Anti-scouring sealing structure of valve

Abstract

The utility model relates to a valve anti-scour sealing structure which comprises a valve seat, a valve core and a sealing ring, a through hole is formed in the middle of the valve seat, a sealing boss is arranged on the valve seat on the outer side of the upper end of the through hole, and an inclined sealing surface is arranged on the outer side of the sealing boss; a sleeve is arranged on the outer side of the upper end of the valve seat and provided with a water through hole. The valve element is installed in the sleeve in a sliding mode, a sealing protruding ring capable of being matched with the sealing boss is arranged on the outer side of the lower end of the valve element, and a diagonal plane capable of being matched with the sealing face is arranged on the inner side of the sealing protruding ring. A sealing ring capable of being matched with the valve element is arranged in the lower end of the sleeve. According to the built-in sealing structure, the sealing position of the valve is protected, a pressure medium can be prevented from directly washing the sealing face of the valve element when the valve is opened in a small state, and the service life of the valve can be prolonged through the flow guide face; the whole structure is simple, multiple seals are arranged to prevent leakage, and the device can well adapt to high-pressure and high-temperature working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of governing valve especially relates to a valve anti-scouring sealing structure. BACKGROUND

[0002] The governing valve is a commonly used valve, under the high pressure difference high flow rate working condition, the medium occurs cavitation and flash evaporation working condition in the pressure reducing process, the occurrence position is at the sealing position of the valve core and the valve seat, because the flow area between the two is minimum, is in the pressure reduction concentration point, is easy to cavitate and flash evaporate, thereby destroys the sealing surface of the valve core and the valve seat leads to the valve leakage and influences the use effect of the valve. SUMMARY

[0003] In view of the prior art deficiency, the utility model provides a valve anti-scouring sealing structure capable of protecting the sealing position of the valve.

[0004] The utility model discloses a technical scheme that adopts the following technical scheme to solve the above technical problem:

[0005] A valve anti-scouring sealing structure, comprising:

[0006] The valve seat is provided with a sealing boss on the outer side of the upper end of the through hole, and the outer side of the sealing boss is provided with an inclined sealing surface; a sleeve is arranged on the outer side of the upper end of the valve seat, and a water through hole is formed in the sleeve;

[0007] The valve core is slidably installed in the sleeve, and the outer side of the lower end of the valve core is provided with a sealing convex ring capable of cooperating with the sealing boss, and the inner side of the sealing convex ring is provided with an inclined surface capable of cooperating with the sealing surface;

[0008] The inner side of the lower end of the sleeve is provided with a sealing ring capable of cooperating with the valve core.

[0009] Preferably, the outer side of the valve seat is provided with a stepped surface, the lower end of the sleeve is provided with a positioning boss capable of cooperating with the step, and a sealing ring is arranged between the stepped surface and the positioning boss.

[0010] Preferably, the lower end of the sealing surface is provided with an outwardly and downwardly expanding flow guide surface.

[0011] Preferably, the sealing surface and the inclined surface are respectively sprayed with a titanium nitride coating.

[0012] Preferably, the inner side of the lower end of the sleeve is provided with a sealing groove, and the sealing ring is fixedly installed in the sealing groove.

[0013] Preferably, the outer side of the lower end of the valve core is provided with a rounded corner.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The utility model discloses a sealing structure of valve anti -scouring, including valve seat 1, valve core 7 and sealing ring 10, the valve seat 1 is provided with sleeve 5, sleeve 5 is provided with valve core 7 in it, the sleeve 5 is provided with sealing groove 15 in the outer side of the upper end, and the sealing groove 15 is provided with the sealing ring 10 in the inner side. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model.

[0017] Figure 2 It is Figure 1 The enlarged schematic view of A place in the middle.

[0018] In the drawing: 1, valve seat;2, through -hole;3, sealing boss;4, sealing surface;5, sleeve;6, water hole;7, valve core;8, sealing convex ring;9, bevel surface;10, sealing ring;11, step surface;12, positioning boss;13, sealing ring;14, flow guide surface;15, sealing groove;17, round off. DETAILED DESCRIPTION

[0019] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings.

