CN204718580U - A kind of convergence measurement device - Google Patents

Abstract

The utility model relates to a kind of convergence measurement device, this device be by pulley yoke, the deflection sheave be arranged on pulley yoke, the test rope be wrapped on deflection sheave, be suspended on test rope end counterweight, be arranged on dynamo-electric dial gauge below counterweight and combine for the magnet stand of fixing dynamo-electric dial gauge and form; Accuracy can be brought up to 0.01mm by 0.1mm by the utility model, and can real-time monitored real time record convergent deformation situation by dynamo-electric dial gauge, in addition, test rope diameter of the present utility model is little, counterweight elongate form, the impact of test process apoplexy on measurement result can be reduced, little by external interference, ensure measuring accuracy, measuring distance can by tens centimetres to tens meters, applied widely.

Description

A kind of convergence measurement device

Technical field

The utility model belongs to the surface convergence field of measuring technique such as tunnel cross-section, mine working, cofferdam, particularly a kind of convergence measurement device.

Background technology

Convergence measurement refers to the measurement of relative deformation to point-to-point transmission and deformation rule.Current tunnel cross-section, mine working, cofferdam etc. all need to carry out convergence measurement.Current convergence test method or convergence instrument, it is with survey instruments such as tape measure, Sopwith staff, survey line and weights mostly, distance between the lateral wall in direct measurement tunnel, tunnel cross-section, cofferdam etc. or top, the end two measuring point, due to highly inconvenient observed reading, normally just can read data by means of instruments such as catoptrons, and need many people cooperation jointly to fulfil assignment, therefore, in measuring process, there is the defects such as measuring error is large, inefficiency, measuring accuracy are low, when therefore applying in Practical Project is measured, there is limitation.

Utility model content

In order to solve the deficiency existing for above-mentioned convergence measurement technology, the utility model provides one and utilizes deflection sheave to change convergent deformation direction, little by external interference, and structure is simple, observe convergence measurement device easily.

The technical scheme that the utility model is adopted to achieve these goals is: this device be by pulley yoke, the deflection sheave be arranged on pulley yoke, the test rope be wrapped on deflection sheave, be suspended on test rope end counterweight, be arranged on dynamo-electric dial gauge below counterweight and combine for the magnet stand of fixing dynamo-electric dial gauge and form; Test rope is walked around deflection sheave 90 ° and is turned to, and by horizontal direction to vertical direction to downward-extension, is distributed in test rope above dynamo-electric dial gauge measuring staff below counterweight and counterweight central shaft and counterweight on same straight line.

Above-mentioned counterweight is made up of body and the suspension ring that are arranged on bodies top center, screw is processed with at the top of body, threadedly be connected with suspension ring, be processed with groove at the bottom centre position of body, the measuring staff of dial gauge extends in body recess.

The body height of above-mentioned counterweight and the ratio of bottom end face diameter are 2:1 ~ 3:1.

The body of above-mentioned counterweight is the frustum of a cone or right cylinder, and test rope is galvanized wire or wire rope.

The convergence measurement device that the utility model provides utilizes pulley that the convergent deformation of the horizontal direction of test rope is converted to the displacement of vertical direction, utilize counterweight, to test wire saws, dynamo-electric dial gauge reading is crossed in convergent contour accommodation to embody, thus convenient observation, read data and can and data are corrected, eliminate the cable sag effect that the deadweight owing to testing rope produces, make measurement result accurately and reliably.

Compared with prior art, accuracy can be brought up to 0.01mm by 0.1mm, and can real-time monitored real time record convergent deformation situation by dynamo-electric dial gauge, in addition, test rope diameter of the present utility model is little, counterweight elongate form, can reduce the impact of test process apoplexy on measurement result, little by external interference, ensure measuring accuracy, measuring distance can by tens centimetres to tens meters, applied widely.

Accompanying drawing explanation

Fig. 1 is the convergence measurement apparatus structure schematic diagram of embodiment 1.

Fig. 2 is counterweight 4 structural representation in Fig. 1.

Fig. 3 is counterweight 4 structural representation of embodiment 2.

Embodiment

Now by reference to the accompanying drawings the technical solution of the utility model is further described, but the utility model is not limited only to following enforcement situation.

Embodiment 1

See Fig. 1, the convergence measurement device of the present embodiment is combined formed by pulley yoke 1, deflection sheave 2, test rope 3, counterweight 4, dynamo-electric dial gauge 5 and magnet stand 6.

Pulley yoke 1 and the deflection sheave 2 of the present embodiment belong to conventional components, test rope 3 adopts diameter to be the thin galvanized wire of 0.7mm, test rope 3 edge between tested point is horizontally disposed with, extend straight down after walking around deflection sheave 2, occur 90 ° to turn to, counterweight 4 is hung with in the lower end of test rope 3, conveniently suspend in midair, see Fig. 2, the counterweight 4 of the present embodiment is made up of suspension ring 4-1 and body 4-2, body 4-2 is tapering is 0.5, height is 10cm, upper bottom surface diameter is 2cm, bottom surface diameter is the circular cone structure of 7cm, wind-force can be reduced in test process on the impact of measurement result, employing stainless steel material is made, also can according to the physical dimension of concrete Use Adjustment counterweight 4.A screw is processed with at the top of body 4-2, the bottom of suspension ring 4-1 extends in body 4-2 screw and is threadedly connected with body 4-2, also a groove is processed with at the bottom centre position of body 4-2, magnet stand 6 below body 4-2 is installed with a dynamo-electric dial gauge 5, the measuring staff of this dynamo-electric dial gauge 5 extends in the groove of body 4-2, make body 4-2 that measuring staff can be caused when vertical direction is subjected to displacement change to move linearly, thus embodied by the pointer of dynamo-electric dial gauge 5.

