Device for accurately fixing embedded steel bars of three-limb steel frame

Abstract

The utility model discloses a device for accurately fixing embedded steel bars of a three-limb steel frame, and relates to the technical field of building construction. The device comprises a base, a steel bar positioning structure is arranged on the base, the steel bar positioning structure comprises three sets of annular pipe bodies and connecting assemblies capable of being adjusted in a telescopic mode, each connecting assembly comprises a sleeve and a telescopic rod, station fixing bolts are arranged on the side wall of each sleeve, and the annular pipe bodies are connected in pairs through the connecting assemblies. The end of the telescopic rod is hinged to the annular pipe body, and the end of the sleeve is fixedly connected with the annular pipe body. The annular pipe bodies are arranged in a triangular mode, the three annular pipe bodies are sequentially connected together in an end-to-end mode through the connecting assemblies, the distance and the angle of the annular pipe bodies can be accurately adjusted by adjusting the extension or contraction length of the telescopic rods on the sleeves, then the device is fixed to I-shaped steel, and the length of embedded steel bars is controlled. The problems that positioning and reinforcing of the three-limb steel frame are not standard and the like are well solved, and the tunnel second lining construction quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and more specifically, to a device for accurately fixing pre-embedded steel bars on a three-limb steel frame. Background Art

[0002] The existing three-legged steel frame has non-standard embedded steel bars. When constructing the secondary lining three-legged steel frame, the position and angle deviations of the pre-embedded three-legged steel bars are large, and it is impossible to ensure that the three-legged steel frame is firmly and accurately connected to the pre-embedded three-legged steel bars, resulting in uneven force on the three-legged steel frame, which seriously affects the quality of the secondary lining construction. To solve this problem, a precise fixing device for the pre-embedded steel bars of the three-legged steel frame has been developed, which can well solve the problems of non-standard positioning and reinforcement of the tunnel three-legged steel frame, and improve the quality of the tunnel secondary lining construction. Utility Model Content

[0003] The utility model overcomes the shortcomings of the existing three-legged steel frame embedded steel bar fixation and non-standard pre-embedding, and provides a device for accurately fixing the three-legged steel frame embedded steel bar. It can well solve the problems of non-standard positioning and reinforcement of the tunnel three-legged steel frame, and improve the construction quality of the tunnel secondary lining.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a device for accurately fixing pre-embedded steel bars on a three-legged steel frame, comprising a base, a steel bar positioning structure being provided on the base, the steel bar positioning structure comprising three groups of annular tube bodies and a telescopically adjustable connecting assembly, the connecting assembly comprising a sleeve and a telescopic rod, a fixed position bolt being provided on the side wall of the sleeve, the annular tube bodies being connected in pairs through the connecting assembly, the end of the telescopic rod being hingedly connected to the annular tube body, and the end of the sleeve being fixedly connected to the annular tube body.

[0005] The working principle of the three-legged steel frame pre-embedded steel bar device in this application is as follows: according to the spacing and pre-embedded length of the three-legged steel frame designed in the drawings, the annular tube bodies are arranged in a triangular layout, and the three annular tube bodies are connected together end to end using a connecting assembly, wherein the sleeve is fixed to the side wall of the annular tube body, and the telescopic rod is hinged to another adjacent annular tube body. By adjusting the extension length of the telescopic rod, the spacing and angle of the annular tube bodies can be accurately adjusted. Then the device is fixed to the base to control the length of the pre-embedded steel bars.

[0006] During construction, the pre-cut steel bars are inserted into the annular tube body, and the three steel bars are tightened and welded firmly with wire rods. Finally, when constructing the low side wall of the inverted arch, the pre-processed three-leg steel frame cage is placed in the low side wall of the inverted arch and reinforced. When constructing the second lining three-leg steel frame, the pre-processed second lining three-leg steel frame and the embedded three-leg steel frame cage are welded firmly according to the design requirements of the installation drawings to ensure the quality of the second lining construction.

[0007] Preferably, the base includes an I-beam and two sets of connecting plates disposed on the I-beam, with the side walls of the annular tube body fixedly connected to the connecting plates. The connecting plates can be used to weld the I-beam and the steel bar positioning structure together, and the I-beam can improve the stability of the steel bar positioning structure after embedding.

[0008] As a preference, there are two sets of steel bar positioning structures, one set on the side walls near the two ends of the I-beam, to increase the embedded depth of the three steel bars and the accuracy after embedding.

[0009] Preferably, T-shaped connectors are provided at both ends of the bottom of the I-beam away from the side of the steel bar positioning structure to improve the stability of the steel bar positioning structure after embedding.

