Online maintenance type integrated broadside valve

Abstract

The invention discloses an online maintenance type integrated broadside valve, and relates to the technical field of broadside valves, the online maintenance type integrated broadside valve comprises a valve body, a straight-through valve unit with a straight-through ball body, a right-angle valve unit with a right-angle ball body and a valve rod driving the valve units to be opened and closed, the valve body is of an integrally formed structure, and a flow channel communicating the straight-through valve unit with the right-angle valve unit is formed in the valve body; a maintenance opening is formed in the side wall of the valve body, and a detachable valve deck is fixed to the maintenance opening in a sealed mode. The straight-through valve unit and the right-angle valve unit are fixed in the valve body through an independent supporting structure and are only in torque transmission connection with the valve rod, and the maintenance opening is configured to allow the straight-through valve unit and the right-angle valve unit to be integrally disassembled and assembled through the opening; on-line maintenance of the valve can be achieved, the valve body is integrally designed, no middle connecting body exists, the overall integration degree of the valve is higher, in addition, the valve is provided with the three two-way sealing valve seats, and the sealing reliability in the valve is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of side valve, in particular to an integrated side valve for online maintenance. BACKGROUND

[0002] The side valve needs to be connected with the outside of the ship in the ship sea system, and as a pressure boundary, its sealing performance is very important. In order to ensure the safety of the ship, the side valve usually needs to be provided with multiple valves to achieve multiple insurance. The commonly used scheme is to combine a straight-through ball valve and a right-angle ball valve through an intermediate connecting body, and then connect the straight-through ball valve and the right-angle ball valve with the pipeline through the interface flange.

[0003] However, when the valve has a sealing surface scratch or other problems that cause the valve to leak and need to be repaired, the entire side valve must be removed from the pipeline for repair. Since the side valve is combined by two valves and has a large volume, and the valve often has an L-shaped structure, the valve is difficult to disassemble, and the disassembly process needs to damage the adjacent pipeline support frame, which consumes a long time for repair. SUMMARY

[0004] The purpose of the present application is to provide an integrated side valve for online maintenance, so as to solve the problem that the existing side valve cannot be repaired online, thereby causing long repair time.

[0005] The technical solution of the present application to solve the above technical problems is as follows: an integrated side valve for online maintenance, comprising a valve body, a straight-through valve unit having a straight-through ball, a right-angle valve unit having a right-angle ball, and a valve stem for driving the valve unit to open and close; The valve body is an integral structure, and a flow channel communicating the straight-through valve unit and the right-angle valve unit is formed in the valve body. A maintenance opening is provided in the side wall of the valve body, and a detachable valve cover is sealingly fixed to the maintenance opening. The straight-through valve unit and the right-angle valve unit are fixed in the valve body by independent support structures, and are only connected by torque transmission between the valve stem. The maintenance opening is configured to allow the straight-through valve unit and the right-angle valve unit to be integrally disassembled through the opening.

[0006] Further, the independent support structure comprises: A fixing ring is anchored in the cavity of the valve body by a tensioning assembly; A first support plate connects the fixing ring and the valve body to constrain the axial displacement of the straight-through ball; A second support plate connects the fixing ring, the valve body and the valve cover to constrain the axial displacement of the right-angle ball.

[0007] Further, the straight-through valve unit is respectively provided with a first and a second bidirectional sealing valve seat, and the right-angle valve unit is respectively provided with a third bidirectional sealing valve seat and a flow guide sleeve for guiding the medium when the valve is fully open. The first, second and third bidirectional sealing valve seats each have a valve seat sealing ring, which can press the spherical sealing surface under the positive or negative medium pressure.

[0008] Further, the bidirectional sealing valve seat comprises a valve seat sealing ring, an O-ring skeleton, a valve seat supporting ring and a spring. During the positive sealing, the medium acts on the annular zone between the outer diameter of the O-ring skeleton and the inner diameter of the valve seat sealing surface to push the valve seat to tightly contact the sphere to form a seal. During the negative sealing, the medium acts on the annular zone between the inner diameter of the O-ring skeleton and the outer diameter of the valve seat sealing surface to push the valve seat to tightly contact the sphere to form a seal.

