Semi-ball valve structure capable of adapting to high-temperature working condition medium

Abstract

A semi-ball valve structure capable of adapting to high-temperature working condition media comprises a valve body, an inlet and an outlet are formed in the two ends of the valve body respectively, a movable valve seat is arranged in the inlet, a positioning clamp spring is arranged on the inner side of the movable valve seat in the valve body, and an energy storage sealing ring, a pressing ring and a disc spring are sequentially arranged between the outer side of the movable valve seat and the valve body from inside to outside. A hollow hemisphere is arranged in the valve body, a sealing ring is arranged between the hollow hemisphere and the movable valve seat, and an annular groove matched with the sealing ring is formed in the movable valve seat. The novel semi-ball valve sealing structure is adopted, the appearance and the weight of the whole valve are greatly reduced, and therefore the machining and manufacturing cost of the valve is greatly reduced compared with a ball valve. The movable valve seat is of a movable structure, when the valve is closed, the disc spring drives the movable valve seat to press the hollow hemisphere, and sealing of the valve is guaranteed. Meanwhile, the movable valve seat and the valve body are sealed through an energy storage sealing ring, sealing is reliable, and the adaptive temperature range is wide.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to the structure of a central hemisphere valve with a movable valve seat, and especially to a hemisphere valve structure adaptable to high-temperature working conditions of media. Background Art

[0002] High-temperature valves are often used in heat supply pipe networks. The temperature of the medium at the primary hot water supply end of the heat source is generally 80 - 130 degrees. At such high temperatures, ordinary rubber parts cannot be used for the medium. For example, ordinary nitrile rubber can only be used below about 80 degrees. Therefore, medium and large-caliber ball valves are generally used in high-temperature environments. Since medium and large-caliber ball valves use a complete sphere, the valve has a large outer shape volume, heavy weight, and relatively high processing and manufacturing costs. In the prior art, a hemisphere valve adopts an eccentric hard seal structure and can adapt to high temperatures, but its sealing surface is prone to wear due to frequent opening and closing, resulting in valve leakage. Summary of the Invention

[0003] The purpose of the utility model is to provide a hemisphere valve structure adaptable to high-temperature working conditions of media. The hemisphere valve structure adaptable to high-temperature working conditions of media is to solve the technical problems that the sealing surface of the hemisphere valve in the prior art is prone to wear and ordinary rubber cannot adapt to high temperatures.

[0004] A hemisphere valve structure adaptable to high-temperature working conditions of media of the utility model includes a valve body. An inlet and an outlet are respectively arranged at both ends of the valve body. A movable valve seat is arranged in the inlet. A positioning snap ring is arranged inside the valve body on the inner side of the movable valve seat. A energy storage sealing ring, a pressure ring and a disc spring are sequentially arranged between the outer side of the movable valve seat and the valve body from inside to outside. A hollow hemisphere is arranged in the valve body. The outer spherical surface of the hollow hemisphere contacts the movable valve seat. A sealing ring is arranged between the hollow hemisphere and the movable valve seat. An annular groove for cooperating with the sealing ring is arranged in the movable valve seat. A dust-proof ring is also arranged between the movable valve seat and the valve body. The upper side of the hollow hemisphere is connected to the valve body through an upper valve stem. A first bearing is arranged between the upper valve stem and the valve body. The upper side of the valve body is connected with a valve cover through bolts. The upper valve stem passes upward through the valve cover and is connected with a driving mechanism. The lower side of the hollow hemisphere is connected to the valve body through a lower valve stem. A second bearing is arranged between the lower valve stem and the valve body. A bottom cover is arranged at the bottom of the valve body.

[0005] Further, a packing seat is arranged on the upper side of the valve cover. The upper valve stem passes upward through the packing seat and a packing, a packing plate and a packing gland are arranged between the upper valve stem and the packing seat.

[0006] Further, the driving mechanism is a worm head driving mechanism, and the worm head driving mechanism is installed on the valve cover through a bracket.

[0007] Further, a friction ring is arranged between the upper valve stem and the valve body.

[0008] Compared with the prior art, the effects of the present utility model are positive and obvious. To solve the problems of high cost of ball valves and wear of semi-spherical valves, the present utility model adopts a new sealing structure for semi-spherical valves. The hollow semi-spherical body is only 1 / 3 of a complete sphere, and the overall shape and weight of the whole valve are reduced a lot. Therefore, the manufacturing cost of the valve is much lower than that of ball valves. In addition, the hollow semi-spherical body is installed using a central structure without eccentricity, which is convenient for processing and installation. The movable valve seat adopts a movable structure. When the valve is closed, the disc spring drives the movable valve seat to press tightly against the hollow semi-spherical body to ensure the sealing of the valve. In addition, the sealing ring is made of filled PTFE material, with small frictional resistance, little wear after multiple openings and closings, and a long service life. At the same time, the sealing between the movable valve seat and the valve body adopts an energy storage sealing ring, with reliable sealing and a wide temperature adaptation range. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a schematic diagram of the structure of a semi-spherical valve capable of adapting to high-temperature working condition media of the present utility model.

