A side-mounted ball valve structure

Abstract

The utility model provides a kind of side-mounted ball valve structure of on-line dismounting, belong to chemical valve technical field.The purpose is to solve the problems of metal hard sealing ball valve seat complex, high temperature sealing failure, spring fatigue leakage and bearing jam failure in prior art.The utility model is equipped with threaded hole in valve body four corners, is equipped with cavity inside, is equipped with recess through-hole in top, is movably provided with ball in valve body cavity, is equipped with recess in ball top, is equipped with through-hole in center;Ball left side is connected with bonnet by downstream valve seat, right side is connected with valve body by upstream valve seat;Two bonnets are connected with valve body by four studs, and fastening nut is equipped on the outside of stud;Valve stem end is engaged with ball top recess by passing through valve body, and conversion joint, pressing plate, pressing sleeve and packing are sequentially mounted on valve stem top from top to bottom, and conversion joint is "T" type.The utility model effectively solves the problems of metal hard sealing ball valve seat complex, high temperature sealing failure, spring fatigue leakage, bearing jam failure and other problems in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of chemical valve technology, and in particular relates to a side-mounted ball valve structure that can be disassembled online. Background Technology

[0002] In industrial fluid transport and control systems, conventional fixed metal hard-seal ball valves are widely used in high-temperature, high-pressure, and high-wear conditions in petrochemical, metallurgical, and power industries due to their compact structure, strong flow capacity, and wide applicable pressure range.

[0003] However, existing conventional fixed metal hard-seal ball valves still have many technical defects that urgently need to be solved in practical applications, which seriously restrict the operational reliability and service life of the valves:

[0004] 1. The valve seat structure design is complex:

[0005] The valve seats of conventional products mostly adopt a multi-component nested structure, including multiple parts such as metal seat rings, elastic pre-tightening components, and sealing compensation components. This not only increases the difficulty of processing and assembly and production costs, but also reduces the overall structural stability of the valve seat due to the existence of fit clearance between components. Under fluctuating operating loads, problems such as component displacement and deformation are prone to occur.

[0006] 2. Insufficient sealing performance at the inlet end under high-temperature conditions:

[0007] For inlet sealing, conventional solutions typically use graphite rings as auxiliary sealing elements. However, graphite materials have limitations in high-temperature resistance. Under long-term erosion by high-temperature media and the stress of thermal expansion, graphite rings are prone to aging, cracking, and plastic deformation, leading to a decrease in the sealing surface fit and subsequent media leakage. This fails to meet the sealing reliability requirements under high-temperature conditions.

[0008] 3. The spring preload structure is prone to failure, leading to seal leakage:

[0009] The preload of the valve seat seal is mainly provided by the built-in spring. Under long-term action of high temperature and alternating loads, the spring is prone to fatigue relaxation or permanent deformation, and its preload compensation capacity is gradually lost. When the spring fails, the sealing pressure between the valve seat and the ball cannot be maintained at the design threshold, and the medium will leak along the gap of the sealing surface, eventually causing the valve seal to fail and causing safety hazards.

[0010] 4. Bearings are susceptible to particulate media intrusion, which can lead to valve malfunction.

[0011] In conventional stationary ball valves operating with media containing solid particulate impurities, particles can easily intrude into the gap between the bearing raceway and the rolling elements. This intrusion accelerates bearing wear and causes jamming, leading to a significant increase in valve torque during opening and closing. In severe cases, the valve may fail to open or close properly, affecting the system's control efficiency and operational safety.

[0012] In summary, there is an urgent need to design a side-mounted ball valve structure that can be disassembled and reassembled online to solve the problems of complex valve seats, high-temperature sealing failure, spring fatigue leakage, and bearing jamming failure in existing metal hard-seal ball valves. Utility Model Content

[0013] A brief overview of the present invention is given below to provide a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the present invention. It is not intended to identify key or essential parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0014] In view of this, in order to solve the problems of complex valve seats, high-temperature sealing failure, spring fatigue leakage and bearing jamming failure in existing metal hard-seal ball valves, this utility model provides a side-mounted ball valve structure that can be disassembled online.

[0015] A side-mounted ball valve structure that can be disassembled and reassembled online includes a valve body, valve cover, ball, valve stem, downstream valve seat, upstream valve seat, stud, packing, pressure sleeve, pressure plate, and conversion joint;

[0016] The valve body has threaded holes at its four corners, an internal cavity, and a grooved through hole at the top. A ball is movably disposed inside the valve body cavity, with a groove at the top and a through hole at the center.

[0017] The left side of the ball is connected to the valve cover via the downstream valve seat, and the right side is connected to the valve body via the upstream valve seat.

[0018] The two valve covers are connected to the valve body by four studs, and fastening nuts are provided on the outside of the studs;

[0019] The valve stem end passes through the valve body and fits into the groove on the top of the ball. From top to bottom, the top of the valve stem is equipped with a conversion joint, a pressure plate, a pressure sleeve, and packing. The conversion joint is "T" shaped.

[0020] Furthermore, a valve seat disc spring is provided between the upstream valve seat and the valve body.

