Novel floating ball valve with extension bar mounted on top

Abstract

The invention belongs to the technical field of floating ball valves, and discloses a novel floating ball valve with a lengthened rod, which comprises a valve body, a ball body is arranged in the valve body, and a valve cover is fixedly and movably mounted on the left side of the valve body. The spiral-wound gasket is accurately placed between the valve cover and the valve body and fastened and connected through the bolt, preliminary sealing of the valve is ensured, the grooves designed in the valve body and the valve cover facilitate accurate installation of the valve seats, the installation stability and efficiency are improved, the two valve seats are tightly attached to the surface of the ball, reliable double sealing is formed, and the service life of the valve is prolonged. The valve rod is integrally formed, the flat portion of the lower end of the valve rod accurately penetrates into the groove of the ball body, the ball body can be easily driven to rotate through rotation, free flowing or reliable blocking of media is achieved, the whole assembling process is fine and efficient, and high performance and long-term stable operation of the valve are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of floating ball valves, in particular to a novel top-mounted extended-stem floating ball valve. Background Art

[0002] The new type of top-mounted extended stem floating ball valve consists of a valve body, a ball, an extended stem, a sealing ring and a drive device. The core of the ball is the ball, which can rotate under the drive of the valve stem to control the flow of the fluid. In the closed state, the ball hole is perpendicular to the flow channel, preventing the fluid from passing through. At this time, the sealing ring fits the ball and the valve seat tightly under the action of the medium pressure and preload force to ensure the sealing; in the open state, the ball hole is aligned with the flow channel, and the fluid can flow smoothly. The ball valve realizes effective control of the fluid through the rotation of the ball, which not only ensures the normal flow of the fluid, but also can quickly cut off the fluid when needed. The structure is simple and the function is reliable. Traditional valves often adopt a split stem design, in which the stem needs to be installed from the inside of the valve body flow channel. Under this design, the flat hole at the bottom of the drive sleeve matches the head of the stem, but due to the inevitable gap in the connection part, when the stem is subjected to unbalanced operating force, it is easy to tilt. This tilt not only causes uneven wear of the packing and increases the risk of leakage, but also due to the gap at the matching part of the stem, it may also cause the valve switch position to be inaccurate and unable to be fully in place. These problems all affect the sealing performance and operational reliability of the valve, and therefore need to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a novel top-mounted extended-stem floating ball valve to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a novel top-mounted extended-stem floating ball valve, comprising a valve body, a ball body is arranged inside the valve body, a valve cover is fixedly and movably installed on the left side of the valve body, and the valve cover and the valve body are fixedly connected by bolts, a spiral wound gasket is fixedly installed between the valve cover and the valve body, a valve seat is fixedly installed between the ball and the valve body, and the number of valve seats is set to two, a valve stem is fixedly installed inside the ball, and one end of the valve stem passes through the interior of the valve body.

[0005] Preferably, the internal thread of the valve stem is sleeved with a blowout preventer ring, and the blowout preventer ring is sequentially installed with a packing pad and a packing from top to bottom, a thrust pad is fixedly installed between the blowout preventer ring and the valve stem, a packing press sleeve is fixedly installed on the top of the packing, a bearing is fixedly installed inside the packing press sleeve, a disc spring is fixedly installed inside the packing press sleeve, and a packing pressure plate is fixedly installed on the top of the disc spring.

[0006] Preferably, a bracket is fixedly installed on the outer surface of the packing sleeve, a positioning plate is fixedly installed on the top of the bracket, and positioning screws are threadedly sleeved on the bracket and the internal part of the valve body, a handle is fixedly installed on one end of the valve stem, a retaining ring is fixedly installed between the handle and the positioning plate, and lock holes are provided inside the bracket and the positioning plate.

[0007] Preferably, the valve seat is made of polytetrafluoroethylene, and a groove is arranged inside the valve seat.