When carrying out convergence measurement with above-mentioned convergence measurement device to the both sides of mine working, concrete method is realized by following steps:

(1) test point A place on the left side wall free end of test rope 3 being fixed on mine working, test point B place on right side wall deflection sheave 2 frame 1 being fixed on mine working, test point A and test point B is on same horizontal line and be in same section;

(2) test the deflection sheave 290 ° that the other end of rope 3 walks around deflection sheave 2 frame 1 to turn to, extend straight down, the counterweight 4 hung at test rope 3 end is at Action of Gravity Field by stretching for test rope 3, and the dynamo-electric dial gauge 5 be fixed on bottom counterweight 4 tests out the displacement initial value L of vertical direction before the convergent deformation between test point A and test point B ₀;

(3) after t hour, the raw convergent deformation of test configuration produce between test point A and test point B, the convergent deformation of horizontal direction is made to be converted to the displacement of vertical direction by deflection sheave 2, test rope 3 moves in the horizontal direction and affects counterweight 4 to be subjected to displacement at vertical direction, counterweight 4 moves and causes the measuring staff of dynamo-electric dial gauge 5 to move, by dynamo-electric dial gauge 5, shift transformation is converted to angle change to be indicated by pointer, reads the numerical value of dynamo-electric dial gauge 5 in real time, and be recorded as L _i;

(4) by formula L _i-L ₀=Δ L _i', calculate the convergency value Δ L that test configuration thing is corresponding after t hour _i';

(5) correct according to the convergence measured value of following formula to step (4), deadweight due to convergence test rope 3 makes it produce certain sag, the convergence variable quantity of the test rope 3 that t is surveyed in above-mentioned steps (4) is caused to be not equal to the true amount of convergence of A, B 2, therefore, when calculating convergency value, need to consider this cable sag effect, get rid of the error brought owing to testing rope 3 sag, error formula is see following formula:

$\mathrm{\δ}=\frac{G}{q}(\frac{2G}{q}-1)\[\sinh \frac{qS}{2G}\cosh \frac{qS}{2G}-\sinh \frac{q(S-{{\mathrm{\ΔL}}_i}^{\′})}{2H}\cosh \frac{q(S-{{\mathrm{\ΔL}}_i}^{\′})}{2H}\]-1.5{{\mathrm{\ΔL}}_i}^{\′}$

In formula: G is counterweight 4 weight;

Q is that convergence test rope 3 is along the equally distributed deadweight of rope arc length;

S is the horizontal range between A, B two test points;

Determine that finally restraining actual value is: Δ L _i=Δ L _i'-δ.

Embodiment 2

See Fig. 3, the counterweight 4 body 4-2 of the present embodiment can also be right cylinder, and it is highly 12cm, and diameter is 4cm, and guarantee is slim-lined construction, and test rope 3 also can be replaced with wire rope.

Other parts and annexation identical with embodiment 1.

The convergence measurement method of the present embodiment is also identical with embodiment 1.

The shape and size of the counterweight 4 in above-described embodiment can adjust according to reality, be not limited only to above-mentioned specification, shape, if but meet its height when being within the scope of 2:1 ~ 3:1 with bottom end face diameter ratio, suffered external interference is little, the impact of self Errors on Measuring Values of counterweight 4 is relatively little, ensures that measurement result is more accurate.

Claims (4)

1. a convergence measurement device, is characterized in that: this device be by pulley yoke (1), the deflection sheave (2) be arranged on pulley yoke (1), the test rope (3) be wrapped on deflection sheave (2), be suspended on test rope (3) end counterweight (4), be arranged on counterweight (4) below dynamo-electric dial gauge (5) and for fixing dynamo-electric dial gauge (5) magnet stand (6) combine form; Test rope (3) is walked around deflection sheave (2) 90 ° and is turned to, by horizontal direction to vertical direction to downward-extension, the test rope (3) of dynamo-electric dial gauge (5) measuring staff and counterweight (4) central shaft and counterweight (4) top that are distributed in counterweight (4) below is on same straight line.

2. convergence measurement device according to claim 1, it is characterized in that: described counterweight (4) is made up of body (4-2) and the suspension ring (4-1) that are arranged on body (4-2) top center, screw is processed with at the top of body (4-2), threadedly be connected with suspension ring (4-1), be processed with groove at the bottom centre position of body (4-2), the measuring staff of dial gauge extends in body (4-2) groove.

3. convergence measurement device according to claim 2, is characterized in that: body (4-2) height of described counterweight (4) is 2:1 ~ 3:1 with the ratio of bottom end face diameter.

4. convergence measurement device according to claim 3, is characterized in that: the body (4-2) of described counterweight (4) is the frustum of a cone or right cylinder, and test rope (3) is galvanized wire or wire rope.