Detachable jacket heat preservation ultrahigh-pressure high-temperature ball valve for butt welding heat preservation pipeline

Abstract

The utility model discloses a detachable jacket heat preservation ultrahigh pressure high temperature ball valve for butt welding heat preservation pipelines, which comprises a valve body, a valve cover, a valve rod and a ball body, the valve rod penetrates through the valve body, and one end of the valve rod located in an inner cavity of the valve body is in linkage connection with the ball body. An inlet valve seat assembly and an outlet valve seat assembly are arranged at the positions, corresponding to the two sides of the ball body, in the valve body respectively, and the valve deck is installed at the outlet end of the valve body. The inlet heat preservation jacket is arranged on the periphery of the valve body and the periphery of the valve deck and forms a first heat preservation cavity, and the high-pressure welding neck flange is detachably connected to the end of the valve deck through a fastener; the outlet heat preservation jacket is arranged on the periphery of the high-pressure butt welding flange and forms a second heat preservation cavity. The utility model not only can keep the original butt welding connection form of the thermal insulation pipe and the butt welding connection form of the high-pressure pipeline and the valve unchanged, but also can be conveniently disassembled and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a detachable jacket insulation ultra-high pressure and high temperature ball valve used for butt-welding insulation pipelines. Background Art

[0002] Prior to this, the State Intellectual Property Office disclosed a patent for "an ultra-high pressure jacketed insulated ball valve for insulated pipes", with the authorization announcement number: CN 201462048 U. This patent is mainly to solve the problem of preventing crystallization and solidification of pipeline valves for transporting high-pressure liquid sulfur in industrial production equipment for direct coal liquefaction, and provides an ultra-high pressure jacketed insulated ball valve device that can insulate the high-pressure sealing medium together with the insulated pipe.

[0003] After the actual application of this product, some new problems have also emerged. The most important and critical problem is that the valve cannot be dismantled and repaired after internal leakage or problems. Since the valve housing, the connection with the pipeline, and the connection between the insulation jacket and the insulation pipeline are all welded, if it needs to be dismantled, the installation pipeline must be cut with hot work. Moreover, even if the valve is cut with hot work during parking, it is impossible to completely correctly judge the exact cutting position. After the valve is cut, it is actually impossible to dismantle and repair it again, which brings disadvantages to the maintenance of industrial equipment in terms of time and cost. Utility Model Content

[0004] The purpose of the utility model is to provide a detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes. The utility model can not only keep the original butt-welding connection of the insulated pipe and the butt-welding connection between the high-pressure pipe and the valve unchanged, but also can be easily dismantled and maintained.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detachable jacketed insulated ultra-high-pressure and high-temperature ball valve for butt-welding insulated pipes, comprising a valve body, a valve cover, a valve stem and a ball, the valve stem passes through the valve body, and one end of the valve stem is located in the inner cavity of the valve body and is linked to the ball, an inlet valve seat assembly and an outlet valve seat assembly are respectively provided at positions corresponding to both sides of the ball in the valve body, and the valve cover is installed at the outlet end of the valve body; it also includes an inlet insulation jacket, an outlet insulation jacket and a high-pressure butt-welding flange, the inlet insulation jacket is arranged on the periphery of the valve body and the valve cover and forms a first insulation cavity, the high-pressure butt-welding flange is detachably connected to the end of the valve cover by fasteners, and the outlet insulation jacket is arranged on the periphery of the high-pressure butt-welding flange and forms a second insulation cavity.

[0006] By adopting the above technical solution, when it is necessary to dismantle the insulated pipe and the valve, only the fasteners need to be removed, and the entire valve can be easily removed from the high-pressure pipe and the insulated pipe for repair and maintenance, which greatly facilitates the maintenance of industrial equipment in terms of time and cost.

[0007] The utility model is further configured to include a bypass pipeline for connecting the first insulation cavity and the second insulation cavity, wherein the bypass pipeline includes a first pipeline connected to the inlet insulation jacket and a second pipeline connected to the outlet insulation jacket, and the first pipeline and the second pipeline are detachably connected together.

[0008] By adopting the above technical solution, the first insulation cavity and the second insulation cavity are connected, which can ensure that the insulation medium in the two is common and the temperature is more stable.

