CN211696413U - Marking device - Google Patents

Abstract

The utility model relates to a marking device. The marking device includes: the mark main body comprises an embedded part for embedding a concrete filling area and a mark part fixedly connected with the upper end of the embedded part, and the bottom surface of the mark part is contacted with the top surface of the concrete filling area; the upper end of the hollow sleeve is flush with the ground, and the lower end of the hollow sleeve extends into the lower part of the mark part; wherein the logo portion and at least a portion of the embedded portion are located within the hollow sleeve; the cover plate is used for sealing the opening at the upper end of the hollow sleeve, and the top surface of the cover plate is flush with the ground. The utility model discloses a cavity sleeve forms protection device with the apron, and this protection device can realize making the mark portion reliable and stable to the effective protection of mark portion, and the position is accurate.

Description

Marking device

Technical Field

The utility model relates to a measurement engineering technical field especially relates to a marking device.

Background

The measurement control point means a series of points arranged within the area to be measured before the measurement work is performed to complete the measurement work for the entire area. A series of measurement control points form a control network for acquiring plane coordinates or elevations of a certain point in space.

The urban railway belongs to a novel rail transit form, and the line needs to be accurately measured through a control point marking device before the urban railway inter-city rail transit line is established. However, the lines are mostly located in urban main roads, urban land features are complex, and the number of places for embedding control point marks is small.

The control point marking device is usually buried on the ground, and the control point marking head is exposed above the ground and is easy to be crushed by vehicles and damaged by pedestrians; the control point marker head is buried under the ground, the stability of the marker head is not high due to the lack of a good protection device, a deep pit needs to be dug to meet the stability and the position accuracy of the marker head, but the deep pit can break a complex urban traffic pipeline circuit which is 0.7-1.5 meters below the ground level, the operation risk is high, the engineering quantity is large, and the damage degree to the road surface is large.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a sign device to solve the technical problem of how to improve the protection of the stability of the sign portion. In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an embodiment of the utility model provides a marking device, this marking device includes: the mark main body comprises an embedded part for embedding a concrete filling area and a mark part fixedly connected with the upper end of the embedded part, and the bottom surface of the mark part is contacted with the top surface of the concrete filling area; the upper end of the hollow sleeve is flush with the ground, and the lower end of the hollow sleeve extends into the lower part of the mark part; wherein the logo portion and at least a portion of the embedded portion are located within the hollow sleeve; the cover plate is used for sealing the opening at the upper end of the hollow sleeve, and the top surface of the cover plate is flush with the ground.

Further, the inner surface of the hollow sleeve is in contact with the edge of the concrete filled area.

Further, the distance between the ground and the bottom surface of the concrete filling area is not more than 0.3 m.

Further, the marker portion includes: the bottom surface of the chassis is in contact with the top surface of the concrete filling area; the mark head is fixedly connected with the upper surface of the chassis and is positioned in a hollow accommodating cavity formed by the hollow sleeve; wherein the width of the chassis is greater than the width of the sign head and the width of the buried portion.

Furthermore, the embedded part comprises a vertical rod body connected with the chassis and an arc-shaped hook body connected with the rod body.

Further, the inner surface of the hollow sleeve is provided with a protrusion for supporting the cover plate, and the distance from the upper surface of the protrusion to the ground is equal to the thickness of the cover plate.

Further, the protrusions are arranged in a circle along the circumferential direction of the inner surface of the hollow sleeve.

Further, the lower surface of the protrusion is flush with the lower end of the hollow sleeve.

Further, the marking device is arranged in a mounting hole which is formed downwards from the ground.

Further, concrete and/or fixing glue are filled between the outer wall of the hollow sleeve and the wall surface of the mounting hole.

An embodiment of the utility model provides a marking device, including marking main part, hollow sleeve and apron, hollow sleeve's upper end and ground parallel and level, the lower extreme stretches into the below of mark portion and is fixed by the concrete, and the apron is used for sealing hollow sleeve's upper end opening, and the mark portion is located hollow sleeve's cavity. Through the arrangement, the mark part is positioned below the ground, so that the mark main body is prevented from being unconsciously damaged by vehicles and pedestrians; the hollow sleeve and the cover plate form a protection device, which not only plays a role of supporting ground vehicles and pedestrians, but also plays a role of blocking soil around the mark part; the protection device and the mark main body are designed in a separated mode, so that even if the protection device is slightly displaced longitudinally, the position of the mark main body can be guaranteed not to change, the stability and the position accuracy of the marking main body are protected, the mark main body can be well protected without deep pit digging and burying, the device is simple, and construction is simplified.

