CN2236642Y

CN2236642Y - Stand of instrument

Info

Publication number: CN2236642Y
Application number: CN 95239534
Authority: CN
Inventors: 朱爱华; 裴刚; 储海宁
Original assignee: Nanjing Water Conservancy and Hydrology Automatization Institute Ministry of Water Resources
Current assignee: Nanjing Water Conservancy and Hydrology Automatization Institute Ministry of Water Resources
Priority date: 1995-04-07
Filing date: 1995-04-07
Publication date: 1996-10-02
Anticipated expiration: 2005-04-07

Abstract

The utility model discloses a base of a tension wire apparatus, composed of a soleplate and a reference seat. Two reference bars are separately fixed on the reference seat and basically kept in parallel, and the extending direction is basically kept in line with the strike of the extension wire steel wire. Because of the two reference bars, the tension wire apparatus can ascertain the threshold value and the terminal value accordingly, and the distance between the two reference bars is invariable, which can be the revising length of displacement and the self-revising mark of normal working condition of the apparatus, so that the accuracy and the reliability of data measured by the tension wire apparatus are greatly promoted.

Description

The tensile-line instrument base

The utility model belongs to the technical field of Measurement of Dam horizontal shift, relates to the improvement to the relevant parts of tensile-line instrument, particularly relates to a kind of base of tensile-line instrument.

Tensile-line instrument is as the Basic Measuring Instrument of Measurement of Dam horizontal shift, generally adopted, this quasi-instrument has various model at present, the tensile-line instrument of above-mentioned various models normally utilizes the probe on the step motor drive instrument, mobile searching is measured the bracing cable steel wire that draws that is fixed on regulation position, dam two ends and is changed with respect to dam test section bit position, tries to achieve the relevant coordinate data of dam horizontal displacement.Above-mentioned tensile-line instrument exists following defective when carrying out actual measurement on dam, promptly drawing the bracing cable steel wire is to try to achieve according to the starting point and the terminal point that are fixed on a certain position on the dam with respect to the change in location of dam, therefore the accuracy of measurement data and reliability and threshold value and end point values have confidential relation, and the starting point of the operation of the probe in the existing tensile-line instrument and measurement count and terminal point all are to rely on the mechanical elasticity contact on the instrument to determine, because the defective of mechanical elasticity contact self, its each determined threshold value and end point values all have bigger error, so can't guarantee the accuracy and the reliability of each measurement data, the repeatability of measurement is also poor.

The purpose of this utility model is to provide a kind of tensile-line instrument base that has improved, and it can guarantee that instrument obtains a more stable threshold value and end point values in the course of the work all the time, to overcome the deficiencies in the prior art.

The technical solution of the utility model is as follows: the general structure of tensile-line instrument and its internal circuit still keep traditional form, the base of instrument is made of base plate and reference seat, offer fixed orifice on the base plate, fixed orifice is used for whole base is anchored at the dam pedestal, simultaneously also be used for other parts of tensile-line instrument are fixed on base, its key is also to be fixed with two baseline rods simultaneously on the reference seat that constitutes base, above-mentioned two baseline rods are keeping parallelism basically, and its bearing of trend (being the axis direction of baseline rod) should be consistent substantially with the trend of drawing the bracing cable steel wire.

Below in conjunction with accompanying drawing shown in the embodiment, the utility model is described in further detail.

Fig. 1 is the assembled state vertical view of tensile-line instrument base in tensile-line instrument;

The side view that Fig. 2 is Fig. 1 after the A-A line direction partly cut-away;

Fig. 3 is the oblique view of tensile-line instrument base.

See figures.1.and.2 and in conjunction with Fig. 3, the tensile-line instrument base is made of base plate [1] and reference seat [2], on base plate [1], offer fixed orifice [4], fixed orifice [4] is used for whole base is anchored at the dam pedestal, other parts of tensile-line instrument then are fixed on the base plate [1] of base again, on reference seat [2], also be fixed with two baseline rods [3] simultaneously, from Fig. 1 and Fig. 3 as can be seen, offer a recess [5] on the reference seat [2], this recess [5] is between two baseline rods [3], and recess [5] is for the ease of drawing bracing cable steel wire [6] and two baseline rods [3] and be in same plane and offering.

As can be seen from the figure, the basic keeping parallelism of two baseline rods [3], and the bearing of trend of two baseline rods [3] is consistent with the trend of drawing bracing cable steel wire [6] basically, and make them in the same plane as far as possible.

In fact, reference seat also can be divided into two separate parts and be separately fixed on the base plate, and just formed a recess this moment naturally between two reference seat and base plate, and its effect is consistent with the effect of above-mentioned accompanying drawing illustrated embodiment.

The utility model is owing to fixed two baseline rods simultaneously on the reference seat that constitutes base, in case therefore base integral body is anchored on the dam, two baseline rods are not have any change in location with respect to dam, if horizontal shift appears in dam, then two baseline rods just have change in location with respect to the bracing cable steel wire that draws that is fixed on regulation position, dam two ends, determine threshold value and end point values by two baseline rods, determine threshold value and end point values compared with available technology adopting mechanical elasticity contact, the accuracy of its measurement data will greatly improve, and be between two baseline rods owing to draw the bracing cable steel wire, and the constant distance between two baseline rods is constant, therefore as the self-correcting sign of the normal operating conditions of the gauge length of displacement and instrument, thereby the reliability of measurement data is also greatly improved.

In addition, because two baseline rods are to be anchored on the dam pedestal with base, no matter how other parts of instrument are changed or are reinstalled, the position of two baseline rods can not change all the time, therefore the survey data that is benchmark with two baseline rods can keep continuous, thereby can guarantee the instrument reparation, the continuity of the survey data before and after changing or reinstalling.

Claims

1, a kind of tensile-line instrument base, constitute by base plate and reference seat, offer fixed orifice on the base plate, it is characterized in that on reference seat, being fixed with simultaneously two baseline rods, above-mentioned two baseline rods are keeping parallelism basically, and its bearing of trend is consistent substantially with the trend of drawing the bracing cable steel wire.

2, according to the tensile-line instrument base of claim 1 regulation, it is characterized in that offering on the said reference seat recess, this recess is between two baseline rods.