A radial measuring tool for a flange gasket groove
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZUOYANG IND TECH (SHENZHEN) CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-23
Smart Images
Figure CN224398550U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flange gasket measurement technology, specifically, to a radial measuring tool for flange gasket grooves. Background Technology
[0002] In industrial piping systems, flange gaskets are critical components ensuring the sealing of pipe connections. The radial dimensional accuracy of the gasket groove directly affects sealing performance and equipment operational safety. Therefore, precise measurement of the outer and inner diameters of the flange gasket groove is an important task in the manufacturing and quality inspection processes.
[0003] Currently, in the field of flange gasket groove measurement, traditional measuring tools generally suffer from limited functionality and low measurement efficiency. Most measuring tools can only perform single-item measurements of the outer or inner diameter. When it is necessary to measure both the outer and inner diameters of the gasket groove, operators have to change measuring tools, which not only prolongs the measurement cycle but also increases the complexity of the operation process, resulting in low overall measurement efficiency. In addition, some existing measuring tools have large measurement errors, failing to meet the high-precision measurement requirements of modern industrial production.
[0004] The above problems are worth solving. Utility Model Content
[0005] To address the issues of limited functionality and low measurement efficiency in existing radial measuring tools for flange gasket grooves, this invention provides a radial measuring tool for flange gasket grooves.
[0006] The technical solution of this utility model is as follows:
[0007] A radial measuring tool for a flange sealing gasket groove includes an upper reference module, a lower reference module, and a connecting rod. Both the upper and lower reference modules have measuring heads on their lower surfaces. The upper reference module is fixed to one end of the connecting rod, and the lower reference module is mounted on the other end of the connecting rod and its position is adjustable. The upper reference module contains a slider and an elastic element. The measuring head of the upper reference module is mounted on the bottom of the slider. One end of the elastic element is connected to the slider, and the other end is connected to a first or second position on the inner wall of the upper reference module. In different connection positions, the force exerted by the elastic element on the slider is opposite in direction. A dial indicator is provided on the outside of the upper reference module. The measuring rod of the dial indicator extends laterally into the upper reference module, and the end of the measuring rod abuts against the slider and is in a compressed state.
[0008] As a preferred embodiment of this utility model, the measuring head includes a rod body and a ball head. The top end of the rod body is provided with a regular polygonal inner corner groove. The rod body of the measuring head of the upper reference module is connected to the slider, and the rod body of the measuring head of the lower reference module is connected to the lower reference module. The distance between the ball heads of the two reference modules extending out of the lower surface of the module is equal to the diameter of the ball head.
[0009] As a preferred embodiment of this utility model, the upper reference module is provided with an L-shaped sliding cavity, including a vertical cavity and a horizontal cavity; the slider is an L-shaped sliding block; the horizontal cavity is provided with a slide rail, and the horizontal part of the L-shaped sliding block is slidably connected to the slide rail;
[0010] The lateral width of the vertical cavity is greater than the thickness of the vertical portion of the L-shaped sliding block, and the difference determines the maximum sliding distance of the L-shaped sliding block, which is equal to the effective range of the radial measuring tool.
[0011] Furthermore, the top of the upper reference module is provided with a first vertical through hole communicating with the vertical cavity, the vertical part of the L-shaped sliding block is provided with a second vertical through hole, the rod part of the measuring head is threadedly connected to the second vertical through hole, and the upper reference module is provided with a first fastening bolt for fastening the rod part.
[0012] As a preferred embodiment of this utility model, the bottom of the upper reference module is provided with an upper reference pad, the upper reference pad is provided with an elliptical hole, and the measuring head of the upper reference module passes through the elliptical hole; the bottom of the lower reference module is provided with a lower reference pad, the lower reference pad is provided with a circular hole, and the measuring head of the lower reference module passes through the circular hole.
[0013] As a preferred embodiment of this utility model, the lower reference module is provided with a transverse through hole, the end of the connecting rod passes through the transverse through hole, and the lower reference module is also provided with two knurled locking bolts, which extend vertically through the transverse through hole and abut against the connecting rod to fasten the lower reference module to the connecting rod.
