阅读说明：本技术 超声回弹法检测混凝土梁柱构件强度用测点定位装置 (Measuring point positioning device for detecting strength of concrete beam column member by ultrasonic rebound method ) 是由 刘广业 董博海 吴秉义 郭晶 范国友 杜汉强 孙清华 于 2020-05-21 设计创作，主要内容包括：本发明提供一种超声回弹法检测混凝土梁柱构件强度用测点定位装置,提高混凝土梁柱构件测点定位的准确性和定位效率。所述测点定位装置包括第一定位部和第二定位部,第一定位部包括矩形外框和定位网,矩形外框包括上横杆、下横杆、左连接竖杆和右连接竖杆,定位网包括左定位竖杆、右定位竖杆和正方形网体,正方形网体具有多个正方形网格,第二定位部与第一定位部结构相同且与第一定位部由左连接纵杆及右连接纵杆可拆卸地连接为一体。采用本发明测点定位装置,大大提高了超声回弹综合法检测混凝土梁或柱强度时测点的定位效率和准确性,提高了检测精度。(The invention provides a measuring point positioning device for detecting the strength of a concrete beam column member by an ultrasonic rebound method, which improves the accuracy and the efficiency of positioning measuring points of the concrete beam column member. Measurement station positioner includes first location portion and second location portion, and first location portion includes rectangle frame and positioning network, and the rectangle frame includes horizontal pole, sheer pole, left side connection montant and right side connection montant, and positioning network includes left side location montant, right side location montant and square dictyosome, and square dictyosome has a plurality of square grids, and second location portion is the same with first location portion structure and is connected the vertical pole by a left side and the right side and connect the vertical pole detachably and be connected as an organic whole with first location portion. By adopting the measuring point positioning device, the positioning efficiency and accuracy of the measuring point when the strength of the concrete beam or column is detected by the ultrasonic rebound synthesis method are greatly improved, and the detection precision is improved.)

1. The utility model provides an supersound resilience method detects concrete beam column component measuring point positioner for intensity which characterized in that includes:

the first positioning part is a vertically arranged rectangular frame structure and comprises a rectangular outer frame and a positioning net positioned in the rectangular outer frame, the rectangular outer frame comprises an upper cross rod, a lower cross rod, a left connecting vertical rod and a right connecting vertical rod, the upper cross rod, the right connecting vertical rod, the lower cross rod and the left connecting vertical rod are sequentially connected into a rectangle, the positioning net comprises a left positioning vertical rod, a right positioning vertical rod and a square net body positioned between the left positioning vertical rod and the right positioning vertical rod, the top end of the left positioning vertical rod and the top end of the right positioning vertical rod are both connected with the upper cross rod, the bottom end of the left positioning vertical rod and the bottom end of the right positioning vertical rod are both connected with the lower cross rod, the left side and the right side of the square net body are respectively connected with the left positioning vertical rod and the right positioning vertical rod, the square net body is provided with a plurality of square grids formed by crossing a plurality of transverse line bodies and a plurality of vertical line bodies which are the same in number; the upper cross rod, the lower cross rod, the left connecting vertical rod, the right connecting vertical rod, the left positioning vertical rod and the right positioning vertical rod are all rigid rods;

the second positioning part is the same as the first positioning part in structure and is arranged opposite to the first positioning part in the front-back direction, and the second positioning part and the first positioning part are detachably connected into a whole through a left connecting longitudinal rod and a right connecting longitudinal rod which are positioned at two sides of the second positioning part.

2. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 1,

a through connecting hole is formed in each of the left connecting vertical rod of the first positioning portion and the left connecting vertical rod of the second positioning portion, the first end of the left connecting longitudinal rod is inserted into the connecting hole of the left connecting vertical rod of the second positioning portion and is positioned by a pin, a threaded hole coaxial with the left connecting longitudinal rod is formed in the second end of the left connecting longitudinal rod, the second end of the left connecting longitudinal rod is matched and fastened with the threaded hole by a bolt, and the bolt is inserted into the connecting hole in the left connecting vertical rod of the first positioning portion;

the montant is connected on the right side of first location portion with all be formed with the connecting hole that link up on the right side connecting montant of second location portion, the first end of connecting the vertical pole on the right side is inserted and is established in the connecting hole of connecting the vertical pole on the right side of second location portion and by a pin location, the second end of connecting the vertical pole on the right side is formed with rather than coaxial screw hole, the second end of connecting the vertical pole on the right side by a bolt with screw hole cooperation fastening, just the bolt is inserted and is established in the connecting hole on the right side connecting the montant of first location portion.

3. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 2,

the left side of first locating part is connected montant accessible connecting hole and is followed the length direction of left side connection montant slides, and the right side of first locating part is connected montant accessible connecting hole and is followed the length direction of right side connection montant slides.

4. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 1,

the left side location montant with the right side location montant all can be followed go up the horizontal pole with the length direction of horizontal pole slides down, just the top of left side location montant with go up the horizontal pole and be equipped with the location structure of mutually supporting, in order to fix a position left side location montant, the top of right side location montant with it is equipped with the location structure of mutually supporting to go up the horizontal pole, in order to fix a position right side location montant.

5. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 4,

the top end and the bottom end of the left positioning vertical rod are respectively provided with a first through hole which is transversely arranged, the top end of the left positioning vertical rod is slidably sleeved on the upper cross rod through the first through hole, and the bottom end of the left positioning vertical rod is slidably sleeved on the lower cross rod through the first through hole;

the top and the bottom of right side location montant all are formed with the second perforating hole of horizontal setting, the top of right side location montant is passed through second perforating hole slidable ground cover is established on the last horizontal pole, the bottom of right side location montant is passed through second perforating hole slidable ground cover is established on the sheer pole.

6. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 5,

the upper cross rod is provided with positioning marks for positioning the positioning net, and the positioning marks of the two upper cross rods are arranged oppositely.

7. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 5,

the upper cross rod and the lower cross rod can stretch along the respective length directions;

the left connecting vertical rod and the right connecting vertical rod can slide along the length direction of the upper cross rod and the lower cross rod;

the square net body is a soft net body.

8. The ultrasonic rebound method detecting concrete beam column member strength measuring point positioning device according to claim 7,

the bottom surface of the upper cross bar is provided with a rail groove extending along the length direction of the upper cross bar, and the top surface of the lower cross bar is provided with a rail groove extending along the length direction of the lower cross bar;

the top end of the left connecting vertical rod is embedded into the track groove of the upper cross rod and is in sliding fit with the track groove, and the bottom end of the left connecting vertical rod is embedded into the track groove of the lower cross rod and is in sliding fit with the track groove;

the top end of the right connecting vertical rod is embedded into the track groove of the upper cross rod and is in sliding fit with the track groove, and the bottom end of the right connecting vertical rod is embedded into the track groove of the lower cross rod and is in sliding fit with the track groove.

Technical Field

The invention belongs to the field of concrete strength detection, and particularly relates to a measuring point positioning device used for detecting the strength of a concrete beam column member by adopting an ultrasonic rebound synthesis method.

Background

The ultrasonic rebound comprehensive method is a method for respectively measuring sound and rebound values in the same measuring area of a concrete member by adopting an ultrasonic instrument and a rebound instrument and then calculating the compressive strength of the concrete in the measuring area by utilizing an established strength measuring formula. In the detection process, a rebound detection area needs to be drawn on the concrete member on site to determine a detection point.

For a square concrete beam-column member, the plane where the measuring areas are located is two opposite side surfaces of the member, which are referred to as a first side surface and a second side surface, the number of the measuring areas on each side surface is usually not less than 10, and the measuring areas on the first side surface and the second side surface are arranged oppositely, that is, the measuring areas on the first side surface are vertically projected onto the second side surface and should coincide with the measuring areas on the second side surface. And after the measuring areas are determined, measuring points are positioned in each measuring area and marked.

Disclosure of Invention

The invention provides a measuring point positioning device for detecting the strength of a concrete beam column member by an ultrasonic rebound method, which improves the accuracy and the efficiency of positioning measuring points of the concrete beam column member.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an ultrasonic rebound method detects concrete beam column member measuring point positioner for intensity, includes:

the first positioning part is a vertically arranged rectangular frame structure and comprises a rectangular outer frame and a positioning net positioned in the rectangular outer frame, the rectangular outer frame comprises an upper cross rod, a lower cross rod, a left connecting vertical rod and a right connecting vertical rod, the upper cross rod, the right connecting vertical rod, the lower cross rod and the left connecting vertical rod are sequentially connected into a rectangle, the positioning net comprises a left positioning vertical rod, a right positioning vertical rod and a square net body positioned between the left positioning vertical rod and the right positioning vertical rod, the top end of the left positioning vertical rod and the top end of the right positioning vertical rod are both connected with the upper cross rod, the bottom end of the left positioning vertical rod and the bottom end of the right positioning vertical rod are both connected with the lower cross rod, the left side and the right side of the square net body are respectively connected with the left positioning vertical rod and the right positioning vertical rod, the square net body is provided with a plurality of square grids formed by crossing a plurality of transverse line bodies and a plurality of vertical line bodies which are the same in number; the upper cross rod, the lower cross rod, the left connecting vertical rod, the right connecting vertical rod, the left positioning vertical rod and the right positioning vertical rod are all rigid rods;

