In-situ topography measurement system and method for valve seat sealing surface

Abstract

The present application is applicable to the field of precision detection technology, and provides an in-situ topography measurement system and an in-situ topography measurement method for a valve seat sealing surface. The in-situ topography measurement system for a valve seat sealing surface includes a support assembly and a first ranging module. The support assembly is used to be fixedly connected to the valve seat, and at least a portion of the support assembly is used to be arranged in the valve cavity of the valve seat. The first ranging module includes multiple first distance sensors, which are respectively arranged 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; the overall topography of the sealing surface is obtained by splicing and merging the scanning results of multiple first distance sensors. There is no need to use the first ranging module to move in the valve cavity to scan the entire sealing surface, which can reduce the movement of control mechanical components and reduce the occupation of space in the valve cavity.

Description

Technical Field

[0001] The present application relates to the field of precision detection technology, and in particular to an in-situ topography measurement system and method for a valve seat sealing surface. Background Art

[0002] The valve seat sealing surface is a critical component of any valve, its primary function ensuring the valve's sealing performance. During valve operation, a sealed interface is formed between the valve seat and the valve core, preventing leakage of the media. The quality and machining accuracy of the valve seat sealing surface directly impact the valve's sealing performance. Furthermore, mechanical wear and tear during valve operation, erosion and corrosion from the flow of media, and electrochemical corrosion due to potential differences between the valve seat and disc caused by the concentration difference of the pressure media across the sealing surface can also damage the sealing surface. Defective 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 significance to the normal operation and safety of the valve. In addition to paying attention to the material and processing technology of the valve seat sealing surface when selecting the valve, regular inspection and maintenance of the valve seat sealing surface is also a necessary measure.

[0004] Currently, there are many problems with the measurement of valve seat sealing surfaces, including:

[0005] Measurement space problem: The valve seat cavity is 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 light return and accuracy issues.

[0006] Measurement benchmark issues: A wide measurement coverage area requires a motion system, but the limited space on-site requires a portable and easy-to-use measurement device. Traditional mechanical transmission systems introduce motion errors and cannot adapt to the different installation postures of valves.

[0007] Irradiation problem inside the valve cavity: The electronic components of general photoelectric profile measuring instruments may not function properly due to irradiation problems inside the valve cavity.

[0008] Motion jitter during measurement: Scanning motion or other motion during measurement can cause motion jitter, which can affect measurement accuracy. Especially at high-precision measurement levels, errors caused by motion jitter need to be filtered out. Summary of the Invention

[0009] An object of an embodiment of the present application is to provide an in-situ topography measurement system for a valve seat sealing surface, aiming to solve at least one of the above-mentioned problems.

[0010] The embodiment of the present application is implemented as follows: a system for measuring the in-situ topography of a valve seat sealing surface, comprising:

[0011] a support assembly, configured to be fixedly connected to the valve seat, and at least a portion of the support assembly is configured to be disposed within a valve cavity of the valve seat;

[0012] The first distance measuring module includes a plurality of first distance sensors, which are respectively arranged on the support assembly. Each of the first distance sensors 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 is used to be fixedly arranged on the outer surface of the valve seat, the bracket is connected to the mounting portion, and at least a portion of the bracket is located in the valve cavity; each of the first distance sensors is fixedly arranged on the bracket.

[0014] In one embodiment, the support assembly further includes a moving module, the moving module is disposed on the mounting portion, the bracket is connected to the moving module, and the moving module is used to drive the bracket to move in the valve cavity through the opening of the valve seat.

[0015] In one embodiment, the moving module is a linear moving module, and the moving module 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 also includes a third ranging module, which is arranged on the side of the bracket away from the mounting portion, and 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.

[0017] In one embodiment, the mounting portion is annular and is used to be fixedly connected to the flange of the valve seat; an opening communicating with the valve cavity is provided on the flange, 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 also includes a second ranging module, the second ranging module includes at least one second distance sensor, the second distance sensor is arranged on the support assembly and fixed relative to the first distance sensor; the second distance sensor is used to perform spatial scanning of the 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 opposite second guide portions; the number of the second distance sensors is at least two and they are located between the second guide portions, and the second distance sensors are respectively used to perform spatial scanning on the surfaces of the second guide portions.

[0020] In one embodiment, the in-situ topography 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, and is used to receive scanning information from the first distance sensor and the second distance sensor, and calculate the topography of the sealing surface.

[0021] In one embodiment, the first distance sensor is a bidirectional distance measuring sensor, and each of the first distance sensors is used to perform spatial scanning on a portion of the sealing surface on both sides.

