Cage type regulating valve

Abstract

The utility model discloses a cage type regulating valve which comprises a valve body, a valve cover, a valve element assembly arranged in the valve body and a sealing assembly for sealing the valve element assembly. The sealing assembly comprises an upper valve cage arranged in the valve body, a lower valve cage arranged in the valve body and a sealing ring arranged between the upper valve cage and the lower valve cage. The upper surface of the sealing ring is an inclined surface, the sealing ring is matched with the inclined surface of the upper valve cage through the inclined surface, and the matching part of the lower valve cage and the sealing ring is a combined surface of a horizontal surface and a downwards inclined inclined surface. Through the sealing assembly composed of the upper valve cage, the lower valve cage and the sealing ring and the design that the horizontal plane of the lower valve cage is combined with the inclined plane inclining downwards, the sealing ring expands in the high-temperature environment, and sealing of the upper valve cage and the lower valve cage is achieved; the purposes of improving the sealing effect of the cage type regulating valve, reducing abrasion to the sealing piece and prolonging the service life of the cage type regulating valve are achieved.

Description

Technical Field

[0001] The utility model relates to the field of production and manufacturing of valve bodies, and particularly relates to a cage type control valve. Background Art

[0002] In the current production and use process of valve bodies, the flexible graphite rings with rectangular cross-sections are generally used as sealing rings in the cage type control valves on the market under high-temperature working conditions. When using this kind of sealing ring, the valve core uses a pressing plate to fix it. To achieve sealing, it needs to be pressed tightly to generate a sealing force. When the pressing force of the flexible graphite sealing ring is insufficient, it is easy to cause internal leakage of the valve. If it is pressed too tightly, it will generate a large frictional force, resulting in slow valve movement.

[0003] How to effectively solve the above technical problems is an urgent technical problem that needs to be solved by those skilled in the art at the present stage. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a cage type control valve to improve the sealing effect of the cage type control valve, reduce the wear of the sealing parts, and extend the service life of the cage type control valve.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A cage type control valve includes a valve body, a valve cover, a valve core assembly arranged in the valve body, and a sealing assembly for sealing the valve core assembly;

[0007] The sealing assembly includes an upper valve cage arranged in the valve body, a lower valve cage arranged in the valve body, and a sealing ring arranged between the upper valve cage and the lower valve cage; the upper surface of the sealing ring is an inclined surface, the sealing ring is matched with the inclined surface of the upper valve cage through the inclined surface, the matching part of the lower valve cage and the sealing ring is a combined surface of a horizontal plane and an inclined surface sloping downward, and the horizontal plane in the combined surface is matched with the bottom of the sealing ring.

[0008] The utility model uses a sealing assembly composed of an upper valve cage, a lower valve cage and a sealing ring. Through the design of the combination of the horizontal plane and the inclined surface sloping downward of the lower valve cage, the sealing ring expands in a high-temperature environment to realize the sealing between the upper and lower valve cages, so as to achieve the purpose of improving the sealing effect of the cage type control valve, reducing the wear of the sealing parts, and extending the service life of the cage type control valve.

[0009] It is further noted that the valve body and the valve cover are fixedly connected by screw holes arranged on the valve body and the valve cover and fasteners matched with the screw holes.

[0010] Further, it is worth noting that the spool assembly includes a valve stem and a spool disposed at the bottom end of the valve stem. The bottom end of the valve stem passes through the valve stem and is disposed within the valve body. The spool is disposed at the bottom end of the valve stem, and the side wall of the spool is in close contact with the inner wall of the upper valve cage. The spool moves up and down along the inner wall of the upper valve cage under the action of the valve stem.

[0011] Further, it is worth noting that a packing member is disposed between the valve stem and the valve cover. A packing gland is disposed at the top of the cover body, and the top end of the valve stem passes through the packing gland and is placed outside.

[0012] Further, it is worth noting that a serrated gasket is disposed between the valve cover and the upper valve cage.

[0013] Further, it is worth noting that a valve seat is disposed inside the valve body, and a winding body is disposed between the valve seat and the valve body. When the spool is at the lowest position, it contacts the valve seat.

[0014] Further, it is worth noting that the sealing ring is made of flexible graphite.

[0015] The utility model has the following advantages:

[0016] 1. Through the sealing assembly composed of the upper valve cage, the lower valve cage and the sealing ring, and through the design of combining the horizontal plane of the lower valve cage with the downward inclined slope, the sealing ring expands in a high-temperature environment, realizing the sealing between the upper and lower valve cages, achieving the purpose of improving the sealing effect of the cage-type control valve, reducing the wear of the sealing parts, and extending the service life of the cage-type control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0018] Figure 1 It is a schematic structural diagram of a cage-type control valve disclosed in an embodiment of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of a sealing assembly in a cage-type control valve disclosed in an embodiment of the present utility model;

[0020] The corresponding component names represented by the numbers and letters in the figure:

[0021] 1. Valve body 2. Valve cover 31. Valve stem 32. Spool 4. Sealing assembly 41. Upper valve cage 42. Lower valve cage

[0022] 43. Sealing ring 5. Fastener 6. Serrated gasket 7. Packing member 8. Packing gland 9. Valve seat

[0023] 10. Winding body. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] The present invention provides a cage-type regulating valve, and its working principle is that through a sealing component composed of an upper valve cage, a lower valve cage and a sealing ring, through the design of combining the horizontal plane of the lower valve cage with an inclined plane sloping downward, the sealing ring expands in a high-temperature environment to achieve the sealing of the upper and lower valve cages, so as to achieve the purpose of improving the sealing effect of the cage-type regulating valve, reducing the wear of the sealing parts and extending the service life of the cage-type regulating valve.