[0008] Preferably, the inner diameter of the inner groove of the sphere is equal to the outer diameter of the lower flattened portion of the valve stem, and the inner groove of the sphere has a smooth design.

[0009] Preferably, the thrust pad is in an L-shape as a whole and is located between the blowout preventer ring and the valve stem, and the thrust pad is made of polytetrafluoroethylene.

[0010] Preferably, the disc spring presents three shapes of the same size between the packing sleeve and the packing pressure plate, and the disc spring presents a conical disk shape.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. Compared with the traditional ball valve, the present invention accurately places the ball valve cover and the valve body through the spiral wound gasket and fastens them with bolts to ensure the initial sealing of the valve. The grooves designed on the valve body and the valve cover not only facilitate the accurate installation of the valve seat, but also improve the stability and efficiency of the installation. The two valve seats fit tightly against the surface of the ball to form a reliable double seal, further enhancing the sealing performance of the valve. The valve stem adopts an integrated molding design, and the flat part at the lower end accurately penetrates into the groove of the ball. The ball can be easily driven to rotate by rotation to achieve free flow or reliable blocking of the medium. The entire assembly process is precise and efficient, ensuring the high performance and long-term stable operation of the valve.

[0013] 2. Compared with the traditional ball valve, the blowout preventer ring of the present invention is tightly spun on the upper part of the valve stem shoulder and firmly screwed into the axial hole of the valve body to ensure sealing. Subsequently, a thrust pad is installed between the blowout preventer ring and the valve stem to enhance stability. Then, the packing pad, packing, packing sleeve and packing sleeve with bearing are installed in sequence from bottom to top to form a complete packing sealing system. Finally, the disc spring is installed into the packing sleeve groove and tightened with bolts through the packing pressure plate to provide dynamic load preload for the packing and ensure the reliability of the valve stem sealing function. The whole assembly process is delicate and orderly, which not only improves the sealing performance of the valve, but also enhances its structural stability and service life. The tooling boss is inserted into the inner thread of the groove on the upper part of the blowout preventer ring and screwed into the valve body and tightened to realize the anti-blowout function of the valve stem, demonstrating a high level of craftsmanship and rigorous work attitude.

[0014] 3. Compared with the traditional ball valve, the present invention realizes the complete construction of the valve operating mechanism by firmly installing the bracket on the top flange of the valve body, accurately passing the valve stem through the bracket shaft hole, assembling the positioning plate and the retaining ring, and installing the handle, ensuring the synchronous and smooth movement of the valve stem and the handle, and improving the flexibility and accuracy of the valve operation; the cooperation between the positioning screw and the 90-degree fan-shaped groove on the positioning plate enables the positioning plate to accurately perform 90-degree switching operations, thereby enhancing the accuracy of valve control; at the same time, the lock hole design on the bracket and the positioning plate facilitates locking the valve position when necessary, effectively preventing misoperation and ensuring the safety and stability of valve operation. The entire assembly process embodies a high level of craftsmanship and sophisticated design ideas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the valve structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the valve opening structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the closed position of the valve of the present invention;

[0018] Figure 4 It is a schematic diagram of the anti-blowout structure of the present invention.

[0019] In the figure: 1. valve body; 2. valve cover; 3. ball; 4. valve seat; 5. valve stem; 6. thrust pad; 7. blowout preventer ring; 8. packing pad; 9. packing; 10. packing gland; 11. bearing; 12. disc spring; 13. packing pressure plate; 14. bracket; 15. positioning plate; 16. retaining ring; 17. handle; 18. spiral wound gasket; 19. positioning screw; 20. lock hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 4As shown, an embodiment of the present invention provides a novel top-mounted extended-stem floating ball valve, comprising a valve body 1, a ball 3 is arranged inside the valve body 1, a valve cover 2 is fixedly and movably installed on the left side of the valve body 1, and the valve cover 2 and the valve body 1 are fixedly connected by bolts, a spiral wound gasket 18 is fixedly installed between the valve cover 2 and the valve body 1, a valve seat 4 is fixedly installed between the ball 3 and the valve body 1, and the number of valve seats 4 is set to two, a valve stem 5 is fixedly installed inside the ball 3, and one end of the valve stem 5 passes through the interior of the valve body 1.

