SU1094962A1 - Cut thickness meter - Google Patents

Abstract

A CUTTING THICKNESSEER, containing a device for monitoring distance and a rotation angle sensor connected to it, executed on a reed switch, a motion transmission link to a reed switch control unit and a section for calculating the thickness of the slice. that, in order to increase reliability by simplifying the communication line, it contains about angle sensors, connection-. One two-wire communication line with the cutoff TOL1f1NY unit for computing the cutoff and associated with appropriate devices for controlling the distance, while the motion transmission link to the reed switch control element of each steering angle sensor is designed as a driver freely driving the form of the tandem with the suspension, the reed of each angle sensor rotated mounted on the ejector suspension and located in the free fall zone of the reed switch control element. with co

Description

The invention relates to devices for measuring the thickness of a slice with a coal plow and can be used in systems for automatically controlling the operation of a downhole machine in coal mines.

For measuring the movement of the downhole conveyor or chip thickness removed by the plow, a device is used to monitor the distance and an angle-of-turn sensor containing a reed switch, a motion transmission link on the pick-up control element and a section thickness calculating unit. In this device, the distances are measured by a steel cable wound on a spring-loaded coil. The length of the released cable is recorded and converted by the electronic device into a current signal.

In this device, a reed switch mounted on a movable housing is mounted on a rotating shaft. The control element can be a permanent magnet or a ferromagnetic flag L17.

However, the sensors require a two-wire communication line with a device for receiving information, and a two-wire cable is required for each switch. Parallel connection of these sensors to one two-wire line is impossible for the following reason: during rotation, the reed switch control element (magnet or erromagnetic (small step) can stop in any position, including when it acts on the reed switch. Since all the reed switches of the sensors are connected to the same two-wire line They will be blocked by this reed switch. The drawbacks of the device are also the multi-conductivity of the communication line over the lava and the inoperability of the system when any of the sensors is blocked by the reed switch.

The purpose of the invention is to increase reliability by simplifying the communication line.

The goal is achieved by the fact that in the slice thickness gauge, which contains a device for monitoring the distance and a rotation angle sensor associated with it, executed on the reed switch, a motion transmission link to the reed switch control unit and a section thickness calculator, connected with the appropriate devices for monitoring the distance and connected by one two-wire communication line with the unit for calculating the thickness of the 5 slice, while the link transfer motion on the control element reed. Each angle sensor rotation is made in the form of a leash, a freely driving control element of a reed switch, 0 which is made in the form of a tandem with a suspension, the reed switch of each angle sensor is mounted on a tandem, suspension and located in the free fall zone of the reed switch control element.

Due to the fact that the suspension control of the reed switch with a magnet is made in the form of a tandem, freely driven by a lead to the top point 0 of the circular path, after which the suspension, under its own weight, falls, passes briefly under the reed switch, and the reed switch itself is located on the tandem suspension in the left or 5, the upper right quadrant allows eliminating the magnet stop under the reed switch and blocking (putting it inoperable) with it a single two-wire line to all of the meters.

Thus, the proposed design makes it possible to increase the reliability of the device, exclude multi-cabling, and replace two-wire communication with several meters along the lava.

Fig. 1 shows a functional logic diagram of a slice thickness meter; Fig. 2 shows a device for controlling distance; on fig.Z - angle of rotation sensor; figure 4 - section aa in fig.Z.

