High-temperature-resistant hard sealing eccentric semi-ball valve

Abstract

The utility model discloses a high temperature resistant hard seal eccentric half ball valve which comprises a main valve body and an auxiliary valve body which are distributed left and right and connected through a fastener, a valve core and a valve seat are arranged in the main valve body, and the valve seat is pressed on the spherical surface of the valve core and the end face of the auxiliary valve body. According to the utility model, the sealing assemblies are respectively arranged in the main valve body and the auxiliary valve body, and the springs pressed on the sealing assemblies are respectively arranged in the main valve body and the auxiliary valve body, so that bidirectional temperature self-compensation durable sealing is realized; the two-way spring compensation sealing is beneficial to uniform distribution of sealing force and guarantee of sealing performance of medium two-way flow pressure bearing, and sealing failure caused by thermal expansion of materials under the high-temperature working condition is overcome; the Stellite6 alloy layer is overlaid on the matching surface of the valve seat and the valve core, so that the wear resistance, the corrosion resistance and the oxidation resistance of the valve are improved, excellent thermal stability is provided, and the service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field especially relates to a high temperature resistant hard sealing eccentric half ball valve. BACKGROUND

[0002] The half ball valve is one kind of ball valve, compared with the conventional ball valve, the opening and closing part in the half ball valve is half ball type, and the opening and closing torque is smaller, and has the characteristics of wear resistance, erosion resistance, reliable sealing, and is widely used in the fields of electric power industry, petrochemical industry, sewage treatment and the like.

[0003] As shown in a kind of half ball valve of application No. CN202420352950. X, to improve sealing performance, currently generally in ball valve will be provided with spring that is pressed on sealing assembly to realize compensation function, however, the above-mentioned spring is mostly single-sided arrangement, and valve seat is prone to deflection phenomenon after long-term use, affect sealing effect, in addition, the traditional metal sealing valve seat on the market currently due to the difference in thermal expansion coefficient is prone to sealing gap, leading to high temperature leakage, therefore needs to be improved. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of prior art, the utility model provides a high temperature resistant hard sealing eccentric half ball valve to solve the problems mentioned in the above background art.

[0005] The utility model provides the following technical scheme: a high temperature resistant hard sealing eccentric half ball valve, including left and right distribution and being connected by fastener main valve body and auxiliary valve body, the main valve body is equipped with valve core and valve seat, the main valve body and the auxiliary valve body are equipped with left side ring groove and right side ring groove respectively in the end face of mutual approach, the valve seat is pressed on the spherical surface of the valve core and the end face of the auxiliary valve body, and the valve seat extends to the auxiliary valve body, left side sealing assembly is arranged in the left side ring groove and is attached to the valve seat, right side sealing assembly is arranged in the right side ring groove and is attached to the valve seat.

[0006] The bottom surface of the left side ring groove and the right side ring groove is respectively provided with a plurality of mounting holes at equal angles, and the left and right mounting holes are respectively provided with springs pressed on the left side sealing assembly and the right side sealing assembly.

[0007] Preferably, the left side sealing assembly includes a left blocking ring and a first sealing ring attached to the valve seat and the curved surface of the left side ring groove, the left blocking ring and the first sealing ring are attached to each other, and the spring is pressed on the left end surface of the left blocking ring.

[0008] Preferably, the right sealing assembly comprises a right blocking ring and a second sealing ring which are arranged in the right annular groove and abut against the valve seat and the curved surface of the right annular groove, the right blocking ring and the second sealing ring abut against each other, and the spring is pressed against the right end surface of the right blocking ring.

[0009] Preferably, the first sealing ring and the second sealing ring are both conical sealing rings, so that the contact surfaces of the right blocking ring and the second sealing ring, the contact surface between the second sealing ring and the valve seat, the contact surface between the left blocking ring and the first sealing ring, and the contact surface between the first sealing ring and the valve seat are all conical surfaces.

[0010] Preferably, the right end surface of the main valve body is integrally formed with a convex ring, and the left end surface of the auxiliary valve body is provided with a sealing ring groove for accommodating the convex ring.

[0011] Preferably, the sealing ring groove is further provided with a third sealing ring which is pressed by the convex ring.

[0012] Preferably, the first sealing ring and the second sealing ring are both conical graphite sealing rings.

[0013] Preferably, the valve seat and the mating surface of the valve core are stacked with a Stellite 6 alloy layer.

