Measuring device for installing box-type arch ribs

Abstract

The present invention relates to a measuring device for installing a box-type arch rib in place, comprising a base, a universal spherical head, a protractor, a connecting rod and a prism structure. The base is provided with a box-section centroid positioning rod I and a box-section centroid positioning rod II; the prism structure comprises a bracket, a prism arranged on the bracket and a level bubble; one end of the connecting rod is connected to the chassis and the other end is connected to the bracket; the protractor comprises a protractor I and a protractor II, the protractor I passes through a limiting groove arranged on the connecting rod, and both ends are respectively hinged on the base, one end of the protractor II is fixed on the connecting rod, and the other end can be inserted into a limiting hole arranged on the base, and is in gap fit with the limiting hole, when the connecting rod is perpendicular to the top surface of the base, the planes where the protractor I and the protractor II are located are mutually perpendicular, the device has the advantages of simple installation and low cost, greatly reduces the workload and increases the accuracy of arch rib segment positioning.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, in particular to a measuring device for installing a box-type arch rib in place. Background Art

[0002] With the development of bridge technology, the advantages of steel basket arch bridge in material, spanning capacity and aesthetics are increasingly accepted by people. Since the arch ribs of steel basket arch bridge need to be tilted inward at a certain angle, it is difficult to install the arch ribs directly by controlling the arch axis. The traditional method of installing the arch ribs of steel basket arch bridge is generally to control the coordinate values ​​of the upper and lower four corner points of the rectangular end surface of each arch rib segment, such as Figure 1 As shown in the figure, the installation of each segment arch rib is controlled by comparing the actual measured values ​​of the coordinates of the four corner points with the theoretical values. However, the theoretical values ​​of the coordinates of the four corner points are converted based on the coordinates of the corresponding points on the arch axis on the construction drawings according to the geometric relationship. Since the geometric relationship between the coordinates of the points on the arch axis and the coordinates of the corner points is relatively complex, the conversion process is prone to errors. The conversion between various formulas is prone to cause the accumulation of errors. In addition, many points need to be measured and the workload is large. Therefore, providing a method that can directly measure the coordinates on the arch axis on the end faces of each segment of the box-type basket arch rib can determine the position of the arch rib segment, which will greatly reduce the workload and increase the accuracy of arch rib segment positioning. Summary of the invention

[0003] Based on this, it is necessary to provide a measuring device for installing the arch ribs of a box-type basket which is convenient to measure and accurately positioned.

[0004] The measuring device for installing the box-shaped arch rib in place includes a base, a universal spherical head, a protractor, a connecting rod and a prism structure;

[0005] The base is provided with a telescopic box-section centroid positioning rod I and a telescopic box-section centroid positioning rod II;

[0006] The universal spherical head comprises a base fixed on the base, and a universal spherical structure; the universal spherical structure comprises a universal ball head, and a chassis connected to the universal ball head; one end of the base is provided with a spherical groove matched with the universal ball head;

[0007] The prism structure includes a bracket, a prism arranged on the bracket and a level bubble;

[0008] One end of the connecting rod is connected to the chassis, and the other end is connected to the bracket;

[0009] The protractor includes a protractor I and a protractor II, wherein the protractor I is a 0°-180° protractor, and the protractor II is a 0°-90° protractor. The protractor I passes through a limiting groove provided on the connecting rod, and both ends are respectively hinged on the base. One end of the protractor II is fixed on the connecting rod, and the other end can be inserted into a limiting hole provided on the base, and is gap-matched with the limiting hole. When the connecting rod is perpendicular to the top surface of the base, the planes where the protractor I and the protractor II are located are perpendicular to each other.

[0010] Furthermore, the base is a circular thin sheet base, a top surface of which is provided with a base groove, and both ends of the protractor I are respectively hinged in the base groove.

