Flange hole center distance testing fixture

Abstract

The utility model discloses a flange hole center distance testing fixture, which is characterized in that an adjusting mechanism can move along a first square tube, a first indicating strip on a first indicating column can be seen through a first window, a center distance measuring scale is formed, and the center distance of a flange hole can be directly obtained. Each first indication strip is provided with a scale line area, a scale value area, a pressure value area and a pipe diameter area, accurate values can be directly obtained, the flange size can be adjusted according to pressure conditions and the pipe diameter of an adaptive pipeline, each first indication strip corresponds to one pressure value area, and when the flange hole center distance is measured, the measurement accuracy is improved. The device can directly display the adaptive pipe diameter, enables a user to rapidly obtain a detection structure, can adapt to flange plate detection under various pressure conditions, is wider in measurement range, and is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of detection measuring tools, in particular to a flange hole center distance detection tool. Background Art

[0002] The flange is a part that connects pipes. It includes a middle hole connected to the pipe and a flange hole for fitting bolts and nuts. After the flange is produced, the center distance of the flange holes needs to be measured. The conventional inspection method is to use a vernier caliper. After two measurements, the standard is checked for comparison to determine whether the product is qualified. In the patent "A Flange Hole Center Distance Inspection Tool" with announcement number CN206146352 U, it is stated that the positioning insert is inserted into the flange hole. If it can be inserted, it is qualified, and if it cannot be inserted, it is unqualified.

[0003] One type of inspection tool can only correspond to one type of flange. If the factory produces multiple types of flanges, multiple inspection tools need to be configured, which is inconvenient to measure multiple types of flanges. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a flange hole center distance inspection tool.

[0005] The utility model provides a flange hole center distance inspection tool, comprising:

[0006] The main measuring mechanism includes a first square tube, the first square tube extending in a first direction, first end caps provided at both ends of the first square tube, a first indicator column rotatably connected between the two first end caps, the first indicator column provided with a plurality of first indicator bars, a first window provided at the top end of the first square tube for observing the first indicator bars, and the first indicator column, each of the first indicator bars, and the first window all extending in the first direction;

[0007] Each of the first indicator bars includes a pressure value area, a scale value area, a scale line area, and a pipe diameter area arranged along the circumference of the first indicator column;

[0008] The adjusting mechanism comprises a rectangular ring slidably sleeved on the outside of the first square tube, a frustum is provided at the bottom of the rectangular ring, and the diameter of the cross-section circle of the frustum increases gradually from bottom to top.

[0009] According to the technical solution provided in the embodiment of the present application, first card slots are provided at both ends of the first indicator column, a first mounting hole is opened in the middle of the first end cover, and the arc-shaped inner wall of the first mounting hole fits with the arc-shaped inner wall of the first card slot.

[0010] According to the technical solution provided in the embodiment of the present application, the first square tube has a center point at the middle position along the first direction, and extension mechanisms are symmetrically installed at both ends of the first square tube about the center point, and the extension mechanisms are used to extend the measuring range.

[0011] According to the technical solution provided in the embodiment of the present application, the extension mechanism includes a second square tube connected to the first square tube, and a second indicator column connected to the first indicator column. The second indicator column is provided with a plurality of second indicator bars corresponding to each first indicator bar, and each second indicator bar also includes the pressure value area, the scale value area, the scale line area and the tube diameter area. The top end of the second square tube is provided with a second window for observing the second indicator bar.

[0012] According to the technical solution provided in the embodiment of the present application, the first end cover and the second end cover are both provided with rectangular edge grooves on the end face edges away from the center point, and the inner wall of the end of the second square tube away from the second end cover is arranged with a plurality of annular second limiting clips along the first direction, and the side wall of the rectangular edge groove is arranged with a plurality of annular first limiting clips along the first direction, and the second square tube is connected to the first end cover or the second end cover through the mutual cooperation of each first limiting clip and each second limiting clip.