[0022] When assembling the valve, the staff must first properly place the spiral wound gasket 18 between the valve cover 2 and the valve body 1, and then fasten the valve cover 2 to the valve body 1 with bolts. Grooves are designed on the valve body 1 and the valve cover 2 to facilitate the slow and accurate installation of the valve seat 4. The two valve seats 4 fit tightly against the surface of the ball 3 to form a reliable seal. Then the flat part of the lower end of the valve stem 5 passes through the valve body 1 and enters the groove of the ball 3. By rotating the valve stem 5 clockwise or counterclockwise, and the valve stem 5 adopts an integrated design, the ball 3 can be driven to rotate, thereby opening or closing the channel between the valve seats 4 to achieve free flow or reliable blocking of the medium.

[0023] When assembling the valve, first place the spiral wound gasket 18 between the valve cover 2 and the valve body 1, and fasten the two with bolts. Grooves are provided on the valve body and the valve cover to facilitate accurate installation of the valve seat 4. The two valve seats fit tightly against the surface of the ball 3 to form a seal. The flattened part at the lower end of the valve stem 5 penetrates into the groove of the ball. It adopts an integrated molding design. The ball can be driven to rotate by rotating the valve stem clockwise or counterclockwise to open or close the channel between the valve seats. Compared with the traditional ball valve, the ball valve is accurately placed between the valve cover 2 and the valve body 1 through the wound gasket 18, and is fastened with bolts to ensure the initial sealing of the valve. The grooves designed on the valve body 1 and the valve cover 2 not only facilitate the accurate installation of the valve seat, but also improve the stability and efficiency of the installation. The two valve seats 4 fit tightly against the surface of the ball to form a reliable double seal, further enhancing the sealing performance of the valve. The valve stem 5 adopts an integrated molding design, and the flattened part at the lower end accurately penetrates into the groove of the ball. The ball can be easily driven to rotate by rotation to achieve free flow or reliable blocking of the medium. The entire assembly process is precise and efficient, ensuring the high performance and long-term stable operation of the valve.

[0024] Among them, the internal thread sleeve of the valve stem 5 is connected with a blowout preventer ring 7, and the blowout preventer ring 7 is installed with a packing pad 8 and a packing 9 in sequence from top to bottom, a thrust pad 6 is fixedly installed between the blowout preventer ring 7 and the valve stem 5, a packing gland 10 is fixedly installed on the top of the packing 9, a bearing 11 is fixedly installed inside the packing gland 10, a disc spring 12 is fixedly installed inside the packing gland 10, and a packing pressure plate 13 is fixedly installed on the top of the disc spring 12.

[0025] The staff first screws the blowout preventer ring 7 with external threads tightly onto the upper shoulder of the valve stem 5, and screws it firmly into the axial hole of the valve body 1 through the threads. Then, the thrust pad 6 is carefully installed between the blowout preventer ring 7 and the valve stem 5. Subsequently, the packing pad 8, packing 9 and the packing gland 10 equipped with the bearing 11 are installed in sequence from bottom to top. Finally, the disc spring 12 is installed into the groove of the packing gland 10, and passes through the valve stem 5 through the packing pressure plate 13, and is tightly pressed with bolts to provide dynamic load preload for the packing, thereby completing the sealing function of the valve stem 5.