[0014] Furthermore, the lower reference module is provided with a third vertical through hole that connects to the horizontal through hole. The rod part of the measuring head of the lower reference module is threadedly connected to the third vertical through hole. The lower reference module is provided with a second fastening bolt for fastening the rod part.
[0015] As a preferred embodiment of this utility model, the elastic element includes a first pin, a tension spring, and a second pin; the side wall of the upper reference module is provided with a window with a cover plate, one end of the cover plate is provided with the first pin, the outer side wall of the slider is provided with the second pin, one end of the tension spring is connected to the first pin, and the other end of the tension spring is connected to the second pin.
[0016] The first end of the cover plate is connected to the first side of the window, and the second end of the cover plate is connected to the second side of the window, so as to place the first pin in the first position;
[0017] The first end of the cover plate is connected to the second side of the window, and the second end of the cover plate is connected to the first side of the window to place the first pin in the second position.
[0018] As a preferred embodiment of this utility model, the upper reference module is provided with a dial indicator mounting groove and a through hole located on the side wall of the dial indicator mounting groove. The upper reference module is also provided with two symmetrically distributed third fastening bolts perpendicular to the axis of the through hole. The third fastening bolts are used to fasten the dial indicator.
[0019] In a preferred embodiment of this utility model, the connecting rod is a straight rod; or, the connecting rod includes a U-shaped main rod and auxiliary rods connected to both sides of the U-shaped main rod.
[0020] Furthermore, the connecting rod also includes an extension rod, which is detachably connected to the end of the straight rod or the auxiliary rod via a rod connecting block.
[0021] Furthermore, the rod connecting block is provided with a through hole and several fastening holes, the fastening holes being used to insert fastening bolts to fix the two rods inserted into the through holes from both sides respectively.
[0022] The advantages of this utility model based on the above solution are as follows:
[0023] This utility model only requires adjusting the connection position of the elastic element to realize the measurement conversion between the outer diameter and the inner diameter of the flange sealing gasket groove, without the need to replace additional tools or parts. It breaks the limitation of the single function of traditional measuring tools and integrates the measurement of outer diameter and inner diameter into one.
[0024] This invention employs a deviation measurement method, combined with the dial indicator's ability to sensitively capture minute displacements of the slider. The tool can accurately reflect the subtle differences between the actual dimensions of the groove and the design benchmark, resulting in high measurement accuracy. Simultaneously, it can promptly detect dimensional deviations in the produced workpieces, ensuring that the workpieces meet stringent design standards, effectively improving product quality, reducing defect rates and scrap rates, and lowering production costs for enterprises. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of this utility model;
[0026] Figure 2 This is a cross-sectional view of the structure of this utility model;
[0027] Figure 3 A comparative diagram showing the measurement of the outer diameter and inner diameter of the trench;
[0028] Figure 4 This is an exploded view of the upper reference module of this utility model;
[0029] Figure 5 This is a schematic diagram of the cover plate installation when measuring the outer diameter of the trench;
[0030] Figure 6 This is a schematic diagram of the cover plate installation when measuring the inner diameter of the trench;
[0031] Figure 7 This is a schematic diagram of a preferred embodiment.
[0032] In the diagram,
[0033] 1. Upper reference module; 11. Elastic element; 111. First pin; 112. Tension spring; 113. Second pin; 12. Slide rail; 13. First vertical through hole; 14. L-shaped sliding block; 141. Second vertical through hole; 15. First fastening bolt; 16. Table mounting groove; 17. Third fastening bolt; 18. Upper reference pad; 19. Cover plate;
[0034] 2. Lower reference module; 21. Lower reference pad; 22. Knurled locking bolt; 23. Third vertical through hole; 24. Second fastening bolt;
[0035] 3. Connecting rod; 31. U-shaped main rod; 32. Secondary rod; 33. Extension rod; 34. Rod connecting block;
[0036] 4. Dial indicator; 41. Measuring rod;
[0037] 5. Measuring head; 51. Rod body; 52. Ball head;
[0038] 6. Flange gasket. Detailed Implementation
[0039] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.
[0040] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.
[0041] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0042] The terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. “Several” means two or more, unless otherwise expressly and specifically defined.
