Ball valve with seat unseating structure

Abstract

The utility model relates to a ball valve with valve seat prop open structure, include: valve body, ball and two valve seats, the fluid passage of both ends of valve body are open, and the top of valve body is equipped with the mounting hole that communicates with the fluid passage, two valve seats are opposite installation in valve body along the direction of one end to the other end of fluid passage, and are connected with valve body through return mechanism respectively, and the mounting hole is located between two valve seats, the ball rotatable installation in valve body, and it is located between two valve seats, the both sides of at least one end of ball are equipped with recess respectively, and the prop open structure is equipped in each recess, and the prop open structure is butt joint with corresponding valve seat. The utility model has the advantages of simple structure, reasonable in design, can make ball and valve seat separate through prop open structure without sealing, avoid the wear and tear of ball and valve seat contact in the process of rotating, thereby avoid the leakage of ball valve, guarantee the sealing property of ball valve.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and specifically to a ball valve with a valve seat opening structure. Background Technology

[0002] Ball valves are widely used in various industries due to their advantages such as low fluid resistance, simple structure, excellent sealing performance, and convenient maintenance. To cope with harsh working conditions, such as high temperature and particles, ball valves are designed with a hard seal structure. However, the machining and grinding of hard seals are difficult, and even with the use of hard alloys, the inherent tendency of hard-seal ball valves to wear and leak remains.

[0003] To address the aforementioned problems, it is imperative to design a ball valve structure that solves them. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a ball valve with a valve seat opening structure.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A ball valve with a valve seat opening structure includes: a valve body, a ball, and two valve seats. The valve body has a fluid passage with both ends open, and the top of the valve body has a mounting hole communicating with the fluid passage. The two valve seats are installed opposite each other in the valve body along the direction from one end to the other of the fluid passage, and are respectively connected to the valve body through a return mechanism. The mounting hole is located between the two valve seats. The ball is rotatably mounted in the valve body and is located between the two valve seats; at least one end of the ball has grooves on both sides, and each groove has a supporting structure that abuts against the corresponding valve seat.

[0006] The beneficial effects of this utility model are: during use, the sphere is rotated in a way that can be conceived by those skilled in the art, and each expansion structure will enter or exit the corresponding groove during the rotation of the sphere. When the expansion structure enters the groove, the valve seat is pressed against the ball by the return mechanism until it fits, forming a seal; When the opening structure exits the groove, it pushes the valve seat open, separating the valve seat from the ball, thus preventing the ball from contacting the valve seat and causing wear during rotation.

[0007] This utility model has a simple structure and reasonable design. It can separate the ball from the valve seat by expanding the structure without the need for sealing, thus avoiding wear caused by the ball contacting the valve seat during rotation, thereby preventing leakage of the ball valve and ensuring the sealing performance of the ball valve.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the expansion structure includes an expansion frame and a support rod. The support rod is installed in the valve body and extends along the direction from one end of the fluid channel to the other end. The support rod is located between the ball and the corresponding valve seat, with one end abutting against the corresponding valve seat. The expansion frame is installed in the valve body, located between the ball and the support rod, and both ends of the expansion frame abut against the other end of the support rod and the ball, respectively.

[0010] The beneficial effect of adopting the above-mentioned further solution is that during use, the sphere can be rotated in a way that can be conceived by those skilled in the art, and during the rotation of the sphere, the support frame and the support rod will enter or exit the corresponding groove. When the support frame and support rod enter the groove, the valve seat is pressed against the ball by the return mechanism until they fit together, forming a seal; When the support frame and strut exit the groove, they push the valve seat open, separating it from the ball and preventing the ball from contacting the valve seat and causing wear during rotation.

[0011] Furthermore, the support rod has a cylindrical rod-like structure.

[0012] The advantages of adopting the above-mentioned further solution are that the structure is simple, the shape of the strut is reasonably designed, and it is easy to cooperate with the support frame to open the valve seat.

[0013] Furthermore, the support frame includes a base body, which is installed inside the valve body and located between the ball and the support rod, with both ends of the base body abutting against the other end of the support rod and the ball, respectively.