Drawings

FIG. 1 is a schematic view of a marking device provided by an embodiment of the present invention

Fig. 2 is a front view of a sign body according to an embodiment of the present invention;

fig. 3 is a top view of a sign body according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a hollow sleeve and a cover plate according to an embodiment of the present invention;

fig. 5 is a schematic structural view of another hollow sleeve and cover plate according to an embodiment of the present invention;

fig. 6 is a schematic view of a mounting hole provided in an embodiment of the present invention.

Description of reference numerals:

1-marking device, 10-marking main body, 20-hollow sleeve, 30-cover plate, 40-concrete filling area, 11-embedded part, 12-marking part, 111-rod body, 112-hook body, 121-base plate, 122-marking head, 1221-marking point, 21-bulge, 22-connecting mechanism, 211-upper surface, 212-lower surface and 2-mounting hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various combinations of the specific features in the present invention are not separately described.

It should be understood that the references to "above", "below", "upper end" and "lower end" are all intended to refer to the orientation during normal use.

In a specific embodiment, the utility model provides a marking device is used for measuring engineering technical field, and this marking device is applicable to and establishes the precision measurement control net in the intensive urban area of urban area railway, still is applicable to in other areas, for example, the region such as airport, harbour, underground tunnel carries out the precision measurement with the orientation. The utility model discloses an environment or scene that the mark device was used do not produce the restriction to the mark device.

As shown in fig. 1, the marker device 1 includes a marker main body 10, a hollow sleeve 20, and a cover plate 30.

As shown in fig. 1, the marker main body 10 includes an embedded portion 11 and a marker portion 12. The embedded portion 11 is used for embedding the concrete filling region 40; the sign portion 12 is fixedly connected to the upper end of the embedded portion 11, and the bottom surface of the sign portion 12 is in contact with the top surface of the concrete filled region 40.

Specifically, a space having an accommodation function is opened downward from the ground to dispose the sign body 10 therein. Concrete can be filled in the bottom of the space to form a concrete filling area 40; the sign body 10 is partially inserted into the concrete fill area 40 before the concrete is cured. Specifically, the embedded part 11 of the sign main body 10 is embedded in concrete, and the sign main body 10 is fixed and positioned along with the curing and molding of the concrete; the sign portion 12 protrudes from the concrete for the user to find and locate the sign body. The top center of the marker body 10 may have a marker point that is a known point of measurement from which the planar coordinates or elevation of an unknown point can be measured.

Alternatively, the sign body 10 may be an integrally formed structure, or the embedded portion 11 and the sign portion 12 may be fixedly connected by welding or screwing. The sign body 10 may be made of stainless steel, and has a stable structure and is not easily deformed.

As shown in fig. 1, the hollow sleeve 20 has an upper end flush with the ground and a lower end extending below the sign portion 12; namely: the hollow sleeve 20 extends from the surface all the way down to below the sign 12.

Specifically, the hollow sleeve 20 is cylindrical, has an open upper end and an open lower end, and has a cavity formed therein that communicates with the open upper end, and the cavity is adapted to receive the sign portion 12. The upper end of the hollow sleeve 20 is flush with the ground, which is the surface of the ground on which vehicles and pedestrians can travel.

The flag 12 and at least a portion of the embedded portion 11 are located within the hollow sleeve 20, i.e., the flag 12 is located within a cavity of the hollow sleeve 20 and the embedded portion 11 below the flag 12 is at least partially located within the cavity of the hollow sleeve 20. The distance that the hollow sleeve 20 extends below the sign portion 12, that is, the distance that the hollow sleeve 20 extends into the concrete filling area 40, can be set in consideration of the fixing stability of the hollow sleeve 20 and the material cost of the hollow sleeve 20.

Alternatively, the outer diameter of the hollow sleeve 20 may be about 0.13m, and the inner diameter may be about 0.11 m. The length of the hollow sleeve 20 in the axial direction may be about 0.10 m.

