SU1583490A1 - Device for measuring moisture content of powdered material moving in a stream - Google Patents

Abstract

The invention relates to automatic devices for measuring the moisture content of dispersed materials, such as raw cotton, cotton seeds and other cotton materials, transported in pipelines. The aim of the invention is to improve the accuracy of moisture measurement by stabilizing the density of the material. In the output chamber of the device, there is a plug that reciprocates by means of a rod with a support, the other end of which is connected to a screw pair and a stepper motor, and the transducer forming nozzle is made in the form of two hemispheres in which permanent magnets are mounted on the outer surface of the inner wall , having the same magnetic coupling with electromagnets mounted on the outer wall, on the inner side of which the seal sensors are fixed. A controlled pulse generator, OR elements, prohibition elements, triggers, a time delay element, and a pulse distribution circuit are introduced into the device’s actuator control circuit. 2 hp ff, 3 ill.

Description

The invention relates to automatic devices for measuring the moisture content of dispersed materials, such as raw cotton, cotton seeds, meal cake, etc., transported in pipelines.

The aim of the invention is to improve the accuracy of moisture measurement by stabilizing the compaction of the mother. ala

Fig. 1 is a schematic diagram of the device; figure 2 - section aa in figure 1;. on fig.Z - forming pipe; 4 shows an actuator control circuit diagram.

The device (Fig. 1) contains a charging hopper 1 with successively located reflector 2, feeding rollers 3 and brushes 4, feeding chamber 5 with a pressure screw 6, electric motor 7, kinematically connected with motion transmission mechanism 8, stepper motor 9, kinematically connected by means of a helical gear 10 and a rod 11 with a support 12 with a fork 13, which is a means for changing the consumption of material

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the pas forming the nozzle 14, the exit chamber 15 with the exit nozzle 16, the return chamber 17 E by the unloading screw 18, the output of which is connected to the pipeline 19, the sensors 20 and 21 of the limiting movement of the rod 11, the sensors 22 of the seal, the converters 23 of the humidity, an actuator control unit 24, an AND 25 element and a moisture meter 26.

The motor 7 and the first input of the actuator control unit 24 are connected to a start element (not shown). „Sensors 20 and

21 limiting movement of the pants-. 11 and, respectively, the plug 13, as well as the output of the AND element 25 are connected respectively to the second, third and fourth inputs of the actuator control unit 24, the first output of which is connected to the stepper motor 9. The first, second and third outputs of the motion transmission mechanism 8 kinematically connected, respectively, with feed rollers 3, pressure screw 6 and discharge screw 18. Seal sensors 22 are connected to the element inputs I 25, and moisture converters 23 are connected to the first and second inputs of the moisture meter 26, the third in d is connected to the second output of the control unit 24 by the actuators. Humidity transducers 23 and moisture meter 26 can be made with ultrahigh-frequency high-frequency capacitive, radioisotope, etc. The shaping nozzle 14 is made of a material that does not affect the moisture measurement in accordance with the measurement method used. The forming nozzle .14 (FIG. 3) has the shape of a hemisphere and guides 27 and 28 with springs 29 and 30 installed in the outer wall 31, the inner wall 32 with a protective film 33, permanent magnets 34 and electromagnets 35 installed coaxially respectively, on the outer surface of the inner wall 32 and the outer wall 31 of the forming nozzle 14, an adjustable current stabilizer 36 with a current meter 37, to the output of which electromagnets 35 are connected, and sealing sensors 22 mounted on the inner surface of the outer wall 31, and the protective film 3 3 is located on the inner surface

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This inner wall 32, which is installed with the possibility of radial movement along the guides 27 and 28 with springs 29 and 30.