[0021] Furthermore, a thrust pad is mounted on the valve stem shoulder.

[0022] Furthermore, a first toothed gasket and a second toothed gasket are respectively provided between the downstream valve seat and the valve body, and between the upstream valve seat and the valve cover.

[0023] Furthermore, a bushing is provided on the upper part of the adapter.

[0024] Furthermore, a bracket is provided between the adapter and the valve body.

[0025] The present invention has the following advantages over the prior art:

[0026] 1. This utility model adopts a floating ball structure and sets up upstream and downstream double valve seats. The downstream valve seat is used as the main sealing valve seat. With the flow direction mark on the valve body, directional isolation sealing is achieved, which effectively avoids the problems of complex sealing structure and high risk of sealing failure of conventional fixed ball valves, and improves the sealing stability of the valve in working conditions.

[0027] 2. The valve body and valve cover of this utility model are connected by bolts. The high-strength toothed gasket assembled through the positioning groove is sealed by quantitative compression of the body cover bolts. Toothed gaskets are also assembled on both sides of the step at the end of the main sealing valve seat. The double toothed sealing structure replaces the conventional graphite ring seal, which solves the problem of easy aging and failure of the sealing components under high temperature conditions and improves the valve's high temperature and high pressure sealing ability.

[0028] 3. The valve cover and valve body of this utility model adopt a planar contact design with no positioning step. When the valve core and valve seat seal fails, there is no need to cut the pipeline. Only the body cover connecting bolts need to be removed to disassemble and install the valve body, ball, seat rod and other components as a whole. This enables the rapid on-site replacement of vulnerable parts such as valve core and valve seat, avoids the construction difficulties of hot cutting required for conventional valve maintenance, and significantly improves the efficiency of on-site operation and maintenance.

[0029] 4. The valve stem of this utility model adopts a side assembly method, forming an inherent anti-blowout structure, eliminating the risk of the valve stem accidentally coming off; the upper part of the valve stem is equipped with a conversion joint and a guide bushing, which solves the problem of difficult assembly of long valve stems; the round or square packing pressure plate is equipped with four evenly distributed bolts and a disc spring loading structure, so that the packing is evenly stressed, improving the reliability and durability of the valve stem seal.

[0030] 5. This utility model adopts a bracket with a thickened steel plate welded structure, which is welded to the valve body. Compared with the conventional bracket structure, it greatly improves the load-bearing capacity and overall strength of the bracket, ensures the structural stability of the valve under harsh working conditions, and extends the service life of the valve. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of a side-mounted ball valve structure that can be disassembled and reassembled online. The arrows indicate the direction of fluid flow.

[0033] Figure 2 This is a schematic diagram of the valve body assembly.

[0034] Figure 3 for Figure 1 Enlarged view of point A;

[0035] Figure 4 for Figure 1 Enlarged view of point B.

[0036] In the diagram: 1-valve body, 2-valve cover, 3-ball, 4-valve seat disc spring, 5-valve stem, 6-downstream valve seat, 7-upstream valve seat, 8-first toothed washer, 9-second toothed washer, 10-stud, 11-thrust washer, 12-packing, 13-pressure sleeve, 14-pressure plate, 15-adapter, 16-bracket, 17-shield. Detailed Implementation

[0037] To make the technical solutions and advantages of the embodiments of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0038] Example 1, Reference Figures 1-4 This embodiment describes a side-mounted ball valve structure that can be disassembled and installed online, including a valve body 1, a valve cover 2, a ball 3, a valve stem 5, a downstream valve seat 6, an upstream valve seat 7, a stud 10, a packing 12, a pressure sleeve 13, a pressure plate 14, and a conversion connector 15.

[0039] The valve body 1 has threaded holes at its four corners, an internal cavity, and a grooved through hole at the top. A ball 3 is movably disposed inside the cavity of the valve body 1. The ball 3 has a groove at the top and a through hole at the center.

[0040] The left side of the ball 3 is connected to the valve cover 2 via the downstream valve seat 6, and the right side is connected to the valve body 1 via the upstream valve seat 7;

[0041] The two valve covers 2 are connected to the valve body 1 by four studs 10, and fastening nuts are provided on the outside of the studs 10;

[0042] The end of the valve stem 5 passes through the valve body 1 and fits into the groove at the top of the ball 3. The top of the valve stem 5 is equipped with a conversion joint 15, a pressure plate 14, a pressure sleeve 13 and a packing 12 from top to bottom. The conversion joint 15 is "T" shaped.

[0043] Furthermore, a valve seat disc spring 4 is provided between the upstream valve seat 7 and the valve body 1.

[0044] Furthermore, a thrust pad 11 is mounted on the shoulder of the valve stem 5.

[0045] Furthermore, a first toothed pad 8 and a second toothed pad 9 are respectively provided between the downstream valve seat 6 and the valve body 1, and between the upstream valve seat 7 and the valve cover 2.

[0046] Furthermore, the adapter 15 is provided with a bushing 17 on its upper part.

