Hard sealing ball valve with lengthened valve rod and high platform

Abstract

The utility model provides a lengthened valve rod high platform hard sealing ball valve which comprises a valve body, a heightening support and a valve rod, a packing groove is formed in the side wall of a rod hole, a first containing groove is formed in the top of the valve body, a limiting ring is arranged at the bottom of the heightening support, a first hard sealing ring is arranged in the first containing groove, and a second hard sealing ring is arranged at the bottom of the packing groove. The outer ring of the second hard sealing ring abuts against the side wall of the packing groove, and the inner ring of the second hard sealing ring abuts against the valve rod. Through cooperation of the first hard sealing ring, the first containing groove and the limiting ring, the heightening support is sealed, the first hard sealing ring can provide a better limiting function, the heightening support is limited, the situation that the heightening support is low in price in the installation process is avoided, and the centrality of the heightening support is improved. And on the basis of ensuring the centrality of the heightened bracket, the valve rod is limited through the design of the hard sealing ring II, so that the valve rod has better centrality, and various related parameters of the valve are improved.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a high-platform hard-sealed ball valve with an extended valve stem. Background Art

[0002] In valves, in order to set up more comprehensive protection measures or prevent valve stem leakage, the valve stem will be lengthened. However, after the valve stem is lengthened, the center degree of the valve stem will be reduced, thereby affecting the relevant effective parameters of the valve. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a hard-sealed ball valve with an elongated valve stem and a high platform, comprising a valve body, a heightened bracket and a valve stem, the heightened bracket being fixed on the valve body, a rod hole being arranged in the heightened bracket, the valve stem being inserted into the rod hole and the valve body, a stuffing groove being arranged on the side wall of the rod hole, a receiving groove 1 being arranged on the top of the valve body, a limiting ring being arranged at the bottom of the heightened bracket, the outer diameter of the limiting ring being the same as the inner diameter of the receiving groove 1, a hard sealing ring 1 being arranged in the receiving groove 1, after installation is completed, the outer wall of the hard sealing ring 1 abuts against the receiving groove 1, the inner wall abuts against the limiting ring, a hard sealing ring 2 is arranged at the bottom of the stuffing groove, the outer ring of the hard sealing ring 2 abuts against the side wall of the stuffing groove, and the inner ring of the hard sealing ring 2 abuts against the valve stem.

[0004] Preferably, the valve stem is provided with a first section, a second section, a third section and a connecting head from top to bottom, the diameters of the first section, the second section and the third section increase successively, a widened groove is provided at the position of the rod hole below the stuffing groove, a hard sealing ring three is sleeved on the bottom of the first section, the hard sealing ring three and the second section are arranged in the widened groove, the outer wall of the hard sealing ring three abuts against the side wall of the widened groove, and the inner wall abuts against the first section.

[0005] Preferably, it also includes a gland, bolts and nuts. A limiting groove is opened on the top of the heightening bracket, and the gland is arranged in the limiting groove. Connecting holes are opened on the gland and the limiting groove. The bolts pass through the connecting holes and are connected to the nuts to fix the gland and the heightening bracket.

[0006] Preferably, a second receiving groove for receiving the bolt head is provided on the gland.

[0007] Preferably, the bolt is an external hexagonal bolt, and the shape of the second receiving groove is hexagonal to match the bolt.

[0008] Preferably, the first hard sealing ring, the second hard sealing ring and the third hard sealing ring all include a metal layer and graphite layers arranged at the upper and lower ends of the metal layer.

[0009] The beneficial effects of the utility model are as follows: through the cooperation of the hard sealing ring 1, the receiving groove 1 and the limiting ring, the heightened bracket is sealed and the hard sealing ring 1 can provide a better limiting function, limit the heightened bracket, avoid the heightened bracket being cheap during the installation process, and improve the center of the heightened bracket. On the basis of ensuring the center of the heightened bracket, through the design of the hard sealing ring 2, the valve stem is limited, so that the valve stem has a better center, thereby improving various relevant parameters of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the overall structure diagram of the utility model;

[0011] Figure 2 This is a structural diagram of the heightening bracket;

[0012] Figure 3 It is a structural diagram of hard sealing ring one, hard sealing ring two and hard sealing ring three. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0014] See also Figure 1-Figure 3 The utility model provides a long valve stem high platform hard seal ball valve, comprising a valve body 1, a heightened bracket 2 and a valve stem 3, the heightened bracket 2 is fixed on the valve body 1, a rod hole is arranged in the heightened bracket 2, the valve stem 3 is penetrated in the rod hole and the valve body 1, a packing groove 4 is arranged on the side wall of the rod hole, a receiving groove 5 is arranged on the top of the valve body 1, a limiting ring 6 is arranged at the bottom of the heightened bracket 2, the outer diameter of the limiting ring 6 is the same as the inner diameter of the receiving groove 5, a hard sealing ring 7 is arranged in the receiving groove 5, after installation, the outer wall of the hard sealing ring 7 abuts against the receiving groove 5, and the inner wall abuts against the limit ring 6, a hard sealing ring 2 8 is arranged at the bottom of the packing groove 4, the outer ring of the hard sealing ring 2 8 abuts against the side wall of the packing groove 4, and the inner ring of the hard sealing ring 2 8 abuts against the valve stem 3.

