides paying attention to the material and processing technology of the valve seat sealing surface when selecting valves, regular inspection and maintenance of the valve seat sealing surface are also necessary measures.
[0004] Currently, there are several problems with the methods for measuring valve seat sealing surfaces, including:
[0005] Measurement space issues: The valve seat cavity is relatively deep, and the sealing surface is located at the bottom of the cavity and close to the mirror surface. Traditional structured light measurement solutions cannot meet the requirements due to issues with backlighting and accuracy.
[0006] Measurement reference issues: The measurement coverage is large, requiring the introduction of a motion system; however, the on-site measurement space is narrow, necessitating a portable and easy-to-use measuring device. Traditional mechanical transmission systems introduce motion errors and cannot adapt to different valve installation positions.
[0007] Irradiation problem inside the valve cavity: Electronic components of general photoelectric profile measuring instruments may malfunction due to irradiation problems inside the valve cavity.
[0008] Motion runout during measurement: Scanning motion or other movements during the measurement process can cause motion runout, which may affect measurement accuracy, especially at high-precision measurement levels. It is necessary to filter out the errors caused by motion runout. Technical issues
[0009] The purpose of this application is to provide an in-situ topography measurement system for valve seat sealing surfaces, aiming to solve at least one of the above-mentioned problems. Technical solutions
[0010] This application embodiment is implemented as follows: an in-situ topography measurement system for valve seat sealing surfaces, comprising:
[0011] A support assembly for fixed connection with a valve seat, wherein at least a portion of the support assembly is disposed within the valve cavity of the valve seat;
[0012] The first ranging module includes a plurality of first distance sensors, which are respectively disposed on the support assembly. Each first distance sensor is used to perform spatial scanning on a portion of the sealing surface of the valve seat. The scanning areas of adjacent first distance sensors partially overlap to cover the sealing surface.
[0013] In one embodiment, the support assembly includes a mounting portion and a bracket, the mounting portion being fixedly disposed on the outer surface of the valve seat, the bracket being connected to the mounting portion, and at least a portion of the bracket being located within the valve cavity; each of the first distance sensors is fixedly disposed on the bracket.
[0014] In one embodiment, the support assembly further includes a movable module disposed on the mounting portion, the bracket being connected to the movable module, and the movable module being used to drive the bracket to move within the valve cavity via the opening of the valve seat.
[0015] In one embodiment, the moving module is a linear moving module, which is used to drive the bracket to move along the opening direction of the opening.
[0016] In one embodiment, the in-situ topography measurement system for the valve seat sealing surface further includes a third ranging module, which is disposed on the side of the bracket opposite to the mounting portion, and is used to perform spatial scanning of the inner bottom wall of the valve cavity along the opening direction of the opening.
[0017] In one embodiment, the mounting portion is annular and is used for fixed connection with the flange of the valve seat; the flange has an opening communicating with the valve cavity, and at least a portion of the bracket is located in the valve cavity via the opening.
[0018] In one embodiment, the in-situ topography measurement system for the valve seat sealing surface further includes a second ranging module, the second ranging module including at least one second distance sensor, the second distance sensor being disposed on the support assembly and fixed relative to the first distance sensor; the second distance sensor is used to perform spatial scanning of a reference position on the inner wall of the valve seat.
[0019] In one embodiment, the inner wall of the valve seat is provided with at least two opposing second guide portions; the number of second distance sensors is at least two and they are located between the second guide portions, and the second distance sensors are used to perform spatial scanning on the surface of the second guide portions.
[0020] In one embodiment, the in-situ morphology measurement system for the valve seat sealing surface further includes a processing module, which is communicatively connected to both the first distance sensor and the second distance sensor, for receiving scanning information from the first distance sensor and the second distance sensor, and for calculating the morphology of the sealing surface.
[0021] In one embodiment, the first distance sensor is a bidirectional distance sensor, and each of the first distance sensors is used to perform a spatial scan of a portion of the sealing surfaces on both sides.
[0022] Another objective of this application is to provide an in-situ morphology measurement method for valve seat sealing surfaces, including:
[0023] The first ranging module performs a spatial scan of the valve seat's sealing surface to obtain the first scan information;
[0024] The spatial position information, spatial size information, and surface parameters of the sealing surface are calculated based on the first scanning information.
[0025] In one embodiment, it further includes:
[0026] The second ranging module performs a spatial scan of the reference position within the valve cavity of the valve seat to obtain second scan information.
[0027] The spatial position information, spatial size information, and surface parameters of the reference position are calculated based on the second scanning information; and
[0028] The spatial position information, spatial size information, and surface parameters of the sealing surface are calculated based on the second scanning information and the first scanning information.
[0029] In one embodiment, the method further includes: moving the first ranging module into the valve cavity via the opening of the valve cavity of the valve seat, and performing spatial scanning towards the inner bottom wall of the valve cavity of the valve seat using the third ranging module.
[0030] In one embodiment, the method further includes: confirming the distance between the third ranging module and the inner bottom wall of the valve cavity.
[0031] In one embodiment, the method further includes: confirming whether there are obstacles on the movement path of the first ranging module.