The slice thickness gauge contains devices 1-7 for controlling the distance traveled by the bottomhole conveyor 8, on which they are mounted at intervals B. The feed hydraulic jacks through the bottomhole conveyor 8 press the reed switch 9 to the coal face of the lava — the actuator (strug) moved drives mounted in places C and D at the ends of the lava. The devices 1-7 for controlling the distance comprise a coil 10 with a steel cable 11 wound on it, the end 12 of which is fixed at the point D of the spent lava space. The coil 10 is mounted on the axis 13 in the brackets 14 and 15, mounted on the conveyor 8. One end of the axis 13 is equipped with a disc brake 16, which creates a brake brake at the expense of the spring 17 and the disk 18; on the reel when unwinding the cable. A freely rotating shaft 19 is mounted into the brackets 14 and 15 and a spring-loaded shaft 20 is mounted close to it. A few turns of the cable 12 are wound on the shaft 19. At one end of the shaft 19, on its front part there is a leash 21, which has a claw-like curved end 22, and a fitting 23 is fitted into the body 24. A connecting piece for scales 27 and 28 is mounted on the bearings 25 and 26. Suspension 27 has a radial section 29, the end of which is bent in the direction of the axis of the shaft 19 and a permanent magnet 30 is fixed on it. Suspension 28 has a radial section 31 on which mounted the load 32 and a radial section 33 in which the reed switch 34 is mounted, mounted in a non-magnetic capsule 35. Reed switch flexible wires 36 and 37 connected through the connector 38 with the two-wire line 39. The housing 24 is mounted on the bracket 14. The reed switch 34 is located along the axis of the shaft 19 and is rotated by ° C relative to the vertical (O 0 line) and section 31 so that it is located in the left upper quadrant rotation of the shaft 19 against the clockwise movement and, in the upper right, during its reverse movement. A narrow end 22 of the driver 21 is wound up on one side of the radial section 29 with a permanent magnet 30 The reed switches 34 of the angle of rotation sensors of all devices 1-7 are connected parallel to each other by a two-wire line 39 and their parallel circuit is fed to a block for calculating the thickness of the section that consists of counter 40, to the output of which a binary decoder 41 is connected, to the output of which is connected a group of 42 circuits AND 43-46, the outputs of which are fed to the OR 47-50 circuits, respectively, the outputs of the OR 47-50 circuits are assigned to a group of keys 51 which includes d d kl Avish information input to the programmable microcalculator 52, having a digital visual indication on the light indicator 53, each output of the decoder 41 through the circuits AND 43-46 and the OR circuit 47-50 is associated with its corresponding key (Fig. 1, a part of these outputs and schemes not displayed). For example, key 5 corresponds to the five output of the decoder 41. To the other inputs of the OR circuit 47-50, there are outputs of a group 54 of circuits AND 55-58, to which the outputs of the decoder 59, to the input of which the outputs of the device 60 of the plow position control 60, are input, The decoder 59 also opened contacts 61 of the movement of the plow in one direction and contacts 62 of movement of the plow in the other direction. The decoder 59 has potential outputs that it is associated with group 54 of the AND circuits, and pulse outputs that it is associated with the OR 63 circuit, the output of which is connected to multiple outputs of the delay line 64 and the computation mode setup key 65 (prefix key). The outputs of the delay line are fed to the group 42 of the And circuits, to the 66 group of the keyboard of the micro calculator 52, to the group 54 of the And circuits, to the input of the installation in O of the counter 40, to the input of the OR circuit 67, the output of which is fed to the keyboard group 66, to the key 68 start the calculation. In the same group, the button 69 for setting the automatic mode of operation and the key 70 for setting the starting address of the calculation program, outputs the delay line 64 are fed. The decoder 59 is designed so that the potential signal at one of the outputs during the entire time that the plow 9 is located in the installation section E of the corresponding device 1-7 to control the distance traveled by the bottomhole conveyor 8, and impulses a pulse signal when it reaches the point H during movement plow from drive B to drive G, and when point 3 is reached while moving the plow from drive G to drive B at each section E. This is ensured by contacts 61 and 62 from the movement of the plow to the defined decoder thoron. Points Ж and 3 lag behind the installation site of devices 1-7 of each section E by several meters, which is determined by the length of the executive body of the plow 9. This is necessary so that information processing takes place after the complete passage of the entire executive body (plow) through the installation site 1-7. Line 64 delay provides a delay filed at its input signal and can be executed in the form of a shift register or a logical counter. The slice thickness meter works as follows. Before working with the meter, a program for processing information from counter 40 is entered into the micro calculator 52, which is installed in O. before the operation. The program of the micro calculator contains as many parts as 1-7 devices are installed (there are seven in Fig. 1). Each part of the program is launched from a certain address assigned to it and performs the following actions: it accumulates the total movement at each of the installation points of devices 1 (measurement sites) by summing up the current and accumulated displacements, accumulates the number of passes of the plow at each measurement location, makes a division total travel by the number of passes, thereby determining. the average TOL1TSIN cut for the entire passage ° in from the points of measurement. Measuring-Tejtb produces an indication of the middle cut on the installation points of devices 1-7. As a micro calculator 52, a serial microcalculator Electronics BZ-34 can be used, which is used in the proposed cut thickness gauge. During the operation of the plow installation, after the passage of the executive body 9 and the removal of chips (slice thickness tl), the conveyor 8 is moved. Slaughter follows the passing plow. When this cable 11 is unwound from the reel 10, the shaft 19 is rotated, for example, counterclockwise. The lead 21, at its end 22, rotates, leads the suspension 27 with the magnet magnet 30 until the moment when the latter takes an approximately upper vertical position. Upon further rotation of the shaft 19 at an angle less than the angle oC, the suspension 27 due to the tweetoe operator, rotates, falls. During its fall, the reed switch 34 triggers, closes the contacts, and raises the pulse to the counter 40. At the same time, the shaft 19 can stop at any position, but the reed switch does not close at that time, i.e. The line 39 is not shunted and signals from many devices 1-7 can be sent to it, since the movement of the satellite 8 takes place behind the passing plane 9. After the fall, the suspension 27 can swing, being in the lower position, but due to the fact that the reed switch 34 is placed in the upper quadrant, there is no false triggering of it. During operation of the plow, the conveyor 8 may tilt along the bottom line, for example, overcoming soil irregularities. In this case, the reed switch 34 maintains the angle d. relatively vertical, since load 32 provides the necessary & turn. This preserves the operability of devices 1-7 at possible angles of inclination of the conveyor 8. Consider the case of processing information from moving in the first area where device 1 is installed. When the plow moves in this area from drive B to drive G, the potential output of the decoder 59, corresponding to this section, a potential is opened, which opens circuits AND 55 and 56. After the passage of the plow 9 through the installation site of device 1, pulses enter the counter 40. The number of pulses determines the movement of the conveyor 8 to the bottom (cut thickness l for one pass plow). After the point G is reached by the plane, an impulse is produced, which through the OR circuit 63 is fed to the input of the delay line 64 and the calculation preparation key 65. From the outputs of the delay line, the delayed signals are received in the following sequence in the order of their following: to the key 69 of the automatic mode of the micro calculator, to the key 70 to set the starting address of the nporpai4jbi permix, to the OR 55 and 56 circuit, to the OR 67 circuit inputs one of the outputs is delayed), on group 42 hem I, on the second input of circuit 67, on resetting the counter 40. At the same time, the microcore generator 52 performs the following actions: from the key 65 the set mode of its operation is prepared, from the key 69 is set