[0010] Preferably, a positioning tube is embedded in the open end of one side of the annular tube, and the positioning tube has a trumpet cavity that gradually decreases from top to bottom. The trumpet cavity design of the positioning tube can keep the steel bars in the center position when inserted into the annular tube, thereby improving the accuracy of the spacing of the steel bars inserted into the three-legged steel frame.

[0011] Preferably, a positioning mechanism is embedded in the other open end of the annular tube body. The positioning mechanism includes an annular mounting seat, a plurality of fixing plates vertically provided on the inner wall of the annular mounting seat, a hinged positioning plate provided on the fixing plate, and a telescopic spring provided between the fixing rod and the positioning plate. This can abut and fix the steel bar inserted into the annular tube body.

[0012] Preferably, a circular array of positioning plates is arranged on the inner wall of the annular mounting seat, and the angle between the positioning plate and the fixing plate on the side where the telescopic spring is arranged is acute. The mounting plates arranged at equal intervals can ensure uniform force on all sides of the inserted steel bar.

[0013] Preferably, a ruler is provided on the telescopic rod to facilitate accurate adjustment of the telescopic length of the telescopic rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the annular tube bodies are arranged in a triangular arrangement, and the three annular tube bodies are connected end to end in sequence using a connecting assembly. By adjusting the extension or contraction length of the telescopic rod on the sleeve, the spacing and angle of the annular tube bodies can be accurately adjusted. The device is then fixed on the I-beam to control the length of the embedded steel bars, which effectively solves the problems of non-standard positioning and reinforcement of the three-limb steel frame, thereby improving the construction quality of the tunnel secondary lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of a device for accurately fixing three-limb steel frame embedded steel bars of the utility model.

[0016] Figure 2 It is a side view of a device for accurately fixing three-limb steel frame embedded steel bars of the utility model.

[0017] Figure 3It is a cross-sectional view of the connection assembly of the present utility model.

[0018] Figure 4 It is a cross-sectional view of the annular tube body of the present utility model.

[0019] Figure 5 yes Figure 4 Cross-sectional view at “AA” in the figure.

[0020] In the figure: base 100; I-beam 101; connecting plate 102; connecting piece 103;

[0021] Annular tube 200; connecting ear 201; rotating shaft 202;

[0022] Connecting assembly 300; sleeve 301; telescopic rod 302; telescopic rod cavity 303; threaded cavity 304; positioning bolt 305; scale 306;

[0023] Positioning tube 400; horn cavity 401; abutment portion 402; embedded portion 403; horn portion 404; arc chamfer 405; large horn mouth 406; small horn mouth 407;

[0024] Annular mounting seat 501 ; fixing plate 502 ; fixing rod 503 ; positioning plate 504 . DETAILED DESCRIPTION

[0025] The following is a further detailed description of the technical solution of the utility model through specific embodiments and in conjunction with the accompanying drawings:

[0026] Example 1: See attached Figure 1 To the attached Figure 3, a device for accurately fixing pre-buried steel bars of a three-limb steel frame; it includes a base 100, on which a steel bar positioning structure is provided, and the steel bar positioning structure includes three groups of annular tubes 200 and a telescopically adjustable connecting assembly 300, the connecting assembly 300 includes a sleeve 301 and a telescopic rod 302, a telescopic rod cavity 303 is provided in the end wall of the sleeve 301, the telescopic rod slide 302 is movably arranged in the telescopic rod cavity 303, a threaded cavity 304 is provided on the side wall of the sleeve 301 that is connected to the telescopic rod cavity 303, a fixed position bolt 305 is connected to the threaded cavity 303 on the sleeve 301, and the positioning bolt 305 can be manually rotated clockwise (or counterclockwise) to adjust the The telescopic rod 302 in the telescopic rod cavity 303 is pressed and fixed (or the pressing and fixing of the telescopic rod 302 in the telescopic rod cavity 303 is loosened so that the telescopic rod 302 can be telescoped and adjusted in the telescopic cavity 303); the annular tube bodies 200 are connected to each other in pairs through the connecting assembly 300, wherein a connecting ear 201 is provided on the side wall of the annular tube body 200, and a rotating shaft 202 is provided between the end of the telescopic rod 302 away from the side of the sleeve 301 and the connecting ear 201 on the side wall of the annular tube body 200, so that the two are hingedly connected, and the sleeve 301 away from the side of the telescopic rod 302 is fixedly connected to the side wall of the annular tube body 200. The present application arranges the annular tube bodies 200 in a triangular configuration and utilizes the connecting assembly 300 to sequentially connect the three annular tube bodies 200 end-to-end. The sleeve 301 is fixed to the sidewall of the annular tube body 200, and the telescopic rod 302 is hinged to the other adjacent pair of annular tube bodies 200. By adjusting the extension or retraction length of the telescopic rod 302, the length of the connecting assembly 300 can be adjusted, thereby adjusting the spacing between the two groups of annular tube bodies 200 connected by the length-adjustable connecting assembly 300. By adjusting the length of each connecting assembly 300 according to different needs, the spacing between the annular tube bodies 200 and the angle between them can be precisely adjusted. A scale 306 is provided on the telescopic rod 302 to facilitate precise adjustment of the telescopic length of the telescopic rod.