[0043] like Figure 1 and Figure 2 As shown, a radial measuring tool for a flange gasket groove includes an upper reference module 1, a lower reference module 2, and a connecting rod 3. The connecting rod 3 connects the upper reference module 1 and the lower reference module 2. The upper reference module 1 is fixed to one end of the connecting rod 3, and the lower reference module 2 is installed on the other end of the connecting rod 3 and its position is adjustable. Measuring heads 5 are provided on the lower surfaces of both the upper and lower reference modules 1 and 2. During measurement, when the distal ends of the two measuring heads 5 abut against the outer wall of the groove of the flange gasket 6, the outer diameter of the groove can be detected; when the proximal ends of the two measuring heads 5 abut against the inner wall of the flange gasket groove, the inner diameter of the groove can be detected. (Refer to...) Figure 3 As shown: the two measuring heads 5 in the upper figure are used to detect the outer diameter of the groove, and the two measuring heads 5 in the lower figure are used to detect the inner diameter of the groove.
[0044] The radial measuring tool of this invention does not directly measure the radial value, but rather measures the deviation between the actual value and the design value. The actual radial value is then calculated from the deviation value. For example, taking the measurement of the outer diameter of the groove of a flange gasket 6 as an example, first adjust the distance between the farthest ends of the two measuring heads 5 of the upper reference module 1 and the lower reference module 2 to make it equal to the outer diameter design value on the drawing. Then, use the adjusted radial measuring tool to measure the outer diameter of the groove of the actual workpiece. If the measured result is 0, it means that the actual value of the outer diameter of the groove is exactly equal to the design value; if a deviation value is obtained, it means that there is a deviation between the actual value of the outer diameter of the groove and the design value. The actual value can be calculated from the design value and the deviation value.
[0045] The adjustable structure of the lower reference module 2 at the end of the connecting rod 3 is as follows: the lower reference module 2 has a transverse through hole, into which the end of the connecting rod 3 passes. The lower reference module 2 also has two knurled locking bolts 22, which are vertically inserted into the lower reference module 2 up to the transverse through hole, so that the knurled locking bolts 22 abut against the connecting rod 3, thus securing the lower reference module 2 to the connecting rod 3. When it is necessary to move the lower reference module 2, simply loosen the two knurled locking bolts 22, and the lower reference module 2 can be moved laterally on the connecting rod 3.
[0046] The upper reference module 1 has a slider and an elastic element 11 inside. The measuring head 5 of the upper reference module 1 is installed at the bottom of the slider. One end of the elastic element 11 is connected to the slider, and the other end is connected to the inner wall of the upper reference module 1, so that the elastic force of the elastic element 11 is applied to the slider. The function of the elastic force is to give the slider the power to move towards the side wall being measured, so that the measuring head 5 at the bottom of the slider is always in contact with the side wall of the groove during the measurement process. Specifically, it is in contact with the outer side wall when measuring the outer diameter, and in contact with the inner side wall when measuring the inner diameter.
[0047] In this embodiment, the slider is an L-shaped sliding block 14, which includes a horizontal portion and a vertical portion. The measuring head 5 of the upper reference module 1 is installed at the bottom of the horizontal portion of the L-shaped sliding block 14. The upper reference module 1 has an L-shaped sliding cavity for the L-shaped sliding block 14 to slide inside. The L-shaped sliding cavity includes a vertical cavity and a horizontal cavity. The horizontal cavity is provided with a slide rail 12, and the horizontal portion of the L-shaped sliding block 14 is slidably connected to the slide rail 12. The horizontal width of the vertical cavity is greater than the thickness of the vertical portion of the L-shaped sliding block 14, thereby providing sliding space for the L-shaped sliding block 14. The difference between the horizontal width of the vertical cavity and the thickness of the vertical portion of the L-shaped sliding block 14 determines the maximum sliding distance of the L-shaped sliding block 14. This difference is equal to the effective range of the radial measuring tool. Considering that the tolerance of various dimensions of a flange in general production will not exceed 5 mm, the difference can be designed to be 5 mm.