[0032] The in-situ morphology measurement system and method for valve seat sealing surfaces provided in this application have the following advantages:
[0033] The in-situ topography measurement system for valve seat sealing surfaces provided in this application embodiment places multiple first distance sensors inside the valve cavity of the valve seat through a support assembly. Each first distance sensor is used to perform spatial scanning of a portion of the sealing surface. The overall topography of the sealing surface is obtained by splicing and merging the scanning results of multiple first distance sensors. It is not necessary to scan the entire sealing surface by moving the first distance measuring module inside the valve cavity. The use of movement control mechanical components can be eliminated, reducing the space occupied inside the valve cavity. The size of this in-situ topography measurement system can be reduced and the control can be made simpler. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1 is a top view of the valve seat structure;
[0036] Figure 2 is a schematic diagram of the cross-sectional structure of the valve seat;
[0037] Figure 3 is a front view of the fit between the topography measurement system and the valve seat provided in the embodiment of this application;
[0038] Figure 4 is a side view of the fit between the topography measurement system and the valve seat provided in the embodiment of this application;
[0039] Figure 5 is an axial sectional view of the fit between the topography measurement system and the valve seat provided in the embodiment of this application;
[0040] Figure 6 is a radial cross-sectional view of the fit between the topography measurement system and the valve seat provided in the embodiment of this application;
[0041] Figure 7 is a schematic diagram of the assembly structure of the topography measurement system provided in an embodiment of this application;
[0042] Figure 8 is an exploded structural diagram of the topography measurement system provided in an embodiment of this application;
[0043] Figure 9 is a schematic diagram of the scanning area of each measuring component on the sealing surface in the topography measurement system provided in the embodiment of this application;
[0044] Figure 10 is a schematic diagram of an application state of the topography measurement system provided in an embodiment of this application, wherein the support is placed vertically;
[0045] Figure 11 is a schematic diagram of an application state of the topography measurement system provided in an embodiment of this application, wherein the support is placed horizontally;
[0046] Figure 12 is a schematic diagram of an application state of the topography measurement system provided in an embodiment of this application, wherein the support is placed at an angle;
[0047] Figure 13 is a flowchart of the in-situ morphology measurement method provided in an embodiment of this application.
[0048] The markings in the diagram represent the following: 9-valve seat, 90-valve cavity, 91-opening, 92-sealing surface, 93-second guide part, 930-reference position, 94-flange, 940-flange face, 941-threaded hole; 100-in-situ topography measurement system; 3-support assembly, 31-mounting part, 310-fitting hole, 32-reinforcement part, 33-bracket, 331-side ear, 34-handle; 4-moving module, 41-drive assembly, 411-power component, 412-lead screw, 42-first guide part, 420-accommodating groove, 4225-slide rail, 4226-slider, 43-slider; 5-first ranging module, 50-scanning area, 51-first distance sensor; 6-second ranging module, 61-second distance sensor; 7-third ranging module; X-first direction, Y-second direction, Z-third direction. Embodiments of the present invention
[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0050] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly fixed to or set on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent. The terms "first" and "second" are used only for the purpose of description and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly specified.
[0051] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.
[0052] A gate valve includes a valve seat 9 and a valve disc (not shown). A gate valve is used to connect two pipes (not shown) to either shut off or allow fluid flow between the two pipes.
[0053] As shown in Figures 1 and 2, the valve seat 9 has a valve cavity 90 that communicates with the fluid flow direction, and the valve seat 9 has an opening 91 that communicates with the valve cavity 90. The inner wall of the valve seat 9 has two sealing surfaces 92, which are generally arranged in a V-shape (see Figure 5), or in other words, generally mirror-symmetrically arranged (the plane of symmetry is perpendicular to the fluid flow direction). The sealing surfaces 92 surround the valve cavity 90. The valve disc has two surfaces that respectively mate with the sealing surfaces 92. When the surface of the valve disc is tightly fitted with the sealing surface 92, the valve cavity 90 is closed, and the fluid is blocked. When the surface of the valve disc leaves the sealing surface 92, the valve cavity 90 is open, allowing fluid to pass through.
[0054] Therefore, the in-situ morphology of the sealing surface 92 (including spatial position, surface wear, roughness, surface tilt angle, etc.) determines the sealing performance between the valve seat 9 and the valve disc.
[0055] The purpose of this application is to provide an in-situ topography measurement system 100 for the sealing surface 92 of a valve seat 9.
[0056] For ease of description and understanding, in the accompanying drawings of the embodiments of this application, the valve cavity 90 of the valve seat 9 is connected along the first direction X, that is, the valve seat 9 is used to connect two pipes arranged along the first direction X. The opening 91 of the valve seat 9 is opened along the second direction Y. The second direction Y is inclined to the first direction X, and may even be perpendicular to the first direction X.
[0057] As shown in Figures 3, 5, and 6, the in-situ topography measurement system 100 includes a support assembly 3 and a first ranging module 5. The support assembly 3 is fixedly connected to the valve seat 9, and at least a portion of the support assembly 3 is disposed within the valve cavity 90, specifically through the opening 91 of the valve seat 9. The first ranging module 5 includes a plurality of first distance sensors 51, which are respectively disposed on the support assembly 3 and located within the valve cavity 90. Each first distance sensor 51 is used to perform a spatial scan of a portion of the sealing surface 92. That is, the first distance sensor 51 is used to measure the distance between the support assembly 3 (where the first distance sensor 51 is located) and a portion of the sealing surface 92. The scanning areas 50 of adjacent first distance sensors 51 (see Figure 9, where the sealing surface 92 is shown as a solid circle and the scanning area 50 is shown as a dashed box) partially overlap to fully cover the sealing surface 92.