Alternatively, the hollow sleeve 20 may be made of a galvanized iron material, have high corrosion resistance,

as shown in fig. 1, a cover plate 30 is used to close the opening of the upper end of the hollow sleeve 20, and the top surface of the cover plate 30 is flush with the ground. That is, the hollow sleeve 20 is formed with a cavity, the cover plate 30 closes the upper opening of the cavity and the top surface of the cover plate 30 is flush with the ground, the hollow sleeve 20 and the cover plate 30 together form a protection device of the sign portion 12 that hides the sign body below the ground, prevents unintended damage to the sign portion 12 by vehicles and pedestrians on the ground, and at the same time protects the influence on the stability of the sign portion 12 from accidental cracking or ash shedding of the hardened layer on the peripheral side of the sign portion 12.

It should be noted that the cover 30 can be lifted up, so that the mark 12 under the cover 30 can be found. Optionally, the edge of the cover 30 may be provided with a small hole for the operator to lift the cover 30.

Alternatively, the cover plate 30 and the hollow sleeve 20 may be movably connected by the connection mechanism 22 such that the cover plate 30 may move and/or rotate within a certain range relative to the hollow sleeve 20. The connecting mechanism 22 may be a hinge, one end of the hinge is connected to the inner wall of the hollow sleeve 20, the other end of the hinge is connected to the bottom surface of the cover plate 30, and the connecting mechanism is located in the cavity of the hollow sleeve 20.

Alternatively, the cover plate 30 may be constructed of an iron nickel plated material that is highly stable in air and resistant to corrosion by atmospheric gases, alkalis and certain acids; and considering that the top surface of the cover plate is exposed above the ground for rolling by vehicles and pedestrians, the iron nickel plated material has a relatively high hardness, and can improve the wear resistance of the surface of the cover plate 30.

Alternatively, in view of saving material cost, the hollow sleeve and/or the cover plate can also be made of hard plastics, the cost can be saved by half and the mechanical property requirement can be met.

With the above arrangement, the sign body 10 is arranged below the ground and fixed by concrete, the sign portion 12 exposed above the concrete filling area 40 and below the ground can be found, the hollow sleeve 20 on the periphery side of the sign portion 12 and the cover plate 30 on the upper side of the sign portion 12 form a protection device, and unintended damage of vehicles and pedestrians on the road surface to the sign portion 12 is avoided, and meanwhile, the influence of cracking of a road hardened layer on the periphery side of the sign portion 12 or falling of ash slag on the sign portion 21 is avoided; in addition, the protective device formed by the hollow sleeve 20 and the mark part 12 is separated from the mark main body, the structural design avoids the situation that the mark part 12 is displaced due to slight movement of the protective device along the axial direction under the downward pressure of ground vehicles and pedestrians, and the mark part 12 is stable and reliable and has accurate position.

In some embodiments, as shown in fig. 1, the inner surface of the hollow sleeve 20 is in contact with the edge of the concrete fill area 40. That is, the hollow sleeve 20 extends into the portion below the sign 12 with its inner wall contacting the concrete. That is, the lower end of the hollow sleeve 20 protrudes into the concrete filling area 40 below the sign portion 12 and is fixed by concrete, and the cured concrete restricts the displacement of the hollow sleeve 20 in the axial direction and prevents the hardened layer material on the outer peripheral side of the hollow sleeve 20 from being cracked, ensuring the positional stability of the hollow sleeve 20, thereby protecting the positional stability and accuracy of the sign portion 12 located in the cavity of the hollow sleeve 20.

In some embodiments, as shown in FIG. 1, the ground is no more than 0.3 meters from the bottom surface of the concrete fill area 40. I.e. the depth of ground occupied by the buried marker 1 is no more than 0.3 m. Because cavity sleeve 20 holds sign portion 12 in its cavity holds the intracavity, apron 30 will the top opening that holds the chamber is sealed, has protected sign portion 12 to avoid the influence of subaerial vehicle and pedestrian, also protects the road layer material of sign portion week side to the influence of sign portion, and simultaneously, sign portion 12 is fixed in the concrete, has guaranteed the stability of sign portion 12, the enclosure space that cavity sleeve and apron and concrete enclose is firm reliable, the position stability of the sign portion in the cavity has been protected, the position accuracy nature of the mark point on the sign portion has been guaranteed, make the buried depth of mark device 1 only need 0.3m, need not occupy great ground depth.

The marker 1 is buried to a depth of not more than 0.3m, which is a depth of a hardened layer on the ground and does not enter a water-stable layer. Because urban rail transit line is in the water steady layer below the sclerosis layer mostly, and the degree of depth is about 0.7-1.5, consequently, the mark device of this application can not cause the influence to burying darker circuit underground, reduces the operation risk.