[0048] In this embodiment, a dial indicator 4 is provided on the outside of the upper reference module 1. The measuring rod 41 of the dial indicator 4 is inserted laterally into the upper reference module 1, and the end probe of the measuring rod 41 abuts against the vertical part of the L-shaped sliding block 14. When the dial indicator 4 is installed in place, the probe of the dial indicator 4 is always in a compressed state, regardless of where the L-shaped sliding block 14 slides. In a preferred embodiment, a stepped groove is provided on one side of the upper reference module 1. The stepped groove has an arc-shaped sidewall to adapt to the contour of the dial indicator 4. The sidewall of the dial mounting groove 16 is provided with a through hole, through which the measuring rod 41 of the dial indicator 4 is inserted into the cavity inside the upper reference module 1. The upper reference module 1 is provided with two symmetrically distributed third fastening bolts 17. The two third fastening bolts 17 are perpendicular to the axial direction of the through hole. The third fastening bolts 17 are used to fasten the rod sleeve of the measuring rod 41 of the dial indicator 4, thereby fixing the dial indicator 4 at the dial mounting groove 16. In addition to using a dial indicator 4, a micrometer dial indicator with higher scale accuracy can also be used.
[0049] Since the outer and inner walls of the groove are located at opposite positions on the measuring head 5, the forces exerted by the elastic element 11 on the slider for measuring the outer and inner diameters of the groove are opposite. For example, when measuring the outer diameter, the elastic element 11 needs to apply a force to the left as shown in the diagram, and when measuring the inner diameter, the elastic element 11 needs to apply a force to the right as shown in the diagram. Therefore, the direction of the elastic force of the elastic element 11 in this invention can be adjusted according to whether the outer or inner diameter is being measured.
[0050] In an optional embodiment, the elastic element 11 includes a first pin 111, a tension spring 112, and a second pin 113. The first pin 111 is disposed on the side wall of the upper reference module 1, and the second pin 113 is disposed on the lateral side of the L-shaped sliding block 14. One end of the tension spring 112 is connected to the first pin 111, and the other end of the tension spring 112 is connected to the second pin 113. The tension spring 112 is always in a tension state, providing elastic tension. The side wall of the upper reference module 1 has two different pin holes, defined as a first position and a second position. The first pin 111 can be selectively inserted into one of the pin holes, and the two pin holes are located on the left and right sides of the second pin 113, respectively. By installing the first pin 111 in the first position or the second position, the positional relationship between the first pin 111 and the second pin 113 is changed, thereby changing the direction of the tension of the tension spring 112.
[0051] like Figures 4 to 6As shown, in a preferred embodiment, the side wall of the upper reference module 1 is provided with an opening with a cover plate 19. Both ends of the cover plate 19 are detachably connected to the edge screws of the opening. The left and right connecting screws of the cover plate 19 and the opening are the same size, so the cover plate 19 can still be installed on the opening even after its two ends are rotated 180° and their positions interchanged. The elastic element 11 includes a first pin 111, a tension spring 112, and a second pin 113. The first pin 111 is located at one end of the cover plate 19, and the second pin 113 is located on the outer wall of the slider, with the second pin 113 positioned near the middle of the cover plate 19. The two ends of the cover plate 19 are defined as the first end and the second end, and the two sides of the opening are defined as the first side and the second side. If the first pin 111 is located near the first end of the cover plate 19, then:
[0052] When the first end of the cover plate 19 is connected to the first side of the window and the second end of the cover plate 19 is connected to the second side of the window, the first pin 111 is located on the slider near the first side of the window, which is defined as the first position. At this time, the tension of the tension spring 112 is directed toward the first side of the window.
[0053] When the cover plate 19 rotates 180°, the first end of the cover plate 19 is connected to the second side of the window, and the second end of the cover plate 19 is connected to the first side of the window. Then the first pin 111 is located on the slider near the second side of the window, which is defined as the second position. At this time, the tension direction of the tension spring 112 is towards the second side of the window, which is opposite to the tension direction when the first pin 111 is in the first position.
[0054] In an alternative embodiment, the slider is a straight-bar type slider, and the measuring head 5 is mounted on the bottom of the straight-bar type slider. The upper reference module 1 has a rectangular cavity with a width greater than that of the straight-bar type slider. At least one side of the top and bottom walls of the rectangular cavity is provided with a slide rail 12 or a slide groove. The top and / or bottom sides of the straight-bar type slider are slidably connected to the slide rail 12 or slide groove on the corresponding side. The elastic element 11 consists of two springs located on the left and right sides of the straight-bar type slider, respectively. One end of the spring is connected to the side wall of the straight-bar type slider, and the other end of the spring is connected to the inner side wall of the rectangular cavity.