[0010] Figure 2 is Figure 1 the first partial enlarged schematic diagram of.

[0011] Figure 3 is Figure 1 the second partial enlarged schematic diagram of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The present utility model will be further described below in conjunction with embodiments, but the present utility model is not limited to these embodiments. Any similar structures and similar changes using the present utility model should be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solution of the present utility model.

[0013] Such as Figures 1 - 3As shown in the figure, a hemispherical valve structure adaptable to high-temperature working condition media of the present utility model includes a valve body 2. Inlets and outlets are respectively arranged at both ends of the valve body 2. A movable valve seat 15 is arranged in the inlet. A positioning snap ring 13 is arranged inside the movable valve seat 15 in the valve body 2. An energy storage sealing ring 18, a pressure ring 17 and a disc spring 16 are sequentially arranged between the outer side of the movable valve seat 15 and the valve body 2 from inside to outside. A hollow hemisphere 3 is arranged in the valve body 2. The outer spherical surface of the hollow hemisphere 3 contacts the movable valve seat 15. A sealing ring 14 is arranged between the hollow hemisphere 3 and the movable valve seat 15. An annular groove for cooperating with the sealing ring 14 is arranged in the movable valve seat 15. A dust-proof ring 19 is also arranged between the movable valve seat 15 and the valve body 2. The upper side of the hollow hemisphere 3 is connected to the valve body 2 through an upper valve stem 4. A first bearing 5 is arranged between the upper valve stem 4 and the valve body 2. The upper side of the valve body 2 is connected with a valve cover 6 through bolts. The upper valve stem 4 passes upward through the valve cover 6 and is connected with a driving mechanism. The lower side of the hollow hemisphere 3 is connected to the valve body 2 through a lower valve stem 20. A second bearing (not shown in the figure) is arranged between the lower valve stem 20 and the valve body. A bottom cover 1 is arranged at the bottom of the valve body 2.

[0014] Further, a packing seat 7 is arranged on the upper side of the valve cover 6. The upper valve stem 4 passes upward through the packing seat 7, and a packing 8, a packing plate 9 and a packing gland 10 are arranged between the upper valve stem 4 and the packing seat 7.

[0015] Further, the driving mechanism is a turbine head driving mechanism 12, and the turbine head driving mechanism 12 is installed on the valve cover 6 through a bracket 11.

[0016] Further, a friction ring 21 is arranged between the upper valve stem 4 and the valve body 2.

[0017] Specifically, the positioning snap ring 13, the energy storage sealing ring 18, the pressure ring 17, the disc spring 16, the sealing ring 14, the dust-proof ring 19, the driving mechanism, the friction ring 21, etc. in this embodiment all adopt well-known solutions in the prior art, which are all understood by those skilled in the art and will not be elaborated here.

[0018] The working principle of this embodiment:

[0019] The present utility model is an upper-mounted hemispherical valve structure with an energy storage sealing ring 18 and a movable valve seat 15. The main improvements are as follows:

[0020] 1) The semi-spherical valve adopts the structure of a movable valve seat 15 with an energy storage sealing ring 18. The energy storage sealing ring 18 is arranged between the valve body 2 and the movable valve seat 15 to ensure the seal between the valve body 2 and the movable valve seat 15. It can not only adapt to high-temperature water medium but also make the movable friction resistance of the movable valve seat 15 small. The sealing element between the movable valve seat 15 and the hollow semi-sphere 3 is a sealing ring 14, which is made of reinforced PTFE material. Relying on the disc spring 16 behind the pressing ring 17, the movable valve seat 15 is pressed against the hollow semi-sphere 3 to ensure the seal between the movable valve seat 15 and the hollow semi-sphere 3. When the valve is opened, the hollow semi-sphere 3 disengages from the movable valve seat 15. To limit the movement range of the movable valve seat 15, a positioning circlip 13 is set.

[0021] 2) Adopting the structure of a hollow semi-sphere 3 with central symmetry reduces the size of the sphere, makes the valve structure compact, and greatly reduces the volume and weight compared with the existing ball valves, saving the processing and manufacturing costs of the valve. At the same time, using central symmetric parts simplifies the processing technology and improves the production efficiency of the valve.

[0022] 3) The first bearing 5 reduces the friction between the valve stem 4 and the valve body 2, and the rotational friction resistance is small. The material of the friction ring 21 is PTFE, which can greatly reduce the planar friction when the upper valve stem 4 rotates, so that the driving torque of the upper valve stem 4 is greatly reduced, and the service life of the valve is prolonged.

[0023] 4) A packing seat 7 is added separately. This part is fixed on the valve cover 6, which facilitates the replacement of the first bearing 5 and the packing 8, and greatly improves the maintenance performance of the valve.

[0024] 5) The structure of the top-mounted semi-spherical valve. By disassembling the valve cover 6, the internal parts of the valve can be repaired without removing the valve body, and the valve can be maintained online, which greatly improves the maintenance and repair of the valve and enhances the service performance of the valve.

