阅读说明：本技术 一种调节阀分体式自保护密封面结构 (Split type self preservation of governing valve protects sealed face structure ) 是由 张含 周蔷 姜皓 李连翠 王周杰 刘春玲 王恒 龚胜泉 贾俊阳 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种调节阀分体式自保护密封面结构,包括阀杆、套筒、阀芯、阀座、阀盖和阀体,阀芯设在阀体内,阀杆的下端穿过阀盖伸入至阀体内与阀芯连接,阀芯外侧设有阀芯保护装置,阀芯保护装置外侧设有套筒,其特征在于,所述的阀芯保护装置的上端通过弹簧与阀盖连接,所述的阀芯保护装置内部空间高度大于阀芯高度。本发明减少了介质对阀芯密封面的直接冲刷作用,有效减少了介质对密封面的冲蚀及磨损,从而降低阀芯密封面的修复或更换的频率,延长使用周期,在经济上也降低了维修的成本。(The invention discloses a split type self-protection sealing surface structure of a regulating valve, which comprises a valve rod, a sleeve, a valve core, a valve seat, a valve cover and a valve body, wherein the valve core is arranged in the valve body, the lower end of the valve rod penetrates through the valve cover to extend into the valve body to be connected with the valve core, a valve core protection device is arranged on the outer side of the valve core, and the sleeve is arranged on the outer side of the valve core protection device. The invention reduces the direct scouring action of the medium on the sealing surface of the valve core, and effectively reduces the erosion and abrasion of the medium on the sealing surface, thereby reducing the frequency of repairing or replacing the sealing surface of the valve core, prolonging the service cycle and economically reducing the maintenance cost.)

1. The utility model provides a split type self preservation of governing valve protects sealed face structure, includes valve rod, sleeve, case, disk seat, valve gap and valve body, and the valve body is inside to be equipped with the disk seat bottom, and the case is established at valve body, disk seat upper portion, and the lower extreme of valve rod passes the valve gap and stretches into and be connected with the case in the valve body, and the case outside is equipped with case protection device, and the case protection device outside is equipped with the sleeve, its characterized in that, case protection device's upper end pass through spring and valve gap connection, case protection device inner space height be greater than the case height.

2. The split self-protecting sealing surface structure of the regulating valve as claimed in claim 1, wherein a guiding structure is provided at a position where the valve plug protecting device contacts the valve seat, the guiding structure is formed by a groove formed by a protrusion and a sleeve at a position where the valve seat contacts the valve plug, and a bottom end of the valve plug protecting device is provided in the groove.

3. The split self-protecting sealing surface structure of the regulating valve as claimed in claim 1, wherein the valve core protecting device is provided with a boss for positioning the spring.

Technical Field

The invention relates to a split type self-protection sealing surface structure of a regulating valve, relates to a self-protection sealing surface structure of a regulating valve for reducing erosion wear, and belongs to the field of processing engineering and valves.

Background

The existing regulating valve comprises a valve body, a valve seat, a valve core, a sleeve, a valve rod and the like (figure 1), wherein the valve core acts on the valve seat to play a sealing role, the valve core does not have a peripheral protection device, a medium directly scours and acts on a valve core sealing surface (figure 2) in the opening and closing processes and then flows out through the sleeve, after long-term use, the medium can generate more serious erosion and abrasion on the sealing surfaces of the valve core and the valve seat, the tightness is reduced, the frequency of repairing the valve core sealing surface or replacing a new valve core is higher, and the repairing of the sealing surface is a large and important work. The latter solution must then be able to solve this problem.

The valve core of the existing regulating valve has no peripheral protection device, and when a medium flows into a valve cavity from an inlet of the valve body in the opening or closing process of the valve, the medium is directly washed on a sealing surface of the valve core and then flows out of the valve body through a sleeve. Because the medium directly acts on the valve core sealing surface, the medium can cause more serious erosion and abrasion to the sealing surface, the valve core sealing surface is easy to damage, the tightness is reduced, the frequency of repairing or replacing the valve core sealing surface is higher, the service cycle is shorter, the quantity of the repaired valve core sealing surface is large and important engineering, and the maintenance cost is increased economically. The improved technical scheme is that a protection device is added on the periphery of the valve core, and the structure can effectively protect the sealing surface of the valve core and reduce the direct erosion and abrasion of the sealing surface of the valve core by media.

The invention patent of the publication number CN 206889687U discloses a regulating valve with a valve core protection device, which comprises a valve body, a valve seat, a valve cover, a valve rod and a valve core, wherein the valve core is arranged in the valve body, the lower end of the valve rod penetrates through the valve cover and extends into the valve body to be connected with the valve core, the outer side of the valve core is sleeved with the valve core protection device, the upper end of the valve core protection device is connected with the upper end of the valve core through a spring, and the valve core protection device is arranged on the outer side of the valve core, and the upper end of the valve core protection device is connected with the valve core through the spring, so that only the side surface of the valve.

Disclosure of Invention

The invention aims to solve the technical problem of how to better protect the bottom of the valve core from being washed by fluid.

In order to solve the technical problem, the technical scheme of the invention provides a split type self-protection sealing surface structure of a regulating valve, which comprises a valve rod, a sleeve, a valve core, a valve seat, a valve cover and a valve body, wherein the valve seat is arranged at the lowest end in the valve body, the valve core is arranged in the valve body and on the upper part of the valve seat, the lower end of the valve rod penetrates through the valve cover and extends into the valve body to be connected with the valve core, a valve core protection device is arranged on the outer side of the valve core, the sleeve is arranged on the outer side of the valve core protection device, the upper end of the valve core protection device is connected with the valve cover.

Preferably, a guide structure is arranged at the position where the valve core protection device contacts the valve seat, the guide structure is formed by a groove formed by a protrusion and a sleeve at the position where the valve seat contacts the valve core, and the bottom end of the valve core protection device is arranged in the groove.

Preferably, the valve core protection device is provided with a boss for positioning the spring.

Drawings

Fig. 1 is a schematic structural diagram of a conventional regulating valve.

Fig. 2 is a schematic diagram of the operation of the conventional medium.

FIG. 3 is a schematic structural diagram of the present invention.

FIG. 4 is a schematic diagram of the operation of the present invention with media.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.