Backwash type stop valve

A shut-off valve and backwashing technology, which is applied in the direction of lifting valves, valve devices, valve details, etc., can solve the problem of difficult cleaning of shut-off valves

Active Publication Date: 2021-05-14
沪航科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in view of the above-mentioned problems, the present invention provides a backwash type sh

Method used

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  • Backwash type stop valve
  • Backwash type stop valve
  • Backwash type stop valve

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Embodiment Construction

[0024] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiments of the invention are:

[0026] refer to Figure 1 to Figure 4 As shown, a backwash type stop valve includes a valve body 1, a valve disc cover 2, a valve cover 3, a valve stem 4, and a valve disc assembly 5. The valve body 1 has a water inlet 6, a water outlet 7 and a communication port The flow passage 8 of the water inlet 6 and the water outlet 7, the flow passage 8 is provided with a valve seat 9, and the valve seat 9 is provided with a primary sealing surface 10 and a secondary sealing surface 11, and the valve seat 9 includes a middle The valve seat body 91 whose opening communicates with the flow channel 8 is provided with a first annular groove 92 and a second annular groove 93 sequentially recessed inward along the radial direction on the valve seat body 91, so that the valve seat body 91 is located on the first A partiti...

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Abstract

The invention relates to a backwash type stop valve which mainly solves the problem of high cleaning difficulty of the stop valve in the prior art, and comprises a valve body, a valve clack cover, a valve cover, a valve rod and a valve clack assembly, wherein the valve body is provided with a water inlet, a water outlet and a flow channel, the flow channel is provided with a valve seat, the valve seat is provided with a primary sealing surface and a secondary sealing surface, the valve rod is arranged on the valve body in a penetrating manner; the valve clack cover is connected to the valve body in a locking mode to achieve sealing between the flow channel and the outside, the valve cover is locked on the valve clack cover, padding is filled between the valve cover and the valve clack cover and located on the peripheral side of the valve rod, the side wall of the valve clack cover extends upwards to form a supporting part, a valve rod nut is arranged on the supporting part, and the valve rod nut is in threaded connection to the valve rod; the valve clack assembly is arranged at the inner end of the valve rod, the valve clack assembly makes contact with the primary sealing surface and the secondary sealing surface in sequence by rotating the valve rod; when the primary sealing face makes contact with the valve clack assembly, washing of the flow channel in the valve body is achieved; and when the secondary sealing surface makes contact with the valve clack assembly, the stop valve is closed.

Description

technical field [0001] The invention relates to the field of valves, in particular to a backwash type stop valve. Background technique [0002] The globe valve has a wide range of uses, and is the most direct and reliable valve type among all valves. It is not only suitable for medium and low pressure, but also suitable for low temperature, high temperature, high pressure, ultra-high pressure and other working conditions. The sealing principle of the globe valve is to rely on the transmission mechanism to transmit the force to the sealing surface of the valve disc through the valve stem. The sealing surface of the valve disc and the sealing surface of the valve seat form a forced seal through the principle of extrusion elastic deformation, and there is no friction on the sealing surface. The seal is reliable. [0003] Due to impurities contained in the medium conveyed in the pipeline, during the long-term use of the globe valve, the impurities contained in the medium accumu...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K1/36F16K1/42F16K1/46F16K1/48F16K1/32F16K27/02F16K3/08F16K31/60F16L29/00B08B9/032
CPCF16K1/00F16K1/36F16K1/42F16K1/465F16K1/482F16K1/32F16K27/02F16K3/08F16K31/60F16L29/00B08B9/032
Inventor 陈思良谢洪文张书恩黄超煌卢爱山
Owner 沪航科技集团有限公司
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