[0022] Another object of the embodiments of the present application is to provide a method for in-situ topography measurement of a valve seat sealing surface, comprising:

[0023] Performing a spatial scan on the sealing surface of the valve seat by using a first distance measuring module to obtain first scanning 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] Performing spatial scanning on a reference position in the valve cavity of the valve seat by a second distance measuring module to obtain second scanning information;

[0027] Calculating the spatial position information, spatial size information and surface parameters of the reference position according to 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 distance measuring module into the valve cavity through the opening of the valve cavity of the valve seat, and performing spatial scanning toward the inner bottom wall of the valve cavity of the valve seat by using a third distance measuring module.

[0030] The in-situ topography measurement system and method for the valve seat sealing surface provided in the embodiments of the present application have the following beneficial effects:

[0031] The in-situ topography measurement system for the valve seat sealing surface provided in the embodiment of the present application places multiple first distance sensors in the valve cavity of the valve seat through a support component, and each first distance sensor is used to perform spatial scanning on a part of the sealing surface. The overall topography of the sealing surface is obtained by splicing and merging the scanning results of the multiple first distance sensors. There is no need to scan the entire sealing surface by moving the first distance measuring module in the valve cavity, and the use of mobile control mechanical components can be eliminated, reducing the space occupied in the valve cavity. The volume of the in-situ topography measurement system can be reduced and the control can be simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the top view of the valve seat;

[0034] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve seat;

[0035] Figure 3 This is a front view of the coordination state of the position and shape measurement system and the valve seat provided in an embodiment of the present application;

[0036] Figure 4 This is a side view of the coordination state of the position and shape measurement system and the valve seat provided in an embodiment of the present application;

[0037] Figure 5 This is an axial cross-sectional view of the coordination state between the position and shape measurement system and the valve seat provided in an embodiment of the present application;

[0038] Figure 6 This is a radial cross-sectional view of the coordination state between the position and shape measurement system and the valve seat provided in an embodiment of the present application;

[0039] Figure 7 Schematic diagram of the assembly structure of the position and shape measurement system provided in an embodiment of the present application;

[0040] Figure 8 Schematic diagram of the decomposition structure of the position and shape measurement system provided in an embodiment of the present application;

[0041] Figure 9 Schematic diagram of the scanning area of ​​each measuring component on the sealing surface in the position and shape measurement system provided in an embodiment of the present application;

[0042] Figure 101 is a schematic diagram of an application state of the position and shape measurement system provided in an embodiment of the present application, wherein the bracket is placed vertically;

[0043] Figure 11 1 is a schematic diagram of an application state of the position and shape measurement system provided in an embodiment of the present application, wherein the bracket is placed horizontally;

[0044] Figure 12 This is a schematic diagram of an application state of the position and shape measurement system provided in an embodiment of the present application, wherein the bracket is placed at an angle;

[0045] Figure 13 This is a flowchart of the steps of the in-situ topography measurement method provided in an embodiment of the present application.

[0046] The meanings of the marks in the figure are:

[0047] 9-valve seat, 90-valve cavity, 91-opening, 92-sealing surface, 93-second guide portion, 930-reference position, 94-flange, 940-flange surface, 941-threaded hole;

[0048] 100-In-situ topography measurement system;

[0049] 3-support assembly, 31-mounting portion, 310-matching hole, 32-reinforcement portion, 33-bracket, 331-side ear portion, 34-handle portion;

[0050] 4-moving module, 41-driving assembly, 411-power member, 412-screw rod, 42-first guide portion, 420-accommodating groove, 4225-slide rail, 4226-sliding block, 43-sliding member;

[0051] 5-first distance measurement module, 50-scanning area, 51-first distance sensor;

[0052] 6-second distance measurement module, 61-second distance sensor;

[0053] 7- third ranging module;

[0054] X-first direction, Y-second direction, Z-third direction. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0056] It should be noted that when a component is referred to as being "fixed on" or "set on" another component, it may be fixed or set on the other component directly or indirectly. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0057] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0058] The gate valve comprises a valve seat 9 and a valve disc (not shown). The gate valve is used to be connected between two pipes (not shown) to cut off the fluid between the two pipes or to allow the fluid to pass through.

[0059] like Figure 1 and Figure 2 As shown, the valve seat 9 is provided with a valve cavity 90 connected along the fluid flow direction, and the valve seat 9 is provided with an opening 91 connected to the valve cavity 90. Two sealing surfaces 92 are provided on the inner wall of the valve seat 9, and the two sealing surfaces 92 are generally arranged in a V shape (please refer to Figure 5 (as shown), or in other words, they are arranged in a generally mirror-symmetrical manner (the plane of symmetry is perpendicular to the direction of fluid flow). Sealing surface 92 surrounds valve cavity 90. The valve disc has two surfaces that mate with sealing surface 92. When the disc surface and sealing surface 92 are in close contact, the valve cavity 90 is sealed, and fluid is blocked. When the disc surface moves away from sealing surface 92, the valve cavity 90 is connected, allowing fluid to pass.

[0060] Therefore, the in-situ morphology of the sealing surface 92 (including spatial position, surface wear, roughness, surface inclination angle, etc.) determines the sealing performance between the valve seat 9 and the valve disc.