[0058] Referring to Figure 9, the sealing surface 92 is annular. For a sealing surface 92, the scanning area 50 of each first distance sensor 51 corresponds to a part of the sealing surface 92. The scanning areas 50 of multiple first distance sensors 51 are generally arranged in annular shape, and the scanning areas 50 of two adjacent first distance sensors 51 overlap with each other. Thus, the scanning areas 50 of multiple first distance sensors 51 can cover the entire sealing surface 92.
[0059] The information that can be determined by spatial scanning of the sealing surface 92 includes at least the spatial position of the sealing surface 92 (its position within the valve cavity 90), the spatial dimensions of the sealing surface 92, and the surface parameters of the sealing surface 92 (such as roughness, whether there are protrusions, pits, deformations, etc.).
[0060] The in-situ topography measurement system 100 provided in this application embodiment places multiple first distance sensors 51 within the valve cavity 90 of the valve seat 9 via a support component 3. Each first distance sensor 51 is used to perform spatial scanning of a portion of the sealing surface 92. The overall topography of the sealing surface 92 is obtained by splicing and merging the scanning results of multiple first distance sensors 51. It is not necessary to scan the entire sealing surface 92 by moving the first distance measuring module 5 within the valve cavity 90, which reduces the number of moving control mechanical components and the space occupied within the valve cavity 90. The size of the in-situ topography measurement system 100 can be reduced and the control can be made simpler.
[0061] The in-situ topography measurement system 100 also includes a processor (not shown), which is communicatively connected to each of the first distance sensors 51, for example, via a wired or wireless communication connection. The processor is used to receive scan information from the first distance sensors 51, which is defined herein as first scan information. The processor is also used to perform splicing calculations on the first scan information to obtain the overall topography of the sealing surface 92.
[0062] In practical applications, the processor can be located away from the support component 3 and the first ranging module 5.
[0063] In the first ranging module 5, the number of first distance sensors 51 is unlimited, but it is advisable to ensure that they can cover the entire sealing surface 92 and reduce the difficulty of splicing calculations.
[0064] Referring to Figures 4 and 5, the first ranging module 5 is located between two sealing surfaces 92. Depending on the type of the first distance sensor 51, the arrangement of the multiple first distance sensors 51 in the first ranging module 5 varies.
[0065] For example, the first distance sensor 51 can be a unidirectional distance sensor. Multiple first distance sensors 51 in the first distance module 5 are set along the first direction X toward one of the sealing surfaces 92 and are used to measure the morphology of different areas of the sealing surface 92. Multiple other first distance sensors 51 in the first distance module 5 are set along the first direction X toward another sealing surface 92 and are used to measure the morphology of different areas of the other sealing surface 92.
[0066] For example, the first distance sensor 51 can be a bidirectional distance sensor. All the first distance sensors 51 in the first distance measuring module 5 can simultaneously measure distances to both sides in the first direction X, so as to measure the morphology of different areas of the two sealing surfaces 92. The purpose of this arrangement is to reduce the number of first distance sensors 51, thereby reducing the size of the first distance measuring module 5, and making it easier to use in the limited space of the valve cavity 90. At the same time, when each first distance sensor 51 measures the distance to the two sealing surfaces 92, the distance measuring origin (the fixed point inside the first distance sensor 51) can coincide or maintain a fixed distance, which helps to improve the accuracy of distance measurement and the accuracy of the morphology of the sealing surfaces 92.
[0067] Please refer to Figures 4, 6, and 7. The first ranging module 5 includes four first distance sensors 51, which are bidirectional ranging sensors. The four first distance sensors 51 are generally rectangularly distributed and are used to measure a portion of the sealing surface 92. For example, assuming the second direction Y is vertical and the opening 91 is located on the upper side of the valve seat 9, and the first direction X is left-right, then the four first distance sensors 51 can be used to measure the upper, lower, left, and right areas of the sealing surface 92, respectively.
[0068] Please refer to Figures 5, 6, 7 and 8. In one embodiment, the support assembly 3 includes a mounting part 31 and a bracket 33. The mounting part 31 is fixedly disposed on the outer surface of the valve seat 9, that is, the mounting part 31 does not need to enter the opening 91 and the valve cavity 90. The bracket 33 is connected to the mounting part 31, and at least a portion of the bracket 33 is located in the valve cavity 90 via the opening 91.
[0069] The purpose of this design is that the mounting part 31 can be designed to fit the shape of the outer surface of the valve seat 9, so as to have a larger connection area with the valve seat 9, making the connection between the mounting part 31 and the valve seat 9 more stable. The bracket 33 can be set as a thin strip to be able to smoothly enter the valve cavity 90 and the opening 91. In addition, the outer dimension of the bracket 33 can be designed to be smaller than the inner dimension of the opening 91, so as to reserve some observation space in the opening 91, so that the operator can observe the position and status of the bracket 33 and the first ranging module 5 in the valve cavity 90 through the opening 91.
[0070] Each first distance sensor 51 is fixedly mounted on the bracket 33 so that it enters the valve cavity 90 along with the bracket 33.
[0071] As shown in Figures 1, 2, and 3, the portion of the valve seat 9 surrounding the opening 91 is a flange 94, which has a flange face 940. The flange face 940 has multiple threaded holes 941, which can be fixed in the installation position using bolts or other fasteners, thereby fixing the valve seat 9 as a whole in the installation position.
