Double-valve-seat ball valve with sealing structure

Abstract

The utility model provides a double-valve-seat ball valve with a sealing structure. The double-valve-seat ball valve with the sealing structure comprises a main valve body, auxiliary valve bodies are installed on the two sides of the main valve body, a valve element is arranged in the main valve body, an annular groove is formed in one side of each auxiliary valve body, a positioning ring and a push ring are installed in the annular grooves in a sliding mode, a plurality of telescopic springs are fixedly installed between the positioning rings and the push rings, and the telescopic springs are connected with the valve element in a sliding mode. A valve seat is fixedly installed on one side of the push ring, one end of the valve seat extends into the main valve body and makes contact with the valve element, two rectangular grooves and two screw holes are formed in the auxiliary valve body, trapezoidal push blocks are installed in the rectangular grooves in a sliding mode, and set screws are installed in the screw holes in a threaded mode. The double-valve-seat ball valve with the sealing structure has the advantages that the valve seats can be tightly attached to the valve element all the time, the sealing capacity is guaranteed, the positioning ring can be pushed after the valve seats are abraded, and it is guaranteed that the elastic force of the spring is sufficient.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve technology, and in particular relates to a double-seat ball valve with a sealing structure. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves not only allow for flexible control of media merging, splitting, and flow direction switching in pipelines, but also allow the closure of any channel while connecting two other channels.

[0003] In related technologies, a double-seat ball valve is disclosed, including a valve body and a valve cover. The valve cover is located above the valve body and is connected to the valve body by bolts. A ball petal is provided at the center of the valve body, and a bushing is provided below the ball petal inside the valve body. A supporting ball is provided above the bushing. A ball groove is opened at the center of the bottom of the ball petal, and the supporting ball is embedded in the ball groove. A valve stem is provided through the center of the valve cover, and the top of the valve stem extends to the outside of the valve cover and is connected to a wheel. The bottom of the valve stem passes through a limiting plate and is connected to the ball petal. This utility model is applicable to valves. In this valve, the bottom support structure of the ball petal uses a supporting ball that engages with the ball groove. This spherical fit structure has good fit, and the center position of the ball will not change no matter how it swings. The spherical fit is a toroidal contact with a large contact surface, which is not easy to wear. The spherical fit has no dead corners and does not produce phenomena such as liquid accumulation and coking.

[0004] However, there are still shortcomings in the above structure. After long-term use, the friction between the valve seat and the valve core will cause wear on the valve seat, resulting in displacement of the seal and affecting the service life.

[0005] Therefore, it is necessary to provide a new double-seat ball valve with a sealing structure to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a double-seat ball valve with a sealing structure that allows the valve seat to always be tightly attached to the valve core to ensure sealing capability, and allows the positioning ring to be pushed after the valve seat wears out to ensure sufficient spring force.

[0007] To solve the above-mentioned technical problems, the present invention provides a double-seat ball valve with a sealing structure, comprising: a main valve body, with auxiliary valve bodies installed on both sides of the main valve body; a valve core disposed within the main valve body; an annular groove formed on one side of the auxiliary valve body; a positioning ring and a push ring slidably mounted within the annular groove; multiple telescopic springs fixedly mounted between the positioning ring and the push ring; a valve seat fixedly mounted on one side of the push ring; one end of the valve seat extending into the main valve body and contacting the valve core; two rectangular slots and two threaded holes formed on the auxiliary valve body; a trapezoidal push block slidably mounted within the rectangular slots; and a set screw threaded into the threaded holes, with the bottom end of the set screw contacting the trapezoidal push block.

[0008] As a further embodiment of this utility model, a lower valve stem is fixedly installed at the bottom of the valve core, and the lower valve stem is rotatably connected to the main valve body. An upper valve stem is fixedly installed at the top of the valve core, and the top end of the upper valve stem extends to the body of the main valve body and is rotatably connected to the main valve body. A valve cover is installed at the top of the main valve body, and a drive rod is rotatably installed on the valve cover. A handwheel is fixedly installed at the top end of the drive rod.

[0009] As a further embodiment of this utility model, a sealing groove is provided on the secondary valve body, and a sealing ring is fixedly installed on the main valve body, with one side of the sealing ring extending into the sealing groove and fitting into the sealing groove.

[0010] As a further embodiment of this utility model, a rectangular block is fixedly installed at the top of the upper valve stem, and a connecting groove is provided at the bottom of the drive rod. The top of the rectangular block extends into the connecting groove and is adapted to the connecting groove.