the automatic program calculation mode, from key 70, the entry of the starting address of the program is allowed, one decimal digit of which comes from the circuit And 55, and the second from the circuit 56 and through the charts 47 and 48 to the keys of the information input group 51. As a result, a starting address is entered into the microcalculator whose value is determined by the device number 1-7. From key 68, when the first pulse arrives, the first start-up program of the automatic counting is performed, as a result of which a number characterizing the total movement of the conveyor at the installation point of device 1, which was made before, is generated from the memory cell (at the beginning of operation it is zero). After this, a stop occurs, as the program has a stop command.

Next, a pulse received from the delay line 64 interrogates the circuits I 43-46, entering through the keyboard 51 a decimal number corresponding to the number of pulses accumulated by the counter 40. For example, in the case of five pulses, the key 5 is affected. Thereafter, key 68 a second pulse comes in and the micro calculator is launched to continue counting, which adds up the accumulated movement of conveyor 8 with the current reading of counter 40, a call from the memory of the number characterizing the number of passes (at the beginning of bots it is zero), adding to it units and storing its new value, dividing the calculated movement by the resulting value of the number of passes. Next, the counting stops, with an indication on indicator 53, of the average cutoff value. Then, a pulse from the delay line 64 counter 40 is reset to O. The display time of the average value of the slice is determined by the time

moving the plow to the next point G on another adjacent section of the installation of the device 1-7. When the plane reaches the neighboring point F

The processing of information is repeated in the manner described above, except that the starting address number is entered by another 4th schemes AND group 54 and has a different meaning.

The number identifies the starting address of the treatment program from the portion in which the plow is moving at this time. When a plow moves from K to B, the processing cycle of information measured by devices 1-7 is performed when the plane reaches point 3

The proposed meter allows you to automate the collection of information from many points of lava on the size of the slice:

Automate the process of calculating the average value of the cutoff, regardless of the number of passes and maneuvers by the plane in the lava.

This improves the accuracy of measurements, since the integral characteristic of the cut value is determined with a large number of plow passes, and this eliminates the influence of random factors (strength spread,

undershoot in one pass of the plow, i fallouts and other reasons).

The proposed meter allows a two-wire line 39,

which can be connected to a sufficiently large number of devices (for example, for a VZ-34 machine) 1-7, which eliminates the need for a multitude of cables laid along the lava.

and susceptible to damage from accidentally falling rock and coal, as well as to the effects of elements of the downhole mechanisms. In addition, by eliminating a large number of cables, installation, disassembly and repair of mechanisms in cramped downhole conditions (for example, replacement of pans, repair of a conveyor, etc.) is facilitated. The specified quality cut meter

increases the reliability of his work. / J i

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Claims (1)

CUTTING THICKNESS MEASURER, comprising a distance monitoring device and a rotational angle sensor connected thereto, mounted on a reed switch, a link for transmitting movement to a reed switch control, and a section thickness calculation unit, characterized in that, in order to increase reliability by simplifying the line connection, it contains η sensors of the angle of rotation, connected-. connected by one two-wire communication line with the unit for calculating the thickness of the cut and connected with the corresponding devices for controlling the distance, while the link for transmitting movement to the control element of the reed switch of each angle sensor is made in the form of a leash, freely leading the control element of the reed switch, which is made in the form of a pendulum with a suspension , the reed switch of each angle sensor * is mounted on a pendulum suspension and is located in the free fall zone of the reed switch control element. SU „, .1094962 tput.f l