[0027] The working principle of the three-legged steel frame embedded steel bar device in this application is as follows:

[0028] According to the spacing and embedded length of the three-limb steel frame designed in the drawing, the annular tube bodies 200 are arranged in a triangular layout, and the three annular tube bodies are connected end to end in sequence using the connecting assembly 200. The sleeve 301 is fixed to the side wall of the annular tube body 200, and the telescopic rod 302 is hinged to the side wall of another adjacent annular tube body 200. By adjusting the extension or retraction length of the telescopic rod 301, the spacing and angle of the annular tube bodies 200 can be accurately adjusted. Then, the device is fixed to the base to control the length of the embedded steel bars.

[0029] During construction, the pre-cut steel bars are inserted into the annular tube body 200, and the three steel bars are tightened and welded firmly using wire rods. Finally, when constructing the low side wall of the inverted arch, the pre-processed three-leg steel frame cage is placed in the low side wall of the inverted arch and reinforced. When constructing the second lining three-leg steel frame, the pre-processed second lining three-leg steel frame and the pre-buried three-leg steel frame cage are welded firmly according to the design requirements of the installation drawings to ensure the quality of the second lining construction.

[0030] Example 2:

[0031] See attached Figure 1 To the attached Figure 3 This embodiment further defines the base 100 based on Example 1. The base 100 is composed of an I-beam 101 and a group of connecting plates 102 arranged on the I-beam 101. The side walls of the annular tube body 200 are fixedly connected to the connecting plates 102. The I-beam 101 and the steel bar positioning structure can be welded and fixed through the connecting plates 102. The I-beam can improve the stability of the steel bar positioning structure after embedding. It is further defined that the connecting plate 102 is made of steel plate, the annular tube body 200 is made of steel pipe, and the sleeve 301 and the telescopic rod 302 in the connecting assembly 300 are both made of steel. The I-beam 101 and the connecting plate 102 are connected together by welding, and the upper surface wall away from the I-beam 101 is welded to the steel bar positioning structure that has completed the spacing and angle adjustment. More specifically, the connecting plate 102 is welded to the two groups of the annular tube bodies 200. The three-legged steel frame embedded steel bar device composed of the I-beam 101, the connecting plate 102, and the annular tube body 200 can well achieve accurate and stable positioning of the three-legged steel frame.

[0032] The working principle of the three-legged steel frame embedded steel bar device in this application is as follows:

[0033] According to the spacing and embedded length of the three-limb steel frame designed in the drawing, the annular tube bodies 200 are arranged in a triangular layout, and the three annular tube bodies are connected end to end in sequence using the connecting assembly 200. The sleeve 301 is fixed to the side wall of the annular tube body 200, and the telescopic rod 302 is hinged to the side wall of another adjacent annular tube body 200. By adjusting the extension or retraction length of the telescopic rod 301, the spacing and angle of the annular tube bodies 200 can be accurately adjusted. Then, the device is fixed to the base to control the length of the embedded steel bars.

[0034] During construction, the pre-cut steel bars are inserted into the annular tube body 200, and the three steel bars are tightened and welded firmly using wire rods. Finally, when constructing the low side wall of the inverted arch, the pre-processed three-leg steel frame cage is placed in the low side wall of the inverted arch and reinforced. When constructing the second lining three-leg steel frame, the pre-processed second lining three-leg steel frame and the pre-buried three-leg steel frame cage are welded firmly according to the design requirements of the installation drawings to ensure the quality of the second lining construction.