[0015] The hard seal ring 17 cooperates with the receiving groove 15 and the limiting ring 6 to seal the heightened bracket 2 and provide a better limiting function to limit the heightened bracket 2, thereby preventing the heightened bracket 2 from being too low during installation and improving the center of the heightened bracket 2. On the basis of ensuring the center of the heightened bracket 2, the hard seal ring 28 is designed to limit the valve stem 3, so that the valve stem 3 has a better center, thereby improving various relevant parameters of the valve.

[0016] Furthermore, the valve stem 3 is provided with a first section 31, a second section 32, a third section 33 and a connecting head 34 from top to bottom, the diameters of the first section 31, the second section 32 and the third section 33 increase successively, a widened groove 9 is provided at the position of the rod hole below the stuffing groove 4, a hard sealing ring 3 10 is sleeved on the bottom of the first section 31, the hard sealing ring 3 10 and the second section 32 are arranged in the widened groove 9, the outer wall of the hard sealing ring 3 10 abuts against the side wall of the widened groove 9, and the inner wall abuts against the first section 31.

[0017] Through the direct difference between the first section 31 and the second section 32, the hard sealing ring 3 10 is limitedly installed, and then the valve stem 3 is further limited by the hard sealing ring 3 10, so as to further improve the centering degree of the valve stem 3.

[0018] Furthermore, it also includes a pressure cover 11, bolts 12 and nuts 13. A limiting groove 21 is opened on the top of the heightening bracket 2. The pressure cover 11 is arranged in the limiting groove 21. Connecting holes are opened on the pressure cover 11 and the limiting groove 21. The bolts 12 pass through the connecting holes and are connected with the nuts 13 to fix the pressure cover 11 and the heightening bracket 2.

[0019] Through the design of the limiting groove 21, the gland 11 can be hidden in the limiting groove 21, so that the gland 11 itself has a better positioning, and then the valve stem 3 is limited by the gland 11 to improve the center degree of the valve stem 3; after the gland 11 is hidden in the limiting groove 21, the top of the heightened bracket 2 presents a larger plane, which is convenient for installing equipment.

[0020] Furthermore, the gland 11 is provided with a second receiving groove 14 for receiving the bolt head.

[0021] After the bolt head is hidden in the second receiving groove 14, the top of the heightening bracket 2 is made flat, which is convenient for installing equipment.

[0022] Furthermore, the bolt 12 is an external hexagonal bolt 12 , and the shape of the second receiving groove 14 is adapted to the bolt 12 and is hexagonal.

[0023] After the bolt head is matched with the second receiving groove 14 , the depression at the top of the heightened bracket 2 is reduced, so that the top of the heightened bracket 2 provides stronger support.

[0024] Furthermore, the hard sealing ring 1 7, the hard sealing ring 2 8 and the hard sealing ring 3 10 all include a metal layer and graphite layers arranged at the upper and lower ends of the metal layer, so as to ensure their limiting support performance while giving them sealing performance.

[0025] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A long valve stem high platform hard seal ball valve, comprising a valve body (1), a heightened bracket (2) and a valve stem (3), wherein the heightened bracket (2) is fixed to the valve body (1), a rod hole is provided in the heightened bracket (2), the valve stem (3) is inserted into the rod hole and the valve body (1), and a packing groove (4) is provided on the side wall of the rod hole, characterized in that: The top of the valve body (1) is provided with a receiving groove (5), the bottom of the heightened bracket (2) is provided with a limiting ring (6), the outer diameter of the limiting ring (6) is the same as the inner diameter of the receiving groove (5), and a hard sealing ring (7) is provided in the receiving groove (5). After installation, the outer wall of the hard sealing ring (7) abuts against the receiving groove (5), and the inner wall abuts against the limiting ring (6). The bottom of the stuffing groove (4) is provided with a hard sealing ring (8), the outer ring of the hard sealing ring (8) abuts against the side wall of the stuffing groove (4), and the inner ring of the hard sealing ring (8) abuts against the valve stem (3).

2. The long stem high platform hard seal ball valve according to claim 1, characterized in that: The valve stem (3) is provided with a first section (31), a second section (32), a third section (33) and a connector (34) in sequence from top to bottom. The diameters of the first section (31), the second section (32) and the third section (33) are increased in sequence. A widening groove (9) is provided at a position of the stem hole below the stuffing groove (4). A hard sealing ring (3) (10) is sleeved on the bottom of the first section (31). The hard sealing ring (3) (10) and the second section (32) are arranged in the widening groove (9). The outer wall of the hard sealing ring (3) abuts against the side wall of the widening groove (9), and the inner wall abuts against the first section (31).

3. The long stem high platform hard seal ball valve according to claim 1, characterized in that: It also includes a gland (11), a bolt (12) and a nut (13); a limit groove (21) is provided on the top of the heightening bracket (2); the gland (11) is arranged in the limit groove (21); both the gland (11) and the limit groove (21) are provided with connecting holes; the bolt (12) passes through the connecting hole and is connected to the nut (13) to fix the gland (11) and the heightening bracket (2).

4. The long stem high platform hard seal ball valve according to claim 3, characterized in that: The gland (11) is provided with a second receiving groove (14) for receiving the head of the bolt (12).

5. The long stem high platform hard seal ball valve according to claim 4, characterized in that: The bolt (12) is an external hexagonal bolt (12), and the shape of the second receiving groove (14) is adapted to the bolt (12) to be a hexagon.

6. The long stem high platform hard seal ball valve according to claim 1, characterized in that: The hard sealing ring 1 (7), the hard sealing ring 2 (8) and the hard sealing ring 3 (10) all include a metal layer and graphite layers arranged at the upper and lower ends of the metal layer.

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