Novel soft sealing ball valve

Abstract

The embodiment of the utility model provides a novel soft sealing ball valve which comprises a valve body, a valve cavity is formed in the valve body, an O-shaped valve ball is installed in the valve cavity, valve seats are arranged on the two sides of the O-shaped valve ball, each valve seat comprises a tubular moving part, the outer wall of each tubular moving part is attached to the wall of a channel of the inner cavity of the valve body, and the outer wall of each tubular moving part is attached to the wall of the channel of the inner cavity of the valve body. One end of the tubular moving part is in contact fit with the O-shaped valve ball, and a force applying mechanism is installed at the other end of the tubular moving part and applies force pointing to the O-shaped valve ball to the tubular moving part. According to the novel soft sealing ball valve, the valve seats are arranged on the two sides of the O-shaped valve ball, the valve seats are close to the O-shaped valve ball under the action of the force application piece, and sealing is achieved; when the valve seat is abraded, the valve seat moves towards the O-shaped valve ball to keep the sealing state between the valve seat and the O-shaped valve ball; therefore, the wear-resistant effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball valves, and particularly relates to a novel soft-sealed ball valve. Background Art

[0002] The ball valve drives the rotation of the valve ball through the valve stem to control the flow of the medium in the pipeline, and is mainly applied in the fields of petrochemical industry, coal chemical industry, pipeline transportation, municipal engineering, etc.

[0003] The main seal of the ball valve is between the ball and the valve seat. The ball valve using non-metallic material as the valve seat seal is called a soft-sealed ball valve. Compared with the hard-sealed ball valve with a metal valve seat, this kind of valve has low processing difficulty and small opening and closing torque. However, the soft-sealed ball valve is restricted by the valve seat material, and the valve seat is prone to wear under uneven stress, resulting in the sealing failure between the valve seat and the ball. Summary of the Utility Model

[0004] In view of the above problems existing in the prior art, the purpose of the embodiment of the present utility model is to provide a novel soft-sealed ball valve.

[0005] The technical solution adopted in the embodiment of the present utility model is a novel soft-sealed ball valve, including: a valve body, a valve cavity is arranged in the valve body, an O-shaped valve ball is installed in the valve cavity, valve seats are arranged on both sides of the O-shaped valve ball, the valve seat includes a tubular moving part, the outer wall of the tubular moving part fits with the inner wall of the valve cavity passage, one end of the tubular moving part is in contact and cooperation with the O-shaped valve ball, and a force applying mechanism is installed at the other end of the tubular moving part, and the force applying mechanism applies a force to the tubular moving part pointing to the O-shaped valve ball.

[0006] Further, the force applying mechanism includes a valve seat pressing ring and a force applying part, the force applying part is installed on the valve body, and the valve seat pressing ring is arranged at the end of the tubular moving part away from the O-shaped valve ball for contacting with the force applying part.

[0007] Further, the outer edge of the valve seat pressing ring fits with the inner wall of the valve cavity passage, a stepped part is constructed on the inner edge of the valve seat pressing ring close to the tubular moving part, a cutting part matching with the stepped part is constructed on the outer edge of the end of the tubular moving part close to the valve seat pressing ring, and the stepped part cooperates with the cutting part to insert the end of the tubular moving part close to the valve seat pressing ring into the valve seat pressing ring.

[0008] Further, the end face of the cutting part away from the valve seat pressing ring is constructed as an inclined plane, the included angle between the end face of the cutting part away from the valve seat pressing ring and the bottom face of the cutting part is greater than 90°, and a sealing ring is sleeved on the cutting part.

[0009] Further, a first annular groove is opened on the outer wall of the tubular moving part, and a first annular sealing ring is placed in the first annular groove.

[0010] Further, an inclined contact surface for cooperating with the O-shaped valve ball is formed on the inner edge of the end of the tubular moving member close to the O-shaped valve ball.

[0011] Further, a second annular groove is formed on the inclined contact surface of the end of the tubular moving member close to the O-shaped valve ball. The second annular groove is coaxially arranged with the tubular moving member. A second annular sealing ring matched with the second annular groove is installed in the second annular groove, and one side outer edge of the second annular sealing ring extends to the outside of the second annular groove.

[0012] Further, a mounting hole is formed at the bottom of the O-shaped valve ball. A fixed shaft matched with the mounting hole is installed in the valve cavity. The top end of the fixed shaft is inserted into the mounting hole, and a spherical support pad is fixedly connected to the top end of the fixed shaft.

[0013] Further, a shaft sleeve is sleeved on the fixed shaft, and the fixed shaft is connected to the hole wall of the mounting hole through the shaft sleeve.

