High-pressure large-diameter top-mounted ball valve

Abstract

The high-pressure large-diameter top-mounted ball valve comprises a valve body, an inner base, a ball body, a valve cover, a valve shaft, a valve seat and a spring seat, the valve body is provided with an air inlet communicated with the spring seat, the air inlet is communicated with air through a pipe joint, the contact face of the valve seat and the valve body is provided with an O-shaped ring and a graphite ring, and the spring seat is provided with a rectangular through groove for installing a chain ring assembly. The compression amount of the spring is adjusted by controlling the pressure of an air source, then disassembly and assembly of the chain ring assemblies on the two sides of the ball body are achieved, disassembly and assembly are more labor-saving and convenient, the valve has the online overhauling function, the chain ring assemblies support the spring seat, the spring is compressed to provide the pre-tightening specific pressure needed by the valve, and the sealing reliability of the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a top-mounted ball valve structure. Background Art

[0002] At present, the commonly used top-entry pipeline ball valve structure is mostly assembled by pulling the valve seat away from the ball from both sides of the channel to achieve the ball top installation, which requires the manufacture of special tooling and is relatively cumbersome to assemble.

[0003] The existing threaded valve seat top-mounted structure has defects in its assembly method because the outer circle of the nut is a single force point when the pre-tightening nut is rotated to squeeze the spring seat. Therefore, it is laborious to assemble and the spring cannot be compressed to the designed size, resulting in insufficient pre-tightening pressure ratio and leakage of the medium. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-pressure, large-caliber, top-mounted ball valve, comprising a valve body, an inner base, a ball, a valve cover, a valve shaft, a valve seat, and a spring seat. The valve body is provided with an air inlet hole connected to the spring seat, and gas is communicated through the air inlet hole through a pipe joint. An O-ring and a graphite ring are provided on the contact surface between the valve seat and the valve body, and a rectangular through groove for installing a chain ring assembly is provided on the spring seat.

[0005] Preferably, the chain ring assembly includes an annular chain block, a connecting block, and a connecting pin.

[0006] Preferably, the O-ring is a rubber O-ring installed in the first, second and fourth annular grooves of the valve seat, and the graphite ring is a fireproof graphite ring installed in the third annular groove of the valve seat.

[0007] Preferably, the upper and lower parts of the sphere are processed into upper and lower frustums, respectively, and the upper and lower frustums are respectively abutted against the valve cover and the inner base through bearings.

[0008] Preferably, the upper circular platform is provided with evenly distributed pin holes, which are connected to the valve shaft via transmission pins.

[0009] Preferably, an anti-static device is provided on the bottom plane of the valve shaft. Beneficial Effects

[0010] The compression of the spring is adjusted by controlling the air source pressure, thereby realizing the disassembly and assembly of the chain ring components on both sides of the ball. The disassembly and assembly is more labor-saving and convenient, so that the valve has the function of online maintenance. The chain ring component supports the spring seat and compresses the spring to provide the preload pressure required by the valve, thereby improving the sealing reliability of the valve.

[0011] The upper and lower parts of the ball are processed into upper and lower cones respectively, which reduces its weight and thus reduces the torque required for valve opening and closing. The upper and lower cones are respectively connected to the valve cover and the inner base through bearings, ensuring that the axis of the ball does not deviate, so that the ball can stably contact the sealing rings on both sides, ensuring the reliability of the seal. The upper cone is provided with evenly distributed pin holes, which are connected to the valve shaft through transmission pins to achieve a seamless connection between the valve shaft and the ball, eliminating the gap of the traditional square tenon and flat key connection, thereby avoiding the phenomenon of the valve opening and closing not being in place due to the existence of gaps; at the same time, it also avoids the phenomenon of valve failure caused by wear between the matching parts due to inertia force when the valve is opened and closed quickly; BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure;

[0013] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0014] Figure 3 Schematic diagram of valve seat structure;

[0015] Figure 4 It is a schematic diagram of the spring seat structure;

[0016] Figure 5 is a schematic diagram of the chain link assembly structure;

[0017] Figure 6 Schematic diagram of the sphere structure.

[0018] In the figure: 1-valve body; 2-inner base; 3-ball; 4-valve cover; 5-valve shaft; 6-spring seat; 7-spring; 8-valve seat; 9-O-ring; 10-graphite ring; 11-chain ring assembly; 12-air inlet hole; 13-pipe joint; 14-sealing ring; 15-annular chain block; 16-connecting block; 17-connecting pin; 18-upper round table; 19-pin hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-6A high-pressure, large-caliber, top-mounted ball valve includes a valve body, an inner base, a sphere, a valve cover, a valve shaft, a valve seat, and a spring seat. The valve body is provided with an air inlet hole connected to the spring seat, and the air inlet hole is connected to the gas through a pipe joint. The contact surface between the valve seat and the valve body is provided with an O-ring and a graphite ring. The O-ring is a rubber O-ring installed in the first, second, and fourth annular grooves of the valve seat. The graphite ring is a fireproof graphite ring installed in the third annular groove of the valve seat. The spring seat is provided with a rectangular through groove for installing a chain ring assembly. The chain ring assembly includes an annular chain block, a connecting block, and a connecting pin. The upper and lower parts of the sphere are respectively processed into upper and lower cones, which are respectively abutted against the valve cover and the inner base through bearings. The upper cone is provided with evenly distributed pin holes, which are connected to the valve shaft through a transmission pin. An anti-static device is provided on the bottom plane of the valve shaft.

[0021] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A high-pressure large-caliber top-entry ball valve, comprising a valve body, an inner base, a ball, a valve cover, a valve shaft, a valve seat, and a spring seat, characterized in that: The valve body is provided with an air inlet hole connected to the spring seat, and the air inlet hole communicates with gas through a pipe joint. An O-ring and a graphite ring are installed on the contact surface between the valve seat and the valve body, and the spring seat is provided with a rectangular through groove for installing a chain ring assembly.

2. A high pressure large diameter top entry ball valve according to claim 1, characterized in that The chain ring assembly includes a ring chain block, a connecting block, and a connecting pin.

3. A high pressure large diameter top entry ball valve according to claim 1, characterized in that The O-ring is a rubber O-ring installed in the first, second and fourth annular grooves of the valve seat, and the graphite ring is a fireproof graphite ring installed in the third annular groove of the valve seat.

4. A high pressure large diameter top entry ball valve according to claim 1, characterized in that The upper and lower parts of the sphere are respectively processed into upper and lower cones, and the upper and lower cones are respectively abutted against the valve cover and the inner base through bearings.

5. A high pressure large diameter top entry ball valve according to claim 4, characterized in that The upper circular platform is provided with evenly distributed pin holes, which are connected to the valve shaft through transmission pins.

6. A high pressure large diameter top entry ball valve according to claim 1, characterized in that , an anti-static device is provided on the bottom plane of the valve shaft.

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