The actuator control unit 24 (Fig. 4) has a pulse distribution circuit 38, prohibition elements 39-41, OR elements 42-45g triggers 46-48, a time delay element 49 and a waiting pulse generator 50, with the first inputs of the element pulse distribution circuit 38 OR 43-45 are combined and are the first input of the executive control unit 24, the second input of the OR element 43 and the combined first input of the OR 42 element and the zero input of the trigger 46 are respectively the second and third inputs of the control unit 24 mechanisms, the zero output of the trigger 46 is associated with the trigger input of the waiting pulse generator 50, the output of which is connected to the inputs of prohibition elements 39-40, the zero and single inputs of the trigger 47 are connected respectively to the outputs of the OR elements 42 and 43, and the zero and single outputs of the trigger 47 are connected respectively to the inhibit inputs of the prohibition elements 39 and 40, the outputs of which are connected respectively to the second and third inputs of the pulse distribution circuit 38, while the input of the prohibition element 4 1 is connected to the single output of the trigger 48, prohibiting The input is connected to the zero output of trigger 46, and the output is connected to the second input of the element OR 44, the output of which is connected to the single input of the trigger 46, the zero input of the trigger 48 and the output of the pulse distribution circuit 38 are respectively the fourth input and the first output of the control unit 24 actuators, the second input of which is the zero output of the trigger 48, associated with the second input of the OR 42 element and through the time delay element 49 with the second input of the OR 45 element, the output of which is connected to the single input of the trigger ra 48.

 The device works as follows.

After the signal from the start element (not shown) is applied, the electric motor 7 is turned on and through the mechanism 8 of the motion transmission drives the feed rollers 3, the pressure 6 and the discharge 18 screws. The dispersed material transported through conduit 19 is partially reflected by the reflector 2 and is fed to the feed hopper 1.

The feed rollers 3 together with the brushes 4 create a certain seal in the feed hopper 1 and, thus, ensure a uniform flow of the dispersed material into the feeding chamber 5 by the pressure screw 6.

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The material falling into the zone of the forming pulse distribution, as a result of the pipe 14, at the middle or top of which the stepping motor is turned on, the extreme position of the plug 13 in the cavity of the output chamber 15 begins to accumulate and compact. This gradually increases the pressure force on the inner wall 32 of the forming pipe 14, covered with a protective film 33, resulting in movement of the inner wall 32 along the guides 27 and 28 with springs 29 and 30 to the outer wall 31. Moreover, this movement is associated with overcoming resistance force due to the mutual action of like poles of permanent magnets 34 and electromagnets 35. The magnitude of the resistance force is determined by the value of a given current in electromagnets 35 using a current stabilizer 36 and measure bodies 37. At a certain pressure, corresponding to the installation density of the dispersed material in the forming pipe 14, the inner wall 32 acts on the sensors

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thirty

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22 seals mounted on the inner surface of the outer wall 31.

The signal from the compaction sensors 22 is fed through element 25 to the fourth input of the actuator control unit 24, where a command is formed for measuring with the moisture meter 26 and for the corresponding activation of the stepper motor 9 acting through the screw gear 10, the rod 11 with support 12 on the fork 13, which takes the lowest position while moving. In this case, the upper sensor 20 limit movement. a signal is generated for reversing, which is fed to the second input of the actuator control unit 24 and to the second input

9 and the fork 13 is stirred upwards. The material under study accumulates in the forming port 14 and, with a sufficient rotational speed of the pressure auger 6 and the material being fed by the feed rollers 3, the required level of installation density can be reached before the arrival of the plug 13 to the upper extreme position. In this case, after the activation of the sealing sensors 22, the signal through the element I25 goes to the fourth input of the actuator control unit 24 and changes the state of the trigger 48, previously set by the device start command, or the time delay element 49 during operation through the OR element 45. As a result, from the second output of the actuator control unit 24 to the third input of the moisture meter 26, which, for example, with transmitting and receiving antennas mounted on the forming nozzle 14, AET electromagnetic energy test material. Since there is a certain correlation relationship between the dielectric parameters of the material and the amplitude or phase of the wave passing through it, the output signal from the moisture meter is the result in percentage moisture content, in relative units, etc.

