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

Abstract

The invention is suitable for the technical field of precision detection, and provides an in-situ morphology measurement system and method for a valve seat sealing face, the in-situ morphology measurement system for the valve seat sealing face comprises a supporting assembly and a first distance measurement module, the supporting assembly is used for being fixedly connected with a valve seat, and the first distance measurement module is used for being connected with the valve seat. At least one part of the supporting assembly is used for being arranged in a valve cavity of the valve seat, the first distance measuring module comprises a plurality of first distance sensors, the first distance sensors are arranged on the supporting assembly, and each first distance sensor is used for conducting space scanning on one part of the sealing face of the valve seat. Scanning areas of adjacent first distance sensors are partially overlapped so as to cover the sealing surface; the whole shape of the sealing surface is obtained by splicing and combining the scanning results of the multiple first distance sensors, the mode that the first distance measuring module moves in the valve cavity to scan the whole sealing surface is not needed, mobile control mechanical assemblies can be reduced, and occupied space in the valve cavity is reduced.

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 one of the important parts of the valve, and its main function is to ensure the sealing performance of the valve. When the valve is working, a closed interface will be formed between the valve seat sealing surface and the valve core sealing surface to prevent leakage of the medium. The quality and processing accuracy of the valve seat sealing surface will directly affect the sealing performance of the valve. In addition, the valve will produce mechanical wear during use, erosion and corrosion will occur when the medium moves, and the potential difference between the valve seat and the valve disc due to the concentration difference of the pressure medium on the sealing surface will cause electrochemical corrosion on both sides of the sealing surface. These reasons will also damage the sealing surface. If the sealing surface is defective or unqualified, it will directly lead to leakage of the medium 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] At present, there are many problems with the measurement of valve seat sealing surface, including: 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. The traditional structured light measurement solution cannot meet the requirements due to light return and accuracy issues.

[0005] Measurement benchmark problem: The measurement coverage is large, so a motion system is needed. However, the on-site measurement space is narrow, so the measurement device must be portable and easy to use. Traditional mechanical transmission systems will introduce motion errors and cannot adapt to different installation postures of valves.

[0006] Irradiation problem inside the valve cavity: The electronic components of general photoelectric profile measuring instruments may not work properly due to irradiation problems inside the valve cavity.

[0007] 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

[0008] The purpose of the embodiments 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.

[0009] The embodiment of the present application is implemented as follows: an in-situ topography measurement system for a valve seat sealing surface, comprising: A support assembly, used for fixed connection with the valve seat, and at least a part of the support assembly is used for being arranged in the valve cavity of the valve seat; The first distance measuring module includes a plurality of first distance sensors, which are respectively arranged on the supporting assembly, and each of the first distance sensors is used to perform spatial scanning on a portion of the sealing surface of the valve seat, and the scanning areas of adjacent first distance sensors partially overlap to cover the sealing surface.

[0010] In one embodiment, the support assembly includes a mounting portion and a bracket, the mounting portion is used to be fixedly disposed 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 disposed on the bracket.

[0011] 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.

[0012] 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.

[0013] 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 a 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.

[0014] 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 formed on the flange, and at least a portion of the bracket is located in the valve cavity via the opening.

[0015] 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.

[0016] In one embodiment, 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 surfaces of the second guide parts.

[0017] In one embodiment, the in-situ topography measurement system for the valve seat sealing surface also includes a processing module, which 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 calculate the topography of the sealing surface.

[0018] 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.

[0019] Another object of the embodiment of the present application is to provide an in-situ topography measurement method for a valve seat sealing surface, comprising: Performing a spatial scan on the sealing surface of the valve seat by using a first distance measuring module to obtain first scanning information; The spatial position information, spatial dimension information and surface parameters of the sealing surface are calculated according to the first scanning information.

[0020] In one embodiment, it further includes: Performing a spatial scan on a reference position in the valve cavity of the valve seat by a second distance measuring 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 spatial position information, spatial dimension information and surface parameters of the sealing surface are calculated according to the second scanning information and the first scanning information.

[0021] 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 through a third distance measuring module.