[0026] The blowout preventer ring 7 is spun onto the shoulder of the valve stem 5 and screwed firmly into the axial hole of the valve body 1, with the thrust pad 6 installed in between. Subsequently, the packing pad 8, packing 9 and the packing gland 10 with the bearing 11 are installed from bottom to top. Finally, the disc spring 12 is installed into the gland groove, and the packing plate 13 passes through the valve stem and is tightened with bolts to provide dynamic load preload for the packing, thus completing the sealing function of the valve stem 5. Compared with the traditional ball valve, the blowout preventer ring 7 of the ball valve is tightly spun onto the upper part of the shoulder of the valve stem 5 and screwed firmly into the axial hole of the valve body to ensure sealing. Subsequently, the thrust pad is installed between the blowout preventer ring 7 and the valve stem 5 to enhance stability. Subsequently, the valves are installed in sequence from bottom to top. The packing pad 8, packing 9, packing sleeve and packing sleeve 10 with bearing 11 form a complete packing sealing system. Finally, the disc spring 12 is installed into the groove of the packing sleeve 10 and tightened with bolts through the packing pressure plate 13 to provide dynamic load preload for the packing 9 to ensure the reliability of the sealing function of the valve stem 5. The whole assembly process is delicate and orderly, which not only improves the sealing performance of the valve, but also enhances its structural stability and service life. The tooling boss is inserted into the internal thread of the groove on the upper part of the blowout preventer 7, screwed into the valve body and tightened, realizing the anti-blowout function of the valve stem 5, demonstrating a high level of craftsmanship and rigorous work attitude.

[0027] Among them, a bracket 14 is fixedly installed on the outer surface of the packing sleeve 10, a positioning plate 15 is fixedly installed on the top of the bracket 14, and a positioning screw 19 is threadedly sleeved on the inner part of the bracket 14 and the valve body 1, a handle 17 is fixedly installed on one end of the valve stem 5, a retaining ring 16 is fixedly installed between the handle 17 and the positioning plate 15, and lock holes 20 are opened inside the bracket 14 and the positioning plate 15.

[0028] The staff uses the positioning screws 19 to firmly install the bracket 14 on the flange at the top of the valve body 1. At this time, the head of the valve stem 5 accurately passes through the axial hole of the bracket 14, and the positioning plate 15 is installed on it. At the same time, the retaining ring 16 is tightly fitted in the annular groove of the valve stem 5. Subsequently, the flat part of the handle 17 is installed on the head of the valve stem 5, and the synchronous and smooth movement of the handle and the valve stem is achieved through the tight combination of the bolts and washers. The positioning screws 19 on the upper part of the bracket 14 and the carefully designed 90-degree fan-shaped grooves on the positioning plate 15 perfectly match, so that the positioning plate can accurately perform 90-degree switching operations. In addition, the bracket 14 and the positioning plate 15 are both provided with lock holes 20, which are convenient for locking the valve position when necessary, thereby ensuring the safety and stability of the valve operation.

[0029] The bracket 14 is firmly installed on the top flange of the valve body 1 through the positioning screws 19. The head of the valve stem 5 accurately passes through the bracket shaft hole, and the positioning plate 15 is installed on the top. The retaining ring 16 is tightly fitted into the valve stem ring groove. The handle 17 is installed on the valve stem head. The bolts and washers are tightly combined to achieve synchronous and smooth movement. The positioning screws 19 on the upper part of the bracket 14 and the 90-degree fan-shaped groove on the positioning plate 15 perfectly match to ensure the precise 90-degree switching operation of the positioning plate. Both the bracket and the positioning plate are provided with locking holes 20, which are convenient for locking the valve position. Compared with the traditional ball valve, the ball valve realizes the complete construction of the valve operating mechanism by firmly installing the bracket 14 on the top flange of the valve body 1, accurately passing the valve stem 5 through the bracket shaft hole, assembling the positioning plate 15 and the retaining ring 16, and installing the handle, ensuring the synchronous and smooth movement of the valve stem 5 and the handle 17, and improving the flexibility and accuracy of the valve operation; the cooperation of the positioning screw 19 and the 90-degree fan-shaped groove on the positioning plate 15 enables the positioning plate 15 to accurately perform 90-degree switching operations, thereby enhancing the accuracy of valve control; at the same time, the design of the locking holes 20 on the bracket 14 and the positioning plate 15 is convenient for locking the valve position when necessary, effectively preventing misoperation, and ensuring the safety and stability of valve operation. The entire assembly process reflects a high level of craftsmanship and sophisticated design ideas.

