Novel leakage-proof valve

Abstract

The utility model relates to the technical field of valves, in particular to a novel leakage-proof valve. A water inlet and a water outlet are formed in the two ends of the valve body respectively, a ball core is arranged in the valve body, valve seats are arranged on the two sides of the ball core respectively, a valve shaft is connected to the upper portion of the ball core, the valve shaft is rotationally installed in the valve body through a bearing, a double-leakage-proof structure is arranged on the valve shaft, and a control handle is connected to the top end of the valve shaft. According to the device, the movable ring and the first sealing ring are arranged, the device can automatically move upwards when being pressed, then the second sealing ring is pushed through the air cushion, the sealing effect is kept, the sealing effect cannot be affected even if the surfaces of the first sealing ring and the second sealing ring are abraded to a certain degree, and therefore the service life of the valve can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a novel leak-proof valve. Background Art

[0002] In different fields such as industry, civil and agriculture, the control and transportation of fluids have always been an important part of production and life.

[0003] The design of traditional leak-proof valves mainly reduces leakage by improving sealing performance. However, in some cases, such as low temperature environments in winter or when conveying low-temperature media, the valve casing and valve core will expand and contract due to heat, resulting in increased gaps and a certain risk of leakage. Some valves need to be opened and closed frequently. The rotation of the valve shaft during the opening and closing process will cause friction on the sealing ring. At the same time, the sealing ring itself will age and wear faster, eventually leading to failure of the sealing ring and leakage of the conveyed medium, which will have a certain impact on production and life. Utility Model Content

[0004] The purpose of the present invention is to provide a new type of leak-proof valve with a reasonable design to solve the defects and shortcomings of the existing technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: it includes a valve body, wherein a water inlet and a water outlet are respectively opened at both ends of the valve body, a ball core is provided in the valve body, valve seats are respectively provided on both sides of the ball core, a valve shaft is connected to the top of the ball core, the valve shaft is rotatably installed in the valve body through a bearing, a double leak-proof structure is provided on the valve shaft, and a control handle is connected to the top of the valve shaft.

[0006] Preferably, the double leak-proof structure includes a movable ring arranged on the valve shaft, an annular groove is opened on the valve shaft, the movable ring is arranged in the annular groove, a sealing ring 1 is embedded on the outer side of the movable ring, and an air cushion is provided in the annular groove above the movable ring. The air cushion is annular, and the outer side of the air cushion is connected to a sealing ring 2.

[0007] Preferably, an air cavity is provided in the air cushion.

[0008] Preferably, a plurality of inner sealing rings are provided between the inner side of the movable ring and the valve shaft.

[0009] Preferably, the water inlet and the water outlet are respectively provided with internal threads.

[0010] Preferably, the surfaces of the valve shaft and the valve body are both provided with an anti-corrosion coating.

[0011] After adopting the above structure, the beneficial effects of the utility model are:

[0012] This device is provided with a movable ring and a sealing ring 1, which can automatically move upward when under pressure, and then push the sealing ring 2 through the air cushion to maintain the sealing effect. Even if the surfaces of the sealing ring 1 and the sealing ring 2 are worn to a certain extent, the sealing effect will not be affected, thereby extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection mode of the main control components in the utility model;

[0015] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0016] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0017] Description of reference numerals:

[0018] 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Ball core; 5. Valve shaft; 6. Control handle; 7. Valve seat; 8. Movable ring; 9. Sealing ring 1; 10. Inner sealing ring; 11. Air cushion; 12. Air cavity; 13. Sealing ring 2. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See Figure 1-Figure 3 As shown, it includes a valve body 1, with a water inlet 2 and a water outlet 3 respectively opened at both ends of the valve body 1, a ball core 4 is provided in the valve body 1, and valve seats 7 are respectively provided on both sides of the ball core 4. A valve shaft 5 is connected to the top of the ball core 4, and the valve shaft 5 is rotatably installed in the valve body 1 through a bearing. The valve shaft 5 is provided with a double leak-proof structure, and the top of the valve shaft 5 is connected to a control handle 6.