[0072] To securely mount the aforementioned mounting portion 31 onto the valve seat 9, please refer to Figures 6, 7, and 8. The mounting portion 31 is annular and is used for fixed connection with the flange face 940 surrounding the opening 91. Specifically, as shown in Figures 6, 7, and 8, the mounting portion 31 has multiple mating holes 310. Fasteners such as bolts pass through the mating holes 310 and engage with the threaded holes 941, thereby securing the mounting portion 31 onto the flange face 940 of the flange 94.
[0073] Of course, in other alternative embodiments, the mounting part 31 can be detachably mounted on the flange 94 in other ways.
[0074] Referring to Figures 5, 6, 7, and 8, in one embodiment, the in-situ topography measurement system 100 further includes a moving module 4, which is mounted on the mounting portion 31. A bracket 33 is connected to the moving module 4. The moving module 4 drives the bracket 33 to move within the valve cavity 90 via the opening 91 until it reaches a predetermined position, after which it performs a spatial scan of the sealing surface 92. The predetermined position can be one or more.
[0075] The purpose of this configuration is twofold: firstly, the positions of the bracket 33 and the first ranging module 5 within the valve cavity 90 are adjustable, allowing the in-situ topography measurement system 100 to be applicable to different models of valve seats 9 and their sealing surfaces 92, ensuring that the scanning area 50 of each first distance sensor 51 can cover the sealing surface 92; secondly, during use, the positions of the bracket 33 and the first ranging module 5 can be finely adjusted to obtain multiple sets of first scanning information, enabling multiple calibration calculations of the topography of the sealing surface 92, which helps to improve the accuracy of the calculations.
[0076] In one embodiment, the moving module 4 is a linear moving module, which drives the bracket 33 to move along a straight line through the opening 91. For example, the moving module 4 can drive the bracket 33 to move generally along the second direction Y, or even move along the second direction Y. The purpose of this arrangement is that during the movement of the bracket 33, the bracket 33 and the first ranging module 5 are always kept between the two sealing surfaces 92, and no collision with the sealing surfaces 92 will occur.
[0077] Please refer to Figures 5, 6, 7 and 8. In one embodiment, the linear motion module includes a drive assembly 41, a first guide portion 42 and a slider 43. The first guide portion 42 is fixedly connected to the inner surface of the mounting portion 31 and at least a portion of it enters the valve chamber 90 through the opening 91. The slider 43 is slidably mounted on the first guide portion 42. The drive assembly 41 is fixed to the first guide portion 42, and the output end of the drive assembly 41 is connected to the slider 43 to drive the slider 43 to slide along the first guide portion 42. The slider 43 is fixedly connected to one end of the bracket 33.
[0078] The form of the drive assembly 41 is not limited; any scheme capable of driving the slider 43 along a straight line can be applied. For example, as shown in Figures 5 to 8, the drive assembly 41 includes a power component 411 and a lead screw 412. The power component 411 is fixedly mounted on the end of the first guide portion 42 located outside the valve seat 9. The lead screw 412 is coaxially connected to the output shaft of the power component 411. The slider 43 engages with the lead screw 412, and the slider 43 can specifically be a nut. The output shaft of the power component 411 outputs torque, driving the lead screw 412 to rotate. Therefore, the slider 43 can translate along the axial direction of the lead screw 412, thus realizing the conversion of driving the slider 43 to move linearly by the rotation of the power component 411. The axial direction of the lead screw 412 can be parallel to the second direction Y.
[0079] The power component 411 may be, for example, an electric motor, optionally a precision motor, to control the rotation angle of the lead screw 412 as precisely as possible.
[0080] Optionally, as shown in Figures 7 and 8, the first guide portion 42 is provided with a receiving groove 420, and support holes (not shown) are formed at both ends of the receiving groove 420 along the second direction Y. The two ends of the lead screw 412 are rotatably located within the support holes. The purpose of this arrangement is twofold: firstly, it can provide rotatable support for the two ends of the lead screw 412, ensuring the position and rotational stability of the lead screw 412; secondly, the lead screw 412 is relatively hidden within the receiving groove 420 of the first guide portion 42, which can prevent the lead screw 412 from colliding with other components when rotating.
[0081] Optionally, referring to Figure 8, the outer surface of the first guide portion 42 is further provided with a slide rail 4225 and a slider 4226 on opposite sides of the receiving groove 420, which are slidably engaged along the axial direction of the lead screw 412. The ends of the bracket 33 are provided with side ears 331 fixedly connected to the slider 4226. The slider 4226 drives the bracket 33 to slide along the slide rail 4225. The connection between the slide rail 4225, the slider 4226, and the side ears 331 restricts the rotation of the bracket 33, ensuring that the bracket 33 always moves along the axial direction of the lead screw 412.
[0082] In other alternative embodiments, the slide rail 4225 and the slider 4226 may be provided only on one side of the receiving groove 420, and the end of the bracket 33 may be provided with a side ear 331 corresponding to the slide rail 4225. Of course, if permitted, a greater number of slide rails 4225 and side ears 331 are also possible.