[0014] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During the rotation of the ball, the cooperation between the seat and the support rod and the groove on the ball allows the support rod to push open the valve seat, thus avoiding the ball from contacting the valve seat and causing wear during the rotation.

[0015] Furthermore, the support frame also includes rollers, which are rotatably mounted on the base.

[0016] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. It uses rollers to change the sliding between the ball and the seat into rolling, which reduces friction and is more conducive to the rotation of the ball.

[0017] Furthermore, the roller is rotatably connected to the base via a rotating shaft, which is distributed perpendicular to the fluid channel.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple, the distribution of the rollers is more reasonable, and the rolling direction is consistent with the rotation direction of the ball, which is more conducive to the rotation of the ball and saves time and effort.

[0019] Furthermore, the sphere is provided with grooves on both sides at both ends.

[0020] The advantages of adopting the above-mentioned further solution are that the structure is simple, the number of grooves is reasonably designed, and the double-sided sealing of the ball valve can be achieved, resulting in a better sealing effect.

[0021] Furthermore, it also includes two valve seat pressure rings, which are installed opposite to each other in the valve body, with their axial direction parallel to the fluid passage; each valve seat pressure ring is located between the corresponding valve seat and the support rod, and both ends of each valve seat pressure ring abut against one end of the support rod and one end of the corresponding valve seat.

[0022] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During the rotation of the ball, the support rod uses the valve seat pressure ring to push the valve seat open, which avoids the ball from contacting the valve seat and causing wear during the rotation, thus extending the service life of the ball and ensuring the overall sealing of the ball valve, thereby reducing costs. In addition, the valve seat pressure ring can prevent direct contact between the valve seat and the support rod, which can reduce valve seat wear and extend the service life of the valve seat.

[0023] Furthermore, each valve seat has an annular step at one end, and one end of the valve seat pressure ring abuts against the corresponding annular step.

[0024] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design of the annular step is more reasonable, and the force of the strut can be evenly applied to the valve seat, resulting in a better opening effect.

[0025] Furthermore, each of the valve seat pressure rings has a ring-shaped structure that is thick at one end and thin at the other end.

[0026] The advantages of adopting the above-mentioned further solution are that the structure is simple and the shape design of the valve seat pressure ring is reasonable. It can not only realize the opening of the valve seat, but also save materials and reduce costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall internal structure of this utility model; Figure 2 This is a schematic diagram of a single supporting structure in this utility model; Figure 3 This is a cross-sectional view of the sphere in this utility model; Figure 4 This is a schematic diagram of the end of the sphere in this utility model.

[0028] The attached diagram lists the components represented by each number as follows: 1. Valve body; 2. Ball; 3. Valve seat; 4. Fluid passage; 5. Groove; 6. Support rod; 7. Seat; 8. Roller; 9. Shaft; 10. Valve seat pressure ring; 11. Valve cover; 12. Upper valve stem; 13. Lower valve stem; 14. Return spring. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0032] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0033] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0034] Example 1 like Figures 1 to 4 As shown, this embodiment provides a ball valve with a valve seat opening structure, including: a valve body 1, a ball 2, and two valve seats 3. The valve body 1 has a fluid channel 4 with both ends open, and the top of the valve body 1 has a mounting hole communicating with the fluid channel 4. The two valve seats 3 are installed opposite each other in the valve body 1 along the direction from one end to the other of the fluid channel 4, and are respectively connected to the valve body 1 through a return mechanism. The mounting hole is located between the two valve seats 3. The ball 2 is rotatably installed inside the valve body 1 and is located between the two valve seats 3; at least one end of the ball 2 is provided with grooves 5 on both sides, and each groove 5 is provided with a spreading structure, which abuts against the corresponding valve seat 3.

[0035] During use, the sphere 2 is rotated in a manner that can be conceived by those skilled in the art, and each expansion structure will enter or exit the corresponding groove 5 during the rotation of the sphere 2. When the expansion structure enters the groove 5, the valve seat 3 is pressed against the ball 2 by the return mechanism until it fits, forming a seal. When the opening structure exits the groove 5, it pushes the valve seat 3 open, separating the valve seat 3 from the ball 2, thus preventing the ball 2 from contacting the valve seat 3 and causing wear during rotation.

[0036] Preferably, in this embodiment, the two valve seats 3 are preferably of annular structure.

