CN202100018U - High-precision positioning fixture for large-scale pre-buried bolts - Google Patents

Abstract

The utility model discloses a high-precision positioning fixture for large pre-embedded bolts, which comprises four adjustment mechanisms and a positioning plate. A positioning hole is arranged on the positioning plate, and the inner diameter of the positioning hole is smaller than the outer diameter of the pre-embedded bolt. The diameter is 0.7mm-0.9mm, and each of the adjustment mechanisms includes a base, and a fixing nut is fixedly connected to the base, and an adjustment screw is threaded on the fixing nut along the vertical direction, and the positioning plate supports Set on the top of the adjusting screw. The use of this fixture can ensure the level and positioning of the bolts. During use, the upper part of the bolts is fastened with nuts, and the middle and bottom of the bolts are welded with corresponding steel bars horizontally and obliquely, so that no displacement occurs up and down and horizontally, ensuring the construction plan. control parameter requirements.

Description

High-precision positioning fixture for large embedded bolts

technical field

The utility model relates to a positioning fixture, in particular to a high-precision positioning fixture for large pre-embedded bolts. the

Background technique

To solve the problem of high-precision positioning of large pre-embedded bolts in the construction process, adjusting the elevation and positioning of large bolts is the difficulty and focus in the construction process. The Chinese patent whose patent number is CN200410058289.9 discloses "a kind of anchor bolt positioning sleeve". The screwed anchor bolt threaded hole is at the top position, and the fixed bolt with a polygonal hole for rotation is received on the top surface in a threaded manner), and a pressing body is arranged between the anchor bolt threaded hole and the fixed bolt. In the body, with the screwing between the threaded hole of the anchor bolt and the anchor bolt, the top surface of the anchor bolt contacts the bottom end surface of the screw part of the fixing bolt, so that the anchor bolt and the main body are in a fixed state under the action of double nuts , In addition, in the pressing body, the contact portion between the top end surface of the anchor bolt and the bottom end surface of the fixing bolt) is spherical. This device is used for the implantation of a single anchor bolt and cannot be positioned with high precision. The Chinese patent with the patent number CN201020267898.6 discloses an "anchor bolt positioning device". The device includes a rigid platform, a positioning steel plate, and a gasket. The positioning steel plate is fixed on the rigid platform. The upper end passes through the positioning hole on the positioning steel plate successively, and is fixed by the nut after the gasket. Because the rigid platform and the positioning steel plate are integral to the device, it cannot be easily disassembled, which reduces the work efficiency, and can not accurately adjust and locate the verticality of the anchor bolts according to the situation on site, and the elevation. This device is used for the positioning of group bolts, not suitable for single bolt positioning. the

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a high-precision positioning fixture for large pre-embedded bolts that can well position the pre-embedded bolts and ensure their levelness and elevation. the

The high-precision positioning fixture for large pre-embedded bolts of the present utility model includes four adjustment mechanisms and positioning plates, and positioning holes are arranged on the positioning plates, and the inner diameter of the positioning holes is larger than the outer diameter of the pre-embedded bolts. Larger than 0.7mm-0.9mm, each of the adjustment mechanisms includes a base, a fixed nut is fixedly connected to the base, an adjustment screw is threaded on the fixed nut along the vertical direction, and the positioning plate supports the setting on top of the adjusting screw. the

The use of this fixture can ensure the level and positioning of the bolts. During use, the upper part of the bolts is fastened with nuts, and the middle and bottom of the bolts are welded with corresponding steel bars horizontally and obliquely, so that no displacement occurs up and down and horizontally, ensuring the construction plan. control parameter requirements. the

Description of drawings

Fig. 1 is the structural representation of the positioning plate of the high-precision positioning fixture for large embedded bolts of the present invention;

Fig. 2 is the structural representation of the adjustment mechanism of the high-precision positioning fixture for the large pre-embedded bolt of the present utility model;

Fig. 3 is a schematic diagram of the positioning plate shown in Fig. 1 being used for positioning embedded bolts. the

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail. the

As shown in the accompanying drawings, the high-precision positioning fixture for large pre-embedded bolts of the present utility model includes a positioning plate 1 and four adjustment mechanisms. The positioning plate 1 is provided with a positioning hole 2, and the positioning hole 2 The inner diameter is 0.7mm-0.9mm larger than the outer diameter of the embedded bolt 3. Each of the adjustment mechanisms includes a base 4, and a fixed nut 5 is fixedly connected to the base. An adjusting screw rod 6 is threaded in the straight direction, and the positioning plate is supported and arranged on the top of the adjusting screw rod. the

The use of this fixture is as follows:

Use the positioning hole of the special fixture positioning plate (the inner diameter is only 0.7-0.9mm larger than the designed bolt outer diameter, and its center is consistent with the design) to position the embedded bolts. When the anchor bolts are set in it, each bolt can produce The maximum displacement deviation is 0.35-0.45mm, and the maximum displacement deviation that any two bolts can produce is 0.7-0.9mm. Based on the characteristics of the special fixture itself, the precision control is better, so as long as the special fixture is used by the total station After the adjustment mechanism is supported and the horizontal and vertical adjustment mechanisms are used to accurately adjust the embedded bolts, the accuracy of the anchor bolts inserted in the fixture can be controlled within the design range. the

The fixture is supported by an independent adjustment mechanism in advance, the four corners use the adjustment mechanism, adjust the adjustment mechanism on the four corners, and use the level ruler set around the fixture as a reference to make the fixture on the same level, then fix the adjustment mechanism, and then pre-embed The bolt is inserted into the positioning hole which is only 0.7mm-0.9mm larger than its outer diameter. The bolt vertical adjustment mechanism jack (for adjusting the bolt elevation) is installed under the pre-embedded bolt. The bolt top is controlled by a level or a total station. Control it within the same design elevation, and tighten the nut on the top of the bolt so that it does not move upward. the

Claims (1)

1. large-scale pre-embedded bolt is used high-precision fixed position fixture; It is characterized in that: it comprises four guiding mechanisms and location-plate, on described location-plate, is provided with locating hole, and the internal diameter of described locating hole is than the big 0.7mm-0.9mm of external diameter of pre-embedded bolt; Each described guiding mechanism comprises base; On described base, be fixedly connected with hold-down nut, the adjustment screw rod that on described hold-down nut, vertically has been threaded, location-plate supports the top that is arranged on described adjustment screw rod.

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