[0061] The embodiment of the present application aims to provide an in-situ topography measurement system 100 for the sealing surface 92 of the valve seat 9 .

[0062] For ease of description and understanding, in the drawings of the embodiments of the present application, the valve cavity 90 of the valve seat 9 is connected along a 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 a second direction Y. The second direction Y is inclined with respect to the first direction X, and may even be perpendicular to the first direction X.

[0063] like Figure 3 、 Figure 5 and Figure 6 As shown, the in-situ topography measurement system 100 includes a support assembly 3 and a first distance measuring module 5, wherein the support assembly 3 is used to be fixedly connected to the valve seat 9, and at least a portion of the support assembly 3 is used to be arranged in the valve cavity 90, specifically, it can be arranged in the valve cavity 90 through the opening 91 of the valve seat 9; the first distance measuring module 5 includes a plurality of first distance sensors 51, and the plurality of first distance sensors 51 are respectively arranged on the support assembly 3 and located in the valve cavity 90, each first distance sensor 51 is used to perform spatial scanning on 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 (the position where the first distance sensor 51 is located) and a portion of the sealing surface 92, and the scanning area 50 of adjacent first distance sensors 51 (please refer to Figure 9 As shown, the sealing surface 92 is shown as a solid circle, and the scanning area 50 is shown as a dotted box) partially overlap to fully cover the sealing surface 92.

[0064] Please refer to Figure 9 As shown, the sealing surface 92 is annular. For each sealing surface 92, the scanning area 50 of each first distance sensor 51 corresponds to a portion of the sealing surface 92. The scanning areas 50 of the multiple first distance sensors 51 are generally arranged in an annular shape, and the scanning areas 50 of two adjacent first distance sensors 51 overlap with each other. Therefore, the scanning areas 50 of the multiple first distance sensors 51 can cover the entire sealing surface 92.

[0065] The information that can be determined by spatially scanning the sealing surface 92 includes at least the spatial position of the sealing surface 92 (the position within the valve cavity 90), the spatial size information of the sealing surface 92, and the surface parameters of the sealing surface 92 (such as roughness, whether there are protrusions, pits, deformations, etc.).

[0066] The in-situ morphology measurement system 100 provided in the embodiment of the present application places multiple first distance sensors 51 in the valve cavity 90 of the valve seat 9 through the support component 3, and each first distance sensor 51 is used to perform spatial scanning on a part of the sealing surface 92. The overall morphology of the sealing surface 92 is obtained by splicing and merging the scanning results of the multiple first distance sensors 51. There is no need to scan the entire sealing surface 92 by moving the first distance measuring module 5 in the valve cavity 90, which can reduce the number of mobile control mechanical components and reduce the space occupied in the valve cavity 90. The volume of the in-situ morphology measurement system 100 can be reduced and the control can be simpler.

[0067] The in-situ topography measurement system 100 further includes a processor (not shown) that is communicatively coupled to each first distance sensor 51, for example, via a wired or wireless communication connection. The processor is configured to receive scan information, herein referred to as first scan information, from the first distance sensors 51 and to perform computational splicing on each first scan information to determine the overall topography of the sealing surface 92.

[0068] In practical applications, the processor may be far away from the supporting assembly 3 and the first ranging module 5 .

[0069] In the first distance measuring module 5 , the number of the first distance sensors 51 is not limited, as long as it can cover the entire sealing surface 92 and reduce the difficulty of splicing calculation.

[0070] Please refer to Figure 4 and Figure 5 As shown, the first distance measuring module 5 is located between the two sealing surfaces 92. Depending on the type of the first distance sensors 51, the arrangement of the plurality of first distance sensors 51 in the first distance measuring module 5 is different.

[0071] For example, the first distance sensor 51 can be a unidirectional ranging sensor, and the multiple first distance sensors 51 in the first ranging module 5 are used to be set along the first direction X toward one of the sealing surfaces 92, and to measure the morphology of different areas of the one sealing surface 92. The other multiple first distance sensors 51 in the first ranging module 5 are used to be set along the first direction X toward another sealing surface 92, and to measure the morphology of different areas of the other sealing surface 92.

[0072] For example, the first distance sensor 51 can be a bidirectional distance measuring sensor. All first distance sensors 51 in the first distance measuring module 5 can simultaneously measure distance in both directions in the first direction X, so as to be able to measure the topography 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 volume of the first distance measuring module 5, making it more convenient to use within the limited space of the valve cavity 90. At the same time, when each first distance sensor 51 measures the distance between the two sealing surfaces 92, the distance measurement origin (a fixed point inside the first distance sensor 51) can coincide with or maintain a fixed distance, which is conducive to improving the accuracy of the distance measurement and the accuracy of the topography of the sealing surfaces 92.

