REDUCING UNIT

Abstract

The utility model relates to the field of pressure regulation in engineering systems. The technical result is increased reliability, simplified adjustment, and adaptability to various flow ranges. The technical result is achieved in that the pressure-reducing unit comprises a housing with inlet and outlet pipes, in which a pressure-reducing valve is installed, configured with a movable shut-off element, characterized in that it contains inlet and outlet manifolds connected via a fluid medium to the corresponding pipes, and a main line with a series-connected pressure-reducing and check valves and a bypass line with a series-connected gate valve and check valve are connected between the manifolds. 3 clauses, 2 figs.

Description

[0001] This utility model is designed to reduce the pressure of the incoming medium to the values ​​required by the consumer. The valve's resistance at any given moment is proportional to the difference between the variable inlet pressure and the constant (reduced) outlet pressure.

[0002] The closest to the claimed technical solution is the “GAS PRESSURE REGULATOR” RU 2721146 [1], which contains gas inlet and outlet channels, a housing inside which a control piston and one piston movement control chamber are located, communicating with the command pressure system, a pilot pressure regulator with a reduction chamber, communicating at the inlet with the piston control chamber and the gas inlet channel and with the outlet pipeline at the outlet.

[0003] The disadvantage of the known solution is the lack of an integrated consumer protection system against excess pressure in static mode, which leads to a decrease in reliability.

[0004] The technical result is increased reliability, simplified setup, adaptability to various flow ranges (not exceeding the flow rate of the pressure-reducing valve).

[0005] The technical result is achieved in that the pressure-reducing unit, comprising a housing with inlet and outlet pipes, in which a pressure-reducing valve is installed, configured with the possibility of moving the shut-off element, is characterized in that it contains inlet and outlet manifolds connected via a fluid medium to the corresponding pipes, between the manifolds a main line is connected with at least one pressure-reducing and check valve connected in series, and a bypass line with a gate valve and a check valve connected in series (via a fluid medium).

[0006] Implementation

[0007] Fig. 1 shows a pressure reducing unit with a main line, Fig. 2 shows a pressure reducing unit with several working lines, where:

[0008] 1 - pressure reducing valve;

[0009] 2 - check valve;

[0010] 3 - relief valve;

[0011] 4 - output pressure gauge;

[0012] 5 - bypass line valve;

[0013] 6 - main line valve;

[0014] 7 - bypass line;

[0015] 8 - trunk line;

[0016] 9 - input manifold;

[0017] 10 - output manifold;

[0018] 11 - input pressure gauge;

[0019] 12 - input;

[0020] 13 - exit;

[0021] 14 - working line;

[0022] 15 - bypass line.

[0023] The device operates as follows:

[0024] Pressure-reducing valve 1 is built into main line 8 in series with main line gate valve 6 and check valve 2. Inlet 12 is connected to inlet manifold 9, which in turn is connected to main line 8 and bypass line 7. Outlet 13 is connected to outlet manifold 10, to which the bypass and main lines are connected. In addition to bypass line gate valve 5, a relief valve 3 is built into the bypass line. An outlet pressure gauge 4 is also built into the bypass line between the relief valve and the gate valve. Inlet pressure gauge 11 is located on the bypass line between the inlet manifold and the gate valve.

[0025] It is possible to implement a device with a main line 8, into which several pressure reducing valves 1 are built in.

[0026] The pressure regulating element is a piston-type pressure reducing valve.

[0027] The pressure-reducing valve is a fully automatic device for compensating for pulsating fluctuations in hydraulic lines. The operating principle of the pressure-reducing valve is that the outlet pressure can be regulated to a preset value using a piston. A limiting valve in the pressure-reducing valve controls the piston's response speed to pressure changes. When the limiting valve is in a nearly closed position, the reduced pressure is within the optimal range, and the piston opens quickly but closes slowly. The outlet pressure remains constant, regardless of whether water is incoming or not. Pressure reduction is achieved by regulating the flow rate using a throttling mechanism. This allows the pressure-reducing valve to be in various positions (from closed to fully open) at any time (depending on the pressure and flow rate).

