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Check valve with spring pre-tightening force adjustable

A spring preload, check valve technology, applied in the direction of control valve, valve device, functional valve type, etc., can solve the problem of certain opening water pressure, etc.

Inactive Publication Date: 2013-05-15
TIANJIN GUOWEI FEEDING & DRAINAGE EQUIP MENT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing backflow preventer check valve corresponds to a certain opening water pressure, which cannot meet various needs under different working conditions, which requires a check valve structure that can be applied under various working conditions

Method used

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  • Check valve with spring pre-tightening force adjustable

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0012] Such as figure 1 As shown, the present invention includes a valve body 1, a valve seat 2, a valve plate 3, a valve stem 4 and a spring 5, the valve seat 2 is stuck at the opening of the valve body 1, and one side of the valve plate 3 is in contact with the valve body. The valve seat 2 is contact-sealed, the valve stem 4 passes through the valve seat 2 and the valve plate 3 and is fixed by a nut, the spring 5 passes through the valve stem 4, and one end is fixed on the valve seat 2, One end is connected with an adjusting washer placed on the adjusting nut 6, and the adjusting nut 6 is connected with the corresponding outer thread of the valve stem 4 through an inner thread.

[0013] When in use, the spring 5 can adjust the pre-tightening force, relying on the rotation of the adjusting nut 6 to drive the adjusting gasket to move left and ...

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Abstract

The invention provides a check valve with spring pre-tightening force adjustable. The check valve comprises a valve body, a valve seat, a valve plate, a valve rod and a spring. The valve seat is clamped on an opening of the valve body; one side of the valve plate is connected with the valve seat; the valve rod penetrates through the valve seat, and the valve plate is fixed through a nut; the spring penetrates through the valve rod, one end of the spring is fixed on the valve seat, and one end of the spring is connected with an adjusting shim placed on an adjustment nut; and the adjusting nut is connected with outer threads corresponding to the valve rod through inner threads. The check valve with the spring pre-tightening force adjustable has the advantages that because the pre pre-tightening force of the spring of the check valve is adjustable, the adjusting nut rotates to drive the adjusting shim to move left and right along the valve rod, and therefore compression amount of the spring is changed, the pre-tightening force of the spring is adjusted, and accordingly pressure loss of the check valve is changed to satisfy requirements of different users.

Description

technical field [0001] The invention relates to a check valve structure, in particular to a check valve with adjustable spring preload. Background technique [0002] The water inlet and outlet check valve of the backflow preventer needs artificial pressure loss, and the check valve plate can only be opened under a certain pressure. The existing backflow preventer check valve corresponds to a certain opening water pressure, which cannot meet various needs under different working conditions, which requires a check valve structure applicable under various working conditions. Contents of the invention [0003] The object of the present invention is to provide a check valve with simple structure, safety and reliability, and adjustable spring preload. [0004] The technical solution of the present invention is: a check valve with adjustable spring preload, comprising a valve body, a valve seat, [0005] Valve plate, valve stem and spring, the valve seat is stuck at the opening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06
Inventor 刘永刘庆龚高石刘杰
Owner TIANJIN GUOWEI FEEDING & DRAINAGE EQUIP MENT MFG
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