SU1237472A1 - Device for automatic pumping of tyre - Google Patents

Description

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The invention relates to a device for pumping vehicle tires and agricultural machines on assembly lines in a machine-building industry.

The purpose of the invention is to expand the scope and improve pump performance.

FIG. 1 shows a block diagram of a device for automatically inflating tires; in fig. 2 is a schematic diagram of the device; in fig. 3 - the tip of the device.

The device contains an inlet measuring valve 1, connecting the Yupdia cavity of the tire 2 to an air supply source, for example, with a compressor (not shown), 10

The output of the three-membrane relay 25 is connected to the input of the switching-on relay 27, the output of which is the output of element 7, i.e. through the output of the on relay 27, the supply pressure is supplied to all units of the device. The line of communication of one of the outputs of block 15 through uncontrolled pneumatic resistance 24 with a three-membrane relay 25 is a line for supplying a switching-off signal to the element 7 of the trigger.

Memory unit 8 is made of a three-membrane relay 28, a three-membrane relay 29, which functions as a trigger with an OR 30 valve, and a pneumatic repeater 31, which is connected to the atmosphere through the normally open contact of a three-membrane relay 29. By stick valve 3, which serves to connect the connection of the three-membrane relay 29 with the unit

neither the cavity of tire 2 with the atmosphere, the additional control valve 4 for disconnecting the tips 5 from the cavity of tire 2 at the end of the pumping cycle, the sensor 6 of the pressure 13 and the block 12 signal the disconnecting unit 8 from the atmosphere. Through the normally closed contact of the three-membrane relay 28, unit 8 is connected to pressure sensor 6.

of laziness, which transforms the current JQ value of a three-membrane relay 28 from a block of 13 out30

pressure in tire 2 in proportion to the pressure to be measured, device start element 7, turning on the entire device, memory block 8, comparison block 9 for comparing the set and measured pressures, pressure setpoint generator 10, mode switching unit 11, block

12Zadani intake and exhaust time, block

13 measurement time delay, relay 14 delayed landing of tire beads on time rim, control signal generating unit 15 and pneumatic valve OR 16. The device is also equipped with a button 17 for manually disconnecting the handpiece 5, a manual valve 18 for connecting the device to the air supply source and a regulator 19, with a pressure gauge 20 for regulating the pressure in the measurement system, a mimic with an indication of five main cycle transitions (not shown).

The pressure sensor 6 is made of two pneumatic resistances: an adjustable 21 and an unregulated 22, as a result of which conductivity ratio is achieved, the output signal is proportional, and a compare five-membrane element 23 to which from the air supply source (the measurement time does not open; the signal for the output signal from the pressure sensor 6, and from the output of block 15 is a blocking signal, i.e. the signal for storage. The output of the pneumatic repeater 31 is the output of block 8, which is connected to the input of block 9 and swing unit 11.

Comparison unit 9 is made of a three-membrane comparison element 32 and a three-membrane relay 33, the normally closed contact of which is connected to memory block 8, through which the measured pressure is supplied. A three-membrane relay 33 is supplied with a control signal to the measurement from block 13. A set pressure is applied to element 32 from block 11. The output of the comparison element 32 is the output of block 9, which is connected to relay 14 and block 15.

Pressure setting unit 10 comprises a powerful control setting unit 34 for setting pumping pressure or operating pressure in tire 2 and a low-power setting control unit 35 for setting the pressure of the outset, the outputs of which are connected to block 11.

