CN85202937U - Tensile testing machine for steel wire rope - Google Patents

Abstract

The utility model relates to tensile testing machine for steel wire ropes, in particular to the tensile measurement of the pull cords of pole towers in the electric power transmission and transformation system engineer. In the electric power transmission and transformation system engineer, a pole or an iron tower is set up in a definite distance, for increasing stability, the pole or the iron tower is pulled and fixed by steel wire ropes in every directions, and the pulling force of all steel wire ropes of the same pole is a definite number value. The purpose of the utility model is to provide a tensile testing machine for steel wire rope, which can be used during construction and is convenient and reliable. The measurement range is 100Kg-12000Kg, the measurement precision is 5%, and the maximum diameter of a measured steel wire rope is 30 mm.

Description

Tensile testing machine for steel wire rope

The present invention relates to the instrument of flexible steel wire tension measurement.

Existing tautness meter is when measuring, tautness meter is connected in the flexible steel wire backguy measures, when measuring the pulling force of shaft tower flexible steel wire backguy, just do not possess the engineering practical value, owing to there is not suitable surveying instrument, in the construction, mainly judge the pulling force size with sensation, so its reliability is on duty mutually in the past by experienced workman.

Task of the present invention be solve a kind of measuring steel wire hawser backguy pulling force instrument it can utilize method with flexible steel wire backguy parallel connection easily, in the flexible steel wire backguy, utilize " act on two power of rigid body point; its make a concerted effort to equal this two power geometry and; the diagonal line of the parallelogram that size and the direction of promptly making a concerted effort formed for these two power " theoretical foundation as principle, make the axial tension of flexible steel wire backguy, become certain radial force and measure, its relation (shown in Figure 3) is

$\mathrm{\Δ}=\sqrt{{(h+r)}^2+{(\frac{b}{2}-r+e)}^2}-\sqrt{{(h+r)}^2+{(\frac{b}{2}-r-e)}^2}$

L: distance between two support rollers.

F: the axial tension of flexible steel wire (rigidity and the elasticity that comprise flexible steel wire).

H: push rod (23) makes the distance of flexible steel wire displacement.

P: the radial force during flexible steel wire displacement H.

α: during flexible steel wire displacement H and the angle of horizontal level.

Pass through pedestal during measurement, the support of support and two support rollers, formation is in parallel with the flexible steel wire backguy, pass through driving lever, the rotation of leading screw, push rod is risen, promote flexible steel wire backguy displacement certain distance, at this moment just it has been produced a radial effect power, the reacting force that simultaneously relative push rod has also just had an opposite sign but equal magnitude, thereby drive downward pulling force of pull bar formation, and the pulling sensor, sensor becomes electric signal to the pulling force conversion of signals, pass to and show partly, show the pulling force that partly just demonstrates the flexible steel wire backguy, the present invention utilizes this structure and principle, and the problem of pulling force is measured in the parallel connection that has solved the flexible steel wire backguy, this measuring instrument is easy to carry, simple to operate, the pulling force of measurement range 100Kg-12000Kg (preferably 400Kg-12000Kg) measuring accuracy 5%, tested flexible steel wire maximum gauge 30mm.

The invention will be described in further detail below with reference to accompanying drawing.

Fig. 1 is the front view of this measuring instrument structure, and support (1), support roller (2), pedestal (6), sensor (7), demonstration be (35) partly.

Fig. 2 is the left view of this measuring instrument structure, driving lever (19), leading screw (20), dop body (21), push rod (23), hook (17), stage clip (28), pull bar (29), dial gauge (13), cantilever lever (25), sliding axle (26), screw pins (27).

Concrete structure characteristics of the present invention: symmetrical two support rollers (2), be fixed on the symmetrical two stands (1) by pin, roller (2) is that the center of circle can be rotated with the pin, two stands (1) passes through screw, pin is fastened on the triangle cast steel pedestal (6), driving lever (19) can be stirred leading screw (20) rotation, make leading screw (20), push rod (23) produces and rises or descending motion, dop body (21) is the higher whole steel part of intensity, it links to each other with pull bar (29) by pin, and can swing hook (17) one ends and be connected on the dop body (21) by pin, the other end then can collude on pull bar (29) when measuring firmly, sliding axle (26) can slide up and down in the hole of pull bar (29), the upper end contacts with stage clip (28), the lower end contacts with tested flexible steel wire, cantilever lever (25) by screw retention on sliding axle (26), contact with the measuring head of dial gauge (13) above the cantilever lever (25), pull bar (29) upper end is connected with sensor (7) by screw thread, the cylinder part of screw pins (27) and the gathering sill of pull bar (29) be sliding fit partly, pull bar (29) is slided in the center pit of pedestal (6), and can not rotate, sensor (7) is by lead and show that partly (35) are connected, and shows that partly (35) can demonstrate tested flexible steel wire backguy pulling force numerical value.

The structure of this measuring instrument and measurement: during measurement with this measuring instrument in the flexible steel wire backguy, form in parallel with the flexible steel wire backguy, backguy contacts with flexible steel wire to make two support rollers (2), distance between two support rollers (2) is the best 400mm-500mm of 200mm-1000mm(), rotate driving lever (19) then and drive screw mandrel (20), push rod (23) rises, promote the best 2.5mm-4mm of flexible steel wire backguy displacement certain distance 1mm-10mm(), 3 stressed measurements that formation is made up of two support rollers (2) and push rod (23), shift length drives cantilever lever (25) by sliding axle (26) and promotes the dial gauge measuring head, measure by dial gauge (13), push rod is stressed, drive dop body (21) and pull bar (29) and form downward pulling force, pass to sensor (7) by pull bar (29), sensor (7) becomes electric signal to the pulling force signal transition, deliver to demonstration partly (35), show that part (35) can demonstrate the pulling force of flexible steel wire backguy.

Claims (3)

1, a kind of flexible steel wire tension measurement instrument, it is characterized in that: on pedestal [6], l separated by a distance is provided with two support rollers [2], core at pedestal [6] has push rod [23], can make relative two support rollers of flexible steel wire [2] produce a displacement H, its shift length is measured by the dial gauge [13] that is fixed on the pedestal [6], and the suffered power of push rod [23] reaches sensor [7], and the signal that is produced by sensor [7] shows through showing part [35].When this measuring instrument is measured, in parallel with tested flexible steel wire backguy, contact stressedly with flexible steel wire by two support rollers [2] and push rod [23], form 3 stressed measurements, record the axial tension of flexible steel wire backguy with the radial force of certain numerical value.

2, according to claim 1, this measuring instrument is characterized in that two support rollers (2), by two stands (1), its left and right symmetrically is fixed on the triangle pedestal (6), the distance of two support rollers (2) is the best 400mm-500mm of 200mm-1000mm().

3, according to claim 1, this measuring instrument is characterized in that the distance of flexible steel wire displacement, by sliding axle (26), drive cantilever lever (25), promote the dial gauge measuring head, measured by dial gauge (13), the displacement of relative two support rollers of flexible steel wire (2) line is the best 2.5mm-4mm of 1mm-10mm().

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