Hard sealing fixed ball valve

Abstract

The utility model relates to the technical field of ball valves, and provides a hard sealing fixed ball valve which comprises a first valve body and a wear-resisting structure, and a second valve body is installed at one end of the first valve body. The wear-resistant structure is arranged, the coating with special wear-resistant hardening is coated on the outer side of the valve ball, and the coating is actually a tungsten carbide coating, so that the wear-resistant ball valve has the advantages of high hardness, wear resistance, high temperature resistance and the like, and the long service life of the valve ball in an oxygen working condition is ensured; the abrasion-resistant shaft sleeve is an aluminum alloy-based abrasion-resistant shaft sleeve and has the advantages of being good in abrasion resistance, high in strength, good in corrosion resistance and the like, the problem that a common shaft sleeve is peeled off under the oxygen working condition to cause serious fire disasters is solved, meanwhile, when the valve ball rotates, the pressure applying ring applies pressure to the pressing ring to act on the valve seat, the pre-tightening force of the valve seat is provided by the pressure applying ring, and the service life of the valve ball is prolonged. The pressing ring is actually a spiral spring, so that thrust can be applied to the valve seat all the time, and the sealing performance of the valve seat is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a hard-seal fixed ball valve. Background Technology

[0002] When oxygen valves are not properly selected or designed, small, easily ignitable objects, such as particles generated by minute dynamic friction, can easily accumulate inside the valve. However, a hard-seal fixed ball valve, through its unique structural design and the selection of wear-resistant materials, greatly avoids the generation of these small particles, thereby ensuring the safety of the valve and adjacent pipelines and equipment. Utility Model Content

[0003] The purpose of this invention is to provide a hard-seal fixed ball valve to solve the problem that existing fixed ball valves are not wear-resistant.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a hard-seal fixed ball valve, comprising a first valve body and a wear-resistant structure;

[0005] A second valve body is installed at one end of the first valve body. First mounting bolts are evenly installed inside the first valve body and the second valve body. A first fixing nut is installed on the outside of the first mounting bolt. A sealing seat is installed on the top side of the first valve body. A sealing structure is installed inside the sealing seat.

[0006] The first and second valve bodies are internally equipped with wear-resistant structures, which include a valve ball, an upper valve stem, a valve stem seat, a wear-resistant bushing, a bearing, a second sealing ring, a third sealing gasket, a valve seat, a graphite ring, a pressure ring, and a pressure ring. The valve ball is installed inside the first and second valve bodies. An upper valve stem is installed at the top of the valve ball, and valve stem seats are installed at both ends of the valve ball. A wear-resistant bushing is installed on the outer side of the upper valve stem inside the valve stem seat. A bearing is installed on the outer side of the upper valve stem inside the first valve body. A second sealing ring is provided at the bottom of the bearing, and a third sealing gasket is provided at both ends of the second sealing ring. A valve seat is installed on the outer side of the valve ball. A graphite ring is provided at the top of the valve seat, and a pressure ring is installed on the outer side of the valve seat. A pressure ring is fixed on one side of the pressure ring.

[0007] Preferably, one end of the first mounting bolt extends through one side of the second valve body into the interior of the first valve body. The outer sides of the first mounting bolts inside the first and second valve bodies are provided with matching internal threads. The first mounting bolts are distributed at equal intervals inside the first and second valve bodies. The first and second valve bodies are fixedly connected by the first mounting bolts and the first fixing nut.

[0008] Preferably, the sealing structure includes a mounting base, a second mounting bolt, a second fixing nut, a rotating block, a stuffing box, a gland, sealing packing, a first sealing gasket, a first sealing ring, a second sealing gasket, and fixing bolts. The mounting base is installed on the top of the sealing seat. The second mounting bolts are evenly installed inside the mounting base, and the second fixing nut is installed on the outside of the second mounting bolts. The rotating block is installed on the top of the mounting base. A stuffing box is provided inside the sealing seat. A gland is provided on the top of the stuffing box. Sealing packing is provided at the bottom of the gland inside the stuffing box. A first sealing gasket is provided at the bottom of the stuffing box. A first sealing ring and a second sealing gasket are distributed at the bottom of the sealing seat inside the first valve body. Fixing bolts are evenly installed on the top of the sealing seat.

[0009] Preferably, the bottom end of the second mounting bolt extends through the bottom end of the sealing seat into the interior of the sealing seat and forms a threaded connection with the interior of the sealing seat. The mounting seat and the sealing seat are fixedly connected by the second mounting bolt and the second fixing nut.

[0010] Preferably, the sealing seat is fixedly connected to the first valve body by fixing bolts, and the sealing seat and the first valve body are sealed together by a first sealing ring and a second sealing gasket.

