A device and method for measuring the sealing surface of a triple offset butterfly valve body

Abstract

The application provides a kind of three eccentric butterfly valve body sealing surface measuring device and measuring method, the measuring device includes inclined tire, valve body tire, the valve body piece to be detected, valve body measuring scale and measuring body;The measuring body includes measuring base and the valve stem hole positioning shaft arranged in the side of the measuring base;The center of the valve body piece to be detected is provided with channel hole, and the measuring body is located in the channel hole;The valve stem hole is opened in the side of the valve body piece to be detected;The measuring base is installed in the valve stem hole by the valve stem hole positioning shaft and is installed in the valve body tire by the positioning shaft installed in the bottom;The lower end surface of the measuring base is parallel with the lower end surface of the inclined tire;One end of the valve body measuring scale is slidably installed in the measuring base, and the other end can be in contact with the valve body sealing surface of the valve body piece to be detected.The technical scheme of the application relates to the measurement data measurement and processing is simple, and the measurement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three eccentric butterfly valve measurement, in particular, especially relates to a three eccentric butterfly valve body sealing surface measuring device and measuring method. BACKGROUND

[0002] Three eccentric butterfly valve is mainly applied in pipeline transportation and many other occasions, from agricultural irrigation, natural gas and water delivery, to oil and gas exploration, offshore platforms, petroleum refining, petrochemical industry, inorganic chemical industry, energy power generation and other major industrial fields, to regulate flow and cut off fluid. The maximum pressure grade of three eccentric butterfly valve can reach 2500 pounds, the temperature resistance can reach -196 to 700 degrees, suitable for various corrosive environments, large material selection, with various structure length of clamp, lug, flange, ring connection, butt welding, jacket, etc., and can achieve zero leakage. Especially in the large diameter aspect, due to its excellent regulation function, it is constantly replacing the heavy stop valve on the regulating valve; on the shut-off valve, it is constantly replacing the bulky ball valve and gate valve. In various important, severe, critical process control pipelines, as long as the type selection is appropriate, three eccentric butterfly valves can be used to replace the current stop valve, regulating valve and other valves, and the cost is low. Three eccentric butterfly valves have the advantages of various valves and the disadvantages of various valves, and become the new star of the current valve industry, and are highly valued by the majority of users and designers.

[0003] The processing of the sealing surface of the three eccentric butterfly valve body is one of the key processes of the three eccentric butterfly valve processing, and the processing precision of the sealing surface has a great influence on the subsequent assembly, which continuously improves the measurement and detection requirements of the size of the sealing surface of the three eccentric butterfly valve body, and further puts forward higher requirements on the precision and measurement difficulty of the size measuring tool of the sealing surface of the three eccentric butterfly valve body.

[0004] The sealing surface shape of the three eccentric butterfly valve can be regarded as being obtained by beveling a circular cone with two parallel planes, and is an oval cross section. The common three eccentric butterfly valve body sealing surface size measurement methods in the prior art include conventional special gauge measurement, three coordinate measuring instrument detection and taper hole measuring standard piece detection. The conventional gauge measures the size of the sealing surface of the three eccentric butterfly valve body online, the error is large, and it cannot meet the production and processing requirements; the three coordinate measuring instrument cannot realize measurement in processing, needs to disassemble the workpiece, and affects the processing precision; the taper hole measuring standard piece needs to be converted through a complex formula after measurement, and the measurement method and calculation method are complicated. SUMMARY

[0005] In view of the problems existing in the prior art, the present application provides a three eccentric butterfly valve body sealing surface measuring device and measuring method.

