Full-bore floating metal-sealed high-temperature and high-pressure ball valve

Abstract

The present invention belongs to the technical field of ball valves, and discloses a full-bore floating metal-sealed high-temperature and high-pressure ball valve, which includes: a valve body, a ball and a valve seat located in the valve body, valve covers are connected to both ends of the valve body, the valve seat is installed inside the valve cover, a valve stem connected to the ball is installed at the top of the valve body through a packing, and a temperature reduction and pressure reduction assembly is further included. By setting a temperature reduction and pressure reduction assembly on the valve cover, which is composed of a heat exchange flow channel and a heat exchange box, the heat exchange flow channel is arranged inside the valve cover and corresponds to the position of the valve seat seal ring. Under normal conditions, the cooling water in the heat exchange box fills the heat exchange flow channel. After the cooling water in the heat exchange flow channel is heated, it will flow into the heat exchange box, and after being cooled by the refrigeration part in the heat exchange box, it will flow back to the heat exchange flow channel again. Such a cycle can cool the valve cover, thereby cooling the valve seat seal ring, improving the anti-aging performance of the valve seat seal ring, and thus increasing the service life of the ball valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of ball valves, and particularly relates to a full-bore floating metal-sealed high-temperature and high-pressure ball valve. Background Art

[0002] The floating ball valve structure adopts a floating valve ball, and the valve ball is an O-shaped ball, which has the characteristics of stable opening and closing performance and good sealing effect. When the medium flows in both forward and reverse directions, the valve ball is also pressed in the direction of the medium flow, achieving a two-way sealing effect. As the pressure increases, the ball presses the valve seat more tightly, and the sealing is better. Simply put, the floating ball valve ball can freely float inside to seal with the medium, so it is called a floating ball valve. This ball valve is generally applicable to occasions with small diameters and pressures less than 100 kg for opening and closing.

[0003] Currently, in ball valves, an O-ring is mostly provided on the valve seat to seal the gap between the ball and the valve cover. The O-ring will accelerate aging under long-term high-pressure and high-temperature conditions, easily resulting in low pressure resistance of the ball valve during use, making its practicability low during use, the sealing effect of the ball valve not lasting long during use, and making it extremely inconvenient during use, thus shortening the service life of the ball valve. Summary of the Invention

[0004] The purpose of the present invention is to provide a full-bore floating metal-sealed high-temperature and high-pressure ball valve to solve the problems in the prior art mentioned in the above background art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The full-bore floating metal-sealed high-temperature and high-pressure ball valve includes: a valve body, a ball and a valve seat located in the valve body, valve covers are connected to both ends of the valve body, the valve seat is installed inside the valve cover, a valve stem connected to the ball is installed at the top of the valve body through packing, and a temperature reduction and pressure reduction component is further included;

[0007] The temperature reduction and pressure reduction component includes a heat exchange flow channel and a heat exchange box, and the heat exchange flow channel communicates between the inside of the heat exchange box and the inside of the valve cover.

[0008] Further, the heat exchange flow channel includes:

[0009] An annular channel and a through pipe communicating with the annular channel, the annular channel is opened in the valve cover, and the end of the through pipe is connected to the heat exchange box.

[0010] Further, the annular channel corresponds to the position of the O-ring outside the valve seat.

[0011] Further, the through pipe includes an upper through pipe and a lower through pipe; one ends of the upper through pipe and the lower through pipe are respectively communicated with the upper part and the lower part of the heat exchange box and are connected by a fixing component; the other ends of the upper through pipe and the lower through pipe are respectively communicated with the upper part and the lower part of the annular channel.

[0012] Further, the heat exchange box includes:

[0013] a box body and a refrigerating part located in the box body. The box body is filled with cooling water, and the liquid level submerges the pipe orifices of the upper through pipe and the lower through pipe, and a space is reserved in the box body. The refrigerating part is used for cooling the cooling water;

[0014] a water injection hole and a drain hole are respectively formed in the top and the bottom of the box body, and plugs are connected in both the water injection hole and the drain hole.

[0015] Further, the refrigerating part includes:

[0016] a heat insulation board and fins arranged on the heat insulation board. The outer end of the fin is connected with a semiconductor refrigerating sheet, and through holes are formed in the inner surface of the fin.

[0017] Further, the heat exchange box further includes a dust-proof box cover, and a heat dissipation fan is installed on the inner side of the dust-proof box cover.