[0083] As shown in Figures 3, 4, and 5, in one embodiment, the support component 3 further includes a reinforcing part 32, which is fixedly connected to the mounting part 31 and extends in a direction away from the first ranging module 5. The purpose of this arrangement is that, in the second direction Y, the reinforcing part 32 has a certain length, thus providing a certain area for connection with the second guide part 93. This ensures the stability of the second guide part 93 during installation, thereby ensuring that the bracket 33 can move stably along the second direction Y, avoiding the problem of the second guide part 93 and the bracket 33 wobbling, which would affect the spatial scanning results and topography calculation results.
[0084] The shape of the reinforcing part 32 is not limited. For example, as shown in Figures 7 and 8, the reinforcing part 32 can be generally three-sided enclosed and disposed around the second guide part 93. The three-sided enclosed reinforcing part 32 has the advantage of triangular stability, which is conducive to providing stable and effective support for the second guide part 93.
[0085] The reinforcing part 32 and the mounting part 31 can be two separate structures that are manufactured separately but connected together. For example, both the reinforcing part 32 and the mounting part 31 are metal parts that are welded together.
[0086] Furthermore, as shown in Figures 7 and 8, a handle 34 is provided on the side of the mounting part 31 facing away from the valve seat 9. The handle 34 is used by the operator to lift the mounting part 31 together with the reinforcing part 32, so that the in-situ topography measurement system 100 is detached from the valve seat 9 as a whole. The form of the handle 34 is not limited.
[0087] Then, referring to Figures 5, 6, 7, and 8, in one embodiment, the in-situ topography measurement system 100 further includes a second ranging module 6. The second ranging module 6 includes at least one second distance sensor 61, which is disposed on the support assembly 3 and fixed relative to the first distance sensor 51. The second distance sensor 61 is used to perform a spatial scan of the reference position 930 (see Figure 2) within the valve seat 9. For example, the second distance sensor 61 is used to measure the distance between the support assembly 3 (where the second distance sensor 61 is located) and the reference position 930 within the valve seat 9. This scan information is the second scan information. The second distance sensor 61 is communicatively connected to the processor to transmit the second scan information to the processor.
[0088] The information that can be determined by spatial scanning of reference position 930 includes at least the spatial position of reference position 930 (its position within valve cavity 90), the spatial dimensions of reference position 930, and the surface parameters of reference position 930 (such as roughness, whether there are protrusions, pits, deformations, etc.).
[0089] If the second distance sensor 61 is disposed on the support assembly 3 and fixed relative to the first distance sensor 51, then the second distance sensor 61 can be fixedly disposed on the bracket 33.
[0090] The reference position 930 is spatially scanned by the second distance sensor 61. The processor can obtain the morphology of the reference position 930 through the second scan information. The surface morphology of the reference position 930 includes surface wear, roughness, surface tilt angle, etc.
[0091] The purpose of this arrangement is that, since the first ranging module 5 is mounted on the bracket 33, and the bracket 33 has a certain length in the second direction Y, in some cases, when the bracket 33 is not placed vertically, the weight of the first ranging module 5 may cause the bracket 33 to bend and deform along the first direction X and / or the third direction Z. In this case, the scanning data of the topography of the two sealing surfaces 92 by the first ranging module 5 may be affected. Based on the scanning of the topography of the reference position 930 by the second ranging module 6, it can be determined whether the bracket 33 has undergone bending deformation, and the specific direction and value of the bending deformation. The processor uses this specific value of the bending deformation as a compensation value to compensate and correct the first scanning information when calculating the topography of the sealing surface 92.
[0092] Specifically, as shown in Figure 10, the valve seat 9 is installed horizontally. The support assembly 3 and its bracket 33 are placed vertically or nearly vertically, in which case the bracket 33 does not bend or the bending amount is negligible. The first ranging module 5 performs a spatial scan of the sealing surfaces 92 on both sides. The processor can obtain the morphology of the sealing surfaces 92.
[0093] Please refer to Figure 11. The valve seat 9 is installed vertically. The support assembly 3 and its bracket 33 are placed horizontally or nearly horizontally. In this case, the end of the bracket 33 furthest from the mounting part 31, that is, the end where the first ranging module 5 is located, is subjected to gravity and moves downwards, causing the bracket 33 to bend as a whole (including bending along the first direction X and / or bending along the third direction Z). At this time, the second ranging module 6 also deflects downwards along with the bending of the bracket 33. Due to the change in the position of the second ranging module 6, the second scan information measured by the second ranging module 6 changes. The processor corrects and compensates for the first scan information based on the measured second scan information to obtain the morphology of the sealing surface 92.
[0094] Please refer to Figure 12. The valve seat 9 is installed at an angle. The support assembly 3 and its bracket 33 are placed at an angle, and the end of the bracket 33 furthest from the mounting part 31, that is, the end where the first ranging module 5 is located, is deflected by gravity. Similarly, at this time, the second ranging module 6 also deflects with the bending of the bracket 33 (including deflection along the first direction X and / or deflection along the third direction Z). Due to the change in the position of the second ranging module 6, the second scan information measured by the second ranging module 6 changes. The processor compensates for the first scan information based on the measured second scan information to obtain the morphology of the sealing surface 92.
[0095] In addition, the second distance sensor 61 can scan the surface of the reference position 930 and can also compensate for the deviation of the first scan information caused by the motion error of the aforementioned moving module 4 during the operation process and environmental vibration.
[0096] Referring to Figures 5 and 6, the first distance sensor 51 is used to scan the sealing surface 92. Therefore, the position of the first distance sensor 51 should correspond as closely as possible to the lowest and highest positions of the sealing surface 92. Based on this, the second distance measuring module 6 can be disposed on the side of the first distance measuring module 5 facing the mounting portion 31. In this way, the operation of the second distance measuring module 6 and the first distance measuring module 5 will not interfere with each other.
