RU19088U1 - STRENGTH DEVICE FOR MEASURING TENSION OF A FIXED FLEXIBLE BODY - Google Patents

Abstract

ESSAY

STRESS MEASURING DEVICE FOR TENSION MEASUREMENT

FLEXIBLE BODY

The utility model relates to measuring technique and can be used to determine the tension of a fixed flexible body, for example, a rope, cable, wire, etc., used in various sectors of the economy, in particular in the oil and gas industry.

The proposed utility model solves the problem of simplifying the power measuring device with increased accuracy, reliability, low cost and increased productivity of installation work.

To achieve the specified technical result in the force measuring device for measuring the tension of a stationary flexible organ for conveniently pressing the flexible organ with the help of a clamping-and-bending device (PUF), a lodgement is installed between the flexible organ and the force-measuring beam,

the measuring sensor uses a beam with struts mounted on it at a distance depending on the amount of deflection of the flexible organ, strain gages are installed on the beam between the press-bending device and the strut in a plane parallel to the load plane at an angle of 45 ° to the longitudinal axis of the beam, the struts are made with cutouts oval shape. The clamping and bending device comprises a bracket, a plate and nuts that press the flexible organ to the beam or may consist of a housing with recesses for installing the flexible organ and mounted on the beam and screw pair.

Description

STRENGTH DEVICE FOR MEASURING TENSION OF A MOBILE FLEXIBLE BODY

The useful model relates to measuring equipment and can be used to determine the tension of a fixed flexible body, for example, a rope, cable, wire, etc., used in various sectors of the economy, in particular in the oil and gas industry.

A device is known for measuring the length and tension of a flexible organ, comprising a support frame, a hydraulic cylinder with a plunger connected to a force indicator, three bypass rollers, one of which is mounted on a lever. (see auto certificate according to Cl. E21 B 475/00 No. 977739). This device allows you to measure the tension force of a movable flexible body, however, this rope tension device has low accuracy.

A force-measuring device for rope tension, such as a hydraulic weight indicator (GIV), is known, containing a body with racks, bearing rollers, the middle roller acts on a membrane, compressing liquid, a pressure gauge showing the tension of a flexible organ and a clip for fastening on a flexible organ (See the book Technological measurements and instruments.Isakovich R. Ya. M. Nedra, 1970, pp. 337–343).

The device allows you to measure the tension of a flexible organ. However, this device has low accuracy and is difficult to perform.

The proposed utility model solves the problem of simplifying the power measuring device with increased accuracy, reliability, low cost and increased productivity of installation work.

D 3 3 S 8

MKI E21 V 47/00

clamping and bending device (TTPU) between a flexible body

and a lodgement is installed in the load-measuring beam, and a beam with racks mounted on it is used as a measuring sensor, at a distance depending on the size of the flexible organ’s flex, strain gages are mounted on the beam between the non-press-bending device and the strut in a plane parallel to the load plane at an angle of 45 ° to the longitudinal axis of the beam, the posts are made with oval-shaped cutouts.

Distinctive features of the force measuring device from the prototype are the presence of a clamping and bending device, tool tray, strain gauges, the use of a beam as a measuring sensor, and the presence of oval-shaped cutouts on racks.

Due to the presence of these signs, the force measuring device will allow you to measure the tension of a stationary flexible organ, increase accuracy and reliability, as well as simplify the device by reducing the number of elements and by reducing the installation time of the force measuring device, increase the productivity of installation work.

In FIG. 1 shows a general view of a load-measuring device for measuring the tension of a stationary flexible body, and FIG. 2 shows a side view of the device.

The load-measuring device contains two racks 1 with oval-shaped cutouts for a flexible organ 2, a measuring beam 3 with strain gauges 4 glued on it, and a clamping and bending device 5, a lodgement 6, a plate 7, a nut 8.

The device operates as follows.

The force measuring device is installed on the fixed end of the flexible body of the lift used in the repair of oil and gas wells, or of the drilling rig, so that the flexible body 2 lies in the recess of the racks 1. The racks are installed at the ends of the measuring beam. Then the clamping and bending device 5 in the form.

for example, braces put on a flexible body and a measuring beam and

with the help of nlastina 7 and nuts 8, the flexible organ is pressed tightly against the lodgement 6 of the beam 3, and by setting the rods under the lodgement, the range of measured forces is regulated. Thus, the installation of a load measuring device on a flexible body requires only a few minutes. On a flexible body, the force measuring device is held by the clamping and bending device 5 and performs two functions:

fastening the device to a flexible organ, presses the force measuring device to the flexible organ;

bends a flexible organ to create a transverse bending or compressive (tensile) force of measuring transducers that convert a mechanical quantity into an electrical one, convenient for storing and transmitting over a distance. The tension of a broken organ with a force S (see Fig. 1) creates a force P bending beam 3. A measuring beam with strain gauges glued on it (8 pcs.) Serves to convert the measured force S into a proportional electrical signal. To protect the strain gauges from external mechanical influences, a cover is applied in the form of a cylinder (not shown in Fig. 1). Under the action of the measured force, the deformation of the measuring beam causes a change in the resistance of the strain gages, which leads to an imbalance of the strain gage and the appearance of an output signal proportional to the measured force.

The use of racks 1 on the measuring beam allows measuring with the help of strain gauges not normal stresses when the beam is bent, as is usually the case in such cases (see book S. A. Bernshtein. Resistance of materials. Higher school. M. 1961. pp. 146-147. ), and shear stresses. Measurement of normal stresses in a measuring beam with racks installed on it leads to a significant loss of accuracy (tests showed that the measurement error can reach up to 30%), which is unacceptable when

measuring the tension of a flexible organ. To reduce the measurement error in the proposed force measuring device, strain gages should be glued on both sides of the measuring beam between the stand and the clamp-bending device, an iodine angle of 45 degrees to the longitudinal axis of the beam. The plane of the strain gauge sticker should be parallel to the plane of the force bending the beam P. In this case, the measurement error decreases by more than an order of magnitude.

Thus, the choice of the location of the strain gauge stickers made it possible to install a clamping and bending device on the measuring beam of the rack, which significantly increased the reliability and reduced the cost of the force measuring device for tensioning the flexible organ due to: hardening, the device (there are no rollers, bearings, axles, a special clamp, etc.) .P.); in addition, the productivity of installation work has increased due to a reduction in the installation time of the power measuring device compared to the installation time of dryers and existing devices.

Claims (4)

1. A force measuring device for measuring the tension of a stationary flexible body, comprising a beam, a measurement sensor, a stand, characterized in that it further comprises a clamping and bending device, a tool tray mounted between the flexible body and the beam, strain gauges mounted on the beam between the clamping and bending device and a stand in a plane parallel to the load plane at an angle of 45 ^o to the longitudinal axis of the beam, and a beam with racks mounted on it is used as a measuring sensor.  2. The force-measuring device according to claim 1, characterized in that the pressure-bending device comprises a bracket, a plate and nuts, pressing the flexible organ to the beam.  3. The force-measuring device according to claim 1, characterized in that the pressure-bending device comprises a housing with recesses for installing a flexible body and mounted on a beam and a screw pair. 4. The load-measuring device according to claim 1, characterized in that the racks are made with oval-shaped cutouts.