[0006] The technical means adopted by the present application is as follows:

[0007] A three-eccentric butterfly valve body sealing surface measuring device, comprising an inclined body, a valve body, a valve body to be detected, a valve body measuring scale and a measuring body; the valve body is installed on the upper end surface of the inclined body, and the valve body to be detected is installed on the upper end surface of the valve body;

[0008] The measuring body comprises a measuring base and a valve stem hole positioning shaft arranged on the side of the measuring base; the valve body to be detected is provided with a passage hole in the center, and the measuring body is located in the passage hole; the valve body to be detected is provided with a valve stem hole on the side; the measuring base is installed in the valve stem hole through the valve stem hole positioning shaft and is installed on the valve body through the positioning shaft installed on the bottom; the lower end surface of the measuring base is parallel to the lower end surface of the inclined body;

[0009] One end of the valve body measuring scale is slidably installed on the measuring base, and the other end can be in contact with the valve body sealing surface of the valve body to be detected.

[0010] Further, the inclined body is an inclined disc-shaped tool, the upper end surface of the inclined body is an inclined surface, a valve body positioning hole is arranged in the center of the inclined surface, a valve body positioning shaft is arranged in the center of the valve body positioning hole, the valve body is provided with a mounting hole matched with the valve body positioning shaft, and the lower part of the valve body is installed in the valve body positioning hole through the mounting hole matched with the valve body positioning shaft, and the rotation axis of the valve body positioning shaft is in the same axis line as the rotation axis of the inclined body.

[0011] Further, the valve body is a cylindrical tool, and the upper end surface and the lower end surface of the valve body are respectively provided with a valve positioning cylinder and a valve body positioning cylinder; the valve body positioning cylinder is installed in the valve body positioning hole and is used for positioning when the lower part of the valve body is installed in the valve body positioning hole; the valve positioning cylinder is installed in the passage hole of the valve body to be detected and is used for positioning when the valve body to be detected is installed on the upper end surface of the valve body; and the rotation axis of the valve body positioning hole is in the same axis line as the rotation axis of the valve body.

[0012] Further, the lower end surface of the valve body to be detected is in the same plane as the upper end surface of the valve body, and the lower end surface of the valve body is in the same plane as the upper end surface of the inclined body; the inclination angle of the upper end surface of the inclined body is equal to the half vertex angle θ of the corresponding cone of the valve body sealing surface.

[0013] Further, an inclined guide hole is arranged on the valve body, and the positioning shaft is installed in the inclined guide hole; when the valve body is installed on the upper end surface of the inclined body, the axis lines of the positioning shaft and the inclined guide hole are in the same axis line as the rotation axis of the inclined body.

[0014] Further, the bottom of the measuring base is provided with a positioning hole for mounting the positioning shaft.

[0015] Further, the upper and lower parts of the positioning shaft are respectively provided with upper and lower cones, the positioning hole is a tapered hole matched with the upper cone, the inclined guide hole is a tapered hole matched with the lower cone, and the two ends of the positioning shaft are mounted in the positioning hole and the inclined guide hole through the upper and lower cones.

[0016] Further, the front end of the valve rod hole positioning shaft is a tapered structure, and the valve rod hole is a tapered hole matched with the tapered structure.

[0017] Further, as shown in the figure, the surface of the measuring base is provided with a sliding groove, the valve body measuring scale is slidingly mounted in the sliding groove, and the valve body measuring scale is coaxially mounted with the sliding groove; the axis of the valve rod hole positioning shaft is perpendicular to the axis of the sliding groove; the axis of the positioning hole is perpendicular to the axis of the valve rod hole positioning shaft;

[0018] The angle between the axis of the sliding groove and the lower end surface of the measuring base is equal to the half vertex angle θ of the corresponding cone of the valve body sealing surface; the valve body measuring scale is marked with a scale value; when the lower end surface of the inclined tire is in a horizontal plane and the plane in which the lower end surface of the measuring base is located is parallel to the horizontal plane: the valve body measuring scale can be tangentially contacted with the valve body sealing surface, the axis of the valve body measuring scale is perpendicular to the generatrix of the corresponding cone of the valve body sealing surface, and the measurement value of the valve body measuring scale is L1.

[0019] Further, the valve body measuring scale comprises a measuring contact and a scale body which are coaxially arranged; the measuring contact is spherical; the measuring contact is mounted at one end of the scale body, the other end of the scale body is slidingly mounted in the sliding groove, and the scale body is marked with a scale value.

