Ball valve with good durability

Abstract

The utility model discloses a ball valve with good durability, which comprises a valve seat consisting of a left shell and a right shell, a valve core is arranged in the valve seat, a valve rod is arranged on the valve core, a handle is fixed at the top end of the valve rod, a rectangular block at the bottom end of the handle is positioned in a sliding chute on the valve core, a first sealing groove is formed in the left shell, and a second sealing groove is formed in the right shell. A first sealing ring is arranged in the first sealing groove, the thickness of the first sealing groove is larger than that of the first sealing ring, and elastic connection is formed between the first sealing ring and the left shell. According to the ball valve, under the condition that the ball valve is closed, the valve element is pressed on the first sealing ring under the action of water pressure, due to the fact that elastic connection is formed between the first sealing ring and the left shell, good sealing can be formed between the valve element and the first sealing ring, and meanwhile excessive extrusion cannot be formed on the first sealing ring; serious abrasion between the ball valve and the first sealing ring is avoided, and therefore the durability of the first sealing ring is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ball valve with good durability. Background Art

[0002] The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly against the sealing surface of the outlet end to ensure the sealing of the outlet end.

[0003] The existing sealing rings are all fixedly installed. Since the extrusion pressure formed between the new sealing ring and the ball valve is relatively large, the sealing ring will be worn out quickly as the ball valve rotates repeatedly, which leads to a worse and worse sealing effect. Therefore, corresponding improvements are made to address this problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a ball valve with good durability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ball valve with good durability includes a valve seat composed of a left shell and a right shell, a valve core is arranged in the valve seat, a valve stem is arranged on the valve core, a handle is fixed to the top of the valve stem, and a rectangular block at the bottom of the handle is located in a slide groove on the valve core, a first sealing groove is opened in the left shell, a first sealing ring is arranged in the first sealing groove, the thickness of the first sealing groove is greater than the first sealing ring, and an elastic connection is formed between the first sealing ring and the left shell.

[0007] Preferably, a positioning groove communicating with the first sealing groove is provided in the left shell body, a circular ring abutting against the first sealing ring is arranged in the positioning groove, and a plurality of springs distributed in an annular array and with their ends resting against the positioning groove are fixed on the side of the circular ring.

[0008] Preferably, a plurality of deviation-correcting rods distributed in a ring array are fixed on the circular ring, and the spring is sleeved on the deviation-correcting rods.

[0009] Preferably, a second sealing groove is opened in the right shell body, and a second sealing ring is arranged in the second sealing groove.

[0010] Preferably, the thickness of the second sealing ring is smaller than that of the second sealing groove, and the second sealing ring is provided with a force-bearing portion integrally formed therewith, and the inner diameter of the force-bearing portion is smaller than the caliber of the right shell body.

[0011] Preferably, the left shell and the right shell are both provided with a plurality of circular holes, a first bolt assembly for fixing the left shell and the right shell is inserted between two circular holes in the same group, and a fourth sealing ring is commonly provided in the fourth sealing groove on the left shell and the right shell.

[0012] Preferably, an end cover pressed on the valve stem is fixed to the right housing by a second bolt assembly, a third sealing groove is provided on the valve stem and the right housing, and a sealing ring sleeved on the valve stem is provided between the two third sealing grooves.

[0013] The beneficial effects of the utility model are:

[0014] 1. The device is provided with a first sealing ring with elastic connection, the left shell is the outlet end, and the right shell is the inlet end. When the ball valve is closed, the valve core is pressed against the first sealing ring under the action of water pressure. Since the first sealing ring and the left shell are elastically connected, a good seal can be formed between the valve core and the first sealing ring without excessive squeezing of the first sealing ring. When the ball valve is opened, the ball valve and the first sealing ring will not be seriously worn, thereby improving the durability of the first sealing ring.

[0015] 2. The device is provided with a second sealing ring, which forms a primary seal at the inlet end and cooperates with the secondary seal formed by the first sealing ring at the outlet end, thereby improving the sealing effect of the ball valve.