[0011] Furthermore, the box-section centroid positioning rod I comprises a rotating base rotatably mounted on the bottom surface of the base, a rectangular straight hard rod fixed on the rotating base, and a fixing device fixed on the end of the rectangular straight hard rod.

[0012] Furthermore, the box-section centroid positioning rod I comprises two retractable rectangular straight rigid rods arranged at 180 degrees, the ends of the two rectangular straight rigid rods are rotatably fixed with the fixing device composed of a steel sheet and two angle steels welded together by hinged bolts and nuts, and the retractable rectangular straight rigid rod is provided with scale lines and a length adjustment knob I.

[0013] Furthermore, the box-section centroid positioning rod II includes a rectangular straight hard rod fixed on the top surface of the base and on a straight line with the centroid of the top surface of the base, a rectangular thin sheet is fixed to the end of the rectangular straight hard rod, and the rectangular straight hard rod is a retractable rectangular straight hard rod provided with scale lines and a length adjustment knob II.

[0014] Furthermore, the intersection line of the plane where the protractor I is located and the top surface of the base is always on the same straight line as the centroid positioning rod II of the box-section.

[0015] Furthermore, the base includes a seat body having the spherical groove and a rotating member rotatably mounted on one end of the seat body away from the spherical groove; the rotating member is detachably connected to the base.

[0016] Furthermore, the universal ball head also includes a ball head locking knob installed on the base, and the ball head locking knob can be operably moved in a direction pointing toward or away from the universal ball head to lock or release the universal ball head; the universal ball head also includes a base locking knob installed on the seat body, and the base locking knob can be operably moved in a direction toward or away from the central axis of the seat body to lock or release the rotating member.

[0017] Furthermore, the protractor I and the protractor II are arc-shaped strip protractors surrounded by two circular arcs, and the length of the limiting groove is greater than the width of the protractor I.

[0018] Furthermore, the connecting rod may include only one straight rod, or may be a spliced ​​straight rod structure formed by sequentially connecting a plurality of straight rods.

[0019] The above-mentioned box-type basket arch rib installation measuring device has been successfully tested on a small scale during the arch rib assembly construction of Chetianjiang Bridge in the second contract section of Longlang Expressway. The structure has the advantages of easy installation and low cost, greatly reducing the workload and increasing the accuracy of arch rib segment positioning, which has played a good reference role for similar construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the positioning control points for the installation of traditional arch rib segments;

[0021] Figure 2 It is a structural diagram of the installation measurement device for the box-type arch rib;

[0022] Figure 3 It is a structural schematic diagram of the universal spherical head in the box-type arch rib installation measurement device;

[0023] Figure 4 It is a structural schematic diagram of another angle of view of the universal spherical platform in the box-type arch rib installation measurement device;

[0024] Figure 5 It is a structural schematic diagram of the prism structure in the box-type arch rib installation position measurement device;

[0025] Figure 6 for Figure 5 A P-direction view of the prism structure shown;

[0026] Figure 7 This is a schematic diagram of the structure of the standard connecting rod in the installation measurement device for the box-type arch rib;

[0027] Figure 8 It is a structural schematic diagram of the centroid positioning rod I of the box section;

[0028] Fig. 9 It is a structural schematic diagram of the centroid positioning rod II of the box section;

[0029] Fig.10 This is a schematic diagram of the protractor structure.

[0030] Explanation of reference numerals: 100, measuring device for installing the arch rib of a box-type basket; 110, centroid positioning rod Ⅰ for box-type section; 1111, fine nail; 1112, length adjustment knob Ⅰ; 1113, angle steel Ⅰ; 1114, angle steel Ⅱ; 1115, steel sheet; 1116, hinged bolt; 120, universal ball head; 121, base; 1211, spherical groove; 1212, second connecting hole; 1213, seat body; 1214, rotating part; 122, universal ball structure; 1221, chassis; 1222, universal ball head; 1223, fixing screw; 123, ball head locking knob; 124, base locking knob; 130, Prism structure; 131, bracket; 1311, fifth threaded hole; 132, prism; 133, level bubble; 140, connecting rod; 141, external thread; 142, fourth threaded hole; 143, standard connecting rod; 150, box-section centroid positioning rod II; 1511, fine nail; 1512, length adjustment knob II; 1513, rectangular sheet; 1514, fine nail; 160, protractor; 1611, connecting rod center scale line I; 1612, connecting rod center scale line II; 1613, protractor I; 1614, protractor II; 1615, rotating shaft; 1616, notch; 170, base; 171, base groove. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intermediate element. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or there can be one or more intermediate elements.