[0011] As a further embodiment of this utility model, both the outer and inner rings of the push ring are fixedly equipped with sealing rings, and both sealing rings are in contact with the inner wall of the annular groove.

[0012] As a further embodiment of this utility model, one side of the positioning ring is provided with an inclined surface, and the bottom of the trapezoidal push block is in contact with the inclined surface.

[0013] Compared with related technologies, the double-seat ball valve with a sealing structure provided by this utility model has the following advantages:

[0014] In this invention, the elastic force of the telescopic spring can keep the valve seat tightly against the valve core, ensuring the sealing capability of the ball valve. When the valve seat wears down and the elastic force of the telescopic spring can no longer keep the valve seat tightly against the valve core, the trapezoidal push block pushes the positioning ring to increase the elastic force of the telescopic spring, ensuring that the sealing capability is not affected by the wear of the valve seat and improving the service life. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 A schematic diagram of the overall structure of the double-seat ball valve with a sealing structure provided by this utility model;

[0017] Figure 2 A cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model;

[0018] Figure 3 A first partial cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model;

[0019] Figure 4 A second partial cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model;

[0020] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.

[0021] In the diagram: 1. Main valve body; 2. Secondary valve body; 3. Valve core; 4. Annular groove; 5. Positioning ring; 6. Push ring; 7. Telescopic spring; 8. Valve seat; 9. Rectangular groove; 10. Screw hole; 11. Trapezoidal push block; 12. Set screw; 13. Lower valve stem; 14. Upper valve stem; 15. Valve cover; 16. Drive rod; 17. Handwheel; 18. Sealing groove; 19. Sealing ring; 20. Rectangular block; 21. Connecting groove. Detailed Implementation

[0022] Please refer to the following: Figures 1 to 5 ,in, Figure 1 A schematic diagram of the overall structure of the double-seat ball valve with a sealing structure provided by this utility model; Figure 2 A cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model; Figure 3 A first partial cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model; Figure 4 A second partial cross-sectional view of the double-seat ball valve with a sealing structure provided by this utility model; Figure 5 for Figure 4A magnified structural diagram of part A. The double-seat ball valve with a sealing structure includes: a main valve body 1, with auxiliary valve bodies 2 installed on both sides of the main valve body 1; a valve core 3 is disposed inside the main valve body 1; an annular groove 4 is formed on one side of the auxiliary valve body 2; a positioning ring 5 and a push ring 6 are slidably installed in the annular groove 4; multiple telescopic springs 7 are fixedly installed between the positioning ring 5 and the push ring 6; a valve seat 8 is fixedly installed on one side of the push ring 6; one end of the valve seat 8 extends into the main valve body 1 and contacts the valve core 3; two rectangular slots 9 and two screw holes 10 are formed on the auxiliary valve body 2; a trapezoidal push block 11 is slidably installed in the rectangular slots 9; a set screw 12 is threaded into the screw hole 10; and the bottom end of the set screw 12 contacts the trapezoidal push block 11.

[0023] like Figure 3 As shown, a lower valve stem 13 is fixedly installed at the bottom of the valve core 3, and the lower valve stem 13 is rotatably connected to the main valve body 1. An upper valve stem 14 is fixedly installed at the top of the valve core 3, and the top end of the upper valve stem 14 extends to the outside of the main valve body 1 and is rotatably connected to the main valve body 1. A valve cover 15 is installed at the top of the main valve body 1, and a drive rod 16 is rotatably installed on the valve cover 15. A handwheel 17 is fixedly installed at the top end of the drive rod 16.

[0024] By configuring the lower valve stem 13, upper valve stem 14, valve cover 15, drive rod 16, and handwheel 17, the opening and closing of the ball valve can be controlled by rotating the handwheel 17.

[0025] like Figures 2 to 4 As shown, a sealing groove 18 is provided on the secondary valve body 2, and a sealing ring 19 is fixedly installed on the main valve body 1. One side of the sealing ring 19 extends into the sealing groove 18 and is adapted to the sealing groove 18.

[0026] By setting the sealing groove 18 and the sealing ring 19, the sealing performance at the connection between the main valve body 1 and the secondary valve body 2 can be improved after the secondary valve body 2 is installed on the main valve body 1.

