Full-bore ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to a full-bore ball valve which comprises a valve body, a valve core, a valve rod and a handle, an installation cylinder is arranged on the upper portion of the valve body, a cover plate is detachably connected to the top of the installation cylinder, and a baffle ring abutting against the bottom of the cover plate is arranged on the valve rod. The ball valve comprises a valve body, a valve core and a valve rod, a cover plate is arranged in the valve body, two annular seats with annular notches are arranged in the valve body, a sealing ring is arranged in each annular seat, a limiting structure is arranged between the valve core and the valve rod, and a guide structure is arranged between the top of the valve core and the bottom of the valve body. Damaged sealing rings or valve elements can be replaced in time, the maintenance cost is reduced, and convenience and rapidness are achieved; meanwhile, due to the full-bore arrangement, necking-free and full-bore circulation can be achieved, the circulation capacity of the valve is greatly improved, and energy loss is reduced; the structure of the ball valve device is symmetrically arranged, the structural rigidity is large, and stress is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a full-bore ball valve. Background Art

[0002] Ball valves have become one of the fastest-developing valves in recent years due to their advantages such as simple structure, good sealing performance, and light weight. The opening and closing part of a ball valve is a sphere. In a pipeline, a ball valve is mainly used to cut off, distribute, and change the flow direction of the medium, and the sphere rotates 90° around the axis of the valve stem to achieve the purpose of opening and closing.

[0003] Currently, in the existing ball valve technology, the sealing form of ball valves is surface pressure sealing. During the opening process of the valve, there is friction on the sealing surface throughout the process, which increases the wear of the sealing surface and causes a relatively large torque of the ball valve. After the sealing parts are worn, due to the integrated structure of the valve body, it is convenient to replace the internal parts of the valve body, resulting in the need to replace the entire valve body, thus increasing the cost. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a full-bore ball valve to solve the problems in the above background art.

[0005] Based on the above purpose, the present utility model provides a full-bore ball valve, including a valve body, a valve core, a valve stem, and a handle. The valve core is installed inside the valve body. The valve stem passes through the valve body. One end of the valve stem is in driving connection with the valve core, and the other end is fixedly connected with the handle. An installation cylinder is provided at the upper part of the valve body. A cover plate is detachably connected to the top of the installation cylinder. The cover plate is sleeved on the valve stem. A retaining ring is provided on the valve stem to abut against the bottom of the cover plate. Two ring seats with annular notches are provided inside the valve body. A sealing ring is provided inside each ring seat. Each sealing ring is in contact with one side of the valve core respectively. A limiting structure is provided between the valve core and the valve stem. The limiting structure is used to limit the rotation of the valve stem between 0 - 90 degrees, and a guiding structure is provided between the top of the valve core and the bottom of the valve body.

[0006] Preferably, one end of the valve body is connected with a water inlet pipe, and the other end is connected with a water outlet pipe.

[0007] Preferably, a first sealing ring is provided between the installation cylinder and the cover plate. The first sealing ring is clamped at the top of the installation cylinder.

[0008] Preferably, a hexagonal nut is fixedly provided at the top of the cover plate.

[0009] Preferably, at least two second sealing rings are provided inside the hexagonal nut and the cover plate. Each second sealing ring is sleeved on the valve stem by a clamping method.

[0010] Preferably, the limiting structure includes:

[0011] A connecting disc, fixedly arranged at the top of the valve core, the connecting disc is arranged inside the installation cylinder, and the top of the connecting disc is fixedly connected to one end of the valve stem;

[0012] A limiting block, fixedly arranged on the outer wall of the connecting disc;

[0013] Two stop blocks, respectively arranged at the top of the ring seat, and each stop block is fixedly connected to the inner wall of the installation cylinder.

[0014] Preferably, the guiding structure includes:

[0015] A circular through-hole, arranged at the bottom of the valve core;

[0016] A guiding ring, arranged inside the circular through-hole, and the guiding ring is fixedly connected to the inner bottom of the valve body.

[0017] Preferably, the guiding ring is provided with two avoidance openings for improving the fitting installation of the circular cylinder and the guiding ring, and a baffle for preventing the valve core from being eccentric in the up and down positions is fixedly arranged inside the circular through-hole.