[0037] Preferably, in this embodiment, the fluid channel 4 is preferably a cylindrical channel.

[0038] Preferably, in this embodiment, two annular grooves are provided opposite to each other on the inner wall of the valve body 1, and two valve seats 3 are located between the two annular grooves.

[0039] In addition, each return mechanism includes a return spring 14, which is distributed in the corresponding annular groove. Its two ends abut against the bottom of the annular groove and the corresponding valve seat 3, respectively. During use, when the opening structure enters the groove 5, the valve seat 3 is pressed against the ball 2 by the return spring 14 until they fit together, forming a seal. At this time, the return spring 14 is in a naturally extended state. When the opening structure exits the groove 5, the opening structure pushes the valve seat 3 open, separating the valve seat 3 from the ball 2, preventing the ball 2 from contacting the valve seat 3 and causing wear during rotation. At this time, the return spring 14 is in a compressed state.

[0040] Alternatively, multiple slots matching the number of return mechanisms can be provided on valve body 1.

[0041] Preferably, this embodiment also includes a valve cover 11, which is fixedly installed at the mounting hole and seals the mounting hole.

[0042] Preferably, this embodiment also includes an upper valve stem 12 and a lower valve stem 13, which are installed opposite to each other on both sides of the ball 2, and their opposite ends are fixedly connected to the center of both sides of the ball 2.

[0043] In addition, the end of the upper valve stem 12 away from the ball 2 extends through the valve cover 11 to the outside of the valve body 1, and the end of the lower valve stem 13 away from the ball 2 is rotatably connected to the side wall of the valve body 1.

[0044] Furthermore, the upper valve stem 12 and the lower valve stem 13 can be integrated with the ball 2 or designed separately, depending on the specific requirements.

[0045] During use, the upper valve stem 12 is manually rotated, which drives the ball 2 and the lower valve stem 13 to rotate.

[0046] This embodiment has a simple structure and reasonable design. It can separate the ball 2 from the valve seat 3 by expanding the structure without the need for sealing. This avoids the ball 2 from contacting the valve seat 3 and causing wear during rotation, thereby preventing leakage of the ball valve and ensuring the sealing performance of the ball valve.

[0047] Example 2 Based on Embodiment 1, in this embodiment, the spreading structure includes a spreading frame and a support rod 6. The support rod 6 is installed inside the valve body 1 and extends along the direction from one end of the fluid channel 4 to the other end. The support rod 6 is located between the ball 2 and the corresponding valve seat 3, with one end abutting against the corresponding valve seat 3. The spreading frame is installed inside the valve body 1, located between the ball 2 and the support rod 6, and both ends of the spreading frame abut against the other end of the support rod 6 and the ball 2, respectively.

[0048] During use, the sphere 2 is rotated in a manner that can be conceived by those skilled in the art. During the rotation of the sphere 2, the support frame and the support rod 6 will enter or exit the corresponding groove 5. When the support frame and the support rod 6 enter the groove 5, the valve seat 3 is pressed against the ball 2 by the return mechanism until they fit together, forming a seal; When the support frame and support rod 6 exit the groove 5, the valve seat 3 is pushed open by the support frame and support rod 6, so that the valve seat 3 is separated from the ball 2, thus avoiding the ball 2 from contacting the valve seat 3 and causing wear during rotation.

[0049] Example 3 Based on Example 2, in this example, the support rod 6 has a cylindrical rod-shaped structure.

[0050] The scheme has a simple structure and the shape of the support rod 6 is reasonably designed, which makes it easy to cooperate with the support frame to open the valve seat 3.

[0051] Alternatively, the aforementioned strut 6 can also adopt other suitable geometric shapes, such as a rod with a rectangular cross-section.

[0052] Example 4 Based on any one of Embodiments 2 to 3, in this embodiment, the support frame includes a seat 7, which is installed inside the valve body 1 and is located between the ball 2 and the support rod 6. The two ends of the seat 7 abut against the other end of the support rod 6 and the ball 2, respectively.

[0053] The scheme has a simple structure and reasonable design. During the rotation of the ball 2, the seat 7 and the support rod 6 cooperate with the groove 5 on the ball 2 to make the support rod 6 push open the valve seat 3, so as to avoid the ball 2 contacting the valve seat 3 and causing wear during the rotation.