[0009] Further, the upper end of the valve body is provided with a flange with a neck, the valve stem is sleeved into the stuffing box and is installed as a whole in the flange hole of the flange with a neck, and the end of the flange with a neck is connected with an actuator, and the actuator is connected with the valve stem.

[0010] Further, the valve stem is matched with the straight-through sphere and the right-angle sphere through a square hole-shaft cooperation. Further, two symmetrical threaded through holes are arranged at the circumferential position of the flange neck of the right-angle end pipeline interface of the valve body, a tapered screw is arranged in the threaded through hole in a matched mode, a wedge surface groove corresponding to the threaded through hole is formed in the outer circle of the third bidirectional sealing valve seat, the end surface of the tapered screw has a tapered surface structure matched with the wedge surface groove, and the tapered surface structure of the end of the tapered screw generates a force with the wedge surface groove on the third bidirectional sealing valve seat, so that the third bidirectional sealing valve seat is pushed away to take out the right-angle sphere.

[0011] Further, a tool for disassembling the four-split ring, the fixed ring and the straight-through sphere is further included, the tool comprises a pressing ring, a pressing rod arranged on the pressing ring, a support plate arranged on the pressing ring and corresponding to the position of the pressing rod, a connecting portion bolt is penetrated through the support plate, and a connecting portion nut is matched with the connecting portion bolt.

[0012] Further, the valve cover is installed at the maintenance opening through a bolt assembly.

[0013] The application has the following beneficial effects: the online maintenance type integrated side valve provided by the application has the following advantages. (1) The valve can be maintained online without disassembling the whole valve from the pipeline. (2) The structure is reliable, the valve body adopts an integrated design without an intermediate connecting body, the integrated degree of the valve is higher, and the structure is more compact.

[0014] (3) The sphere is fixed by the upper and lower support plates, the risk of external leakage is reduced, and the convenience of disassembling the valve stem is improved.

[0015] (4) The valve is designed with three bidirectional sealing seats, which greatly improves the internal sealing reliability of the valve. The straight-through ball is designed with two matched bidirectional sealing seats, and the right-angle ball is designed with one bidirectional sealing seat. When the medium flows from two directions, three seals can be achieved, and the internal sealing reliability of the valve is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the vertical sectional view of the integrated side valve in the closed position state in the application; Figure 2 is the horizontal sectional view of the integrated side valve in the closed position state in the application; Figure 3 is the vertical sectional view of the integrated side valve in the open position state in the application; Figure 4 is the horizontal sectional view of the integrated side valve in the open position state in the application; Figure 5 is the structure schematic diagram of the bidirectional sealing seat in the application; Figure 6 is the bidirectional sealing principle diagram of the bidirectional sealing seat in the application; Figure 7 is the seat pushing open schematic diagram when the right-angle ball is disassembled in the application; Figure 8 is the tooling schematic diagram when the straight-through ball is disassembled in the application; Figures 1 to 8 The reference signs shown in the drawings represent: 1-valve body, 2-straight-through ball, 3-right-angle ball, 4-valve stem, 5-valve cover, 6-fixing ring, 7-first support plate, 8-second support plate, 9-first bidirectional sealing seat, 10-second bidirectional sealing seat, 11-third bidirectional sealing seat, 12-flow guide sleeve, 13-valve seat sealing ring, 14-O-ring skeleton, 15-valve seat support ring, 16-spring, 17-stuffing box, 18-actuator, 19-conical screw, 20-wedge surface groove, 21-tightening ring, 22-four-way ring, 23-positioning pin, 24-tensioning screw, 25-sealing gasket, 26-sealing bolt, 28-graphite ring, 30-O-ring, 31-pressing ring, 32-pressing rod, 33-support plate, 34-joint bolt, 35-joint nut. DETAILED DESCRIPTION

[0017] The principles and characteristics of the application are described below in combination with the drawings, and the examples are only used to explain the application and are not used to limit the scope of the application.

[0018] As Figures 1 to 4As shown, an online maintenance integrated side valve includes a valve body 1, a straight-through valve unit with a straight-through ball 2, a right-angle valve unit with a right-angle ball 3, and a valve rod 4 for driving the valve unit to open and close, the straight-through ball 2 controls the opening and closing of the straight-through flow channel, forming the first sealing barrier, the right-angle ball 3 controls the opening and closing of the right-angle diversion flow channel, forming the second sealing barrier, the straight-through valve unit and the right-angle valve unit are fixed in the valve body 1 through independent support structures, and are only connected with the valve rod 4 for torque transmission, eliminating the problems of sealing failure at the valve rod and increasing the torque of the valve rod caused by the eccentric load of the valve rod.