[0047] Furthermore, a bracket 16 is provided between the adapter 15 and the valve body 1. The bracket 16 is a thickened steel plate assembly and is welded to the valve body 1 to improve the overall strength.

[0048] The assembly method of this utility model is as follows:

[0049] Axial direction of valve stem 5: Install thrust pad 11 onto the shoulder of valve stem 5. Valve stem 5 passes through valve stem hole from the left side cavity of valve body 1. Sequentially install packing 12, pressure sleeve 13, bushing 17 and conversion joint 15 into the stuffing box of valve stem 5 at the upper part of valve body 1.

[0050] Axial direction of flow channel: The upstream valve seat disc spring 4, the upstream valve seat 7, the ball 3, and the downstream valve seat 6 are sequentially installed in the middle cavity of valve body 1 to complete the assembly of the entire valve body 1 assembly.

[0051] The left and right end faces of the valve body 1 contact the protruding end faces of the valve cover 2. The first toothed pad 8 and the second toothed pad 9 are quantitatively compressed by the stud 10 of the valve cover 2. After the valve is welded to the pipeline, the valve body 1 assembly can be disassembled from the pipeline by unscrewing the fixing nuts of the stud 10 connecting the valve body 1 and the valve cover 2, so as to easily and quickly replace the damaged internal parts of the valve.

[0052] This invention employs a floating ball structure with upstream and downstream dual valve seats, using the downstream valve seat as the main sealing seat. Combined with the flow direction indicator on the valve body, it achieves directional isolation sealing, effectively avoiding the problems of complex sealing structures and high risk of seal failure inherent in conventional fixed ball valves. This improves the valve's sealing stability under operating conditions. Simultaneously, the valve body and valve cover are bolted together, and a high-strength toothed gasket mounted through a positioning groove achieves sealing through quantitative compression by the body-cover bolts. Toothed gaskets are also mounted on both sides of the step at the end of the main sealing valve seat. This double-toothed sealing structure replaces the conventional graphite ring seal, solving the problem of easy aging and failure of seals under high-temperature conditions and improving the valve's high-temperature and high-pressure sealing capabilities.

[0053] This utility model features a flat contact design between the valve cover and valve body, with no positioning steps. When the valve core or seat seal fails, there is no need to cut the pipeline; simply removing the body cover connecting bolts allows for the complete disassembly and assembly of the valve body, ball, and seat rod. This enables rapid on-site replacement of vulnerable parts such as the valve core and seat, avoiding the construction difficulties of hot work required for conventional valve maintenance and significantly improving on-site operation and maintenance efficiency. Simultaneously, the valve stem adopts a side-mounted assembly method, forming an inherent anti-blowout structure to eliminate the risk of accidental valve stem detachment. A conversion joint and guide bushing are installed on the upper part of the valve stem, solving the problem of difficult assembly of long valve stems. A circular or square packing pressure plate, combined with four evenly distributed bolts and a disc spring loading structure, ensures uniform packing force, improving the reliability and durability of the valve stem seal.

[0054] Although the present invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the present invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and edibility purposes, and not for interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of the invention, the disclosure made is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A side-mounted ball valve structure that can be disassembled and reassembled online, characterized in that, It includes a valve body (1), a valve cover (2), a ball (3), a valve stem (5), a downstream valve seat (6), an upstream valve seat (7), a stud (10), a packing (12), a pressure sleeve (13), a pressure plate (14), and a conversion joint (15). The valve body (1) has threaded holes at its four corners, a cavity inside, and a grooved through hole at the top. A ball (3) is movably arranged inside the cavity of the valve body (1). The ball (3) has a groove at the top and a through hole at the center. The ball (3) is connected to the valve cover (2) on the left side through the downstream valve seat (6), and to the valve body (1) on the right side through the upstream valve seat (7); The two valve covers (2) are connected to the valve body (1) by four studs (10), and fastening nuts are provided on the outside of the studs (10); The valve stem (5) ends through the valve body (1) and fits into the groove at the top of the ball (3). The valve stem (5) is equipped with a conversion joint (15), a pressure plate (14), a pressure sleeve (13) and a packing (12) from top to bottom. The conversion joint (15) is "T" shaped.

2. The side-mounted ball valve structure that can be disassembled online according to claim 1, characterized in that, A valve seat disc spring (4) is provided between the upstream valve seat (7) and the valve body (1).

3. The side-mounted ball valve structure that can be disassembled online according to claim 1, characterized in that, A thrust pad (11) is mounted on the shoulder of the valve stem (5).

4. The side-mounted ball valve structure that can be disassembled online according to claim 1, characterized in that, The downstream valve seat (6) and valve body (1), and the upstream valve seat (7) and valve cover (2) are respectively provided with a first toothed pad (8) and a second toothed pad (9).

5. The side-mounted ball valve structure that can be disassembled online according to claim 1, characterized in that, The adapter (15) is provided with a bushing (17) on its upper part.

6. The side-mounted ball valve structure that can be disassembled online according to claim 5, characterized in that, A bracket (16) is provided between the adapter (15) and the valve body (1).

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