Modularized small-caliber three-piece type die forging floating ball valve

Abstract

The utility model discloses a modularized small-caliber three-piece type die forging floating ball valve which comprises a die forging valve body, two die forging valve covers, a ball body and a valve rod, and the die forging valve body and the die forging valve covers are connected through bolts and nuts; the ball body is connected with one end of the valve rod, and the other end of the valve rod is connected with the handle. By means of the mode, the multi-directional die forging technology is used for replacing a casting technology or a traditional free forging technology, casting defects can be avoided, energy consumption is reduced, the material utilization rate is improved, labor productivity is improved, and meanwhile the problems that part of complex forgings cannot be produced through free forging and blanks of the complex forgings are difficult to manufacture can be solved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a modular small-diameter three-piece die-forged floating ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (valve body) is driven by the valve stem and rotates around the ball valve axis. It is used for fluid regulation and control. With the rapid development of science and technology and the continuous improvement of production processes and product structures, ball valves have become a major type of valve, characterized by good wear resistance, superior sealing performance, easy opening and closing, and long service life. They are widely used in industries such as petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, power, municipal engineering, and steel. Currently, ball valves used in industry are classified according to the ball mounting method into top-mounted, bottom-mounted, side-mounted, and angled-mounted types. Regardless of the ball mounting method, ball valve structures typically only have two types: fixed ball valves and floating ball valves. In a floating ball valve, the ball is freely supported on the valve seat. Under fluid pressure, the ball displaces in the direction of fluid flow, thereby achieving tight contact between the valve seat sealing surface and the ball, forming a single-sided seal. The ball in a fixed ball valve has upper and lower rotating shafts, which are fixed in the bearings of the ball. The ball is in a fixed position, while the valve seat is floating. The valve seat makes tight contact with the ball under the action of spring force and medium force to achieve a seal.

[0003] Conventional ball valve forging technology typically suffers from the following problems due to casting processes: manufacturing floating ball valves involves high energy consumption and low material utilization. Existing technologies using casting or traditional free forging processes suffer from casting defects, significant material loss, and high costs; moreover, free forging cannot produce some complex forgings, and the preparation of complex forging blanks is difficult. Furthermore, existing technologies limit the applicable sizes of floating ball valves, making them unsuitable for small-diameter valve ports. Utility Model Content

[0004] To solve the aforementioned technical problems, this utility model replaces casting or traditional free forging with multi-directional die forging, which avoids casting defects, reduces energy consumption, and improves material utilization. It also solves the problems of free forging being unable to produce some complex forgings and the difficulty in preparing billets for complex forgings. Furthermore, to better meet market demands, the inventors have developed a modular small-diameter three-piece die-forged floating ball valve with a diameter ranging from 0.5" to 1.5" and a pressure rating of 800LB.

[0005] Therefore, the present invention provides the following technical solution:

[0006] A modular small-diameter three-piece die-forged floating ball valve includes: a die-forged valve body, upper and lower die-forged valve covers, a ball, and a valve stem. The die-forged valve body and the die-forged valve covers are connected by bolts and nuts.

[0007] The ball is connected to one end of the valve stem, and the other end of the valve stem is connected to the handle.

[0008] Preferably, the ball has a crescent groove, the valve stem is located in the crescent groove, and the ball and the valve stem are sealed and locked together by a nut.

[0009] Preferably, a thrust washer is provided between the second nut and the valve stem.

[0010] Preferably, a spiral wound gasket is provided between the connection between the forged valve body and the forged valve cover, and the spiral wound gasket is a metal-wound graphite gasket.

[0011] Preferably, a limiting plate, a pressure sleeve, and packing are further provided between the second nut and the valve stem;

[0012] The limiting plate, pressure sleeve, and packing are fitted onto the valve stem.

[0013] Preferably, a disc spring is also provided below the limiting plate, and the disc spring is pressed against the pressure sleeve.

[0014] The floating ball valve also includes a valve seat, which is located at both ends of the forged valve body, and one end of the valve seat abuts against the ball to form a sealing pair;

[0015] The end of the valve seat away from the ball is connected to the forged valve cover.

[0016] Preferably, an antistatic spring and an antistatic ball are provided between the ball and the valve stem.

[0017] Preferably, a positioning plate is provided below the handle.