[0021] See Figures 1-4As shown, the double leak-proof structure includes a movable ring 8 provided on the valve shaft 5, an annular groove is provided on the valve shaft 5, and the movable ring 8 is provided in the annular groove. Several inner sealing rings 10 are provided between the inner side of the movable ring 8 and the valve shaft 5, and a sealing ring 1 9 is embedded on the outer side of the movable ring 8. An air cushion 11 is provided in the annular groove above the movable ring 8. The air cushion 11 is annular and has an air cavity 12 in it. The outer side of the air cushion 11 is connected to a sealing ring 2 13.

[0022] See Figure 3 As shown, the water inlet 2 and the water outlet 3 are respectively provided with internal threads;

[0023] The surfaces of the valve shaft 5 and the valve body 1 are both provided with an anti-corrosion coating.

[0024] The principle and use process of this utility model:

[0025] First, the internal threads of the water inlet 2 and the water outlet 3 make it easy for the user to install the valve in the designated position. Then, during use, the valve shaft 5 can be rotated by controlling the handle 6, which in turn drives the ball core 4 to rotate between the valve seats 7 on both sides, thereby cutting off or opening the medium supply in the valve.

[0026] During the switching process, a small amount of medium will flow upward from the gap and enter the gap between the valve shaft 5 and the valve body 1. As the number of switches increases and the valve seat 7 wears and ages, the amount of flowing medium will gradually increase. When the medium flows into the gap, the sealing ring 9, the movable ring 8 and the inner sealing ring 10 will first block the medium. At the same time, since the transported medium itself needs to be pressurized, the pressure below the movable ring 8 is relatively large. The pressure difference between the upper and lower parts of the movable ring 8 will drive the movable ring 8 to move upward, thereby generating pressure on the air cushion 11. The air cushion 11 After being subjected to longitudinal pressure, the valve 11 will expand longitudinally due to its own elasticity. At the same time, the presence of the air cavity 12 enhances the mobility of the air cushion 11, making it more sensitive to pressure deformation. The air cushion 11 pushes the sealing ring 13 outward, so that the sealing ring 13 is tightly attached to the valve body 1 to prevent leakage. During long-term use, the surfaces of the sealing ring 1 and the sealing ring 1 will be worn to a certain extent. Even if the sealing ring 1 fails, the air cushion 11 can continue to push the sealing ring 13 outward to maintain the seal and prevent the conveyed medium from leaking from the valve shaft 5.

[0027] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents of such scope and metes and bounds.

Claims

1. A novel leak-proof valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a water inlet (2) and a water outlet (3) at both ends thereof, a ball core (4) is provided in the valve body (1), valve seats (7) are provided on both sides of the ball core (4), a valve shaft (5) is connected above the ball core (4), the valve shaft (5) is rotatably mounted in the valve body (1) via a bearing, a double leak-proof structure is provided on the valve shaft (5), and a control handle (6) is connected to the top of the valve shaft (5); The double leak-proof structure includes a movable ring (8) arranged on the valve shaft (5), an annular groove is opened on the valve shaft (5), the movable ring (8) is arranged in the annular groove, a sealing ring (9) is embedded on the outer side of the movable ring (8), an air cushion (11) is arranged in the annular groove above the movable ring (8), the air cushion (11) is annular, and the outer side of the air cushion (11) is connected to a sealing ring (13).

2. A novel anti-leakage valve according to claim 1, characterized in that: An air cavity (12) is provided in the air cushion (11).

3. A novel anti-leakage valve according to claim 2, characterized in that: Several inner sealing rings (10) are provided between the inner side of the movable ring (8) and the valve shaft (5).

4. A novel anti-leakage valve according to claim 3, characterized in that: The water inlet (2) and the water outlet (3) are respectively provided with internal threads.

5. A novel anti-leakage valve according to claim 4, characterized in that: The surfaces of the valve shaft (5) and the valve body (1) are both provided with an anti-corrosion coating.

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