High-pressure hard sealing floating ball valve

Abstract

The utility model discloses a high-pressure hard sealing floating ball valve, which relates to the technical field of floating ball valves and comprises a valve body and a floating sealing unit. The floating sealing unit comprises an installation sliding groove, a limiting block, an insertion block, a clamping plate, a first spring and an installation sliding rod. The floating sealing ball valve is provided with a reliable floating sealing unit, when the valve ball is subjected to pressure of fluid, the valve ball deviates towards one side, the first spring on the corresponding side is compressed, restoring force is provided for the valve ball, the first springs on the two sides jointly act to enable the valve ball to always keep the centering trend, and therefore the sealing rings on the two sides can be tightly attached to the valve ball, and the sealing effect is good. A good sealing effect is ensured; the valve seat is used for mounting the sealing rings, the telescopic rod is embedded in a mounting groove in the valve seat, the telescopic rod is used for sleeving the second spring, and under the action of the second spring, the sealing rings on the left side and the right side can be tightly attached to the outer side of the valve ball at the same time to effectively bear internal high pressure, so that the sealing tightness is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of floating ball valves, in particular to a high-pressure hard-sealed floating ball valve. Background Technique

[0002] A ball valve whose ball does not have a fixed shaft is called a floating ball valve, also known as a floating ball valve. The main feature of a floating ball valve is that the ball has no support shaft, and the ball is clamped by two valve seats and is in a "floating" state. It is mainly used for cutting, distributing and changing the flow direction of the medium in pipelines; floating ball valves are widely used, generally for industrial use, and are suitable for industries such as petrochemical, metallurgy, etc. and natural gas long-distance pipelines with severe corrosion such as hydrogen sulfide-containing media;

[0003] In the existing floating ball valve, when the valve is in the cut-off state, due to the existence of liquid pressure, a certain pressure will be exerted on the valve ball, resulting in a slight displacement of the valve ball, which is likely to cause the sealing effect to deteriorate. Moreover, the existing one-way floating ball valve only has a sealing component installed at the discharge end, and cannot ensure a good sealing effect. For this reason, we propose a high-pressure hard-sealed floating ball valve. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-pressure hard-sealed floating ball valve, which has a reliable floating sealing unit. When the valve ball is subjected to the pressure of the fluid, the valve ball deflects to one side, and the spring I on the corresponding side is compressed, providing a restoring force to the valve ball. The two springs I on both sides act together to enable the valve ball to always maintain a centering tendency, so that the sealing rings on both sides can be closely attached to the valve ball, ensuring a good sealing effect; the valve seat is used for the installation of the sealing ring, the telescopic rod is embedded in the installation groove inside the valve seat, and the telescopic rod is used for sleeving the spring II. Under the action of the spring II, the sealing rings on the left and right sides can be simultaneously and closely attached to the outside of the valve ball, effectively withstanding the internal high pressure, thereby further improving the tightness of the seal, and can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a high-pressure hard-sealed floating ball valve, including a valve body and a floating sealing unit;

[0006] Valve body: A valve ball is installed inside, a fixed pipe flange is fixedly connected to the right side of the valve body, and a movable pipe flange is fixedly installed on the left side of the valve body;

[0007] Floating seal unit: It includes an installation chute, a limit block, an insertion block, a clamping plate, a first spring and an installation slide rod. A horizontal installation chute is provided in the middle of the upper end of the valve ball. The cross-section of the installation chute is a convex-shaped structure. The limit block is a circular structure, and its upper end is clamped at the top of the inner wall of the valve body. The lower end of the limit block is fixedly connected with an insertion block, and the insertion block is inserted into the interior of the installation chute. Clamping plates are fixedly connected to the front and rear sides of its lower end. The clamping plates are inserted into and slidably connected to the front and rear sides of the convex-shaped installation chute. Two installation slide rods are fixedly connected inside the installation chute. The two installation slide rods horizontally pass through the interior of the insertion block, and the installation slide rods and the insertion block maintain a sliding connection. A first spring is sleeved on each section of the installation slide rod located on both sides of the insertion block.