[0020] The application also provides a three-eccentric butterfly valve body sealing surface measuring method, which adopts the measuring device.

[0021] S1: placing the inclined tire in a horizontal plane, and making the plane in which the lower end surface of the measuring base is located parallel to the horizontal plane;

[0022] S2: slidingly adjusting the valve body measuring scale along the sliding groove, so that the valve body measuring scale is tangentially contacted with the valve body sealing surface, and the axis of the valve body measuring scale is perpendicular to the generatrix of the corresponding cone of the valve body sealing surface;

[0023] S3: reading the measurement value L1 of the valve body measuring scale along the axial direction of the valve body measuring scale, that is, reading the scale value on the valve body measuring scale corresponding to the end surface of the side of the sliding groove close to the position where the valve body measuring scale is tangentially contacted with the valve body sealing surface.

[0024] S4: measuring S value and calculating characteristic size L of the valve body sealing surface according to the following formula:

[0025] L=S+L1cosθ

[0026] Wherein, S is the distance between the axis of the cone corresponding to the valve body piece and the end face of one side of the chute close to the valve body measuring scale and the tangent contact of the valve body sealing surface, and θ is the half vertex angle of the cone corresponding to the valve body sealing surface.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] The three-eccentric butterfly valve valve body sealing surface measuring device and measuring method provided by the present application can make the measuring contact head tangentially contact the valve body sealing surface of the valve body piece to be detected, and then measure the characteristic size, and the spherical contact head is used to measure the size of the valve body sealing surface, which reduces the processing difficulty of the measuring original piece, and the measuring data measurement and processing involved in the measuring method are simple, and the measuring efficiency is improved.

[0029] Based on the above reasons, the present application can be widely popularized in the field of valve body measurement. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 The structure diagram of the three-eccentric butterfly valve valve body sealing surface measuring device is shown in the figure.

[0032] Figure 2 The structure diagram of the measuring main body is shown in the figure.

[0033] Figure 3 The structure diagram of the valve body measuring scale is shown in the figure.

[0034] Figure 4 The structure diagram of the inclined body is shown in the figure.

[0035] Figure 5 The structure diagram of the valve body body is shown in the figure.

[0036] Figure 6 The structure diagram of the positioning shaft is shown in the figure.

[0037] Figure 7The figure is a schematic diagram of the measuring method principle of the sealing surface of the three eccentric butterfly valve body.

[0038] In the figure: 1, inclined tire; 2, valve body tire; 3, valve body part to be detected; 4, valve body measuring scale; 5, measuring main body; 6, valve body sealing surface; 7, positioning shaft; 8, positioning hole; 9, measuring base; 10, sliding groove; 11, valve stem hole positioning shaft; 12, measuring contact; 13, scale body; 14, valve body tire guide shaft; 15, valve body tire positioning hole; 16, valve body tire positioning cylinder; 17, valve body positioning cylinder; 18, inclined guide hole; 19, lower cone; 20, upper cone. DETAILED DESCRIPTION

[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0042] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and operation described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the claims. The application is also not limited to the details of the foregoing embodiment.

[0043] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0044] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0045] In addition, it should be noted that the use of the terms "first", "second", and the like do not have a special meaning, and are merely used to distinguish the corresponding components, and therefore cannot be construed as limiting the scope of protection of the present application.

[0046] Example 1

[0047] As shown in Figures 1-2 The application provides a three-eccentric butterfly valve body sealing surface measuring device, which comprises an inclined tire 1, a valve body tire 2, a valve body piece to be detected 3, a valve body measuring scale 4 and a measuring body 5; the valve body tire 2 is installed on the upper end face of the inclined tire 1, and the valve body piece to be detected 3 is installed on the upper end face of the valve body tire 2.