[0026] The present invention will be further described in detail below in conjunction with the embodiments and specific implementation modes.

[0027] As Figure 1 and Figure 2 shown, a cage-type regulating valve includes a valve body 1, a valve cover 2, a valve core assembly arranged in the valve body, and a sealing component 4 for sealing the valve core assembly.

[0028] The valve body and the valve cover are fixedly connected by screw holes provided in the valve body and the valve cover and fasteners 5 matching the screw holes.

[0029] The sealing component includes an upper valve cage 41 arranged in the valve body, a lower valve cage 42 arranged in the valve body, and a sealing ring 43 made of flexible graphite arranged between the upper valve cage and the lower valve cage; the upper surface of the sealing ring is an inclined plane, the sealing ring is matched with the inclined plane of the upper valve cage through the inclined plane, the matching part of the lower valve cage and the sealing ring is a combined surface of a horizontal plane and an inclined plane sloping downward, and the horizontal plane in the combined surface is matched with the bottom of the sealing ring. A toothed gasket 6 is arranged between the valve cover and the upper valve cage. Since the combined surface of the lower valve cage is a combination of a horizontal plane and an inclined plane, in a high-temperature or high-pressure environment, the sealing ring expands to achieve the sealing of the upper valve cage and the lower valve cage, and the existence of the inclined plane provides a region for the expansion of the sealing ring, so that the sealing effect is better.

[0030] The valve core assembly includes a valve stem 31 and a valve core 32 arranged at the bottom end of the valve stem. The bottom end of the valve stem passes through the valve stem and is arranged in the valve body; the valve core is arranged at the bottom end of the valve stem, and the side wall of the valve core is closely attached to the inner wall of the upper valve cage, and the valve core moves up and down along the inner wall of the upper valve cage under the action of the valve stem.

[0031] A packing member 7 is arranged between the valve stem and the valve cover, a packing gland 8 is arranged at the top of the cover body, and the top end of the valve stem passes through the packing gland and is placed outside.

[0032] A valve seat 9 is arranged inside the valve body, and a winding body 10 is arranged between the valve seat and the valve body; when the valve core is at the lowest end, it contacts the valve seat.

[0033] Through the above method, a cage type control valve provided by the utility model, through a sealing assembly composed of an upper valve cage, a lower valve cage and a sealing ring, and through the design of combining the horizontal plane of the lower valve cage with an inclined plane sloping downward, enables the sealing ring to expand in a high-temperature environment, realizes the sealing between the upper and lower valve cages, and achieves the purpose of improving the sealing effect of the cage type control valve, reducing the wear of the sealing parts and prolonging the service life of the cage type control valve.

[0034] The above is only the preferred embodiment of a cage type control valve disclosed by the utility model. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model.

Claims

1. A cage type control valve, characterized in that, It includes a valve body, a valve cover, a valve core assembly arranged in the valve body, and a sealing assembly for sealing the valve core assembly; The sealing assembly includes an upper valve cage arranged in the valve body, a lower valve cage arranged in the valve body, and a sealing ring arranged between the upper valve cage and the lower valve cage; the upper surface of the sealing ring is an inclined surface, the sealing ring is matched with the inclined surface of the upper valve cage through the inclined surface, the matching part of the lower valve cage and the sealing ring is a combined surface of a horizontal plane and an inclined surface inclined downward, and the horizontal plane in the combined surface is matched with the bottom of the sealing ring.

2. The cage type control valve according to claim 1, characterized in that, The valve body and the valve cover are fixedly connected through screw holes arranged on the valve body and the valve cover and fasteners matched with the screw holes.

3. A cage-type control valve according to claim 1, characterized in that, The valve core assembly includes a valve rod and a valve core arranged at the bottom end of the valve rod, the bottom end of the valve rod passes through the valve rod and is arranged in the valve body; the valve core is arranged at the bottom end of the valve rod, and the side wall of the valve core is closely attached to the inner wall of the upper valve cage, and the valve core moves up and down along the inner wall of the upper valve cage under the action of the valve rod.

4. The cage control valve according to claim 3, characterized in that, A packing member is arranged between the valve rod and the valve cover, a packing gland is arranged at the top of the valve cover, and the top end of the valve rod passes through the packing gland and is placed outside.

5. A cage type control valve according to claim 1, characterized in that, A serrated gasket is arranged between the valve cover and the upper valve cage.

6. The cage type regulating valve according to claim 3, characterized in that, A valve seat is arranged inside the valve body, and a winding body is arranged between the valve seat and the valve body; when the valve core is at the lowest end, it contacts the valve seat.

7. A cage type control valve according to claim 1, characterized in that, The sealing ring is made of flexible graphite.

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