[0054] Example 5 Based on embodiment 4, in this embodiment, the support frame further includes rollers 8, which are rotatably mounted on the base 7.

[0055] The scheme has a simple structure and reasonable design. It uses the roller 8 to change the sliding between the ball 2 and the seat 7 into rolling, which reduces friction and is more conducive to the rotation of the ball 2.

[0056] Example 6 Based on embodiment 5, in this embodiment, the roller 8 is rotatably connected to the seat 7 via a rotating shaft 9, and the rotating shaft 9 is distributed perpendicular to the fluid channel 4.

[0057] The design is simple in structure, and the distribution of the rollers 8 is relatively reasonable. Their rolling direction is consistent with the rotation direction of the ball 2, which is more conducive to the rotation of the ball 2 and saves time and effort.

[0058] Example 7 Based on any one of Embodiments 2 to 6, in this embodiment, the grooves 5 are respectively provided on both sides of the two ends of the sphere 2.

[0059] The design features a simple structure and a reasonable number of grooves 5, which enables double-sided sealing of the ball valve and provides a good sealing effect.

[0060] Based on the above scheme, the number and position of the grooves 5 can achieve single-sided or double-sided sealing of the ball valve, as detailed below: Option 1: When grooves 5 are provided on both sides of any one end of the ball 2, a single-sided seal of the ball valve can be achieved.

[0061] Option 2: When grooves 5 are provided on both sides of the two ends of the ball 2, a double-sided seal of the ball valve can be achieved.

[0062] Example 8 Based on embodiment 7, this embodiment further includes two valve seat pressure rings 10, which are installed opposite to each other in the valve body 1, with their axial direction parallel to the fluid channel 4; each valve seat pressure ring 10 is located between the corresponding valve seat 3 and the support rod 6, and both ends of each valve seat pressure ring 10 abut against one end of the support rod 6 and one end of the corresponding valve seat 3.

[0063] The solution has a simple structure and reasonable design. During the rotation of the ball 2, the support rod 6 uses the valve seat pressure ring 10 to push the valve seat 3 open, which avoids the ball 2 from contacting the valve seat 3 during the rotation and causing wear, thus extending the service life of the ball 2 and ensuring the overall sealing of the ball valve, thereby reducing costs. In addition, the valve seat pressure ring 10 can prevent direct contact between the valve seat 3 and the support rod 6, which can reduce the wear of the valve seat 3, extend the service life of the valve seat 3, and thus extend the service life of the entire ball valve.

[0064] Alternatively, multiple pressure blocks can be used to replace the two valve seat pressure rings 10 mentioned above. The number of pressure blocks is the same as the number of support rods 6, that is, the two ends of each pressure block abut against the corresponding valve seat 3 and support rod 6 respectively.

[0065] Example 9 Based on embodiment 8, in this embodiment, one end of each valve seat 3 is provided with an annular step, and one end of the valve seat pressure ring 10 abuts against the corresponding annular step.

[0066] The design of this scheme is simple, and the design of the annular step is reasonable, which allows the force of the support rod 6 to be applied evenly to the valve seat, resulting in a better opening effect.

[0067] Preferably, in this embodiment, each annular step is formed by the inner recess of the corresponding end of the valve seat 3.

[0068] Example 10 Based on any one of Embodiments 8 to 9, in this embodiment, each valve seat pressure ring 10 has a ring-shaped structure with one end thick and the other end thin.

[0069] The scheme has a simple structure and a reasonable shape design for the valve seat pressure ring 10, which can both open the valve seat 3 and save materials and reduce costs.

[0070] Alternatively, each of the valve seat pressure rings 10 described above can also be a ring with the same dimensions at both ends.

[0071] The working principle of this utility model is as follows: During use, the operator can manually rotate the ball 2 via the upper valve stem 12. When the structure is opened and enters the groove 5, the valve seat 3 is pressed against the ball 2 by the return spring 14 until it fits and forms a seal. At this time, the return spring 14 is in a naturally extended state. When the support structure exits the groove 5, the valve seat 3 is pushed open by the seat body 7, the support rod 6 and the valve seat pressure ring 10, so that the valve seat 3 is separated from the ball 2, avoiding the ball 2 from contacting the valve seat 3 and causing wear during rotation. At this time, the return spring 14 is in a compressed state.