[0097] Regarding the reference position 930 within the valve seat 9, it can be a portion of the inner wall of the valve seat 9 excluding the sealing surface 92. This reference position 930 is a relatively stable portion of the inner wall of the valve seat 9. Specifically, as shown in Figures 1 and 2, the inner wall of the valve seat 9 is provided with at least one second guide portion 93, which is used to slide in connection with a guide groove (not shown) on the valve disc, so that the valve disc moves along the second guide portion 93 to form a sealing connection with the sealing surface 92.
[0098] In one embodiment of this application, the surface of the second guide portion 93 is used as a reference position 930, as shown in FIG2. This is because the extension direction of the second guide portion 93 is perpendicular to the first direction X, that is, the valve disc assembly / disassembly direction, and the second guide portion 93 is located at the center position between the two sealing surfaces 92. Therefore, using the surface of the second guide portion 93 as a reference position 930 can more accurately reflect the deformation of the bracket 33.
[0099] Specifically, as shown in Figures 1 and 2, the inner wall of the valve seat 9 is provided with two second guide portions 93 distributed along a third direction Z, and the second distance sensor 61 is located between the two second guide portions 93. The third direction Z is perpendicular to the first direction X and the second direction Y.
[0100] The number of second distance sensors 61 can be one or more. For example, there may be one second distance sensor 61, which is a bidirectional distance sensor used to simultaneously scan the reference positions 930 on both sides. Alternatively, as shown in Figures 6 to 8, there may be two second distance sensors 61, which are distributed along the third direction Z and are used to scan one reference position 930.
[0101] In other embodiments, there may be other numbers of second distance sensors 61 and other numbers of second guide portions 93, which will not be described in detail here.
[0102] Referring to Figures 5, 6, 7, and 8, in one embodiment, the in-situ topography measurement system 100 further includes a third ranging module 7. The third ranging module 7 is disposed on the side of the bracket 33 opposite to the mounting portion 31 and is used to perform spatial scanning of the inner bottom wall of the valve cavity 90 along the second direction Y. For example, when the bracket 33 and the first ranging module 5 and the second ranging module 6 enter the valve cavity 90 from the opening 91 along the second direction Y, the third ranging module 7 can detect whether there are obstacles in the second direction Y and whether they are close to the inner bottom wall of the valve cavity 90. After the bracket 33 moves into place, the third ranging module 7 is also used to measure the distance between the bracket 33 and the inner bottom wall of the valve seat 9 at this time, as a reference value for subsequent in-situ topography measurement of the sealing surface 92. The third ranging module 7 may include one or more third distance sensors.
[0103] In this embodiment, the measurement accuracy of the first distance sensor 51, the second distance sensor 61, and the third distance sensor is determined by their respective sensor types. To ensure the accuracy of the topographic measurement of the reference position 930 and the sealing surface 92, the lower the measurement accuracy of the first distance sensor 51, the second distance sensor 61, and the third distance sensor, the better. For example, in some cases, the measurement accuracy of the first distance sensor 51, the second distance sensor 61, and the third distance sensor can be less than or equal to 5 micrometers.
[0104] The processor calculates and fits the morphology of the sealing surface 92 based on the measurement results of the first distance sensor 51, the second distance sensor 61, and the third distance sensor. In some cases, the accuracy of the calculated roughness and defect height of the sealing surface 92 can be less than or equal to 5 micrometers, and the deviation of the calculated tilt angle of the sealing surface 92 can be less than or equal to 0.005 degrees.
[0105] The specific form of the bracket 33 is not limited, as long as it can hold the first distance sensor 51, the second distance sensor 61, and the third distance sensor in multiple positions that fit the sealing surface 92. The key surfaces on the bracket 33 where the first distance sensor 51, the second distance sensor 61, and the third distance sensor are mounted are all made with low roughness by means of, for example, precision milling and precision grinding, to ensure the mounting accuracy of the first distance sensor 51, the second distance sensor 61, and the third distance sensor.
[0106] As shown in Figure 8, the size of the area on the bracket 33 for mounting the second distance sensor 61 is larger than the size of the area for mounting the first distance sensor 51. This is because the area for mounting the first distance sensor 51 is closer to the inner bottom wall of the valve cavity 90 of the valve seat 9. In order to avoid the first distance sensor 51 colliding with the close ends of the sealing surface 92, the size of the first ranging module 5 along the first direction X should be as small as possible.
[0107] Furthermore, as shown in Figures 7 and 8, the area on the bracket 33 for mounting the second distance sensor 61 can be designed as a frame to protect the second distance sensor 61 within the frame. Of course, this is not a limitation; the bracket 33 can have other shapes to accommodate the first distance sensor 51, the second distance sensor 61, and the third distance sensor.
[0108] In an optional embodiment, the in-situ topography measurement system 100 further includes multiple shielding shells (not shown). The shielding shells are respectively disposed outside the first distance sensor 51, the second distance sensor 61, and the third distance sensor, and are positioned to avoid the laser exit and laser receiver. The shielding shells are used to shield the measurement results of the first distance sensor 51, the second distance sensor 61, and the third distance sensor from the influence of any residual radiation that may remain within the valve seat 9. Furthermore, the shielding shells may also cover the wiring (not shown) connected to the first distance sensor 51, the second distance sensor 61, and the third distance sensor.
