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Adjustable vacuum breaker valve for water turbine

A vacuum breaker valve, adjustable technology, applied in the direction of lifting valves, valve devices, mechanical equipment, etc., can solve problems such as environmental pollution, unadjustable vacuum degree, buffer oil leakage, etc., achieve good sealing effect and prevent uneven force , The effect of preventing buffer oil leakage

Active Publication Date: 2019-08-16
SICHUAN SUKE FLUID CONTROL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing vacuum breaker valves usually use oil pressure buffering, and the vacuum degree cannot be adjusted. After a period of use or when the vacuum degree changes due to pipeline vibration, the buffer oil will gradually leak and cause environmental pollution.

Method used

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  • Adjustable vacuum breaker valve for water turbine
  • Adjustable vacuum breaker valve for water turbine
  • Adjustable vacuum breaker valve for water turbine

Examples

Experimental program
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Embodiment Construction

[0029] Such as Figure 1 to Figure 8 As shown, the adjustable vacuum breaker valve for water turbine provided in this embodiment includes a vacuum breaker valve 1, a secondary return water sealing float valve 2, a valve disc 3 and a valve body 6, and the valve body 6 is installed on the top of the vacuum breaker valve 1 , the secondary water return sealing float valve 2 is installed in the valve body 6; the vacuum breaker valve 1 includes a valve stem 11, a spring 12 and a valve seat 13, the upper part of the valve stem 11 is covered with a spring 12, and the bottom part is covered with a valve disc 3 Spherical adjustment pad 14 and nut 15, cotter pin 16 is installed on the nut 15, which can prevent the nut 15 from rotating and falling off; the valve stem 11 is in clearance fit with the valve disc 3 and the joint between the valve stem 11 and the valve disc 3 An inclined surface is processed so that the valve disc 3 can swing within a certain range, which has an automatic cent...

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Abstract

The invention discloses an adjustable vacuum breaking valve for a water turbine. The adjustable vacuum breaking valve comprises a vacuum breaking valve body, secondary return water sealing floating ball valves, a valve body and a valve clack. The vacuum breaking valve body is provided with a valve seat, a valve rod and a vacuum degree adjusting device. The vacuum degree adjusting device comprisesa vacuum degree adjusting block, an adjusting window, anti-rotation pins and hand shanks. The vacuum degree adjusting block is arranged on the valve rod in a sleeving mode and located on the top of aspring. The side face of the vacuum degree adjusting block is uniformly provided with a plurality of adjusting positions and a plurality of pin holes. The anti-rotation pins penetrate through the pinholes to be fixedly arranged on the valve rod. The adjusting window is mounted in the valve body and located on the side face of the vacuum degree adjusting block. The hand shanks are inserted into the adjusting positions. The retractable distance of the spring is adjusted through the vacuum degree adjusting block by rotating the hand shanks, so that the vacuum degree is adjusted. The vacuums degree adjusting device is arranged on the vacuum breaking valve and achieves adjustment of the vacuum degree. The phenomenon of vacuum degree change caused by pipeline vibration can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an adjustable vacuum breaking valve for a water turbine. Background technique [0002] The vacuum breaker valve for water turbine is an air supply component used for air supply in the center of the upper main shaft of the water turbine and in the upper cavity of the runner. When the water guiding mechanism is closed in an emergency, the runner chamber will generate a relatively high vacuum under the action of the inertia of the water flow and the water pump of the runner, which will cause the tail water to recoil, resulting in a large impact force or lift-off At this time, it is necessary to supplement the air to the center of the main shaft to reduce the impact force or avoid the lifting phenomenon, so as to protect the turbine. During normal operation, it is necessary to supply air to the upper cavity of the runner through the central hole of the main shaft to ensure the normal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/00F16K1/52F03B15/00
CPCF03B15/00F16K1/00F16K1/52Y02E10/20
Inventor 张道军贾怀军李威
Owner SICHUAN SUKE FLUID CONTROL EQUIP CO LTD