Device and method for measuring diameter of center circle of foundation bolt hole

Abstract

The invention relates to the technical field of measurement, in particular to a device and method for measuring the diameter of a center circle of a foundation bolt hole, and the device comprises two insertion rod structures, each insertion rod structure is connected with one end of a plumb line, and the other end of the plumb line is connected with a measuring drop ring structure; when the lengths of the two plumb lines are consistent and the two plumb lines are pulled down by the gravity of the measuring pendant ring structures to naturally droop and straightly, the distance between the two measuring pendant ring structures is consistent with the distance between the two foundation bolt holes. Through mutual cooperation and cooperation among the hanging ring structure, the plumb line, the measuring drop ring structure, the measuring rod structure and the like, two measuring modes can be realized, the first measuring mode adopts a parallelogram principle to measure the distance between the two foundation bolt holes, and the second measuring mode adopts a trigonometric function principle to measure the distance between the two foundation bolt holes. And the distance between two opposite side foundation bolt holes can be accurately obtained.

Description

Technical Field

[0001] The invention relates to the field of measurement technology, and in particular to a device and method for measuring the central circle diameter of an anchor bolt hole. Background Art

[0002] At present, after the sleeve-type skirt of equipment such as reforming reactors and dehydrogenation reactors is welded, it is blocked by its internal cylinder and the conventional method can no longer accurately measure the center circle diameter of the anchor bolt hole, making it difficult to guarantee the size of the equipment, causing great inconvenience to the on-site installation of the equipment and causing unnecessary economic losses.

[0003] A feeler gauge tower anchor bolt hole measuring tool with announcement number CN214199865U includes a center column and an inspection arm, wherein the center column is a hollow steel tube, the center column is vertically arranged, and a plurality of arc-shaped through holes are arranged at intervals at different height positions of the tube wall of the center column; the inspection arm includes a front arm and a rear arm, the rear arm is made of a hollow steel tube, a pin hole is arranged on the rear arm, the front arm can be extended into the rear arm and fixed by a locating pin; the rear arm can be extended into the arc-shaped through hole and fixed.

[0004] However, the current measuring tool has the following disadvantages: first, the measuring method is single; second, the measuring method is similar to a compass, which is inconvenient to adjust and cannot accurately determine the distance between the two opposite anchor bolt holes. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The purpose of the present invention is to provide a device and method for measuring the center circle diameter of an anchor bolt hole in order to solve the above-mentioned problem.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention provides a device for measuring the center circle diameter of an anchor bolt hole, comprising two plug-in rod structures, each of which is connected to one end of a plumb line, and the other end of the plumb line is connected to a measuring pendant ring structure;

[0010] When the lengths of the two plumb lines are consistent with each other and both are pulled down naturally by the gravity of the measuring plumb ring structure to hang straight, the distance between the two measuring plumb ring structures is consistent with the distance between the two anchor bolt holes.

[0011] Furthermore, it includes two hand-held rod structures, and the two measuring rod structures correspond to the two hand-held rod structures one by one and are hinged to each other. Each hand-held rod structure is provided with an angle adjustment holding structure for adjusting the hinged rotation angle of the measuring rod structure thereon.

[0012] Furthermore, the handheld rod structure includes a rod body, a first through slot is provided on the rod body, and the measuring rod structure includes an insertion rod, one end of the insertion rod is hinged to the first through slot through a hinge shaft, baffles and baffle rings are respectively provided on the insertion rod, a hanging ring structure is provided on the insertion rod located between the baffles and the baffle ring, and the end of the plumb line is connected to the hanging ring structure.

[0013] Furthermore, a support wheel is rotatably provided at the end of the rod body, and an annular groove is opened on the outer side of the support wheel along its circumferential direction. A traction rope is rollingly supported on the support wheel, one end of the traction rope is fixedly connected to the baffle, and the other end of the traction rope is connected to the angle adjustment pulling structure.

[0014] Furthermore, the angle adjustment holding structure includes an adjustment slot opened in the rod body, a first open slot is opened on one side of the adjustment slot, the extension direction of the adjustment slot is consistent with the axial direction of the rod body, an adjustment handle is slidably arranged in the adjustment slot, and a fixing structure is arranged on the adjustment handle for clamping and fixing the position with the rod body.