[0020] The embodiment proposes a valve anti -scouring sealing structure, including valve seat 1, valve core 7 and sealing ring 10, the valve seat 1 is provided with sleeve 5, sleeve 5 is provided with valve core 7 in it;

[0021] As Figures 1-2 Shown, the valve seat 1 middle part is provided with through -hole 2, and when valve core 7 opens, medium can flow from through -hole 2;

[0022] The outer side of the upper end of through -hole 2 of valve seat 1 is provided with sealing boss 3, and the outer side of sealing boss 3 is provided with inclined sealing surface 4;

[0023] The upper end of valve seat 1 is provided with sleeve 5, and water hole 6 is set up in sleeve 5, and when valve core 7 opens, medium can enter through -hole 2 from water hole 6;

[0024] Valve core 7 is slidably installed in sleeve 5, and the outer side of the lower end of valve core 7 is provided with sealing convex ring 8 that can be matched with sealing boss 3, and the inner side of sealing convex ring 8 is provided with bevel surface 9 that can be matched with sealing surface 4, when valve core 7 slides upward, valve opens, when the opening degree of valve is smaller, sealing convex ring 8 can cover bevel surface 9 and sealing surface 4, form protection, and high-pressure medium will not directly impact the bevel surface 9 for sealing of valve core 7;

[0025] The lower end of the sleeve 5 is internally provided with a sealing ring 10 capable of cooperating with the valve core 7, and the sealing ring 10 is used to improve the sealing effect between the valve core 7 and the sleeve 5.

[0026] Further, the outer side of the valve seat 1 is provided with a stepped surface 11, and the lower end of the sleeve 5 is provided with a positioning boss 12 capable of cooperating with the step, so that the sleeve 5 and the valve seat 1 are facilitated to be assembled and stable when the positioning boss 12 cooperates with the stepped surface 11; and a sealing ring 13 is arranged between the stepped surface 11 and the positioning boss 12, so that the sleeve and the valve seat 1 are better sealed and will not leak.

[0027] Further, the lower end of the sealing surface 4 is provided with a flow guide surface 14 expanding outward and downward, and the flow guide surface 14 guides the medium flow and reduces the impact.

[0028] Further, the sealing surface 4 and the chamfered surface 9 are respectively sprayed with a titanium nitride coating, and the titanium oxide coating makes the strength of the sealing surface 4 and the chamfered surface 9 higher, and increases the service life.

[0029] Further, the lower end of the sleeve 5 is internally provided with a sealing groove 15, and the sealing ring 13 is fixedly installed in the sealing groove 15, the sealing groove 15 is recessed inward, so as to avoid the sealing ring 13 being too protruding, and the sealing ring 13 will not be damaged when the valve core 7 moves downward.

[0030] Further, the lower end of the valve core 7 is provided with a rounded corner 17, and the rounded corner 17 can avoid the valve core 7 directly impacting the sealing ring 13 when descending.

[0031] Working principle: the utility model discloses the sealing part of valve core 7 and valve seat 1 is arranged into the built-in structure, and the cooperation sealing between the sealing convex ring 8 of the lower end of valve core 7 and the sealing boss 3 on valve seat 1 is formed, when the ascending degree of valve core 7 is small, the medium with pressure will not directly impact the chamfered surface 9 of valve core 7 and the sealing surface 4 of valve seat 1, and a part of pressure can be unloaded through the guidance of flow guide surface 14, and the sealing structure of valve is formed certain protection.

[0032] It can be understood that the above implementation is only an exemplary embodiment for illustrating the principle of the utility model, and the utility model is not limited to this. For ordinary skilled persons in the art, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also regarded as the protection scope of the utility model.

Claims

1. A valve anti-erosion sealing structure, characterized in that it comprises: A valve seat (1) is provided with a through hole (2) in the middle. A sealing boss (3) is provided on the valve seat (1) on the outer side of the upper end of the through hole (2). An inclined sealing surface (4) is provided on the outer side of the sealing boss (3). A sleeve (5) is provided on the outer side of the upper end of the valve seat (1). A water passage hole (6) is provided on the sleeve (5). Valve core (7), the valve core (7) is slidably installed in sleeve (5), and a sealing ring (8) that can cooperate with the sealing boss (3) is provided on the outer side of the lower end of the valve core (7). A chamfered surface (9) that can cooperate with the sealing surface (4) is provided on the inner side of the sealing ring (8). A sealing ring (10) is provided inside the lower end of the sleeve (5) to cooperate with the valve core (7).

2. The valve anti-erosion sealing structure according to claim 1, characterized in that, The valve seat (1) has a stepped surface (11) on its outer side, and the lower end of the sleeve (5) has a positioning boss (12) that can cooperate with the step. A sealing ring (13) is provided between the stepped surface (11) and the positioning boss (12).

3. The valve anti-erosion sealing structure according to claim 1, characterized in that, The lower end of the sealing surface (4) is provided with a downward and outward expanding guide surface (14).

4. The valve anti-erosion sealing structure according to claim 1, characterized in that, Titanium nitride coatings are sprayed onto the sealing surface (4) and the beveled surface (9), respectively.

5. The valve anti-erosion sealing structure according to claim 1, characterized in that, A sealing groove (15) is provided on the inner side of the lower end of the sleeve (5), and the sealing ring (13) is fixedly installed in the sealing groove (15).

6. The valve anti-erosion sealing structure according to claim 1, characterized in that, The lower outer side of the valve core (7) is provided with a rounded edge (17).

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