[0022] 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: The in-situ topography measurement system for the sealing surface of a valve seat provided in an embodiment of the present application places a plurality of first distance sensors in the valve cavity of the valve seat through a supporting assembly, and each first distance sensor is used to perform spatial scanning on a portion of the sealing surface. The overall topography of the sealing surface is obtained by splicing and merging the scanning results of the plurality of 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 a mobile control mechanical assembly can be eliminated, thereby 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 easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0024] Figure 1 It is a schematic diagram of the top view structure of the valve seat; Figure 2 It is a schematic diagram of the cross-sectional structure of the valve seat; Figure 3 It is a front view of the matching state of the position and shape measurement system and the valve seat provided in the embodiment of the present application; Figure 4 It is a side view of the matching state of the position and shape measurement system and the valve seat provided in the embodiment of the present application; Figure 5 is an axial cross-sectional view of the matching state of the position and shape measurement system and the valve seat provided in an embodiment of the present application; Figure 6 is a radial cross-sectional view of the matching state of the position and shape measurement system and the valve seat provided in an embodiment of the present application; Figure 7 It is a schematic diagram of the assembly structure of the position and shape measurement system provided in an embodiment of the present application; Figure 8 It is a schematic diagram of the decomposed structure of the position and shape measurement system provided in an embodiment of the present application; Fig. 9 It is a 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; Fig.10 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; Fig.11 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; Fig.12 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; Fig.13 It is a flowchart of the steps of the in-situ morphology measurement method provided in an embodiment of the present application.

[0025] The meanings of the marks in the figure are: 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; 100- In-situ topography measurement system; 3-support assembly, 31-installation part, 310-matching hole, 32-reinforcement part, 33-bracket, 331-side ear part, 34-handle part; 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; 5-first distance measurement module, 50-scanning area, 51-first distance sensor; 6-second distance measurement module, 61-second distance sensor; 7- the third ranging module; X-first direction, Y-second direction, Z-third direction. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly or indirectly fixed or disposed on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of 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.

[0028] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0029] The gate valve comprises a valve seat 9 and a valve flap (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.

[0030] 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 with the valve cavity 90. The inner wall of the valve seat 9 is provided with two sealing surfaces 92, which are generally arranged in a V shape (please refer to Figure 5As shown in FIG. 1 , or in other words, the valve cavity 90 is generally arranged in mirror symmetry (the symmetry plane is perpendicular to the flow direction of the fluid). The sealing surface 92 is arranged around the valve cavity 90. The valve disc is provided with two surfaces respectively adapted to the sealing surface 92. When the surface of the valve disc is closely attached to the sealing surface 92, the valve cavity 90 is closed, and the fluid is cut off at this time. When the surface of the valve disc leaves the sealing surface 92, the valve cavity 90 is connected, allowing the fluid to pass through.

[0031] 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.

[0032] 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 .

[0033] 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 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.

[0034] like Figure 3 , Figure 5 and Figure 6 As shown, the in-situ topography measurement system 100 includes a support component 3 and a first distance measuring module 5, wherein the support component 3 is used to be fixedly connected to the valve seat 9, and at least a portion of the support component 3 is used to be arranged in the valve cavity 90, and specifically can be arranged in the valve cavity 90 via 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 component 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 component 3 (the position of the first distance sensor 51) and a portion of the sealing surface 92, and the scanning area 50 of adjacent first distance sensors 51 (please refer to Fig. 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.

[0035] Please refer to Fig. 9 As shown, the sealing surface 92 is annular. For one sealing surface 92, the scanning area 50 of each first distance sensor 51 corresponds to a portion of the sealing surface 92, and the scanning areas 50 of the plurality of first distance sensors 51 are generally arranged in an annular shape, and the scanning areas 50 of two adjacent first distance sensors 51 overlap each other, so that the scanning areas 50 of the plurality of first distance sensors 51 can cover the entire sealing surface 92.

[0036] 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 in 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, deformation, etc.).

[0037] The in-situ topography 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 topography 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 topography measurement system 100 can be reduced and the control can be simpler.

[0038] The in-situ topography measurement system 100 further includes a processor (not shown), which is connected to each first distance sensor 51 in communication, for example, by wired communication or wireless communication. The processor is used to receive scanning information from the first distance sensor 51, which is defined as first scanning information. The processor is also used to perform splicing calculations on each first scanning information to obtain the overall topography of the sealing surface 92.

[0039] In practical applications, the processor may be far away from the supporting assembly 3 and the first ranging module 5 .

[0040] 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.

[0041] Please refer to Figure 4 and Figure 5 As shown, the first distance measuring module 5 is located between the two sealing surfaces 92. According to different types 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.

[0042] 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, and 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.