[0014] Compared with the prior art, a novel soft-sealed ball valve proposed by the present technical solution realizes sealing by arranging valve seats on both sides of the O-shaped valve ball and making the valve seats lean towards the O-shaped valve ball under the action of the force-applying member; when the valve seats are worn, the valve seats move towards the O-shaped valve ball to maintain the sealing state between the valve seats and the O-shaped valve ball; thereby achieving the effect of wear resistance.

[0015] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present invention.

[0016] The overview of various implementations or examples of the technology described in the present invention is not an exhaustive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the drawings which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to explain the embodiments of the present invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended as an exhaustive or exclusive embodiment of the device or method.

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0019] Figure 2 is Figure 1 an enlarged view of part A of

[0020] Figure 3 For Figure 1 the enlarged view at position B of Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. Based on the described embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model pertains. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute positions of the objects being described change, the relative positional relationships may also change accordingly.

[0023] In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed descriptions of known functions and known components are omitted in the present utility model.

[0024] Embodiment 1

[0025] Referring to Figures 1 to 3 , an embodiment of the present utility model provides a novel soft-sealed ball valve, including: a valve body 1, a valve cavity is provided in the valve body 1, an O-shaped valve ball 2 is installed in the valve cavity, valve seats are arranged on both sides of the O-shaped valve ball 2, the valve seat includes a tubular moving member 3, the outer wall of the tubular moving member 3 fits against the inner cavity channel wall of the valve body 1, one end of the tubular moving member 3 is in contact and cooperation with the O-shaped valve ball 2, and a force-applying mechanism is installed at the other end of the tubular moving member 3, and the force-applying mechanism applies a force to the tubular moving member 3 towards the O-shaped valve ball 2. In this technical solution, by arranging valve seats on both sides of the O-shaped valve ball 2, the valve seats are pressed against the O-shaped valve ball 2 under the action of the force-applying member to achieve sealing; when the valve seats are worn, the valve seats move towards the O-shaped valve ball to maintain the sealing state between the valve seats and the O-shaped valve ball 2; thus achieving the effect of wear resistance, thereby extending the service life of the valve seats and reducing the replacement and maintenance cycle.

[0026] The force application mechanism includes a valve seat pressing ring 4 and a force application member 5. The force application member 5 is installed on the valve body 1. The valve seat pressing ring 4 is arranged at one end of the tubular moving member 3 away from the O-shaped valve ball 2 for contacting the force application member 5. The force application member 5 applies force to the tubular moving member 3 through the valve seat pressing ring 4, which helps the tubular moving member 3 to be uniformly stressed and avoids eccentric wear of the tubular moving member 3.

[0027] The outer edge of the valve seat pressing ring 4 fits with the inner cavity channel wall of the valve body 1. A stepped portion is formed on the inner edge of the valve seat pressing ring 4 on the side close to the tubular moving member 3. A cutting portion matching the stepped portion is formed on the outer edge of the tubular moving member 3 at one end close to the valve seat pressing ring 4. The stepped portion and the cutting portion cooperate to insert the end of the tubular moving member 3 close to the valve seat pressing ring 4 into the valve seat pressing ring 4. The cooperation of the stepped portion and the cutting portion is beneficial to simple installation.

[0028] The end face of the cutting portion away from the valve seat pressing ring 4 is configured as an inclined surface. The angle between the end face of the cutting portion away from the valve seat pressing ring 4 and the bottom surface of the cutting portion is greater than 90°. A sealing ring 6 is sleeved on the cutting portion. When in use, the end face of the valve seat pressing ring 4 presses the sealing ring 6. At the same time, the sealing ring 6 deforms towards the outer edge of the tubular moving member 3 under the guidance of the inclined surface formed on the end face of the cutting portion away from the valve seat pressing ring 4. The deformed sealing ring 6 presses and fits with the inner cavity channel wall of the valve body 1, which helps to improve the sealing effect.

[0029] To further enhance the sealing effect between the outer wall of the tubular moving member 3 and the inner cavity channel wall of the valve body 1, a first annular groove 7 is formed on the outer wall of the tubular moving member 3, and a first annular sealing ring 8 is placed in the first annular groove 7.

[0030] The inner edge of the end of the tubular moving member 3 close to the O-shaped valve ball 2 is configured with an inclined contact surface matching the O-shaped valve ball 2. The inclined contact surface increases the contact area between the tubular moving member 3 and the O-shaped valve ball 2, which helps to improve the sealing effect between the tubular moving member 3 and the O-shaped valve ball 2.