[0015] Furthermore, the locking structure includes an outer grip tube slidably sleeved on the outside of the rod body, one side of the adjusting handle passes through the first open slide groove and is fixedly connected to the inner wall of the outer grip tube, the outer grip tube and the first open slide groove are hingedly provided with a grip ring on the side opposite to each other, a torsion spring is provided at the hinge between the grip ring and the outer grip tube, one end of the grip ring is fixedly connected with a triangular clamping mouth, and the outer side of the rod body is provided with a plurality of evenly distributed clamping teeth along its axial direction for cooperating with the clamping mouth.

[0016] Furthermore, the outer side of the insertion rod is provided with more than two support plates evenly distributed with its axis as the center, and a guide slider is fixedly provided on the end of each support plate, and a guide slot for slidingly connecting with the guide slider is provided on the baffle plate, and a guide shaft is fixedly provided in the guide slot, and the axial direction of the guide shaft is consistent with the sliding direction of the guide slider in the guide slot, and a guide slide hole for cooperating with the sliding connection of the guide shaft is provided on the guide slider, and a driving connecting rod mechanism for expanding the support plate outward and retracting it inward is provided on the insertion rod.

[0017] Furthermore, the driving connecting rod mechanism includes an adjusting channel opened in the insertion rod, a sliding column is slidably arranged in the adjusting channel, and an electric telescopic rod for sliding and moving with the driving sliding column in the adjusting channel is arranged at one end of the adjusting channel, and two or more second open sliding grooves that can be communicated with the adjusting channel are opened on the outer wall of the insertion rod, and two or more parallel connecting rods are hingedly connected between the sliding column and each support plate, and the connecting rods and the second open sliding grooves are slidably connected with each other, the outer shape of the insertion rod is a round rod body, and the outer shape of the support plate is an arc-shaped plate body that fits the outer wall of the insertion rod, and a control button for controlling the extension and retraction of the push rod of the electric telescopic rod is arranged on the rod body.

[0018] Furthermore, the measuring pendant ring structure includes a pendant ring with a circular ring shape, the outer side of the pendant ring is provided with angle marks along its circumferential direction, a center positioning cone is provided at the center hole of the pendant ring, the outer contour of the center positioning cone is in the shape of a cone, the center positioning cone is fixedly connected to the inner hole wall of the pendant ring through more than two support rods, and a lifting block for connecting with a plumb line is fixedly provided on one side of the outer side of the pendant ring.

[0019] In addition, the present invention also discloses a method for measuring the center circle diameter of an anchor bolt hole, comprising the following steps:

[0020] S1: The first measurement method is to insert one of the measuring rod structures into one of the anchor bolt holes of the skirt, and then insert the other measuring rod structure into the other opposite anchor bolt hole of the skirt, and place the baffle close to the end face of the skirt, and set the two plumb lines to be of equal length. Then, when the two plumb lines are suspended and stable, measure the distance between the two measuring pendant ring structures to obtain the center distance of the pair of anchor bolt holes;

[0021] S2: In step S1, when the measuring rod structure is inserted into the anchor bolt hole, the hand-held rod structure is held to lift the measuring rod structure to a certain height, and the angle between the measuring rod structure and the hand-held rod structure is adjusted by the angle adjustment holding structure. After the measuring rod structure is aligned with the anchor bolt hole, the hand-held rod structure is held to insert the measuring rod structure into the anchor bolt hole;

[0022] S3: In step S1, when the measuring rod structure is inserted into the anchor bolt hole, the control button controls the push rod of the electric telescopic rod to shorten, thereby driving the sliding column to slide in the guide slot, and the movement of the sliding column can drive the support plate to expand outward through the connecting rod, wherein the guide shaft can play a guiding and limiting role in the outward expansion of the support plate, and the support plate is expanded outward to a state of abutting against the hole wall of the anchor bolt hole;