Optionally, the distance from the ground to the bottom surface of the sign 12 is not less than 0.05m, which facilitates the fixing of the sign body 10 in concrete by the installation tool and the space for accommodating the sign; the distance from the bottom surface of the mark part 12 to the bottom surface of the concrete filling area 40 is not less than 0.2m, that is, the height of the concrete filling area along the axis direction is not less than 0.2m, and the deeper concrete filling is beneficial to improving the stability of the concrete, so as to protect the stability of the mark main body buried in the concrete.

In some embodiments, as shown in fig. 2, sign portion 12 includes a chassis 121 and a sign head 122. The chassis 121 is discoid, and the mark head 12 can be the hemisphere, also can be the shape that hemisphere and cylinder are connected, and the bottom surface of mark head 12 is connected with the last fixed surface of chassis 121, and mark head 122 can coaxial setting with chassis 121, is favorable to the accurate positioning of mark head 122. The marker head 122 is located within a hollow receiving cavity formed by the hollow sleeve 20.

Optionally, as shown in fig. 3, the center of the marking head 122 has a cross-shaped mark, and the intersection point of the cross-shaped mark is a marking point 1221, which accurately represents the coordinates and elevation of the position. The landmark point 1221 is a known measurement point, and the plane coordinates or elevation of an unknown point can be measured by combining the plane coordinates of another known point or combining a level gauge. In order to record the plane coordinates or elevation of the landmark point 1221, optionally, the upper surface of the chassis 121 may be used to record the position information of the landmark point 1221. Optionally, the cross-shaped mark can be engraved on the mark head 122 by a laser engraving process, so that the mark is clear and is not easy to damage.

As shown in fig. 1 and 2, the bottom plate 121 is fixedly connected to the embedded part 11, the bottom surface of the bottom plate 121 contacts the top surface of the concrete filling area 40, and the width of the bottom plate 121 is greater than the width of the marking head 122 and the width of the embedded part 11.

In particular, the width refers to the maximum length of the object in the radial direction. The bottom plate 121 is in contact with the top surface of the concrete-filled region 40 and has a width greater than the width of the marking head 122 and the width of the buried part 11. This arrangement, on the one hand, facilitates increasing the contact area of the flag 12 with the concrete-filled area 40, preventing the displacement of the flag head 122 along the axial direction, and on the other hand, the flag head 12 is disposed in the middle of the chassis, increasing the width of the chassis facilitates the positioning of the center of the flag 12 at the set point, thereby making the position of the flag more accurate. In addition, the width of the chassis is larger, so that the area of the top surface of the chassis is larger, which is beneficial to reserving space for recording the position information of the mark point on the mark part 12.

Alternatively, the width of the chassis 121 is about 0.11m, the width of the marker head 122 is about 0.02m, and the width of the embedded portion 11 is about 0.018 m.

It will be appreciated that in order for the flag 12 to be located within the cavity of the hollow sleeve 20, the width of the base plate 121 is no greater than the internal diameter of the hollow sleeve 20.

In some embodiments, as shown in fig. 2, the embedded part 11 includes a vertical rod 111 connected to the bottom plate 121 and an arc-shaped hook 112 connected to the rod. That is, the marker main body 10 is fixed by embedding the embedded portion 11 in concrete, and the structure embedded in concrete is a vertical rod 111 and an arc-shaped hook 112 connected to the rod.

Alternatively, the number of the arc-shaped hooks 112 may be one or more, and when there are a plurality of the arc-shaped hooks, the number may be uniformly distributed around the circumference of the rod 111.

Optionally, the length of the embedded portion 11 along the axial direction is about 0.12m, wherein the length of the vertical rod 111 along the axial direction is about 0.1m, the arc hook 112 may be in a half-arc shape with a radius of about 0.01m, one end of the half-arc shape is connected with the bottom end of the rod, and the other end is surrounded by concrete.

Through the arrangement, the vertical rod body 111 limits the movement of the sign main body 10 along the radial direction, and meanwhile, the arc-shaped hook body 112 limits the movement of the sign main body 10 along the axial direction, so that the position stability of the sign main body 10 is ensured.

In some embodiments, as shown in fig. 4 and 5, the inner surface of the hollow sleeve 20 is provided with protrusions 21, namely: the protuberance 21 protrudes towards the cavity formed by the hollow sleeve 20 with respect to the inner surface of the hollow sleeve 20; the protrusion 21 serves to support the cover plate 30, and the upper surface 211 of the protrusion 21 is spaced from the ground by a distance equal to the thickness of the cover plate 30.

