SU1452956A1 - Apparatus for measuring angle in underground workings - Google Patents

Abstract

The invention relates to a measurement technique and is intended to determine the inclination angles of mine workings. The goal is to expand the field of application by providing simultaneous measurement of angles and checking the horizontal surface. The housing 1 contains two contact chambers (K) 2, an electrical display circuit (SI) and a variometric K 9 with a piston 10 and a rod 11. The contact K 2 is partially filled with conductive liquid (G) and closed with covers 4. The lower parts K 2 are connected electrically conductive channel 3, and the SI has contacts in the form of two adjustment screws 5 installed in covers 4. Channel 3 is hydraulically connected to 9. The upper parts of K 2 are connected by a compensation channel 13. At the same time, K 9 has a scale of 12, scaled to angles of inclination of the measured surface. Contact K 2 are made with height X, determined from the ratio tga., Where / is the distance between the K 2 axes, and a is the maximum measured angle of inclination. When the housing is tilted, 1 G closes the contact of one of the screws 5 and the SI is triggered. By rotating the rod 11, the piston 10 is moved downwards, while W closes the contact of another screw 5. The SI is triggered again. The value of the angle of inclination is removed on a scale of 12. 3 Il. S (l

Description

figure 1

five

The invention relates to the mining industry and measurement technology and can be used to determine inclination angles during the passage of inclined mine workings.

The aim of the invention is to expand the field of application by providing simultaneous measurement of angles and checking the level of the surface.

FIG. 1 shows a device for measuring angles in underground workings; on Yu fig. 2 - the same, top view; in fig. 3 - electrical circuit of the device.

A device for measuring angles in underground workings consists of a body 1 made of a non-conductive material, two contact chambers 2, the lower parts of which are connected by an electrically conductive channel 3. The contact chambers 2 are partially filled with a conductor w, with liquid (mercury) and sealed from above

Channel 13 is set at the same level by the law of the communicating vessels. At the same time, the level of mercury in the contact chamber, which occupies the lower position, increases, and in the contact chamber, which is in the upper position, decreases. Having risen, mercury closes the contact of the adjusting screw 5 in the lower contact chamber. At this time, the light bulb 7 lights up. When the head of the rod 11 is rotated clockwise, the piston 10 moves downwards in the variometric chamber 9, while the level of mercury and in the upper contact chamber increases.

The head of the rod 11 is rotated until the mercury level reaches the adjusting screw in the upper contact chamber, which is indicated by the ignition of the second light bulb, after which the reading of the angle of inclination on a scale of 12 is taken.

If you need to pre-mark the angle

lids 4, in which the control surface of the installed surface is installed (for example,

25

Ground contacts in the form of screws 5, to which wires 6 are attached.

The housing contains an electrical circuit in which electric bulbs 7, a contact bolt 8 and a power source, for example a battery (not shown), are included.

: The housing 1 also contains a variometric chamber 9 with a piston 10 and a rod 11, cutting on which chickens in the form of a helicoidal surface. At the top of the hour: this variometric chamber 9 has a scale on

{12, graded in tilt angles

I measured surface.

I The upper parts of the contact chambers are connected by a compensation channel 13 made in housing 1. Mercury 14 serves as a conductor of electric current. Pointer 15 is fixed on the head of the rod 11.

Contact chambers 2 are made in height / g, determined from the ratio

when passing the inclined mine working), then the head of the rod 11 combines the pointer 15 with a corresponding scale division of 12 and tilts the device until both lights come on.

The working range of the device for measuring angles from 0 ° to the maximum measured inclination angle a, at which mercury in the lower contact chamber 2 reaches the compensation channel 13. The device is not designed to measure angles when the specified level is exceeded, since the angular scale 12 calibrated to increase the level of mercury in the contact chamber to the compensation channel. When measuring the angle exceeding the limiting angle, the device does not show its true value due to the limited movement of mercury in the compensation channel.

h l-tga,

distance between axes of contact chambers;

maximum measured angle of inclination.