[0016] 3. A force-bearing part is provided in the device. When the ball valve is closed, the water pressure in the right shell will act on the force-bearing part, so that the second sealing ring is tightly attached to the valve core, thereby improving the sealing effect and preventing the valve core from excessively squeezing the second sealing ring, thereby improving the durability of the second sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a ball valve with good durability proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a ball valve with good durability proposed by the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of a proposed ball valve with good durability at point A;

[0020] Figure 4 This is a schematic diagram of the installation structure of the second sealing ring of a ball valve with good durability proposed by the utility model;

[0021] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure at point B of a proposed ball valve with good durability.

[0022] In the figure: 1. left shell; 2. right shell; 3. valve core; 4. valve stem; 5. handle; 6. first sealing groove; 7. first sealing ring; 8. circular ring; 9. positioning groove; 10. spring; 11. correction rod; 12. second sealing groove; 13. second sealing ring; 14. force-bearing part; 15. circular hole; 16. first bolt assembly; 17. third sealing groove; 18. sealing ring; 19. end cover; 20. second bolt assembly; 21. slide groove; 22. rectangular block; 23. fourth sealing groove; 24. fourth sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5 , a ball valve with good durability, including a valve seat composed of a left shell 1 and a right shell 2, a valve core 3 is arranged in the valve seat, a valve stem 4 is arranged on the valve core 3, a handle 5 is fixed on the top of the valve stem 4, and a rectangular block 22 at the bottom of the handle 5 is located in a slide groove 21 on the valve core 3, a first sealing groove 6 is opened in the left shell 1, a first sealing ring 7 is arranged in the first sealing groove 6, the thickness of the first sealing groove 6 is greater than the first sealing ring 7, an elastic connection is formed between the first sealing ring 7 and the left shell 1, the left shell 1 is the outlet end, and the right shell 2 is the inlet end. When the ball valve is closed, the valve core 3 is pressed against the first sealing ring 7 under the action of water pressure. Since the first sealing ring 7 is elastically connected to the left shell 1, a good seal can be formed between the valve core 3 and the first sealing ring 7 without excessively squeezing the first sealing ring 7. When the ball valve is opened, the ball valve will not be seriously worn with the first sealing ring 7, thereby improving the durability of the first sealing ring 7.

[0025] Furthermore, a positioning groove 9 communicating with the first sealing groove 6 is provided in the left housing 1, and a circular ring 8 in contact with the first sealing ring 7 is provided in the positioning groove 9. A plurality of springs 10 distributed in an annular array are fixed to the side of the circular ring 8, and the ends thereof abut against the positioning groove 9. In this way, the elastic force of the spring 10 can act on the circular ring 8 and then on the first sealing ring 7, thereby forming an elastic connection between the first sealing ring 7 and the left housing 1.

[0026] Furthermore, a plurality of correcting rods 11 distributed in a circular array are fixed on the circular ring 8, and the spring 10 is sleeved on the correcting rods 11. The correcting rods 11 can correct the elastically moving spring 10 to prevent it from twisting and deforming.

[0027] Furthermore, a second sealing groove 12 is opened in the right shell 2, and a second sealing ring 13 is arranged in the second sealing groove 12. The second sealing ring 13 forms an initial seal at the inlet end, and cooperates with the second seal formed by the first sealing ring 7 at the outlet end, thereby improving the sealing effect of the ball valve.

[0028] Furthermore, the thickness of the second sealing ring 13 is smaller than that of the second sealing groove 12. The second sealing ring 13 is provided with a force-bearing portion 14 integrally formed therewith. The inner diameter of the force-bearing portion 14 is smaller than the caliber of the right shell body 2. When the ball valve is closed, the water pressure in the right shell body 2 will act on the force-bearing portion 14, so that the second sealing ring 13 is tightly attached to the valve core 3, thereby improving the sealing effect and preventing the valve core 3 from excessively squeezing the second sealing ring 13, thereby improving the durability of the second sealing ring 13.

