Bidirectional flow hard sealing ball valve

Abstract

The utility model provides a bidirectional flow hard sealing ball valve. The two-way flow hard sealing ball valve comprises a valve body, a connecting base is fixedly installed at the top of the valve body, a spherical valve element is installed in the valve body, a through hole is formed in the spherical valve element, two sealing rings are installed in the valve body, an upper valve rod is fixedly installed at the top of the spherical valve element, the top end of the upper valve rod extends out of the connecting base, and the top end of the upper valve rod extends out of the connecting base. A connecting rod is arranged above the upper valve rod, a handle is fixedly installed on the top of the connecting rod, the connecting rod is sleeved with a pressing plate, two threaded holes are formed in the connecting seat, two hexagon socket screws are installed on the pressing plate, and the two hexagon socket screws are in threaded connection with the two threaded holes respectively. According to the bidirectional flow hard sealing ball valve, the valve rod and the spherical valve element are eccentrically arranged, so that the spherical valve element can be tightly attached to the sealing ring after the valve is closed, and the situation that the sealing performance is reduced due to friction is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of hard-sealed ball valves, in particular to a two-way flow hard-sealed ball valve. Background Art

[0002] The ball valve has a metal-to-metal material pairing for the sealing pair (i.e. the valve seat sealing surface and the ball sealing surface). The ball valve has two structural forms: floating ball type and fixed ball type, and the connection forms are flange connection, welding connection and threaded connection.

[0003] The closure of the valve body is shaped like a circle, and the closure of the valve body is shaped like a circle, and the closure of the valve body is shaped like a circle.

[0004] However, the above structure still has some shortcomings. When the ball valve is in use, the sealing ring on the floating ring will still rub against the valve body during the opening and closing of the ball valve, and the sealing performance will be reduced due to wear after long-term use.

[0005] Therefore, it is necessary to provide a new two-way flow hard seal ball valve to solve the above technical problems. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a two-way flow hard sealing ball valve which can make the spherical valve core close to the sealing ring after closing the valve by eccentrically arranging the valve stem and the spherical valve core to avoid friction that reduces the sealing performance.

[0007] In order to solve the above technical problems, the utility model provides a two-way flow hard-sealed ball valve comprising: a valve body, a connecting seat is fixedly installed on the top of the valve body, a spherical valve core is installed in the valve body, a through hole is provided on the spherical valve core, two sealing rings are installed in the valve body, an upper valve stem is fixedly installed on the top of the spherical valve core, the top end of the upper valve stem extends out of the connecting seat, a connecting rod is provided above the upper valve stem, a handle is fixedly installed on the top of the connecting rod, a pressing plate is sleeved on the connecting rod, two threaded holes are provided on the connecting seat, two hexagon socket bolts are installed on the pressing plate, and the two hexagon socket bolts are threadedly connected with the two threaded holes respectively;

[0008] A lower valve stem is fixedly mounted at the bottom of the spherical valve core, the bottom end of the lower valve stem is rotatably connected to the valve body, the upper valve stem and the lower valve stem are concentrically arranged, and the upper valve stem and the spherical valve core are eccentrically arranged.

[0009] As a further solution of the utility model, a rectangular groove is provided on the top of the upper valve stem, a rectangular plug is fixedly installed on the bottom end of the connecting rod, and the rectangular groove and the rectangular plug are matched.

[0010] As a further solution of the utility model, a sealed bearing is installed on the upper valve stem.

[0011] As a further solution of the utility model, a pressure ring is provided on the fixing sleeve of the connecting rod, and the top of the pressure ring is in contact with the pressure plate.

[0012] As a further solution of the utility model, sealing grooves are provided on the two sealing rings, and the sealing grooves are adapted to the spherical valve core.

[0013] Compared with the related art, the bidirectional flow hard seal ball valve provided by the utility model has the following beneficial effects:

[0014] The utility model arranges the valve stem and the spherical valve core eccentrically, so that when the valve is closed, the spherical valve core can be rotated and offset to be close to the sealing ring, and friction between the spherical valve core and the valve body can be avoided, which would reduce the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 A three-dimensional structural diagram of a bidirectional flow hard-sealed ball valve provided by the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the ball valve opening and closing in the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the partial structure of the bidirectional flow hard seal ball valve provided by the utility model.

[0019] In the figure: 1. valve body; 2. connecting seat; 3. spherical valve core; 4. through hole; 5. sealing ring; 6. upper valve stem; 7. connecting rod; 8. handle; 9. pressure plate; 10. threaded hole; 11. hexagon socket bolt; 12. rectangular groove; 13. rectangular plug; 14. lower valve stem; 15. sealing bearing; 16. pressure ring. DETAILED DESCRIPTION

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A three-dimensional structural diagram of a bidirectional flow hard-sealed ball valve provided by the utility model; Figure 2 This is a schematic diagram of the structure of the ball valve opening and closing in the utility model; Figure 3 A schematic diagram of the partial structure of a two-way flow hard-sealed ball valve provided by the utility model. The two-way flow hard-sealed ball valve comprises: a valve body 1, a connecting seat 2 is fixedly installed on the top of the valve body 1, a spherical valve core 3 is installed in the valve body 1, a through hole 4 is provided on the spherical valve core 3, two sealing rings 5 ​​are installed in the valve body 1, an upper valve stem 6 is fixedly installed on the top of the spherical valve core 3, the top end of the upper valve stem 6 extends to the outside of the connecting seat 2, a connecting rod 7 is provided above the upper valve stem 6, a handle 8 is fixedly installed on the top of the connecting rod 7, a pressing plate 9 is sleeved on the connecting rod 7, two threaded holes 10 are provided on the connecting seat 2, two hexagon socket head bolts 11 are installed on the pressing plate 9, and the two hexagon socket head bolts 11 are threadedly connected to the two threaded holes 10 respectively;

[0021] like Figure 2 As shown, a lower valve stem 14 is fixedly installed at the bottom of the spherical valve core 3, and the bottom end of the lower valve stem 14 is rotatably connected to the valve body 1. The upper valve stem 6 and the lower valve stem 14 are concentrically arranged, and the upper valve stem 6 and the spherical valve core 3 are eccentrically arranged.