the second positioning part is the same as the first positioning part in structure and is arranged opposite to the first positioning part in the front-back direction, and the second positioning part and the first positioning part are detachably connected into a whole through a left connecting longitudinal rod and a right connecting longitudinal rod which are positioned at two sides of the second positioning part.

A through connecting hole is formed in each of the left connecting vertical rod of the first positioning portion and the left connecting vertical rod of the second positioning portion, the first end of the left connecting longitudinal rod is inserted into the connecting hole of the left connecting vertical rod of the second positioning portion and is positioned by a pin, a threaded hole coaxial with the left connecting longitudinal rod is formed in the second end of the left connecting longitudinal rod, the second end of the left connecting longitudinal rod is matched and fastened with the threaded hole by a bolt, and the bolt is inserted into the connecting hole in the left connecting vertical rod of the first positioning portion;

the montant is connected on the right side of first location portion with all be formed with the connecting hole that link up on the right side connecting montant of second location portion, the first end of connecting the vertical pole on the right side is inserted and is established in the connecting hole of connecting the vertical pole on the right side of second location portion and by a pin location, the second end of connecting the vertical pole on the right side is formed with rather than coaxial screw hole, the second end of connecting the vertical pole on the right side by a bolt with screw hole cooperation fastening, just the bolt is inserted and is established in the connecting hole on the right side connecting the montant of first location portion.

The montant is connected on the right side of first location portion with all be formed with the connecting hole that link up on the right side connecting montant of second location portion, the first end of connecting the vertical pole on the right side is inserted and is established in the connecting hole of connecting the vertical pole on the right side of first location portion and by a pin location, the second end of connecting the vertical pole on the right side is inserted and is established in the connecting hole of connecting the vertical pole on the left side of second location portion, the second end of connecting the vertical pole on the right side is formed with rather than coaxial screw hole, the second end of connecting the vertical pole on the right side by a bolt with the screw hole cooperation fastening.

The left side of first locating part is connected montant accessible connecting hole and is followed the length direction of left side connection montant slides, and the right side of first locating part is connected montant accessible connecting hole and is followed the length direction of right side connection montant slides.

The left side location montant with the right side location montant all can be followed go up the horizontal pole with the length direction of horizontal pole slides down, just the top of left side location montant with go up the horizontal pole and be equipped with the location structure of mutually supporting, in order to fix a position left side location montant, the top of right side location montant with it is equipped with the location structure of mutually supporting to go up the horizontal pole, in order to fix a position right side location montant.

The top end and the bottom end of the left positioning vertical rod are respectively provided with a first through hole which is transversely arranged, the top end of the left positioning vertical rod is slidably sleeved on the upper cross rod through the first through hole, and the bottom end of the left positioning vertical rod is slidably sleeved on the lower cross rod through the first through hole;

the top end and the bottom end of the right positioning vertical rod are respectively provided with a second through hole which is transversely arranged, the top end of the right positioning vertical rod is slidably sleeved on the upper cross rod through the second through hole, and the bottom end of the right positioning vertical rod is slidably sleeved on the lower cross rod through the second through hole;

the upper cross rod is provided with positioning marks for positioning the positioning net, and the positioning marks of the two upper cross rods are arranged oppositely.

The upper cross rod and the lower cross rod can stretch along the respective length directions;

the left connecting vertical rod and the right connecting vertical rod can slide along the length direction of the upper cross rod and the lower cross rod;

the square net body is a soft net body.

The bottom surface of the upper cross bar is provided with a rail groove extending along the length direction of the upper cross bar, and the top surface of the lower cross bar is provided with a rail groove extending along the length direction of the lower cross bar;

the top end of the left connecting vertical rod is embedded into the track groove of the upper cross rod and is in sliding fit with the track groove, and the bottom end of the left connecting vertical rod is embedded into the track groove of the lower cross rod and is in sliding fit with the track groove;

the top end of the right connecting vertical rod is embedded into the track groove of the upper cross rod and is in sliding fit with the track groove, and the bottom end of the right connecting vertical rod is embedded into the track groove of the lower cross rod and is in sliding fit with the track groove.

