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Pneumatic automatic control three-way valve

A three-way valve, pneumatic technology, used in multi-way valves, valve details, valve devices, etc., can solve problems such as increasing investment and operation and maintenance costs, reducing system reliability, and complicating control systems, reducing investment. And operation and maintenance cost, simple structure, good sealing effect

Active Publication Date: 2016-08-17
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has great disadvantages: two sets of valve systems are required, and there are many signal points to be collected, which not only leads to the complexity of the control system, reduces the reliability of the system operation, increases the investment and operation and maintenance costs, but also increases the cost of the system. Runtime Space Requirements

Method used

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  • Pneumatic automatic control three-way valve
  • Pneumatic automatic control three-way valve
  • Pneumatic automatic control three-way valve

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] combine Figure 1~3 , the pneumatic automatic control three-way valve consists of valve T-shaped frame 1, detachable baffle seat 2, 3, single sealing baffle 12, double sealing baffle 13, position switch 10, pneumatic actuator 6, pneumatic actuator The installation frame 11, the pressure measuring tube 7, the pressure gauge support frame 8, the inspection window 15, the actuator 4, the sealing air interface 9, the valve protection cover 14 and the control box 5 are composed.

[0018] The side outlet of the valve is at a 90° angle to the center line of the top outlet. The detachable baffle seat 2 and 3 are connected to the top and side of the valve T-frame 1 with bolts, the double-sealed baffle 13 is installed in the upper baffle seat 2, and the guide rod is perpendicular to the plane where the valve T-frame 1 is located. The single sealing baffle 12 is ins...

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Abstract

The invention provides a pneumatic type automatic control three-way valve. Detachable baffle seats are connected to the upper portion and the lateral surface of a valve T-shaped frame through bolts, a dual-sealing baffle is installed in the baffle seat at the upper portion, and a single-sealing baffle is installed in the baffle seat on the lateral surface. A pneumatic execution mechanism is controlled by a pressure measurement signal and a position switch signal on and under the dual-sealing baffle, and waste gas of a diesel engine is discharged from the lateral surface of the valve in the normal working process. After a starting or fault signal is received, a baffle on the lateral surface is closed, a baffle at the upper portion is opened, and the waste gas passes by. Based on a front-back pressure difference signal of the dual-sealing baffle at the upper portion of the valve and a limiting switch signal in the execution mechanism, the execution mechanism is driven through a pneumatic executor, and linkage of the sealing baffles at the upper portion and on the lateral surface is achieved, so that the pneumatic type automatic control three-way valve is opened and closed reliably, good in sealing performance, simple and compact in structure, quite suitable for the technical field of desulfurization and denitrification of waste gas processing of ships, and also suitable for the field of desulfurization and denitrification of power stations.

Description

technical field [0001] The invention relates to a diesel engine waste gas treatment device, in particular to a waste gas bypass device. Background technique [0002] In the technical field of marine exhaust gas post-treatment, both the selective catalytic reduction (SCR) denitrification system of the marine power plant and the exhaust gas scrubbing and desulfurization system need to arrange a bypass line on the exhaust pipe of the diesel engine. When the exhaust gas post-treatment system fails or is overhauled, the exhaust gas of the diesel engine can be bypassed without stopping the diesel engine. In conventional design, to realize the bypass function, a set of valve systems should be installed on the main pipeline and the bypass pipeline respectively. This arrangement is adopted in the desulfurization system of some power plants. However, this method has great disadvantages: two sets of valve systems are required, and there are many signal points to be collected, which no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/052F16K31/12
CPCF16K11/052F16K31/12F16K37/0083F16K37/0091
Inventor 周松刘佃涛朱元清张金钊周金喜王治宇张帮龙
Owner HARBIN ENG UNIV
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