[0030] The valve seat 4 is made of polytetrafluoroethylene, and a groove is arranged inside the valve seat 4 .

[0031] Since the valve seat 4 is made of polytetrafluoroethylene material and a groove is arranged inside the valve seat 4, the rubber polytetrafluoroethylene valve seat 4 has a very high corrosion resistance and can withstand the erosion of a variety of strong acids, strong alkalis and organic solvents, ensuring that the valve seat still maintains stable sealing performance in harsh media environments. At the same time, a groove is arranged inside the valve seat 4, so that the valve seat 4 and the ball 3 have a larger contact area and a tighter fit when they are fitted, thereby improving the sealing performance of the valve.

[0032] The inner diameter of the inner groove of the sphere 3 is equal to the outer diameter of the lower flattened portion of the valve stem 5 , and the inner groove of the sphere 3 has a smooth design.

[0033] Since the inner groove of the sphere 3 has a smooth design and the inner diameter of the inner groove of the sphere 3 is equal to the outer diameter of the lower flattened portion of the valve body 1 , it is convenient to insert the valve stem 5 into the sphere 3 , thereby improving the efficiency of the limiting installation of the valve stem 5 .

[0034] The thrust pad 6 is in an L-shape as a whole and is located between the blowout preventer ring 7 and the valve stem 5 . The thrust pad 6 is made of polytetrafluoroethylene.

[0035] The design of the L-shaped thrust pad 6 cleverly adapts to the space between the valve stem 5 and the blowout preventer ring 7, ensuring the compactness of the structure, effectively reducing the overall volume and weight of the valve, and thus improving the reliability and service life of the valve. Due to its extremely strong chemical corrosion resistance, polytetrafluoroethylene can resist the erosion of a variety of strong acids, strong alkalis and organic solvents. This feature enables the thrust pad 6 made of polytetrafluoroethylene to maintain stable performance in various corrosive media environments, thereby effectively extending the service life of the valve.

[0036] The disc springs 12 are three shapes of the same size between the packing sleeve 10 and the packing plate 13, and the disc springs 12 are in a conical disc shape.

[0037] Since the disc springs 12 present three shapes of the same size between the packing sleeve 10 and the packing pressure plate 13, and the disc springs 12 present a conical disc shape, the disc springs 12 can withstand extremely high loads and can provide greater elastic force than traditional springs of the same volume. This characteristic makes the connection between the packing sleeve 10 and the packing pressure plate 13 more stable and able to withstand greater pressure without deformation or damage.

[0038] Working principle and usage process:

[0039] When assembling the valve, the staff must first properly place the spiral wound gasket 18 between the valve cover 2 and the valve body 1, and then fasten the valve cover 2 to the valve body 1 with bolts. Grooves are designed on the valve body 1 and the valve cover 2 to facilitate the slow and accurate installation of the valve seat 4. The two valve seats 4 fit tightly against the surface of the ball 3 to form a reliable seal. Then the flat part of the lower end of the valve stem 5 passes through the valve body 1 and enters the groove of the ball 3. By rotating the valve stem 5 clockwise or counterclockwise, and the valve stem 5 adopts an integrated design, the ball 3 can be driven to rotate, thereby opening or closing the channel between the valve seats 4 to achieve free flow or reliable blocking of the medium.

[0040] The staff first screws the blowout preventer ring 7 with external threads tightly onto the upper shoulder of the valve stem 5, and screws it firmly into the axial hole of the valve body 1 through the threads. Then, the thrust pad 6 is carefully installed between the blowout preventer ring 7 and the valve stem 5. Subsequently, the packing pad 8, packing 9 and the packing gland 10 equipped with the bearing 11 are installed in sequence from bottom to top. Finally, the disc spring 12 is installed into the groove of the packing gland 10, and passes through the valve stem 5 through the packing pressure plate 13, and is tightly pressed with bolts to provide dynamic load preload for the packing, thereby completing the sealing function of the valve stem 5.