[0035] Example 3:

[0036] See attached Figure 1 To the attached Figure 3 This embodiment further defines the base 100 based on the first embodiment. The base 100 is composed of an I-beam 101 and two groups of connecting plates 102 provided on the I-beam 101. The side walls of the annular tube body 200 are fixedly connected to the connecting plates 102. The I-beam 101 and the steel bar positioning structure can be welded and fixed via the connecting plates 102. The I-beam can improve the stability of the steel bar positioning structure after embedding. It is further defined that the connecting plate 102 is made of steel plate, the annular tube body 200 is made of steel pipe, and the sleeve 301 and the telescopic rod 302 in the connecting assembly 300 are both made of steel. The I-beam 101 and the connecting plate 102 are connected together by welding, and the upper surface wall away from the I-beam 101 is welded to the steel bar positioning structure that has been adjusted in spacing and angle. More specifically, the connecting plate 102 is welded to the two groups of the annular tube bodies 200. The two groups of connecting plates 102 need to be fixedly installed with two groups of steel bar positioning structures corresponding thereto. After installation, the two groups of positioning structures are arranged in front and back positions, and the steel bars on the corresponding annular tube bodies 200 are aligned with each other. This design can make the steel bars inserted into the two groups of aligned through-holes of the annular tube bodies 200 be in a vertical straight line, that is, the three steel bars can be in a vertical parallel position, which is convenient for the manufacture of the steel cage. The three-legged steel frame embedded steel bar device composed of the I-beam 101, connecting plate 102, and annular tube body 200 can well achieve accurate and stable positioning of the three-legged steel frame.

[0037] The working principle of the three-legged steel frame embedded steel bar device in this application is as follows:

[0038] According to the spacing and embedded length of the three-limb steel frame designed in the drawing, the annular tube bodies 200 are arranged in a triangular layout, and the three annular tube bodies are connected end to end in sequence using the connecting assembly 200. The sleeve 301 is fixed to the side wall of the annular tube body 200, and the telescopic rod 302 is hinged to the side wall of another adjacent annular tube body 200. By adjusting the extension or retraction length of the telescopic rod 301, the spacing and angle of the annular tube bodies 200 can be accurately adjusted. Then, the device is fixed to the base to control the length of the embedded steel bars.

[0039] During construction, the pre-cut steel bars are inserted into the annular tube body 200 with the two pre-buried groups of through holes aligned, so that the inserted steel bars are in a vertical straight line. Similarly, the three inserted steel bars are all in a vertical parallel position. The three steel bars are tightened and welded firmly with wire rods. Finally, when constructing the low side wall of the inverted arch, the pre-processed three-legged steel frame cage is placed in the low side wall of the inverted arch and reinforced. When constructing the second lining three-legged steel frame, the pre-processed second lining three-legged steel frame and the pre-buried three-legged steel frame cage are welded firmly according to the design requirements of the installation drawing to ensure the quality of the second lining construction.

[0040] Example 4:

[0041] This embodiment further limits implementation 2 or implementation 3.

[0042] See attached Figure 1 T-shaped connectors 103 are provided on both sides of the bottom end surface of the I-beam 101 away from the side of the steel bar positioning structure to improve the stability of the steel bar positioning structure after embedding.

[0043] Example 5:

[0044] See attached Figure 1 To the attached Figure 5This embodiment is a further limitation made on the basis of embodiment 2 or embodiment 3. A positioning cylinder 400 is embedded in the open end of one side of the annular tube body 200. The positioning cylinder 400 is provided with a horn cavity 401 which gradually shrinks from top to bottom. The positioning cylinder 400 comprises an abutting portion 402, an embedding portion 403 and a horn portion 404. The outer diameter of the abutting portion 402 is the same as the outer diameter of the annular tube body 200. The abutting portion 402 is connected to the embedding portion 403. A circular chamfer 405 is provided between the abutting portion 402 and the embedding portion 403. The abutting portion 402 and the embedding portion 403 are away from the circular chamfer 405. The 03 connecting side is a right angle, and the outer diameter of the embedded portion 403 is slightly larger than the inner diameter of the through hole in the annular tube 200, so that the positioning tube 400 and the annular tube 200 are fixedly installed by interference fit. The embedded portion 403 is connected to the trumpet portion 404, and the trumpet cavity 401 is arranged in the trumpet portion 404. The upper side of the trumpet portion 404 is provided with a large trumpet mouth 406, and the lower side of the trumpet portion 404 is provided with a small trumpet mouth 407, that is, the trumpet cavity 401 gradually shrinks from the large trumpet mouth 406 to the small trumpet mouth 407 to form a tapered cavity. The design of the trumpet cavity 401 on the positioning tube 400 is conducive to the insertion of steel bars into the through hole of the annular tube body 200, and after insertion, the steel bars can be gradually adjusted to the center during the downward insertion process, thereby improving the accuracy of the spacing of the steel bars inserted into the three-legged steel frame.

