Magic block type pressure reduction hidden spherical sealing regulating valve

Abstract

The invention belongs to the technical field of sealing regulating valves, and discloses a magic block type pressure reduction hidden spherical sealing regulating valve which comprises a valve body, a liquid inlet cavity and a liquid outlet cavity are formed in the valve body, a valve seat is arranged between the liquid inlet cavity and the liquid outlet cavity, a multi-stage trapezoidal valve cage is arranged above the valve seat, and the multi-stage trapezoidal valve cage is arranged outside a valve clack in a sleeving mode and pressed on the valve seat. A plurality of flow guide holes with the same specification are evenly formed in the cage wall of the multi-stage trapezoid valve cage in the circumferential direction, the flow guide hole in the lowest position is higher than the sealing face of the valve seat, so that the multi-stage trapezoid valve cage protects the sealing face of the valve seat, and a first anti-scouring layer is formed. A sealing ball protrusion is arranged in the center of the lower portion of the valve clack, and a circle of downward annular protrusion is arranged on the periphery of the sealing ball protrusion. The valve seat is provided with a ball concave part and an annular concave part corresponding to the sealing ball protrusion and the sealing annular protrusion, and the annular protrusion is a second anti-scouring layer. The high-pressure-difference drain regulating valve is reasonable in design, effectively improves the reasonability of the structure of internal parts of the drain regulating valve, greatly improves the sealing performance, can achieve zero leakage and scouring resistance, and prolongs the service life.

Description

Technical Field

[0001] The invention belongs to the technical field of sealed regulating valves, and in particular relates to a magic block type pressure-reducing hidden spherical sealed regulating valve. Background Art

[0002] The steam trap regulating valve is suitable for valves in high-temperature and high-pressure steam trap pipelines. Its basic function is to discharge condensate and steam in the steam system in time; at the same time, it prevents steam leakage as much as possible to reduce heat loss.

[0003] The traditional steam trap regulating valve moves slowly, the valve core and the valve stem are connected as one piece, and the concentricity problem cannot be solved. It requires pure medium to flow through without impurities. The valve seat and valve are in direct contact with the medium. The valve internals are easily eroded and severely corroded. The service life is short and the maintenance cost is high. With the continuous expansion of the domestic single-machine assembly capacity, the temperature and pressure parameters of the steam trap system are increasing. Conventional steam trap regulating valves can no longer be used in various harsh working conditions such as high temperature and high pressure of the steam trap system, severe erosion of steam-water two-phase flow, many impurities in the medium, cavitation, flash evaporation, vibration, etc. Reform has become an inevitable trend. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention provides a magic block type pressure reducing hidden spherical sealing regulating valve to solve the problems raised in the above background technology.

[0005] The present invention adopts the following technical solutions:

[0006] Magic block type step-down hidden spherical seal regulating valve, the valve disc adopts a high wall type hidden spherical seal multi-layer anti-scouring structure to prevent the spherical seal valve disc and the spherical seal valve seat seal with a step-down porous pet sleeve to avoid direct and serious scouring, including a valve body, a valve cavity is provided in the valve body, and the valve cavity is divided into a relatively upper liquid inlet cavity and a relatively lower liquid outlet cavity. A valve seat is arranged between the liquid inlet cavity and the liquid outlet cavity, and a multi-stage ladder valve cage is arranged above the valve seat. The multi-stage ladder valve cage is sleeved outside the valve disc and pressed on the valve seat. The inner cavity of the valve disc is provided with a groove, and the valve disc is connected to the upper The multi-stage trapezoidal valve cage is connected to a square valve stem, and the cage wall of the multi-stage trapezoidal valve cage is evenly provided with several guide holes of the same specification along the circumferential direction. The lowest guide hole is higher than the sealing surface of the valve seat, so that the multi-stage trapezoidal valve cage protects the sealing surface of the valve seat to form the first anti-scour layer. A sealing ball convex is arranged at the center below the valve disc, and a circle of downward ring convex is arranged on the outer periphery of the sealing ball convex. The valve seat is provided with ball concave and ring concave corresponding to the sealing ball convex and ring convex, and the ring convex is the second anti-scour layer. A pressure plate is arranged above the multi-stage trapezoidal valve cage, and a valve cover is arranged above the pressure plate. The valve stem and the valve cover are vertically slidably connected.