[0034] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0035] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0036] See also Figure 2 In a preferred embodiment of the present invention, the box-type basket arch rib installation and measurement device is used to assist in completing the installation of each segment of the arch rib. The arch axis measurement device includes a base 170, a universal spherical head 120, a prism structure 130, a connecting rod 140, and a protractor. The base 170 is provided with a box-type section centroid positioning rod I 110 and a box-type section centroid positioning rod II 150;

[0037] The base 170 is a circular thin sheet base 170, the top surface of the base 170 is flush with the end surface of the arch rib segment, and the centroid of the top surface of the base 170 is coincident with the centroid of the end surface of the arch rib segment through the box-section centroid positioning rod Ⅰ110 and the box-section centroid positioning rod Ⅱ150. A base groove is provided on the top surface, and the two ends of the protractor Ⅰ1613 are respectively hinged in the base groove.

[0038] Please also read Figure 3 and Figure 4The universal spherical head 120 includes a base 121 fixed on the base 170, and a universal spherical structure 122. The universal spherical structure 122 includes a universal ball head 1222, and a chassis 1221 connected to the universal ball head 1222. One end of the base 121 has a spherical groove 1211 that matches the universal ball head 1222. The universal ball head 1222 is rotatably connected to the spherical groove 1211. One end of the base 121 that is away from the spherical groove 1211 is detachably fixed to the installation position. When measuring during the process of installing the arch rib in place, the base 121 is located below the universal spherical structure 122. Further, the base 121 includes a base body 1213 having the spherical groove 1211 and a rotating member 1214 rotatably installed on one end of the base body 1213 away from the spherical groove 1211; the rotating member 1214 is detachably connected to the base 170, and the universal spherical head 120 also includes a ball head locking knob installed on the base 121, and the ball head locking knob can be operably moved in a direction pointing to or away from the universal ball head 1222 to lock or release the universal ball head 1222; the universal spherical head 120 also includes a base locking knob installed on the base body 1213, and the base locking knob can be operably moved in a direction toward or away from the central axis of the base body 1213 to lock or release the rotating member 1214.

[0039] Please also read Figure 5 and Figure 6 The prism structure 130 includes a bracket 131 , a prism disposed on the bracket 131 , and a level bubble 133 disposed at one end of the bracket 131 .

[0040] One end of the connecting rod 140 is detachably connected to the side of the chassis 1221 away from the universal ball head 1222, and the other end is detachably connected to the end of the bracket 131 provided with the level bubble 133. Thus, the connecting rod 140 is used to connect the prism structure 130 and the universal spherical structure 122. When measuring during the process of installing the arch rib in place, the prism structure 130 is located above the connecting rod 140, and the level bubble 133 is located at the upper end of the bracket 131.

[0041] It should be noted that the connecting rod 140 may include only one straight rod, or may be a splicing structure formed by connecting a plurality of straight rods in sequence.