[0073] See also Figure 4 、 Figure 6 and Figure 7As shown, the first distance measurement module 5 includes four first distance sensors 51, each of which is a bidirectional distance measurement sensor. The four first distance sensors 51 are arranged in a generally rectangular shape and are each used to measure a portion of the sealing surface 92. For example, assuming that the second direction Y is vertical, the opening 91 is located on the upper side of the valve seat 9, and the first direction X is horizontal, the four first distance sensors 51 can be used to measure the upper, lower, left, and right regions of the sealing surface 92, respectively.

[0074] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the support assembly 3 includes a mounting portion 31 and a bracket 33. The mounting portion 31 is used to be fixedly arranged on the outer surface of the valve seat 9, that is, the mounting portion 31 does not need to enter the opening 91 and the valve cavity 90. The bracket 33 is connected to the mounting portion 31, and at least a portion of the bracket 33 is located in the valve cavity 90 through the opening 91.

[0075] The purpose of this arrangement is that the mounting portion 31 can be designed to adapt to 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 portion 31 and the valve seat 9 more stable. The bracket 33 can be configured as a thin strip so as to be able to smoothly enter the valve cavity 90 and the opening 91. In addition, the outer dimensions of the bracket 33 can be designed to be smaller than the inner dimensions of the opening 91, so as to reserve some observation space in the opening 91, making it easier for the operator to observe the position and situation of the bracket 33 and the first distance measuring module 5 in the valve cavity 90 through the opening 91.

[0076] Each first distance sensor 51 is fixed to the bracket 33 to enter the valve cavity 90 along with the bracket 33 .

[0077] like Figure 1 、 Figure 2 and Figure 3 As shown, the portion of the valve seat 9 surrounding the opening 91 is a flange 94, which has a flange surface 940. The flange surface 940 is provided with a plurality of threaded holes 941, and the flange surface 940 can be fixed to the installation position by fasteners such as bolts, thereby fixing the entire valve seat 9 in the installation position.

[0078] Here, in order to be able to fix the above-mentioned mounting portion 31 on the valve seat 9, please refer to Figure 6 、 Figure 7 and Figure 8 As shown, the mounting portion 31 is annular and is used to be fixedly connected to the flange surface 940 around the opening 91. Figure 6 、 Figure 7 and Figure 8As shown, a plurality of matching holes 310 are provided on the mounting portion 31 , and fasteners such as bolts pass through the matching holes 310 and engage in the threaded holes 941 , so that the mounting portion 31 is fixedly mounted on the flange surface 940 of the flange 94 .

[0079] Of course, in other optional embodiments, the mounting portion 31 may be detachably mounted on the flange 94 in other ways.

[0080] Then, see Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the in-situ topography measurement system 100 further includes a movable module 4, which is disposed on the mounting portion 31 and connected to the bracket 33. The movable module 4 is configured to drive the bracket 33 to move within the valve cavity 90 through the opening 91 until the bracket 33 reaches a predetermined position and then spatially scans the sealing surface 92. The predetermined position may be one or more.

[0081] The purpose of such a setting is that, on the one hand, the positions of the bracket 33 and the first distance measuring module 5 in the valve cavity 90 are adjustable, so that the in-situ morphology measurement system 100 can be applicable to different types of valve seats 9 and their sealing surfaces 92, to ensure that the scanning area 50 of each first distance sensor 51 can cover the sealing surface 92; on the other hand, during use, the positions of the bracket 33 and the first distance measuring module 5 can be fine-tuned to obtain multiple sets of first scanning information, and multiple calibration calculations of the morphology of the sealing surface 92 can be performed, which is conducive to improving the calculation accuracy.

[0082] In one embodiment, the movable module 4 is a linear movable module, configured to drive the bracket 33 to move along a straight line through the opening 91. For example, the movable module 4 can drive the bracket 33 to move generally along the second direction Y, or even along the second direction Y. This arrangement ensures that, during the movement of the bracket 33, the bracket 33 and the first ranging module 5 remain between the two sealing surfaces 92, preventing collision with the sealing surfaces 92.

[0083] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the linear motion module includes a drive component 41, a first guide portion 42 and a sliding member 43. The first guide portion 42 is fixedly connected to the inner surface of the mounting portion 31, and at least a portion enters the valve cavity 90 through the opening 91. The sliding member 43 is slidably mounted on the first guide portion 42. The drive component 41 is fixed to the first guide portion 42, and the output end of the drive component 41 is connected to the sliding member 43 to drive the sliding member 43 to slide along the first guide portion 42. The sliding member 43 is fixedly connected to one end of the bracket 33.

[0084] The form of the driving assembly 41 is not limited, and any solution that can drive the sliding member 43 along a straight line can be applied. For example, see Figures 5 to 8 As shown, the drive assembly 41 includes a power member 411 and a screw 412. The power member 411 is fixedly mounted on the end of the first guide portion 42 located outside the valve seat 9. The screw 412 is coaxially connected to the output shaft of the power member 411. The sliding member 43, which can specifically be a nut, engages with the screw 412. The output shaft of the power member 411 outputs torque, driving the screw 412 to rotate. As a result, the sliding member 43 can perform translational motion along the axial direction of the screw 412. In this way, the rotation of the power member 411 is used to drive the sliding member 43 to move along a straight line. The axial direction of the screw 412 can be parallel to the second direction Y.