[0013] According to the technical solution provided in the embodiment of the present application, the second indicator column and the first indicator column are both provided with a plurality of slots away from the center point end, and the second indicator column is provided with an insert block corresponding to each of the slots near the center point end, and the second indicator column is connected to the second indicator column or the first indicator column through the cooperation of each of the insert blocks and the corresponding slots.

[0014] According to the technical solution provided in the embodiment of the present application, a second mounting hole is provided in the middle of the second end cover, and a second card slot is provided at the end of the second indicator column away from the center point, and the arc-shaped inner wall of the second mounting hole fits with the arc-shaped inner wall of the second card slot.

[0015] According to the technical solution provided in the embodiment of the present application, a first rubber strip is provided at the middle of both end surfaces of the first square tube along the second direction, and a second rubber strip is provided at the middle of both end surfaces of each second square tube along the second direction, and the second direction is perpendicular to the first direction.

[0016] The middle parts of both ends of the rectangular ring along the second direction are threadedly connected with threaded knobs, and one end of the threaded knob abuts against the first rubber strip or the second rubber strip.

[0017] According to the technical solution provided in the embodiment of the present application, the adjacent end faces of the two rectangular rings are indicating surfaces, the center point corresponds to the first value of the scale numerical area, and after the two indicating surfaces are fitted together, the center distance between the two frustums is the first value.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The adjustment mechanism of the utility model can be moved along the first square tube, and the first indicator bar on the first indicator column can be seen through the first window, forming a center distance measuring ruler, which can directly obtain the center distance of the flange hole. The first indicator bar has a scale line area, a scale value area, a pressure value area and a pipe diameter area. Not only can the accurate value be directly obtained, but the flange size can also be adjusted according to the pressure condition and the diameter of the adapted pipe. Each first indicator bar corresponds to a pressure value area, and when measuring the center distance of the flange hole, the adapted pipe diameter will be directly displayed, so that the user can quickly obtain the detection structure, and can adapt to flange detection under various pressure conditions, with a wider measurement range and more convenient use.

[0020] Furthermore, an extension mechanism is provided, and the measuring length is increased through the second square tube, the second window and the plurality of second indicator strips, so as to facilitate the measurement of flanges of larger sizes. The plug-in block of the second indicator column is inserted into the slot of the first indicator column, and the first limit clip and the second limit clip cooperate to ensure the stability of the connection between the first indicator column and the second indicator column, and also ensure the stability of the connection between the first square tube and the second square tube during use. Furthermore, the number of extension mechanisms can be increased so that the plug-in block of the newly added second indicator column is inserted into the slot of another second indicator column, thereby further extending the measuring length and improving the adaptability of the detection device.

[0021] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 A schematic structural diagram of a flange hole center distance gauge provided in an embodiment of the present application;

[0024] Figure 2 A schematic cross-sectional view of a flange hole center distance gauge provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 A partial enlarged schematic diagram of area A in the middle;

[0026] Figure 4 A schematic diagram of the exploded structure of a flange hole center distance gauge provided in an embodiment of the present application;

[0027] Figure 5 This is a schematic structural diagram of a first indicator bar in a flange hole center distance gauge provided in an embodiment of the present application.

[0028] Numbers in the figure:

[0029] 1. Main measuring mechanism; 11. First square tube; 12. First window; 13. First end cap; 14. First mounting hole; 15. First indicator column; 16. First slot; 17. First indicator bar; 171. Scale line area; 172. Scale value area; 173. Pressure value area; 174. Pipe diameter area;

[0030] 2. Adjustment mechanism; 21. Threaded knob; 22. Rectangular ring; 23. Connecting rod; 24. Round table;

[0031] 3. Extension mechanism; 31. Second square tube; 32. Second window; 33. Second end cap; 34. Second mounting hole; 35. Second indicator column; 36. Second slot; 37. Second indicator bar; 38. Insert block; 39. Slot;

[0032] 41. Rectangular side groove; 42. First limit clip; 43. Second limit clip;

[0033] 51. First rubber strip; 52. Second rubber strip. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Please refer to Figures 1 to 5 The embodiment of the present utility model provides a flange hole center distance detection tool, comprising:

[0037] The main measuring mechanism 1 includes a first square tube 11, the extension direction of the first square tube 11 is a first direction, and first end caps 13 are provided at both ends of the first square tube 11. A first indicator column 15 is rotatably connected between the two first end caps 13. The first indicator column 15 is provided with a plurality of first indicator bars 17. The top of the first square tube 11 is provided with a first window 12 for observing the first indicator bars 17. The first indicator column 15, each of the first indicator bars 17 and the first window 12 all extend in the first direction. The first direction is Figure 1 Left and right directions in

[0038] Each of the first indicator bars 17 includes a pressure value area 173, a scale value area 172, a scale line area 171 and a pipe diameter area 174 arranged circumferentially along the first indicator column 15; wherein, reference Figure 5 The scale line area 171 is an area with several scale lines, and the scale value area 172 is used to mark the values corresponding to some scale lines. The pressure value area 173 marks the pressure value, that is, the pressure condition corresponding to the first indicator bar 17, and the pipe diameter area 174 marks the corresponding pipe diameter values of flanges of different sizes under the current pressure conditions, that is, the flange model. Therefore, not only can the parameters of the flange hole center distance be read through the scale value area 172 and the scale line area 171, but also whether the flange hole center distance to be tested meets the national standard can be accurately understood. By switching the first indicator bar 17, different pressure conditions can be changed, which facilitates quick detection by users without having to search from the standard.

[0039] The adjusting mechanism 2 includes a rectangular ring 22 that is slidably mounted on the outside of the first square tube 11. A frustum 24 is provided at the bottom end of the rectangular ring 22. The diameter of the cross-sectional circle of the frustum 24 gradually increases from bottom to top, so that the bottom end of the frustum 24 can fit into the flange hole, and then the center distance between the two frustums 24 is the center distance of the flange holes. In conjunction with the first indicator bar 17, a center distance measuring ruler is formed to facilitate rapid measurement of the center distance between the two flange holes. In addition, the frustum 24 and the rectangular ring 22 are connected by a connecting rod 23 to avoid interference between the first square tube 11 and the flange during measurement.

[0040] In some embodiments, the adjacent end surfaces of the two rectangular rings 22 are indicator surfaces, the center point corresponds to the first value of the scale value area 172, and after the two indicator surfaces are attached, the center distance between the two frustums 24 is the first value;

[0041] like Figure 1 and Figure 5As shown, after the two rectangular rings 22 are fitted together, the measurable center distance is not zero, but is counted from the first value; optionally, the spacing between adjacent scale lines is 0.5 mm, and the scale value area 172 is symmetrically arranged with the first value of the center point as the center, so the actual spacing is multiplied by two as the marked size of the scale value area 172. When a flange that meets the standard is measured, the two indicating surfaces correspond to two identical marked sizes, and the flange hole diameter size can be directly read; further preferably, a first indicator bar 17 corresponds to a pressure condition, for example, the pressure value area 173 of a first indicator bar 17 is marked PN10, and the flange models under this pressure condition include DN10, DN15, DN20, ..., and the corresponding flange hole center distance size is obtained by querying the national standard, and the corresponding model is marked in the pipe diameter area 174 according to the marked size of the scale value area 172, so as to facilitate faster proofreading and detection.

[0042] In some embodiments, first slots 16 are provided at both ends of the first indicator column 15, and a first mounting hole 14 is provided in the middle of the first end cover 13, and the arc-shaped inner wall of the first mounting hole 14 fits with the arc-shaped inner wall of the first slot 16;

[0043] refer to Figure 4 By limiting the first mounting hole 14 and the first card slot 16 , the first indicator column 15 is ensured to rotate stably without left or right deviation. Furthermore, the first indicator column 15 located on the inner side of the first square tube 11 is a parameter portion for pasting the first indicator strip 17 , while the first indicator column 15 located on the outer side of the first square tube 11 is a knob portion for facilitating the user to rotate the first indicator column 15 .