[0109] The specific material of the shielding shell is not limited. For example, the material of the shielding shell may include boron carbide. The specific material of the shielding shell can be selected to have strong radiation protection capabilities, so that the shielding shell has a smaller thickness, and thus, the in-situ topography measurement system 100 has a smaller volume and weight.
[0110] The in-situ topography measurement system 100 provided in this application embodiment has the following advantages:
[0111] 1. Each first distance sensor 51 performs a spatial scan of a portion of the sealing surface 92. The shape of the sealing surface 92 is obtained by splicing the scan results of multiple first distance sensors 51. There is no need to introduce a complex mechanical motion transmission system in the valve cavity 90.
[0112] 2. The moving module 4 uses a linear drive to adjust the position of the bracket 33 and the first ranging module 5 within the valve cavity 90, which enables the in-situ topography measurement system 100 to adjust and adapt to the valve seat 9 and the sealing surface 92. The driving method is relatively simple and the mechanical structure is also relatively simple.
[0113] 3. The second ranging module 6 performs spatial scanning on the reference position 930 on the inner wall of the valve seat 9. It can compensate for the deviation of the scanning result of the first ranging module 5 caused by the deformation of the bracket 33 due to gravity, and compensate for the scanning deviation caused by the jumping and vibration generated during the movement of the moving module 4 driving the bracket 33 to move, so as to ensure the accuracy of the scanning result. It also realizes the automatic compensation function for measuring different installation postures of the valve seat 9.
[0114] 4. The third ranging module 7 performs distance detection on the moving path of the bracket 33, which can prevent the bracket 33 from colliding with obstacles on its moving path, and can also prevent the bracket 33 from moving to the inner bottom wall of the valve seat 9 and causing collision problems. Furthermore, the distance between the bracket 33 and the inner bottom wall of the valve seat 9 measured can be used as a reference for subsequent measurements.
[0115] 5. The use of a shielding shell to protect and shield the first distance sensor 51, the second distance sensor 61 and the third distance sensor can reduce the influence of radiation inside the valve seat 9 on the measurement results. This in-situ topography measurement system 100 is applicable to various types of radiation environments.
[0116] As shown in Figure 13, this application embodiment also provides an in-situ morphology measurement method for the sealing surface 92 of the valve seat 9, specifically including:
[0117] The first ranging module 5 performs a spatial scan on the sealing surface 92 of the valve seat 9 to obtain the first scan information;
[0118] Based on the first scan information, the spatial position information, spatial size information, and surface parameters of the sealing surface 92 are calculated.
[0119] In one embodiment, the in-situ topography measurement method further includes:
[0120] The second ranging module 6 performs a spatial scan of the reference position 930 within the valve cavity 90 of the valve seat 9 to obtain the second scan information;
[0121] Based on the second scan information, the spatial position information, spatial size information, and surface parameters of reference position 930 are calculated; and
[0122] The spatial position information, spatial size information and surface parameters of the sealing surface 92 are calculated based on the second scan information and the first scan information.
[0123] In one embodiment, the in-situ topography measurement method further includes:
[0124] The first ranging module 5 is moved into the valve cavity 90 through the opening 91 of the valve cavity 90 of the valve seat 9, and the third ranging module 7 performs spatial scanning towards the inner bottom wall of the valve cavity 90.
[0125] Specifically, referring to Figure 13, this in-situ morphology measurement method includes:
[0126] Step S1: The reference position 930 is spatially scanned by the second ranging module 6 to obtain the second scanning information; the spatial position information, spatial size information and surface parameters of the reference position 930 are calculated based on the second scanning information.
[0127] Step S2: The sealing surface 92 is spatially scanned by the first ranging module 5 to obtain the first scanning information; the spatial position information, spatial size information and surface parameters of the sealing surface 92 are calculated based on the first scanning information and the spatial position information, spatial size information and surface parameters of the reference position 930.
[0128] In one embodiment, step S0 is included before step S1: a spatial scan is performed by the third ranging module 7 toward the inner bottom wall of the valve cavity 90. This allows confirmation of the distance between the third ranging module 7 and the inner bottom wall of the valve cavity 90, and / or confirmation of whether there are obstacles on the movement path of the first ranging module 5 within the valve cavity 90.
[0129] In one embodiment, step S0 may also be executed at least synchronously with step S2.
[0130] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An in-situ morphology measurement system for valve seat sealing surfaces, characterized in that, include: A support assembly includes a mounting part and a bracket, the mounting part being fixedly disposed on the outer surface of the valve seat, the bracket being connected to the mounting part, and at least a portion of the bracket being located within the valve cavity; The first ranging module includes a plurality of first distance sensors, each of which is fixedly mounted on the bracket. Each first distance sensor is used to maintain a predetermined position within the valve cavity and to perform spatial scanning on a portion of the sealing surface of the valve seat. The scanning areas of adjacent first distance sensors partially overlap to cover the sealing surface. The second ranging module includes at least one second distance sensor, which is disposed on the bracket of the support assembly and fixed relative to the first distance sensor; the second distance sensor is used to perform spatial scanning of a reference position on the inner wall of the valve seat. as well as The processing module is communicatively connected to both the first distance sensor and the second distance sensor. It is used to receive scanning information from the first distance sensor and the second distance sensor, and to compensate the scanning information of the first distance sensor based on the scanning information of the second distance sensor, so as to obtain the morphology of the sealing surface.