[0007] Preferred: The valve disc adopts a high-walled hidden spherical seal multi-layer anti-scouring structure to prevent the spherical seal valve disc spherical seal valve seat seal with a pressure-reducing porous sleeve to avoid direct and severe scouring.

[0008] Preferably, the valve seat is connected to the pressure reducing sleeve at the bottom, the pressure reducing sleeve is in the shape of a cylinder with a sealed bottom, and a plurality of holes are provided on the cylinder wall.

[0009] Preferably: a sealing gasket is provided between the valve seat and the valve body.

[0010] Preferably: a self-sealing ring is provided between the valve cover and the valve body.

[0011] Preferably, the top end of the valve disc is higher than the multi-stage trapezoidal cage.

[0012] Preferably, the top of the valve stem passes through the valve cover, and the top end of the valve stem is a connector for connecting to a pneumatic, electric, or manual actuator.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention provides a multi-stage trapezoidal valve cage above the valve seat, the multi-stage trapezoidal valve cage is sleeved outside the valve disc, the valve core adopts spherical sealing, a ring convex layer is raised around the sealing surface to protect the sealing surface of the valve core, the multi-stage trapezoidal valve cage flow guide hole is designed to be higher than the valve seat sealing surface, when the valve is opened, because the bottom of the multi-stage trapezoidal valve cage flow guide hole is higher than the valve seat sealing surface, on the one hand, it can avoid the fluid medium from directly scouring the valve seat sealing surface, on the other hand, it can prevent impurities in the medium from blocking the valve seat sealing surface, and at the same time, the valve core can also prevent the fluid medium from directly scouring the valve core sealing surface due to the ring convex protective layer. When the valve is closed, the valve disc sealing surface and the valve seat sealing surface are closely matched, and the outer ring convex protective layer on the bottom surface of the valve disc blocks the valve disc and the valve seat sealing surface, which will prevent the medium fluid from scouring the valve disc spherical seal and the valve seat sealing surface; the present invention is reasonably designed to effectively improve the rationality of the structure of the internal components of the hydrophobic regulating valve, greatly improve the sealing performance of the high-pressure differential hydrophobic regulating valve, and can achieve zero leakage and scouring resistance, and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the whole of the present invention;

[0016] Figure 2 It is a schematic diagram of the combination of a pressure reducing sleeve, a valve seat, a valve disc, and a multi-stage trapezoidal valve cage.

[0017] Description of reference numerals:

[0018] 1 valve body; 2 liquid inlet chamber; 3 liquid outlet chamber; 4 valve seat; 5 pressure reducing sleeve; 6 multi-stage ladder valve cage; 7 valve disc; 8 pressure plate; 9 valve stem; 10 valve cover. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] The magic block type pressure-reducing hidden spherical sealing regulating valve comprises a valve body 1, wherein the valve body 1 has a valve cavity, and the valve cavity is divided into a liquid inlet cavity 2 relatively above and a liquid outlet cavity 3 relatively below. A valve seat 4 is arranged between the liquid inlet cavity 2 and the liquid outlet cavity 3, and a sealing gasket is arranged between the valve seat 4 and the valve body 1. The valve seat 4 is connected to a pressure-reducing sleeve 5 at the bottom. The pressure-reducing sleeve 5 is in the shape of a cylinder with a sealed bottom, and a plurality of holes are arranged on the cylinder wall. A multi-stage ladder-shaped valve cage 6 is arranged above the valve seat 4, and the multi-stage ladder-shaped valve cage 6 is sleeved on the outside of the valve disc 7 and pressed against the valve seat 4. The inner cavity of the valve disc 7 is provided with a groove, and the valve disc 7 is connected to the upper valve stem 9 through the inner cavity and the groove. The cage wall of the multi-stage ladder-shaped valve cage 6 is evenly provided with a plurality of guide holes of the same specification along the circumferential direction. The lowest guide hole is higher than the sealing surface of the valve seat 4, so that the multi-stage trapezoidal valve cage 6 protects the sealing surface of the valve seat 4 to form the first anti-scour layer. A sealing ball convex is arranged at the center below the valve disc 7, and a circle of downward ring convex is arranged on the outer periphery of the sealing ball convex. The valve seat 4 is provided with a ball concave and a ring concave corresponding to the sealing ball convex and the ring convex, and the ring convex is the second anti-scour layer. A pressure plate 8 is arranged above the multi-stage trapezoidal valve cage 6, and a valve cover 10 is arranged above the pressure plate 8. A self-sealing ring is arranged between the valve cover 10 and the valve body 1. The valve cover 10 is bolted and fixed to the valve body 1, and the valve stem 9 is vertically slidably connected to the valve cover 10. The top of the valve stem 9 passes through the valve cover 10, and the top of the valve stem 9 is a connector for connecting with pneumatic, electric, and manual actuators.

