Valve with good leakproofness

Abstract

The utility model discloses a valve with good leakproofness, and relates to the technical field of valve structures, according to the valve with good leakproofness, the leakproofness of a valve core is improved through a sealing ring, the leakage condition at a gap at the upper end of the valve core is avoided, and the sealing performance of a valve closing structure is further improved by matching with a sealing strip; meanwhile, the sealing ring, the sealing strip and the sealing gasket are all made of silicon rubber materials, so that the sealing ring has excellent high and low temperature resistance, the sealing performance of the valve closing structure is prevented from being affected by temperature, leakage of mechanical sealing can be effectively prevented through the abrasion-resistant ring, and the sealing performance of the valve closing structure is improved. The abrasion resistance of the valve closing structure is enhanced, abrasion between parts is reduced, the situation of performance reduction is prevented, and the service life of the valve closing structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valve closing substructures, in particular to a valve with good airtightness. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. The valve closure structure is an important component of the valve, mainly controlling the opening and closing of the valve pipeline. The valve closure structure has an important influence on the various performances of the valve.

[0003] For example, the publication number CN2791393Y discloses a gas switch device closure structure, which includes a main body, a closure for controlling the gas flow rate, a large-diameter large-fire hole and a small-diameter small-fire hole radially arranged on the circumferential wall of the closure, and a variable-section groove arranged on the circumferential wall of the closure between the large-fire hole and the small-fire hole; the large-fire hole is used to allow a large flow of gas to flow into the closure so that the gas can be ignited smoothly, and the small-fire hole is used to reduce the gas flow rate so that the fire is stable. Since the closure can continue to transport gas from the large-fire hole to the small-fire hole without interruption through the guidance of the variable-section groove when it rotates, and can achieve an approximately linear adjustment, so that the fire can be in a stable state at any time.

[0004] After long-term use, the sealing structure of the existing valve closure structure is easily worn or affected by temperature, which leads to a decrease in the sealing performance of the valve closure structure, which is not conducive to the normal use of the valve closure structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a valve with good airtightness to solve the problem raised in the above background technology that after long-term use, the sealing structure of the valve closure structure is easily worn or affected by temperature, thereby causing the sealing performance of the valve closure structure to decrease, which is not conducive to the normal use of the valve closure structure.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a valve with good airtightness, comprising a valve housing, a valve cavity is arranged inside the valve housing, a valve core is fixedly installed inside the valve cavity, a cavity is opened on the inner side of the valve core, a lifting groove one is arranged inside the valve housing at the upper end of the valve core, a lifting groove two is opened on the upper end of the lifting groove one, a transmission rod is rotatably connected to the upper end of the valve housing, a threaded rod is fixedly installed on the inner side of the lifting groove two at the lower end of the transmission rod, a support rod is threadedly connected to the surface of the threaded rod, a limiting piece is fixedly installed on the upper side of the surface of the support rod, a valve plug is fixedly installed on the lower end of the support rod extending to the inner side of the lifting groove one, a sealing ring is fixedly installed on the upper end of the valve core, a sealing strip is fixedly installed on the side of the upper end of the lifting groove one, a sealing gasket is fixedly installed on the lower end of the valve plug, and wear-resistant rings are fixedly installed on the upper and lower sides of the inner surface of the valve core.

[0007] Preferably, both left and right ends of the cavity are connected to the valve cavity, and the upper end of the cavity is connected to the lifting slot 1.

[0008] Preferably, the lifting slot 1 and the support rod are both designed as square structures, and the lifting slot 1 is slidably connected to the support rod.

[0009] Preferably, the limiting member is slidably connected to the second lifting groove, and the inner diameter of the first lifting groove is smaller than the limiting member.

[0010] Preferably, the valve plug is slidably connected to the cavity, and the sealing ring, sealing strip and sealing gasket are all made of silicone rubber.

[0011] Preferably, the interior of the valve housing is provided with connecting ports at both left and right ends of the valve cavity, and a rotating handle is fixedly mounted on the upper end of the transmission rod.