Unit 11 is made of four three-membrane relays 36-39, with normally open contacts of three-membrane relays 36

40

zan) through regulator 19 pressure 45 and 39 are connected to the atmosphere, relay 37 -

feed pressure. The communication lines of the cavity of the tire 2 through the tip 5, adjustable pneumatic resistance 21 with the entrance of the comparison element 23 is the input for the pressure sensor 6. The output of the five-membrane comparing element 23 is the output of the pressure sensor 6, which is connected to the input of the element 7 and the input of the memory block 8. Element 7 is made of uncontrolled pneumatic resistance 24, a three-membrane relay 25 that performs the functions of a trigger with an OR 26 valve, and turns on a relay 27. The supply pressure is supplied to the air source through a pressure regulator 19.

the output of the setting device 35 of the setting device 10, the relay 38 with the output of the block 8 and the normally closed contact of the three-membrane relay 39; normally closed contacts of three-membrane relays 36 and 37 are connected to the output

 setting device 35, setting device 10, (low-power) and relay 38, with block 12. The switching signal is supplied from the output of relay 14.

The intake and exhaust timing task unit 12 is made of a three-membrane comparison reference 40, a five-membrane comparison element 4, and a continuous linearly increasing pressure generator 42, made according to the known scheme of three

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The output of the three-membrane relay 25 is connected to the input of the switching-on relay 27, the output of which is the output of the element 7, i.e. through the output of the on relay 27, the supply pressure is supplied to all units of the device. The line of communication of one of the outputs of block 15 through uncontrolled pneumatic resistance 24 with a three-membrane relay 25 is a line for supplying a switching-off signal to the element 7 of the trigger.

The memory unit 8 is made of a three-membrane relay 28, a three-membrane relay 29, which functions as a trigger with an OR 30 valve, and a pneumo-repeater 31, which is connected to the atmosphere through the normally open contact of the three-membrane relay 29. By linking the three-membrane relay 29 with the unit

13 and a block 12, a signal is provided to shut off the block 8 from the atmosphere. Through the normally closed contact of the three-membrane relay 28, unit 8 is connected to pressure sensor 6.

 three-membrane relay 28 from the block 13

The measurement time is given by the opening signal; it is the signal for receiving the output signal from the pressure sensor 6, and from the output of the block 15 - the locking signal, i.e. the signal for storing. The outlet of the pneumatic rectifier 31 is the output of block 8, which is connected to the input of block 9 and the input of block 11.

Comparison unit 9 is made of a three-membrane comparison element 32 and a three-membrane relay 33, the normally closed contact of which is connected to memory block 8, through which the measured pressure is supplied. A three-membrane relay 33 is supplied with a control signal to the measurement from block 13. A set pressure is applied to element 32 from block 11. The output of the comparison element 32 is the output of block 9, which is connected to relay 14 and block 15.

Pressure setting unit 10 comprises a powerful control setting unit 34 for setting pumping pressure or operating pressure in tire 2 and a low-power setting control unit 35 for setting the pressure of the outset, the outputs of which are connected to block 11.

Unit 11 is made of four three-membrane relays 36-39, with normally open contacts of three-membrane relays 36

and 39 are connected to the atmosphere, relay 37 -

the output of the setting device 35 of the setting device 10, the relay 38 with the output of the block 8 and the normally closed contact of the three-membrane relay 39; normally closed contacts of three-membrane relays 36 and 37 are connected to the output

setting device 35, setting device 10, (low-power) and relay 38, with block 12. The switching signal is supplied from the output of relay 14.

The intake and exhaust timing task unit 12 is made of a three-membrane comparison element 40, a five-membrane comparison element 4 and a generator 42 of continuous linearly increasing pressure, made according to the known scheme of a three-membrane relay 43, pneumatic intensity 44, adjustable pneumatic pressure 45, pneumatic repeater 46 with a shift and pneumatic repeater 47. The generator 42 is turned on from the power supply source through the element 7. From the block 13 a switching signal is fed to the input of the three-membrane relay 43 of the generator 42, the output of which is Dinen with normally closed contact of the three-membrane relay 38 of block 11 and with one

a dinene unit with a memory unit 8 for transmitting a signal for storage and with a unit 13 for transmitting a switching signal. In addition, the communication line of the output of the relay 69 to the inputs of the relay 70 and 71 serves to transmit a switching signal to a three-membrane relay 70 and to transmit a switching-on signal for a three-membrane relay 71 acting as a trigger with the OR valve 74. The output of the three-membrane relay 67 is connected

from the inputs of the five-membrane element 41 compared to the input of the three-membrane relay 68, the output of the terminal, the other two inputs of which are connected by a valve 4 and off to the outputs of the three-membrane relays 38 of the input element 7. The output of the three-membrane 39 of the block 11, and the output of the five membrane-based relay A relay 70 is connected to the input of a relay 71, comparison test 4 is connected to one of the inputs of a three-membrane element 40, the comparison of which is connected to the exhaust valve 3. The output link of the unit 13 is through the communication line