[0019] The valve body 1 is an integral structure, eliminating the intermediate connecting body and reducing the leakage points, and the inside of the valve body 1 forms a flow channel connecting the straight-through valve unit and the right-angle valve unit, and the side wall of the valve body 1 is provided with a maintenance opening to provide a maintenance channel, and the maintenance opening is sealed and fixed with a detachable valve cover 5, the valve cover 5 is installed at the maintenance opening through a bolt assembly (bolt, nut and gasket), for sealing the maintenance opening, when disassembled, the maintenance channel can be exposed, and the integrity of the valve cavity is protected, after all the parts in the valve cavity are installed, the valve cover 5 is installed through the bolt, nut and gasket, and the maintenance opening is configured to allow the straight-through valve unit and the right-angle valve unit to be disassembled as a whole through the opening.

[0020] In this embodiment, the independent support structure includes a fixing ring 6, a first support plate 7 and a second support plate 8, the fixing ring 6 is anchored in the cavity of the valve body 1 through a tensioning assembly, the first support plate 7 connects the fixing ring 6 and the valve body 1 to constrain the axial displacement of the straight-through ball 2, and the second support plate 8 connects the fixing ring 6, the valve body 1 and the valve cover 5 to constrain the axial displacement of the right-angle ball 3. The fixing ring 6 bears the axial load of the two balls, eliminates the axial load of the valve rod 4, balances the distribution of medium force, and provides a mounting reference for the support plates. The first support plate 7 serves as a straight-through ball 2 restraining mechanism, one end abuts against the fixing ring, the other end abuts against the inner wall of the valve body 1, rigidly fixes the straight-through ball 2, and bears the forward / reverse pressure impact. One end of the second support plate 8 abuts against the valve cover 5, the middle part abuts against the inside of the valve body 1, and the other end abuts against the fixing ring 6, forming a multi-surface fixation to ensure that the right-angle ball 3 has no axial displacement, and the positioning pin 23 is used for positioning the first support plate 7 and the second support plate 8.

[0021] Through the setting of the first support plate and the second support plate, the upper end of the ball is not fixed by the valve rod, and the valve rod performs a pure torque action without tilting due to bearing eccentric load (spring force and medium force), which reduces the torque of the valve rod and improves the sealing reliability of the O-ring and packing at the valve rod sealing position, thereby reducing the risk of external leakage at the valve rod sealing position. In addition, the lower end of the ball is not fixed by the lower end cover (the lower end cover needs to be installed outside the valve body), which reduces the number of potential external leakage risk points. Furthermore, the upper end of the ball is fixed by the support plate without using the valve rod, and when the valve is disassembled, the valve rod does not bear the force transmitted by the spring behind the valve seat, and the valve rod can be easily disassembled.

[0022] Specifically, the tensioning assembly includes a tensioning screw 24, a tight ring 21 and a four-opening ring 22. The four-opening ring 22 is mounted on the inner wall hole of the valve body 1, exposing the shoulder. The tight ring 21 abuts against one side shoulder of the four-opening ring 22. The tensioning screw 24 is screwed through the through hole of the tight ring 21 and is screwed with the fixed ring 6, and the fixed ring 6 is tightly abutted against the other side shoulder of the four-opening ring by tightening the tensioning screw 24, so as to realize the anchoring of the fixed ring and form a mechanical interlock with the valve body 1.

[0023] The axial constraint of the ball by the independent support structure is decoupled from the driving function of the valve stem 4, the pain point of the valve stem 4 bearing the eccentric load is solved, the innovative tensioning assembly realizes the contact anchoring of the fixed ring 6, and the positioning pin 23 is used for positioning the first support plate 7 and the second support plate 8.

