Pressure reducing valve
(57) Abstract:Usage: in valve. The inventive inlet of the housing is blocked by the shut-off valve, located on the spring-loaded plunger to which pressure disks attached elastic membrane. The outer edge of the membrane is rigidly fixed between the housing ring and clamp with the formation of three cavities. The space between the two diaphragms is hermetically isolated from namebrands and podobrannoj cavities. Podobrannaya cavity aligned with the cavity of the outlet pipe. Membranes made with different effective area. The membrane with the smaller area is on the side of the combined cavity. The plunger is made canal linking the combined cavity with namebrands. 1 Il. The invention relates to a valve and can be used to reduce gas pressure taken from a source of compressed gas through pipeline high pressure and to maintain reduced pressure in the line low pressure constant regardless of the pressure gas in the high-pressure line.Known pressure reducing valve, comprising a housing, between the inlet and outlet channels which traverse the saddle, and the shutter is made of elastic material associated with the sensing element having the configuration node and connected to the output channel, and the bolt and the saddle is made with a conical surfaces /1/.The disadvantages of this pressure reducing valve should be attributed to the strong pressure spring, especially when it is necessary to provide a sufficiently high level low pressure gas, which leads to an increase of dimensions and, respectively, and consumption of materials for the manufacture of pressure reducing valve. The presence of the bellows also complicates and increases the cost of construction.The closest to the technical nature of the present device is a pressure reducing valve, comprising a housing with an outlet pipe and the outlet, covered with a shut-off valve, located on the spring-loaded plunger, which by means of plates attached to two elastic membrane, the outer edge of which is rigidly fixed between the housing ring and clamp with the formation of three cavities and the space between the two diaphragms is hermetically isolated from namebrands and podobrannoj cavities /2/.This design is inherent in the above-mentioned disadvantages. The task of sobriety and life.This technical result is achieved by the fact that in the known pressure reducing valve podobrannaya cavity aligned with the cavity of the outlet pipe, membranes made with different effective area, and the membrane with a smaller effective area is on the side of the combined cavity and the plunger is made canal linking the joint cavity with namebrands cavity.The invention is illustrated in the drawing.In case 1, the pressure reducing valve is coaxially plunger 2, which is fixed to the valve 3. The plunger 2 by means of plates 4 and 5 attached membrane 6 and 7. The outer edges of the membranes are clamped between the body 1, the ring 8 and the clamp 9, which rests against the end of the pressing spring 10, which transmits the spring force to the plunger 2 through the nut 11, which provides the necessary force of the compression pressure spring.Thus, between the membranes formed a closed cavity 12 which is hermetically isolated from the cavities 13, 14, connected by a channel 15 in the plunger 2. The outer diameter surface of the pressure disk 4 and the pusher 2, adjacent to the diaphragm 6, is less than the outer diameters of the surfaces of the plates 4 and 5, adjacent to member the diameters of the outer ring 8 and the clamp 9, adjacent to the membrane 7.The device operates as follows.In the initial position the location of all the nodes corresponds to the drawing. When applying gas from a source of high pressure to the input device, the gas enters the cavity 14 and then to the exit. At the same time through the channel 15, made in the pusher 2, the gas fills the cavity 13, the pressure of the gas in the cavities 13 and 14 equally, resulting from the difference between the effective areas of the diaphragms 6 and 7, you receive the resultant pressure forces acting on the above-mentioned membrane 6 and 7, which is applied to the plunger in the direction to the input device /seat/.When the preset pressure level at the inlet defined by the initial preload of the spring 10, by a nut 11 valve 3 that is associated with the plunger 2, overlaps the input device /seat/. Pressure reducing valve for gas compression, comprising a housing with an outlet pipe and the inlet is blocked by a cutter located on the spring-loaded plunger, which by means of plates attached to two elastic membrane, the outer edge of which is rigidly fixed between the housing ring and clamp with the formation of three cavities, and the floor, what podobrannaya cavity aligned with the cavity of the outlet pipe, membranes made with different effective area, and the membrane with a smaller effective area is on the side of the combined cavity and the plunger is made canal linking the combined cavity with namebrands cavity.
FIELD: oil producing industry.
SUBSTANCE: invention relates to pipe fittings, namely, to devices with rotary shutoff member and it can be used for automatic closing of high-pressure pipes at emergency pressure rise or drop in wells of oil and condensate fields. Proposed cutoff device contains housing and rotary shutoff member installed in housing. Said member is made in form of two rotary gates, one placed on the other. One of gates is provided with discharge hole, and other gate is blind. It covers hole is discharge gate. Device is furnished with lock holding shutoff member in open position, and sensitive element. The latter is made in form of spring-loaded rod connected with lock. Lock holds discharge rotary gate with hole in open position. Blind rotary gate is provided with stop being installed for engagement with sensitive element rod through stop.
EFFECT: simplified design of cutoff device, provision of reliable operation at pressure drop or rise and overlapping of high-pressure pipeline.