[0023] S4: The second measurement mode, the hanging ring structure uses a laser distance measuring rope. When the plumb line can be pulled out or retracted in the laser distance measuring rope, the laser distance measuring rope can detect and display the pulled-out length of the plumb line. After repeating step S1, the two measuring pendant ring structures are pulled close to each other and overlapped at the center. At this time, the two laser distance measuring ropes can respectively detect the pulled-out length of the plumb line and display it as length amm and bmm. The angle between the two plumb lines is obtained from the angle marks on the two measuring pendant ring structures, and the trigonometric function formula can be used to calculate: c 2 =a 2 +b 2 -2abcosα, where c is the distance between the two anchor bolt holes and α is the angle between side a and side b.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Through the coordination and cooperation between the hanging ring structure, plumb line, measuring pendant ring structure and measuring rod structure, two measurement modes can be realized. The first measurement mode is to measure the distance between two anchor bolt holes using the parallelogram principle, and the second measurement mode is to measure the distance between two anchor bolt holes using the trigonometric function principle, and the distance between two opposite anchor bolt holes can be accurately obtained;

[0027] 2. The hand-held rod structure and the angle adjustment holding structure cooperate to facilitate the lifting operation of the measuring rod structure, so that it is suitable for measuring the anchor bolt holes of large-size equipment, and it is convenient and accurate to align the measuring rod structure into the anchor bolt hole;

[0028] 3. The measuring pendant ring structure can be used in two measurement modes. In the measurement mode using the parallelogram principle, it acts as a plumb cone to stretch the plumb line straight down. In the measurement mode using the trigonometric function principle, it can act as the center intersection and measure the angle between two plumb lines.

[0029] 4. The driving connecting rod mechanism drives the support plate to expand, thereby realizing the locking of the measuring rod structure in the anchor bolt hole, so as to be suitable for the positioning of anchor bolt holes with different hole diameters, and also realizing that the central axis of the insertion rod and the central axis of the anchor bolt hole are coaxial with each other, thereby ensuring the measurement accuracy in the anchor bolt hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a front view schematic diagram of the present invention;

[0032] Figure 2 The present invention Figure 1 A three-dimensional schematic diagram of

[0033] Figure 3 The present invention Figure 1 AA cross-sectional diagram of ;

[0034] Figure 4 The present invention Figure 3 A local enlarged schematic diagram of point B;

[0035] Figure 5 The present invention Figure 3 A local enlarged schematic diagram of point C;

[0036] Figure 6 is a three-dimensional schematic diagram of a measuring device of the present invention;

[0037] Figure 7 It is a three-dimensional schematic diagram of the measuring pendant ring structure of the present invention;

[0038] Figure 8 It is a schematic diagram of the first measurement method of the present invention;

[0039] Fig. 9 It is a schematic diagram of the second measurement method of the present invention.

[0040] The reference numerals are as follows: 1. Hand-held rod structure; 101. Rod body; 102. First through slot; 103. Articulated shaft; 104. Towing rope; 105. Support wheel; 2. Angle adjustment holding structure; 201. Adjustment slide slot; 202. Adjustment handle; 203. Mouthpiece; 204. Grip ring; 205. Torsion spring; 206. Grip teeth; 207. External grip tube; 3. Hanging ring structure; 301. Plumb line; 4. Measurement pendant ring structure; 401. Pendant ring; 402. Center positioning cone; 403, support rod; 404, lifting block; 405, angle mark; 5, skirt seat; 501, anchor bolt hole; 6, measuring rod structure; 601, plug rod; 602, slide column; 603, electric telescopic rod; 604, second opening slide groove; 605, support plate; 606, second through groove; 607, connecting rod; 608, baffle; 609, guide slide groove; 610, guide shaft; 611, guide slider; 612, retaining ring; 7, control button. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 9 As shown, the present invention provides a device for measuring the diameter of the center circle of an anchor bolt hole, comprising two insertion rod structures 6, each of which is connected to one end of a plumb line 301, and the other end of the plumb line 301 is connected to a measuring pendant ring structure 4; when the lengths of the two plumb lines 301 are consistent with each other and both are naturally drooped straight by the gravity of the measuring pendant ring structures 4, the spacing between the two measuring pendant ring structures 4 is consistent with the spacing between the two anchor bolt holes 501. It also includes two hand-held rod structures 1, and the two measuring rod structures 6 correspond to the two hand-held rod structures 1 one by one and are hinged to each other, and each hand-held rod structure 1 is provided with an angle adjustment holding structure 2 for adjusting the hinged rotation angle of the measuring rod structure 6 thereon.

