SU981855A1 - Device for sampling liquid media - Google Patents

Description

(54) DEVICE FOR SELECTING LIQUID MEDIA

1 The invention relates to u-devices for withdrawing liquid media containing fibrous suspensions from pipelines under pressure, in particular for withdrawing cooking liquor from circulation lines of a Kamur-type continuous cooking apparatus. A device for sampling fluid and fiber suspension is known. It includes a perforated balloon covered with a mesh and connected to a pulse tube; the balloon is designed as an eccentric 1. The indicated device is unsuitable for the selection of cooking liquors, since the net that is wrapped around the balloon is quickly ground with resin, lignin and other components of the cooking liquor, and the impulse tube clogs the fiber. Closest to the present invention is a well-known sampler for liquid media, comprising a housing with a nozzle for withdrawing a withdrawn liquid and nozzles for entering and leaving the circulating fluid 23. The disadvantages of the known sampler are the high flow rate of liquid at a pressure of 17 kgf / s

". and above through the hole in the hollow roller and the sampling slot at nominal cross-sections of these holes, taken from the condition that these holes are not clogged with fiber, the difficulty of compacting the hollow roller in the housing when creating the device, for selecting aggressive media with high temperature (in particular , cooking liquor from the circulation lines of the pulping machine), design complexity due to the presence and necessity of cooling the packing unit of the roller when sampling high temperature fluids. The purpose of the invention is to increase the reliability of the device by automatically cleaning the channels for fluid collection and reducing the flow rate of the liquid to be drawn. This goal is achieved by the fact that a device for sampling liquid media, comprising a housing with a nozzle for withdrawing a withdrawn liquid and nozzles for entering and exiting the tatpKynu-. The ruy1a1 liquid is equipped with a float mounted in the housing, made with spiral grooves on its lateral surface, axis, coaxially

installed with a float and made with a screw thread, and a membrane made with a central hole and installed in the upper part of the body.

. It is advisable to provide the device with an automatic pulsation valve installed between the pipe and the pipe for the inlet of the circulating fluid.

The drawing shows the device, a longitudinal section.

The device consists of a housing 1 with a nozzle 2 for draining the withdrawn liquid, a nozzle 3 for the inlet of the circulating fluid and an Attachment of an automatic pulsation valve and a nozzle, 4 for the outlet of the circulating fluid. The device is connected to the bypass line of the main pipe with circulating fluid.

Inside the housing 1 a thin membrane 5 is mounted with a central hole b. The membrane 5 separates the device case. On the flow cavity is about and a cavity for sampling the liquid network B. An automatic pulsation valve KP 7 is attached to the inlet pipe 3 of the housing, which has a converging nozzle 8 in its pipe. on the side surface.

At the upper end of the float there is fixed (or made in one piece with the float) axis 12 having two-screw cutting 13. The upper end of the axis passes through the central hole in the membrane 5, forming two channels with it to allow the fluid to pass into the selective cavity $. Float 10 is centered in housing 1 with sleeve 14 ..

The device works as follows.

When the valve 7 is open, the flow of fluid through the converging nozzle 8 is set into the conical socket 9 of the device body and pushes the float U up until it stops at the end of the sleeve 14. Due to the presence on the side surface of the float, spiral flocks 11 float under the influence of the dynamic head, the liquid comes to rotation . In this case, the main flow: the fluid exits through the outlet 4, and part of it through the channels of the screw threading the axis and the hole in the membrane goes into the selective cavity c. .

Periodic pulsation closing and opening of the automatic valve 7 creating a pulsation of the fluid flow vegies the flow cavity of the device, which leads to the oscillatory movement of the float in the longitudinal direction of the body and the body.

Thus, under the influence of the pulsating head of the fluid flow created by the automatic pulsation valve, the float 10 together with the axis 12 performs rotational-oscillatory movements in the device body.

Rotational movement of the axis creates CONDITIONS for ejection of fiber and other particles entering the channels formed by the screw thread of the axis back into the flow cavity of the device, and the oscillatory movement of the axis in the longitudinal direction promotes intensive washing of the screw thread with a fresh flow of liquid, i.e. In the rotational-oscillatory motion of the axis, self-cleaning of the axial cutting channels occurs.

 The safety device has a simple, reliable design and allows liquid to be drawn at a minimum flow rate, while blocking the holes with fiber is avoided. In addition, the device.-Allows continuous monitoring of the active alkalinity of the cooking liquor in the process of continuous pulping, which creates the condition for timely adjustment of the process.

Claims (2)

1. A device for the extraction of liquid media, mainly from pipelines of pulping equipment, containing a housing with a pipe for draining the drawn liquid and pipes for entering and leaving the circulating liquid, in order to improve the reliability of the device by automatic cleaning fluid collection channels and reducing the flow rate of the withdrawn liquid, it is provided with a float mounted in the housing, made with spiral grooves on its side surface, an axis coaxially mounted above the float and made with a screw thread, and a membrane made with a central hole and installed in the vertical part of the body 2. The device according to claim 1, in that it is equipped with an automatic pulsation plug installed between the pipeline and the nozzle for the inlet of the circulating fluid. . Sources of information taken into account in the examination 1, USSR author's certificate i 387244-, class, G 01 N 1/10, 1971. 2. USSR author's certificate 471307 cells. 6 01 N 1/10, 1972.