[0009] The utility model is further configured such that the bypass pipeline also includes a locking nut, the locking nut is sleeved on the outer periphery of the first pipeline, the outer periphery of the first pipeline is provided with a stopper, the inner periphery of the locking nut is provided with a limiting flange that forms a limiting match with the stopper, the second pipeline is provided with a threaded portion that matches with the locking nut thread, and a high-temperature sealing gasket is sandwiched between the first pipeline and the second pipeline.

[0010] By adopting the above technical solution, the first pipeline and the second pipeline can be quickly connected, and when disassembling, the interface can be easily removed by simply rotating the locking nut counterclockwise, which is very convenient to operate.

[0011] The utility model is further configured such that the first pipeline includes a first vertical pipeline, a first elbow and a first horizontal pipeline welded together in sequence, the second pipeline includes a second vertical pipeline, a second elbow and a second horizontal pipeline welded together in sequence, the first vertical pipeline and the second vertical pipeline are respectively welded to the inlet insulation jacket and the outlet insulation jacket, and the first horizontal pipeline and the second horizontal pipeline are detachably connected.

[0012] By adopting the above technical solution, the structure is simple and reliable, which is conducive to assembly and production.

[0013] The utility model is further configured as follows: the inlet insulation jacket comprises a first straight pipe section and a first curved pipe section, the first straight pipe section is welded to the valve cover, one end of the first curved pipe section is welded to the first straight pipe section, the outlet insulation jacket comprises a second straight pipe section and a second curved pipe section, the second straight pipe section is welded to the high-pressure butt welding flange, and one end of the second curved pipe section is welded to the second straight pipe section.

[0014] By adopting the above technical solution, the installation and connection of the inlet insulation jacket and the outlet insulation jacket are facilitated.

[0015] The utility model is further configured such that a metal sealing ring is sandwiched between the valve cover and the high-pressure butt-welding flange.

[0016] By adopting the above technical solution, the sealing between the valve cover and the high-pressure butt-welding flange can be ensured, and the leakage of the medium from the gap between the two can be avoided.

[0017] The utility model is further configured that the valve cover and the valve body are welded together after being threadedly matched.

[0018] By adopting the above technical solution, the structure is simple and reliable, easy to assemble, and has good sealing performance.

[0019] The utility model is further configured as follows: the inlet valve seat assembly includes a first valve seat, a sealing ring, a pressure ring, a disc spring and a sand prevention ring; a first mounting groove is provided in the valve body; a first sealing groove is provided at the inner end of the first mounting groove; the first valve seat and the disc spring are slidably arranged in the first mounting groove; the sealing ring and the pressure ring are arranged in the first sealing groove; and an end of the pressure ring away from the sealing ring is tightly pressed against an end of the disc spring away from the first valve seat.

[0020] By adopting the above technical solution, when the medium flows in the forward direction, the disc spring acts on the first valve seat, causing the first valve seat to press against the ball, which has the advantage of better sealing.

[0021] The utility model is further configured such that a first conical sealing surface is provided at one end of the first valve seat away from the sphere, and a second conical sealing surface matching the first conical sealing surface is provided on the inner wall of the valve body, and the first conical sealing surface and the second conical sealing surface form a conical metal hard sealing pair.

[0022] By adopting the above technical solution, when the reverse pressure of the medium is greater, the medium force pushes the ball to force the first valve seat to move in the reverse direction, thereby forming a tight seal of the conical metal hard sealing pair, thereby realizing the reverse sealing function of the valve.

[0023] The utility model is further configured as follows: the outlet valve seat assembly includes a second valve seat and a pressure plate, the inner end of the valve cover is provided with a second mounting groove, the pressure plate is connected to the inner end of the valve cover by screws and presses the second valve seat into the second mounting groove, the end of the second valve seat away from the sphere is provided with a first planar sealing surface, and the inner end of the second mounting groove is provided with a second planar sealing surface that fits tightly with the first planar sealing surface.