[0085] The power member 411 may be, for example, a motor, and may be a precision motor, so as to control the rotation angle of the screw rod 412 as accurately as possible.

[0086] Optionally, see Figure 7 and Figure 8 As shown, the first guide portion 42 is provided with a receiving groove 420. Support holes (not shown) are formed at both ends of the receiving groove 420 along the second direction Y. The ends of the screw rod 412 are rotatably positioned within the support holes. This arrangement is intended to, on the one hand, provide rotational support for both ends of the screw rod 412, ensuring the position and rotational stability of the screw rod 412. On the other hand, the screw rod 412 is relatively hidden within the receiving groove 420 of the first guide portion 42, preventing the screw rod 412 from colliding with other components during rotation.

[0087] Optionally, see Figure 8 As shown, the outer surface of the first guide portion 42 is provided with a slide rail 4225 and a slider 4226 on opposite sides of the accommodating groove 420, respectively, which slide along the axial direction of the screw rod 412. Side ears 331 are fixedly connected to the sliders 4226 at the ends of the bracket 33. The sliders 4226 drive the bracket 33 to slide along the slide rails 4225. The connection between the slide rails 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 screw rod 412.

[0088] In other optional embodiments, the slide rail 4225 and the slider 4226 can be provided on only one side of the accommodating groove 420, and the end of the bracket 33 can be provided with a side ear portion 331 corresponding to the slide rail 4225. Of course, if permitted, a larger number of slide rails 4225 and side ear portions 331 are also possible.

[0089] like Figure 3 、 Figure 4 and Figure 5As shown, in one embodiment, the support assembly 3 further includes a reinforcement portion 32, which is fixedly connected to the mounting portion 31 and extends in a direction away from the first ranging module 5. This configuration is intended to ensure that the reinforcement portion 32 has a certain length in the second direction Y, thereby providing a certain area for connection with the second guide portion 93. This ensures the stability of the installation of the second guide portion 93 and, in turn, ensures that the bracket 33 can move stably along the second direction Y, thereby preventing the second guide portion 93 and the bracket 33 from shaking, which could affect the spatial scanning results and the topography calculation results.

[0090] The shape of the reinforcement portion 32 is not limited. Figure 7 and Figure 8 As shown, the reinforcement portion 32 can be generally three-sided enclosed and arranged around the second guide portion 93. The three-sided enclosed reinforcement portion 32 has the advantage of stability similar to a triangle, which is conducive to providing stable and effective support for the second guide portion 93.

[0091] The reinforcement portion 32 and the mounting portion 31 can be two structures made separately and connected together. For example, the reinforcement portion 32 and the mounting portion 31 are both metal parts and are welded together.

[0092] Also, see Figure 7 and Figure 8 As shown, a handle 34 is provided on the side of the mounting portion 31 facing away from the valve seat 9. The handle 34 is used by an operator to lift the mounting portion 31 together with the reinforcement portion 32 to separate the entire in-situ topography measurement system 100 from the valve seat 9. The form of the handle 34 is not limited.

[0093] Then, see Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the in-situ topography measurement system 100 further includes a second distance measurement module 6, which includes at least one second distance sensor 61. The second distance sensor 61 is disposed on the support assembly 3 and fixed relative to the first distance sensor 51; the second distance sensor 61 is used to measure the reference position 930 in the valve seat 9 (please refer to Figure 2 (as shown) performs spatial scanning. For example, second distance sensor 61 is used to measure the distance between support assembly 3 (where second distance sensor 61 is located) and reference position 930 within valve seat 9. This scanning information is second scanning information. Second distance sensor 61 is communicatively connected to the processor to transmit the second scanning information to the processor.

[0094] The information that can be determined by spatially scanning the reference position 930 includes at least the spatial position of the reference position 930 (the position within the valve cavity 90), the spatial size information of the reference position 930, and the surface parameters of the reference position 930 (such as roughness, whether there are protrusions, pits, deformations, etc.).

[0095] The second distance sensor 61 is disposed on the supporting assembly 3 and is fixed relative to the first distance sensor 51 . The second distance sensor 61 can then be fixedly disposed on the bracket 33 .

[0096] The reference position 930 is spatially scanned by the second distance sensor 61 , and the processor can obtain the morphology of the reference position 930 through the second scanning information. The surface morphology of the reference position 930 includes surface wear, roughness, surface tilt angle, etc.