[0048] The measuring body 5 comprises a measuring base 9 and a valve stem hole positioning shaft 11 arranged on the side of the measuring base 9; the valve body piece to be detected 3 is provided with a passage hole in the center, the measuring body 5 is located in the passage hole, the valve body piece to be detected 3 is provided with a valve stem hole on the side, the measuring base 9 is installed in the valve stem hole through the valve stem hole positioning shaft 11 and is installed on the valve body tire 2 through the positioning shaft 7 installed on the bottom; the lower end face of the measuring base 9 is parallel to the lower end face of the inclined tire 1.

[0049] One end of the valve body measuring scale 4 is slidably installed on the measuring base 9, and the other end can be in contact with the valve body sealing surface 6 of the valve body piece to be detected 3; in use, the valve disc can be installed in the passage hole, and the valve body sealing surface 6 is the inner wall of the upper part of the passage hole, which can be closely attached to the sealing surface of the valve disc after the valve disc is installed.

[0050] Further, as shown in Figure 4 The inclined tire 1 is an inclined disc-shaped tool, the upper end face of the inclined tire 1 is an inclined surface, the inclined surface is provided with a valve body tire positioning hole 15 in the center, the valve body tire positioning hole 15 is provided with a valve body tire guide shaft 14 in the center, the valve body tire 2 is provided with a mounting hole matched with the valve body tire guide shaft 14, the lower part of the valve body tire 2 is installed in the valve body tire positioning hole 15 through the mounting hole matched with the valve body tire guide shaft 14, and the rotary axis of the valve body tire guide shaft 14 is on the same axis as the rotary axis of the inclined tire 1.

[0051] Further, as shown in Figure 5 The valve body tire 2 is a cylindrical tool, the upper end face and the lower end face of the valve body tire 2 are respectively provided with a valve body positioning cylinder 17 and a valve body tire positioning cylinder 16; the valve body tire positioning cylinder 16 is installed in the valve body tire positioning hole 15 and is used for positioning when the lower part of the valve body tire 2 is installed in the valve body tire positioning hole 15; the valve body positioning cylinder 17 is installed in the passage hole of the valve body piece to be detected 3 and is used for positioning when the valve body piece to be detected 3 is installed on the upper end face of the valve body tire 2; the rotary axis of the valve body tire positioning hole 15 is on the same axis as the rotary axis of the valve body tire 2.

[0052] Further, the lower end surface of the valve body piece 3 to be measured is in the same plane as the upper end surface of the valve body body 2, and the lower end surface of the valve body body 2 is in the same plane as the upper end surface of the inclined body 1; the inclination angle of the upper end surface of the inclined body 1 is equal to the half vertex angle θ of the corresponding cone of the valve body sealing surface 6, and the inclination angle of the upper end surface of the inclined body 1 means that the plane on which the lower end surface of the inclined body 1 is located is a horizontal plane, and the angle between the plane on which the upper end surface of the inclined body 1 is located and the horizontal plane.

[0053] Further, the inclined guide hole 18 is provided on the valve body body 2, and the positioning shaft 7 is installed in the inclined guide hole 18; when the valve body body 2 is installed on the upper end surface of the inclined body 1, the axis of the positioning shaft 7 and the axis of the inclined guide hole 18 are in the same axis as the axis of revolution of the inclined body 1.

[0054] Further, the lower end surface of the valve body piece 3 to be measured is in the same plane as the upper end surface of the valve body body 2, and the lower end surface of the valve body body 2 is in the same plane as the upper end surface of the inclined body 1; the inclination angle of the upper end surface of the inclined body 1 is equal to the half vertex angle θ of the corresponding cone of the valve body sealing surface 6, and the inclination angle of the upper end surface of the inclined body 1 means that the plane on which the lower end surface of the inclined body 1 is located is a horizontal plane, and the angle between the plane on which the upper end surface of the inclined body 1 is located and the horizontal plane.