[0055] In this invention, the measuring head 5 includes a rod body 51 and a ball head 52. The top of the rod body 51 is provided with a regular polygonal interior corner groove, such as a pentagonal interior corner groove, a hexagonal interior corner groove, or an octagonal interior corner groove. The length of the measuring head 5 extending beyond the lower surface of both the upper reference module 1 and the lower reference module 2 is adjustable, as detailed below.
[0056] Adjust the measuring head 5 of the upper reference module 1:
[0057] The rod portion 51 of the measuring head 5 is connected to the slider. Specifically, the vertical portion of the L-shaped slider 14 is provided with a second vertical through hole 141, and the rod portion 51 of the measuring head 5 is threadedly connected to the second vertical through hole 141. The top of the upper reference module 1 is provided with a first vertical through hole 13, which connects to the vertical cavity inside the upper reference module 1. When the L-shaped slider 14 slides until the second vertical through hole 141 aligns with the first vertical through hole 13, a suitable polygonal wrench can be smoothly inserted from the first vertical through hole 13 into the second vertical through hole 141 to operate the regular polygonal inner corner groove of the rod portion 51 of the measuring head 5. In addition, the upper reference module 1 is provided with a first fastening bolt 15, which is perpendicular to the rod portion 51 of the measuring head 5. After adjusting the position of the measuring head 5, the first fastening bolt 15 can be tightened.
[0058] Adjust the measuring head 5 of the lower reference module 2:
[0059] The rod body 51 of the measuring head 5 is connected to the lower reference module 2. Specifically, the top of the lower reference module 2 has two bolt holes for installing knurled locking bolts 22, and the bottom of the lower reference module 2 has a third vertical through hole 23. The rod body 51 of the measuring head 5 is threadedly connected to the third vertical through hole 23, and the third vertical through hole 23 is vertically aligned with one of the bolt holes. After the lower reference module 2 is removed from the connecting rod 3 and the knurled locking bolts 22 are removed, a suitable polygonal wrench can be inserted from the bolt hole into the third vertical through hole 23 to operate the regular polygonal inner corner groove of the rod body 51 of the measuring head 5. In addition, the lower reference module 2 is provided with a second fastening bolt 24, which is perpendicular to the rod body 51 of the measuring head 5. After adjusting the position of the measuring head 5, the second fastening bolt 24 can be tightened.
[0060] like Figure 2 and Figure 4 As shown, in an optional embodiment, the bottom of the upper reference module 1 is provided with an upper reference pad 18, which has an elliptical hole. The elliptical hole provides movement space for the measuring head 5 of the upper reference module 1, through which the measuring head 5 of the upper reference module 1 passes. The bottom of the lower reference module 2 is provided with a lower reference pad 21, which has a circular hole through which the measuring head 5 of the lower reference module 2 passes. The upper and lower reference pads 21 serve as the base plates of the reference modules and also provide a flat lower surface for the reference modules. After long-term use, the reference pads can be removed for flatness calibration and maintenance, or the reference pads can be replaced.
[0061] In a preferred embodiment, the distance by which the ball head 52 of the measuring head 5 extends beyond the lower surface of the module is equal to the diameter of the ball head 52.
[0062] In an optional embodiment, the connecting rod 3 is a straight rod used for measuring individual flange workpieces. If necessary, extension rods 33 can be added to both ends of the straight rod. The extension rods 33 can be installed at the ends of the straight rod using the rod connecting block 34. Specifically, the rod connecting block 34 is provided with a through hole and several fastening holes. The end of the straight rod is inserted into the through hole from one side, and the end of the extension rod 33 is inserted into the through hole from the other side. Finally, several fastening bolts are inserted into the fastening holes and tightened to fix the two rods, the straight rod and the extension rod 33, in place.
