SU903648A1 - Apparatus for discharging air from hydraulic system - Google Patents

Description

(54) DEVICE FOR EXTING AIR FROM HYDRAULIC SYSTEMS

The invention relates to devices for discharging air from a hot water system, for example, from water heating systems.

A device for venting air is known, which contains a valve that interacts with the saddle and is controlled by a float actuator 1.

The drawback of the device is its complexity and reliability in operation due to the presence of moving and interacting parts in the vapor-air mixture and exposure to corrosion.

The closest in technical essence to the invention is a device for venting air, comprising a housing in which a closure member is arranged, made in the form of a canvas sheet 2 located between the flanges.

Although the known device does not have moving parts and matching parts, it is also unreliable in operation at pressures and temperatures common in modern heating systems.

The purpose of the invention. is to increase the reliability of the device.

This goal is achieved by the fact that in a known device for venting air from hydraulic systems, comprising a housing in which a shut-off member is placed, the latter is made in the form of a plug made of a hydrophilic material with a capillary-porous structure and fitted with wicks, and in the housing

10 perforated washers, between which there is a cork.

Moreover, the locking element is made of the mineral montmorillonite.

In addition, it is placed in an elastic casing made of a hygroscopic material.

In this case, the cork is equipped with a rod, the end of which is fixed in perforated washers.

20

In addition, in order to control the response time, the perforated washers are installed with the possibility of adjusting the distance between them.

, FIG. 1 shows the device 25 in the absence of an airlock in the hydraulic system, a section; in fig. 2 the same, at the time of release of the airlock from the hydraulic system.

Claims (5)

The device includes a one hundred to one air duster box of a water heating system (not shown), case 2 with threaded perforated washers 3 located in it, between which there is a stop valve 4 in the form of a stopper. A rod 5 is located in the middle of the locking member 4, the ends of which exit from the locking member 4 and are fixed in one of the central holes of the perforated washers 3. The locking member 4 is placed in an elastic casing 6 which is made of a hygroscopic material. In addition, the locking member 4 is provided with wicks 7 and 8. Wicks 7 are also made of hygroscopic material, are located in the zone of formation of the airlock A. Wicks 8 are combined with wicks 7 and also go beyond the limits of the locking member 4, The ends are located above the upper perforated washer 3. In the absence of an airlock in zone A, the beds of wicks 7 are placed in water 9. The device operates as follows. When the hydraulic system is completely filled, i.e., in the absence of an airlock, the wicks 7 are in the water 9. Water 9 penetrates the capillaries of the wick 7 and under the action of capillary pressure rises up and penetrates into the locking member 4. The locking member 4 due to Because osmotic pressure expands, since it is made of a hydrophilic material with a capillary-porous structure, the liquid diffuses into the gaps between the structural elements, interacts with them — pushes them apart and stretches them. The so-called process of swelling occurs, and the locking organ 4 significantly increases its volume, which leads to its jamming between the protruding parts of the body 2 with perforation washers 3 and sealing the stand 1. If the organ 4 is made of the montmorillonite mineral, wetting increases its volume by more than two times, while the surrounding elastic casing b is stretched and also pressurizes one hundred to one. In case of a sharp decrease in pressure in the hydraulic system, gas (air) in d bubbles, or air penetration from the atmosphere — an airbag is formed in the upper part of a hundred to 1 in zone A. The air cushion displaces the water 9, In this case, the ends of the wicks 7 do not have direct contact with the liquid and lose their moisture. However, the main part of the moisture from the material of the closure membrane 4 evaporates into the atmosphere from the surface of the elastic casing b and the wicks 8 through the holes of the upper expansion washer 3. As a result of the loss of moisture, the material of the closure body 4 reduces its size and between it and the housing 2 air escapes from the air blockage. As the air escapes, the cavity of the air blockage is again occupied by water 9, which wets the ends of the wicks 7, and through their capillaries enters the locking organ 4, the latter again increases its volume and seals it hundred to 1. The device in the specified cycle operates in an automatic and self-regulating mode . The water level 9 is constantly held at the lower ends of the wicks 7 and undergoes slight fluctuations caused by a periodic decrease and increase in the volume of the locking member 4. When the entire hydraulic system is initially filled with water, the locking organ 4 is additionally wetted through the upper perforation washer 3, and the air is released through a special dismantled plug (not shown), which can be located on the stand 1. When the locking organ 4 is breathing, due to the rod 5 a uniform annular gap is formed between the locking organ 4 and the body Catfish 2. The rod 5 centers the locking member 4 and does not allow it to move in one direction or another, which prevents the locking member 4 from sticking to the housing 2. To adjust the response time of the device, the perforated washers 3 are pulled together or pushed together. When the washers 3 come together, the valve is deformed, the organ 4 is deformed, and when it dries, it will take a little longer to have an annular gap between it and the housing 2. When pulling the puck 3 apart, the annular gap between the locking member 4 and the body 3 is formed in a shorter period of time. The technical and economic efficiency of the device lies in the fact that it operates reliably at all temperatures and pressures encountered in hydraulic systems. Claim 1. A device for venting air from hydraulic systems, comprising a housing, is provided with a shut-off member, characterized in that, in order to increase the reliability of the device, the shut-off member is made in the form of a stopper made of a hydrophilic material with a capillary-porous structure and fitted with a wick, and in the case there are perforated washers, between which there is a pipe. 2. A device according to claim 1, characterized in that the locking member is made of montmorillonite. 3. The device according to claim 1, characterized in that the closure body is placed in an elastic casing, a full-weight, air-absorbing material. 4. The device according to claim 1, characterized in that the shut-off opiaH is equipped with a rod, the ends of which are fixed in perforated washers. . 5. The device according to claim 1, 1 and 2, so that, in order to control the response time, the perforated washers are installed with the possibility of adjusting the distance between them. The sources are taken into account in the examination 1. Author's certificate of the USSR 586292, cl. F 16 K 24/02, 1975. 2. USSR author's certificate 92059, cl. F 16 K 24/00, 1950. fug. f fug. g