[0042] See also Figure 8 , Fig. 9The box-section centroid positioning rod Ⅰ110 includes a rotating base rotatably mounted on the bottom surface of the base 170, a rectangular straight hard rod fixed on the rotating base, and a fixing device fixed to the end of the rectangular straight hard rod. Further, the box-section centroid positioning rod Ⅰ110 includes two retractable rectangular straight hard rods arranged at 180 degrees, and the ends of the two rectangular straight hard rods are rotatably fixed with the fixing device composed of a steel sheet and two angle steels, namely angle steel Ⅰ and angle steel Ⅱ, by hinge bolts and nuts. The retractable rectangular straight hard rod is provided with scale lines and a length adjustment knob Ⅰ1112. The steel plate of the end fixing device of the box-section centroid locating rod Ⅰ110 is connected to the rectangular straight hard rod by hinged bolts and nuts, and the bottom surfaces of the horizontal sides of the angle steel Ⅰ and the angle steel Ⅱ of the fixing device are on the same horizontal plane with the top surface of the base 170 to ensure that the top surface of the base 170 and the end surface of the arch rib segment positioned by the box-section centroid locating rod Ⅰ110 are on the same plane, and the side surfaces of the box-section centroid locating rod Ⅰ110 and the box-section centroid locating rod Ⅱ150 are both provided with length adjustment knobs to ensure that the measuring device can accurately find the centroid position of the end surface of the arch rib segment.

[0043] The box-section centroid positioning rod II 150 includes a rectangular straight hard rod fixed on the top surface of the base 170 and in a straight line with the centroid of the top surface of the base 170, a rectangular thin sheet is fixed to the end of the rectangular straight hard rod, and the rectangular straight hard rod is a retractable rectangular straight hard rod provided with scale lines and a length adjustment knob II.

[0044] See also Fig.10The protractor includes a protractor I 1613 and a protractor II 1614, wherein the protractor I 1613 is a 0°-180° protractor, and the protractor II 1614 is a 0°-90° protractor. Scale lines are arranged on the outer surface of the protractor, and the protractor I 1613 passes through the limiting groove arranged on the connecting rod 140, and the two ends are respectively hinged on the base 170, one end of the protractor II 1614 is fixed on the connecting rod 140, and the other end can be inserted into the limiting hole arranged on the base 170, and the gap is matched with the limiting hole. As an optional similar solution, the protractor, protractor I 1613 passes through the notch set on protractor II 1614, and the protractor II 1614 is fixed to the connecting rod 140. The connecting rod 140 can swing along the protractor I 1613 through the rotating shaft device, that is, the universal spherical head 120, and the universal spherical head 120 and the protractor II 1614 can enter and exit the limit hole to realize the swing along the protractor II 1614. When the connecting rod 140 is perpendicular to the top surface of the base 170, the plane where the protractor I 1613 and the protractor II 1614 are located is perpendicular to each other. The protractor I 1613 and the protractor II 1614 are arc-shaped strip protractors surrounded by two arcs, and the width is the same everywhere in the radial direction. Since the center of rotation of the connecting rod is the center of the universal spherical structure, and the axis of rotation of the protractor Ⅰ1613 is the line connecting the two hinge points, the two are not necessarily at the same height. In order to achieve smooth rotation, the length of the limit groove is greater than the width of the protractor Ⅰ1613, so that it has a certain clearance margin.

[0045] Furthermore, the limit groove is a sunken groove dug out on the connecting rod 140, and the middle part of the protractor Ⅰ1613 is correspondingly placed in the sunken groove without affecting the reading of the scale on the protractor Ⅰ1613. The connecting rod 140 is correspondingly provided with a connecting rod center scale line Ⅰ1611 and a connecting rod center scale line Ⅱ1612, which is convenient for precise reading of angle values ​​and is more user-friendly.

[0046] Please refer again Figure 1 The intersection line between the plane where the protractor Ⅰ1613 in the protractor device is located and the top surface of the base 170 is always in a straight line with the box-section centroid positioning rod Ⅱ150.

