Pipe seam anchor rod drilling size measuring device

Abstract

The utility model provides a pipe seam anchor rod drilling size measuring device, and belongs to the field of pipe seam anchor rod drilling size measurement, the pipe seam anchor rod drilling size measuring device comprises two groups of triangular fixers and a connecting rod, and the two groups of triangular fixers are connected through the connecting rod; wherein the triangular fixer comprises a first fixing rod, a second fixing rod and a telescopic rod, the first fixing rod, the second fixing rod and the telescopic rod are sequentially hinged end to end, and the connecting rod is arranged at the hinged part among the first fixing rod, the second fixing rod and the telescopic rod; the expansion angle between the first fixing rod and the second fixing rod is adjusted by adjusting the elongation of the telescopic rod, so that the three corners of the triangular fixator abut against the inner wall of the anchor rod, data of the included angle between the first fixing rod and the second fixing rod at the moment is obtained, and the inner diameter of the anchor rod is calculated through the data of the included angle. And calculating the anchoring force of the anchor rod to the surrounding rock according to a formula.

Description

Technical Field

[0001] The present application relates to the technical field of pipe seam anchor hole size measurement, and in particular to a pipe seam anchor hole size measurement device. Background Art

[0002] When installing an anchor, a hole is first drilled in the surrounding rock, and then the anchor is driven into the hole using the impact of the drill. The borehole diameter is generally slightly smaller than the anchor diameter. During the process of being driven into the borehole, the anchor rod body is squeezed and deformed, and the rod diameter is reduced. After the anchor rod body is completely inserted into the borehole, the outer diameter of the anchor rod body is finally the same as the borehole diameter. As the anchor rod body diameter is reduced, the anchor rod is squeezed and deformed, creating a resistance force against the borehole. This resistance force is the initial support force of the pipe seam anchor on the surrounding rock, or the initial anchoring force. After a period of anchor construction, as the surrounding rock continues to deform, the borehole diameter and anchor rod diameter also change, which ultimately manifests as a change in the anchoring force of the anchor on the surrounding rock. Therefore, there is an urgent need for a pipe seam anchor drilling size measurement device that can detect the anchoring force of the anchor on the surrounding rock in order to understand the actual changes in the anchoring force of the pipe seam anchor. Utility Model Content

[0003] In view of the technical problems existing in the background technology, the present application provides a pipe seam anchor hole size measuring device, which adjusts the angle between the first fixed rod and the second fixed rod through a telescopic rod, and calculates the inner diameter of the anchor rod through the angle between the first fixed rod and the second fixed rod, thereby calculating the anchoring force of the anchor rod on the surrounding rock.

[0004] In a first aspect, an embodiment of the present application provides a device for measuring the size of a pipe seam anchor borehole, comprising: two sets of triangular fixers and connecting rods, wherein the two sets of triangular fixers are connected by the connecting rod;

[0005] Wherein, the triangular fixer includes a first fixing rod, a second fixing rod and a telescopic rod, the first fixing rod, the second fixing rod and the telescopic rod are hinged end to end in sequence, and the connecting rod is arranged at the hinge part between the first fixing rod, the second fixing rod and the telescopic rod.

[0006] In the technical solution of the embodiment of the present application, by adjusting the elongation of the telescopic rod and thus the expansion angle between the first fixed rod and the second fixed rod, the three corners of the triangular fixer are made close to the inner wall of the anchor rod, and the angle data between the first fixed rod and the second fixed rod at this time is obtained. The inner diameter of the anchor rod is calculated based on the angle data, and the anchoring force of the anchor rod on the surrounding rock is calculated according to the formula.

[0007] In some embodiments, the telescopic rod includes a first telescopic rod, a second telescopic rod and a first fixing device, the first end of the first telescopic rod is hinged to the first fixing rod, the first end of the second telescopic rod is hinged to the second fixing rod, the second end of the first telescopic rod extends from the second end of the second telescopic rod into the second telescopic rod and is slidably connected to the second telescopic rod, and the first fixing device is arranged at the second end of the second telescopic rod for controlling the relative sliding between the first telescopic rod and the second telescopic rod.