[0045] The working principle of the three-legged steel frame embedded steel bar device in this application is as follows:

[0046] According to the spacing and embedded length of the three-limb steel frame designed in the drawing, the annular tube bodies 200 are arranged in a triangular layout, and the three annular tube bodies are connected end to end in sequence using the connecting assembly 200. The sleeve 301 is fixed to the side wall of the annular tube body 200, and the telescopic rod 302 is hinged to the side wall of another adjacent annular tube body 200. By adjusting the extension or retraction length of the telescopic rod 301, the spacing and angle of the annular tube bodies 200 can be accurately adjusted. Then, the device is fixed to the base to control the length of the embedded steel bars.

[0047] During construction, the steel bars that have been cut in advance are inserted into the annular tube body 200 with the two pre-buried groups of through holes aligned. When the steel bars are inserted into the through holes of the annular tube body 200, they are first inserted into the horn cavity 401 through the large horn mouth 406, so that the steel bar insertion process can be gradually adjusted to the center until they pass through the small horn mouth 407, so that the inserted steel bars are in a vertical straight line. By analogy, the three inserted steel bars are all in a vertical parallel position. The three steel bars are tightened and welded firmly with wire rod. Finally, when constructing the low side wall of the inverted arch, the three-legged steel frame cage processed in advance is placed in the low side wall of the inverted arch and reinforced. When constructing the second lining three-legged steel frame, the two lining three-legged steel frame processed in advance is welded firmly to the pre-buried three-legged steel frame cage according to the design requirements of the installation drawing to ensure the quality of the second lining construction.

[0048] Example 6

[0049] See attached Figure 4 To the attached Figure 5 This embodiment adds a positioning mechanism to Example 5. This positioning mechanism is located within the wall of the annular tube body 200 on the side away from the positioning cylinder 400. The positioning mechanism includes an annular mounting seat 501. Four fixing plates 502 are vertically mounted on the inner wall of the annular mounting seat 501. Each fixing plate 502 is provided with a hinged positioning plate 503. A telescopic spring 504 is provided between the fixing rod 502 and the positioning plate 503. The positioning plates 503 are arranged in a circular array on the inner wall of the annular mounting seat 501. The angle between the positioning plate 503 and the fixing plate 502 on the side where the telescopic spring 504 is provided is acute. The equally spaced mounting plates ensure uniform force on all sides of the inserted rebar, thus providing abutment and fixation for the rebar inserted into the annular tube body 200.

Claims

1. A device for accurately fixing pre-embedded steel bars on a three-legged steel frame, characterized by: It includes a base, which is provided with a steel bar positioning structure. The steel bar positioning structure includes three groups of annular tube bodies and a telescopically adjustable connecting component. The connecting component includes a sleeve and a telescopic rod. A fixed position bolt is provided on the side wall of the sleeve. The annular tube bodies are connected in pairs through the connecting component. The end of the telescopic rod is hingedly connected to the annular tube body, and the end of the sleeve is fixedly connected to the annular tube body.

2. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 1 is characterized in that: The base comprises an I-beam and two groups of connecting plates arranged on the I-beam, and the side walls of the annular tube body are fixedly connected to the connecting plates.

3. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 2 is characterized in that: There are two groups of steel bar positioning structures, which are respectively set on the side walls near the two ends of the I-beam.

4. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 3 is characterized in that: T-shaped connectors are provided at both ends of the bottom of the I-beam away from the steel bar positioning structure.

5. A device for accurately fixing three-legged steel frame embedded steel bars according to any one of claims 1 to 4, characterized in that: A positioning tube is embedded in the open end of one side of the annular tube body, and a horn cavity which gradually shrinks from top to bottom is provided on the positioning tube.

6. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 5 is characterized in that: A positioning mechanism is embedded in the open end of the other side of the annular tube body. The positioning mechanism includes an annular mounting seat. Several fixing plates are vertically provided on the inner wall of the annular mounting seat. A hinged positioning plate is provided on the fixing plate. A telescopic spring is provided between the fixing rod and the positioning plate.

7. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 6 is characterized in that: The circumferential array of positioning plates is arranged on the inner wall of the annular mounting seat, and the angle between the positioning plate and the fixing plate on one side of the telescopic spring is an acute angle.

8. The device for accurately fixing three-legged steel frame embedded steel bars according to claim 1 is characterized in that: A ruler is provided on the telescopic rod.

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