[0011] Preferably, the outer side of the valve ball is coated with a tungsten carbide coating, the wear-resistant bushing is an aluminum alloy-based wear-resistant bushing, and the upper valve stem is rotatably connected inside the wear-resistant bushing.

[0012] Preferably, the upper valve stem and the first valve body are sealed together by a second sealing ring and a third sealing gasket, the inner side of the pressure ring abuts against the outer side of the valve seat, and the pressure ring is a helical spring.

[0013] The present invention provides a hard-seal fixed ball valve, which has the following advantages: the hard-seal fixed ball valve adopts a wear-resistant structure. By applying a special wear-resistant hardening coating to the outside of the valve ball, the overall wear resistance of the valve ball is improved. At the same time, by setting a wear-resistant bushing, the problem of ordinary bushings peeling off in oxygen conditions, which could lead to serious fires, is avoided. The generation of fine particles is greatly reduced, thereby ensuring the safety of the valve and adjacent pipelines and equipment.

[0014] By incorporating a sealing structure, the mounting seat and sealing seat are fixedly connected using a second mounting bolt and a second fixing nut. This allows the mounting seat to press the gland tightly, ensuring that the sealing packing inside the stuffing box does not leak out. This prevents leakage caused by a loose gland or loose sealing packing, guaranteeing the long-term effective sealing of the sealing packing. Furthermore, the first sealing gasket further seals the sealing packing, resulting in a better sealing effect. Simultaneously, the first sealing ring and the second sealing gasket effectively seal the sealing seat and the first valve body, preventing the medium from leaking out from the connection between the sealing seat and the first valve body when the rotating block drives the upper valve stem to rotate, thus achieving a good sealing effect.

[0015] By incorporating a wear-resistant structure and applying a special wear-resistant hardening coating (actually tungsten carbide coating) to the outer side of the valve ball, which boasts high hardness, wear resistance, and high-temperature resistance, the valve ball's long service life in oxygen conditions is ensured. Simultaneously, a wear-resistant bushing is installed between the upper valve stem and the valve stem seat. This aluminum alloy-based wear-resistant bushing offers excellent wear resistance, high strength, and corrosion resistance, preventing the problem of ordinary bushings peeling off in oxygen conditions and causing serious fires. Furthermore, as the valve ball rotates, the pressure ring applies pressure to the valve seat, with the preload force provided by the pressure ring (actually a helical spring). This ensures a constant thrust on the valve seat, guaranteeing its sealing performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a side sectional view of the present invention.

[0018] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B;

[0020] Figure 5 This is a front view structural diagram of the present invention.

[0021] The reference numerals in the figure are as follows: 1. First valve body; 2. Second valve body; 3. First mounting bolt; 4. First fixing nut; 5. Sealing seat; 6. Sealing structure; 601. Mounting seat; 602. Second mounting bolt; 603. Second fixing nut; 604. Rotating block; 605. Stuffing gland; 606. Gland; 607. Sealing packing; 608. First sealing gasket; 609. First sealing ring; 610. Second sealing gasket; 611. Fixing bolt; 7. Wear-resistant structure; 701. Valve ball; 702. Upper valve stem; 703. Valve stem seat; 704. Wear-resistant bushing; 705. Bearing; 706. Second sealing ring; 707. Third sealing gasket; 708. Valve seat; 709. Graphite ring; 710. Pressure ring; 711. Pressure ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] See also Figure 1-5 The present invention provides a hard-seal fixed ball valve, comprising a first valve body 1 and a wear-resistant structure 7.

