Double effect slow closing check valve
A check valve and slow-closing technology, applied in the direction of control valves, valve devices, functional valve types, etc., can solve problems such as inapplicability, and achieve the effect of avoiding water backflow and water hammer impact
Active Publication Date: 2018-05-29
山西臻航机电技术有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the disadvantage that ordinary slow-closing check valves cannot be applied to pumps in two flow operating states, and to provide a check valve that uses rotational inertia resistance and hydraulic piston resistance to realize slow opening and slow closing under two flow operating states. return valve
Method used
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[0024] The present invention is further described below in conjunction with accompanying drawing.
[0025] refer to Figure 1 to Figure 12 , The double-effect slow-closing check valve includes a fixed bonnet 1, a set screw 13, a fixed plug 11, a spring 2, a steel ball 3, a valve core 7, a spring 4, a valve plate 6, a piston ring, and a valve body 5.
[0026] The valve plate 6 is circular. The fixing plug 11 is cylindrical. The valve body 5 is cylindrical, and the two ends of the valve body 5 are valve body flange 1 35 and valve body flange 2 36 respectively. There is a fixed groove 21 in the middle of the axially outer end of the valve body flange 1 35, and the fixed groove 21 There are several screw holes 122 around, and there is a large-pitch nut 24 in the middle of the axially outer end of the valve body flange 236, and several water inlet holes 8 and connecting ribs 123 are evenly distributed around the large-pitch nut 24. There is a valve seat groove in the middle of o...
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The invention relates to a double-effect slow-closing check valve, which relates to a check valve. When the double-effect slow-closing check valve is opened, the rotational inertia resistance of the valve core delays the opening time of the double-effect slow-closing check valve. The opening time of the slow-closing check valve is longer than the start-up time of the water pump motor, so as to realize the light-load start-up of the water pump motor. Before the double-effect slow-closing check valve is fully opened, the water pressure between the valve inlet port and the valve outlet port decreases, reducing the hydraulic shock effect when the double-effect slow-close check valve is fully opened. The opening height of the spool of the double-effect slow-closing check valve will change with the flow rate. The delayed closing time also changes with the flow rate of the water pump, which effectively avoids the impact of water hammer and can also close the double-effect slow-closing check valve in time to avoid the backflow of water in the pipeline. The double-effect slow-closing check valve is suitable for pole-changing and flow-changing water pumps in two flow operating states.
Description
technical field [0001] The invention relates to a double-effect slow-closing check valve, which relates to a check valve, in particular to a check valve which adopts the action of rotating inertial resistance and hydraulic piston resistance to realize slow opening and slow closing under two flow operating states. valve. Background technique [0002] The flow rate of ordinary water pumps is constant when they are running. In order to prevent water hammer when the pump is turned off, causing damage to pipelines and equipment, a slow-closing check valve will be installed at the water outlet of the large-flow pump. Ordinary slow-closing check valves can realize slow opening and slow closing or quick opening and slow closing, effectively avoiding the impact of water hammer. [0003] The pole-changing variable-flow water pump using a pole-changing motor is an energy-saving device, which has the advantage of saving energy compared with ordinary water pumps and lower cost than vari...
Claims
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IPC IPC(8): F16K15/06F16K15/18F16K15/04
CPCF16K15/044F16K15/063F16K15/18F16K15/1823
Inventor 赵晓东
Owner 山西臻航机电技术有限公司