[0025] In the upper-mounted semi-spherical valve body of the present utility model, an inner cavity of the inlet flange is provided with a movable valve seat 15 with a positioning circlip 13. The movable valve seat 15 is placed through the opening of the middle flange, positioned by the step of the valve body 2 on the outside, and blocked by the positioning circlip 13 on the inside. When the valve is closed, the hollow semi-sphere 3 presses the movable valve seat 15 to the outside of the inlet, and relies on the elastic force of the disc spring 16 to press the movable valve seat 15 against the hollow semi-sphere 3 to ensure the seal between the movable valve seat 15 and the hollow semi-sphere 3. The sealing ring 14 is installed in the annular groove of the movable valve seat 15, and is close to the hollow semi-sphere 3 on the outside. To ensure the long-term use performance of the energy storage sealing ring 18, dust-proof rings 19 are installed on the outer circles on both sides of the movable valve seat 15 to prevent sundries from entering the energy storage sealing ring 18. The energy storage sealing ring 18 can ensure the seal of high-temperature water medium and maintain low friction resistance at the same time.

[0026] The hollow hemisphere 3 is installed in the hemispherical valve body 2. There are a second bearing, a lower valve stem 20, a bottom cover 1, a bottom cover seal, etc. at the bottom of the hollow hemisphere 3. The second bearing is installed between the lower valve stem 20 and the valve body 2 to maintain low torque when the hemispherical valve is opened. When the valve is closed, the hollow hemisphere 3 contacts the sealing ring 14 of the movable valve seat 15. When the valve is opened, the hollow hemisphere 3 disengages from the sealing ring 14.

[0027] The valve cover 6 is installed on the upper part of the valve body 2. The packing seat 7 is on the valve cover 6. The upper valve stem 4 passes through the valve cover 6, the packing seat 7, and the bracket 11 and is connected to the worm head drive mechanism 12. The upper valve stem 4 is combined with the valve cover 6 through the first bearing 5 and the wear-reducing ring. The packing 8 is installed in the middle of the packing seat 7. The packing gland 10 presses the packing 8 to ensure the sealing of the upper valve stem 4. This structure not only ensures the rotational flexibility of the upper valve stem 4 at low torque but also ensures the convenient maintenance and repair of the hemispherical valve.

[0028] In order to solve the problems of high cost of ball valves and wear of hemispherical valves, the present utility model adopts a new sealing structure for the hemispherical valve. The hollow hemisphere 3 is only 1 / 3 of a complete sphere, and the overall shape and weight of the whole valve are reduced a lot. Therefore, the manufacturing cost of the valve is much lower than that of the ball valve. In addition, the hollow hemisphere 3 is installed in a central structure without eccentricity, which is convenient for processing and installation. The movable valve seat 15 adopts a movable structure. When the valve is closed, the disc spring 16 drives the movable valve seat 15 to press the hollow hemisphere 3 to ensure the valve sealing. In addition, the sealing ring 14 is made of filled PTFE material, with small frictional resistance, small wear after multiple openings and closings, and long service life. At the same time, the seal between the movable valve seat 15 and the valve body 2 adopts an energy storage sealing ring 18, with reliable sealing and a wide temperature adaptation range.

Claims

1. A hemispherical valve structure adaptable to high-temperature working condition media, characterized in that: It includes a valve body. An inlet and an outlet are respectively arranged at both ends of the valve body. A movable valve seat is arranged in the inlet. A positioning circlip is arranged inside the movable valve seat in the valve body. A energy storage sealing ring, a pressure ring and a disc spring are sequentially arranged from inside to outside between the outer side of the movable valve seat and the valve body. A hollow hemisphere is arranged in the valve body. The outer spherical surface of the hollow hemisphere contacts the movable valve seat. A sealing ring is arranged between the hollow hemisphere and the movable valve seat. An annular groove for cooperating with the sealing ring is arranged in the movable valve seat. A dust-proof ring is also arranged between the movable valve seat and the valve body. The upper side of the hollow hemisphere is connected to the valve body through an upper valve stem. A first bearing is arranged between the upper valve stem and the valve body. The upper side of the valve body is connected with a valve cover through bolts. The upper valve stem passes upward through the valve cover and is connected with a driving mechanism. The lower side of the hollow hemisphere is connected to the valve body through a lower valve stem. A second bearing is arranged between the lower valve stem and the valve body. A bottom cover is arranged at the bottom of the valve body.

2. The hemispherical valve structure adaptable to high-temperature working condition media according to claim 1, characterized in that: A packing seat is arranged on the upper side of the valve cover. The upper valve stem passes upward through the packing seat and packing, a packing plate and a packing gland are arranged between the upper valve stem and the packing seat.

3. A hemispherical valve structure adaptable to high-temperature working condition media according to claim 1, characterized in that: The driving mechanism is a worm head driving mechanism. The worm head driving mechanism is installed on the valve cover through a bracket.

4. A hemispherical valve structure adaptable to high-temperature working condition media according to claim 1, characterized in that: A friction ring is arranged between the upper valve stem and the valve body.

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