[0043] See the instruction manual Figure 1 , Figure 3 and Figure 4As shown, the hand-held rod structure 1 includes a rod body 101, and a first through slot 102 is provided on the rod body 101. The measuring rod structure 6 includes an insert rod 601, and one end of the insert rod 601 is hinged to the first through slot 102 through a hinge shaft 103. The insert rod 601 is provided with a baffle 608 and a baffle ring 612, respectively. The insert rod 601 located between the baffle 608 and the baffle ring 612 is provided with a hanging ring structure 3, and the end of the plumb line 301 is connected to the hanging ring structure 3. Through the above-mentioned specific structural design, the baffle 608 and the baffle ring 612 can cooperate to realize the limited hanging of the hanging ring structure 3. In addition, the hanging ring structure 3 is rotatably connected to the insert rod 601 by a bearing, so that when the plumb line 301 is stretched straight by the gravity of the measuring pendant ring structure 4, the hanging ring structure 3 is convenient to rotate through the bearing.

[0044] The end of the rod body 101 is rotatably provided with a support wheel 105, and an annular groove is provided on the outer side of the support wheel 105 along its circumferential direction. A traction rope 104 is provided on the support wheel 105 for rolling support. One end of the traction rope 104 is fixedly connected to the baffle 608, and the other end of the traction rope 104 is connected to the angle adjustment holding structure 2. When the angle adjustment holding structure 2 performs traction adjustment on the traction rope 104, the support wheel 105 can realize the steering support for the traction rope 104, and form a lever structure for adjusting the measuring rod structure 6, so as to conveniently and labor-savingly adjust the angle of the measuring rod structure 6.

[0045] See the instruction manual Figure 3 and Figure 5As shown, the angle adjustment holding structure 2 includes an adjustment slot 201 opened in the rod body 101, a first open slot is opened on one side of the adjustment slot 201, the extension direction of the adjustment slot 201 is consistent with the axial direction of the rod body 101, an adjustment handle 202 is slidably arranged in the adjustment slot 201, and a fixing structure is arranged on the adjustment handle 202 for clamping and fixing the position with the rod body 101. The locking structure includes an outer grip tube 207 that is slidably sleeved on the outside of the rod body 101, one side of the adjusting handle 202 passes through the first open slide groove and is fixedly connected to the inner wall of the outer grip tube 207, and a grip ring 204 is hingedly provided on the side of the outer grip tube 207 opposite to the first open slide groove. A torsion spring 205 is provided at the hinge between the grip ring 204 and the outer grip tube 207, and a triangular-shaped clamping mouth 203 is fixedly connected to one end of the grip ring 204. A plurality of evenly distributed clamping teeth 206 for cooperating and connecting with the clamping mouth 203 are provided along the axial direction of the outer side of the rod body 101. Through the above-mentioned specific structural design, when holding the outer grip tube 207 and the grip ring 204, the grip ring 204 is held close to the outer grip tube 207 and squeezed. When the grip ring 204 rotates, the torsion spring 205 is in a compressed and tightened state, and at this time, the mouthpiece 203 and the latch tooth 206 are separated from each other, and the adjustment handle 202 is slid and moved in the adjustment slot 201, thereby pulling or loosening the measuring rod structure 6 through the traction rope 104, and when the grip ring 204 is released, the grip ring 204 is reset under the elastic force of the torsion spring 205, thereby achieving the contact and engagement between the mouthpiece 203 and the latch tooth 206, thereby achieving the position of the adjustment handle 202 in the adjustment slot 201, maintaining the hinge angle between the measuring rod structure 6 and the rod body 101, and facilitating the positioning and alignment of the measuring rod structure 6 and inserting it into the anchor bolt hole 501.