[0024] By adopting the above technical solution, the installation structure is simple and reliable, and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 for Figure 1 The enlarged structural diagram of the middle A part;

[0027] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0028] In the figure: 1. valve body; 2. valve cover; 3. valve stem; 4. ball; 5. inlet valve seat assembly; 6. outlet valve seat assembly; 7. inlet insulation jacket; 8. outlet insulation jacket; 9. high-pressure butt welding flange; 10. first insulation cavity; 11. fastener; 12. second insulation cavity; 13. bypass pipeline; 14. first pipeline; 15. second pipeline; 16. locking nut; 17. stopper; 18. limit flange; 19. threaded part; 20. high-temperature sealing gasket; 21. first vertical pipeline; 22. first elbow; 23. first horizontal pipeline; 24. second vertical pipeline Straight pipeline; 25, second elbow; 26, second horizontal pipeline; 27, first straight pipe section; 28, first curved pipe section; 29, second straight pipe section; 30, second curved pipe section; 31, metal sealing ring; 32, first valve seat; 33, sealing ring; 34, pressure ring; 35, disc spring; 36, sand prevention ring; 37, first mounting groove; 38, first sealing groove; 39, first conical sealing surface; 40, second conical sealing surface; 41, second valve seat; 42, pressure plate; 43, second mounting groove; 44, screw; 45, first plane sealing surface; 46, second plane sealing surface. DETAILED DESCRIPTION

[0029] 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.

[0030] Example: As attached Figures 1 to 3A detachable jacketed insulated ultra-high-pressure and high-temperature ball valve for butt-welding insulated pipes is shown, comprising a valve body 1, a valve cover 2, a valve stem 3 and a ball 4, wherein the valve stem 3 passes through the valve body 1, and one end of the valve stem 3 located in the inner cavity of the valve body 1 is linked to the ball 4, an inlet valve seat assembly 5 and an outlet valve seat assembly 6 are respectively provided at positions corresponding to both sides of the ball 4 in the valve body 1, and the valve cover 2 is installed at the outlet end of the valve body 1; it also includes an inlet insulation jacket 7, an outlet insulation jacket 8 and a high-pressure butt-welding flange 9 (RTJ metal ring flange), wherein the inlet insulation jacket 7 is arranged on the periphery of the valve body 1 and the valve cover 2 and forms a first insulation cavity 10, the high-pressure butt-welding flange 9 is detachably connected to the end of the valve cover 2 by a fastener 11, and the outlet insulation jacket 8 is arranged on the periphery of the high-pressure butt-welding flange 9 and forms a second insulation cavity 12. When the insulated pipe and the valve need to be disassembled, only the fastener 11 needs to be removed, and the entire valve can be easily removed from the high-pressure pipe and the insulated pipe for repair and maintenance, which greatly facilitates the maintenance of the industrial device in terms of time and cost.

[0031] As attached Figure 2 As shown, a bypass pipeline 13 is also included for connecting the first insulation cavity 10 and the second insulation cavity 12, and the bypass pipeline 13 includes a first pipeline 14 connected to the inlet insulation jacket 7 and a second pipeline 15 connected to the outlet insulation jacket 8, and the first pipeline 14 and the second pipeline 15 are detachably connected together. The first insulation cavity 10 and the second insulation cavity 12 are connected to each other, which can ensure that the insulation medium in the two is common and the temperature is more stable.

[0032] As attached Figure 3 As shown, the bypass pipeline 13 also includes a locking nut 16, which is sleeved on the outer periphery of the first pipeline 14, and a stopper 17 is provided on the outer periphery of the first pipeline 14. A limiting flange 18 is provided on the inner periphery of the locking nut 16 to form a limiting fit with the stopper 17. A threaded portion 19 is provided on the second pipeline 15 to threadably fit with the locking nut 16, and a high-temperature sealing gasket 20 is sandwiched between the first pipeline 14 and the second pipeline 15. This design can realize the rapid docking of the first pipeline 14 and the second pipeline 15, and when disassembling, only the locking nut 16 needs to be rotated counterclockwise, and the interface can be easily removed, which is very convenient to operate.

[0033] As attached Figure 2As shown, the first pipeline 14 includes a first vertical pipeline 21, a first elbow 22 and a first horizontal pipeline 23 welded together in sequence, the second pipeline 15 includes a second vertical pipeline 24, a second elbow 25 and a second horizontal pipeline 26 welded together in sequence, the first vertical pipeline 21 and the second vertical pipeline 24 are respectively welded to the inlet insulation jacket 7 and the outlet insulation jacket 8, and the first horizontal pipeline 23 and the second horizontal pipeline 26 are detachably connected. The design structure is simple and reliable, and is conducive to assembly production.

