Expansion type control point measuring nail

Abstract

The utility model relates to the technical field of control measurement in geodetic survey, in particular to an expansion type control point measuring nail, which comprises a control nail main body, a control nail marking cap, an expansion pipe and a top cover. The top end of the control nail body is integrally connected with the control nail head. The control nail marking cap and the control nail body are integrally connected, a cylindrical hole with an upward opening is formed in the control nail marking cap, and the control nail head is located on the inner side of the cylindrical hole. The control nail body is inserted into the expansion pipe and spirally connected with the expansion pipe. A column pipe is arranged at the bottom of the top cover, the column pipe is inserted into the column-shaped hole and is in spiral connection with the control nail marking cap, the inner wall of the column pipe is rotationally connected with the control nail head, and a waterproof ring is arranged on the top cover and attached to the upper surface of the control nail marking cap. The device does not need to pre-embed a cement control pile, is time-saving and labor-saving, is simple to operate, and greatly improves the embedding efficiency of the control point.

Description

Technical Field

[0001] The utility model relates to the technical field of control surveying in geodetic surveying, and particularly relates to an expandable control point measuring nail. Background Art

[0002] A GPS control point is a fixed point at which the plane position, elevation, and / or gravitational acceleration and other data are measured with a certain accuracy. Usually, it is necessary to bury a monument or set other marks at the point, and a fixed or temporary surveying mark should be erected at the control point (such as a triangulation point or a traverse point) that is sighted from a distance.

[0003] According to the nature of the control points, they can be divided into:

[0004] ① Plane control points, which are control points at which the plane coordinate values have been measured;

[0005] ② Elevation control points, which are control points at which the elevation values have been measured;

[0006] ③ Astronomical points, which are control points at which the astronomical longitude and latitude and astronomical azimuth have been measured;

[0007] ④ Gravity points, which are control points at which the gravitational acceleration value has been measured.

[0008] According to the accuracy and use, they can be divided into:

[0009] ① Geodetic control points, which are control points with unified grade accuracy standards of geodetic coordinates laid out in the country or a certain area;

[0010] ② Topographic control points, which are control points laid out for topographic surveying other than the national grades;

[0011] ③ Engineering control points, which are control points specifically laid out for engineering surveying.

[0012] Commonly used control points also include:

[0013] ① Triangulation points, which are plane control points located at the triangulation network points in triangulation surveying, trilateration surveying, and triangulateration surveying;

[0014] ② Traverse points, which are plane control points located at the turning points of the traverse in traverse surveying;

[0015] ③ Bench marks, which are elevation control points measured by leveling; ④ Control points, which are control points whose positions are measured by the global positioning system (GPS) technology; ⑤ Mapping root points, which are control points specifically laid out for mapping topographic maps.

[0016] Among them, geodetic control points refer to a series of points laid out within the area to be surveyed before the surveying operation to complete the surveying operation of the entire area.

[0017] In the past, all control points needed to be buried in the mode of cement control piles + steel control points. In actual construction operations, only about 20 control points could be buried in one day, but it still took 3 - 7 days for the cement to solidify, and the coordinates of the control points could only be collected 7 days later. The labor cost, material cost, etc. in this process were relatively high, and the time required was relatively long.

[0018] For example, the Chinese patent with the authorization announcement number CN213579370U discloses a control point marking device for tunnel surveying, which relates to the technical field of tunnel construction surveying. The control point marking device includes: a barrel body, a marking nail, and a barrel cover; the barrel body is used to be arranged in a groove at a preset position of the concrete roadbed in the tunnel; the lower end of the marking nail is inserted into the concrete roadbed for fixation, and the upper end extends into the inner cavity of the barrel body, and the barrel cover is connected to the upper end of the barrel body; the barrel cover is used to isolate the inner cavity of the barrel body from the outside. In the control point marking device for tunnel surveying in the present invention, by setting the barrel body, arranging the marking nail in the inner cavity of the barrel body, and setting the barrel cover at the upper end of the barrel body, when there is muck or accumulated water, the barrel body and the barrel cover isolate the marking nail from the muck or accumulated water, preventing the muck or accumulated water from covering the marking nail, facilitating the use of the marking nail as a control point mark, and thus improving the efficiency of tunnel surveying.

[0019] However, this device still has deficiencies: this device still needs to pre - excavate a foundation pit and then pre - bury the barrel body, which is time - consuming and laborious to operate, and the efficiency of burying control points is low. Summary of the Invention

[0020] The purpose of the present invention is to propose an expandable control point measuring nail in view of the problems existing in the background technology.

[0021] The technical solution of the present invention: An expandable control point measuring nail includes a control nail main body, a control nail marking cap, an expansion tube, and a top cover.

[0022] The top end of the control nail main body is integrally connected to a control nail head. The control nail marking cap is integrally connected to the control nail main body, and a cylindrical hole with an upward opening is arranged inside the control nail marking cap, and the control nail head is located inside the cylindrical hole. The control nail main body is inserted into the expansion tube and is spirally connected thereto.