[0046] See the instruction manual Figure 3 and Figure 4As shown, the outer side of the insertion rod 601 is provided with more than two support plates 605 evenly distributed around its axis, and a guide slider 611 is fixedly provided at the end of each support plate 605. A guide slot 609 for slidingly connecting with the guide slider 611 is provided on the baffle plate 608, and a guide shaft 610 is fixedly provided in the guide slot 609. The axial direction of the guide shaft 610 is consistent with the sliding direction of the guide slider 611 in the guide slot 609. A guide slide hole for cooperating with the sliding connection of the guide shaft 610 is provided on the guide slider 611, and a driving connecting rod mechanism for expanding the support plate 605 outward and retracting it inward is provided on the insertion rod 601. The driving connecting rod mechanism includes an adjusting channel provided in the insertion rod 601, a sliding column 602 is slidably arranged in the adjusting channel, an electric telescopic rod 603 is provided at one end of the adjusting channel for sliding and moving with the driving sliding column 602 in the adjusting channel, and two or more second open sliding grooves 604 that can be communicated with the adjusting channel are provided on the outer wall of the insertion rod 601, and two or more parallel connecting rods 607 are hingedly connected between the sliding column 602 and each support plate 605, and the connecting rod 607 and the second open sliding groove 604 are slidably connected with each other. The outer shape of the insertion rod 601 is a round rod body, and the outer shape of the support plate 605 is an arc-shaped plate body that fits the outer wall of the insertion rod 601. A control button 7 for controlling the extension and retraction of the push rod of the electric telescopic rod 603 is provided on the rod body 101. Through the above-mentioned specific structural design, the driving connecting rod mechanism drives the support plate 605 to unfold, thereby achieving the locking of the measuring rod structure 6 in the anchor bolt hole 501, and also achieving the central axis of the insertion rod 601 and the central axis of the anchor bolt hole 501 to be coaxial with each other, thereby ensuring the measurement accuracy inside the anchor bolt hole 501.

[0047] See the instruction manual Figure 6 and Figure 7 As shown, the measuring pendant ring structure 4 includes a pendant ring 401 with a circular ring shape, and the outer side of the pendant ring 401 is provided with an angle mark 405 along its circumferential direction. A center positioning cone 402 is provided at the center hole of the pendant ring 401, and the outer contour of the center positioning cone 402 is in the shape of a cone. The center positioning cone 402 is fixedly connected to the inner hole wall of the pendant ring 401 through more than two support rods 403, and a lifting block 404 for connecting with the plumb line 301 is fixedly provided on one side of the outer side of the pendant ring 401. Through the above-mentioned specific structural design, the center positioning cone 402 is used for locating the center point of the distance measurement between the two measuring pendant ring structures 4, and the angle mark 405 is used to measure the angle between the two plumb lines 301. The pendants 401 of the two measuring pendant ring structures 4 overlap and dock with each other, which can facilitate the alignment of the center point.

[0048] Working principle and beneficial effects of the present invention:

[0049] See the instruction manual Figure 8As shown, in the first measurement method, one of the measuring rod structures 6 is inserted into an anchor bolt hole 501 of the skirt seat 5, and then the other measuring rod structure 6 is inserted into the other opposite anchor bolt hole 501 of the skirt seat 5, and the baffle 608 is close to the end face of the skirt seat 5, and the two plumb lines 301 are set at equal lengths. Then, when the two plumb lines 301 are hung vertically and stably, the distance between the two measuring pendant ring structures 4 is measured to obtain the center distance between the pair of anchor bolt holes 501; when the measuring rod structure 6 is inserted into the anchor bolt hole 501, the hand-held rod structure 1 is held to lift the measuring rod structure 6 to a certain height, and the holding structure 2 is adjusted by the angle to The angle between the measuring rod structure 6 and the hand-held rod structure 1 is adjusted. After the measuring rod structure 6 is aligned with the anchor bolt hole 501, the hand-held rod structure 1 is held to insert the measuring rod structure 6 into the anchor bolt hole 501. When the measuring rod structure 6 is inserted into the anchor bolt hole 501, the control button 7 controls the push rod of the electric telescopic rod 603 to shorten, thereby driving the slide column 602 to slide in the guide slot 609. The movement of the slide column 602 can drive the support plate 605 to expand outward through the connecting rod 607, wherein the guide shaft 610 can guide and limit the expansion of the support plate 605. The support plate 605 expands outward to a state of contacting with the hole wall of the anchor bolt hole 501.