2. The in-situ morphology measurement system for valve seat sealing surfaces as described in claim 1, characterized in that, The support assembly further includes a movable module disposed on the mounting portion. The bracket is connected to the movable module, and the movable module is used to drive the bracket to move within the valve cavity through the opening of the valve seat.
3. The in-situ morphology measurement system for valve seat sealing surfaces as described in claim 2, characterized in that, The moving module is a linear moving module, which is used to drive the bracket to move along the opening direction of the opening.
4. The in-situ morphology measurement system for valve seat sealing surfaces as described in claim 3, characterized in that, The in-situ topography measurement system for the valve seat sealing surface further includes a third ranging module, which is located on the side of the bracket away from the mounting part. The third ranging module is used to perform spatial scanning of the inner bottom wall of the valve cavity along the opening direction of the opening.
5. The in-situ morphology measurement system for valve seat sealing surfaces as described in claim 1, characterized in that, The mounting part is annular and is used to be fixedly connected to the flange of the valve seat; the flange has an opening communicating with the valve cavity, and at least a portion of the bracket is located in the valve cavity through the opening.
6. The in-situ topography measurement system for valve seat sealing surfaces as described in any one of claims 1 to 5, characterized in that, The inner wall of the valve seat is provided with at least two opposing second guide portions; the number of second distance sensors is at least two and they are located between the second guide portions, and the second distance sensors are used to perform spatial scanning on the surface of the second guide portions.
7. The in-situ topography measurement system for valve seat sealing surfaces as described in any one of claims 1 to 5, characterized in that, The first distance sensor is a bidirectional distance sensor, and each of the first distance sensors is used to perform spatial scanning of a portion of the sealing surfaces on both sides.
8. A method for measuring the in-situ morphology of a valve seat sealing surface, characterized in that, The in-situ topography measurement system for valve seat sealing surfaces as described in any one of claims 1 to 7 includes: The first ranging module is held at a predetermined position within the valve cavity of the valve seat, and the sealing surface of the valve seat is spatially scanned by the first ranging module to obtain the first scanning information. The second ranging module performs a spatial scan of the reference position within the valve cavity to obtain second scan information. The spatial position information, spatial size information, and surface parameters of the reference position are calculated based on the second scanning information; and The first scan information is compensated based on the second scan information to calculate the spatial position information, spatial size information and surface parameters of the sealing surface.
9. The method for in-situ morphology measurement of valve seat sealing surfaces as described in claim 8, characterized in that, The in-situ topography measurement system for the valve seat sealing surface further includes a third ranging module, which is located on the side of the bracket away from the mounting portion. The third ranging module is used to perform spatial scanning of the inner bottom wall of the valve cavity along the opening direction of the opening. The in-situ topography measurement method further includes: moving the first ranging module into the valve cavity through the opening of the valve cavity of the valve seat, and performing spatial scanning in the direction of the inner bottom wall of the valve cavity of the valve seat through the third ranging module.
10. The in-situ morphology measurement method for valve seat sealing surfaces as described in claim 9, characterized in that, After performing a spatial scan via the third ranging module toward the inner bottom wall of the valve cavity of the valve seat, the method further includes: Confirm the distance between the third ranging module and the inner bottom wall of the valve chamber.
11. The in-situ morphology measurement method for valve seat sealing surfaces as described in claim 9, characterized in that, After performing a spatial scan via the third ranging module toward the inner bottom wall of the valve cavity of the valve seat, the method further includes: Confirm whether there are obstacles on the movement path of the first ranging module.
12. An in-situ morphology measurement device for a valve seat sealing surface, characterized in that, An in-situ topography measurement system for valve seat sealing surfaces as described in any one of claims 1 to 7, comprising: The first control unit is used to hold the first ranging module at a predetermined position within the valve cavity of the valve seat, and to perform spatial scanning of the sealing surface of the valve seat through the first ranging module to obtain first scanning information. The second control unit is used to perform a spatial scan of the reference position in the valve cavity through the second ranging module to obtain second scanning information; The third control unit is configured to calculate the spatial position information, spatial size information, and surface parameters of the reference position based on the second scanning information; and The first scan information is compensated based on the second scan information to calculate the spatial position information, spatial size information and surface parameters of the sealing surface.
13. The in-situ morphology measuring device for valve seat sealing surfaces as described in claim 12, characterized in that, The in-situ topography measurement system for the valve seat sealing surface further includes a third ranging module, which is located on the side of the bracket away from the mounting part. The third ranging module is used to perform spatial scanning of the inner bottom wall of the valve cavity along the opening direction of the opening. The in-situ topography measurement device further includes: The fourth control unit is used to move the first ranging module into the valve cavity through the opening of the valve cavity of the valve seat, and to perform spatial scanning in the direction of the inner bottom wall of the valve cavity of the valve seat through the third ranging module.
14. The in-situ morphology measuring device for valve seat sealing surfaces as described in claim 12, characterized in that, Also includes: The fifth control unit is used to confirm the distance between the third ranging module and the inner bottom wall of the valve chamber.
15. The in-situ morphology measuring device for valve seat sealing surfaces as described in claim 12, characterized in that, Also includes: The sixth control unit is used to confirm whether there are obstacles on the movement path of the first ranging module.