RU2472124C1 - SHIPBORNE INDICATING PRESSURE GAUGE MP-3Kr - Google Patents

Abstract

FIELD: instrument making.

SUBSTANCE: shipborne indicating pressure gauge comprises a cylindrical body, inside of which there is a special detachable chamber installed, which consists of a flange and a holder - base. Inside the detachable chamber a flat membrane is placed, which is exposed to measured pressure at one side and to atmospheric one - at the other side. Under action of pressure difference the membrane sags and via a transmitting pinion-sector mechanism moves the pointer installed on the pinion axis and arranged above the dial. The cylindrical body of the instrument is arranged as a whole with a square flange, in which at the inner side there is an additional chamber made and closed with a cover. The additional chamber communicates with one hole arranged in the cover, with the inner cavity of the body, and by two others - with atmosphere. The additional chamber performs functions of a filter, which eliminates ingress of moisture and dust, oil vapours, sea fog, etc. inside the instrument.

EFFECT: improved design of shipborne pressure gauges.

4 cl, 3 dwg

Description

The invention relates to instrumentation, in particular to the field of creating dial gauges showing ship and other devices, the cases of which have a cylindrical shape of various diameters with a protective glass located above the dial.

Instruments of this class are designed to measure in ship conditions the excess and vacuum pressure of air, sea water, freons 12, 22, 134a, 404a, 502, oils HF12-18, HF22-24, HS-40, HA-30, KhM-35 , alcohol, antifreeze 40 and 65, turbine oils 30 and 46, synthetic oils Mobil EAL Arctic [1].

As analogs, manometers, vacuum gauges and manovacuum meters MTPSd-100-OM2, VTPSd-100-OM2, MVTPSd-100-OM2 [2], which are designed to measure the excess pressure of liquids (diesel fuel, oil, sea water), gases, can be taken and water vapor, the temperature of which at the point of pressure extraction should not exceed 60 ° C, in an environment saturated with vapors of lubricating oil, diesel fuel and sea water. Devices can be made for pressure measurement of freons of grades 12, 13, 22, 142, 502, 134a, 404a and oxygen.

Known pressure gauges, vacuum gauges and manovacuometers showing ship MP - 100KR, VP - 100 KR and MVP - 100KR [3], which are designed to measure the excess and vacuum, constant and variable pressure of gases and liquids that do not crystallize at operating temperature, under shock conditions, vibration and tilt. A feature of this device is that it can operate at a temperature of the measured medium at the sampling point from minus 50 to plus 70 ° C, in addition, to eliminate the influence of changes in atmospheric pressure, a pressure-reducing filter is provided in the design of devices of this class.

The aim of the proposed technical solution is to improve the design of ship pressure gauges.

The technical result is achieved by the fact that in the proposed manometer showing the ship MP-3Kr (hereinafter referred to as the manometer) an additional camera is used that acts as a filter that protects from atmospheric air (moisture, dust, oil vapor, etc.) the details of the pressure gauge mechanism .

A known pressure gauge, selected as a prototype, in which a flat membrane is used to measure the pressure of aggressive liquids or viscous substances [4, p. 97, Fig. 72b]. The flat membrane is placed in a special detachable chamber under the pressure gauge body. On the one hand, the measured pressure acts on the membrane, and on the other, atmospheric pressure. Under the influence of the pressure difference, the membrane bends and through the transmission mechanism moves the gauge needle, which moves along the dial with the scale and shows the value of the measured pressure.

The flat membrane is made of a material resistant to corrosion, or it has a special protective coating. Thanks to the very simple construction of the chamber and membrane, it is easy to protect the sensitive part and other details of the mechanism from the harmful effects of an aggressive medium. The advantage of flat spring pressure gauges is their resistance to vibration.

Comparison of the claimed technical solution with the prototype made it possible to establish its criterion of "novelty." In the study of other well-known technical solutions in this field of technology was not identified and therefore they provide the technical solution matching "significant differences".