[0047] For ease of understanding, a brief description is given of the process of installing each segment of the box-type arch rib using the above-mentioned arch rib installation position measurement device as an aid:

[0048] (1) First, adjust the box-section centroid positioning rod I110 so that the top surface of the base 170 is flush with the front end surface of the arch rib segment and the centroids of the two coincide, tighten the length adjustment knob of the box-section centroid positioning rod I110, rotate the base 170 and adjust the length of the box-section centroid positioning rod II150 at the same time, so that the outer side of the bottom surface of the rectangular thin sheet at the end position of the box-section centroid positioning rod II150 is flush with and close to the bottom edge of the front end of the arch rib segment, and then tighten the length adjustment knob of the box-section centroid positioning rod II150;

[0049] (2) Loosen the ball head locking knob and the base locking knob, and by observing the position of the level bubble 133, swing the connecting rod 140 along the protractor to ensure that the connecting rod 140 can reach a vertical state, and finally tighten the ball head locking knob and the base locking knob; then extend the connecting rod 140 to the outside of the arch rib box girder to ensure that the prism structure 130 can be located outside the arch rib box girder.

[0050] (3) The readings of protractor I 1613 and protractor II 1614 are recorded by the scale lines on the connecting rod 140; the position of the prism is measured by a total station to obtain the coordinates of the point on the arch axis on the end face of the arch rib segment, that is, the coordinates of the centroid of the box girder end face. The end face of the segment arch rib can be positioned by the obtained coordinate points and angles.

[0051] The use of the arch rib installation position measuring device reduces the workload of the measurement personnel and can effectively improve the accuracy of the arch rib segment installation position.

[0052] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 In some embodiments, one end of the connecting rod 140 has an external thread, and the end surface of the other end is provided with a third threaded hole. Thus, the end of the connecting rod 140 having the external thread forms a threaded rod. The end of the bracket 131 having the level bubble 133 is provided with a fourth threaded hole.

[0053] A fixing screw is fixed to one end of the chassis 1221 away from the universal ball head 1222. The fixing screw is passed through and screwed into the third threaded hole. One end of the connecting rod 140 with an external thread is passed through and screwed into the fourth threaded hole. Therefore, during the installation process of the above-mentioned arch rib installation measurement device, the connection between the connecting rod 140 and the chassis 1221 can be achieved by simply twisting the connecting rod 140, and the connection between the connecting rod 140 and the prism structure 130 can be achieved by simply twisting the prism structure 130.

[0054] Furthermore, in some embodiments, the connecting rod 140 includes a plurality of standard connecting rods. The plurality of standard connecting rods are detachably connected in sequence along the direction from the universal spherical structure 122 to the prism structure 130 to form the connecting rod 140. The standard connecting rod refers to a rod having a preset length and can be used as a standard part. Therefore, the length of the connecting rod 140 can be adjusted by only changing the number of standard connecting rods to meet the measurement requirements on arch rib box girders of different structures and sizes, thereby making the use of the above-mentioned measuring device more convenient and taking into account higher adaptability.

[0055] Specifically, one end of each standard connecting rod has an external thread, and the end surface of the other end is provided with a fourth threaded hole. The end of the standard connecting rod with an external thread is inserted into and screwed into the fourth threaded hole of the adjacent standard connecting rod, so that two adjacent standard connecting rods are detachably connected.

[0056] Please refer again Figure 3 and Figure 4 In some embodiments, the universal ball head 120 further includes a ball head locking knob mounted on the base 121. The ball head locking knob can be operated to move in a direction pointing to or away from the universal ball head 1222 to lock or loosen the universal ball head 1222. In actual operation, when the universal ball head 1222 moves to the point where the connecting rod 140 remains in a vertical state, the ball head locking knob is rotated to move the ball head locking knob in a direction pointing to the universal ball head 1222 until one end of the ball head locking knob abuts against the universal ball head 1222, so as to lock the universal ball head 1222, thereby ensuring the probability of the prism structure 130 shaking during the total station measurement process, and further improving the measurement accuracy.