[0044] In some embodiments, the first square tube 11 has a center point at the middle position along the first direction, and the two ends of the first square tube 11 are symmetrically installed with extension mechanisms 3 about the center point, and the extension mechanisms 3 are used to extend the measurement range; Figure 1 and Figure 4 As the diameter of the adapted pipe increases, the corresponding flange will also increase, and then the corresponding flange hole center distance will also increase. The measuring range is increased by lengthening the mechanism 3, and more flanges can be adapted, making the measuring range wider.

[0045] In some embodiments, the extension mechanism 3 includes a second square tube 31 connected to the first square tube 11, and a second indicator column 35 connected to the first indicator column 15. The second indicator column 35 is provided with a plurality of second indicator bars 37 corresponding to each first indicator bar 17. Each second indicator bar 37 also includes the pressure value area 173, the scale value area 172, the scale line area 171, and the tube diameter area 174. The top of the second square tube 31 is provided with a second window 32 for observing the second indicator bars 37.

[0046] like Figure 1 、 Figure 2 and Figure 4 As shown, the marking method and marking size of each second indicator bar 37 correspond one-to-one with each first indicator bar 17, and are based on the first numerical value of the center point, playing an extension role. When in use, the rectangular ring 22 can move along the first square tube 11 and the second square tube 31, and rotating the second indicator column 35 can drive the first indicator column 15 to rotate, thereby achieving the purpose of adjustment and measurement.

[0047] In some embodiments, a rectangular side groove 41 is provided on the end surface edge of each of the first end cap 13 and the second end cap 33 away from the center point. A plurality of annular second limiting clips 43 are arranged along the first direction on the inner wall of the end of the second square tube 31 away from the second end cap 33. A plurality of annular first limiting clips 42 are arranged along the first direction on the side wall of the rectangular side groove 41. The second square tube 31 is connected to the first end cap 13 or the second end cap 33 through the mutual cooperation of each first limiting clip 42 and each second limiting clip 43.

[0048] like Figure 3 and Figure 4 As shown, the second limiting clip 43 is a rectangular ring with a semicircular cross-section, and its diameter surface is attached to the inner wall of the second square tube 31. Similarly, the first limiting clip 42 is a rectangular ring with a semicircular cross-section, and its diameter surface is attached to the side wall of the rectangular edge groove 41; optionally, along the first direction, that is, the left and right direction, each first limiting clip 42 arranged in the middle is clamped between two adjacent second limiting clips 43, and each second limiting clip 43 arranged in the middle is clamped into two adjacent first limiting clips 42, forming a staggered clamping effect, thereby achieving the purpose of connecting the second square tube 31 with the first end cover 13 or the second end cover 33, and improving stability.

[0049] In some embodiments, the second indicator post 35 and the first indicator post 15 are both provided with a plurality of slots 39 at ends away from the center point, and the second indicator post 35 is provided with an insert block 38 corresponding to each slot 39 near the center point. The second indicator post 35 is connected to the second indicator post 35 or the first indicator post 15 through the cooperation of each insert block 38 and the corresponding slot 39.

[0050] like Figure 4As shown, the plug block 38 is inserted into the corresponding slot 39 to realize the connection between the second indicator column 35 and the first indicator column 15, and then the first indicator column 15 can be driven to rotate by rotating the second indicator column 35 to achieve the purpose of adjustment; optionally, the plug blocks 38 are evenly arranged on the edge of the end face of the second indicator column 35 to improve the stability of the connection; in addition, since the second end cover 33 is also provided with a rectangular side groove 41, the second square tube 31 can be further installed on the basis of the second square tube 31. Similarly, the second indicator column 35 is also provided with a slot 39 at the end away from the plug block 38, and the plug-in connection between the two second indicator columns 35 is also realized. It is only necessary to adjust the parameters marked on the newly added second indicator bar 37, thereby further increasing the measurement range.