[0050] See the instruction manual Fig. 9 As shown, in the second measurement method, the hanging ring structure 3 adopts a laser distance measuring rope ruler, wherein the laser distance measuring rope ruler is a prior art and is well known to those skilled in the art. The plumb line 301 is a rope body used on the laser distance measuring rope ruler. When the plumb line 301 can be pulled out or retracted in the laser distance measuring rope ruler, the laser distance measuring rope ruler can detect and display the pulled-out length of the plumb line 301. When the two measuring rod structures 6 are inserted into the two anchor bolt holes 501 on the opposite side, the two measuring pendant ring structures 4 are pulled close to each other and overlapped at the center. At this time, the two laser distance measuring rope rulers can respectively detect the pulled-out length of the plumb line 301 and display it as length amm and bmm. The angle between the two plumb lines 301 is obtained from the angle marks 405 on the two measuring pendant ring structures 4, and the trigonometric function formula can be used to calculate: c 2 =a 2 +b 2 -2abcosα, where c is the distance between the two anchor bolt holes 501, and α is the angle between the a side and the b side.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A device for measuring the center circle diameter of an anchor bolt hole, characterized in that: It comprises two insertion rod structures (6), each of the insertion rod structures (6) is respectively connected to one end of a plumb line (301), and the other end of the plumb line (301) is connected to a measuring pendant ring structure (4); When the two plumb lines (301) are of the same length and are both pulled down naturally and straight by the gravity of the measuring pendant ring structure (4), the distance between the two measuring pendant ring structures (4) is consistent with the distance between the two anchor bolt holes (501).

2. A device for measuring the center circle diameter of an anchor bolt hole according to claim 1, characterized in that: The invention comprises two hand-held rod structures (1), two measuring rod structures (6) corresponding to the two hand-held rod structures (1) respectively and being hinged to each other, and each hand-held rod structure (1) is provided with an angle adjustment holding structure (2) for adjusting the hinged rotation angle of the measuring rod structure (6) thereon.

3. A device for measuring the center circle diameter of an anchor bolt hole according to claim 2, characterized in that: The hand-held rod structure (1) comprises a rod body (101), a first through slot (102) is provided on the rod body (101), the measuring rod structure (6) comprises an insertion rod (601), one end of the insertion rod (601) is hinged to the first through slot (102) via a hinge shaft (103), a baffle plate (608) and a baffle ring (612) are respectively provided on the insertion rod (601), a hanging ring structure (3) is provided on the insertion rod (601) between the baffle plate (608) and the baffle ring (612), and an end of the plumb line (301) is connected to the hanging ring structure (3).

4. A device for measuring the center circle diameter of an anchor bolt hole according to claim 3, characterized in that: A support wheel (105) is rotatably provided at the end of the rod body (101), an annular groove is provided on the outer side of the support wheel (105) along its circumferential direction, a traction rope (104) is rollingly supported on the support wheel (105), one end of the traction rope (104) is fixedly connected to the baffle (608), and the other end of the traction rope (104) is connected to the angle adjustment holding structure (2).

5. A device for measuring the center circle diameter of an anchor bolt hole according to claim 4, characterized in that: The angle adjustment holding structure (2) comprises an adjustment slot (201) provided in the rod body (101), a first opening slot being provided on one side of the adjustment slot (201), the extension direction of the adjustment slot (201) being consistent with the axial direction of the rod body (101), an adjustment handle (202) being slidably provided in the adjustment slot (201), and a locking structure for clamping and fixing the position between the adjustment slot (201) and the rod body (101) being provided on the adjustment handle (202).

6. A device for measuring the center circle diameter of an anchor bolt hole according to claim 5, characterized in that: The locking structure comprises an outer grip tube (207) slidably sleeved on the outside of the rod body (101), one side of the adjusting handle (202) passes through the first open slot and is fixedly connected to the inner wall of the outer grip tube (207), a grip ring (204) is hingedly provided on the side of the outer grip tube (207) opposite to the first open slot, a torsion spring (205) is provided at the hinge between the grip ring (204) and the outer grip tube (207), one end of the grip ring (204) is fixedly connected to a triangular-shaped clamping mouth (203), and a plurality of uniformly distributed clamping teeth (206) for cooperating with the clamping mouth (203) are provided on the outer side of the rod body (101) along its axial direction.

7. The device for measuring the center circle diameter of an anchor bolt hole according to claim 3, characterized in that: The outer side of the insertion rod (601) is provided with more than two support plates (605) evenly distributed around its axis, and a guide slider (611) is fixedly provided at the end of each support plate (605). The baffle plate (608) is provided with a guide slot (609) for slidingly connecting with the guide slider (611), and a guide shaft (610) is fixedly provided in the guide slot (609). The axial direction of the guide shaft (610) is consistent with the sliding direction of the guide slider (611) in the guide slot (609). A guide slot hole for slidingly connecting with the guide shaft (610) is provided through the guide slider (611), and a driving connecting rod mechanism for expanding the support plate (605) outward and retracting it inward is provided on the insertion rod (601).