[0028] The device may consist of several working lines 14 with a pressure-reducing valve 1 and one bypass line 15 (Fig. 2). In the normal state, water is supplied to the consumer through one of the working lines 14, while the other line is in reserve. The bypass line 15 exists in case of failure of the working lines and to supply an increased amount of water if necessary. The device may be implemented with working lines 14 consisting of several pressure-reducing valves 1.

[0029] Below is a description of the influence of each essential feature on achieving the technical result, which is to increase reliability, simplify setup and ensure adaptability to high flow rates.

[0030] 1. Availability of inlet and outlet manifolds

[0031] Collectors allow the flow of a medium to be distributed between multiple lines (main and bypass). This ensures the unit's adaptability to high flow rates, as the system can pass large volumes of medium through parallel branches.

[0032] 2. The presence of a main line with a series-connected pressure-reducing and check valves

[0033] The pressure-reducing valve automatically reduces and maintains pressure at a set level. Its series connection with a check valve prevents backflow of fluid from the outlet manifold toward the pressure-reducing valve. This protects the equipment from water hammer and increases system reliability.

[0034] 3. Presence of a bypass line

[0035] A bypass line allows flow to bypass the main pressure-reducing valve. This is critical to ensuring continuous operation during maintenance or repair of the main line without interrupting the flow of medium to the consumer, which directly impacts system reliability.

[0036] 4. Series connection in the bypass line of the gate valve and the relief valve (protective system)

[0037] The gate valve allows you to manually regulate or shut off the flow through the bypass. The relief valve relieves excess pressure, preventing emergency situations due to overpressure in the network, significantly increasing reliability.

[0038] 5. Installation of pressure gauges (inlet and outlet) with valves

[0039] The presence of pressure gauges provides visual monitoring of the pressure at the inlet and outlet of the unit. This simplifies setting the pressure-reducing valve to the required parameters and allows for the prompt diagnosis of system malfunctions (such as clogged or faulty pistons), ensuring adaptability to the specific needs of the user.

[0040] 6. Main line gate valve before the pressure reducing valve

[0041] This feature allows the pressure-reducing valve to be completely isolated from the inlet pressure for safe removal, cleaning, or adjustment. This simplifies maintenance and allows for quick bypass operation, maintaining the functionality of the entire system.

[0042] Industrial applicability

[0043] The proposed pressure reducing unit has high industrial applicability and is designed for a wide range of applications in various industries where a stable reduction and maintenance of the pressure of the working medium (water, technical liquids) at high flow rates is required.

[0044] Advantages for industrial applications:

[0045] Reliability - built-in protection against overpressure (relief valve) and backflow (check valves);

[0046] Continuous operation - the possibility of maintenance without stopping the supply of the medium (bypass);

[0047] Ease of operation - visual control (pressure gauges), manual control (valves);

[0048] Efficiency - reduced energy costs for maintaining pressure, extending the service life of the equipment.

[0049] The pressure-reducing unit fully complies with industrial requirements, including GOST R 56417-2015 "Control Valves. General Specifications" and similar standards. This production-ready design ensures high reliability and cost-effectiveness in real-world industrial conditions.

Claims

1. A pressure-reducing unit comprising a housing with inlet and outlet pipes, in which a pressure-reducing valve is installed, configured with the possibility of moving the shut-off element, characterized in that it comprises inlet and outlet manifolds connected via a fluid medium to the corresponding pipes, between the manifolds a main line is connected with a series-connected pressure-reducing and check valves and a bypass line with a series-connected bypass line valve and a relief valve.

2. A pressure-reducing unit according to paragraph 1, characterized in that it contains an input pressure gauge with a pressure gauge valve, connected via a fluid medium to the input manifold.

3. A pressure-reducing unit according to paragraph 1, characterized in that it contains an outlet pressure gauge with a pressure gauge valve, connected via a fluid medium to the outlet manifold.

4. A pressure-reducing unit according to paragraph 1, characterized in that the main line is equipped with a valve installed between the inlet manifold and the pressure-reducing valve.

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