[0022] By setting the lower valve stem 14, the stability of the spherical valve core 3 during rotation can be improved. By setting the upper valve stem 6 and the lower valve stem 14 concentrically and the upper valve stem 6 and the spherical valve core 3 eccentrically, after the upper valve stem 6 drives the spherical valve core 3 to rotate, the spherical valve core 3 can be offset and tightly attached to the sealing ring 5, thereby improving the sealing performance.

[0023] like Figure 3 As shown, a rectangular groove 12 is formed on the top of the upper valve stem 6, and a rectangular plug 13 is fixedly installed on the bottom end of the connecting rod 7, and the rectangular groove 12 and the rectangular plug 13 are adapted to each other;

[0024] By providing the rectangular groove 12 and the rectangular plug block 13 , the upper valve stem 6 and the connecting rod 7 can be connected, so that the upper valve stem 6 can be driven to rotate by the connecting rod 7 .

[0025] like Figure 2 As shown, a sealed bearing 15 is installed on the upper valve stem 6;

[0026] By providing the sealing bearing 15 , the sealing performance of the connection between the upper valve stem 6 and the connection seat 2 can be improved, thereby preventing the medium in the valve body 1 from leaking.

[0027] like Figure 3 As shown, a pressure ring 16 is fixedly sleeved on the connecting rod 7, and the top of the pressure ring 16 is in contact with the pressure plate 9;

[0028] By providing the pressing ring 16 , the connecting rod 7 can be pressed down in cooperation with the pressing plate 9 , so that the rectangular plug block 13 is inserted into the rectangular groove 12 , and the connecting rod 7 is connected to the upper valve stem 6 .

[0029] like Figure 2 As shown, the two sealing rings 5 ​​are provided with sealing grooves, and the sealing grooves are adapted to the spherical valve core 3;

[0030] By providing the sealing groove, the spherical valve core 3 and the sealing ring 5 can be in close contact with each other after the spherical valve core 3 rotates and deviates.

[0031] The working principle of the bidirectional flow hard seal ball valve provided by the utility model is as follows:

[0032] Insert the rectangular plug 13 into the rectangular groove 12, then pass the hexagon socket bolt 11 through the pressure plate 9, and then tighten the hexagon socket bolt 11, so as to move the pressure ring 16 downward through the pressure plate 9, so that the rectangular plug 13 is tightly connected with the rectangular groove 12, and the assembly of the ball valve is completed. When in use, the valve body 1 is installed on the pipeline. When opening the valve, the connecting rod 7 is driven to rotate by the handle 8, and the connecting rod 7 drives the upper valve stem 6 and the spherical valve core 3 to rotate, so that the spherical valve core 3 is located in the middle of the valve body 1. At this time, the medium can pass through the through hole 4. When closing the valve, due to the eccentric setting of the upper valve stem 6 and the spherical valve core 3, the spherical valve core 3 rotates and then deviates laterally, moves toward the sealing ring 5, and is in close contact with the sealing ring 5, and the spherical valve core 3 and the valve body 1 will not rub, resulting in reduced sealing performance.

[0033] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0034] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0035] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A two-way flow hard seal ball valve, characterized in that: include: A valve body, a connecting seat is fixedly installed on the top of the valve body, a spherical valve core is installed in the valve body, a through hole is provided on the spherical valve core, two sealing rings are installed in the valve body, an upper valve stem is fixedly installed on the top of the spherical valve core, the top end of the upper valve stem extends out of the connecting seat, a connecting rod is provided above the upper valve stem, a handle is fixedly installed on the top of the connecting rod, a pressing plate is sleeved on the connecting rod, two threaded holes are provided on the connecting seat, two hexagon socket bolts are installed on the pressing plate, and the two hexagon socket bolts are threadedly connected with the two threaded holes respectively; A lower valve stem is fixedly mounted at the bottom of the spherical valve core, the bottom end of the lower valve stem is rotatably connected to the valve body, the upper valve stem and the lower valve stem are concentrically arranged, and the upper valve stem and the spherical valve core are eccentrically arranged.

2. The two-way flow hard seal ball valve according to claim 1, characterized in that: A rectangular groove is formed on the top of the upper valve stem, and a rectangular plug-in block is fixedly mounted on the bottom end of the connecting rod, and the rectangular groove and the rectangular plug-in block are matched.

3. The two-way flow hard seal ball valve according to claim 1, characterized in that: A sealed bearing is installed on the upper valve stem.

4. The two-way flow hard seal ball valve according to claim 1, characterized in that: A pressure ring is fixedly sleeved on the connecting rod, and the top of the pressure ring contacts the pressure plate.

5. The two-way flow hard seal ball valve according to claim 1, characterized in that: The two sealing rings are both provided with sealing grooves, and the sealing grooves are matched with the spherical valve core.

Images