[0023] A column tube is arranged at the bottom of the top cover, the column tube is inserted into the cylindrical hole and is spirally connected to the control nail marking cap, and the inner wall of the column tube is rotationally connected to the control nail head. A waterproof ring is arranged on the top cover, and the waterproof ring fits with the upper surface of the control nail marking cap.

[0024] Preferably, a threaded groove communicating with its inner side is arranged on the outer wall of the cylindrical hole, and spiral teeth are arranged on the outside of the column tube. The spiral teeth are located inside the threaded groove and are spirally connected thereto.

[0025] Preferably, the control nail head is a prismatic nail head, and a cross slot with an upward opening is provided on the control nail head.

[0026] Preferably, a central punctuation mark collinear with its axis is provided inside the top cover, and a number of bumps are provided on the upper surface of the top cover around the central punctuation mark.

[0027] Preferably, an annular groove is provided on the arc surface of the top cover, a limiting ring is provided on the inner side of the waterproof ring, and the limiting ring is inserted into the annular groove and rotatably connected thereto.

[0028] Preferably, a warning mark is provided on the upper surface of the control nail marking cap, and a perspective window corresponding to the warning mark is provided on the waterproof ring.

[0029] Preferably, the top cover is an anti-corrosion cover and the waterproof ring is an anti-corrosion ring.

[0030] Compared with the prior art, the utility model has the following beneficial technical effects:

[0031] By setting the control nail body, the control nail head and the control nail marking cap as an integrated structure and cooperating with the expansion tube, there is no need to bury a cement control pile in the same way as the traditional buried point method, saving the control point burying time, improving work efficiency, and using this structure can reduce labor costs and material costs. By setting the detachable top cover and the waterproof ring structure, the control nail marking cap and the control nail head can be protected by this cooperation structure to prevent the control nail marking cap and the control nail head from being corroded due to long-term exposure to the outdoor environment. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of an embodiment of the utility model;

[0033] Figure 2 It is a structural diagram of the control nail body and the control nail marking cap;

[0034] Figure 3 It is a connection structural diagram of the top cover and the waterproof ring;

[0035] Figure 4 It is a structural diagram of the control nail body and the control nail marking cap in another embodiment;

[0036] Figure 5 It is a structural diagram of the top cover and the waterproof ring in another embodiment.

[0037] Reference numerals: 1, control nail body; 2, control nail head; 3, control nail marking cap; 301, cylindrical hole; 302, thread groove; 303, limiting groove; 304, clamping groove; 4, expansion tube; 5, top cover; 501, bump; 502, central punctuation mark; 6, column tube; 601, limiting block; 602, clamping block; 7, waterproof ring; 701, perspective window. Detailed implementation mode

[0038] Example 1

[0039] As Figures 1 - 3 shown, an expandable control point measurement nail proposed by the present utility model includes a control nail main body 1, a control nail marking cap 3, an expansion tube 4 and a top cover 5.

[0040] The top end of the control nail main body 1 is integrally connected to a control nail head 2. The control nail head 2 is a prismatic nail head, and a cross slot with an upward opening is provided on the control nail head 2.

[0041] The control nail marking cap 3 is integrally connected to the control nail main body 1, and a cylindrical hole 301 with an upward opening is provided inside the control nail marking cap 3. The control nail head is located inside the cylindrical hole 301. The control nail main body 1 is inserted into the expansion tube 4 and is screwed to it.

[0042] A central punctuation 502 is provided inside the top cover 5 on the same straight line as its axis, and a number of bumps 501 are provided on the upper surface of the top cover 5 around the central punctuation 502. A column tube 6 is provided at the bottom of the top cover 5. The column tube 6 is inserted into the cylindrical hole 301 and is screwed to the control nail marking cap 3, and the inner wall of the column tube 6 is rotatably connected to the control nail head 2. Thread grooves 302 communicating with the inside are provided on the outer wall of the cylindrical hole 301, and spiral teeth are provided on the outside of the column tube 6. The spiral teeth are located inside the thread groove 602 and are screwed to it. A waterproof ring 7 is provided on the top cover 5, and the waterproof ring 7 is attached to the upper surface of the control nail marking cap 3.

[0043] An annular groove is provided on the arc surface of the top cover 5, a limiting ring is provided inside the waterproof ring 7, and the limiting ring is inserted into the annular groove and is rotatably connected to it. A warning mark is provided on the upper surface of the control nail marking cap 3, and a perspective window 701 corresponding to the warning mark is provided on the waterproof ring 7. The top cover 5 is an anti-corrosion cover, and the waterproof ring 7 is an anti-corrosion ring.