[0012] Beneficial Effects

[0013] The utility model provides a valve with good airtightness. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The valve with good airtightness first drives the transmission rod to rotate by rotating the handle, so that the threaded rod drives the support rod to move up and down, and controls the size of the pipeline section connected to the valve closing structure by changing the position of the valve plug in the valve core, thereby completing the work of controlling the valve switch closing and adjusting the pipeline flow of the closing structure, which is beneficial to improving the flexibility and practicality of the valve closing structure.

[0015] 2. The valve with good airtightness improves the sealing performance of the valve core through the sealing ring to avoid leakage in the gap at the upper end of the valve core, and cooperates with the sealing strip to further improve the sealing performance of the valve closure structure, strengthen the sealing performance of the two lifting grooves, and form a multiple sealing structure of the valve closure. At the same time, the sealing ring, sealing strip and sealing gasket are all made of silicone rubber, which has excellent high and low temperature resistance, and avoids the sealing performance of the valve closure structure being affected by temperature. The wear-resistant ring can effectively prevent the leakage of the mechanical seal, enhance the wear resistance of the valve closure structure, reduce the wear between parts, prevent performance degradation, and help to increase the service life of the valve closure structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the valve core structure of the utility model.

[0019] In the figure: 1. valve body; 2. valve cavity; 3. valve core; 4. cavity; 5. lifting groove 1; 6. lifting groove 2; 7. transmission rod; 8. threaded rod; 9. support rod; 10. limiter; 11. valve plug; 12. sealing ring; 13. sealing strip; 14. sealing gasket; 15. wear-resistant ring; 16. connecting port; 17. turning handle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3The utility model provides a technical solution: a valve with good airtightness, including a valve housing 1, a valve cavity 2 is arranged inside the valve housing 1, a valve core 3 is fixedly installed inside the valve cavity 2, a cavity 4 is opened inside the valve core 3, a lifting groove 1 5 is arranged inside the valve housing 1 at the upper end of the valve core 3, a lifting groove 2 6 is opened at the upper end of the lifting groove 1 5, a transmission rod 7 is rotatably connected to the upper end of the valve housing 1, a threaded rod 8 is fixedly installed on the inner side of the lifting groove 2 6 at the lower end of the transmission rod 7, a support rod 9 is threadedly connected to the surface of the threaded rod 8, a limiting member 10 is fixedly installed on the upper side of the surface of the support rod 9, and the lower end of the support rod 9 extends to the inner side of the lifting groove 1 5 and a valve is fixedly installed Plug 11, both left and right ends of cavity 4 are connected to valve cavity 2, the upper end of cavity 4 is connected to lifting slot 1 5, lifting slot 1 5 and support rod 9 are both of square structure design, lifting slot 1 5 is slidably connected to support rod 9, limiter 10 is slidably connected to lifting slot 2 6, the inner diameter of lifting slot 1 5 is smaller than limiter 10, firstly, by rotating the handle 17 to drive the transmission rod 7 to rotate, so that the threaded rod 8 drives the support rod 9 to move up and down, and by changing the position of valve plug 11 in valve core 3, the size of the cross section of the pipeline connected to the valve closing structure is controlled, so as to complete the work of controlling the valve switch closing and adjusting the pipeline flow of the closing structure, which is conducive to improving the flexibility and practicality of the use of the valve closing structure;

[0022] A sealing ring 12 is fixedly installed on the upper end of the valve core 3, a sealing strip 13 is fixedly installed on the side of the upper end of the lifting groove 5, a sealing gasket 14 is fixedly installed on the lower end of the valve plug 11, and wear-resistant rings 15 are fixedly installed on the upper and lower sides of the inner surface of the valve core 3. The valve plug 11 is slidably connected with the cavity 4. The sealing ring 12, the sealing strip 13 and the sealing gasket 14 are all made of silicone rubber. The inside of the valve housing 1 is provided with connecting ports 16 at both ends of the left and right ends of the valve cavity 2. A rotating handle 17 is fixedly installed on the upper end of the transmission rod 7. The sealing ring 12 is used to improve the sealing performance of the valve core 3 to avoid leakage at the gap at the upper end of the valve core 3. Leakage, and cooperate with the sealing strip 13 to further improve the sealing performance of the valve closure structure, strengthen the sealing performance of the lifting groove 26, form a multiple sealing structure of the valve closure, and at the same time use the sealing ring 12, sealing strip 13 and sealing gasket 14 are all made of silicone rubber, with excellent high and low temperature resistance, to avoid the sealing performance of the valve closure structure being affected by temperature, through the wear-resistant ring 15, can effectively prevent the leakage of mechanical seal, enhance the wear resistance of the valve closure structure, reduce the wear between parts, prevent the performance degradation, which is beneficial to improve the service life of the valve closure structure.