The other input of which is connected to a three- 5 unregulated pneumatic resistance 72 with a membrane relay 37. The output of the three-membrane inputs of the three-membrane 66 and 67 transmits40

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Line element 40 is the output of block 12.

Unit 13 is made of a three-membrane relay 48, which functions as a trigger with an OR 49 valve, whose outputs are connected in series to adjustable resistance 50 with pneumatic intensity 51 and through three-membrane relay 52 and adjustable pneumatic resistance 53 with pneumatic intensity 54 to three-membrane relay 55, valve 25 OR 56, pneumatic valve 57 and uncontrolled pneumatic resistance 58. An input signal is supplied to the input 48 of the relay 12 from block 12, and a locking signal to the other input through the uncontrolled pneumatic resistance 58 from block 15. The communication link for the output of the three-membrane relay 52 through the valve OR 56 to the inlet valve 1 is signaled to the measurement. The output of the three-membrane relay 55 is the output of block 13, which is connected to block 9 and block 15.

thirty

the signal is turned on, and the signal turning off these relays is transmitted through the communication lines of the inputs of these relays to the output of the comparison unit 9, this signal also turns off the relay 69. Relay 70 is connected to the output 52 of the relay 13 of the unit 13 to transmit a signal to prohibit air release from the street 2

The tip 5 is provided with a connecting pipe 2 with three inlet ports 75-77, connected respectively to the inlet 1, the outlet 3 and the disconnecting 4 valves. In the body 78 of the handpiece 5, there is a pusher 79, which interacts through the element 80 with a piston 81, as well as with a check valve 82. In the lid 83 and in the body 78, a chamber 84 is provided, which is separated by a check valve 82 from the cavity 85, which, in turn, connected to the input channel 76 and channel 86 in the push rod 79. Channel 86 is connected to the subchamber chamber 87, and the supra piston chamber 88

Relay 14 contains a three-membrane relay 35 connected to input channel 77

59, which functions as a trigger with an OR 60 valve, to the input of which an input signal is applied, and the output through an adjustable pneumatic resistance 61 with a pneumatic intensity 62 is connected to one of the inputs of a three-membrane Q element 63, the other input of which is connected to a pneumo-repeater 64. The output of a three-membrane element 63 is connected to the input of a turning-on relay 65, the output of which is the output of relay 14 connected to block 11 and block 15.

Unit 15 is made of three-membrane relays 66-71, uncontrolled pneumatic resistance 72 and valve OR 73. Supply pressure from element 7 is connected to normally closed contacts of three-membrane relays 66-71. Normally closed contacts of three-membrane relays 67 and 69 are connected to the relay output 14. The normally open contacts of the three-membrane relays are connected to the atmosphere, except for the three-membrane relay 68, the normally open contact of which is connected to the button 17 for manually disconnecting the tip 5. The outputs of the three-membrane relays 66 and 69 through the valve OR 73 are connected The solution works as follows.