[0044] In this embodiment, during construction, first use tools such as a wireless impact drill or an electric hammer to perform drilling operations on a paved road surface or other hard ground. After drilling is completed, insert the expansion tube 4 into the hole, then insert the control nail main body 1 into the expansion tube 4, use a wrench to hold the control nail head 2 and screw the control nail main body 1 into the ground until the lower surface of the control nail marking cap 3 fits the road surface. Subsequently, screw the main tube 6 at the bottom of the top cover 5 into the cylindrical hole 301 until the lower surfaces of the top cover 5 and the waterproof ring 7 are hermetically attached to the upper surface of the control nail marking cap 3. Finally, rotate the waterproof ring 7 so that its perspective window 701 corresponds to the warning mark on the control nail marking cap 3. Thus, the control point burying work is completed.

[0045] The whole operation process of this embodiment only takes 20 minutes, and the control point collection work can be carried out on the spot. Compared with the traditional mode, the efficiency is increased by 3 times.

[0046] Embodiment 2

[0047] As Figure 4 and Figure 5 shown, a kind of expansion type control point measuring nail proposed by the utility model, compared with Embodiment 1, two limiting grooves 303 are symmetrically arranged in the control nail marking cap 3, the limiting grooves 303 communicate with the cylindrical hole 301, and two clamping grooves 304 communicating with the corresponding side limiting grooves 303 are symmetrically arranged in the control nail marking cap 3. Two limiting blocks 601 are symmetrically arranged on the outer wall of the column tube 6, and wedge-shaped clamping blocks 602 are arranged on the mutually far-away sides of the two limiting blocks 601. The two limiting blocks 601 are respectively inserted into the corresponding side limiting grooves 303 and are slidably connected with them, and the two clamping blocks 602 are respectively clamped into the corresponding side clamping grooves 304.

[0048] In this embodiment, after the control nail body 1 is completely fixed, the column tube 6 at the bottom of the top cover 5 is inserted into the cylindrical hole 301, so that the two limiting blocks 601 are respectively corresponding to the corresponding side limiting grooves 303 and are inserted downward until the clamping blocks 602 are horizontally clamped into the clamping grooves 304. At this time, due to the one-way locking cooperation between the clamping blocks 602 and the clamping grooves 304, the top cover 5 cannot be pulled out. In this state, the control nail head 2 is protected by the top cover 5 to prevent irrelevant personnel from using tools to remove the measuring nail from the cement pier column. This structure plays a good protective role for the device.

[0049] The above has described in detail the embodiments of the utility model in conjunction with the drawings. However, the utility model is not limited to this. Various changes can be made without departing from the gist of the utility model within the knowledge scope of those skilled in the art to which the utility model pertains.

Claims

1. An expansion control point measuring nail, characterized in that: The invention comprises a control nail body (1), a control nail marking cap (3), an expansion tube (4) and a top cover (5); the top of the control nail body (1) is integrally connected to the control nail head (2); the control nail marking cap (3) is integrally connected to the control nail body (1), and a cylindrical hole (301) opening upward is arranged in the control nail marking cap (3), and the control nail head is located on the inner side of the cylindrical hole (301); the control nail body (1) is inserted into the expansion tube (4) and is spirally connected thereto; a column tube (6) is arranged at the bottom of the top cover (5), the column tube (6) is inserted into the cylindrical hole (301) and is spirally connected to the control nail marking cap (3), and the inner wall of the column tube (6) is rotatably connected to the control nail head (2); a waterproof ring (7) is arranged on the top cover (5), and the waterproof ring (7) is in contact with the upper surface of the control nail marking cap (3).

2. The expansion control point measuring nail according to claim 1, characterized in that: A thread groove (302) communicating with the inner side of the columnar hole (301) is provided on the outer wall of the columnar hole (301), and a spiral tooth is provided on the outer side of the column tube (6), the spiral tooth is located on the inner side of the thread groove (302) and is spirally connected to the thread groove (302).

3. The expansion control point measuring nail according to claim 1, characterized in that: The control nail head (2) is a prismatic nail head, and a cross groove opening upward is provided on the control nail head (2).

4. The expansion control point measuring nail according to claim 1, characterized in that: A central mark point (502) is arranged in the top cover (5) and is in a straight line with the axis thereof, and a plurality of protrusions (501) are arranged on the upper surface of the top cover (5) around the central mark point (502).

5. The expansion control point measuring nail according to claim 1, characterized in that: An annular groove is provided on the arc surface of the top cover (5), a limiting ring is provided on the inner side of the waterproof ring (7), and the limiting ring is inserted into the annular groove and rotatably connected thereto.

6. The expansion control point measuring nail according to claim 1, characterized in that: A warning mark is provided on the upper surface of the control nail marking cap (3), and a perspective window (701) corresponding to the warning mark is provided on the waterproof ring (7).

7. The expansion control point measuring nail according to claim 1, characterized in that: The top cover (5) is an anti-corrosion cover, and the waterproof ring (7) is an anti-corrosion ring.

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