[0027] like Figure 3 As shown, a rectangular block 20 is fixedly installed at the top of the upper valve stem 14, and a connecting groove 21 is provided at the bottom of the drive rod 16. The top of the rectangular block 20 extends into the connecting groove 21 and is adapted to the connecting groove 21.

[0028] By setting the rectangular block 20 and the connecting groove 21, it is easy to connect the upper valve stem 14 and the drive rod 16, so that the upper valve stem 14 can be rotated by rotating the drive rod 16.

[0029] like Figure 5 As shown, both the outer and inner rings of the push ring 6 are fixedly fitted with sealing rings, and both sealing rings are in contact with the inner wall of the annular groove 4.

[0030] By setting a sealing ring, the sealing performance of the push ring 6 when sliding in the annular groove 4 can be improved, preventing liquid from contacting the spring and causing the spring to be affected by the liquid.

[0031] like Figure 5 As shown, one side of the positioning ring 5 is provided with an inclined surface, and the bottom of the trapezoidal push block 11 is in contact with the inclined surface;

[0032] By setting an inclined surface, it can cooperate with the trapezoidal push block 11, and push the positioning ring 5 after the trapezoidal push block 11 descends.

[0033] The working principle of the double-seat ball valve with sealing structure provided by this utility model is as follows:

[0034] The auxiliary valve body 2 is installed on one side of the main valve body 1. At this time, the valve seat 8 extends into the main valve body 1, and the telescopic spring 7 is compressed, so that the valve seat 8 is tightly attached to the valve core 3, thereby ensuring the sealing of the ball valve. The drive rod 16 is rotated by the handwheel 17. The drive rod 16 drives the upper valve rod 14 to rotate through the connecting groove 21 and the rectangular block 20. The upper valve rod 14 drives the valve core 3 to rotate, thereby controlling the opening and closing of the ball valve. After long-term use, when the valve seat 8 wears down and the elasticity of the telescopic spring 7 is no longer able to keep the valve seat 8 tightly attached to the valve core 3, the set screw 12 is rotated. The set screw 12 moves down and drives the trapezoidal push block 11 to move down. The trapezoidal push block 11 pushes the positioning ring 5, thereby increasing the compression range of the telescopic spring 7 and increasing the elasticity of the telescopic spring 7, so that the valve seat 8 is tightly attached to the valve core 3 again, ensuring the sealing.

[0035] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0036] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, 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 appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A double-seat ball valve with a sealing structure, characterized in that, include: The main valve body has auxiliary valve bodies installed on both sides. A valve core is installed inside the main valve body. An annular groove is opened on one side of the auxiliary valve body. A positioning ring and a push ring are slidably installed in the annular groove. Multiple telescopic springs are fixedly installed between the positioning ring and the push ring. A valve seat is fixedly installed on one side of the push ring. One end of the valve seat extends into the main valve body and contacts the valve core. Two rectangular slots and two screw holes are opened on the auxiliary valve body. A trapezoidal push block is slidably installed in the rectangular slot. A set screw is threaded in the screw hole. The bottom end of the set screw contacts the trapezoidal push block.

2. The double-seat ball valve with a sealing structure according to claim 1, characterized in that: A lower valve stem is fixedly installed at the bottom of the valve core and is rotatably connected to the main valve body. An upper valve stem is fixedly installed at the top of the valve core and extends to the outside of the main valve body and is rotatably connected to the main valve body. A valve cover is installed at the top of the main valve body and a drive rod is rotatably installed on the valve cover. A handwheel is fixedly installed at the top of the drive rod.

3. The double-seat ball valve with a sealing structure according to claim 1, characterized in that: The secondary valve body has a sealing groove, and the main valve body has a sealing ring fixedly installed thereon. One side of the sealing ring extends into the sealing groove and is adapted to the sealing groove.

4. The double-seat ball valve with a sealing structure according to claim 2, characterized in that: A rectangular block is fixedly installed at the top of the upper valve stem, and a connecting groove is provided at the bottom of the drive rod. The top of the rectangular block extends into the connecting groove and is adapted to the connecting groove.

5. The double-seat ball valve with a sealing structure according to claim 1, characterized in that: Both the outer and inner rings of the push ring are fixedly fitted with sealing rings, and both sealing rings are in contact with the inner wall of the annular groove.

6. The double-seat ball valve with a sealing structure according to claim 1, characterized in that: One side of the positioning ring is provided with an inclined surface, and the bottom of the trapezoidal push block is in contact with the inclined surface.

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