[0018] The beneficial effects of the present utility model: Compared with the existing ball valve, the cover plate of this ball valve is convenient to disassemble, the damaged sealing ring or valve core can be replaced in time, reducing the maintenance cost, which is convenient and fast; at the same time, the full-bore setting can achieve non-reducing neck and full-bore flow-through, greatly improving the flow capacity of the valve and reducing the energy loss; the structure of this ball valve device is symmetrically arranged, with large structural rigidity and balanced force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the whole of the embodiment of the present utility model;

[0021] Figure 2 It is an exploded view of the embodiment of the present utility model.

[0022] The marks in the figure are:

[0023] 1. Valve body; 2. Valve core; 3. Valve stem; 4. Handle; 5. Installation cylinder; 6. Cover plate; 7. Retaining ring; 8. Ring seat; 9. Sealing ring; 10. Water inlet pipe; 11. Water outlet pipe; 12. First sealing ring; 13. Hexagonal nut; 14. Second sealing ring; 15. Connecting plate; 16. Limit block; 17. Stop block; 18. Circular through hole; 19. Alignment ring; 20. Avoidance opening; 21. Baffle plate. Detailed implementation mode

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further details the present utility model in combination with specific embodiments.

[0025] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] As Figure 1 and Figure 2 shown, a full-bore ball valve includes a valve body 1, a valve core 2, a valve stem 3 and a handle 4. The valve core 2 is installed inside the valve body 1. The valve stem 3 passes through the valve body 1. One end of the valve stem 3 is in transmission connection with the valve core 2, and the other end is fixedly connected to the handle 4. An installation cylinder 5 is provided at the upper part of the valve body 1. A cover plate 6 is detachably connected to the top of the installation cylinder 5. The cover plate 6 is sleeved on the valve stem 3. A retaining ring 7 that abuts against the bottom of the cover plate 6 is provided on the valve stem 3. Two ring seats 8 with annular notches are provided inside the valve body 1. A sealing ring 9 is provided inside each ring seat 8. Each sealing ring 9 is in contact with one side of the valve core 2 respectively. A limiting structure is provided between the valve core 2 and the valve stem 3. The limiting structure is used to limit the rotation of the valve stem 3 between 0 - 90 degrees, and an alignment structure is provided between the top of the valve core 2 and the bottom of the valve body 1.

[0027] For example, compared with the existing ball valve, the cover plate 6 of this ball valve is easy to disassemble, and the damaged sealing ring 9 or valve core 2 can be replaced in time, reducing the maintenance cost, which is convenient and fast; at the same time, the full-bore setting can achieve non-reduced neck and full-bore flow, greatly improving the flow capacity of the valve and reducing the energy loss; the structure of this ball valve device is symmetrically arranged, with large structural rigidity and balanced force. By setting a retaining ring 7 on the valve stem 3 and cooperating with the alignment structure, the valve stem 3 will not shake up and down during use, affecting the normal use of the ball valve. In severe cases, it may cause deformation or damage to the valve body 1.

[0028] As an alternative embodiment, one end of the valve body 1 is connected to a water inlet pipe 10, and the other end is connected to a water outlet pipe 11.

[0029] As an alternative embodiment, a first sealing ring 12 is provided between the mounting cylinder 5 and the cover plate 6, and the first sealing ring 12 is clamped on the top of the mounting cylinder 5.

[0030] For example, by providing the first sealing ring 12 between the mounting cylinder 5 and the cover plate 6, it is used to improve the sealing performance between the cover plate 6 and the mounting cylinder 5.

[0031] As an alternative embodiment, a hexagon nut 13 is fixedly provided on the top of the cover plate 6.

[0032] As an alternative embodiment, at least two second sealing rings 14 are provided inside the hexagon nut 13 and the cover plate 6, and each second sealing ring 14 is sleeved on the valve stem 3 by a clamping method.

[0033] For example, by fixedly providing the hexagon nut 13 on the cover plate 6, it is convenient to quickly disassemble the cover plate 6 with a wrench. At the same time, when the valve stem 3 rotates inside the hexagon nut 13 and the cover plate 6, there will be wear and tear affecting the sealing performance. By setting a plurality of second sealing rings 14 for restriction, the sealing performance during the rotation of the valve stem 3 is improved.

[0034] As an alternative embodiment, the limiting structure includes:

[0035] A connecting disc 15, fixedly provided on the top of the valve core 2, the connecting disc 15 is arranged inside the mounting cylinder 5, and the top of the connecting disc 15 is fixedly connected to one end of the valve stem 3;

[0036] A limiting block 16, fixedly provided on the outer wall of the connecting disc 15;

[0037] Two blocking blocks 17, respectively arranged on the top of the ring seat 8, and each blocking block 17 is fixedly connected to the inner wall of the mounting cylinder 5.