[0021] The top end of the valve disc 7 is higher than the multi-step trapezoidal valve cage 6 .

[0022] Magic block type step-down hidden spherical seal regulating valve, when in use:

[0023] The lifting and lowering of the valve stem 9 is controlled by an additional actuator, thereby controlling the lifting and opening and closing of the valve disc 7; the design height of the guide hole of the multi-stage trapezoidal valve cage 6 makes the bottom of the guide hole higher than the sealing surface of the valve seat 4. When the valve is opened, since the bottom of the guide hole of the multi-stage trapezoidal valve cage 6 is higher than the sealing surface of the valve seat 4, on the one hand, it can avoid the direct erosion of the sealing surface of the valve seat 4 by the fluid medium, and on the other hand, it can prevent impurities in the medium from getting stuck on the sealing surface of the valve seat 4. At the same time, the valve core can also prevent the fluid medium from directly eroding the sealing surface of the valve core due to the annular convex protective layer; when the valve is closed, the sealing surface of the valve disc 7 is tightly matched with the sealing surface of the valve seat 4, and the annular convex protective layer on the outer ring of the bottom surface of the valve disc 7 blocks the sealing surface of the valve disc 7 and the valve seat 4, which will prevent the medium fluid from eroding the spherical seal of the valve disc 7 and the sealing surface of the valve seat 4.

[0024] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A magic block type pressure-reducing hidden spherical sealing regulating valve comprises a valve body, wherein the valve body has a valve cavity, and the valve cavity is divided into a liquid inlet cavity relatively above and a liquid outlet cavity relatively below, and is characterized in that: A valve seat is arranged between the liquid inlet cavity and the liquid outlet cavity, and a multi-stage trapezoidal valve cage is arranged above the valve seat. The multi-stage trapezoidal valve cage is sleeved outside the valve disc and pressed against the valve seat. The inner cavity of the valve disc is provided with a groove, and the valve disc is connected to the valve stem above through the inner cavity and the groove. The cage wall of the multi-stage trapezoidal valve cage is evenly provided with several guide holes of the same specification along the circumferential direction, and the lowest guide hole is higher than the sealing surface of the valve seat. A sealing ball convex is arranged at the center below the valve disc, and a circle of downward ring convex is arranged on the outer periphery of the sealing ball convex. The valve seat is provided with ball concave and ring concave corresponding to the sealing ball convex and ring convex. A pressure plate is arranged above the multi-stage trapezoidal valve cage, and a valve cover is arranged above the pressure plate. The valve stem and the valve cover are vertically slidably connected.

2. The magic block type pressure reducing hidden spherical sealing regulating valve according to claim 1 is characterized in that: The valve seat is connected to a pressure reducing sleeve at the bottom. The pressure reducing sleeve is in the shape of a cylinder with a sealed bottom, and a plurality of holes are arranged on the cylinder wall.

3. The magic block type pressure reducing hidden spherical sealing regulating valve according to claim 1 is characterized in that: A sealing gasket is provided between the valve seat and the valve body.

4. The magic block type pressure reducing hidden spherical sealing regulating valve according to claim 1 is characterized in that , a self-sealing ring is provided between the valve cover and the valve body.

5. The magic block type pressure reducing hidden spherical sealing regulating valve according to claim 1 is characterized in that , the top of the valve disc is higher than the multi-stage trapezoidal valve cage.

6. The magic block type pressure reducing hidden spherical sealing regulating valve according to claim 1 is characterized in that The top of the valve stem passes through the valve cover, and the top of the valve stem is a connector for connecting to pneumatic, electric, or manual actuators.

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