SU1705494A1 - Device for ground intake control in suction dredge - Google Patents

Abstract

The invention relates to hydromechanization, in particular, to devices for automatic control of the soil extraction process and control of process parameters, i. applied to suction dredges used in the extraction of nonmetallic building materials from flooded deposits. The purpose of the invention is to increase the productivity of the suction dredge by eliminating overshoot when controlling the movement of the slurry. For this, the device is equipped with a differential pressure gauge 5, the negative chamber of which is connected via a pressure selector with a suction pipe of the ground pipe 10 with a soil receiving device 11. The vacuum sensors 1 and pressure 2 are connected to the suction pipe 10 and the pressure pipe 12, respectively. From the output of the sensors 1 and 2, the signals arrive at the inputs of the adder 7, which is connected to the pressure characteristic integration unit 8. The differential pressure gauge 5 is connected to the integration unit 9 and the control and alarm unit 6. The integration blocks 8 and 9 and the current load sensor 3 are also connected to block 6. The output of the control and signaling unit 6 is connected to the actuating element 4. The signal from the sensor 3 is fed to the input of the unit 3 only in the case when the pulling force in the frame-lifting winch cable exceeds the allowable value. In this case, the coil circuit of the relay of the block bis opens its output to the actuating element 4 and a signal is received to stop it. At the same time the transparency of the maximum load is turned on. The vacuum signals from the differential pressure gauge 5 cause a sharp decrease in the influence of the transport delay of the movement of the slurry on the useful signal when the conditions of the soil sampling system change. 3 il. co v vi 8 yu

Description

The invention relates to hydromechanization, in particular, to devices for the automatic control of the soil extraction process and the control of process parameters, and can be applied to suction dredges.

The purpose of the invention is to improve the performance of the suction dredge by

avoid overshoot when controlling slurry movement.

1 shows a block diagram of the device; figure 2 - installation of the differential pressure gauge on the suction pipe; FIG. 3 is a schematic diagram of a control and signaling unit.

The device contains a vacuum sensor 1 for the suction pipe, a pressure sensor 2 for the pressure pipe, a load current sensor 3, an actuator 4, a differential pressure gauge 5, a control and alarm unit 6, an adder 7, an integration block 8 and 9, a suction pipe 10, a ground receiver 11, a pressure ground pipe 12. The control and signaling unit B contains relays 13, 14 and 15, light signaling banners 16,17 and 18,19 and an audible signal element 20, a pressure gauge pressure selector 21.

The device works as follows.

The current values of the signals from the vacuum sensors 1 of the suction pipe 10 and the sensor 2 of the pressure of the pressure pipe 12 are fed to the input of the adder 7, which continuously measures the pressure of the soil pump and sends a signal proportional to the pressure characteristic to the integrator 8.

At the same time, from the differential pressure gauge 5, the signal is fed to the input of the integration unit 9 and to the input of the control and signaling unit 6, which controls the motor of the frame-lifting winch of the actuator 4.

During operation, in block 6, the vacuum signal at the inlet in the suction pipe 10 is set, which corresponds to the operating mode of the ground pump. The magnitude of this signal for the soil receiver 11 cannot be measured by pressure sensor 2 due to its low sensitivity, therefore this signal is measured by differential pressure gauge 5 through a negative chamber connected to the suction pipe 10 via a pressure selector 21 in the connection zone of the suction ground pipe 10 s by the ground receiver 11. Thus, the influence of the transport delay on the movement of the slurry on the useful signal is drastically reduced when the conditions of the ground sorter are changed. At the same time, the plus chamber of the differential pressure gauge 5 communicates with the environment at the installation site of the pressure sump 21 in order to compensate for the influence of the height of the water column when the depth of the soil intake is changed.

In the course of the grouser, when the signal from the differential pressure gauge 5 changes from zero to the operating value, the relay coil 14 of the control and signaling unit 6 is connected to the power supply via break contacts 13-1 and 15-1, relay 13 and 15, and break contact 5-1 of the output relay differential meter. Closing contact 14-3. and sunbathe a banner.

Upon reaching the vacuum signal from the differential pressure gauge 5 of the working value, contacts 5-1 open, the coil of relay 14 de-energizes, contacts 14-3 open, signal transparency 16 The descent goes out.

Block 6 turns off the actuator 4, the frame hoist stops. Contact 14-2 closes and the light comes on. 19 Operating mode.

When the inflow of material to the suction zone decreases, and consequently, the signal from the differential pressure gauge 5 is less than the operating value, the actuator 4 is switched on again.

At the same time, in blocks 8 and 9 of the integration, continuous signals of head H and vacuum Rwak at the inlet in the suction pipe are continuously integrated. d N / - y d Rwak

In this case, if-chgt1 0, and

01O I

0

then on

the output of blocks 8 and 9 appears logical 1, otherwise - O.

In the case of the occurrence of a cavitation operating mode of the soil pump, resulting from the collapse of the soil, clogging of the suction mouth of the soil receiver, etc., there is a sharp decrease in pump head pressure (-y- 0),

accompanied by a drop in the supply of slurry and, as a consequence, an increase in losses in the suction pipe

but

(-y-g 0). This includes weekends about t

relay blocks 8 and 9 integration. The closing contacts 8-1, 9-1 of the control unit 6 are closed, the coil of the relay 13 is turned on and the power supply circuit of the coil 15 is closed by the contact 13-2. The opening contact 15-2 breaks the chain of the transparency 19 Operating mode, and it goes out.

At the same time, the closing contact 15-3 turns on the transparency 16 Emergency mode and the sound alarm element 20. The control unit 6 includes an actuator 4 for lifting the winch.

When the emergency mode exits, contacts 8-1, 9-1 open, the coil of relay 13 de-energizes, contact 13-2 opens, the coil of relay 15 turns off and the device goes into operation.

The signal from the current-load sensor 3 is fed to the input of unit 6 only in the case when the pulling force in the frame-lifting winch cable exceeds the allowable value. In this case, the break contact

3-2 opens the circuit of coil 15, Block 6 receives a signal to stop the actuator 4, Contact 3-1 closes at the same time and the banner 18 Maximum load lights up.

Thus, due to a sharp decrease in the influence of the transport delay of the movement of the slurry on the vacuum signal in comparison with the prototype, overshoot is eliminated and, as a result, the sump pump’s productivity on the ground increases.

Claims (1)

The invention The control device for the process of groundwater suction projectile, containing suction and injection soil lines with ground receivers and vacuum and pressure sensors, the outputs of which are connected to the inputs of the adder, the output of which through the first integration unit is connected to the first input of the control and signaling system, the output of which connected to an actuator connected to the suction pipe, the load current sensor and the second integration unit are connected to the second and the third inputs of the control and signaling unit, differing from the fact that, in order to improve the performance of the suction dredger by eliminating overshoot in the management of the movement of the slurry, a differential pressure gauge is inserted into it, the output of which is connected to the input of the second integration unit and the fourth input of the control unit and - Station, one chamber of a differential pressure gauge it is connected through its pressure tap to the internal cavity of the suction pipe in the zone of its connection with the soil receiver, and the other chamber of the differential pressure gauge is connected to the environment at the location of the pressure tap on the suction pipe. K.minssoodi caper disnanonetaa5 K dyluso & ai canps oifanonstra S 24V four 8-1 9-1 13-S: 1 3-2