Adjusting valve with self-sealing function

Abstract

The invention relates to a fluid control valve and provides an adjusting valve with the self-sealing function. The adjusting valve is reasonable in structure, high in safety and good in sealing effect and integrates the functions of checking, filtering and water saving. The adjusting valve comprises a valve body, a valve rod, a valve deck, a drive device and a sealing press plate. The valve body is provided with a water inlet and a water outlet for medium circulating. The position, located at the joint of the water inlet and the water outlet, of the valve body is further provided with a valve port. The valve deck is arranged above the valve body. The adjusting valve further comprises a floating valve clack. The floating valve clack is arranged on the valve port in the valve body in an opening and closing manner. The sealing press plate is arranged above the floating valve clack. A check spring is arranged between the sealing press plate and the floating valve clack. One end of the valve rod penetrates the valve deck to be fixedly connected with the sealing press plate. The drive device is arranged at the free end of the valve rod.

Description

technical field [0001] The invention relates to a fluid control valve, in particular to a regulating valve with self-sealing function. Background technique [0002] Globe valve, also called cut-off valve, is installed in the pipeline to control the circulation or cut-off of the medium in the pipeline. The existing globe valve includes valve body, valve stem, bonnet, valve disc, pressure cap and handwheel. The valve body is provided with a water inlet and a water outlet for medium circulation, and the valve body is located at the intersection of the water inlet and the water outlet and also has a valve port, the valve cover is arranged above the valve body, and the pressure cap is arranged Above the cover, the valve clack can be opened and closed on the valve port in the valve body, one end of the valve stem passes through the pressure cap and the valve cover and is fixedly connected with the valve clack, and the hand wheel is set at the free end of the valve stem When in us...

AI Technical Summary

Problems solved by technology

[0003] 1. It does not have a check function, it cannot prevent the medium in the pipeline from flowing back, and it cannot control the one-way flow of the medium, which brings inconvenience to the cleaning and maintenance of the globe valve

In order to prevent the backflow of the medium in the pipeline, after installing the regulating valve on the tap water pipeline, it is necessary to install a check valve on the pipeline adjacent to the outlet of the shut-off valve. Since the shut-off valve and the check valve are not integral structures, they must be installed separately. , the installation operation is complicated, time-consuming and labor-intensive, which increases the joints of the pipelines, and also increases the installation and maintenance costs, which brings inconvenience to the construction personnel, and the separate installation of the check valve occupies the position of the pipeline

[0004] 2. It does not have the filtering function. In order to remove the suspended impurities in the pipeline, after installing the shut-off valve on the tap water pipeline, it is necessary to install a filter device on the adjacent pipeline near the shut-off valve, which also increases the cost of installation and maintenance. inconvenience to staff

[0005] 3. The water outlet pressure of the above cut-off valve is not adjustable, and has no decompression effect. The water outlet pressure of the valve port cannot be adjusted according to the actual use situation, and it does not have the function of saving water.

[0006] 4. The sealing effect of the above globe valve is not good, and water often leaks from the joint between the valve cover and the valve body after a long time of use.

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