Compared with the prior art, when the measuring point positioning device for detecting the strength of the concrete beam column member by adopting the ultrasonic resilience method is used for determining the measuring point of the concrete beam or column member, the first positioning part and the second positioning part are detached firstly, the second positioning part is attached to one side surface of the concrete beam or column member firstly, the second positioning part is placed at a position which meets the requirement that grids of a positioning net of the second positioning part avoid reinforcing steel bars as far as possible so as to improve the detection precision, after the position of the second positioning part is determined, the first positioning part is attached to the other opposite side surface of the concrete beam or column member, the second positioning part and the first positioning part are connected into a whole by the left connecting longitudinal rod and the right connecting longitudinal rod, the upper cross rod, the lower cross rod, the left connecting vertical rod and the right connecting vertical rod of the rectangular outer frame and the left positioning vertical rod and the right positioning vertical rod of the positioning net are specifically configured into rigid rods, and the first positioning part and the second positioning part meet the requirements that the first positioning part and the second positioning part are connected The positioning net is arranged oppositely, so that the position of the first positioning part can be determined, the positions of the positioning nets on the first positioning part and the second positioning part are determined simultaneously, and because each grid of the positioning net is a measuring point, the positions of the measuring points on two opposite side surfaces of the concrete beam or column member are determined simultaneously, the positioning efficiency and the positioning accuracy of the measuring points when the strength of the concrete beam or column is detected by the ultrasonic rebound synthesis method are greatly improved, and the detection accuracy is further improved.

Drawings

FIG. 1 is a schematic view of an expanded state of a measuring point positioning device for detecting the strength of a concrete beam column member by an ultrasonic rebound method;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of section C of FIG. 1;

FIG. 5 is a schematic view of a folded state of the measuring point positioning device for detecting the strength of a concrete beam column member by an ultrasonic rebound method according to the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

fig. 7 is an enlarged view of a portion B of fig. 5.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1 to 4, the measuring point positioning device for detecting the strength of a concrete beam column member by an ultrasonic rebound method in the embodiment includes:

the first positioning part 100 is a vertically arranged rectangular frame structure and comprises a rectangular outer frame 110 and a positioning net 120 positioned inside the rectangular outer frame 110, the rectangular outer frame 110 comprises an upper cross rod 111, a lower cross rod 112, a left connecting vertical rod 113 and a right connecting vertical rod 114, the upper cross rod 111 and the lower cross rod 112 are both horizontally and transversely arranged rigid rods, the left connecting vertical rod 113 and the right connecting vertical rod 114 are both vertically arranged rigid rods, and the upper cross rod 111, the right connecting vertical rod 114, the lower cross rod 112 and the left connecting vertical rod 113 are sequentially connected into a rectangle; the positioning net 120 comprises a left positioning vertical rod 121, a right positioning vertical rod 122 and a square net body 123 positioned between the left positioning vertical rod 121 and the right positioning vertical rod 122, the left positioning vertical rod 121 and the right positioning vertical rod 122 are rigid rods which are vertically arranged, the top end of the left positioning vertical rod 121 and the top end of the right positioning vertical rod 122 are both connected with an upper cross rod 111, the bottom end of the left positioning vertical rod 121 and the bottom end of the right positioning vertical rod 122 are both connected with a lower cross rod 112, the left side and the right side of the square net body 123 are respectively connected with the left positioning vertical rod 121 and the right positioning vertical rod 122, and the square net body 123 is provided with a plurality of square grids 124 formed by crossing a plurality of transverse line bodies and;

the second positioning portion 200 has the same structure as the first positioning portion 100 and is disposed opposite to the first positioning portion in the front-rear direction, and the second positioning portion 200 and the first positioning portion 100 are detachably connected to each other by a left connecting vertical rod 300 and a right connecting vertical rod 400 located at both sides thereof. The left connecting vertical rod 300 and the right connecting vertical rod 400 are rigid rods extending in the horizontal longitudinal direction.

