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Negative pressure valve

A valve and negative pressure technology, applied in the direction of lift valve, valve device, engine components, etc., can solve the problems of slow valve opening speed, high processing accuracy requirements, high sealing process requirements, and achieve fast opening and closing, low processing accuracy requirements, Sealing process requires simple results

Inactive Publication Date: 2008-11-26
刘智仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages that also exist are: 1. When the valve is opened, the valve cannot be fully opened until the floating block sealing ring separates from the sealing surface and floats up along the screw rod because it first flows out from the pressure relief hole; when the valve is closed, the screw rod together with the sealing The plate rotates and pushes downward along the bonnet and screw connection thread, the sealing plate closes the floating block seal ring and the water outlet hole of the floating seal ring, and the opening speed of the valve is slow and troublesome; And the lower wall of the threaded section of the screw is sealed at the same time, the sealing ring of the floating block is sealed with the valve body, the sealing plate and the sealing ring of the floating block, the sealing process requires high requirements, high processing accuracy requirements, and high material requirements

Method used

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  • Negative pressure valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] refer to figure 1 , a negative pressure valve, comprising a valve body 1, a valve cover 2, and an opening device. The valve body 1 is provided with a water inlet hole 3 and a water outlet hole 4 with external threads. The water inlet hole 3 and the water outlet hole 4 are connected through the lower hole 5, and the opening device includes a screw 6, and the screw 6 passes through the valve cover 2 and extends into the water inlet hole 3, and the screw 6 is threadedly connected with the valve cover 2, and the screw 6 The upper end of the upper end is equipped with a hand wheel, the lower end of the screw rod 6 is fixedly connected to the lower hole sealing plate 7, and the lower hole sealing plate 7 is matched with the lower hole 5; the water inlet 3 is provided with a partition 8. The partition plate 8 divides the water inlet hole into an upper cavity 9 and a lower cavity 10. The partition plate 8 is provided with an upper hole 11 connecting the upper cavity 9 and the l...

Embodiment 2

[0016] A negative pressure valve, comprising a valve body 1, a valve cover 2, and an opening device. The valve body 1 is provided with a water inlet hole 3 and a water outlet hole 4 with flange connectors inside, and other structures are the same as those in Embodiment 1. .

[0017] The working process of this embodiment is the same as that of Embodiment 1.

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Abstract

The invention discloses a negative pressure valve, which comprises the following parts: valve body, valve bonnet and open device, wherein the valve body contains inlet and outlet, which connect through lower hole; the open device contains screw rod, which pierces valve lid in the water hole; the screw rod connects valve lid through screw thread; the bottom of screw rod is fixed on the lower hole sealing plate, which mates lower hole in the lower cavity; the screw rod pierce the upper hole; the middle of screw rod connects upper hole sealing plate, which mates upper hole in the upper cavity; the sectional area of upper hole adapts the lower hole's.

Description

(1) Technical field [0001] The invention relates to a negative pressure valve. (2) Background technology [0002] The Chinese patent publication number is CN1307192A, and the invention name is an invention patent of a negative pressure valve, which discloses a negative pressure valve, including a valve cover, an inner step of a screw rod, a sliding sealing ring, a water inlet hole, a valve body, a sealing plate, and a floating block seal. Ring, pressure relief hole and water outlet hole, the sliding sealing ring is set on the screw rod and located at the lower part of the valve cover and the inner step of the screw rod, the lower part of the screw rod is provided with a sealing plate, the floating block sealing ring is arranged between the sealing surfaces of the sealing plate, and the center line of the sealing plate On the same straight line as the center line of the small water outlet hole of the floating block sealing ring, the water inlet hole is located at the right or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/02
Inventor 刘智仁
Owner 刘智仁
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