Specifically, the hollow sleeve 20 is an integrally formed structure, the inner surface of the hollow sleeve 20 is provided with a protrusion 21 extending in the axial direction, and the protrusion 21 may be provided in one circle along the circumferential direction of the inner surface of the hollow sleeve 20, or may be provided in a plurality of circles along the circumferential direction of the inner surface of the hollow sleeve 20. The distance from the upper surface 211 of the projection 21 to the ground is equal to the thickness of the cover plate 30, so that the cover plate 30 is located in the cavity of the hollow sleeve above the projection 21, and the bottom surface of the cover plate 30 abuts the upper surface 211 of the projection 21 and the top surface of the cover plate 30 is flush with the ground. The matching arrangement of the hollow sleeve 20 and the cover plate 30 is simple and ingenious, the cover plate 30 plays a role of supporting and isolating vehicles and pedestrians on the ground, the hollow sleeve 20 plays a role of supporting the cover plate 30, and the hollow cavity of the hollow sleeve 20 is not required to be internally fixed with a support rod for supporting the cover plate 20, such as concrete, so as to influence the stability of the sign part 21, or the ground supports the cover plate 30, so that the traffic on the ground is influenced by the unevenness of the ground and the cover plate 30. The hollow sleeve 20 and the cover plate 30 form a mark part 21 protection device, so that the function of supporting vehicles and pedestrians on the ground is achieved, meanwhile, the protection device and concrete form a closed space, firmness and reliability are achieved, and the stability of the mark part 21 is guaranteed.

Optionally, the distance from the upper surface 211 of the protrusion 21 to the ground and the thickness of the cover plate 30 are both 0.05 m; the hollow sleeve 20 above the protrusion 21 has an inner diameter of 0.12m and the cover plate 30 has a diameter of 0.118 m. The specific dimensions of the hollow sleeve 20 and the cover plate 30 may be set according to the actual circumstances, as long as it is satisfied that the cover plate 30 can be received in the cavity above the protrusion 21 of the hollow sleeve 20 and can be supported by the protrusion 21, while the top surface of the cover plate 30 is flush with the ground.

In some embodiments, as shown in fig. 4 and 5, the protrusions 21 are arranged in one turn in the circumferential direction of the inner surface of the hollow sleeve 20. That is, the projection 21 is provided in one turn around the axial direction of the hollow sleeve 20. With this arrangement, the contact area of the protrusion 21 with the hollow sleeve 20 is increased, so that the stability of the protrusion 21 is enhanced, and the supporting effect of the protrusion 21 on the cover plate 30 and the vehicles and pedestrians pressed thereon and formed on the cover plate 30 is enhanced.

It should be noted that the length of the protrusion 21 along the axial direction can be adjusted according to the force condition. Specifically, as shown in fig. 4, the length of the protrusion 21 in the axial direction may be 0.05m, which saves material, and increases the volume of the middle receiving cavity of the hollow sleeve to accommodate the larger-sized sign 21, while the protrusion 21 structure can satisfy the requirement of supporting vehicles and pedestrians on the cover plate 30 and the cover plate 30.

In some embodiments, as shown in FIG. 5, the lower surface 212 of the projection 21 is flush with the lower end of the hollow sleeve 20.

Specifically, the length of the protrusion 21 in the axial direction is long, the lower surface 212 of the protrusion 21 is flush with the lower end of the hollow sleeve 20, the arrangement is simple, the support of the protrusion 21 on the cover plate 30 is enhanced, and the fixing and the stabilizing are realized.

In some embodiments, as shown in fig. 1 and 6, the marker device 1 is disposed in a mounting hole 2 bored downward from the ground.

Specifically, the ground is provided with a mounting hole 2 downwards, the mounting hole 2 can be formed by drilling with a drill bit, and the drill hole can be a water drill. The marking device 1 is arranged in the mounting hole 2, the opening depth of the mounting hole 2 is not more than 0.3m, and pipeline lines buried underground cannot be damaged; and due to the arrangement of the protection device of the hollow sleeve 20 and the cover plate 30, the good stability of the mark part 21 can be ensured when the opening depth of the mounting hole 2 is not more than 0.3 m.

In some embodiments, as shown in fig. 1 and 6, concrete and/or fixing glue is filled between the outer wall of the hollow sleeve 20 and the wall surface of the mounting hole 2.