[0018] The beneficial effects of this utility model are:

[0019] (1) The present invention discloses a modular small-diameter three-piece die-forged floating ball valve, which replaces the casting process or the traditional free forging process with multi-directional die forging process. The valve body and valve cover adopt a die-forged structure, which can avoid casting defects, reduce energy consumption, improve material utilization, and reduce costs.

[0020] (2) The present invention discloses a modular small-diameter three-piece die-forged floating ball valve, which has good sealing performance and can meet the needs of valves with diameters from 0.5" to 1.5", thus meeting the market demand for small-diameter floating ball valves. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a modular small-diameter three-piece die-forged floating ball valve according to this utility model;

[0022] The components in the attached diagram are labeled as follows:

[0023] 1. Forged valve body; 2. Forged valve cover; 3. Ball; 4. Valve stem; 5. Valve seat; 6. Thrust washer; 7. O-ring; 8. Bolt; 9. Nut 1; 10. Packing; 11. Pressure sleeve; 12. Limiting plate; 13. Nut 2; 14. Positioning plate; 15. Positioning pin; 16. Handle; 17. Nut 3; 18. Antistatic spring; 19. Antistatic ball; 20. Spiral wound gasket; 21. Disc spring. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0025] Example:

[0026] This implementation describes the structure of a modular small-diameter three-piece die-forged floating ball valve.

[0027] Combined with appendix Figure 1 As shown, a modular small-diameter three-piece die-forged floating ball valve includes: a die-forged valve body 1, two upper and lower die-forged valve covers 2, a ball 3, and a valve stem 4. The die-forged valve body 1 and the die-forged valve covers 2 are connected by bolts 8 and nuts 9.

[0028] The ball 3 is connected to one end of the valve stem 4 and is sealed and locked onto the valve stem 4 by a nut 13 passing through the forged valve body 1; the other end of the valve stem 4 is connected to the handle 16 by a nut 17.

[0029] In this embodiment, the ball valve consists of a single forged valve body and two separate forged valve covers, resulting in a simple shape and ease of forging. The forged valve body and covers avoid casting defects, ensuring high metallurgical quality and easy machining. The outer contour requires no machining, and the forged shape is aesthetically pleasing. The design is simple, low-cost, has a short production cycle, and produces high-quality products. The forged valve body and covers are connected by bolts and nuts, making the product easy to install, disassemble, and interchange.

[0030] Furthermore, a thrust washer 6 is provided between the nut 13 and the valve stem 4 to prevent the nut from loosening and axial movement. By working in conjunction with the nut, it ensures that the nut will not rotate or loosen on its own when subjected to vibration or impact, and can also withstand a certain axial load. When axial force acts on the thrust washer, it transmits the force to the relevant components, maintaining the stability and reliability of the mechanical device and improving the reliability of the threaded connection.

[0031] In this embodiment, an O-ring 7 is also provided between the nut 13 and the valve stem 4. The O-ring not only provides a reliable sealing effect, but also improves the reliability and stability of the connection.

[0032] Furthermore, a spiral wound gasket 20 is provided between the connection between the forged valve body 1 and the forged valve cover 2. The spiral wound gasket 20 is a metal-wound graphite gasket, which has good sealing performance and fireproof function.

[0033] Furthermore, a limiting plate 12, a pressure sleeve 11, and a packing 10 are also provided between the nut 13 and the valve stem 4;

[0034] The limiting plate 12, the pressure sleeve 11, and the packing 10 are sleeved on the valve stem 4.

[0035] In this embodiment, the valve stem is designed to be larger at the bottom and smaller at the top. With the valve stem positioned by the forged valve body, it can be ensured that the valve stem will not fly out even when the valve cavity is pressurized.

[0036] Furthermore, a disc spring 21 is provided below the limiting plate 12, and the disc spring 21 is pressed against the pressure sleeve 11.

[0037] The valve stem seal is locked by nut 13, and the disc spring 21 provides continuous preload compensation to the packing 10, which is suitable for temperature changes and ensures the sealing performance at the valve stem.

[0038] A positioning plate 14 is provided below the handle 16, and a positioning pin 15 passes through the positioning plate 14. The opening and closing stroke of the handle is limited by the limiting plate 12 and the positioning pin 15. Rotating the handle drives the valve to rotate, thereby controlling the rotation of the ball and controlling the opening and closing of the valve.