[0024] As shown in Figures 5 to 6 In the embodiment, the straight-through valve unit is respectively provided with a first bidirectional sealing valve seat 9 and a second bidirectional sealing valve seat 10, and the right-angle valve unit is respectively provided with a third bidirectional sealing valve seat 11 and a flow guide sleeve 12. The flow guide sleeve 12 is used for guiding the medium when the valve is fully open, reducing the fluid resistance and eliminating the vortex noise. When the medium flows from the straight-through end to the right-angle end, the first bidirectional sealing valve seat 9 acts as an inlet sealing barrier of the straight-through valve unit and bears the first sealing under the positive pressure. The second bidirectional sealing valve seat 10 acts as an outlet sealing barrier of the straight-through valve unit and bears the secondary sealing under the reverse pressure. The third bidirectional sealing valve seat 11 acts as a sealing barrier of the right-angle valve unit and bears the third sealing under the reverse pressure. Finally, a three-stage sealing barrier linkage is formed.

[0025] The first bidirectional sealing valve seat 9, the second bidirectional sealing valve seat 10 and the third bidirectional sealing valve seat 11 all have a valve seat sealing ring 13, which can be pressed against the ball sealing surface under the positive or reverse medium pressure. Specifically, the bidirectional sealing valve seat includes the valve seat sealing ring 13, an O-ring skeleton 14, a graphite ring 28, a valve seat support ring 15 and a spring 16. When sealing in the positive direction, the medium acts on the annular area between the outer diameter of the O-ring skeleton 14 and the inner diameter of the valve seat sealing surface to push the valve seat against the ball to form a seal. When sealing in the reverse direction, the medium acts on the annular area between the inner diameter of the O-ring skeleton 14 and the outer diameter of the valve seat sealing surface to push the valve seat against the ball to form a seal.

[0026] The valve seat sealing ring 13 is in direct contact with the spherical sealing surface, forming a soft sealing interface to achieve metal-non-metal sealing. The O-ring skeleton 14 forms a pressure response chamber to fix the O-ring 30, converting the medium pressure into a sealing force. The spring 16 pre-tightens the valve seat sealing ring 13 to provide an initial sealing pressure ratio, ensuring zero-pressure sealing.

[0027] In this embodiment, a neck flange is provided at the upper end of the valve body 1. The valve stem 4 is inserted into the stuffing box 17 and then installed as a whole in the flange hole of the neck flange. The end of the neck flange is connected to the actuator 18, and the actuator 18 is connected to the valve stem 4. The valve stem 4 is matched with the straight-through sphere 2 and the right-angle sphere 3 through the square hole-axis.

[0028] like Figure 7 As shown, in this embodiment, two symmetrical threaded holes are provided circumferentially on the flange neck of the right-angle end pipe interface of the valve body 1. Tapered screws 19 are provided in the threaded holes. A wedge groove 20 corresponding to the threaded hole is provided on the outer circumference of the third two-way sealing valve seat 11. The end face of the tapered screw 19 has a tapered surface structure that matches the wedge groove 20. The tapered surface structure of the tapered screw 19 at its end generates a force with the wedge groove 20 on the third two-way sealing valve seat 11, thereby pushing open the third two-way sealing valve seat 11 to remove the right-angle sphere 3, thereby achieving the removal of the right-angle sphere and realizing online maintenance of the right-angle ball valve. After the valve ball is repaired and assembled, the tapered screw 19 is removed, the sealing gasket 25 is installed, and the sealing bolt 26 is tightened.