[0041] The staff uses the positioning screws 19 to firmly install the bracket 14 on the flange at the top of the valve body 1. At this time, the head of the valve stem 5 accurately passes through the axial hole of the bracket 14, and the positioning plate 15 is installed on it. At the same time, the retaining ring 16 is tightly fitted in the annular groove of the valve stem 5. Subsequently, the flat part of the handle 17 is installed on the head of the valve stem 5, and the synchronous and smooth movement of the handle and the valve stem is achieved through the tight combination of the bolts and washers. The positioning screws 19 on the upper part of the bracket 14 and the carefully designed 90-degree fan-shaped grooves on the positioning plate 15 perfectly match, so that the positioning plate can accurately perform 90-degree switching operations. In addition, the bracket 14 and the positioning plate 15 are both provided with lock holes 20, which are convenient for locking the valve position when necessary, thereby ensuring the safety and stability of the valve operation.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel top-mounted extended stem floating ball valve, comprising a valve body (1), characterized in that: A ball (3) is arranged inside the valve body (1); a valve cover (2) is fixedly and movably installed on the left side of the valve body (1); the valve cover (2) and the valve body (1) are fixedly connected by bolts; a spiral wound gasket (18) is fixedly installed between the valve cover (2) and the valve body (1); a valve seat (4) is fixedly installed between the ball (3) and the valve body (1), and the number of valve seats (4) is set to two; a valve stem (5) is fixedly installed inside the ball (3), and one end of the valve stem (5) passes through the interior of the valve body (1).

2. According to claim 1, the novel top-mounted extended stem floating ball valve is characterized in that: The valve stem (5) is internally threaded with a blowout prevention ring (7), and the blowout prevention ring (7) is sequentially installed with a packing pad (8) and a packing (9) from top to bottom; a thrust pad (6) is fixedly installed between the blowout prevention ring (7) and the valve stem (5); a packing pressing sleeve (10) is fixedly installed on the top of the packing (9); a bearing (11) is fixedly installed inside the packing pressing sleeve (10); a disc spring (12) is fixedly installed inside the packing pressing sleeve (10); and a packing pressing plate (13) is fixedly installed on the top of the disc spring (12).

3. According to claim 2, the novel top-mounted extended stem floating ball valve is characterized in that: A bracket (14) is fixedly mounted on the outer surface of the packing gland (10), a positioning plate (15) is fixedly mounted on the top of the bracket (14), and positioning screws (19) are threadedly sleeved inside the bracket (14) and the valve body (1), a handle (17) is fixedly mounted on one end of the valve stem (5), a retaining ring (16) is fixedly mounted between the handle (17) and the positioning plate (15), and locking holes (20) are provided inside the bracket (14) and the positioning plate (15).

4. According to claim 1, the novel top-mounted extended stem floating ball valve is characterized in that: The valve seat (4) is made of polytetrafluoroethylene, and a groove is provided inside the valve seat (4).

5. According to claim 1, the novel top-mounted extended stem floating ball valve is characterized in that: The inner diameter of the inner groove of the sphere (3) is equal to the outer diameter of the lower flattened portion of the valve stem (5), and the inner groove of the sphere (3) has a smooth design.

6. The novel top-mounted extended stem floating ball valve according to claim 2 is characterized in that: The thrust pad (6) is in an L-shape as a whole and is located between the anti-blowout ring (7) and the valve stem (5), and the thrust pad (6) is made of polytetrafluoroethylene.

7. The novel top-mounted extended stem floating ball valve according to claim 2 is characterized in that: The disc spring (12) presents three shapes of the same size between the packing pressing sleeve (10) and the packing pressing plate (13), and the disc spring (12) presents a conical disc shape.

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