[0008] In this embodiment, the extension amounts of the first telescopic rod and the second telescopic rod are adjusted so that the three corners of the triangular fixer can be close to the inner wall of the anchor rod, and the first fixing device is controlled to prevent the first telescopic rod and the second telescopic rod from sliding relative to each other during subsequent use, thereby increasing the accuracy of the angle measurement between the first fixing rod and the second fixing rod.

[0009] In some embodiments, the telescopic rod further includes a first spring member, which is disposed in the second telescopic rod. One end of the first spring member abuts against the second telescopic rod, and the other end abuts against the second end of the first telescopic rod.

[0010] In this embodiment, the first telescopic rod and the second telescopic rod are automatically extended under the action of the first spring member, so that the three corners of the triangular fixer can automatically close to the inner wall of the anchor rod under the action of the first spring member, greatly reducing the difficulty of use for users.

[0011] In some embodiments, the first fixing device includes a first cam, a first handle and a supporting block. The second end of the second telescopic rod is provided with an opening, and the supporting block is movably arranged in the opening. The first cam is rotatably arranged at the second end of the second telescopic rod. The first handle is fixedly connected to the side wall of the first cam, and when the first cam is driven to rotate by the first handle, the first cam pushes the supporting block to resist the side wall of the first telescopic rod.

[0012] In this embodiment, the first cam is rotated by the first handle to switch the first cam between the sliding state and the locking state, thereby controlling the relative sliding between the first telescopic rod and the second telescopic rod, further reducing the user's operating difficulty.

[0013] In some embodiments, an angle ruler is further included. The angle ruler is set on the first fixing rod and is used to measure the angle between the first fixing rod and the second fixing rod.

[0014] In this embodiment, the angle between the first fixing rod and the second fixing rod can be measured more conveniently by using an angle ruler, thereby further reducing the difficulty of using the pipe seam anchor drilling size measuring device.

[0015] In some embodiments, the connecting rod includes a first connecting rod, a second connecting rod and a second fixing device. The first connecting rod and the second connecting rod are distributed and connected to a group of triangular fixers. The first connecting rod extends from the end of the second connecting rod into the second connecting rod and is slidably connected to the second connecting rod. The second fixing rod is set on the first connecting rod for controlling the relative sliding between the first connecting rod and the second connecting rod.

[0016] In this embodiment, the expansion and contraction amount between the first connecting rod and the second connecting rod is adjusted by the second fixing device, thereby enabling the pipe seam anchor drilling size measuring device to adapt to drilling holes of different depths.

[0017] In some embodiments, the second fixing device includes a slider, a second eccentric wheel and a rotating rod. A cavity is provided in the first connecting rod, and a sliding groove is also provided on the side wall of the first connecting rod. The sliding groove is connected to the cavity. The second eccentric wheel is arranged in the cavity. One end of the rotating rod is connected to the eccentric of the second eccentric wheel, and the other end of the rotating rod extends from the end of the first connecting rod connected to the triangular fixer. The slider is slidably set in the sliding groove and contacts the side wall of the second eccentric wheel. When the second eccentric wheel is driven to rotate by the rotating rod, the second eccentric wheel pushes the slider to resist the inner wall of the first connecting rod.

[0018] In this embodiment, the second eccentric wheel is driven to rotate by the rotating rod. During the rotation of the second eccentric wheel, the side wall of the second eccentric wheel can push the slider to slide, and enable the slider to abut against the inner wall of the first connecting rod, thereby controlling the relative sliding between the first connecting rod and the second connecting rod.

[0019] In some embodiments, the second fixing device further includes a second handle, and the second handle is disposed at an end of the rotating rod extending out of the first connecting rod.