[0043] For example, the first distance sensor 51 may be a bidirectional distance measuring sensor, and all the first distance sensors 51 in the first distance measuring module 5 may simultaneously measure distances in both directions in the first direction X, so as to be able to measure the morphologies of different regions of the two sealing surfaces 92. The purpose of such a configuration is to reduce the number of first distance sensors 51, thereby reducing the volume 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 distances of the two sealing surfaces 92, the distance measuring origin (the fixed point inside the first distance sensor 51) may coincide or maintain a fixed distance, which is conducive to improving the accuracy of the distance measurement and the accuracy of the morphology of the sealing surface 92.

[0044] See also Figure 4 , Figure 6 and Figure 7 As shown, the first distance measuring module 5 includes four first distance sensors 51, and the four first distance sensors 51 are bidirectional distance measuring sensors. The four first distance sensors 51 are generally distributed in a rectangular shape and are respectively used to measure a portion of the sealing surface 92. For example, assuming that the second direction Y is a vertical direction, and the opening 91 is set on the upper side of the valve seat 9, and the first direction X is a left-right direction, the four first distance sensors 51 can be used to measure the upper, lower, left, and right areas of the sealing surface 92, respectively.

[0045] 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 via the opening 91.

[0046] The purpose of such a setting is that the mounting portion 31 can be designed to be adapted 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, so that the connection between the mounting portion 31 and the valve seat 9 is more stable, and the bracket 33 can be set to a thin strip shape so as to be able to smoothly enter the valve cavity 90 and the opening 91. In addition, the outer size of the bracket 33 can be designed to be smaller than the inner size of the opening 91, so as to reserve a part of the observation space in the opening 91, so that the operator can 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.

[0047] Each first distance sensor 51 is fixedly disposed on the bracket 33 to enter the valve chamber 90 along with the bracket 33 .

[0048] like Figure 1 , Figure 2 and Figure 3As shown, the portion of the valve seat 9 around the opening 91 is a flange 94, and the flange 94 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 fixedly connected to the installation position by fasteners such as bolts, thereby fixing the valve seat 9 as a whole at the installation position.

[0049] Here, in order to fix the 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 8 As shown, the mounting portion 31 is provided with a plurality of matching holes 310 , 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 .

[0050] Of course, in other optional embodiments, the mounting portion 31 may be detachably mounted on the flange 94 in other ways.

[0051] 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 moving module 4, which is disposed on the mounting portion 31, and the bracket 33 is connected to the moving module 4, and the moving module 4 is used to drive the bracket 33 to move in the valve cavity 90 through the opening 91 until it reaches a predetermined position, and then performs a spatial scan on the sealing surface 92. The predetermined position can be one or more.

[0052] The purpose of such arrangement 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 valve seats 9 and sealing surfaces 92 of different types 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 beneficial to improving the calculation accuracy.

[0053] In one embodiment, the moving module 4 is a linear moving module, and the moving module 4 is used to drive 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 along the second direction Y. The purpose of such a setting is that during the movement of the bracket 33, the bracket 33 and the first distance measuring module 5 are always kept between the two sealing surfaces 92, and no collision with the sealing surfaces 92 occurs.

[0054] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, the linear motion module includes a driving 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 driving component 41 is fixed to the first guide portion 42, and the output end of the driving 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.

[0055] 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. Figures 5 to 8 As shown, the driving assembly 41 includes a power member 411 and a screw rod 412. The power member 411 is fixedly mounted on one end of the first guide portion 42 outside the valve seat 9. The screw rod 412 is coaxially connected to the output shaft of the power member 411. The sliding member 43 is engaged with the screw rod 412. The sliding member 43 can be a nut. The output shaft of the power member 411 outputs torque to drive the screw rod 412 to rotate. Therefore, the sliding member 43 can perform translational motion along the axial direction of the screw rod 412. In this way, the conversion of driving the sliding member 43 to move in a straight line by the rotation of the power member 411 is realized. The axial direction of the screw rod 412 can be parallel to the second direction Y.

[0056] 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.

[0057] Optionally, see Figure 7 and Figure 8 As shown, the first guide portion 42 is provided with a receiving groove 420, and the two ends of the receiving groove 420 along the second direction Y are respectively formed with support holes (not shown), and the two ends of the screw rod 412 are rotatably located in the support holes. The purpose of such a setting is, on the one hand, to be able to provide rotational support for the two ends of the screw rod 412 to ensure the position and rotation stability of the screw rod 412, and on the other hand, the screw rod 412 is relatively hidden in the receiving groove 420 of the first guide portion 42, which can prevent the screw rod 412 from colliding with other components when rotating.