8. The device for measuring the center circle diameter of an anchor bolt hole according to claim 7, characterized in that: The driving connecting rod mechanism comprises an adjusting channel provided in the insertion rod (601), a sliding column (602) being slidably provided in the adjusting channel, an electric telescopic rod (603) being provided at one end in the adjusting channel for slidingly moving with the driving sliding column (602) in the adjusting channel, two or more second open sliding grooves (604) being communicated with the adjusting channel being provided on the outer wall of the insertion rod (601), two or more parallelly distributed connecting rods (607) being hingedly connected between the sliding column (602) and each support plate (605), the connecting rod (607) and the second open sliding grooves (604) being slidably connected with each other, the outer shape of the insertion rod (601) being in the shape of a round rod, the outer shape of the support plate (605) being in the shape of an arc-shaped plate that fits the outer wall of the insertion rod (601), and a control button (7) for controlling the extension and retraction of the push rod of the electric telescopic rod (603) being provided on the rod body (101).

9. The device for measuring the center circle diameter of an anchor bolt hole according to claim 1, characterized in that: The measuring pendant ring structure (4) comprises a pendant ring (401) with a circular ring shape, an outer side of the pendant ring (401) is provided with an angle mark (405) along its circumferential direction, a center positioning cone (402) is provided at the center hole of the pendant ring (401), the outer contour of the center positioning cone (402) is in the shape of a cone, the center positioning cone (402) is fixedly connected to the inner hole wall of the pendant ring (401) through two or more supporting rods (403), and a hanging block (404) for connecting with a plumb line (301) is fixedly provided on one side of the outer side of the pendant ring (401).

10. A method for measuring the center circle diameter of an anchor bolt hole, characterized in that: The device for measuring the center circle diameter of an anchor bolt hole according to any one of claims 1 to 9 comprises the following steps: S1: A first measurement method is to insert one of the measuring rod structures (6) into an anchor bolt hole (501) of the skirt seat (5), and then insert the other measuring rod structure (6) into the other opposite anchor bolt hole (501) of the skirt seat (5), and place the baffle (608) close to the end face of the skirt seat (5), and set the two plumb lines (301) to be of equal length. Then, when the two plumb lines (301) are suspended and stable, measure the distance between the two measuring pendant ring structures (4), and the center distance between the pair of anchor bolt holes (501) can be obtained; S2: In step S1, when the measuring rod structure (6) is inserted into the anchor bolt hole (501), the measuring rod structure (6) is lifted to a certain height by holding the hand-held rod structure (1), and the angle between the measuring rod structure (6) and the hand-held rod structure (1) is adjusted by the angle adjustment holding structure (2). After the measuring rod structure (6) is aligned with the anchor bolt hole (501), the measuring rod structure (6) is inserted into the anchor bolt hole (501) by holding the hand-held rod structure (1); S3: In step S1, when the measuring rod structure (6) is inserted into the anchor bolt hole (501), the control button (7) controls the push rod of the electric telescopic rod (603) to shorten, thereby driving the sliding column (602) to slide and move in the guide groove (609), and the movement of the sliding column (602) can drive the support plate (605) to expand outward through the connecting rod (607), wherein the guide shaft (610) can play a guiding and limiting role in the outward expansion of the support plate (605), and the support plate (605) is expanded outward to a state of abutting against the hole wall of the anchor bolt hole (501); S4: In the second measurement mode, the hanging ring structure (3) uses a laser distance measuring rope. When the plumb line (301) can be pulled out or retracted in the laser distance measuring rope, the laser distance measuring rope can detect and display the pulled-out length of the plumb line (301). After repeating step S1, the two measuring pendant ring structures (4) are pulled close to each other and overlapped at the center. At this time, the two laser distance measuring ropes can respectively detect the pulled-out length of the plumb line (301) and display it as length amm and bmm. The angle between the two plumb lines (301) is obtained from the angle marks (405) on the two measuring pendant ring structures (4). The trigonometric formula can be used to calculate: c 2 =a 2 +b 2 -2abcosα, where c is the distance between the two anchor bolt holes (501), and α is the angle between the a side and the b side.

Images