[0020] In this embodiment, the second handle greatly reduces the difficulty of operating the pipe seam anchor drilling size measuring device.

[0021] In some embodiments, the outer side wall of the first connecting rod is provided with scale lines.

[0022] In this embodiment, the depth to which the device is inserted into the borehole can be measured by the scale lines.

[0023] In some embodiments, a connecting piece is further included, and the first fixing rod, the second fixing rod, the telescopic rod and the connecting rod are detachably connected through the connecting piece.

[0024] In this embodiment, the first fixing rod, the second fixing rod, the telescopic rod and the connecting rod are detachably connected via the connecting rod, so that the pipe seam anchor rod drilling size measuring device is more convenient to carry.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings used in this application. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0027] Figure 1 This is a schematic structural diagram of a device for measuring the size of a pipe seam anchor borehole in an embodiment of the present application;

[0028] Figure 2 This is a transverse cross-sectional view of the telescopic rod in the embodiment of the present application;

[0029] Figure 3 A longitudinal cross-sectional view of the telescopic rod in an embodiment of the present application;

[0030] Figure 4 2 is a cross-sectional view of the connecting rod in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. First fixed rod; 2. Second fixed rod; 3. Telescopic rod; 31. First telescopic rod;

[0033] 32. Second telescopic rod; 33. First fixing device; 34. First spring member; 35. First cam;

[0034] 36. First handle; 37. Abutment block; 38. Opening; 4. Connecting rod; 41. First connecting rod;

[0035] 42. Second connecting rod; 43. Second fixing device; 44. Slider; 45. Second eccentric wheel;

[0036] 46. ​​Rotating rod; 47. Cavity; 48. Slide; 49. Second handle; 5. Angle ruler;

[0037] 6. Connectors. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0046] When installing an anchor, a hole is first drilled in the surrounding rock, and then the anchor is driven into the hole using the impact of the drill. The borehole diameter is generally slightly smaller than the anchor diameter. During the process of being driven into the borehole, the anchor rod body is squeezed and deformed, and the rod diameter is reduced. After the anchor rod body is completely inserted into the borehole, the outer diameter of the anchor rod body is finally the same as the borehole diameter. As the anchor rod body diameter is reduced, the anchor rod is squeezed and deformed, creating a resistance force against the borehole. This resistance force is the initial support force of the pipe seam anchor on the surrounding rock, or the initial anchoring force. After a period of anchor construction, as the surrounding rock continues to deform, the borehole diameter and anchor rod diameter also change, which ultimately manifests as a change in the anchoring force of the anchor on the surrounding rock. Therefore, there is an urgent need for a pipe seam anchor drilling size measurement device that can detect the anchoring force of the anchor on the surrounding rock in order to understand the actual changes in the anchoring force of the pipe seam anchor.

[0047] In order to solve the technical problem of how to provide a pipe seam anchor hole size measuring device that can detect the anchoring force of the anchor rod on the surrounding rock to grasp the actual change of the anchoring force of the pipe seam anchor rod, the present application provides a pipe seam anchor hole size measuring device, which adjusts the angle between the first fixed rod 1 and the second fixed rod 2 through the telescopic rod 3, and calculates the inner diameter of the anchor rod through the angle between the first fixed rod 1 and the second fixed rod 2, so that the anchoring force of the anchor rod on the surrounding rock can be calculated.

[0048] Please refer to Figure 1 , Figure 1This is a structural schematic diagram of a pipe seam anchor drilling size measuring device provided in an embodiment of the present application. The pipe seam anchor drilling size measuring device includes two sets of triangular fixers and a connecting rod 4, and the two sets of triangular fixers are connected by a connecting rod 4; wherein, the triangular fixer includes a first fixing rod 1, a second fixing rod 2 and a telescopic rod 3, and the first fixing rod 1, the second fixing rod 2 and the telescopic rod 3 are hinged end to end in sequence, and the connecting rod 4 is arranged at the hinge portion between the first fixing rod 1, the second fixing rod 2 and the telescopic rod 3.