Specifically, the diameter of the mounting hole 2 is larger than the outer wall diameter of the hollow sleeve 20 so that the hollow sleeve 20 can be disposed within the mounting hole 2. Alternatively, the diameter of the mounting hole 2 may be 0.132-0.14m, and the diameter of the outer wall of the hollow sleeve 20 may be 0.13 m. The gap between the outer wall of the hollow sleeve 20 and the wall surface of the mounting hole 2 is filled with concrete and/or fixing glue to enhance the stability of the hollow sleeve 20, thereby protecting the stability of the sign part 21.

For a clearer understanding of the marking device of the present invention, the following description will be given of the steps of installing the marking device of the present invention. It can be understood that the installation method of the marking device is only used for understanding the marking device provided by the present invention, and is not used for limiting the marking device of the present invention.

Firstly, a drill bit, such as a water drill, is used for drilling a mounting hole in an asphalt or cement pavement, the diameter of the mounting hole is about 0.132-0.140m, the depth of the mounting hole is not more than 0.3m, and the mounting hole penetrates through a road surface layer structure and is positioned in a road hardened layer structure.

Then, concrete is poured in the installation space to a concrete pouring depth of not less than 0.2m, and an upper space is reserved to accommodate the sign. The main mark body extends into the concrete, wherein the embedded part of the main mark body is embedded in the concrete, the mark part of the main mark body is positioned above the concrete and in the mounting hole, the mark part is stably mounted, and a clear and definite mark point is arranged above the middle part of the mark part.

Then, a hollow sleeve is placed in the mounting hole, the upper end of the hollow sleeve is flush with the ground, the lower end of the hollow sleeve extends into the concrete below the mark part and is fixed through the concrete, and the mounting part and at least part of the embedded part are positioned in a cavity of the hollow sleeve; and filling a gap between the outer wall of the hollow sleeve and the wall surface of the mounting hole by using concrete and/or fixing glue so as to firmly mount the hollow sleeve.

Finally, the upper end opening of the hollow sleeve is sealed by using a cover plate, the top surface of the cover plate is flush with the ground, and vehicles and pedestrians run on the ground and the top surface of the cover plate; when the marking device is needed to be used for measurement, the marking head can be seen by opening the cover plate, and the unknown point is measured by using the known position information of the marking point of the marking head.

The above only be the preferred embodiment of the present invention, not therefore the restriction of the patent scope of the present invention, all are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the description and the attached drawing was done, or direct/indirect application all is included in other relevant technical field the patent protection scope of the present invention.

Claims (10)

1. A sign device, comprising:

the mark main body comprises an embedded part for embedding a concrete filling area and a mark part fixedly connected with the upper end of the embedded part, and the bottom surface of the mark part is contacted with the top surface of the concrete filling area;

the upper end of the hollow sleeve is flush with the ground, and the lower end of the hollow sleeve extends into the lower part of the mark part; wherein the logo portion and at least a portion of the embedded portion are located within the hollow sleeve;

the cover plate is used for sealing the opening at the upper end of the hollow sleeve, and the top surface of the cover plate is flush with the ground.

2. The marking device of claim 1, wherein an inner surface of said hollow sleeve contacts an edge of said concrete fill area.

3. The marking device of claim 2 wherein said ground is spaced from the bottom surface of said concrete fill area by a distance of no more than 0.3 meters.

4. The marking device according to claim 1, wherein the marking portion comprises:

the bottom surface of the chassis is in contact with the top surface of the concrete filling area;

the mark head is fixedly connected with the upper surface of the chassis and is positioned in a hollow accommodating cavity formed by the hollow sleeve;

wherein the width of the chassis is greater than the width of the sign head and the width of the buried portion.

5. The marking device of claim 4 wherein said embedded portion comprises an upright post connected to said base and an arcuate hook connected to said post.

6. The marking device according to claim 1, wherein the inner surface of the hollow sleeve is provided with a projection for supporting the cover plate, the upper surface of the projection being spaced from the ground surface by a distance equal to the thickness of the cover plate.

7. The marker device of claim 6 wherein said protrusion is circumferentially disposed about the inner surface of said hollow sleeve.

8. The marking device of claim 6 wherein the lower surface of said projection is flush with the lower end of said hollow sleeve.

9. The marking device of any one of claims 1 to 8, wherein said marking device is disposed within a mounting hole formed downwardly from said ground surface.

10. The marking device according to claim 9, wherein concrete and/or a fixing glue is filled between the outer wall of the hollow sleeve and the wall surface of the mounting hole.

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