[0029] In this embodiment, the two valve seats adapted to the straight ball 2 are both provided with coil springs behind them. Due to the spring force, the four-open ring 22, the fixed ring 6 and the straight ball 2 need to be disassembled using a tool. This embodiment provides a tool for disassembling the four-open ring 22, the fixed ring 6 and the straight ball 2, such as Figure 8 As shown, the tooling includes a pressing ring 31, a pressing rod 32 provided on the pressing ring 31, and a support plate 33 provided on the pressing ring 31 and corresponding to the position of the pressing rod 32. A connecting bolt 34 is passed through the support plate 33, and a connecting nut 35 is fitted on the connecting bolt 34. When in use, the pressing rod 32 of the tooling 31 is first pressed against the fixing ring 6 by means of the connecting bolt 32 and the connecting nut 33. At this time, the spring force mentioned above is borne by the tooling 31, and the four-open ring 22 no longer bears the spring force. The four-open ring 22 can then be removed from the valve body 1. Then, the connecting bolt 32 and the connecting nut 33 are loosened, and the tooling 31 is removed. The fixing ring 6 can then be removed from the valve body 1. Finally, the through ball 2 can be removed from the valve body 1, thereby realizing online maintenance of the through ball valve.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online serviceable integrated side shore valve characterized by, The valve body (1) is an integral structure, and a flow channel communicating the straight-through valve unit and the right-angle valve unit is formed in the valve body (1), and a maintenance opening is arranged on the side wall of the valve body (1), and a detachable valve cover (5) is sealingly fixed to the maintenance opening; The straight-through valve unit and the right-angle valve unit are fixed in the valve body (1) through independent support structures, and are only connected with the valve rod (4) through torque transmission. The independent support structure comprises: A fixing ring (6) is anchored in a cavity of the valve body (1) through a tensioning assembly; 2. An online serviceable integrated marine valve according to claim 1, characterized in that, A first support plate (7) connects the fixing ring (6) and the valve body (1) to constrain the axial displacement of the straight-through ball (2); A second support plate (8) connects the fixing ring (6), the valve body (1) and the valve cover (5) to constrain the axial displacement of the right-angle ball (3). The straight-through valve unit is respectively provided with a first bidirectional sealing valve seat (9) and a second bidirectional sealing valve seat (10), the right-angle valve unit is respectively provided with a third bidirectional sealing valve seat (11) and a flow guide sleeve (12), and the flow guide sleeve (12) is used for guiding the medium when the valve is fully opened. The first bidirectional sealing valve seat (9), the second bidirectional sealing valve seat (10) and the third bidirectional sealing valve seat (11) all have valve seat sealing rings (13), and the valve seat sealing rings (13) can be pressed against the sealing surface of the ball under the positive or reverse medium pressure to form a seal.

3. The online serviceable integrated marine valve of claim 1, wherein, The bidirectional sealing valve seat comprises a valve seat sealing ring (13), an O-ring skeleton (14), a valve seat support ring (15) and a spring (16). When the valve is positively sealed, the medium acts on the annular area between the outer diameter of the O-ring skeleton (14) and the inner diameter of the valve seat sealing surface to push the valve seat against the ball to form a seal.

4. An online serviceable integrated marine valve according to claim 3, wherein, When the valve is reversely sealed, the medium acts on the annular area between the inner diameter of the O-ring skeleton (14) and the outer diameter of the valve seat sealing surface to push the valve seat against the ball to form a seal. The upper end of the valve body (1) is provided with a flange with a neck, the valve rod (4) is sleeved into a packing gland (17) and is installed in the flange hole of the flange with a neck as a whole, the end of the flange with a neck is connected with an actuator (18), and the actuator (18) is connected with the valve rod (4). The valve rod (4) is matched with the straight-through ball (2) and the right-angle ball (3) through a square hole-shaft cooperation.

5. The online serviceable integrated marine valve of claim 1, wherein, Two symmetrical threaded through holes are arranged at the circumferential position of the flange neck of the right-angle end pipeline interface of the valve body (1), a tapered screw (19) is matched and arranged in the threaded through hole, a wedge groove (20) corresponding to the threaded through hole is formed on the outer circle of the third bidirectional sealing valve seat (11), the end surface of the tapered screw (19) has a tapered surface structure matched with the wedge groove (20), the tapered screw (19) generates a force through the tapered surface structure at the end and the wedge groove (20) on the third bidirectional sealing valve seat (11), and then pushes away the third bidirectional sealing valve seat (11) to take out the right-angle ball (3).

6. The online serviceable integrated marine valve of claim 1, wherein, ​ 7. The online serviceable integrated marine valve of claim 3, wherein, ​ 8. The online serviceable integrated marine valve of claim 1, wherein, The utility model also includes a tool for disassembling the four split rings (22), the fixed ring (6) and the straight-through sphere (2), the tool comprising a pressing ring (31), a pressing rod (32) arranged on the pressing ring (31), a support plate (33) arranged on the pressing ring (31) and corresponding to the pressing rod (32), a joint bolt (34) penetrating through the support plate (33), and a joint nut (35) matched with the joint bolt (34).

9. An online serviceable integrated marine valve according to any one of claims 1 to 8, characterized in that, The valve cover (5) is installed at the maintenance opening through a bolt assembly.

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