[0049] Specifically, during use, the pipe seam anchor drilling size measuring device is extended into the appropriate position of the drill hole. By adjusting the extension of the telescopic rod 3 and the expansion angle between the first fixing rod 1 and the second fixing rod 2, the three corners of the triangular fixer are close to the inner wall of the anchor rod. The angle data between the first fixing rod 1 and the second fixing rod 2 at this time is obtained. The inner diameter of the anchor rod is calculated based on this angle data, and the anchoring force of the anchor rod to the surrounding rock is calculated according to the formula. The specific formula is as follows:

[0050]

[0051] r2=r+t+t0 (2)

[0052] Wherein, r is the inner radius of the pipe seam anchor after installation, m is half the length of the first fixing rod 1 or the second fixing rod 2 (it should be noted that in this application, the lengths of the first fixing rod 1 and the second fixing rod 2 are the same), α is the angle between the first fixing rod 1 and the second fixing rod 2, r2 is the outer radius of the pipe seam anchor after installation, that is, the drilling radius, t is the anchor wall thickness, and t0 is the radius of the hinge;

[0053] The radial force of the anchor rod on the borehole, that is, the supporting force of the anchor rod per unit length on the borehole, p is:

[0054]

[0055] Among them, r1 is the outer radius of the pipe seam anchor before installation, E b is the elastic modulus of the anchor, I=t 3 / 12 is the section moment of inertia of the anchor bolt unit per unit length, and θ0 is the opening angle of the pipe-seam anchor bolt before installation.

[0056] It should be noted that radial support force is a key parameter for calculating the frictional force experienced by an anchor bolt during pullout, and is also a crucial indicator for measuring the anchoring force of the anchor bolt to the surrounding rock during rock movement. Therefore, by measuring the inner diameter of the anchor bolt after installation and calculating the support force of the anchor bolt on the surrounding rock of the borehole from this diameter, the anchor bolt's anchoring force to the surrounding rock can be determined.

[0057] Further, please refer to Figure 2In the embodiment of the present application, the telescopic rod 3 includes a first telescopic rod 31, a second telescopic rod 32, and a first fixing device 33. The first end of the first telescopic rod 31 is hinged to the first fixing rod 1, and the first end of the second telescopic rod 32 is hinged to the second fixing rod 2. The second end of the first telescopic rod 31 extends from the second end of the second telescopic rod 32 into the second telescopic rod 32 and is slidably connected to the second telescopic rod 32. The first fixing device 33 is disposed at the second end of the second telescopic rod 32 and is used to control the relative sliding between the first telescopic rod 31 and the second telescopic rod 32. During use, the extension of the first telescopic rod 31 and the second telescopic rod 32 is adjusted so that the three corners of the triangular fixer can be close to the inner wall of the anchor rod. The first fixing device 33 is controlled to prevent the first telescopic rod 31 and the second telescopic rod 32 from sliding relative to each other during subsequent use, thereby increasing the accuracy of the angle measurement between the first fixing rod 1 and the second fixing rod 2.

[0058] Further, please refer to Figure 3 In this embodiment of the present application, the telescopic rod 3 further includes a first spring member 34, which is disposed within the second telescopic rod 32. One end of the first spring member 34 abuts the second telescopic rod 32, while the other end abuts the second end of the first telescopic rod 31. During use, the first and second telescopic rods 31, 32 are automatically extended by the first spring member 34. This automatically forces the three corners of the triangular fixture to abut against the inner wall of the anchor rod, significantly reducing user complexity.