[0014] The utility model provides a kind of high-temperature-resistant hard sealing eccentric half-ball valve, with the following beneficial effects:

[0015] The utility model is provided with sealing assembly in main valve body and auxiliary valve body respectively, and the main valve body and auxiliary valve body in the utility model are provided with spring pressed in sealing assembly respectively, realize the persistent sealing of bidirectional temperature self-compensation, and bidirectional spring compensation sealing is beneficial to the uniform distribution of sealing force and the sealing performance of guaranteeing bidirectional flow pressure-bearing of medium, and overcome the sealing failure caused by material thermal expansion under high-temperature working condition;

[0016] The utility model is provided with Stellite 6 alloy layer on the valve seat and the mating surface of the valve core, improves its wear resistance, corrosion resistance and antioxidant property, and provides excellent thermal stability, improves the service life of the utility model. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model;

[0018] Figure 2 It is Figure 1 the enlarged schematic diagram of A in the figure.

[0019] In the figure:

[0020] 11, main valve body; 12, sub valve body; 13, valve seat; 14, mounting hole; 22, left check ring; 23, No. 1 sealing ring; 32, right check ring; 33, No. 2 sealing ring; 41, convex ring; 42, No. 3 sealing ring. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0024] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Reference Figures 1-2According to the embodiment of the utility model a kind of high-temperature-resistant hard sealing eccentric half-ball valve, including left and right distribution and being connected by fastener main valve body 11 and auxiliary valve body 12, the valve core and valve seat 13 are housed in the main valve body 11, the end face of the main valve body 11 and the auxiliary valve body 12 are respectively provided with left side ring groove and right side ring groove, the valve seat 13 is pressed on the spherical surface of the valve core and the end face of the auxiliary valve body 12, and the valve seat 13 extends into the auxiliary valve body 12, left side sealing assembly is provided in the left side ring groove and attached to the valve seat 13, right side sealing assembly is provided in the right side ring groove and attached to the valve seat 13, and then sealing is carried out to avoid leakage.

[0026] Furthermore, in order to improve the sealing effect, a plurality of mounting holes 14 are provided in the bottom surface of the left and right side ring grooves at equal angles, and springs are mounted in the left and right mounting holes 14 and pressed on the left and right side sealing assemblies.

[0027] Specifically, the left side sealing assembly includes a left retainer ring 22 and a first sealing ring 23 mounted in the left side ring groove and attached to the valve seat 13 and the curved surface of the left side ring groove, the left retainer ring 22 and the first sealing ring 23 are attached to each other, and the spring is pressed on the left end surface of the left retainer ring 22.

[0028] The right side sealing assembly includes a right retainer ring 32 and a second sealing ring 33 mounted in the right side ring groove and attached to the valve seat 13 and the curved surface of the right side ring groove, the right retainer ring 32 and the second sealing ring 33 are attached to each other, and the spring is pressed on the right end surface of the right retainer ring 32.

[0029] In this embodiment, the spring provides initial pre-tightening force and compensates for axial displacement, which makes the components in the left and right side sealing assemblies fit more closely and improves the sealing effect.

[0030] The left retainer ring 22 and the right retainer ring 32 provide auxiliary sealing and uniform distribution of spring pre-tightening force, and the auxiliary sealing means that the high-temperature-resistant hard sealing eccentric half-ball valve mainly realizes sealing effect through the first sealing ring 23 and the second sealing ring 33, and the left retainer ring 22 and the right retainer ring 32 can be attached to the first sealing ring 23 and the second sealing ring 33 to increase the sealing surface and provide auxiliary sealing effect.

[0031] Further, the first sealing ring 23 and the second sealing ring 33 can be conical sealing rings, so that the contact surface between the right retainer ring 32 and the second sealing ring 33, the contact surface between the second sealing ring 33 and the valve seat 13, the contact surface between the left retainer ring 22 and the first sealing ring 23, and the contact surface between the first sealing ring 23 and the valve seat 13 are all conical surfaces, so as to increase the sealing area, and the conical angle of the sealing structure can provide better self-locking and self-sealing capabilities, in addition, through the conical design, the spring can also play a radial gap compensation function, realize the long-term sealing of bidirectional temperature self-compensation, and overcome the sealing failure caused by material thermal expansion under high temperature working conditions.