[0038] For example, through the design of the connecting plate 15, the limiting block 16 and the stop block 17, the valve stem 3 rotates 90° to achieve the purpose of opening and closing.

[0039] As an alternative embodiment, the guiding structure includes:

[0040] A circular through hole 18, provided at the bottom of the valve element 2;

[0041] A guiding ring 19, provided in the circular through hole 18, and the guiding ring 19 is fixedly connected to the inner bottom of the valve body 1.

[0042] As an alternative embodiment, two relief openings 20 for improving the fitting installation of the circular cylinder and the guiding ring 19 are provided on the guiding ring 19, and a baffle 21 for preventing the valve element 2 from being eccentric in the up and down positions is fixedly provided inside the circular through hole 18.

[0043] For example, by providing a circular through hole 18 on the valve element 2 and a guiding ring 19 inside the valve body 1, the accuracy of the valve element 2 during the installation process is improved. By providing relief openings 20 on the guiding ring 19, the friction between the guiding ring 19 and the valve element 2 is reduced, avoiding the valve element 2 being stuck on the guiding ring 19 and difficult to remove. By providing the baffle 21, the accuracy of the installation position of the valve element 2 inside the valve body 1 is further improved.

[0044] Those of ordinary skill in the art should understand that: The discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A full-diameter ball valve, comprising a valve body (1), a valve core (2), a valve stem (3) and a handle (4), wherein the valve core (2) is mounted inside the valve body (1), the valve stem (3) is passed through the valve body (1), one end of the valve stem (3) is drivingly connected to the valve core (2), and the other end is fixedly connected to the handle (4), characterized in that: The upper part of the valve body (1) is provided with a mounting tube (5), the top of the mounting tube (5) is detachably connected with a cover plate (6), the cover plate (6) is sleeved on the valve stem (3), the valve stem (3) is provided with a retaining ring (7) abutting against the bottom of the cover plate (6), the interior of the valve body (1) is provided with two ring seats (8) with annular notches, each of the ring seats (8) is provided with a sealing ring (9), each of the sealing rings (9) is in contact with one side of the valve core (2), a limiting structure is provided between the valve core (2) and the valve stem (3), the limiting structure is used to limit the rotation of the valve stem (3) between 0 and 90 degrees, and a guiding structure is provided between the top of the valve core (2) and the bottom of the valve body (1).

2. A full-bore ball valve according to claim 1, characterized in that: One end of the valve body (1) is connected to a water inlet pipe (10), and the other end is connected to a water outlet pipe (11).

3. A full-bore ball valve according to claim 1, characterized in that: A first sealing ring (12) is provided between the installation tube (5) and the cover plate (6), and the first sealing ring (12) is clamped on the top of the installation tube (5).

4. A full-bore ball valve according to claim 1, characterized in that: A hexagonal nut (13) is fixedly arranged on the top of the cover plate (6).

5. A full-bore ball valve according to claim 4, characterized in that: At least two second sealing rings (14) are arranged inside the hexagonal nut (13) and the cover plate (6), and each of the second sealing rings (14) is sleeved on the valve stem (3) by means of a clamping connection.

6. A full-bore ball valve according to claim 1, characterized in that: The limiting structure comprises: A connecting plate (15) is fixedly mounted on the top of the valve core (2), the connecting plate (15) is arranged in the mounting tube (5), and the top of the connecting plate (15) is fixedly connected to one end of the valve stem (3); A limit block (16) is fixedly mounted on the outer wall of the connecting plate (15); Two stoppers (17) are respectively arranged on the top of the ring seat (8), and each of the stoppers (17) is fixedly connected to the inner wall of the mounting tube (5).

7. A full-bore ball valve according to claim 1, characterized in that: The guiding structure comprises: A circular through hole (18) is arranged at the bottom of the valve core (2); A guide ring (19) is arranged in the circular through hole (18), and the guide ring (19) is fixedly connected to the inner bottom of the valve body (1).

8. A full-bore ball valve according to claim 7, characterized in that: The guide ring (19) is provided with two avoidance openings (20) for improving the adaptability of the circular cylinder and the guide ring (19) to be installed, and a baffle (21) for preventing the valve core (2) from being eccentric in the upper and lower positions is fixedly provided inside the circular through hole (18).

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