[0018] Further, the fixing component includes:

[0019] a fixing frame and a locking part connected to the fixing frame. The locking part includes a locking bolt and a fixing block with a threaded hole. The fixing block is fixed on the edges of the box body and the fixing frame, and a through hole matching the through pipe is formed on the surface of the fixing frame.

[0020] Further, the fixing component further includes a limiting plate. The limiting plate is fixed on the outside of the through pipe, and a sealing gasket is adhered to the surface of the limiting plate. A butt joint hole matching the through pipe is formed on the surface of the box body.

[0021] Further, a valve rod limiting component is further included. The valve rod limiting component includes a valve handle, a limiting piece, a first valve cover and a limiting bolt; the limiting piece is fixed at the bottom of the valve handle, the limiting bolt is connected in the first valve cover, two stoppers arranged at a ninety-degree angle are arranged on the limiting piece, and the stoppers cooperate with the limiting bolt to limit the rotation angle of the valve handle.

[0022] The technical effects and advantages of the present invention: The full-bore floating metal-sealed high-temperature and high-pressure ball valve proposed by the present invention has the following advantages compared with the prior art:

[0023] In the present invention, a temperature reduction and pressure reduction component is provided on the valve cover, which is composed of a heat exchange flow channel and a heat exchange box. The heat exchange flow channel is arranged inside the valve cover and corresponds to the position of the valve seat sealing ring. Under normal conditions, the cooling water in the heat exchange box fills the heat exchange flow channel. After the cooling water in the heat exchange flow channel is heated, it will flow into the heat exchange box, be cooled by the refrigeration part in the heat exchange box, and then flow back into the heat exchange flow channel. Such a cycle can cool the valve cover, thereby cooling the valve seat sealing ring, improving the anti-aging performance of the valve seat sealing ring, and thus increasing the service life of the ball valve. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic structural diagram of the heat exchange box of the present invention;

[0026] Figure 3 is a schematic structural diagram of the annular channel of the present invention;

[0027] Figure 4 is a schematic structural diagram of the box body of the present invention;

[0028] Figure 5 is a schematic structural diagram of the fin of the present invention;

[0029] Figure 6 is a schematic structural diagram of the fixing component of the present invention;

[0030] Figure 7 is a schematic structural diagram of the valve stem limiting component of the present invention.

[0031] In the figure:

[0032] 1, valve body; 2, valve stem; 3, valve cover; 4, valve seat; 5, temperature reduction and pressure reduction component; 6, heat exchange flow channel; 601, annular channel; 602, through pipe; 603, upper through pipe; 604, lower through pipe; 7, heat exchange box; 701, box body; 702, refrigeration part; 703, heat insulation board; 704, fin; 705, semiconductor refrigeration sheet; 706, through hole; 707, dust-proof box cover; 708, cooling fan; 709, water injection hole; 710, drain hole; 711, plug; 712, docking hole; 8, fixing component; 801, fixing frame; 802, locking part; 803, fixing block; 804, locking bolt; 805, through hole; 806, limiting plate; 807, sealing gasket; 9, valve stem limiting component; 901, valve handle; 902, limiting piece; 903, valve cover one; 904, limiting bolt; 905, stop block. Detailed Embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0034] The present invention provides a full-bore floating metal-sealed high-temperature and high-pressure ball valve in an embodiment. Exemplarily, as Figure 1 Figure 2 shown, it includes components such as a valve body 1, a ball, a valve stem 2, a valve cover 3, a valve seat 4, and a cooling and pressure-reducing component 5. Among them, the ball and the valve seat 4 are connected in the valve body 1. Both ends of the valve body 1 are connected to the valve cover 3. The valve seat 4 is installed inside the valve cover 3. The valve stem 2 connected to the ball is installed at the top of the valve body 1 through a packing. Some other basic components are also involved in the ball valve. The connection relationships between the components can refer to the prior art and will not be elaborated here. In this embodiment, mainly a cooling and pressure-reducing component 5 is provided on the valve cover to cool the valve seat seal ring, thereby solving the problem that the seal ring is prone to aging.

[0035] Specifically, as Figure 2 Figure 6 shown, the above-mentioned cooling and pressure-reducing component 5 includes a heat exchange flow path 6 and a heat exchange box 7. The heat exchange flow path 6 communicates between the inside of the heat exchange box 7 and the inside of the valve cover 3. Under normal conditions, the cooling water in the heat exchange box 7 fills the heat exchange flow path 6. After the cooling water in the heat exchange flow path 6 is heated, it will flow into the heat exchange box 7, and after being cooled by the refrigeration part 702 in the heat exchange box 7, it will flow back to the heat exchange flow path 6. Such a cycle can cool the valve cover 3, thereby cooling the valve seat seal ring, improving the anti-aging performance of the valve seat seal ring, and thus increasing the service life of the ball valve.