Valves 2 are inserted into the hole of the element 80, pressing the pusher 79, which, moving along the axis of the housing 78, opens the valve 82. Air under pressure from the power source through the controlled inlet valve 1, the inlet channel 76 and the chamber 84 enters the cavity 85 and then through channel 86 into the bristle chamber 88. Thereafter, the piston 81 stops, 45 rests against the housing 78, and the piston 81, continuing to move, compresses the element 80, which reliably captures and seals the valve 2. Air from the channel 86 enters in the back 2. Simultaneously from the cavity 85 flow air pressure (P :) through inlet channel 75 to pressure sensor 6, which converts it to

55

R | CR,

where P is the air pressure by valve 2 valve equal to the pressure of the pneumatic network (at the moment of inflation it is equal to the current tire pressure);

a dinene unit with a memory unit 8 for transmitting a signal for storage and with a unit 13 for transmitting a switching signal. In addition, the communication line of the output of the relay 69 to the inputs of the relay 70 and 71 serves to transmit a switching signal to a three-membrane relay 70 and to transmit a switching-on signal for a three-membrane relay 71 acting as a trigger with the OR valve 74. The output of the three-membrane relay 67 is connected

with the input of a three-membrane relay 68, the output of which is connected to the exhaust valve 3. On the communication line of the output of block 13 through

the signal is turned on, and the signal turning off these relays is transmitted through the communication lines of the inputs of these relays to the output of the comparison unit 9, this signal also turns off the relay 69. Relay 70 is connected to the output 52 of the relay 13 of the unit 13 to transmit a signal to prohibit air release from the street 2

The tip 5 is provided with a connecting pipe 2 with three inlet ports 75-77, connected respectively to the inlet 1, the outlet 3 and the disconnecting 4 valves. In the body 78 of the handpiece 5, there is a pusher 79, which interacts through the element 80 with a piston 81, as well as with a check valve 82. In the lid 83 and in the body 78, a chamber 84 is provided, which is separated by a check valve 82 from the cavity 85, which, in turn, connected to the input channel 76 and channel 86 in the push rod 79. Channel 86 is connected to the subchamber chamber 87, and the supra piston chamber 88

connected to input channel 77

connected to input channel 77

The device works as follows.

Valves 2 are inserted into the hole of the element 80, pressing the pusher 79, which, moving along the axis of the housing 78, opens the valve 82. Air under pressure from the power source through the controlled inlet valve 1, the inlet channel 76 and the chamber 84 enters the cavity 85 and then through channel 86 into the bristle chamber 88. Thereafter, the piston 81 stops, abutting against the housing 78, and the piston 81, continuing to move, compresses the element 80, which reliably captures and seals the valve 2. Air from the channel 86 enters Schinu 2. At the same time from the cavity 85 feeds the air pressure (P :) through the inlet channel 75 in the pressure sensor 6, which converts it

R | CR,

where P is the air pressure by valve 2 valve equal to the pressure of the pneumatic network (at the moment of inflation it is equal to the current tire pressure);

k is the proportionality coefficient, chosen so that in the pressure measurement range P from zero to the outlet pressure developed by the air supply source, the outlet pressure varies in the range of operation of the elements of the pneumatic automation of the device; PI pressure at the outlet of pressure sensor 6.

The output signal of the pressure P | through the element 7, the supply pressure is supplied to the remaining blocks of the device, i.e. The device starts up. At the same time, from unit 10 of pressure, through block 11, to the three-membrane element 40 of comparison of block 12, the task of time for intake and exhaust, and element 32 of comparison of block 9 receives a signal corresponding to a predetermined value of the outset pressure (P3). At the same time, in block 12, a generator 42 is turned on, which, via element 41, supplies a three-membrane comparison element 40 to a continuous ramp signal, which in this element is compared with a predetermined pressure value (RF). The time during which the signal produced by the generator 42 increases from zero to the value of P-2 is the duration of the first pump cycle. A single discrete signal appearing at the end of this cycle at the output of block 12 disconnects the memory block 8 from the atmosphere and turns on the block 13 of the measurement time delay. After that, the inlet valve 1 is turned on, which disconnects the cavity of tire 2 from the air supply source and turns on memory block 8, connecting it via pressure sensor 6 to cavity 85. After the pressure equalization time in tire cavity 2, channel 86 and block 8, 13 generates a signal to turn on block 9. If, after a delay of time determined by the duration of transients in this block, a single discrete signal does not appear, block 15 disconnects memory block 8 from chamber 87 of handpiece 5, while in block 8 pressure is remembered in the tire 2, measured after the first cycle inflating. Then the block 15 switches the inlet valve 1 to the initial position and turns on the generator 42 of the block 12. The next pumping cycle begins, the duration of which decreases compared to the previous cycle, because in this cycle the signal stored by the block 8 is continuously summed up with the rising signal produced by the generator 42, and the sum is compared with the pressure value Pj. Therefore, the duration of the next stroke is determined by the pressure build-up time at the generator output.

