A pilot-operated pressure regulating valve heating system with overpressure protection
A technology of overpressure protection and heating system, applied in the direction of pipeline system, pipeline heating/cooling, pipe/pipe joint/pipe fitting, etc., can solve problems such as consumption and large energy, achieve equipment safety and production safety, and eliminate potential safety hazards Effect
Active Publication Date: 2016-01-20
PIPECHINA SOUTH CHINA CO
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Problems solved by technology
However, these physical heating methods cannot fundamentally eliminate the hidden danger of "ice blockage", and also consume a large amount of energy
Method used
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Embodiment Construction
[0042] Embodiment. The specific embodiment of the present invention is described with this example and the present invention is described further. This example is a special heating device for pilot-operated pressure regulating valve, its composition is as follows figure 2 As shown, it includes pilot monitoring valve 1 (RMG650), pilot pressure regulating valve 2 (RMG512), emergency shut-off valve 3 (RMG711), pilot gas heater 9, pressure sensing device and Other ancillary equipment, etc. This example does not change the arrangement and combination of pilot-operated monitoring valve 1, pilot-operated pressure regulating valve 2 and emergency shut-off valve 3 in the skid-type pressure regulating device, and the respective functions of these devices will not change. VTGH-DP The overpressure protection device 6, the VTGH outlet ball valve 7, and the pilot air inlet ball valve 8 are connected to the skid-type pressure regulating device, and the pilot valve pilot I4 and pilot valve ...
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The invention relates to a heating system for a pilot type pressure regulating valve with an over-pressure protection function. Between an emergent stop valve (3) and a guide type monitor valve (1), a pipeline passes through a guide gas inlet ball valve (8) and is divided into two pipelines to be connected with a two-channel guide gas-fuel heater (9); another pipeline passes through an over-pressure protection device (6) and is connected with the two-channel guide gas-fuel heater (9); the guide type monitor valve (1) and a guide type pressure regulating valve (2) are connected with an air outlet in sequence; a controller I (4) and a controller II (5) of the pilot type monitor valve (1) and the pilot type pressure regulating valve (2) are connected with each other, then connected with the air outlet, and finally connected with a heating circuit (10) and a heating circuit (11) of the two-channel pilot gas-fuel heater (9) respectively; the two-channel guide gas-fuel heater (9) is connected with the air outlet through a VTGH outlet ball valve (7). The heating system has no moving element, is free from maintenance, has higher reliability, requires no electricity, and has good safety performance.
Description
technical field [0001] The invention relates to a heating system for a pilot-operated pressure regulating valve commander of compressed natural gas with overpressure protection. It relates to the technical field of piping systems. Background technique [0002] With the continuous improvement of the national economy, the demand for natural gas in various domestic industries is also increasing day by day. The use of high-pressure natural gas pipelines to transport natural gas is the only way to transport large quantities of natural gas on land. For long-distance natural gas transport, high-pressure pipelines are generally used, with a pressure of up to 8-10MPa. Natural gas users can be mainly divided into industrial users and household users. These users are usually located in cities. For the safety of the city and the convenience of users, after natural gas is transported through high-pressure long-distance pipelines, it needs to be depressurized before it can be transported...
Claims
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IPC IPC(8): F16L53/00F16L55/07F17D5/00
Inventor 赵吉诗尹克江李睿管湘芝冯少广张鑫赵国星刘萌萌张王宗朱清云
Owner PIPECHINA SOUTH CHINA CO