[0036] The heat exchange flow path 6 includes: an annular channel 601 and a through pipe 602 communicating with the annular channel 601. The annular channel 601 is opened in the valve cover 3. The end of the through pipe 602 is connected to the heat exchange box 7. The annular channel 601 corresponds to the position of the seal ring outside the valve seat 4, and the center of the annular channel 601 coincides with the center of the valve cover 3, which is beneficial to improving the cooling efficiency of the seal ring. Among them, the through pipe 602 includes: an upper through pipe 603 and a lower through pipe 604; one ends of the upper through pipe 603 and the lower through pipe 604 are respectively communicated with the upper part and the lower part of the heat exchange box 7 and are connected by a fixing component 8; the other ends of the upper through pipe 603 and the lower through pipe 604 are respectively communicated with the upper part and the lower part of the annular channel 601.

[0037] The heat exchange box 7 includes: a box body 701 and a refrigerating part 702 located in the box body 701. The box body 701 is filled with cooling water, and the liquid level submerges the pipe orifices of the upper connecting pipe 603 and the lower connecting pipe 604, and a space is reserved in the box body 701. The refrigerating part 702 is used for cooling the cooling water.

[0038] Specifically, the box body 701, the lower connecting pipe 604, the annular channel 601, and the upper connecting pipe 603 can form a circulating water path. After the cooling water is heated, the air pressure in the box body 701 increases, and the cooled cold water in the box body 701 can be squeezed into the lower connecting pipe 604 and enter the annular channel 601. The hot water in the annular channel 601 can be squeezed through the upper connecting pipe 603 into the box body 701. In this way, circulation can play a role in continuous cooling.

[0039] The refrigerating part 702 includes: a heat insulation plate 703 and fins 704 arranged on the heat insulation plate 703. The outer end of the fin 704 is connected with a semiconductor refrigerating sheet 705, and through holes 706 are formed on the inner surface of the fin 704.

[0040] A sealing structure is arranged between the heat insulation plate 703 and the box body 701, which is beneficial to maintaining the air pressure in the box body 701. The fins 704 are used for conducting heat. The semiconductor refrigerating sheet 705 cools the cooling water through the fins 704. The through holes 706 are beneficial to the flow of the cooling water and improve the cooling effect. In addition, the semiconductor refrigerating sheet 705 can be powered by a mobile power source, an external power source, or solar energy.

[0041] For the convenience of water injection and drainage, a water injection hole 709 and a drainage hole 710 are respectively arranged at the top and bottom of the box body 701, and plugs 711 are connected to both the water injection hole 709 and the drainage hole 710. For dust prevention and heat dissipation, the heat exchange box 7 further includes a dust-proof box cover 707, and a heat dissipation fan 708 is installed on the inner side of the dust-proof box cover 707.

[0042] For the convenience of connecting the connecting pipe 602 and the box body 701, the above-mentioned fixing assembly 8 includes: a fixing frame 801 and a locking member 802 connected to the fixing frame 801. The locking member 802 includes a locking bolt 804 and a fixing block 803 with a threaded hole. The fixing block 803 is fixed at the edges of the box body 701 and the fixing frame 801. A through hole 805 matching the connecting pipe 602 is formed on the surface of the fixing frame 801. When connecting the connecting pipe 602 and the box body 701, the fixing frame 801 is sleeved outside the connecting pipe 602 through the through hole 805, and then the fixing frame 801 and the box body 701 are fixed together by the locking bolt 804, so as to enable rapid installation.

[0043] In addition, the fixing component 8 further includes: a limiting plate 806, which is fixed outside the through pipe 602, and a sealing gasket 807 is adhered to the surface of the limiting plate 806. A docking hole 712 matching the through pipe 602 is formed on the surface of the box body 701. The docking hole 712 facilitates the docking of the through pipe 602 and the box body 701. The limiting plate 806 can limit the position of the through pipe 602, and the sealing gasket 807 facilitates maintaining the sealing performance between the through pipe 602 and the docking hole 712. Embodiment 2

[0044] As Figure 7 shown, in this embodiment, it includes a valve stem limiting component 9 for limiting the angle of the valve stem 2, thereby limiting the rotation angle of the sphere. The valve stem limiting component 9 includes a valve handle 901, a limiting piece 902, a first valve cover 903, and a limiting bolt 904; the limiting piece 902 is fixed to the bottom of the valve handle 901, the limiting bolt 904 is connected in the first valve cover 903, and two stoppers 905 arranged at 90 degrees are provided on the limiting piece 902, and the stoppers 905 cooperate with the limiting bolt 904 to limit the rotation angle of the valve handle 901.