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42 from filled pressure to RP level. If, after the next measurement cycle, a single discrete signal appears at the output of block 9, then block 15 prohibits the start of a new stroke, and the indicated single signal of block 9 turns on relay 14. After the specified loading time has elapsed, relay 14 turns on block 11, and block 15 turns on outlet valve 3. The tire pressure reduction stroke starts from the pressure of the flange to the working pressure. Block 11 re-switches so that the comparison element 41 of block 12 has a transfer function of the following form:

PV 2 (P, P:,) - Pi :.

5 where Py is the pressure at the output of the relay 43;

WG-linearly 1 growing pressure at the outlet of the generator 42;

PI is the set pressure corresponding to the set working pressure in the splint 2;

Re - pressure in block 8 after the n-th output stroke;

p „РЗ at the beginning of the first measure.

In addition, the block 11 supplies to the element 32 of the block 9 and to the element 40 of the block 12 a predetermined pressure P: i. Taking into account that in each measurement step, pressure P "in memory block 8 is compared with a predetermined pressure (P) in tire 2, and the duration of release in each step is determined by the increase in pressure P at the output of the five-membrane comparison element 41 to the value of pressure Pc, the duration of each subsequent exhaust stroke is similar to the intake stroke decreases. The difference in operation of the device in the output cycles is that after measurement, unit 15 turns on the exhaust valve 3, and when the pressure in unit 8 decreases, after the "th discharge stroke Pn to the value of pressure Pz in the next measurement cycle, the signal from unit 9 output through unit 15 turns on valve 4. The pressure from the air supply source through valve 4 and inlet channel 77 of tip 5 is fed to nadporshvuyu chamber 88. As a result of the difference in area of the area from chambers 87 and 88, porgnen 81 returns to its original position. In this case, the gripping element 80 is released and the pressure in the channel 87 of the tip 5 is discharged from the tire valve 2. Next, the valve 82 separates the cavities 84 and 85. When the pressure in the cavity 85 disappears through the inlet channel 75, the pressure sensor 6 turns off the element 7, i.e. the entire device for the automatic pumping of women, since the supply pressure of all the blocks and their elements is cut off. The unit elements of the device return to their original position.

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Claims (1)

DEVICE FOR AUTOMATIC TIRING OF TIRES, containing an air duct with an inlet, measuring and outlet controlled pneumatic valves connecting the tire cavity with a pressure source and the atmosphere through the tip, a device start-up element, a comparison unit, the first and second inputs of which are connected respectively to the setter and pressure sensor, the last of which is associated with a controllable exhaust valve, and ♦ a memory unit, the input of which is connected to the unit for setting the air intake and exhaust time, characterized in that, in order to expand the scope and increase the pumping capacity, it is equipped with an additional controlled pneumatic valve, a delay relay for the landing time of the tire beads on the rim, the input of which is connected to the output comparison unit, and the output is connected to the inlet measuring valve, the mode switching unit and the control signal generation unit, the first and second outputs of which are connected to the additional and exhaust stump with solenoid valves, and the third with a prohibiting input of the measurement time delay unit, while the inputs of the mode switching unit are connected respectively to the outputs of the pressure setter, memory unit and air intake and exhaust time setting unit, the control inputs of the latter of which are connected to the outputs of the mode switching unit. SU ,, „1237472 Fig 1 | "Has been