[0058] Optionally, see Figure 8 As shown, a slide rail 4225 and a slider 4226 are respectively provided on the outer surface of the first guide portion 42 at opposite sides of the accommodating groove 420, which slide along the axial direction of the screw rod 412, and side ears 331 are respectively provided on both sides of the end of the bracket 33, which are fixedly connected to the slider 4226. The slider 4226 drives the bracket 33 to slide along the slide rail 4225, and the connection between the slide rail 4225, the slider 4226 and the side ears 331 can limit the rotation of the bracket 33, so that the bracket 33 always moves along the axial direction of the screw rod 412.

[0059] In other optional embodiments, the slide rail 4225 and the slider 4226 may be provided only on one side of the accommodating groove 420, and the end of the bracket 33 may be provided with a side ear portion 331 corresponding to the slide rail 4225. Of course, if permitted, a greater number of slide rails 4225 and side ear portions 331 are also possible.

[0060] like Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the support assembly 3 further includes a reinforcing portion 32, which is fixedly connected to the mounting portion 31 and extends in a direction away from the first ranging module 5. The purpose of such a configuration is that in the second direction Y, the reinforcing portion 32 has a certain length, so as to have a certain area for connecting with the second guide portion 93, so that the stability of the installation of the second guide portion 93 can be ensured, and then, the bracket 33 can be ensured to move stably along the second direction Y, avoiding the problem that the second guide portion 93 shakes, the bracket 33 shakes, and affects the spatial scanning result and the morphology calculation result.

[0061] 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 that of a triangle, which is beneficial for providing stable and effective support for the second guide portion 93.

[0062] The reinforcement part 32 and the mounting part 31 can be two structures made separately and connected together. For example, the reinforcement part 32 and the mounting part 31 are both metal parts and are welded together.

[0063] 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 for an operator to lift the mounting portion 31 together with the reinforcement portion 32 so that the in-situ topography measurement system 100 is completely separated from the valve seat 9. The form of the handle 34 is not limited.

[0064] 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, the second distance measurement module 6 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 For example, the second distance sensor 61 is used to measure the distance between the support assembly 3 (the location of the second distance sensor 61) and the reference position 930 in the valve seat 9, and the scanning information is the second scanning information. The second distance sensor 61 is communicatively connected to the processor to transmit the second scanning information to the processor.

[0065] 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.).

[0066] The second distance sensor 61 is disposed on the supporting assembly 3 and is fixed relative to the first distance sensor 51 , and the second distance sensor 61 can be fixedly disposed on the bracket 33 .

[0067] 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 inclination angle, etc.

[0068] The purpose of such arrangement is that, since the first distance measuring module 5 is arranged 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 placed vertically, the bracket 33 may be bent and deformed along the first direction X and / or the third direction Z due to the influence of the gravity of the first distance measuring module 5, and at this time, the scanning data of the topography of the two sealing surfaces 92 by the first distance measuring module 5 may be affected. Based on the scanning of the topography of the reference position 930 by the second distance measuring module 6, it can be determined whether the bracket 33 is bent and deformed, and the specific direction and value of the bending deformation. The processor uses the specific value of the bending deformation as a compensation value, and compensates and corrects the first scanning information when calculating the topography of the sealing surface 92.

[0069] Specifically, see Fig.10As shown, the valve seat 9 is installed horizontally. The support assembly 3 and its bracket 33 are placed vertically or nearly vertically. At this time, the bracket 33 does not bend or the bending amount can be ignored. The first distance measuring module 5 performs spatial scanning on the sealing surfaces 92 on both sides. The processor can obtain the morphology of the sealing surface 92.

[0070] See also Fig.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 distance measuring module 5 is set, is downwardly acted upon 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 distance measuring module 6 also deflects downward with the bending of the bracket 33. Since the position of the second distance measuring module 6 has changed, the second scanning information measured by the second distance measuring module 6 has changed. The processor corrects and compensates the first scanning information according to the measured second scanning information to obtain the morphology of the sealing surface 92.

[0071] See also Fig.12 As shown, 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 away from the mounting portion 31, that is, the end where the first distance measuring module 5 is set, is deflected by gravity. Similarly, at this time, the second distance measuring 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). Since the position of the second distance measuring module 6 has changed, the second scanning information measured by the second distance measuring module 6 has changed. The processor compensates the first scanning information according to the measured second scanning information to obtain the morphology of the sealing surface 92.

