SU516939A1 - Device for taking samples from pressure or vacuum apparatus - Google Patents

Description

one

The invention relates to a sampling technique for analyzes, in particular, devices for sampling liquid products from pressure or vacuum apparatus, and can be used in chemical, food, pharmaceutical and other industries.

A sampling device is known comprising a housing, a sample receiving container, a lock chamber, a sealing device with a throat, and an intake cup with a transfer mechanism.

The disadvantage of such a device is that repeated use of one intake beaker with transfusion of the selected sample into the receptacle for receiving the sample distorts the reliability of the sample due to the fact that the intake beaker cannot be completely removed from the previous sample without manual washing.

In order to ensure the reliability of the sampled sample, in the sampling beaker of the proposed device, flushing windows are made;

coaxially to the neck of the sealing device.

The sealing device can be made in the form of a rotary cap with a lock, the stripping device is equipped with a lock.

The drawing shows the proposed device, a longitudinal section.

The device includes a sluice chamber 1 having a side flap 2 and with a neck 3 fixed on the lid of the reaction apparatus (the lid is not shown). The throat is equipped with a folding hinged pry 4, which is connected through the lever system 5 and the rollers 6 to the pneumatic cylinder 7. A fixing device 8 is mounted on the cover to set up the cuvette 9 for testing.

On the chamber 1, coaxially with the neck 3, is fixed a post 10 of the transfer mechanism 11, the driven shchestren 12 of which engages with the teeth made on the outer surface of the rod 13. In the internal boring of this pole there is a pin 14, on the lower end of which is fixed a valve 15 locking the intake the cup 16, the swing stop 17 and the lower stop 18. The inner bore of the trouser and 13 are sealed with a seal 19. The locking lever 2O with a spring 21 is fixed to the upper end of the rod 13. On the side wall of the casing 22 there is a stand 23 with a tilting arm with an emphasis 24. In fittings 25, 26 for feeding and a spout 27 for discharging compressed air are provided. A pneumatic cylinder 7 is provided with a brush 28 with a stop 29 and limit switches 30 and 31. A bar cleaner 34 is installed on the rod 13 by means of a spring retainer 2 and a flange 33. At the bottom of the chamber 1 near the neck 3 there are spring retainers 35 for fastening the device 34 to the neck . In the side walls of the glass 16, windows 36 are provided for flushing. The rod 14 is provided with a spring 37 for closing the valve 15. A shutter 38 mounted on the bellows 39 is placed in the device 34. The rod 13 cooperates with limit switches 40 and 41, the cover 22 is closed by a cover 42 The sampling device operates as follows. When the flap 4 is closed, the flap 2 is opened and the cuvette 9 is installed in the device 8, after which the flap is closed. The sampling device then operates automatically. Through the electropneumatic valve 1 (not shown in the drawing) connected to one of the side ports of the nozzle 25, compressed air or inert gas is supplied to the chamber 1 (in the case of apparatus operation under excessive pressure) or vacuum is created in it (in the case of apparatus operation under vaku mind). When the pressure (vacuum) in chamber 1 becomes equal to the pressure in the apparatus, an electric contact pressure gauge (not shown in the drawing), which is connected to the upper nozzle of junction 25j, gives a signal to supply compressed air to the Zshevmödshndr through fitting 26; At the same time, the cylinder 7 rod raises and the system 5. opens the lid. The rod stop 28 reaches the upper position Kpaituero, closes BbiKasoHaTejTiJ ZO, which turns on the electric motor (not shown) of the mechanism 11. Gear 12 rotates and the rod 13 is lowered. The device 34, which is held by retainer 32 on the lower flange of the rod 13, passes through the neck 3 and rests against it with the flange 33. The retainers 35 grab the projections of the flange 33 and fix the latter on the neck 3. When the lower rod 13 is further lowered, the retainers 32 release the lower the flange of the rod 13 and the cup 16 is immersed in the test liquid. During immersion, the beaker is rinsed with liquid flowing through the annular gap between the wall of the glass and the valve 15 and flowing out through the windows 36 in the side walls of the glass, as a result of which the glass is sufficiently cleaned from the remnants of the previous sample. To improve cleaning, the beaker is made of fluoroplast-4, a material with low adhesive properties. When the bar 13 is immersed at a sampling depth adjusted by the position of the stand 23 and the stop 24, the lever 20 rests on the stop 24, rotates and releases the stop 17. The rod 14 is pressed up by the action of the spring 37 and the valve 15 locks the sample in the glass 16. Subsequently lowering the rod 13 closes the switch 41, which switches the electric motor of the mechanism 11 to lift the rod. The obturator 38 of the device 34, held by retainer 35 on the neck 3, compresses the rod 13 and cleans the adhered product from it. The lever 20, lift the stop 24, passes upwards. When the lower flange of the rod 13 rests on the device 34, the latches 32 snap into place and the latches 35 expand. The device 34 together with the rod 13 starts to move upward until closed by the flange 33 of the switch 41, which stops the electric motor of the mechanism 11 and commands the air supply to the pneumatic cylinder 7 through the fitting 27 and to the air discharge through the fitting 26, the rod 28 lowers and through the system 5 lowers the cover 4, sealing the neck 3. Then this rod closes the end of the switch 31, which turns on the motor of the mechanism 11 for lifting the rod 13 to the edge its upper position and gives a command to open the valve for releasing pressure (vacuum) in the chamber 1, connected to the second lateral hole 25 fitting (not shown). When lifting the bar 13, the bellows 39 of the device 34 is slightly compressed, and the rod 14 rests on the lid 42 of the casing 22 and the stop 17 drops over the lever 20. At the same time, the stop 18 compresses the spring 37, and the valve 15 opens the cup 16 and the sampled sample is drained into the cuvette 9. After the pressure (vacuum) is released in chamber 1, open the flap 2, remove the cuvette 9 with the sample, install the new cuvette and close the flap. The sampling device is prepared for the next sample.

Thus, the proposed device provides for sampling from devices operating under pressure or under vacuum, thereby eliminating the spillage of hot or corrosive toxic products, ensuring that the intake cup is cleaned before taking the next sample, eliminating residues from previous samples in the sampled sample, thus achieving high reliability samples.

Claims (3)

1. A device for sampling from apparatus-16 products working under pressure or under vacuum, comprising a housing, a container for receiving a sample, a slug chamber, a sealing device with a throat and a suction cup with a transfer mechanism, characterized in that, in order to ensure the reliability of the sampled sample, flushing windows are made in the suction cup, and the moving mechanism is equipped with a movable wiper that is placed coaxially with the sealer . 2. Device pop. 1, characterized in that the sealing device is in the form of a rotatable lid with a retainer. 3. Device pop. 1, characterized in that the stripping device is provided with a lock.