[0039] The floating ball valve also includes a valve seat 5, which is located at both ends of the forged valve body 1, and one end of the valve seat 5 abuts against the ball 3 to form a sealing pair; the end of the valve seat 5 away from the ball 3 is connected to the forged valve cover 2.

[0040] In this embodiment, the valve seat 5 is made of PTFE material. PTFE is known as the "king of plastics" and is a high-performance polymer material with excellent chemical stability, high temperature resistance, and a low coefficient of friction. This improves the sealing performance of the ball valve.

[0041] In this embodiment, a crescent groove is formed on the ball 3, and the valve stem 4 is located within the crescent groove. The ball 3 and the valve stem 4 are sealed and locked together by a nut 13. The crescent groove design increases the load capacity of the ball valve and ensures that even if deformation occurs at the ball opening under high pressure, the ball can still be pressed against the outlet valve seat to achieve a seal, meeting the required sealing level and improving the valve's excellent sealing performance.

[0042] Furthermore, an antistatic spring 18 and an antistatic ball 19 are provided between the ball 3 and the valve stem 4 to prevent static electricity from igniting flammable substances and ensure safe use.

[0043] This modular, small-diameter, three-piece forged floating ball valve has the following features:

[0044] 1) Lower material costs;

[0045] 2) The materials and performance are reliable and meet the requirements of the working conditions;

[0046] 3) It has fireproof and antistatic functions;

[0047] 4) The valve features a soft-seal design, ensuring zero leakage.

[0048] Since the working principle of the floating ball valve is known to those skilled in the art and belongs to the prior art, the inventor will not elaborate on it.

[0049] This utility model relates to a modular small-diameter three-piece die-forged floating ball valve, which was independently developed by the inventors and our company based on a long period of experience in the design, production, assembly, and inspection of a large number of ball valves. It can meet the needs of valves with a small diameter of 0.5" to 1.5", and fills the technical demand for small-diameter floating ball valves in the market. The design and development of this ball valve is of great significance to the market and our company.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A modular small-diameter three-piece die-forged floating ball valve, characterized in that, include: The forged valve body (1), two forged valve covers (2), a ball (3), and a valve stem (4) are connected by bolts (8) and nuts (9). The ball (3) is connected to one end of the valve stem (4), and the other end of the valve stem (4) is connected to the handle (16).

2. The modular small-diameter three-piece die-forged floating ball valve according to claim 1, characterized in that: The ball (3) has a crescent groove, the valve stem (4) is located in the crescent groove, and the ball (3) and the valve stem (4) are sealed and locked by the nut (13).

3. A modular small-diameter three-piece die-forged floating ball valve according to claim 2, characterized in that: A thrust washer (6) is provided between the second nut (13) and the valve stem (4).

4. A modular small-diameter three-piece die-forged floating ball valve according to claim 1, characterized in that: A spiral wound gasket (20) is provided between the connection between the forged valve body (1) and the forged valve cover (2), and the spiral wound gasket (20) is a metal spiral wound graphite gasket.

5. A modular small-diameter three-piece die-forged floating ball valve according to claim 2, characterized in that: A limit plate (12), a pressure sleeve (11), and a packing (10) are also provided between the nut (13) and the valve stem (4); The limiting plate (12), the pressure sleeve (11), and the packing (10) are fitted onto the valve stem (4).

6. A modular small-diameter three-piece die-forged floating ball valve according to claim 5, characterized in that: A disc spring (21) is also provided below the limiting plate (12), and the disc spring (21) is pressed against the pressure sleeve (11).

7. A modular small-diameter three-piece die-forged floating ball valve according to claim 1, characterized in that: It also includes a valve seat (5), which is located at both ends of the forged valve body (1), and one end of the valve seat (5) abuts against the ball (3) to form a sealing pair; The valve seat (5) is connected to the forged valve cover (2) at the end away from the ball (3).

8. A modular small-diameter three-piece die-forged floating ball valve according to claim 1, characterized in that: An antistatic spring (18) and an antistatic ball (19) are provided between the ball (3) and the valve stem (4).

9. A modular small-diameter three-piece die-forged floating ball valve according to claim 1, characterized in that: A positioning piece (14) is provided below the handle (16).

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