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, a second valve body 2 is installed at one end of a first valve body 1. First mounting bolts 3 are evenly installed inside both the first and second valve bodies 1 and 2. One end of each first mounting bolt 3 extends through one side of the second valve body 2 into the interior of the first valve body 1. Matching internal threads are provided on the outer sides of the first mounting bolts 3 inside both the first and second valve bodies 1 and 2. The first mounting bolts 3 are evenly distributed inside both the first and second valve bodies 1 and 2. A first fixing nut 4 is installed on the outer side of each first mounting bolt 3. The first valve body 1 and the second valve body 2 are fixedly connected by the first mounting bolts 3 and the first fixing nut 4. A sealing seat 5 is installed on the top side of the first valve body 1. A sealing structure 6 is installed inside the sealing seat 5. The sealing structure 6 includes a mounting base 601, a second mounting bolt 602, a second fixing nut 603, a rotating block 604, a stuffing box 605, a gland 606, sealing packing 607, a first sealing gasket 608, a first sealing ring 609, a second sealing gasket 610, and a fixing bolt 611. The mounting base 601 is installed on the top of the sealing seat 5. The first valve body 601 has a second mounting bolt 602 evenly installed inside, and a second fixing nut 603 installed on the outside of the second mounting bolt 602. A rotating block 604 is installed on the top of the mounting base 601. A stuffing box 605 is provided inside the sealing seat 5. A gland 606 is provided on the top of the stuffing box 605. A sealing packing 607 is provided at the bottom of the gland 606 inside the stuffing box 605. A first sealing gasket 608 is provided at the bottom of the stuffing box 605. A first sealing ring 609 and a second sealing ring 609 are distributed at the bottom of the sealing seat 5 inside the first valve body 1. Two sealing gaskets 610, and fixing bolts 611 are evenly installed on the top of the sealing seat 5. The bottom end of the second mounting bolt 602 passes through the bottom end of the sealing seat 5 and extends into the interior of the sealing seat 5, forming a threaded connection with the interior of the sealing seat 5. The mounting seat 601 is fixedly connected to the sealing seat 5 by the second mounting bolt 602 and the second fixing nut 603. The sealing seat 5 is fixedly connected to the first valve body 1 by the fixing bolt 611. The sealing seat 5 and the first valve body 1 are sealed together by the first sealing ring 609 and the second sealing gasket 610.

[0025] By fixing the mounting base 601 and the sealing seat 5 together with the second mounting bolt 602 and the second fixing nut 603, the mounting base 601 presses the gland 606 tightly, thereby ensuring that the sealing packing 607 inside the stuffing box 605 will not leak out. This avoids leakage caused by the loosening of the gland 606 or the sealing packing 607, ensuring the long-term effective sealing of the sealing packing 607. Furthermore, by setting the first sealing gasket 608, the sealing packing 607 is further sealed, resulting in a better sealing effect. At the same time, by setting the first sealing ring 609 and the second sealing gasket 610, the sealing seat 5 and the first valve body 1 are effectively sealed, thereby preventing the medium from leaking out from the connection between the sealing seat 5 and the first valve body 1 when the rotating block 604 drives the upper valve stem 702 to rotate, thus achieving a good sealing effect.

[0026] Reference Figures 2-4 As shown, a wear-resistant structure 7 is installed inside the first valve body 1 and the second valve body 2. The wear-resistant structure 7 includes a valve ball 701, an upper valve stem 702, a valve stem seat 703, a wear-resistant bushing 704, a bearing 705, a second sealing ring 706, a third sealing gasket 707, a valve seat 708, a graphite ring 709, a pressure ring 710, and a pressure ring 711. The valve ball 701 is installed inside the first valve body 1 and the second valve body 2. The upper valve stem 702 is installed at the top of the valve ball 701. Valve stem seats 703 are installed at both ends of the valve ball 701. A wear-resistant bushing 704 is installed inside the valve stem seat 703 on the outside of the upper valve stem 702. A bearing 705 is installed inside the first valve body 1 on the outside of the upper valve stem 702. The bottom end of the bearing 705... A second sealing ring 706 is provided, and a third sealing gasket 707 is provided at both ends of the second sealing ring 706. A valve seat 708 is installed on the outside of the valve ball 701, and a graphite ring 709 is provided at the top of the valve seat 708. A pressure ring 710 is installed on the outside of the valve seat 708, and a pressure ring 711 is fixed on one side of the pressure ring 710. The outside of the valve ball 701 is coated with a tungsten carbide coating. The wear-resistant bushing 704 is an aluminum alloy-based wear-resistant bushing. The upper valve stem 702 is rotatably connected inside the wear-resistant bushing 704. The upper valve stem 702 and the first valve body 1 are sealed together by the second sealing ring 706 and the third sealing gasket 707. The inner side of the pressure ring 710 abuts against the outer side of the valve seat 708. The pressure ring 711 is a helical spring.