[0032] The first sealing ring 23 and the second sealing ring 33 are conical graphite sealing rings, specifically, the first sealing ring 23 and the second sealing ring 33 adopt impregnated antimony graphite composite materials, which can significantly improve the lubricity of the materials and reduce the friction coefficient, under high temperature, pure graphite may face the problem of accelerated wear, and the addition of antimony can effectively alleviate the problem and improve the sealing life, and the design of multiple springs can improve the uniformity of stress, adapt to thermal deformation, enhance reliability, and provide fine control capability, and significantly improve the performance and life of the graphite seal.

[0033] In addition, the right end face of the main valve body 11 is integrally formed with a convex ring 41, the left end face of the auxiliary valve body 12 is provided with a sealing ring groove for accommodating the convex ring 41, and the sealing ring groove is also provided with a third sealing ring 42 which is pressed by the convex ring 41, so as to achieve a multiple sealing effect.

[0034] It should be additionally explained that the main valve body 11 is provided with an opening and closing assembly for controlling the angle of the valve core, which is a conventional setting in the prior art, and will not be described here.

[0035] The valve seat 13 and the valve core mating surface are stacked with a Stellite6 alloy layer, which can improve the wear resistance, corrosion resistance and oxidation resistance, and provide excellent thermal stability.

[0036] The above only describes specific embodiments of the present application, but the technical features of the present application are not limited thereto, and any person skilled in the art can make changes or modifications in the field of the present application, which are all covered in the patent scope of the present application.

Claims

1. A high-temperature-resistant hard-seal eccentric half-spherical valve, comprising a main valve body (11) and a secondary valve body (12) which are distributed left and right and connected by fasteners, characterized in that: The main valve body (11) is internally provided with a valve core and a valve seat (13), the end faces of the main valve body (11) and the auxiliary valve body (12) are respectively provided with left and right annular grooves, the valve seat (13) is pressed against the spherical surface of the valve core and the end face of the auxiliary valve body (12), and the valve seat (13) extends into the auxiliary valve body (12), the left annular groove is provided with a left sealing assembly abutting against the valve seat (13), and the right annular groove is provided with a right sealing assembly abutting against the valve seat (13). A plurality of mounting holes (14) are equiangularly arranged in the bottom faces of the left and right annular grooves, and springs are respectively arranged in the left and right mounting holes (14) and pressed against the left and right sealing assemblies.

2. A high temperature resistant hard sealing eccentric half ball valve according to claim 1, characterized in that: The left sealing assembly comprises a left retainer ring (22) and a first sealing ring (23) arranged in the left annular groove and abutting against the valve seat (13) and the curved surface of the left annular groove, the left retainer ring (22) and the first sealing ring (23) abut against each other, and the spring is pressed against the left end face of the left retainer ring (22).

3. A high temperature resistant hard sealing eccentric half ball valve according to claim 2, characterized in that: The right sealing assembly comprises a right retainer ring (32) and a second sealing ring (33) arranged in the right annular groove and abutting against the valve seat (13) and the curved surface of the right annular groove, the right retainer ring (32) and the second sealing ring (33) abut against each other, and the spring is pressed against the right end face of the right retainer ring (32).

4. A high temperature resistant hard sealing eccentric half ball valve according to claim 3, characterized in that: The first and second sealing rings (23, 33) are both tapered sealing rings, so that the contact faces of the right retainer ring (32) and the second sealing ring (33), the contact face between the second sealing ring (33) and the valve seat (13), the contact face between the left retainer ring (22) and the first sealing ring (23), and the contact face between the first sealing ring (23) and the valve seat (13) are all tapered.

5. A high temperature resistant hard sealing eccentric half ball valve according to claim 1, characterized in that: The right end face of the main valve body (11) is integrally provided with a convex ring (41), and the left end face of the auxiliary valve body (12) is provided with a sealing ring groove for accommodating the convex ring (41).

6. A high temperature resistant hard sealing eccentric half ball valve according to claim 5, characterized in that: The sealing ring groove is further provided with a third sealing ring (42) pressed by the convex ring (41).

7. A high temperature resistant hard sealing eccentric half ball valve according to claim 4, characterized in that: The first and second sealing rings (23, 33) are both tapered graphite sealing rings.

8. A high temperature resistant hard sealing eccentric half ball valve according to claim 1, characterized in that: The mating face between the valve seat (13) and the valve core is provided with a Stellite6 alloy layer.

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