Specifically, when the ultrasonic rebound method is used to detect the strength of the concrete beam or column member and determine the measurement point of the concrete beam or column member by using the measurement point positioning device in this embodiment, the first positioning portion 100 and the second positioning portion 200 are detached first, the second positioning portion 200 (or the first positioning portion 100) is attached to one side surface of the concrete beam or column member first, the second positioning portion 200 is placed at a position where the mesh 123 of the positioning net 120 avoids the steel bars as much as possible, so as to improve the detection accuracy, after the position of the second positioning portion 200 is determined, the first positioning portion 100 is attached to the other opposite side surface of the concrete beam or column member, the second positioning portion 200 and the first positioning portion 100 are connected into a whole by the left connecting vertical rod 300 and the right connecting vertical rod 400, the upper cross rod 111, the lower cross rod 112, the left connecting vertical rod 113 and the right connecting vertical rod 114, and the left positioning vertical rod 121 and the right positioning vertical rod 122 of the positioning net 120 are specifically configured as rigid, the first positioning part 100 and the second positioning part 200 are connected by the left connecting vertical rod 300 and the right connecting vertical rod 400, that is, the first positioning part 100 and the second positioning part 200 are arranged oppositely, so that the position of the first positioning part 100 can be determined, the positions of the positioning nets 120 on the first positioning part 100 and the second positioning part 200, that is, the positions of the measuring areas, are determined simultaneously, and since each grid 124 of the positioning net 120 is a measuring point, the positions of the measuring points on two opposite sides of the concrete beam or column member are determined simultaneously, so that the positioning efficiency and the positioning accuracy of the measuring points when the strength of the concrete beam or column is detected by the ultrasonic springback comprehensive method are greatly improved, and the detection accuracy is further improved; after the measuring areas and the measuring point positions are determined, the measuring points on the measuring areas can be marked by using a pen, then the first positioning part 100 and the second positioning part 200 are detached, the second positioning part 200 is moved to the next position, and the operations are repeated, so that the measuring points on the other measuring area and the measuring area on two opposite side surfaces of the concrete beam or column member can be determined, wherein the number of the measuring areas on each side surface is usually not less than ten.

More specifically, as shown in fig. 1 and 2, the left connecting rod 213 of the second positioning portion 200 is formed with a through connecting hole 2131, the left connecting rod 113 of the first positioning portion 100 is formed with a through connecting hole (not shown), the first end of the left connecting rod 300 is inserted into the connecting hole 2131 of the left connecting rod 213 of the second positioning portion 100 and is vertically inserted by a pin 500 onto the first end of the left connecting rod 300 to position the first end of the left connecting rod 300, the second end of the left connecting rod 300 is formed with a threaded hole (not shown) coaxial therewith, the second end of the left connecting rod 300 is fastened to the left connecting rod 210 by a bolt 600 in a fit manner with the threaded hole, specifically, the rod portion of the bolt 600 passes through the connecting hole on the left connecting rod 113 of the first positioning portion 100 and then fits with the threaded hole on the second end of the left connecting rod 300.

Similarly, a through connection hole (not shown) is formed on the right connecting vertical rod 214 of the second positioning portion 200, a through connection hole (not shown) is formed on the right connecting vertical rod 114 of the first positioning portion 100, the first end of the right connecting vertical rod 400 is inserted into the connection hole of the right connecting vertical rod 214 of the second positioning portion 200 and is positioned by another pin, a threaded hole (not shown) coaxial with the right connecting vertical rod 400 is formed on the second end of the right connecting vertical rod 400, the second end of the right connecting vertical rod 400 is fastened to the right connecting vertical rod 214 by a bolt 800 and a threaded hole at the second end of the right connecting vertical rod 400 in a matching manner, specifically, the rod portion of the bolt 800 passes through the connection hole on the right connecting vertical rod 114 of the first positioning portion 100 and then is matched with the threaded hole at the second end of the right connecting vertical rod 400. By screwing in or out the bolt 600 and the bolt 800 at the same time, the second positioning portion 100 can be close to or away from the first positioning portion, and further the distance between the first positioning portion 100 and the second positioning portion 200 is changed, so that the measuring points of concrete beams or columns with different sizes can be positioned.

In order to further improve the universality of the measuring point positioning device of the embodiment to adapt to the measuring point positioning of concrete beams or columns with different sizes, in the embodiment, the left connecting vertical rod 113 of the first positioning portion 100 can slide along the length direction of the left connecting vertical rod 300 through the connecting hole 1131 thereof, and the right connecting vertical rod 114 of the first positioning portion 100 can slide along the length direction of the right connecting vertical rod 400 through the connecting hole thereof, so that the first positioning portion 100 can slide along the length direction of the left connecting vertical rod 300 and the right connecting vertical rod 400 as a whole, and the distance between the first positioning portion 100 and the second positioning portion 200 can be changed by sliding the first positioning portion 100, so as to adapt to the measuring point positioning of concrete beams or columns with different sizes.