[0072] 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.

[0073] Please refer to Figure 5 and Figure 6 As shown, the first distance sensor 51 is used to scan the sealing surface 92, so the position of the first distance sensor 51 should correspond to the lowest position and the highest position of the sealing surface 92 as much as possible. On this basis, the second distance measuring module 6 can be arranged on the side of the first distance measuring module 5 facing the mounting portion 31. In this way, the second distance measuring module 6 and the first distance measuring module 5 can work independently of each other.

[0074] 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 except the sealing surface 92. The reference position 930 is a relatively stable portion of the surface in the valve seat 9. For details, please refer to 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 a guide groove (not shown) on the valve disc, so that the valve disc moves along the second guide portion 93 to form a sealed connection with the sealing surface 92.

[0075] 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 disassembly direction of the valve flap, 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 a reference position 930 can more accurately reflect the deformation of the bracket 33.

[0076] Specifically, Figure 1 and Figure 2 As 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.

[0077] 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. Figures 6 to 8 As shown, the number of the second distance sensors 61 is two, 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 .

[0078] 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 described with examples.

[0079] 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 the side of the bracket 33 away from the mounting portion 31 and is used to perform spatial scanning on the inner bottom wall of the valve cavity 90 along the second direction Y. For example, when the bracket 33 and the first distance measuring module 5 and the second distance measuring module 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 is an obstacle in the second direction Y and whether it is close to the inner bottom wall of the valve cavity 90. When the bracket 33 is moved into place, the third distance measuring 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 distance measuring module 7 may include one or more third distance sensors.

[0080] In the embodiment 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 the type of sensor itself. In order to ensure the accuracy of the topographic measurement of the reference position 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 small 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.

[0081] The processor calculates and fits the topography of the sealing surface 92 according to 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 microns, and the calculated inclination angle of the sealing surface 92 can achieve a deviation of less than or equal to 0.005 degrees.

[0082] The specific form of the bracket 33 is not limited, as long as the first distance sensor 51, the second distance sensor 61 and the third distance sensor can be maintained at multiple positions adapted to the sealing surface 92. The 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 ensured to have a small roughness by, for example, precision milling and precision grinding, so as to ensure the installation accuracy of the first distance sensor 51, the second distance sensor 61 and the third distance sensor.

[0083] 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.

[0084] 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, it is not limited thereto, and the shape of the bracket 33 can have other forms that are adapted to the first distance sensor 51, the second distance sensor 61, and the third distance sensor.

[0085] In addition, in an optional embodiment, the in-situ topography measurement system 100 further includes a plurality of shielding shells (not shown). The shielding shells are respectively arranged outside the first distance sensor 51, the second distance sensor 61 and the third distance sensor, and avoid the laser outlet and the laser receiving port. The shielding shell is used to shield the influence of the radiation that may remain in the valve seat 9 on the measurement results of the first distance sensor 51, the second distance sensor 61 and the third distance sensor. Furthermore, the shielding shell can also be covered on the wiring (not shown) connected to the first distance sensor 51, the second distance sensor 61 and the third distance sensor.

[0086] The specific material of the shielding shell is not limited. For example, the material of the shielding shell may include boron carbide, etc. The specific material of the shielding shell may be selected from a material with strong radiation protection capability, so that the shielding shell has a smaller thickness, and thus, the in-situ topography measurement system 100 has a smaller volume and weight.

[0087] The in-situ topography measurement system 100 provided in the embodiment of the present application has the following advantages: 1. Each first distance sensor 51 performs spatial scanning on a portion of the sealing surface 92 , and the morphology 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 .

[0088] 2. The mobile module 4 realizes the adjustment of the position of the bracket 33 together with the first distance measuring module 5 in the valve cavity 90 in a linear driving manner, so that the in-situ topography measurement system 100 can adjust and adapt the valve seat 9 and the sealing surface 92, and the driving method is relatively simple, and the mechanical structure is also relatively simple; 3. The second distance measuring module 6 performs spatial scanning on 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 distance measuring 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 driven 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; 4. The third distance measuring 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 colliding with the inner bottom wall of the valve seat 9 when it moves 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; 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 influence of the radiation in the valve seat 9 on the measurement result. The in-situ topography measurement system 100 can be applied to various types of radiation environments.