[0045] Through the arrangement of the limiting piece 902 and the limiting bolt 904, when the valve handle 901 is rotated, the stopper 905 on the limiting piece 902 is restricted by the limiting bolt 904 and will not rotate continuously, and thus the rotation angles of the valve stem 2 and the sphere can be controlled.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Full-bore floating metal-sealed high-temperature and high-pressure ball valve, comprising: a valve body (1), and a ball and a valve seat (4) located in the valve body (1). Both ends of the valve body (1) are connected with valve covers (3). The valve seat (4) is installed inside the valve cover (3). The top of the valve body (1) is provided with a valve stem (2) connected to the ball through a packing. It is characterized in that: it further comprises a temperature reduction and pressure reduction assembly (5); The temperature reduction and pressure reduction assembly (5) comprises a heat exchange flow channel (6) and a heat exchange box (7). The heat exchange flow channel (6) communicates between the inside of the heat exchange box (7) and the inside of the valve cover (3); The heat exchange flow channel (6) comprises: an annular channel (601) and a through pipe (602) communicating with the annular channel (601). The annular channel (601) is opened in the valve cover (3). The end of the through pipe (602) is connected to the heat exchange box (7). The annular channel (601) corresponds to the position of the sealing ring outside the valve seat (4); The through pipe (602) comprises: an upper through pipe (603) and a lower through pipe (604); One ends of the upper through pipe (603) and the lower through pipe (604) are respectively communicated with the upper part and the lower part of the heat exchange box (7) and are connected through a fixing assembly (8); The other ends of the upper through pipe (603) and the lower through pipe (604) are respectively communicated with the upper part and the lower part of the annular channel (601); The heat exchange box (7) comprises: a box body (701) and a refrigeration part (702) located in the box body (701). The box body (701) is filled with cooling water, and the liquid level submerges the pipe orifices of the upper through pipe (603) and the lower through pipe (604), and a space is reserved in the box body (701). The refrigeration part (702) is used for cooling the cooling water; The top and bottom of the box body (701) are respectively provided with a water injection hole (709) and a drain hole (710), and plugs (711) are connected in both the water injection hole (709) and the drain hole (710); The refrigeration part (702) comprises: a heat insulation plate (703) and fins (704) arranged on the heat insulation plate (703). The outer end of the fin (704) is connected with a semiconductor refrigeration sheet (705). The inner surface of the fin (704) is provided with through holes (706); The heat exchange box (7) further comprises a dust-proof box cover (707), and a heat dissipation fan (708) is installed on the inner side of the dust-proof box cover (707).

2. The full-bore floating metal-sealed high-temperature and high-pressure ball valve according to claim 1, characterized in that: The fixing assembly (8) comprises: a fixing frame (801) and a locking part (802) connected to the fixing frame (801). The locking part (802) comprises a locking bolt (804) and a fixing block (803) with a threaded hole. The fixing block (803) is fixed on the edges of the box body (701) and the fixing frame (801). A through hole (805) matching the through pipe (602) is opened on the surface of the fixing frame (801).

3. The full-bore floating metal-sealed high-temperature and high-pressure ball valve according to claim 2, characterized in that: the fixed assembly (8) further includes a limit plate (806), the limit plate (806) is fixed outside the through pipe (602), and a sealing gasket (807) is adhered to the surface of the limit plate (806), and a docking hole (712) matching the through pipe (602) is formed in the surface of the box body (701).

4. The full-bore floating metal-sealed high-temperature and high-pressure ball valve according to claim 1, characterized in that: it further includes a valve stem limit assembly (9), and the valve stem limit assembly (9) includes a valve handle (901), a limit piece (902), a first valve cover (903) and a limit bolt (904); the limit piece (902) is fixed at the bottom of the valve handle (901), the limit bolt (904) is connected in the first valve cover (903), two stoppers (905) arranged at 90 degrees are provided on the limit piece (902), and the stoppers (905) cooperate with the limit bolt (904) to limit the rotation angle of the valve handle (901).

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