CN201844081U - Pipeline overflow valve - Google Patents

Abstract

The utility model relates to a valve, in particular to a pipeline overflow valve, which comprises a valve body and a valve stem. The pipeline overflow valve is characterized in that a valve head and an adjusting spring are arranged in sequence between the valve body and the valve stem, the other end of the valve stem is bolted with a sealing cover on the outer side of a skeleton oil seal in a matching way after penetrating through a gasket, a sealing ring and the skeleton oil seal in sequence, and the tail end of the valve stem is connected with a hand wheel through nuts in a matching way. Compared with the prior art, the utility model has the following advantages that: continuous pressure and flow control can be realized fast and flexibly, the flow can be adjusted along a linear trend, and constant-pressure and quantitative delivery of fluid can be achieved while ensure the safety and stability of a main pipeline; and the pipeline overflow valve has a small structure, is easy to process, is easy to install and has a low cost.

Description

A kind of pipeline relief valve

Technical field

The utility model relates to a kind of valve, is specially a kind of pipeline relief valve.

Background technique

Relief valve is widely used in the industrial production fluid line is carried.The flow spill valve kind is also various; but mainly mostly be hydraulic pressure control valve class; in hydraulic equipment, mainly play level pressure overflow effect and safety protection effect; can controlled hydraulic system when reaching set pressure, keep constant state; when system breaks down; when pressure is elevated to the limit value that may damage; valve port can be opened and overflow; to guarantee the safety of system; during the system proper functioning, valve closing is opened overflow when having only load to surpass the limit of regulation; carry out overload protection, system pressure is no longer increased.And for open in usual (be opening state under the normal condition, and opening aperture is more than 30%) the relief valve class of regulating the pressure of main pipe and flow is less, and existing valve complex structure, form structure are bigger, sealing joint is had relatively high expectations, cause difficulty for the pressure of adjusting main pipe open in usual and the relief valve type selecting and the installation of flow, cost is higher, needs To be improved.

The model utility content

At problems of the prior art, the purpose of this utility model is to provide a kind of technological scheme of pipeline relief valve.

Described a kind of pipeline relief valve, comprise valve body and valve rod, it is characterized in that setting gradually between described valve body and the valve rod valve head and Regulation spring, the other end of valve rod passes behind pad, seal ring, the outside framework oil seal successively and is positioned at the sealing cover threaded in the outside framework oil seal outside, and the end of valve rod is connected by nut and handwheel.

Described a kind of pipeline relief valve, the top angle that it is characterized in that described valve head are 70 degree.

Described a kind of pipeline relief valve is characterized in that described valve head is connected by Regulation spring elasticity with valve rod.

Described a kind of pipeline relief valve is characterized in that described valve head is provided with thick back pressure hole.

Described a kind of pipeline relief valve is characterized in that described valve body and valve rod threaded.

Described a kind of pipeline relief valve is characterized in that described valve body is provided with inlet duct thread screwed fitting and outer pipe thread screwed fitting.

The utility model compared with prior art has following advantage: that can realize fast and flexible carries out continual pressure and Flow-rate adjustment, regulates flow and is linear trend, carries out fluid level pressure, quantitative conveying when having realized the main pipe safety and stability; Structure is small and exquisite, easy processing, and simple installation, cost is low.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an explosive view of the present utility model.

Embodiment

Below in conjunction with Figure of description the utility model is described further:

As shown in the figure, a kind of pipeline relief valve comprisesvalve body 1 and valve rod 7,valve body 1 is provided with inlet duct thread screwedfitting 2 and outer pipe thread screwed fitting 3, valve can be closed and open tovalve body 1 and valve rod 7 threaded byhandwheel 12 clockwise or be rotated counterclockwise; Set gradually valve head 4 and Regulation spring 6 between describedvalve body 1 and the valve rod 7, valve head 4 is connected by Regulation spring 6 elasticity with valve rod 7, and pressure adjusting spring 6 is realized the pressure adjusting of system; The top angle of described valve head 4 is 70 degree, can regulate flow and be linear trend, and valve head 4 is provided with thickback pressure hole 5, andback pressure hole 5 runs through the latter half part of valve head 4, and what be convenient to fast and flexible carries out continual pressure and Flow-rate adjustment; The other end of described valve rod 7 passespad 8,seal ring 9, outsideframework oil seal 11 backs and sealingcover 10 threaded that are positioned at outsideframework oil seal 11 outsides successively, good sealing effect, and the end of valve rod 7 is connected bynut 13 andhandwheel 12.

Must be in full-gear before the utility model uses, when fluid enters from inlet duct thread screwed fitting 2, and after fillingfull valve body 1, pressure and the flow according to system's needs carries out manual preconditioning again, can realize automatic adjusting after stablizing.

Concrete, inlet duct thread screwedfitting 2 is connected on the pipe-line system that needs fluid over-flow and pressure regulation, outer pipe thread screwed fitting 3 is connected in the fuel tank, when system's generation flow of regulating when needs, pressure change, but, make its flow that reaches expection and pressure requirement by the switching ofrotation hand wheel 12 manual tune valves; The effect ofback pressure hole 5 is to make the space of Regulation spring 6 can be full of fluid rapidly when fluid just enters, and is unlikely to leave over air and causes valve head 4 because of building the pressure stuck or moving bad; When fluctuation takes place in system in running, the elasticity of Regulation spring 6 can make valve head 4 automatic regulating system pressure under predetermined pressure, valve head 4 is flexible up and down when regulating automatically, fluid in the space of Regulation spring 6 also can flow rapidly, reduce resistance, in order to avoid valve head 4 is excessive or build the pressure stuckly because of resistance, causes and regulate to lose efficacy.

By test of many times, it is stable, and Flow-rate adjustment reaches linear requirement, and pressure can electrodeless adjusting in the limit of power of setting, and has solved type selecting and difficulty is installed, and has replenished the type shortcoming of existing relief valve.

Claims (6)

1. pipeline relief valve, comprise valve body (1) and valve rod (7), it is characterized in that setting gradually between described valve body (1) and the valve rod (7) valve head (4) and Regulation spring (6), the other end of valve rod (7) passes pad (8), seal ring (9), outside framework oil seal (11) back and sealing cover (10) threaded that is positioned at outside framework oil seal (11) outside successively, and the end of valve rod (7) is connected by nut (13) and handwheel (12).

2. a kind of pipeline relief valve according to claim 1, the top angle that it is characterized in that described valve head (4) are 70 degree.

3. a kind of pipeline relief valve according to claim 1 and 2 is characterized in that described valve head (4) is connected by Regulation spring (6) elasticity with valve rod (7).

4. a kind of pipeline relief valve according to claim 1 and 2 is characterized in that described valve head (4) is provided with thick back pressure hole (5).

5. a kind of pipeline relief valve according to claim 1 is characterized in that described valve body (1) and valve rod (7) threaded.

6. a kind of pipeline relief valve according to claim 1 is characterized in that described valve body (1) is provided with inlet duct thread screwed fitting (2) and outer pipe thread screwed fitting (3).

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