For example, if it is required to go through a mining excavation with an inclination angle of 30 °, then upon having taken the device works as follows. , c is the distance between the axes of the contact

In the horizontal position of the device, between the ends of the adjusting screws 5 and the surface of the mercury 14, there is a gap, the value of which depends on the required accuracy of the device to which it is adjusted.

When the device is horizontal, the lamps 7 are not turned on, which indicates that the surface to be tested is horizontal, since mercury is occupied in the contact chambers 2 at the same level, does not touch the screw contacts.

When installing the device on the surface to be tested, mercury 14 in both contact chambers 2 due to compensation chambers, for example, 150 mm minimum height of the contact chamber mm. With a decrease in the limiting measurable angle, the height of the contact chamber also decreases.

50For example at h l20-tglb °

40.5 mm.

In the manufacture of the device, it is advisable to provide several sizes (for example, the maximum measured angles are 10, 25, 40 °) with corresponding changes in the device dimensions in height. Due to the fact that the device is equipped with a compensation channel connecting the contact chambers, the latter turn

Channel 13 is set at the same level by the law of the communicating vessels. At the same time, the level of mercury in the contact chamber, which occupies the lower position, increases, and in the contact chamber, which is in the upper position, decreases. Having risen, mercury closes the contact of the adjusting screw 5 in the lower contact chamber. At this time, the light bulb 7 lights up. When the head of the rod 11 is rotated clockwise, the piston 10 moves downwards in the variometric chamber 9, while the level of mercury and in the upper contact chamber increases.

The head of the rod 11 is rotated until the mercury level reaches the adjusting screw in the upper contact chamber, which is indicated by the ignition of the second light bulb, after which the reading of the angle of inclination on a scale of 12 is taken.

If you need to pre-mark the angle

installed surface (for example.

installed surface (for example.

when passing the inclined mine working), then the head of the rod 11 combines the pointer 15 with a corresponding scale division of 12 and tilts the device until both lights come on.

The working range of the device for measuring angles from 0 ° to the maximum measured inclination angle a, at which mercury in the lower contact chamber 2 reaches the compensation channel 13. The device is not designed to measure angles when the specified level is exceeded, since the angular scale 12 calibrated to increase the level of mercury in the contact chamber to the compensation channel. When measuring the angle exceeding the limiting angle, the device does not show its true value due to the limited movement of mercury in the compensation channel.

The height h of the contact chamber represents the distance from the bottom of the chamber to the compensation channel (Fig. I), and the angle a is the angle between the horizontal level of mercury and the axis of the electrically conductive channel 3.

For example, if it is required to go through a mountain workout with an inclination angle of 30 °, then with the adopted distance between the axes of the contact

, c is the distance between the axes of the contact

cameras, for example, 150 mm minimum height of the contact chamber mm. With a decrease in the limiting measurable angle, the height of the contact chamber also decreases.

0For example at h l20-tglb °

40.5 mm.

In the manufacture of the device, it is advisable to provide several sizes (for example, the maximum measured angles are 10, 25, 40 °) with corresponding changes in the device dimensions in height. Due to the fact that the device is equipped with a compensation channel connecting the contact chambers, the latter are turned into communicating vessels and it is possible to measure the angles of the inclined surfaces. The presence of a variometric camera with an angular scale allows the use of the same electrical signal display circuit as for checking the horizontal surface. The execution of contact chambers with height guarantees the necessary limits for measuring tilt angles.

Claims (1)

Invention Formula A device for measuring angles in underground workings, comprising a housing with two partially filled current-carrying fluid and closed lids of contact cameras, the lower parts of which are connected by an electrically conductive channel, and an electrical display circuit with adjusting contacts in the form of two screws installed in covers, characterized in that, in order to expand the field of application by providing simultaneous measurement of angles and checking the level of the surface, it is provided with a variometric camera placed in the housing with a piston and rod hydraulically connected to an electrically conductive channel, and The body has a compensation channel connecting the upper 0 parts of the contact chambers, while the variometric chamber has a scale scaled at the angles of inclination of the measured surface, and the contact chambers are made of height A, determined from the ratio , where / is the distance between the axes of the contact chambers; a is the maximum measured angle of inclination.  7 8 FIG. 2 FIG.