[0055] Further, as shown in Figure 6 the upper and lower parts of the positioning shaft 7 are respectively provided with tapered upper and lower cones 19 and 20, the positioning hole 8 is a tapered hole matched with the upper cone 19, the inclined guide hole 18 is a tapered hole matched with the lower cone 20, and the positioning shaft 7 is installed in the positioning hole 8 and the inclined guide hole 18 through the upper and lower cones 19 and 20 at both ends, respectively. The tapered upper and lower cones 19 and 20 and the positioning hole 8 and the inclined guide hole 18 matched therewith can improve the positioning accuracy and the matching accuracy.

[0056] Further, the front end of the valve stem hole positioning shaft 11 is a tapered structure, the valve stem hole is a tapered hole matched with the tapered structure, and the valve stem hole positioning shaft 11 is installed through the matching of the tapered structure and the tapered hole, which can improve the positioning accuracy and the matching accuracy.

[0057] Further, as shown in Figure 2 the surface of the measuring base 9 is provided with a sliding groove 10, the valve body measuring scale 4 is slidingly installed in the sliding groove 10, and the valve body measuring scale 4 is coaxially installed with the sliding groove 10; the axis of the valve stem hole positioning shaft 11 is perpendicular to the axis of the sliding groove 10, but the two straight lines are not in the same plane and belong to different surface straight lines; the axis of the positioning hole 8 is perpendicular to the axis of the valve stem hole positioning shaft 11;

[0058] The angle between the axis of the sliding groove 10 and the lower end surface of the measuring base 9 is equal to the half vertex angle θ of the corresponding cone of the valve body sealing surface 6; the valve body measuring scale 4 is marked with scale values; when the lower end surface of the inclined body 1 is in a horizontal plane, and the plane in which the lower end surface of the measuring base 9 is parallel to the horizontal plane: the valve body measuring scale 4 can be in tangential contact with the valve body sealing surface 6, the axis of the valve body measuring scale 4 is perpendicular to the generatrix of the corresponding cone of the valve body sealing surface 6, and the measurement value of the valve body measuring scale 4 is L1.

[0059] Further, as shown in the drawings, the valve body measuring scale 4 comprises a measuring contact 12 and a scale body 13 arranged coaxially; the measuring contact 12 is spherical; the measuring contact 12 is installed at one end of the scale body 13, the other end of the scale body 13 is slidingly installed in the sliding groove 10, and the scale body 13 is marked with scale values; the application adopts the spherical measuring contact 12, which is not limited by the angle of the valve body sealing surface 6 of specific specifications, improves the universality, and the spherical measuring contact 12 can also be calibrated before measurement, further improving the measurement accuracy. Figure 3

[0060] When the measuring device is used, the valve body 2 is placed on the upper end surface of the inclined body 1, the valve body part 3 to be detected is placed on the upper end surface of the inclined body 2, the measuring main body 5 is placed in the central passage hole of the valve body part 3 to be detected, the lower part of the positioning shaft 7 is installed in the inclined guide hole 18, the lower cone 19 of the positioning shaft 7 is tightly matched with the inclined guide hole 18, the upper part of the positioning shaft 7 is installed in the positioning hole 8 on the measuring main body 5, the positioning hole 8 is tightly matched with the upper cone 20 of the positioning shaft 7, and the valve rod hole positioning shaft 11 on the measuring main body 5 is tightly matched with the valve rod hole of the valve body part 3 to be detected; the valve body measuring scale 4 is adjusted along the sliding groove 10 until the measuring contact 12 can be in tangential contact with the valve body sealing surface 6 of the valve body part 3 to be detected, and subsequent measurement can be performed.