[0063] In other alternative embodiments, the connecting rod 3 includes a U-shaped main rod 31 and secondary rods 32 connected to both sides of the U-shaped main rod 31. The U-shaped main rod 31 has a clearance space in the middle, which can be used in application scenarios where other equipment is located in the middle of the flange. (Refer to...) Figure 7 The auxiliary rods 32 on both sides of the U-shaped main rod 31 can also be equipped with extension rods 33, which are also installed through rod connecting blocks 34, and will not be described in detail here.
[0064] Finally, the method of using the radial measuring tool of this utility model is as follows (taking the measurement of a rectangular straight groove as an example):
[0065] 1. Measure the outer diameter of the trench;
[0066] Step A1: Check whether the movable direction of the measuring head 5A of the upper reference module 1 is facing the lower reference module 2. If not, rotate the installation direction of the cover plate 19 by 180° so that the measuring head 5A of the upper reference module 1 can be moved towards the lower reference module 2.
[0067] Step B1: Check the groove outer diameter value on the flange design drawing and adjust the length of the outer micrometer to the design outer diameter value;
[0068] Step C1: Move the measuring head 5A of the upper reference module 1 to the middle position of the movable distance, and place the outer side of the measuring head 5A against one of the contacts of the outside micrometer.
[0069] Step D1: Adjust the position of the lower reference module 2 on the connecting rod 3 so that the outer side of the measuring head 5B is pressed against another contact of the outside micrometer;
[0070] Step E1: Secure the lower reference module 2, and zero the dial indicator 4 of the upper reference module 1; remove the radial measuring tool from the outside micrometer.
[0071] Step F1: Place the radial measuring tool flat on the actual flange gasket 6. The outer side of the measuring head 5B of the lower reference module 2 first abuts against the outer wall of one side of the groove. Move the measuring head 5A of the upper reference module 1 to place it into the groove. At this time, the measuring head 5A abuts against the outer wall of the other side of the groove.
[0072] Step G1: Using the measuring head 5B as a fulcrum, move one end of the upper reference module 1 of the tool back and forth to find the reading on the dial indicator 4 that is closest to 0, and take it as the measured deviation value. When the reading of the dial indicator 4 is 0, it means that the outer diameter of the groove meets the design value. When the reading is a positive deviation, it means that the outer diameter of the groove is greater than the design value. When the reading is a negative deviation, it means that the outer diameter of the groove is less than the design value.
[0073] II. Measure the inner diameter of the trench;
[0074] Step A2: Check whether the movable direction of the measuring head 5A of the upper reference module 1 is outward away from the lower reference module 2. If not, rotate the installation direction of the cover plate 19 by 180° so that the measuring head 5A of the upper reference module 1 can be moved outward.
[0075] Step B2: Check the groove inner diameter value on the flange design drawing and adjust the length of the inner micrometer to the design inner diameter value;
[0076] Step C2: Move the measuring head 5A of the upper reference module 1 to the middle position of the movable distance, and place the inner side of the measuring head 5A against one of the contacts of the inside micrometer.
[0077] Step D2: Adjust the position of the lower reference module 2 on the connecting rod 3 so that the inside of the measuring head 5B is pressed against another contact of the inside micrometer;
[0078] Step E2: Secure the lower reference module 2, zero the dial indicator 4 of the upper reference module 1; remove the radial measuring tool from the inside micrometer.
[0079] Step F2: Place the radial measuring tool flat on the actual flange gasket 6. The inner side of the measuring head 5B of the lower reference module 2 first abuts against the inner wall of one side of the groove. Move the measuring head 5A of the upper reference module 1 to place it into the groove. At this time, the measuring head 5A abuts against the inner wall of the other side of the groove.
[0080] Step G2: Using the measuring head 5B as a fulcrum, move one end of the upper reference module 1 of the tool back and forth to find the reading on the dial indicator 4 that is closest to 0, and take it as the measured deviation value. When the dial indicator 4 reading is 0, it means that the inner diameter of the groove meets the design value. When the reading is a positive deviation, it means that the inner diameter of the groove is greater than the design value. When the reading is a negative deviation, it means that the inner diameter of the groove is less than the design value.