[0089] like Fig.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: The sealing surface 92 of the valve seat 9 is spatially scanned by the first distance measuring module 5 to obtain first scanning information; The spatial position information, spatial dimension information and surface parameters of the sealing surface 92 are calculated based on the first scanning information.

[0090] In one embodiment, the in-situ topography measurement method further includes: The reference position 930 in the valve cavity 90 of the valve seat 9 is spatially scanned by the second distance measuring module 6 to obtain second scanning information; Calculate the spatial position information, spatial size information and surface parameters of the reference position 930 according to the second scanning information; and The spatial position information, spatial dimension information and surface parameters of the sealing surface 92 are calculated based on the second scanning information and the first scanning information.

[0091] In one embodiment, the in-situ topography measurement method further includes: 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 a spatial scan is performed toward the inner bottom wall of the valve cavity 90 through the third distance measuring module 7 .

[0092] For details, please refer to Fig.13 As shown, the in-situ topography measurement method includes: Step S1: perform spatial scanning on the reference position 930 through the second distance measurement module 6 to obtain second scanning information; calculate the spatial position information, spatial size information and surface parameters of the reference position 930 according to the second scanning information; Step S2, perform spatial scanning on the sealing surface 92 through the first distance measuring module 5 to obtain first scanning information; calculate the spatial position information, spatial size information and surface parameters of the sealing surface 92 according to the first scanning information and the spatial position information, spatial size information and surface parameters of the above-mentioned reference position 930.

[0093] In one embodiment, before step S1, step S0 is further included: performing spatial scanning toward the inner bottom wall of the valve cavity 90 by the third distance measuring module 7. In this way, the distance between the third distance measuring module 7 and the inner bottom wall of the valve cavity 90 can be confirmed at this time, and / or whether there is an obstacle on the moving path of the first distance measuring module 5 in the valve cavity 90 can be confirmed.

[0094] In one embodiment, step S0 may also be executed at least synchronously with step S2.

[0095] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An in-situ topography measurement system for valve seat sealing surface, characterized in that: include: A support assembly, used for fixed connection with the valve seat, and at least a part of the support assembly is used for being arranged in the valve cavity of the valve seat; The first distance measuring module includes a plurality of first distance sensors, which are respectively arranged on the supporting assembly, and each of the first distance sensors is used to perform spatial scanning on a portion of the sealing surface of the valve seat, and the scanning areas of adjacent first distance sensors partially overlap to cover 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 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.

3. The in-situ topography measurement system for valve seat sealing surface according to claim 2, 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.

4. The in-situ topography measurement system for valve seat sealing surface according to claim 3, 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.

5. The in-situ topography measurement system for valve seat sealing surface according to claim 4, 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 is used to perform spatial scanning on the inner bottom wall of the valve cavity along the opening direction of the opening.

6. The in-situ topography measurement system for valve seat sealing surface according to claim 2, 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.

7. The in-situ topography measurement system for valve seat sealing surface according to any one of claims 1 to 6, characterized in that: The in-situ topography measurement system for the valve seat sealing surface also includes a second distance measuring module, which 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.

8. The in-situ topography measurement system for valve seat sealing surface according to claim 7, 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 surfaces of the second guide parts.

9. The in-situ topography measurement system for 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 processing module, which 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 calculate the topography of the sealing surface.

10. The in-situ topography measurement system for valve seat sealing surface according to any one of claims 1 to 6, 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.

11. A method for measuring the in-situ topography of a valve seat sealing surface, characterized in that: include: Performing a spatial scan on the sealing surface of the valve seat by using a first distance measuring module to obtain first scanning information; The spatial position information, spatial dimension information and surface parameters of the sealing surface are calculated according to the first scanning information.

12. The in-situ topography measurement method for valve seat sealing surface according to claim 11, characterized in that: Also includes: 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; Calculate the spatial position information, spatial size information and surface parameters of the reference position according to the second scanning information; as well as The spatial position information, spatial dimension information and surface parameters of the sealing surface are calculated according to the second scanning information and the first scanning information.

13. The in-situ topography measurement method for a valve seat sealing surface according to claim 11 or 12, characterized in that: Also includes: The first distance measuring module is moved into the valve cavity through the opening of the valve cavity of the valve seat, and a spatial scan is performed toward the inner bottom wall of the valve cavity of the valve seat by using the third distance measuring module.

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