[0023] During operation, the driving rod 7 is first driven to rotate by rotating the handle 17, so that the threaded rod 8 drives the supporting rod 9 to move up and down, and the size of the pipeline cross-section connected to the valve closure structure is controlled by changing the position of the valve plug 11 in the valve core 3, thereby completing the work of controlling the valve switch closure and adjusting the pipeline flow of the closure structure. The sealing ring 12 is used to improve the sealing performance of the valve core 3 to avoid leakage in the gap at the upper end of the valve core 3, and the sealing strip 13 is used to further improve the sealing performance of the valve closure structure, strengthen the sealing performance of the lifting groove 26, and form a multiple sealing structure of the valve closure. At the same time, the sealing ring 12, the sealing strip 13 and the sealing gasket 14 are all made of silicone rubber, which has excellent high and low temperature resistance, so as to avoid the sealing performance of the valve closure structure being affected by temperature. The wear-resistant ring 15 can effectively prevent the leakage of the mechanical seal, enhance the wear resistance of the valve closure structure, and reduce the wear between parts.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A valve with good airtightness, comprising a valve housing (1), characterized in that: The valve housing (1) is provided with a valve cavity (2) inside, a valve core (3) is fixedly installed inside the valve cavity (2), a cavity (4) is provided inside the valve core (3), a lifting groove (5) is provided inside the valve housing (1) at the upper end of the valve core (3), a lifting groove (6) is provided at the upper end of the lifting groove (5), a transmission rod (7) is rotatably connected to the upper end of the valve housing (1), a threaded rod (8) is fixedly installed at the lower end of the transmission rod (7) extending to the inner side of the lifting groove (6), and the threaded rod (8) is fixedly installed thereon. The surface of the valve body (8) is threadedly connected to a support rod (9), a limiting member (10) is fixedly installed on the upper side of the surface of the support rod (9), the lower end of the support rod (9) extends to the inner side of the lifting groove (5) and a valve plug (11) is fixedly installed, the upper end of the valve core (3) is fixedly installed with a sealing ring (12), the side of the upper end of the lifting groove (5) is fixedly installed with a sealing strip (13), the lower end of the valve plug (11) is fixedly installed with a sealing gasket (14), and the upper and lower sides of the inner surface of the valve core (3) are fixedly installed with wear-resistant rings (15).

2. A valve with good airtightness according to claim 1, characterized in that: The left and right ends of the cavity (4) are connected to the valve cavity (2), and the upper end of the cavity (4) is connected to the lifting groove (5).

3. A valve with good airtightness according to claim 2, characterized in that: The lifting slot 1 (5) and the support rod (9) are both designed as square structures, and the lifting slot 1 (5) and the support rod (9) are slidably connected.

4. A valve with good airtightness according to claim 3, characterized in that: The limiting member (10) is slidably connected to the second lifting groove (6), and the inner diameter of the first lifting groove (5) is smaller than the limiting member (10).

5. A valve with good airtightness according to claim 1, characterized in that: The valve plug (11) is slidably connected to the cavity (4), and the sealing ring (12), sealing strip (13) and sealing pad (14) are all made of silicone rubber.

6. A valve with good airtightness according to claim 1, characterized in that: The valve housing (1) is provided with connection ports (16) at both left and right ends of the valve cavity (2), and a rotating handle (17) is fixedly mounted on the upper end of the transmission rod (7).

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