[0059] Furthermore, in the embodiment of the present application, the first fixing device 33 includes a first cam 35, a first handle 36 and a supporting block 37. The second end of the second telescopic rod 32 is provided with an opening 38, and the supporting block 37 is movably arranged in the opening 38. The first cam 35 is rotatably arranged at the second end of the second telescopic rod 32. The first handle 36 is fixedly connected to the side wall of the first cam 35, and when the first cam 35 is driven to rotate by the first handle 36, the first cam 35 pushes the supporting block 37 to resist the side wall of the first telescopic rod 31. Specifically, the first cam 35 has two states, namely a sliding state and a locked state. When the first cam 35 is in the sliding state, the side wall of the first cam 35 has no force on the abutting block 37, and when the first cam 35 is in the locked state, the first cam 35 abuts against the abutting block 37, so that the abutting block 37 presses the outer wall of the first telescopic rod 31, thereby preventing the first telescopic rod 31 and the second telescopic rod 32 from sliding relative to each other. Therefore, during use, the first cam 35 is rotated by the first handle 36 to switch the first cam 35 between the sliding state and the locked state, thereby controlling the relative sliding between the first telescopic rod 31 and the second telescopic rod 32, further reducing the user's operation difficulty.

[0060] Furthermore, in the embodiment of the present application, an angle ruler 5 is also included. The angle ruler 5 is arranged on the first fixed rod 1. The angle between the first fixed rod 1 and the second fixed rod 2 can be measured more conveniently through the angle ruler 5, further reducing the difficulty of using the pipe seam anchor drilling size measuring device.

[0061] Further, please refer to Figure 4 In the embodiment of the present application, the connecting rod 4 includes a first connecting rod 41, a second connecting rod 42 and a second fixing device 43. The first connecting rod 41 and the second connecting rod 42 are distributed and connected with a group of triangular fixers. The first connecting rod 41 extends into the second connecting rod 42 from the end of the second connecting rod 42 and is slidably connected to the second connecting rod 42. The second fixing device 43 is arranged on the first connecting rod 41, and is used to control the relative sliding between the first connecting rod 41 and the second connecting rod 42. The expansion and contraction amount between the first connecting rod 41 and the second connecting rod 42 is adjusted by the second fixing device 43, so that the pipe seam anchor drilling size measuring device can adapt to drilling holes of different depths.

[0062] Furthermore, in the embodiment of the present application, the second fixing device 43 includes a slider 44, a second eccentric wheel 45 and a rotating rod 46. A cavity 47 is provided in the first connecting rod 41, and a slide groove 48 is also provided on the side wall of the first connecting rod 41. The slide groove 48 is connected to the cavity 47. The second eccentric wheel 45 is arranged in the cavity 47. One end of the rotating rod 46 is connected to the eccentric of the second eccentric wheel 45. The other end of the rotating rod 46 extends from the end of the first connecting rod 41 connected to the triangular fixer. The slider 44 is slidably set in the slide groove 48 and contacts the side wall of the second eccentric wheel 45. During use, the second eccentric wheel 45 is driven to rotate by the rotating rod 46. When the second eccentric wheel 45 rotates, the side wall of the second eccentric wheel 45 can push the slider 44 to slide, and enable the slider 44 to abut against the inner wall of the first connecting rod 41, thereby controlling the relative sliding between the first connecting rod 41 and the second connecting rod 42.

[0063] Furthermore, in the embodiment of the present application, the second fixing device 43 also includes a second handle 49, which is arranged at one end of the rotating rod 46 extending out of the first connecting rod 41. The second handle 49 greatly reduces the operating difficulty of the pipe seam anchor drilling size measuring device.

[0064] Furthermore, in the embodiment of the present application, the outer side wall of the first connecting rod 41 is provided with scale lines, and the scale lines can be used to measure the depth of the device inserted into the drill hole.

[0065] Furthermore, in an embodiment of the present application, a connecting member 6 is also included, which is used to connect the first fixed rod 1, the second fixed rod 2, the telescopic rod 3 and the connecting rod 4. In this embodiment, the first fixed rod 1, the second fixed rod 2, the telescopic rod 3 and the connecting rod 4 are detachably connected through the connecting rod 4, making the pipe seam anchor drilling size measuring device more convenient to carry.