[0051] In some embodiments, a second mounting hole 34 is provided in the middle of the second end cover 33, and a second slot 36 is provided at an end of the second indicator column 35 away from the center point, and the arc-shaped inner wall of the second mounting hole 34 fits with the arc-shaped inner wall of the second slot 36;

[0052] refer to Figure 4 By limiting the second mounting hole 34 and the second card slot 36 , the second indicator column 35 can rotate stably without any left or right deviation. Furthermore, the inner portion of the second indicator column 35 located on the second square tube 31 is a parameter portion for pasting the second indicator strip 37 , while the outer portion of the second indicator column 35 located on the second square tube 31 is a knob portion for facilitating the user to rotate the second indicator column 35 .

[0053] In some embodiments, a first rubber strip 51 is provided at the middle of both end surfaces of the first square tube 11 along the second direction, and a second rubber strip 52 is provided at the middle of both end surfaces of each second square tube 31 along the second direction, and the second direction is perpendicular to the first direction.

[0054] The middle parts of both ends of the rectangular ring 22 along the second direction are both threadedly connected with a threaded knob 21, and one end of the threaded knob 21 abuts against the first rubber strip 51 or the second rubber strip 52;

[0055] like Figure 1 and Figure 4 As shown, one end of the threaded knob 21 abuts against the first rubber strip 51 or the second rubber strip 52, so that the abutment has a high static friction force, thereby achieving the purpose of fixing the rectangular ring 22. When testing the flange of the same model, no secondary adjustment is required. In addition, the threaded knob 21 can be rotated to disengage the threaded knob 21 through the action of the thread, and no longer abuts against the first rubber strip 51 or the second rubber strip 52, so that the rectangular ring 22 can be adjusted at will.

[0056] The utility model has two detection methods, which are as follows:

[0057] The first detection method is used to detect a large number of flanges of the same model. According to the model of the flange to be measured and the pressure conditions of the application, the first indicator column 15 is rotated, and the first indicator bar 17 of the corresponding pressure adjustment is observed through the first window 12. Then, according to the marking of the pipe diameter area 174, the rectangular ring 22 is pushed to move along the first square tube 11 or the second square tube 31. Since the same model is symmetrically marked on both sides of the center point, the two indicating surfaces are aligned with the corresponding marked model. Then, the threaded knob 21 is rotated, and the threaded knob 21 abuts against the first rubber strip 51 or the second rubber strip 52 to achieve a locking effect. Then, the measurement can be carried out, and the two frustums 24 are placed in the corresponding flange holes. If it meets the standard, the two frustums 24 are placed in the corresponding flange holes smoothly without tilting or shaking. Similarly, if it does not meet the standard, the two frustums 24 may not be able to be placed in the corresponding flange holes, or there will be obvious tilting and shaking after placement.

[0058] The second detection method is used for small-scale random inspections. It is necessary to first operate the threaded knob 21 so that the threaded knob 21 does not abut the first rubber strip 51 or the second rubber strip 52, and the rectangular ring 22 moves along the first square tube 11 or the second square tube 31. The positions of the two frustums 24 are adjusted so that the two frustums 24 are stably placed in the corresponding flange holes. The rectangular ring 22 is kept stationary, and the first square tube 11 or the second square tube 31 is moved. The model corresponding to the flange in the pipe diameter area 174 is observed. Since the same model is symmetrically marked on both sides of the center point, one indicating surface is aligned with a marked model. If the other indicating surface is also aligned with the other marked model, it means that the flange meets the standard. If not aligned, it does not meet the marking. Furthermore, the first square tube 11 or the second square tube 31 can be continued to be moved so that the two indicating surfaces are aligned with the same numerical parameters in the scale numerical area 172 to obtain the spacing parameters of the flange hole center distance, which is convenient for subsequent adjustment.