[0057] In some embodiments, the base 121 includes a base body 1213 having a spherical groove 1211 and a rotating member 1214 rotatably mounted on one end of the base body 1213 away from the spherical groove 1211 , and the side of the rotating member 1214 away from the spherical groove 1211 is detachably connected to the mounting position.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A measuring device for installing a box-type arch rib in place, characterized in that: It includes a base, a universal spherical head, a protractor, a connecting rod and a prism structure; The base is provided with a telescopic box-section centroid positioning rod I and a telescopic box-section centroid positioning rod II; The universal spherical head comprises a base fixed on the base, and a universal spherical structure; the universal spherical structure comprises a universal ball head, and a chassis connected to the universal ball head; one end of the base is provided with a spherical groove matched with the universal ball head; The prism structure includes a bracket, a prism arranged on the bracket and a level bubble; One end of the connecting rod is connected to the chassis, and the other end is connected to the bracket; The protractor includes a protractor I and a protractor II, wherein the protractor I is a 0°-180° protractor, and the protractor II is a 0°-90° protractor. The protractor I passes through a limiting groove provided on the connecting rod, and both ends are respectively hinged on the base. One end of the protractor II is fixed on the connecting rod, and the other end can be inserted into a limiting hole provided on the base to form a clearance fit with the limiting hole. When the connecting rod is perpendicular to the top surface of the base, the planes where the protractor I and the protractor II are located are perpendicular to each other.

2. The measuring device for installing the box-type arch rib in place according to claim 1 is characterized in that: The base is a circular base, and a base groove is arranged on the top surface. Both ends of the protractor I are respectively hinged in the base groove.

3. The measuring device for installing the box-type arch rib in place according to claim 1 is characterized in that: The box-section centroid positioning rod I comprises a rotating base rotatably mounted on the bottom surface of the base, a rectangular straight hard rod fixed on the rotating base, and a fixing device fixed on the end of the rectangular straight hard rod.

4. The measuring device for installing the box-type arch rib in place according to claim 3 is characterized in that: The box-section centroid positioning rod I comprises two retractable rectangular straight hard rods arranged at 180 degrees, the ends of the two rectangular straight hard rods are rotatably fixed with the fixing device composed of a steel sheet and two angle steels welded together by hinged bolts and nuts, and the retractable rectangular straight hard rod is provided with scale lines and a length adjustment knob I.

5. The measuring device for installing the box-type arch rib in place according to claim 1 is characterized in that: The box-section centroid positioning rod II includes a rectangular straight hard rod fixed on the top surface of the base and in a straight line with the centroid of the top surface of the base, a rectangular thin sheet is fixed to the end of the rectangular straight hard rod, and the rectangular straight hard rod is a retractable rectangular straight hard rod provided with scale lines and a length adjustment knob II.

6. The measuring device for installing the box-type arch rib in place according to claim 5, characterized in that: The intersection line between the plane where the protractor I is located and the top surface of the base is always on the same straight line as the centroid positioning rod II of the box-section.

7. The measuring device for installing the box-type arch rib in place according to claim 1, characterized in that: The base comprises a seat body having the spherical groove and a rotating member rotatably mounted on one end of the seat body away from the spherical groove; the rotating member is detachably connected to the base.

8. The measuring device for installing the box-type arch rib in place according to claim 7, characterized in that: The universal ball head also includes a ball head locking knob installed on the base, and the ball head locking knob can be operably moved in a direction toward or away from the universal ball head to lock or release the universal ball head; the universal ball head also includes a base locking knob installed on the seat body, and the base locking knob can be operably moved in a direction toward or away from the central axis of the seat body to lock or release the rotating member.

9. The measuring device for installing the box-type arch rib in place according to claim 1, characterized in that: The protractor I and the protractor II are arc-shaped strip protractors surrounded by two circular arcs, and the length of the limiting groove is greater than the width of the protractor I.

10. The measuring device for installing the box-type arch rib in place according to claim 1, characterized in that: The connecting rod comprises only one straight rod, or a spliced ​​straight rod structure formed by connecting a plurality of straight rods in sequence.

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