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Self-reliance type automatic recirculating pump protecting valve

A technology for recirculation pumps and protection valves, applied in the direction of variable capacity pump components, pump control, pump components, etc., can solve the problems of inconvenient installation and maintenance, complicated operation, etc., achieve high economy, no energy loss, and reduce investment cost effect

Inactive Publication Date: 2014-06-04
HUBEI HIGH & HIGH PRESSURE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing recirculation system needs to have the following functions: flow measurement, check valve, pressure relief and flow regulation, so the entire recirculation system includes flow meter, control loop, minimum flow regulating valve, electric (or pneumatic) execution Mechanisms, check valves and other mechanisms require manual adjustment during use, additional power supply and control signals and other actuators, and additional power supply, which is not only complicated to operate, but also very inconvenient to install and maintain

Method used

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  • Self-reliance type automatic recirculating pump protecting valve
  • Self-reliance type automatic recirculating pump protecting valve
  • Self-reliance type automatic recirculating pump protecting valve

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0022] Such as figure 1 The self-operated automatic recirculation pump protection valve shown includes a valve body 1 with a main channel inlet 1.1, a main channel outlet 1.2 and an assembly port 1.3, a valve cover 2 sealingly connected with the assembly port 1.3, and one end connected to the valve cover 2 Spring 6 connected inside, check disc 8 with bypass channel 8.1, valve core 9 composed of stroke section 9.1 and bypass section 9.2, and bypass flange with bypass channel outlet 10.1 10. The other end of the spring 6 is connected to the check disc 8, the check disc 8 is also provided with a decompression opening 8.2, the stroke section 9.1 of the spool 9 is located in the bypass channel 8.1, and the bypass of the spool 9 The section 9.2 is provided with a bypass channel 9.2.1 and a plurality of throttling holes 9.2.2, and the valve core 9 is ...

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Abstract

The invention relates to a self-reliance type automatic recirculating pump protecting valve which comprises a valve body, a valve cover, a spring, a check valve clack, a valve element and a bypass flange. The valve body is provided with a main flow channel inlet, a main flow channel outlet and an assembling opening. The valve cover is in sealing connection with the assembling opening. One end of the spring is connected with the inner side of the valve cover. The check valve clack is provided with a bypass flow channel. The valve element comprises a stroke section and a bypass section. The bypass flange is provided with a bypass flow channel outlet. The other end of the spring is connected with the check valve clack which is provided with a pressure reducing opening. The stroke section of the valve element is placed in the bypass flow channel. The bypass section of the valve element is provided with a bypass water channel and at least one throttling opening. The valve body is further provided with a bypass assembling opening which is in sealing connection with the bypass flange. The pressure reducing opening, the throttling opening, the bypass water channel and the bypass flow channel outlet are communicated in sequence. The self-reliance type automatic recirculating pump protecting valve is compact in structure, a power supply and control signals do not need to be added, an actuator is avoided, automatic operation can be carried out, mounting is convenient, on-line maintaining can be carried out, and maintaining is convenient.

Description

technical field [0001] The invention relates to a valve, in particular to a self-operated automatic recirculation pump protection valve used in an automatic recirculation pump protection system in a liquid delivery system. Background technique [0002] Recirculation pump protection valve, also known as empty check valve and minimum flow valve, is a special valve suitable for the recirculation system of the feed water pump. It is usually installed at the outlet of the feed water pump and is widely used in industrial fields such as power plants, steel mills and chemical plants. . [0003] Especially in industrial fields such as thermal power plants, steel mills, and chemical plants, boiler feed pumps are used more often. As important auxiliary machines, they are directly related to the safe and economical operation of factories. In addition to the reasonable structure, strict manufacturing process and excellent material of the feed water pump, its anti-cavitation performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/10F04B49/22
Inventor 吴武涛李本林罗凯靖金桃张素珍
Owner HUBEI HIGH & HIGH PRESSURE VALVE CO LTD
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