If the set density is not reached. In the average upward position of the plug 13, then at the extreme upper position causes the lower displacement transducer 21 to turn on, the signal from which goes to the third input of the actuator control unit 24, which leads to a change

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element OR 43 (fig.Z). The trigger 47 is switched and, on the inhibit input of the inhibit element 39, a single signal level is established. For that

The material from the forming nozzle 14 moves into the output chamber 15 and through the nozzle 16 enters the return screw 17 into the return chamber 17 with a discharge screw 18. After switching the trigger 47, the pulses from the output of the waiting generator 50 pulses through the prohibition element 40 to the second input block 38

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pulse distribution, as a result of which the stepper motor is turned on

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9 and the fork 13 is stirred upwards. The material under study accumulates in the forming port 14 and, with a sufficient rotational speed of the pressure auger 6 and the material being fed by the feed rollers 3, the required level of installation density can be reached before the arrival of the plug 13 to the upper extreme position. In this case, after the activation of the sealing sensors 22, the signal through the element I25 goes to the fourth input of the actuator control unit 24 and changes the state of the trigger 48, previously set by the device start command, or the time delay element 49 during operation through the OR element 45. As a result, from the second output of the actuator control unit 24 to the third input of the moisture meter 26, which, for example, with transmitting and receiving antennas mounted on the forming nozzle 14, AET electromagnetic energy test material. Since there is a certain correlation relationship between the dielectric parameters of the material and the amplitude or phase of the wave passing through it, the output signal from the moisture meter is the result in percentage moisture content, in relative units, etc.

If the set density is not achieved. In the average upward position of the plug 13, then at the extreme upper position causes the lower displacement sensor 21 to turn on, the signal from which goes to the third input of the actuator control unit 24, which leads to a change

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The state of the trigger 47 through the OR element 43 and the state of the trigger 46. In this case, a zero level is applied to the trigger input of the waiting generator 50 pulses and its operation stops. When the required compaction of the controlled material is reached in the forming pipe 14 by a signal from the fourth input of the actuator control unit 24, the state of the trigger 48 is changed, which also leads to the inclusion of the moisture meter 26.

At the same time, through the time delay element 49 and the OR 45 element with a time delay, the state of the trigger 48 changes and the prohibition element 41 and the OR element 44 change the state of the trigger 46, as a result of which the waiting pulse generator 50 is turned on.

The plug 13 moves down to its lowest position, and the material from the forming nozzle 14 is pushed into the outlet chamber 15 and through the nozzle 16 further into the discharge chamber 17. The device is subsequently repeated.

Claims (2)

1. A device for measuring the humidity of a dispersed material moving in a flow5 transported in a pipeline, containing sequentially placed a feed hopper connected to the pipeline with a reflector, feed rollers and brushes, a feeding chamber with a pressure screw, forming a side with humidity converters, an output chamber with an output a nozzle and a return chamber with a discharge screw, the output of which is connected to the pipeline, as well as a moisture meter, to the first and second inputs of which is connected moisture converters, a start element connected to the first input of the actuator control unit and the motor input, the output of which is kinematically connected with the MOTION transfer mechanism to the feed rollers, discharge and unloading augers, characterized in that with a chain of increasing the accuracy of measurement by stabilizing the seal material ,, it is stocked sensors of material sealing in the forming pipe, element I and means for changing the material consumption with limit movement sensors located in the output chamber and kinematically connected with the actuator, and the limit movement sensors are connected to the second and third inputs of the control unit, respectively; Both are connected to the fourth input of the control unit, the first and second 5 outputs of which are connected respectively to the input of the actuator and the third input will measure the bodies of humidity. 2. The device according to claim 1, about tl and 0 is often due to the fact that the forming tube has the shape of a hemisphere and is provided with an inner wall with a protective film located on its inner surface coaxially spaced on the outer surface of the inner wall and the outer wall of the forming tube, respectively permanent magnets and electromagnets, guides with springs, and 0 is also an adjustable current stabilizer with a current meter, the seal sensors are located on the inner surface of the outer wall, electromagnets are connected to t output of the adjustable stabilizer, the inner wall is mounted with the possibility of radial movement along the guides relative to the outer wall Q3. Device on PP. 1 and 2, that the control unit of the actuating mechanism contains a pulse distribution circuit, prohibition elements, OR elements, triggers, a time delay element, and a waiting pulse generator, the first inputs of the first, second, and third pulse distribution circuits OR are combined and are the first input of the control unit, the second input of the first element OR and the combined first input of the fourth element OR and the zero input of the first trigger are respectively the second and third inputs of the control unit. laziness, the first latch output is coupled with the triggering input of monostable pulse generator, whose output is connected to the inputs five R To start item 20 Fi 1 Fig 2 J7 FIG. five