[0034] As attached Figure 2 As shown, the inlet insulation jacket 7 includes a first straight pipe section 27 and a first curved pipe section 28, the first straight pipe section 27 is welded to the valve cover 2, one end of the first curved pipe section 28 is welded to the first straight pipe section 27, and the welding groove setting size of the first curved pipe section 28 is consistent with the welding groove size of the user's insulation pipe; the outlet insulation jacket 8 includes a second straight pipe section 29 and a second curved pipe section 30, the second straight pipe section 29 is welded to the high-pressure butt welding flange 9, one end of the second curved pipe section 30 is welded to the second straight pipe section 29, and the welding groove setting size of the second curved pipe section 30 is consistent with the welding groove size of the user's insulation pipe. This design facilitates the installation and connection of the inlet insulation jacket 7 and the outlet insulation jacket 8.

[0035] As attached Figure 2 As shown, a metal sealing ring 31 is sandwiched between the valve cover 2 and the high-pressure butt-welding flange 9, and the fastener 11 is a combination of studs and nuts, and the connection and sealing are performed by tightening the studs and nuts. This design can ensure the sealing between the valve cover 2 and the high-pressure butt-welding flange 9 and prevent the medium from leaking from the gap between the two.

[0036] As attached Figure 2 As shown, the valve cover 2 and the valve body 1 are welded together through threaded engagement to form a valve housing. The structure is simple and reliable, easy to assemble, and has good sealing performance.

[0037] As attached Figure 2 As shown, the inlet valve seat assembly 5 includes a first valve seat 32, a sealing ring 33, a pressure ring 34, a disc spring 35 and a sand-proof ring 36, which form a sealing pair at the inlet end with the ball 4. A first mounting groove 37 is provided in the valve body 1, and a first sealing groove 38 is provided at the inner end of the first mounting groove 37. The first valve seat 32 and the disc spring 35 are slidably arranged in the first mounting groove 37. The sealing ring 33 and the pressure ring 34 are arranged in the first sealing groove 38, and the end of the pressure ring 34 away from the sealing ring 33 is tightly pressed against the end of the disc spring 35 away from the first valve seat 32. When the medium flows in the forward direction, the disc spring 35 acts on the first valve seat 32, prompting the first valve seat 32 to press against the ball 4, which has the advantage of better sealing performance.

[0038] The first valve seat 32 is provided with a first conical sealing surface 39 at one end away from the ball 4, and the inner wall of the valve body 1 is provided with a second conical sealing surface 40 matched with the first conical sealing surface 39. The first conical sealing surface 39 and the second conical sealing surface 40 form a conical metal hard sealing pair, and the angle of the sealing pair is 60°. When the reverse pressure of the medium is greater, the medium force pushes the ball 4 to force the first valve seat 32 to move in the reverse direction, so that a tight seal of the conical metal hard sealing pair can be formed, realizing the reverse sealing function of the valve.

[0039] The outlet valve seat assembly 6 includes a second valve seat 41 and a pressure plate 42. The inner end of the valve cover 2 is provided with a second mounting groove 43. The pressure plate 42 is connected to the inner end of the valve cover 2 by screws 44 and presses the second valve seat 41 into the second mounting groove 43. The end of the second valve seat 41 away from the ball 4 is provided with a first planar sealing surface 45. The inner end of the second mounting groove 43 is provided with a second planar sealing surface 46 that fits tightly with the first planar sealing surface 45. The first planar sealing surface 45 and the second planar sealing surface 46 are both provided with a hardened layer and are formed into a 100% matching sealing pair through matching and grinding. Under the thrust of the disc spring 35 and the force of the inlet medium, the first valve seat 32, the ball 4 and the second valve seat 41 are pushed to contact and fit more closely, forming a tight sealing performance under low pressure, high pressure and high temperature.

Claims

1. A detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes, comprising a valve body (1), a valve cover (2), a valve stem (3) and a ball (4), wherein the valve stem (3) passes through the valve body (1), and one end of the valve stem (3) located in the inner cavity of the valve body (1) is linked to the ball (4), an inlet valve seat assembly (5) and an outlet valve seat assembly (6) are respectively provided at positions corresponding to both sides of the ball (4) in the valve body (1), and the valve cover (2) is installed at the outlet end of the valve body (1); characterized in that: The invention also comprises an inlet insulation jacket (7), an outlet insulation jacket (8) and a high-pressure butt-welding flange (9), wherein the inlet insulation jacket (7) is arranged on the periphery of the valve body (1) and the valve cover (2) and forms a first insulation cavity (10), the high-pressure butt-welding flange (9) is detachably connected to the end of the valve cover (2) via a fastener (11), and the outlet insulation jacket (8) is arranged on the periphery of the high-pressure butt-welding flange (9) and forms a second insulation cavity (12).

