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Piston bucket type low-pressure vapor drain valve

A low-pressure steam, bucket-type technology, applied in the direction of steam traps, mechanical equipment, etc., can solve the problems that cannot meet the technical requirements for the selection of ethylene steam traps, and achieve the elimination of air blockage and steam lock, sensitive action, and steam leakage small loss effect

Inactive Publication Date: 2009-08-26
GANSU HONGFENG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the known lever-piston bucket-type steam trap has a nominal pressure of PN160, a maximum allowable temperature of TMA427°C, and a maximum displacement of less than 3800Kg / h, which cannot meet the technical requirements for the selection of 1 million tons / year ethylene steam trap.

Method used

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  • Piston bucket type low-pressure vapor drain valve
  • Piston bucket type low-pressure vapor drain valve
  • Piston bucket type low-pressure vapor drain valve

Examples

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Embodiment Construction

[0017] exist figure 1 , 2 , 3, 4, and 5: the left and right sides of the valve body 1 are respectively provided with an inlet hole 26 and an outlet hole 33 for the working medium, and a hole is provided on the valve body 1 along the inlet hole 26 to communicate with the inlet hole 26 , A hole is provided on the valve body 1 upward along the outlet hole 33 , communicating with the outlet hole 33 . The valve cover 2 is provided with a hole, one end of the hole communicates with the main valve seat 5 , and the other end communicates with the outlet hole 33 . The signboard 29 is fixed on the top left side of the valve cover 2 with a signboard rivet 30 . Valve body 1 and bonnet 2 are PN25 in terms of strength and pressure. They are all made of WCB castings at one time, which can meet the safe use requirements of steam traps at a maximum allowable temperature of 260°C and a pressure (maximum allowable pressure of 1.7MPa·G). The wall thickness and pressure level of the valve body ...

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Abstract

The invention relates to a piston bucket type low-pressure vapor drain valve. The drain valve is characterized in that: the left side and the right side of a valve body (1) are provided with an inlet hole (26) and an outlet hole (33) respectively; the valve body (1) is downwardly provided with a hole along the inlet hole (26), and upwardly provided with a hole along the outlet hole (33); and a valve cover (2) is provided with a hole, and the valve body (1) and the valve cover (2) which are castings in one-time cast forming. One end of a main valve seat control stand (6) is in threaded connection with a main valve seat (5) in a cavity, the external diameter of the main valve seat control stand (6) is in threaded connection with the valve cover (2), the other end of the main valve seat control stand (6) is in threaded connection with a connecting plate (13), and the joint between a connecting rod (12) and a guide cap (10) is arranged in the inner cavity of the main valve seat control stand (6). The other end of the connecting rod (12) is connected with a bucket (18). The drain valve has the advantages that: the condensation water can be drained in time, the vapor leakage loss is minimized, the loaded vapor leakage rate is less than 2 percent, the range of the operating pressure is wide, the water drainage is not affected after pressure change, the back pressure rate is more than 90 percent, the condensation water is easy to recover, the air blocking and the vapor locking phenomena can be eliminated, along with flexible action, reliability, little noise and long service life.

Description

technical field [0001] The invention relates to a low-pressure steam trap, and more specifically relates to a piston bucket-type low-pressure steam trap which can meet the requirements of automatic steam blocking and drainage of low-pressure steam delivery pipelines and indirect heating equipment and recovery of condensed water by using the back pressure of the trap. Background technique [0002] At present, the known lever-piston bucket-type steam trap has a nominal pressure of PN160, a maximum allowable temperature of TMA427°C, and a maximum displacement of less than 3800Kg / h, which cannot meet the technical requirements for the selection of 1 million tons / year ethylene steam trap. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the insufficient displacement of the existing piston bucket type steam trap at low pressure, and to provide a double-seat cut-off type with large working range, good stability and reli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16T1/30
Inventor 刘金海
Owner GANSU HONGFENG MASCH CO LTD
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