[0061] As shown in the drawings, the application also provides a three-eccentric butterfly valve body sealing surface measuring method, which adopts the above-mentioned measuring device, and specifically comprises the following steps: Figure 7 S1: placing the inclined body 1 on a horizontal plane, and making the plane in which the lower end surface of the measuring base 9 is parallel to the horizontal plane;

[0062] S2: slidingly adjusting the valve body measuring scale 4 along the sliding groove 10, so that the valve body measuring scale 4 is in tangential contact with the valve body sealing surface 6, and the axis of the valve body measuring scale 4 is perpendicular to the generatrix of the corresponding cone of the valve body sealing surface 6;

[0063]

[0064] ​​S3: along the axial direction of the valve body measuring scale 4, read the measurement value L1 of the valve body measuring scale 4, that is, the end face of one side of the chute 10 close to the tangent contact between the valve body measuring scale 4 and the valve body sealing surface 6 corresponds to the scale value on the valve body measuring scale 4;

[0065] S4: measure the S value and calculate the characteristic size L of the valve body sealing surface 6 according to the following formula:

[0066] L=S+L1cosθ

[0067] Wherein, S is the distance between the axis of the corresponding cone of the valve body piece 3 to be detected and the end face of one side of the chute 10 close to the tangent contact between the valve body measuring scale 4 and the valve body sealing surface 6, and θ is the half vertex angle of the corresponding cone of the valve body sealing surface 6.

[0068] When the valve body sealing surface 6 of the valve body piece 3 to be detected is processed, the value of the characteristic size L can be calculated according to the real-time measurement value L1 to monitor the processing process in real time. As the processing process proceeds, when the value of the characteristic size L meets the requirements, it indicates that the processing is completed.

[0069] Further, the edge of the chute 10 is marked with a scale value, which can facilitate the staff to check the change of the measurement value L1 as the processing process proceeds.

[0070] The measuring device provided by the application measures the characteristic size of the sealing surface of the valve body piece to be detected, which is suitable for valve body pieces of different sizes and is not limited by the specifications of the valve body piece, improves the universality, uses a spherical contact to measure the size of the valve body sealing surface, reduces the processing difficulty of the measured element, and the measurement data processing involved in the measurement method is simple, which improves the measurement efficiency and is conducive to realizing the online measurement of the three-eccentric butterfly valve body.

[0071] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A method for measuring the sealing surface of a triple eccentric butterfly valve body, characterized in that, The measuring device for the sealing surface of the triple eccentric butterfly valve body includes a slant tire (1), a valve body tire (2), a valve body component to be inspected (3), a valve body measuring ruler (4), and a measuring body (5); the valve body tire (2) is installed on the upper end face of the slant tire (1), and the valve body component to be inspected (3) is installed on the upper end face of the valve body tire (2); The measuring body (5) includes a measuring base (9) and a valve stem hole positioning shaft (11) disposed on the side of the measuring base (9); the valve body (3) to be inspected has a channel hole in the center, and the measuring body (5) is located in the channel hole; the valve body (3) to be inspected has a valve stem hole on its side; the measuring base (9) is installed in the valve stem hole through the valve stem hole positioning shaft (11), and is installed in the valve body tire (2) through the positioning shaft (7) installed at the bottom; the lower end face of the measuring base (9) is parallel to the lower end face of the inclined tire (1); One end of the valve body measuring ruler (4) is slidably mounted on the measuring base (9), and the other end can contact the valve body sealing surface (6) of the valve body component (3) to be inspected; The measuring base (9) has a groove (10) on its surface. The valve body measuring ruler (4) is slidably installed in the groove (10). The valve body measuring ruler (4) is coaxially installed with the groove (10). The axis of the valve stem hole positioning shaft (11) is perpendicular to the axis of the groove (10). The axis of the positioning hole (8) is perpendicular to the axis of the valve stem hole positioning shaft (11). The angle between the axis of the slide groove (10) and the lower end face of the measuring base (9) is equal to the half-apex angle θ of the cone corresponding to the valve body sealing surface (6); the valve body measuring ruler (4) is marked with a scale value; when the lower end face of the inclined tire (1) is on the horizontal plane, and the plane where the lower end face of the measuring base (9) is located is parallel to the horizontal plane: the valve body measuring ruler (4) can be in tangential contact with the valve body sealing surface (6), the axis of the valve body measuring ruler (4) is perpendicular to the generatrix of the cone corresponding to the valve body sealing surface (6), and the measurement value of the valve body measuring ruler (4) is L1; The method includes: S1: Place the inclined tire (1) on a horizontal plane, with the plane containing the lower end face of the measuring base (9) parallel to the horizontal plane; S2: Slide the valve body measuring scale (4) along the slide groove (10) to make the valve body measuring scale (4) tangentially contact the valve body sealing surface (6), and the axis of the valve body measuring scale (4) is perpendicular to the generatrix of the cone corresponding to the valve body sealing surface (6); S3: Along the axial direction of the valve body measuring scale (4), read the measured value L1 of the valve body measuring scale (4), that is, the end face of the slide groove (10) that is close to the valve body measuring scale (4) and the valve body sealing surface (6) corresponds to the scale value on the valve body measuring scale (4). S4: Calculate the characteristic dimension L of the valve body sealing surface (6) according to the following formula: L=S+ L1cosθ Wherein, S is the distance between the axis of the cone corresponding to the valve body component under test and the end face of the slide groove near the side where the valve body measuring scale and the valve body sealing surface are in tangential contact, and θ is the half-apex angle of the cone corresponding to the valve body sealing surface.

2. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The inclined tire (1) is a slant-shaped tool. The upper surface of the inclined tire (1) is an inclined surface. A valve body tire positioning hole (15) is opened in the center of the inclined surface. A valve body tire guide shaft (14) is set in the center of the valve body tire positioning hole (15). The valve body tire (2) is provided with a mounting hole that matches the valve body tire guide shaft (14). The lower part of the valve body tire (2) is installed in the valve body tire positioning hole (15) through the mounting hole and the valve body tire guide shaft (14). The rotation axis of the valve body tire guide shaft (14) and the rotation axis of the inclined tire (1) are on the same axis.

3. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The valve body fixture (2) is a cylindrical tooling. The upper and lower ends of the valve body fixture (2) are respectively provided with a valve body positioning cylinder (17) and a valve body fixture positioning cylinder (16). The valve body fixture positioning cylinder (16) is installed in the valve body fixture positioning hole (15). The valve body positioning cylinder (17) is installed in the channel hole of the valve body component (3) to be inspected. The rotation axis of the valve body fixture positioning hole (15) is on the same axis as the rotation axis of the valve body fixture (2).

4. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The lower end face of the valve body component (3) to be inspected is on the same plane as the upper end face of the valve body tire (2), and the lower end face of the valve body tire (2) is on the same plane as the upper end face of the inclined tire (1); the inclination angle of the upper end face of the inclined tire (1) is equal to the half-apex angle θ of the cone corresponding to the valve body sealing surface (6).

5. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The valve body (2) is provided with an inclined guide hole (18), and the positioning shaft (7) is installed in the inclined guide hole (18). When the valve body (2) is installed on the upper end face of the inclined tire (1), the axes of the positioning shaft (7) and the inclined guide hole (18) are both on the same axis as the rotation axis of the inclined tire (1).

6. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The bottom of the measuring base (9) is provided with a positioning hole (8) for mounting the positioning shaft (7).

7. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 5, characterized in that, The upper and lower parts of the positioning shaft (7) are respectively provided with a tapered upper cone (19) and a lower cone (20). The positioning hole (8) is a tapered hole that matches the upper cone (19). The inclined guide hole (18) is a tapered hole that matches the lower cone (20). The two ends of the positioning shaft (7) are respectively installed in the positioning hole (8) and the inclined guide hole (18) through the upper cone (19) and the lower cone (20).

8. The method for measuring the sealing surface of a triple eccentric butterfly valve body according to claim 1, characterized in that, The valve body measuring ruler (4) includes a measuring contact (12) and a ruler body (13) arranged coaxially; the measuring contact (12) is spherical; the measuring contact (12) is installed at one end of the ruler body (13), and the other end of the ruler body (13) is slidably installed in the slide groove (10), and the ruler body (13) is marked with scale values.

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