[0059] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0060] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A flange hole center distance inspection tool, characterized in that: include: The main measuring mechanism (1) comprises a first square tube (11), wherein the extending direction of the first square tube (11) is a first direction, first end caps (13) are provided at both ends of the first square tube (11), a first indicator column (15) is rotatably connected between the two first end caps (13), a plurality of first indicator bars (17) are provided on the first indicator column (15), a first window (12) for observing the first indicator bars (17) is provided at the top end of the first square tube (11), and the extending directions of the first indicator column (15), each of the first indicator bars (17) and the first window (12) are all in the first direction; Each of the first indicator bars (17) comprises a pressure value area (173), a scale value area (172), a scale line area (171), and a pipe diameter area (174) arranged circumferentially along the first indicator column (15); The regulating mechanism (2) comprises a rectangular ring (22) slidably sleeved outside the first square tube (11), a frustum (24) being provided at the bottom end of the rectangular ring (22), and the cross-sectional diameter of the frustum (24) gradually increasing from bottom to top.

2. The flange hole center distance gauge according to claim 1, characterized in that: The first indicator column (15) is provided with first slots (16) at both ends, the first end cover (13) is provided with a first mounting hole (14) in the middle, and the arc-shaped inner wall of the first mounting hole (14) fits with the arc-shaped inner wall of the first slot (16).

3. The flange hole center distance gauge according to claim 2, characterized in that: The first square tube (11) has a center point at a middle position along the first direction, and extension mechanisms (3) are symmetrically installed at both ends of the first square tube (11) about the center point, and the extension mechanisms (3) are used to extend the measurement range.

4. The flange hole center distance gauge according to claim 3, characterized in that: The extension mechanism (3) comprises a second square tube (31) connected to the first square tube (11), and a second indicator column (35) connected to the first indicator column (15); the second indicator column (35) is provided with a plurality of second indicator bars (37) corresponding to each of the first indicator bars (17); each of the second indicator bars (37) also comprises the pressure value area (173), the scale value area (172), the scale line area (171) and the tube diameter area (174); and a second window (32) is provided at the top end of the second square tube (31) for observing the second indicator bars (37).

5. The flange hole center distance gauge according to claim 4, characterized in that: The first end cover (13) and the second end cover (33) are both provided with rectangular side grooves (41) on their end face edges away from the center point; the inner wall of the end of the second square tube (31) away from the second end cover (33) is provided with a plurality of annular second limiting clips (43) arranged along the first direction; the side wall of the rectangular side groove (41) is provided with a plurality of annular first limiting clips (42) arranged along the first direction; the second square tube (31) is connected to the first end cover (13) or the second end cover (33) through the mutual cooperation of each first limiting clip (42) and each second limiting clip (43).

6. The flange hole center distance gauge according to claim 5, characterized in that: The second indicator column (35) and the first indicator column (15) are both provided with a plurality of slots (39) at ends away from the center point, and the second indicator column (35) is provided with an insert block (38) corresponding to each of the slots (39) near the center point. The second indicator column (35) is connected to the second indicator column (35) or the first indicator column (15) through the cooperation of each of the insert blocks (38) and the corresponding slots (39).

7. The flange hole center distance gauge according to claim 6, characterized in that: A second mounting hole (34) is provided in the middle of the second end cover (33), a second clamping groove (36) is provided at the end of the second indicator column (35) away from the center point, and the arc-shaped inner wall of the second mounting hole (34) fits with the arc-shaped inner wall of the second clamping groove (36).

8. The flange hole center distance gauge according to claim 4, characterized in that: The first square tube (11) is provided with a first rubber strip (51) at the middle of both end surfaces along the second direction, and each second square tube (31) is provided with a second rubber strip (52) at the middle of both end surfaces along the second direction, and the second direction is perpendicular to the first direction. The middle parts of both ends of the rectangular ring (22) along the second direction are both threadedly connected to a threaded knob (21), and one end of the threaded knob (21) abuts against the first rubber strip (51) or the second rubber strip (52).

9. The flange hole center distance measuring tool according to claim 4, characterized in that: The adjacent end surfaces of the two rectangular rings (22) are indicating surfaces, the center point corresponds to the first value of the scale value area (172), and after the two indicating surfaces are attached, the center distance between the two frustums (24) is the first value.

Images