[0072] This utility model provides a ball valve with a valve seat opening structure. The ball valve has a simple structure and reasonable design. It can separate the ball 2 from the valve seat 3 without sealing, thus avoiding wear caused by the ball 2 contacting the valve seat 3 during rotation, thereby preventing leakage and ensuring the sealing performance of the ball valve.

[0073] The ball valve with a valve seat opening structure provided by this utility model is mainly used in hard-seal fixed ball valves. It is used to realize the quick separation of the ball valve seat from the ball, extend the service life of the ball valve and reduce costs.

[0074] The opening structure of this ball valve seat has the following advantages: 1) Simple structure; 2) Replacing sliding with rolling rollers reduces operating torque and makes operation easier; 3) The roller is close to the central axis of the ball's rotation, resulting in a short lever arm and greatly reducing the operating torque; 4) The valve seat and ball can quickly separate, avoiding unnecessary friction between them and extending the service life of the sealing pair.

[0075] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A ball valve with a valve seat opening structure, characterized in that, include: The valve body (1), ball (2), and two valve seats (3) are provided. The valve body (1) is provided with a fluid channel (4) with both ends open, and the top of the valve body (1) is provided with a mounting hole communicating with the fluid channel (4). The two valve seats (3) are installed opposite to each other in the valve body (1) along the direction from one end to the other of the fluid channel (4), and are respectively connected to the valve body (1) through a return mechanism. The mounting hole is located between the two valve seats (3). The ball (2) is rotatably installed inside the valve body (1) and is located between the two valve seats (3); at least one end of the ball (2) is provided with grooves (5) on both sides, and each groove (5) is provided with a spreading structure, which abuts against the corresponding valve seat (3).

2. The ball valve with a valve seat opening structure according to claim 1, characterized in that, The expansion structure includes an expansion frame and a support rod (6). The support rod (6) is installed inside the valve body (1) and extends along the direction from one end of the fluid channel (4) to the other end. The support rod (6) is located between the ball (2) and the corresponding valve seat (3), and one end of the support rod (6) abuts against the corresponding valve seat (3). The expansion frame is installed inside the valve body (1) and is located between the ball (2) and the support rod (6). Both ends of the expansion frame abut against the other end of the support rod (6) and the ball (2), respectively.

3. The ball valve with a valve seat opening structure according to claim 2, characterized in that, The support rod (6) has a cylindrical rod-like structure.

4. The ball valve with a valve seat opening structure according to claim 2, characterized in that, The support frame includes a seat (7), which is installed inside the valve body (1) and is located between the ball (2) and the support rod (6). The two ends of the seat (7) abut against the other end of the support rod (6) and the ball (2), respectively.

5. The ball valve with a valve seat opening structure according to claim 4, characterized in that, The support frame also includes rollers (8), which are rotatably mounted on the base (7).

6. The ball valve with a valve seat opening structure according to claim 5, characterized in that, The roller (8) is rotatably connected to the seat (7) via a rotating shaft (9), which is distributed perpendicular to the fluid channel (4).

7. The ball valve with a valve seat opening structure according to any one of claims 2-6, characterized in that, The sphere (2) has grooves (5) on both sides at both ends.

8. The ball valve with a valve seat opening structure according to claim 7, characterized in that, It also includes two valve seat pressure rings (10), which are installed opposite each other in the valve body (1) with their axial direction parallel to the fluid channel (4); each valve seat pressure ring (10) is located between the corresponding valve seat (3) and the support rod (6), and both ends of each valve seat pressure ring (10) abut against one end of the support rod (6) and one end of the corresponding valve seat (3).

9. The ball valve with a valve seat opening structure according to claim 8, characterized in that, Each valve seat (3) has an annular step at one end, and one end of the valve seat pressure ring (10) abuts against the corresponding annular step.

10. The ball valve with a valve seat opening structure according to claim 8, characterized in that, Each of the valve seat pressure rings (10) has a ring structure that is thick at one end and thin at the other end.

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