High temperature resistant two-piece ball valve

Abstract

The utility model discloses a kind of high-temperature-resistant two-piece ball valve, including valve body, valve ball is arranged in valve body, two sides of valve ball each install one metal valve seat, the inside of valve body is all set with hardening treatment groove, disc spring is arranged in hardening treatment groove, disc spring and metal valve seat are pressed contact, the top of valve ball is connected with valve stem, valve stem is set with valve stem seal, packing, press sleeve, handle sleeve, press sleeve is fixedly connected with valve body.The utility model adopts disc spring to realize auxiliary sealing, can realize the contact area of valve seat and valve body is larger, better uniformity, smaller space is occupied simultaneously;Valve body and disc spring contact part is treated by hardening, to reduce the friction of valve body surface in compression, anti-loose process of disc spring.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a high-temperature resistant two-piece ball valve. Background Technology

[0002] Ball valves, as a commonly used shut-off valve, are widely used in industrial pipelines due to their advantages such as rapid opening and closing, low flow resistance, and good sealing performance. Among them, metal-seated ball valves, because their seats are made of metal materials (such as stainless steel, hard alloys, etc.), have the characteristics of high temperature resistance, wear resistance, and corrosion resistance, making them particularly suitable for high temperature and high pressure conditions.

[0003] The sealing structure of traditional metal seat ball valves has the following technical defects: the seal between the metal seat and the ball depends on the pre-tightening force during assembly. However, during long-term use, the pre-tightening force is easily weakened by factors such as media erosion, temperature fluctuations (thermal expansion and contraction leading to metal deformation), and pressure changes, resulting in an increase in the gap between the sealing surfaces and causing media leakage.

[0004] To address the aforementioned issues, existing technologies have attempted to use springs (such as cylindrical helical springs) for auxiliary sealing. However, cylindrical helical springs suffer from drawbacks such as large axial space requirements, poor uniformity of elastic force, and insufficient high-temperature resistance (prone to fatigue failure under long-term high temperatures), making them unsuitable for the compact internal structure and demanding operating conditions of metal-seat ball valves. Therefore, there is an urgent need for an auxiliary sealing solution that can balance sealing compensation, structural compactness, and operating condition resistance. Utility Model Content

[0005] To solve the above problems, this utility model provides a high-temperature resistant two-piece ball valve.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a high-temperature resistant two-piece ball valve, including a valve body, a valve ball is provided in the valve body, a metal valve seat is installed on each side of the valve ball, a hardened groove is opened on the inner side of the valve body, a disc spring is provided in the hardened groove, the disc spring is pressed and contacted with the metal valve seat, a valve stem is connected to the top of the valve ball, and a valve stem seal, packing, pressure sleeve and handle sleeve are provided on the valve stem, the pressure sleeve is fixedly connected to the valve body.

[0007] Furthermore, the valve stem seal is mounted on the shoulder of the valve stem and contacts the valve body.

[0008] Furthermore, the packing and pressure sleeve are installed from bottom to top in the neck of the valve body.

[0009] Furthermore, the handle sleeve is mounted on top of the valve stem.

[0010] Furthermore, the pressure sleeve is fixedly connected to the valve body by bolts and nuts.

[0011] This invention uses a disc spring to achieve auxiliary sealing, which can achieve a larger and more uniform contact area with the valve seat and valve body, while occupying less space; the contact area between the valve body and the disc spring is hardened to reduce the friction of the disc spring on the valve body surface during compression and anti-loosening. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0013] The components include: 1. Valve ball; 2. Valve stem; 3. Valve stem seal; 4. Disc spring; 5. Metal valve seat; 6. Valve body; 7. Packing; 8. Pressure sleeve; 9. Handle sleeve; 10. Bolts and nuts. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1 , 2 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] A high-temperature resistant two-piece ball valve includes a valve body 6, within which a valve ball 1 is housed. A metal valve seat 5 is mounted on each side of the valve ball 1. Hardened grooves are formed on the inner side of the valve body 6, and disc springs 4 are installed within these grooves, pressing against the metal valve seats 5. A valve stem 2 is connected to the top of the valve ball 1. The valve stem 2 is equipped with a valve stem seal 3, packing 7, a pressure sleeve 8, and a handle sleeve 9. The pressure sleeve 8 is fixedly connected to the valve body 6. The valve stem seal 3 is mounted on the shoulder of the valve stem 2, contacting the valve body 6. The packing 7 and pressure sleeve 8 are installed from bottom to top on the neck of the valve body 6. The handle sleeve 9 is mounted on the top of the valve stem 2. The pressure sleeve 8 is fixedly connected to the valve body 6 by bolts and nuts 10.

[0016] During valve assembly, the metal valve seats 5 on both sides move towards both sides of the flow channel while clamping the valve ball 1, which compresses the disc spring 4 to achieve pre-tightening and ensure reliable assembly. When the valve is closed and performs a sealing function, the load that was originally borne solely by the metal valve seat 5 is evenly distributed to the disc spring 4 on the back of the metal valve seat 5, reducing fatigue wear on the contact sealing surface of the metal valve seat 5 due to long-term use, thereby reducing the overall pre-tightening force of the valve and extending the service life of the valve.

[0017] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model. Although this utility model has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of this utility model. In particular, as long as there is no technical conflict, the features in the embodiments disclosed in this utility model can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-temperature resistant two-piece ball valve, characterized in that, The valve body includes a valve ball, with a metal valve seat installed on each side of the valve ball. The inner side of the valve body has a hardened groove, and a disc spring is installed in the hardened groove. The disc spring is pressed against the metal valve seat. The top of the valve ball is connected to a valve stem, which is equipped with a valve stem seal, packing, pressure sleeve, and handle sleeve. The pressure sleeve is fixedly connected to the valve body.

2. The high-temperature resistant two-piece ball valve according to claim 1, characterized in that, The valve stem seal is installed on the shoulder of the valve stem and contacts the valve body.

3. The high-temperature resistant two-piece ball valve according to claim 1, characterized in that, The packing and pressure sleeve are installed from bottom to top in the neck of the valve body.

4. The high-temperature resistant two-piece ball valve according to claim 1, characterized in that, The handle sleeve is mounted on the top of the valve stem.

5. The high-temperature resistant two-piece ball valve according to claim 1, characterized in that, The pressure sleeve is fixedly connected to the valve body by bolts and nuts.

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