[0029] Furthermore, a plurality of circular holes 15 are provided on the left shell body 1 and the right shell body 2, and a first bolt assembly 16 for fixing the left shell body 1 and the right shell body 2 together is inserted between two circular holes 15 of the same group, and a fourth sealing ring 24 is commonly provided in the fourth sealing groove 23 on the left shell body 1 and the right shell body 2, so that a seal can be formed between the left shell body 1 and the right shell body 2 through the fourth sealing ring 24.

[0030] Furthermore, an end cover 19 pressed on the valve stem 4 is fixed to the right housing 2 by a second bolt assembly 20, a third sealing groove 17 is provided on the valve stem 4 and the right housing 2, and a sealing ring 18 which is sleeved on the valve stem 4 is provided between the two third sealing grooves 17, so that the gap between the valve stem 4 and the right housing 2 can be sealed by the sealing ring 18.

[0031] Working principle: the left housing 1 is the outlet end, and the right housing 2 is the inlet end. When the ball valve is closed, the valve core 3 is pressed against the first sealing ring 7 under the action of water pressure. Since the first sealing ring 7 and the left housing 1 are elastically connected, a good seal can be formed between the valve core 3 and the first sealing ring 7 without excessively squeezing the first sealing ring 7. When the ball valve is opened, the ball valve and the first sealing ring 7 will not be seriously worn.

[0032] When the ball valve is closed, the water pressure in the right housing 2 acts on the force-bearing portion 14 , so that the second sealing ring 13 is pressed tightly against the valve core 3 , thereby improving the sealing effect and preventing the valve core 3 from over-extruding the second sealing ring 13 .

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A ball valve with good durability, comprising a valve seat composed of a left housing (1) and a right housing (2), a valve core (3) being arranged in the valve seat, a valve stem (4) being arranged on the valve core (3), a handle (5) being fixed on the top end of the valve stem (4), a rectangular block (22) at the bottom end of the handle (5) being located in a slide groove (21) on the valve core (3), characterized in that: A first sealing groove (6) is provided in the left housing (1), a first sealing ring (7) is provided in the first sealing groove (6), the thickness of the first sealing groove (6) is greater than the first sealing ring (7), and an elastic connection is formed between the first sealing ring (7) and the left housing (1).

2. A ball valve with good durability according to claim 1, characterized in that: The left housing (1) is provided with a positioning groove (9) which communicates with the first sealing groove (6); a circular ring (8) which abuts against the first sealing ring (7) is provided in the positioning groove (9); a plurality of springs (10) distributed in an annular array and having their ends abutting against the positioning groove (9) are fixed to the side surface of the circular ring (8).

3. A ball valve with good durability according to claim 2, characterized in that: A plurality of deviation-correcting rods (11) distributed in a circular array are fixed to the circular ring (8), and the spring (10) is sleeved on the deviation-correcting rods (11).

4. A ball valve with good durability according to claim 1, characterized in that: A second sealing groove (12) is provided in the right housing (2), and a second sealing ring (13) is provided in the second sealing groove (12).

5. A ball valve with good durability according to claim 4, characterized in that: The thickness of the second sealing ring (13) is smaller than that of the second sealing groove (12); the second sealing ring (13) is provided with a force-bearing portion (14) integrally formed therewith; the inner diameter of the force-bearing portion (14) is smaller than the caliber of the right housing (2).

6. A ball valve with good durability according to claim 1, characterized in that: The left housing (1) and the right housing (2) are both provided with a plurality of circular holes (15); a first bolt assembly (16) for fixing the left housing (1) and the right housing (2) is inserted between two circular holes (15) in the same group; and a fourth sealing ring (24) is commonly provided in the fourth sealing groove (23) on the left housing (1) and the right housing (2).

7. A ball valve with good durability according to claim 1, characterized in that: An end cover (19) pressed against the valve stem (4) is fixed to the right housing (2) via a second bolt assembly (20); a third sealing groove (17) is provided on the valve stem (4) and the right housing (2); a sealing ring (18) sleeved on the valve stem (4) is provided between the two third sealing grooves (17).

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