[0097] The purpose of this arrangement is that, since the first ranging module 5 is disposed on the bracket 33, the bracket 33 has a certain length in the second direction Y. Therefore, in some cases, when the bracket 33 is not vertically positioned, the influence of gravity on 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 is possible to determine whether the bracket 33 has been bent and deformed, as well as the specific direction and value of the bending deformation. The processor uses the 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.

[0098] Specifically, see Figure 10 As shown, the valve seat 9 is installed horizontally. The support assembly 3 and its bracket 33 are positioned vertically or nearly vertically. In this 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 surface 92 on both sides. The processor can obtain the topography of the sealing surface 92.

[0099] See also Figure 11 As shown, the valve seat 9 is installed vertically. The support assembly 3 and its bracket 33 are placed horizontally or nearly horizontally. At this time, the end of the bracket 33 away from the mounting portion 31, that is, the end where the first ranging module 5 is provided, is acted upon downward by gravity, and the bracket 33 as a whole is bent (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 downward as the bracket 33 bends. Since the position of the second ranging module 6 has changed, the second scanning information measured by the second ranging module 6 has changed. The processor corrects and compensates the first scanning information based on the measured second scanning information to obtain the morphology of the sealing surface 92.

[0100] See also Figure 12 As shown, the valve seat 9 is installed at an angle. The support assembly 3 and its bracket 33 are tilted, and the end of the bracket 33 away from the mounting portion 31, i.e., the end where the first ranging module 5 is mounted, 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 scanning information measured by the second ranging module 6 changes. The processor compensates the first scanning information based on the measured second scanning information to obtain the topography of the sealing surface 92.

[0101] In addition, the second distance sensor 61 can scan the surface of the reference position 930 and compensate for the deviation of the first scanning information caused by the motion error of the moving module 4 during the motion process and the environmental vibration.

[0102] Please refer to Figure 5 and Figure 6 As shown, the first distance sensor 51 is used to scan the sealing surface 92. Therefore, the position of the first distance sensor 51 should correspond to the lowest and highest positions of the sealing surface 92 as much as possible. Based on this, the second distance measuring module 6 can be installed on the side of the first distance measuring module 5 facing the mounting portion 31. This ensures that the second distance measuring module 6 and the first distance measuring module 5 do not affect each other.

[0103] The reference position 930 in the valve seat 9 may be a portion of the surface of the inner wall of the valve seat 9 excluding the sealing surface 92. The reference position 930 is a relatively stable portion of the surface in the valve seat 9. Figure 1 and Figure 2 As shown, at least one second guide portion 93 is provided on the inner wall of the valve seat 9, and the second guide portion 93 is used to be slidably connected to the guide groove (not shown) on the valve disc, so that the valve disc forms a sealed connection with the sealing surface 92 after moving along the second guide portion 93.

[0104] In one embodiment of the present application, the surface of the second guide portion 93 is used as a reference position 930, such as Figure 2 This is because the extension direction of the second guide portion 93 is perpendicular to the first direction X, that is, the direction of assembly and disassembly of the valve disc, and the second guide portion 93 is located at the center between the two sealing surfaces 92. Therefore, using the surface of the second guide portion 93 as the reference position 930 can more accurately reflect the deformation of the bracket 33.

[0105] Specifically, if Figure 1 and Figure 2As shown, the inner wall of the valve seat 9 is provided with two second guide portions 93 distributed along the 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.

[0106] The number of the second distance sensor 61 can be one or more. For example, the number of the second distance sensor 61 is one, and it is a bidirectional distance sensor, which is used to simultaneously perform spatial scanning on the reference positions 930 on both sides. For another example, see Figures 6 to 8 As shown, there are two second distance sensors 61 , and the two second distance sensors 61 are distributed along the third direction Z, and are respectively used to perform spatial scanning on a reference position 930 .

[0107] In other embodiments, there may be other numbers of the second distance sensors 61 and other numbers of the second guide portions 93 , which will not be further detailed.

[0108] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the in-situ topography measurement system 100 further includes a third distance measuring module 7, which is disposed on a side of the bracket 33 facing away from the mounting portion 31 and is configured 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 and second distance measuring modules 5 and 6 enter the valve cavity 90 from the opening 91 along the second direction Y, the third distance measuring module 7 can detect whether there are any obstacles in the second direction Y and whether the bracket 33 is close to the inner bottom wall of the valve cavity 90. After the bracket 33 is moved into position, the third distance measuring module 7 is further configured to measure the distance between the bracket 33 and the inner bottom wall of the valve seat 9 at this time, which serves as a reference value for subsequent in-situ topography measurement of the sealing surface 92. The third distance measuring module 7 may include one or more third distance sensors.

[0109] In the embodiments of the present application, 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 topography measurement of the reference point 930 and the sealing surface 92, the measurement accuracy of the first distance sensor 51, the second distance sensor 61, and the third distance sensor is as low as possible. 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 microns.