[0066] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A device for measuring the size of a pipe seam anchor hole, characterized in that: include: Two sets of triangular fixers and connecting rods, wherein the two sets of triangular fixers are connected by the connecting rod; Wherein, the triangular fixer includes a first fixing rod, a second fixing rod and a telescopic rod, the first fixing rod, the second fixing rod and the telescopic rod are hinged end to end in sequence, and the connecting rod is arranged at the hinge part between the first fixing rod, the second fixing rod and the telescopic rod.

2. The pipe seam anchor drilling size measuring device according to claim 1, characterized in that: The telescopic rod includes a first telescopic rod, a second telescopic rod and a first fixing device, the first end of the first telescopic rod is hinged to the first fixing rod, the first end of the second telescopic rod is hinged to the second fixing rod, the second end of the first telescopic rod extends from the second end of the second telescopic rod into the second telescopic rod and is slidably connected to the second telescopic rod, and the first fixing device is arranged at the second end of the second telescopic rod for controlling the relative sliding between the first telescopic rod and the second telescopic rod.

3. The pipe seam anchor drilling size measuring device according to claim 2, characterized in that: The telescopic rod further includes a first spring member, which is disposed in the second telescopic rod. One end of the first spring member abuts against the second telescopic rod, and the other end of the first spring member abuts against the second end of the first telescopic rod.

4. The pipe seam anchor drilling size measuring device according to claim 2, characterized in that: The first fixing device includes a first cam, a first handle and a supporting block. The second end of the second telescopic rod is provided with an opening, and the supporting block is movably arranged in the opening. The first cam is rotatably arranged at the second end of the second telescopic rod. The first handle is fixedly connected to the side wall of the first cam, and when the first cam is driven to rotate by the first handle, the first cam pushes the supporting block to abut against the side wall of the first telescopic rod.

5. The pipe seam anchor drilling size measuring device according to claim 1, characterized in that: It also includes an angle ruler, which is set on the first fixing rod and is used to measure the angle between the first fixing rod and the second fixing rod.

6. The pipe seam anchor drilling size measuring device according to claim 1, characterized in that: The connecting rod includes a first connecting rod, a second connecting rod and a second fixing device. The first connecting rod and the second connecting rod are respectively connected to a group of triangular fixers. The first connecting rod extends into the second connecting rod from the end of the second connecting rod and is slidably connected to the second connecting rod. The second fixing rod is arranged on the first connecting rod and is used to control the relative sliding between the first connecting rod and the second connecting rod.

7. The pipe seam anchor drilling size measuring device according to claim 6, characterized in that: The second fixing device includes a slider, a second eccentric wheel and a rotating rod. A cavity is provided in the first connecting rod, and a sliding groove is further provided on the side wall of the first connecting rod. The sliding groove is connected to the cavity. The second eccentric wheel is arranged in the cavity. One end of the rotating rod is connected to the eccentric of the second eccentric wheel, and the other end of the rotating rod extends from the end of the first connecting rod connected to the triangular fixer. The slider is slidably arranged in the sliding groove and contacts the side wall of the second eccentric wheel. When the second eccentric wheel is driven to rotate by the rotating rod, the second eccentric wheel pushes the slider to resist the inner side wall of the first connecting rod.

8. The pipe seam anchor drilling size measuring device according to claim 7, characterized in that: The second fixing device further includes a second handle, which is disposed at an end of the rotating rod extending out of the first connecting rod.

9. The pipe seam anchor drilling size measuring device according to claim 6, characterized in that: The outer side wall of the first connecting rod is provided with scale lines.

10. The pipe seam anchor drilling size measuring device according to claim 1, characterized in that: It also includes a connecting piece, through which the first fixing rod, the second fixing rod, the telescopic rod and the connecting rod are detachably connected.

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