[0027] By applying a special wear-resistant and hardened coating, actually a tungsten carbide coating, to the outside of the valve ball 701, which has advantages such as high hardness, wear resistance, and high temperature resistance, the long service life of the valve ball 701 in oxygen conditions is ensured. At the same time, by setting a wear-resistant bushing 704 between the upper valve stem 702 and the valve stem seat 703, the wear-resistant bushing 704 is an aluminum alloy-based wear-resistant bushing with advantages such as good wear resistance, high strength, and good corrosion resistance, avoiding the problem of ordinary bushings peeling off in oxygen conditions and causing serious fires. Meanwhile, when the valve ball 701 rotates, the pressure ring 711 applies pressure to the pressure ring 710, which acts on the valve seat 708. The preload of the valve seat 708 is provided by the pressure ring 711, which is actually a helical spring, thus providing a constant thrust to the valve seat 708, thereby ensuring the sealing performance of the valve seat 708.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hard-seal fixed ball valve, comprising a first valve body (1) and a wear-resistant structure (7); Its features are: A second valve body (2) is installed at one end of the first valve body (1). First mounting bolts (3) are evenly installed inside the first valve body (1) and the second valve body (2). A first fixing nut (4) is installed on the outside of the first mounting bolts (3). A sealing seat (5) is installed on the top side of the first valve body (1). A sealing structure (6) is installed inside the sealing seat (5). The first valve body (1) and the second valve body (2) are equipped with a wear-resistant structure (7). The wear-resistant structure (7) includes a valve ball (701), an upper valve stem (702), a valve stem seat (703), a wear-resistant bushing (704), a bearing (705), a second sealing ring (706), a third sealing gasket (707), a valve seat (708), a graphite ring (709), a pressure ring (710), and a pressure ring (711). The valve ball (701) is installed inside the first valve body (1) and the second valve body (2). The upper valve stem (702) is installed at the top of the valve ball (701), and valve stem seats (703) are installed at both ends of the valve ball (701). A wear-resistant bushing (704) is installed on the outside of the upper valve stem (702) inside the valve stem seat (703). A bearing (705) is installed on the outside of the upper valve stem (702) inside the first valve body (1). A second sealing ring (706) is provided at the bottom end of the bearing (705). A third sealing gasket (707) is provided at both ends of the second sealing ring (706). A valve seat (708) is installed on the outside of the valve ball (701). A graphite ring (709) is provided at the top end of the valve seat (708). A pressure ring (710) is installed on the outside of the valve seat (708). A pressure ring (711) is fixed on one side of the pressure ring (710).

2. The hard-seal fixed ball valve according to claim 1, characterized in that: One end of the first mounting bolt (3) extends through one side of the second valve body (2) into the interior of the first valve body (1). The first valve body (1) and the second valve body (2) are provided with matching internal threads on the outside of the first mounting bolt (3). The first mounting bolt (3) is distributed at equal intervals inside the first valve body (1) and the second valve body (2). The first valve body (1) and the second valve body (2) are fixedly connected by the first mounting bolt (3) and the first fixing nut (4).

3. A hard-seal fixed ball valve according to claim 1, characterized in that: The sealing structure (6) includes a mounting base (601), a second mounting bolt (602), a second fixing nut (603), a rotating block (604), a stuffing box (605), a gland (606), sealing packing (607), a first sealing gasket (608), a first sealing ring (609), a second sealing gasket (610), and a fixing bolt (611). The mounting base (601) is installed on the top of the sealing seat (5). The second mounting bolts (602) are evenly installed inside the mounting base (601), and the second fixing nut (603) is installed on the outside of the second mounting bolts (602). The top of the mounting base (601) is equipped with a rotating block (604), the inside of the sealing seat (5) is provided with a stuffing box (605), the top of the stuffing box (605) is provided with a pressure cap (606), the bottom of the pressure cap (606) inside the stuffing box (605) is provided with sealing packing (607), the bottom of the stuffing box (605) is provided with a first sealing gasket (608), the bottom of the sealing seat (5) inside the first valve body (1) is provided with a first sealing ring (609) and a second sealing gasket (610), and the top of the sealing seat (5) is uniformly equipped with fixing bolts (611).

4. A hard-seal fixed ball valve according to claim 3, characterized in that: The bottom end of the second mounting bolt (602) extends through the bottom end of the sealing seat (5) into the interior of the sealing seat (5) and forms a threaded connection with the interior of the sealing seat (5). The mounting seat (601) is fixedly connected to the sealing seat (5) by the second mounting bolt (602) and the second fixing nut (603).

5. A hard-seal fixed ball valve according to claim 3, characterized in that: The sealing seat (5) is fixedly connected to the first valve body (1) by a fixing bolt (611), and the sealing seat (5) and the first valve body (1) are sealed together by a first sealing ring (609) and a second sealing gasket (610).

6. A hard-seal fixed ball valve according to claim 1, characterized in that: The outer side of the valve ball (701) is coated with a tungsten carbide coating, the wear-resistant bushing (704) is an aluminum alloy-based wear-resistant bushing, and the upper valve stem (702) is rotatably connected inside the wear-resistant bushing (704).

7. A hard-seal fixed ball valve according to claim 1, characterized in that: The upper valve stem (702) and the first valve body (1) are sealed together by the second sealing ring (706) and the third sealing gasket (707). The inner side of the pressure ring (710) abuts against the outer side of the valve seat (708). The pressure ring (711) is a helical spring.

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