[0110] The processor calculates and fits the topography of sealing surface 92 based on the measurement results of first distance sensor 51, second distance sensor 61, and third distance sensor. In some cases, the calculated roughness and defect height of sealing surface 92 can be accurate to less than or equal to 5 microns, and the calculated tilt angle of sealing surface 92 can achieve a deviation of less than or equal to 0.005 degrees.

[0111] The specific form of the bracket 33 is not limited, as long as it can maintain the first distance sensor 51, the second distance sensor 61, and the third distance sensor at multiple positions that are compatible with the sealing surface 92. Key surfaces of the bracket 33 on which the first distance sensor 51, the second distance sensor 61, and the third distance sensor are mounted are all precision-milled and ground to ensure minimal roughness, thereby ensuring accurate installation of the first distance sensor 51, the second distance sensor 61, and the third distance sensor.

[0112] like Figure 8 As shown, 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 end of the sealing surface 92 that is close to each other, the size of the first distance measuring module 5 along the first direction X should be as small as possible.

[0113] In addition, if Figure 7 and Figure 8 As shown, the area on the bracket 33 for mounting the second distance sensor 61 can be designed as a frame shape to protect the second distance sensor 61. Of course, the shape of the bracket 33 is not limited to this, and can have other shapes that are suitable for the first distance sensor 51, the second distance sensor 61, and the third distance sensor.

[0114] In an optional embodiment, the in-situ topography measurement system 100 further includes multiple shielding shells (not shown). These shielding shells are positioned outside the first distance sensor 51, the second distance sensor 61, and the third distance sensor, respectively, avoiding the laser exit and laser receiving ports. The shielding shells are used to shield the measurement results of the first, second, and third distance sensors 51, 61, and 61 from any residual radiation within the valve seat 9. Furthermore, the shielding shells can also be placed over the wiring (not shown) connecting the first, second, and third distance sensors 51, 61, and 61.

[0115] The specific material of the shielding shell is not limited. For example, the shielding shell can be made of boron carbide. The specific material of the shielding shell can be selected from a material with strong radiation protection capabilities to reduce the thickness of the shielding shell, thereby reducing the size and weight of the in-situ topography measurement system 100.

[0116] The in-situ topography measurement system 100 provided in the embodiment of the present application has the following advantages:

[0117] 1. Each first distance sensor 51 performs spatial scanning on a portion of the sealing surface 92 , and the topography of the sealing surface 92 is obtained by splicing the scanning results of multiple first distance sensors 51 , without introducing a complex mechanical motion transmission system into the valve cavity 90 .

[0118] 2. The mobile module 4 uses a linear drive to adjust the position of the bracket 33 together with the first distance measuring module 5 in the valve cavity 90, so that the in-situ topography measurement system 100 can adjust and adapt the valve seat 9 and the sealing surface 92. The driving method is relatively simple, and the mechanical structure is also relatively simple.

[0119] 3. The second ranging module 6 performs spatial scanning of the reference position 930 on the inner wall of the valve seat 9, which 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 beating and vibration generated during the movement of the bracket 33 by the moving module 4, thereby ensuring the accuracy of the scanning result and realizing the automatic compensation function for the measurement of different installation postures of the valve seat 9;

[0120] 4. The third distance measuring module 7 performs distance detection along the moving path of the bracket 33, which can prevent the bracket 33 from colliding with obstacles along its moving path and can also prevent collision problems caused by the bracket 33 moving to the inner bottom wall of the valve seat 9. In addition, the measured distance between the bracket 33 and the inner bottom wall of the valve seat 9 can be used as a reference for subsequent measurements;

[0121] 5. Using 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 impact of radiation in the valve seat 9 on the measurement results. The in-situ profile measurement system 100 is applicable to various types of radiation environments.

[0122] like Figure 13 As shown, the embodiment of the present application also provides an in-situ topography measurement method for the sealing surface 92 of the valve seat 9, which specifically includes:

[0123] The sealing surface 92 of the valve seat 9 is spatially scanned by the first distance measuring module 5 to obtain first scanning information;

[0124] The spatial position information, spatial size information and surface parameters of the sealing surface 92 are calculated based on the first scanning information.

[0125] In one embodiment, the in-situ topography measurement method further includes:

[0126] Performing a spatial scan of the reference position 930 in the valve cavity 90 of the valve seat 9 by the second distance measuring module 6 to obtain second scanning information;

[0127] Calculating spatial position information, spatial size information, and surface parameters of the reference position 930 based on the second scanning information; and

[0128] The spatial position information, spatial size information and surface parameters of the sealing surface 92 are calculated based on the second scanning information and the first scanning information.

[0129] In one embodiment, the in-situ topography measurement method further includes:

[0130] The first distance measuring module 5 is moved into the valve cavity 90 through the opening 91 of the valve cavity 90 of the valve seat 9 , and spatial scanning is performed toward the inner bottom wall of the valve cavity 90 by the third distance measuring module 7 .