As shown in fig. 1 and 3, each of the left positioning vertical bar 121 and the right positioning vertical bar 122 can slide along the length direction of the upper cross bar 111 and the lower cross bar 112, the top end of the left positioning vertical bar 121 and the upper cross bar 111 are provided with a positioning structure 700 which is matched with each other to position the left positioning vertical bar 121 when the position of the positioning net 120 is determined, and the top end of the right positioning vertical bar 122 and the upper cross bar 111 are provided with a positioning structure which is matched with each other to position the right positioning vertical bar 122 when the position of the positioning net 120 is determined. As shown in fig. 3, the positioning structure 700 may be a positioning hole 710 and a positioning pin 720, and the positioning pin 720 is inserted into the positioning hole 710 for positioning.

Furthermore, the top end and the bottom end of the left positioning vertical rod 121 are both formed with a first through hole 125, the top end of the left positioning vertical rod 121 is slidably sleeved on the upper cross rod 111 through the first through hole 125, and the bottom end of the left positioning vertical rod 121 is slidably sleeved on the lower cross rod 112 through the first through hole 125, so that the left positioning vertical rod 121 slides relative to the upper cross rod 111 and the lower cross rod 112. The top end of the vertical positioning rod 121 and the upper cross rod 111 are both provided with positioning holes 710, and when the positioning holes 710 of the two are aligned, the vertical positioning rod 121 can be positioned by inserting the positioning pin 720 into the positioning hole 710. The positioning holes 710 of the upper cross bar 111 are provided in plural, so that positioning can be realized when the positioning net 120 moves to different positions, and utilization is facilitated.

Similarly, the top end and the bottom end of the right positioning vertical rod 122 are both formed with a second through hole which is transversely arranged, the top end of the right positioning vertical rod 122 is slidably sleeved on the upper cross rod 111 through the second through hole, and the bottom end of the right positioning vertical rod 122 is slidably sleeved on the lower cross rod 112 through the second through hole.

The upper cross bars 111 are provided with positioning marks 1111 for positioning the positioning net 120, and as shown in fig. 3, the positioning marks 1111 of the two upper cross bars 111 are oppositely arranged. As shown in fig. 3, the positioning mark 1111 is a position mark of the plurality of positioning holes 710 on the upper cross bar 111, because the positioning holes 710 on the upper cross bar 111 correspond to the positioning holes on the left positioning vertical bar 121 and the right positioning vertical bar 122, the positioning mark 111 is finally used for positioning the position of the positioning net 120, and after the position of the positioning net 120 on the second positioning portion 200 is determined, the position of the positioning net 120 of the first positioning portion 100 can be quickly determined according to the corresponding positioning mark, so that the positioning efficiency of the measuring points on two opposite sides of the concrete beam or column member is improved.

Preferably, the upper cross bar 111 and the lower cross bar 112 are both retractable along the respective length directions; the left connecting vertical rod 113 and the right connecting vertical rod 114 can slide along the length direction of the upper cross rod 111 and the lower cross rod 112; the square net body 123 is a soft net body. Then go up horizontal pole 111 and bottom horizontal pole 112 all can stretch out and draw back, left side is connected montant 113 and right side and is connected montant 114 all can slide, and square dictyosome 123 matter is soft can receive and release, then first location portion 100 and second location portion 200 all can be folded, first location portion 100 also can be followed left side and is connected the vertical pole 300 and the right side and connect the vertical pole 400 and slide simultaneously, when it slides to laminating with second location portion 200, the folding of first location portion 100 relative second location portion 200 has also been realized, state after complete folding is shown in fig. 5, so that carry.

More specifically, as shown in fig. 3 and 4, a rail groove 1112 extending along the length direction is formed on the bottom surface of the upper cross bar 111, a rail groove 1121 extending along the length direction is formed on the top surface of the lower cross bar 112, the top end of the left connecting vertical bar 113 is embedded in the rail groove 1112 of the upper cross bar 111 and is in sliding fit with the rail groove 1112, and the bottom end of the left connecting vertical bar 113 is embedded in the rail groove 1121 of the lower cross bar 112 and is in sliding fit with the rail groove 1121; similarly, the top end of the right connecting rod 114 is inserted into the track groove 1112 of the upper cross rod 111 and is slidably engaged with the track groove 1112, and the bottom end of the right connecting rod 114 is inserted into the track groove 1121 of the lower cross rod 112 and is slidably engaged with the track groove 1121.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.