2. A detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: The invention also comprises a bypass pipeline (13) for connecting the first thermal insulation cavity (10) and the second thermal insulation cavity (12), wherein the bypass pipeline (13) comprises a first pipeline (14) connected to the inlet thermal insulation jacket (7) and a second pipeline (15) connected to the outlet thermal insulation jacket (8), and the first pipeline (14) and the second pipeline (15) are detachably connected together.

3. A detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 2, characterized in that: The bypass pipeline (13) also includes a locking nut (16), which is sleeved on the outer periphery of the first pipeline (14), and the outer periphery of the first pipeline (14) is provided with a stopper (17), and the inner periphery of the locking nut (16) is provided with a limiting flange (18) that forms a limiting fit with the stopper (17), and the second pipeline (15) is provided with a threaded portion (19) that is threadedly matched with the locking nut (16), and a high-temperature sealing gasket (20) is sandwiched between the first pipeline (14) and the second pipeline (15).

4. A detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 2, characterized in that: The first pipeline (14) comprises a first vertical pipeline (21), a first elbow (22) and a first horizontal pipeline (23) which are welded together in sequence, and the second pipeline (15) comprises a second vertical pipeline (24), a second elbow (25) and a second horizontal pipeline (26) which are welded together in sequence, the first vertical pipeline (21) and the second vertical pipeline (24) are welded together with an inlet insulation jacket (7) and an outlet insulation jacket (8) respectively, and the first horizontal pipeline (23) and the second horizontal pipeline (26) are detachably connected.

5. The detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: The inlet insulation jacket (7) comprises a first straight pipe section (27) and a first curved pipe section (28); the first straight pipe section (27) is welded to the valve cover (2); one end of the first curved pipe section (28) is welded to the first straight pipe section (27); the outlet insulation jacket (8) comprises a second straight pipe section (29) and a second curved pipe section (30); the second straight pipe section (29) is welded to the high-pressure butt-welding flange (9); one end of the second curved pipe section (30) is welded to the second straight pipe section (29).

6. The detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: A metal sealing ring (31) is sandwiched between the valve cover (2) and the high-pressure butt-welding flange (9).

7. The detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: The valve cover (2) and the valve body (1) are welded together after being threaded together.

8. The detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: The inlet valve seat assembly (5) comprises a first valve seat (32), a sealing ring (33), a pressure ring (34), a disc spring (35) and a sand-proof ring (36); a first mounting groove (37) is provided in the valve body (1); a first sealing groove (38) is provided at the inner end of the first mounting groove (37); the first valve seat (32) and the disc spring (35) are slidably arranged in the first mounting groove (37); the sealing ring (33) and the pressure ring (34) are arranged in the first sealing groove (38); and an end of the pressure ring (34) away from the sealing ring (33) is tightly pressed against an end of the disc spring (35) away from the first valve seat (32).

9. A detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 8, characterized in that: A first conical sealing surface (39) is provided at one end of the first valve seat (32) away from the spherical body (4), and a second conical sealing surface (40) matching with the first conical sealing surface (39) is provided on the inner wall of the valve body (1), and the first conical sealing surface (39) and the second conical sealing surface (40) form a conical metal hard sealing pair.

10. The detachable jacketed insulated ultra-high pressure and high temperature ball valve for butt-welding insulated pipes according to claim 1, characterized in that: The outlet valve seat assembly (6) comprises a second valve seat (41) and a pressure plate (42); a second mounting groove (43) is provided at the inner end of the valve cover (2); the pressure plate (42) is connected to the inner end of the valve cover (2) by means of screws (44) and presses the second valve seat (41) into the second mounting groove (43); a first planar sealing surface (45) is provided at one end of the second valve seat (41) away from the sphere (4); and a second planar sealing surface (46) which is in close contact with the first planar sealing surface (45) is provided at the inner end of the second mounting groove (43).

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