[0031] An installation hole 11 is formed at the bottom of the O-shaped valve ball 2. A fixed shaft 12 matching the installation hole 11 is installed in the valve cavity. The top end of the fixed shaft 12 is inserted into the installation hole 11, and a spherical support pad 13 is fixedly connected to the top end of the fixed shaft 12. A shaft sleeve 14 is sleeved on the fixed shaft 12, and the fixed shaft 12 is connected to the hole wall of the installation hole 11 through the shaft sleeve 14. A spherical support pad 13 is arranged between the fixed shaft 12 and the O-shaped valve ball 2 to support the sphere.

[0032] Embodiment 2

[0033] When the material of the tubular moving part 3 is metal, on the basis of Embodiment 1, a second annular groove 9 is formed in the inclined contact surface of the tubular moving part 3 near one end of the O-shaped valve ball 2. The second annular groove 9 is coaxially arranged with the tubular moving part 3. A second annular sealing ring 10 which is matched with the second annular groove 9 is installed in the second annular groove 9. One side outer edge of the second annular sealing ring 10 extends to the outside of the second annular groove 9. The second annular sealing ring 10 contacts the O-shaped valve ball 2, and the second annular sealing ring 10 is a wearing part.

[0034] In the above embodiment, the sealing ring 6 can be made of graphite material, the first annular sealing ring 8 can be made of rubber material, and the second annular sealing ring 10 can be made of PTFE material.

[0035] The above description is intended to be illustrative rather than restrictive, and those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of their aspects) can be used in combination with each other, and it is contemplated that these embodiments can be combined with each other in various combinations or permutations.

Claims

1. A new type of soft-sealed ball valve, comprising: A valve body (1), wherein a valve cavity is provided in the valve body (1), and an O-shaped valve ball (2) is installed in the valve cavity, characterized in that valve seats are provided on both sides of the O-shaped valve ball (2), and the valve seat comprises a tubular movable member (3), the outer wall of the tubular movable member (3) is in contact with the inner cavity channel wall of the valve body (1), one end of the tubular movable member (3) is in contact with the O-shaped valve ball (2), and a force applying mechanism is installed at the other end of the tubular movable member (3), and the force applying mechanism applies a force directed to the O-shaped valve ball (2) to the tubular movable member (3); The force-applying mechanism comprises a valve seat pressure ring (4) and a force-applying member (5), wherein the force-applying member (5) is mounted on the valve body (1), and the valve seat pressure ring (4) is arranged at an end of the tubular moving member (3) away from the O-shaped valve ball (2) for contacting the force-applying member (5); The outer edge of the valve seat pressure ring (4) is in contact with the inner cavity channel wall of the valve body (1); the inner edge of the valve seat pressure ring (4) close to the side of the tubular movable member (3) is configured with a stepped portion; the outer edge of the tubular movable member (3) close to one end of the valve seat pressure ring (4) is configured with a cutting portion that cooperates with the stepped portion; the stepped portion cooperates with the cutting portion so that the end of the tubular movable member (3) close to the valve seat pressure ring (4) is inserted into the valve seat pressure ring (4); the end surface of the cutting portion away from the valve seat pressure ring (4) is configured as an inclined surface, and the angle between the end surface of the cutting portion away from the valve seat pressure ring (4) and the bottom surface of the cutting portion is greater than 90°.

2. A new type of soft-sealed ball valve according to claim 1, characterized in that: A sealing ring (6) is sleeved on the cutting portion.

3. A new type of soft-sealed ball valve according to claim 1, characterized in that: A first annular groove (7) is provided on the outer wall of the tubular moving member (3), and a first annular sealing ring (8) is placed in the first annular groove (7).

4. A new type of soft-sealed ball valve according to claim 1, characterized in that: The inner edge of the end of the tubular moving part (3) close to one end of the O-shaped valve ball (2) is configured with an inclined contact surface that matches the O-shaped valve ball (2).

5. A new type of soft-sealed ball valve according to claim 4, characterized in that: A second annular groove (9) is provided on the inclined contact surface of the tubular movable member (3) at one end close to the O-shaped valve ball (2). The second annular groove (9) is coaxially arranged with the tubular movable member (3). A second annular sealing ring (10) matching with the second annular groove (9) is installed in the second annular groove (9), and an outer edge of one side of the second annular sealing ring (10) extends to the outside of the second annular groove (9).

6. A new type of soft-sealed ball valve according to claim 1, characterized in that: The bottom of the O-shaped valve ball (2) is provided with a mounting hole (11), a fixed shaft (12) matching the mounting hole (11) is installed in the valve cavity, the top end of the fixed shaft (12) is inserted into the mounting hole (11), and the top end of the fixed shaft (12) is fixedly connected to a ball support pad (13).

7. A new type of soft-sealed ball valve according to claim 6, characterized in that: A shaft sleeve (14) is sleeved on the fixed shaft (12), and the fixed shaft (12) is connected to the hole wall of the mounting hole (11) via the shaft sleeve (14).

Images