[0131] For details, please refer to Figure 13 As shown, the in-situ topography measurement method includes:

[0132] Step S1: performing spatial scanning on the reference position 930 by the second distance measurement module 6 to obtain second scanning information; calculating the spatial position information, spatial size information and surface parameters of the reference position 930 based on the second scanning information;

[0133] Step S2, perform spatial scanning on the sealing surface 92 through the first ranging module 5 to obtain first scanning information; calculate the spatial position information, spatial size information and surface parameters of the sealing surface 92 based on the first scanning information and the spatial position information, spatial size information and surface parameters of the above-mentioned reference position 930.

[0134] In one embodiment, before step S1, step S0 is further included: performing a spatial scan toward the inner bottom wall of the valve chamber 90 by the third distance measuring module 7. This allows the determination of the distance between the third distance measuring module 7 and the inner bottom wall of the valve chamber 90 at that time, and / or the determination of whether there are any obstacles in the movement path of the first distance measuring module 5 within the valve chamber 90.

[0135] In one embodiment, step S0 may be performed at least synchronously with step S2.

[0136] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An in-situ topography measurement system for valve seat sealing surface, characterized in that: include: A support assembly includes a mounting portion and a bracket, wherein the mounting portion is fixedly mounted on an outer surface of the valve seat, the bracket is connected to the mounting portion, and at least a portion of the bracket is located in the valve cavity of the valve seat; a first distance measurement module, comprising a plurality of first distance sensors, each of which is fixedly mounted on the bracket, and each of which is configured to maintain a predetermined position within the valve cavity and spatially scan a portion of the sealing surface of the valve seat, wherein scanning areas of adjacent first distance sensors partially overlap to cover the sealing surface; a second distance measuring module, the second distance measuring module comprising at least one second distance sensor, the second distance sensor being disposed on the bracket of the support assembly and fixed relative to the first distance sensor; the second distance sensor being used to perform spatial scanning of a reference position on the inner wall of the valve seat; as well as A processing module, wherein the processing module is communicatively connected to the first distance sensor and the second distance sensor, and 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 according to the scanning information of the second distance sensor to obtain the morphology of the sealing surface.

2. The in-situ topography measurement system for valve seat sealing surface according to claim 1, characterized in that: The support assembly further includes a moving module, which is disposed on the mounting portion. The bracket is connected to the moving module, and the moving module is used to drive the bracket to move in the valve cavity through the opening of the valve seat.

3. The in-situ topography measurement system for valve seat sealing surface according to claim 2, characterized in that: The moving module is a linear moving module, and the moving module is used to drive the bracket to move along the opening direction of the opening.

4. The in-situ topography measurement system for valve seat sealing surface according to claim 3, characterized in that: The in-situ topography measurement system for the valve seat sealing surface also includes a third ranging module, which is arranged on the side of the bracket away from the mounting portion, and the third ranging module is used to perform spatial scanning on the inner bottom wall of the valve cavity along the opening direction of the opening.

5. The in-situ topography measurement system for valve seat sealing surface according to claim 1, characterized in that: The mounting portion is annular and is used for fixed connection with the flange of the valve seat; an opening communicating with the valve cavity is formed on the flange, and at least a portion of the bracket is located in the valve cavity via the opening.

6. The in-situ topography measurement system for valve seat sealing surface according to any one of claims 1 to 5, characterized in that: The inner wall of the valve seat is provided with at least two opposite second guide parts; the number of the second distance sensors is at least two and they are located between the second guide parts, and the second distance sensors are respectively used to perform spatial scanning on the surface of the second guide parts.

7. The in-situ topography measurement system for valve seat sealing surface according to any one of claims 1 to 5, characterized in that: The first distance sensor is a bidirectional distance measuring sensor, and each of the first distance sensors is used to perform spatial scanning on a portion of the sealing surface on both sides.

8. A method for measuring the in-situ topography of a valve seat sealing surface, characterized in that: An in-situ topography measurement system for a valve seat sealing surface according to any one of claims 1 to 7 is used, comprising: Keeping the first distance measuring module at a predetermined position in the valve cavity of the valve seat, and performing a spatial scan on the sealing surface of the valve seat by the first distance measuring module to obtain first scanning information; Performing a spatial scan on the reference position in the valve cavity by the second ranging module to obtain second scanning information; Calculating the spatial position information, spatial size information and surface parameters of the reference position according to the second scanning information; and The first scanning information is compensated according to the second scanning information to calculate the spatial position information, spatial size information and surface parameters of the sealing surface.

9. The in-situ topography measurement method for a valve seat sealing surface according to claim 8, characterized in that: The in-situ topography measurement system for the valve seat sealing surface also includes a third ranging module, which is arranged on the side of the bracket away from the mounting portion, and 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 of the valve cavity; the in-situ topography measurement method also includes: moving the first ranging module into the valve cavity through the opening, and performing spatial scanning toward the inner bottom wall of the valve cavity of the valve seat through the third ranging module.

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