[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0082] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A radial measuring tool for a flange gasket groove, comprising an upper reference module, a lower reference module, and a connecting rod, wherein a measuring head is provided on the lower surface of both the upper and lower reference modules, characterized in that, The upper reference module is fixed to one end of the connecting rod, and the lower reference module is installed on the other end of the connecting rod and its position is adjustable. The upper reference module is equipped with a slider and an elastic element inside. The measuring head of the upper reference module is installed at the bottom of the slider. One end of the elastic element is connected to the slider, and the other end is connected to a first position or a second position on the inner wall of the upper reference module. In different connection positions, the force exerted by the elastic element on the slider is opposite. A dial indicator is provided on the outside of the upper reference module. The measuring rod of the dial indicator is inserted horizontally into the upper reference module, and the end probe of the measuring rod abuts against the slider and is in a compressed state.
2. The radial measuring tool for flange sealing gasket grooves according to claim 1, characterized in that, The measuring head includes a rod body and a ball head. The top of the rod body is provided with a regular polygonal inner corner groove. The rod body of the measuring head of the upper reference module is connected to the slider, and the rod body of the measuring head of the lower reference module is connected to the lower reference module. The distance by which the ball heads of the two reference modules extend out of the lower surface of the module is equal to the diameter of the ball head.
3. The radial measuring tool for flange sealing gasket grooves according to claim 1, characterized in that, The upper reference module has an L-shaped sliding cavity inside, including a vertical cavity and a horizontal cavity; the slider is an L-shaped sliding block; the horizontal cavity is provided with a slide rail, and the horizontal part of the L-shaped sliding block is slidably connected to the slide rail; The lateral width of the vertical cavity is greater than the thickness of the vertical portion of the L-shaped sliding block, and the difference determines the maximum sliding distance of the L-shaped sliding block, which is equal to the effective range of the radial measuring tool.
4. The radial measuring tool for flange sealing gasket grooves according to claim 3, characterized in that, The top of the upper reference module is provided with a first vertical through hole communicating with the vertical cavity, the vertical part of the L-shaped sliding block is provided with a second vertical through hole, the rod part of the measuring head is threadedly connected to the second vertical through hole, and the upper reference module is provided with a first fastening bolt for fastening the rod part.
5. The radial measuring tool for flange sealing gasket grooves according to claim 1, characterized in that, The upper reference module has an upper reference pad at its bottom, and the upper reference pad has an elliptical hole through which the measuring head of the upper reference module passes; the lower reference module has a lower reference pad at its bottom, and the lower reference pad has a circular hole through which the measuring head of the lower reference module passes.
6. The radial measuring tool for flange sealing gasket groove according to claim 1, characterized in that, The lower reference module is provided with a transverse through hole, and the end of the connecting rod passes through the transverse through hole. The lower reference module is also provided with two knurled locking bolts, which extend vertically through the transverse through hole and abut against the connecting rod to fasten the lower reference module to the connecting rod.
7. The radial measuring tool for flange sealing gasket grooves according to claim 6, characterized in that, The lower reference module has a third vertical through hole that connects to the horizontal through hole. The rod part of the measuring head of the lower reference module is threadedly connected to the third vertical through hole. The lower reference module is provided with a second fastening bolt for fastening the rod part.
8. The radial measuring tool for flange sealing gasket grooves according to claim 1, characterized in that, The elastic element includes a first pin, a tension spring, and a second pin; the side wall of the upper reference module is provided with a window with a cover plate, one end of the cover plate is provided with the first pin, the outer side wall of the slider is provided with the second pin, one end of the tension spring is connected to the first pin, and the other end of the tension spring is connected to the second pin. The first end of the cover plate is connected to the first side of the window, and the second end of the cover plate is connected to the second side of the window, so as to place the first pin in the first position; The first end of the cover plate is connected to the second side of the window, and the second end of the cover plate is connected to the first side of the window to place the first pin in the second position.
9. The radial measuring tool for flange sealing gasket grooves according to claim 1, characterized in that, The upper reference module is provided with a dial indicator mounting slot and a through hole located on the side wall of the dial indicator mounting slot. The upper reference module is also provided with two symmetrically distributed third fastening bolts perpendicular to the axis of the through hole. The third fastening bolts are used to fasten the dial indicator.
10. The radial measuring tool for flange sealing gasket groove according to claim 1, characterized in that, The connecting rod is a straight rod; or, the connecting rod includes a U-shaped main rod and auxiliary rods connected to both sides of the U-shaped main rod.