The invention is illustrated by the description of the pressure gauge showing the ship MP-3Kr, as well as the drawings (figure 1, figure 2 and figure 3). Figure 1 shows the device on the front side with a local cross-section, where 1 - the cylindrical case 1 of the device is made integral with a square flange 1a, which has four holes for mounting the device at the place of use, 2 - a dial with a scale 3, above which on the axis of the tribe of the tribo-sector mechanism 4, a pointer arrow 5 is installed, which is connected with a spiral spring 6, designed to select the backlash in the kinematics of the tribo-sector mechanism 6 and providing a stabilized position of the cutting arrow 5, above which but protective transparent organic glass 7 having a disk shape. The base holder 8, which ends with a fitting 9 for connecting to the measured pressure from the outside of the housing 1 of the device; figure 2 is a view A with a local section in figure 1, where the additional chamber 10, which is designed to exclude the influence of barometric pressure and is made on the inside of the square flange 1A and is closed by a cover 11, which is fastened with screws 12, in addition, the additional camera communicates with one hole 13, made in the cover 11, with the internal cavity of the housing 1 and two others, 14 and 14a, with the atmosphere. To prevent moisture and dust, oil vapors, sea fog, etc., the housing 1 of the device is equipped with sealing gaskets, one 15 of which is installed under the cover 11, and the other 16 - under the protective glass 7, which is fixed by an elastic ring 17; figure 3 - section aa in figure 2, where 18 is a flange, 19 is a fluoroplastic gasket, 20 is a membrane, 21 is a cushion that prevents overload pressure in the supmembrane cavity, limits the course of the membrane and prevents it from breaking, moreover, the pillow is made similar to the contour of the membrane, in addition, to prevent the action of sea water, a fluoroplastic suspension is applied to the membrane with a thin layer, 22 - center hard, 23 - stop, 24 - lever, 25 - rod, 26 - rod, 27 - feed channel the measured pressure into the cavity of the chamber 28 in which the membrane 2 is located 0, which has a protective coating, for example, of fluoroplastic, from exposure to an aggressive measured medium on the membrane. The sealing of the cavity of the chamber 28 is carried out by pressing the fluoroplastic gasket 19 by the flange 18 with the help of bolts 29 to the holder-base 8.

The pressure gauge device operates as follows (figure 1 and figure 2).

The principle of operation of the device is based on balancing the measured pressure by the forces of elastic deformation of the sensing element-membrane 20.

Under the influence of the measured pressure, the membrane 20 (FIG. 2) bends, moving the rigid center 22 on it. The movement of the rigid center 22 with the help of rods 25, 26 and the lever 24 is transmitted to the tribal sector mechanism 4, on the tube of which the pointer arrow 5 is fixed, indicating on scale 3 of dial 2 is the value of the measured pressure.

To select the backlash in the kinematics of the tribo-sector mechanism, a spiral spring 6 is used, which also ensures a stable position of the index arrow 5. The tightness of the cavity of the chamber 28 between the base holder 8 and the membrane 20 is sucked using a fluoroplastic gasket 19.

Information sources

1. Pressure gauges, pressure gauges showing ship MP-3Kr, MVP - 3Kr. Operation manual 5ShO.283.254 RE. TU 25.02-71.2004-76. Tomsk, OJSC "Manotom".

2. Ship pressure gauges, vacuum gauges, manovacuometers MTPSd-100-02, VTPSd-100-SM2, MVTPSd-100-OM2. TU 02.25.1946-76. http://nponroma.ru/katalog/ribori/.

3. Manometers, Vacuum gauges and Manovacuum meters showing ship MP-100KR, VP-100KR and MVP-KR. Operation manual 5ShO.283.429 OM. TU 4212-055-0022590-2007. Tomsk, OJSC "Manotom".

4. V.K. Solovtsov. "Instrumentation". M .: 1966

Claims (4)

1. A manometer showing a ship containing a cylindrical body, inside which a special detachable chamber is installed, which consists of a flange and a base holder, which ends with a fitting for connecting to the measured pressure from the outside of the device’s body, and a flat membrane is placed inside the detachable chamber, on which on the one hand, the measured pressure acts, and on the other, atmospheric, and under the influence of the pressure difference, the membrane bends and moves the pointer through the transfer tribo-sector mechanism a distinctive arrow, which is mounted on the axis of the tribe and is located above the dial, and a protective transparent organic glass having a disk shape and located above the dial with a scale and an arrow, characterized in that the cylindrical case of the device is made integral with a square flange in which the inside is made additional chamber and is closed by a lid, which is fastened with screws, and the additional chamber communicates with one hole made in the lid, with the internal cavity of the housing, and two others with atmosphere, in addition, the additional chamber acts as a filter, which eliminates moisture and dust, oil vapors, sea fog, etc. from entering the device, and the device is also equipped with sealing gaskets, one of which is installed under the cover of the additional camera, and the other under the protective glass, which is fixed by an elastic ring. 2. The manometer according to claim 1, characterized in that in order to protect against the action of sea water, a fluoroplastic suspension is applied to the membrane with a thin layer. 3. The pressure gauge according to claim 1, characterized in that in order to prevent overload pressure in the supmembrane cavity there is a solid cushion made similar to the contour of the membrane, in addition, a solid cushion limits the course of the membrane and prevents it from breaking. 4. The manometer according to claim 1, characterized in that the sealing of the chamber cavity is carried out by pressing the fluoroplastic gasket with a flange using bolts to the base holder.

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