[0008] The valve body is used for the installation of the valve ball and other ball valve components. The valve ball controls the opening and closing of the valve driven by the valve stem. The upper end of the limit block is clamped at the top of the valve body from the inside, so as to prevent the upper valve stem from flying out under the pressure of water. The insertion block at the lower end of the limit block is inserted into the installation chute. The clamping plates on both sides can clamp the insertion block inside the installation chute and enable the valve ball to slide horizontally relative to the insertion block. The installation slide rods are used for the installation of the first springs on both sides. When the valve ball is subjected to the pressure of the fluid, the valve ball deflects to one side, and the first spring on the corresponding side is compressed, providing a restoring force to the valve ball. The first springs on both sides act together to enable the valve ball to always maintain a tendency to be centered, so that the sealing rings on both sides can be closely attached to the valve ball, ensuring a good sealing effect.

[0009] Furthermore, the floating seal unit further includes a valve seat, an installation groove, a telescopic rod, a second spring and a sealing ring. Annular valve seats are fixedly connected to the ends of the movable pipe flange and the fixed pipe flange extending into the valve body. An annular installation groove is provided inside the valve seat. Six telescopic rods are fixedly connected in a circumferential array inside the installation groove. A second spring is sleeved on the outside of each telescopic rod. The outer ends of the telescopic rods are fixedly connected to the side of the sealing ring. The sealing ring is slidably connected to the port of the installation groove, and the side of the sealing ring close to the valve ball is an arc-shaped fitting surface. The valve seat is used for the installation of the sealing ring. The telescopic rods are embedded in the installation groove inside the valve seat. The telescopic rods are used for sleeving the second springs. Under the action of the second springs, the sealing rings on the left and right sides can be simultaneously closely attached to the outside of the valve ball, effectively withstanding the internal high pressure, thereby further improving the tightness of the seal.

[0010] Furthermore, it further includes a valve stem, a plug connector and a sleeve. A sleeve is fixedly connected to the middle of the upper end of the valve body. A vertical valve stem is arranged inside the sleeve. The lower end of the valve stem is fixedly connected to the center position of the upper end of the limit block. A square plug connector is fixedly connected to the upper end of the valve stem. The sleeve is used for the installation of the valve stem and the valve cover sealing assembly. The square plug connector at the upper end of the valve stem can prevent relative rotation.

[0011] Further, it also includes a gasket and a threaded gland. A gasket is provided at a lower position inside the sleeve. A threaded gland is screwed and connected at the middle position inside the sleeve, and the lower end of the threaded gland presses on the upper side of the gasket. The gasket is used to achieve a sealing effect between the valve stem, the sleeve and the valve body. The threaded gland is screwed inside the sleeve to press and fix the gasket.

[0012] Further, it also includes a connection cover, a handle and a pin. The insertion joint at the upper end of the valve stem is inserted into the lower end of the connection cover, and the upper end of the connection cover is fixedly connected with the handle through the pin. The connection cover is used for the connection between the handle and the valve stem, and the pin fixes the handle on the upper side of the connection cover.

[0013] Further, it also includes bolt fasteners. One end of the movable pipe flange close to the valve body is fixedly connected with a flange plate having the same size as the left port of the valve body, and this flange plate is fixedly connected with the flange plate at the left end of the valve body through bolt fasteners. The bolt fasteners are used for the fixed connection between the movable pipe flange and the valve body, and facilitate the disassembly of the movable pipe flange for the installation of the internal parts of the ball valve and the maintenance of the inside of the ball valve.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This high-pressure hard-sealed floating ball valve has the following advantages:

[0015] 1. It has a reliable floating seal unit. When the valve ball is subjected to the pressure of the fluid, the valve ball deflects to one side, and the spring I on the corresponding side is compressed, providing a restoring force to the valve ball. The two springs I work together to enable the valve ball to always maintain a tendency to be centered, so that the two sealing rings can be closely attached to the valve ball, ensuring a good sealing effect;

[0016] 2. The valve seat is used for the installation of the sealing ring. The telescopic rod is embedded in the installation groove inside the valve seat. The telescopic rod is used for sleeving the spring II. Under the action of the spring II, the sealing rings on the left and right sides can be simultaneously closely attached to the outside of the valve ball, effectively withstanding the internal high pressure, thereby further improving the tightness of the seal;

[0017] 3. This utility model has a reliable floating seal unit. When the valve ball is subjected to the pressure of the fluid, the valve ball deflects to one side, and the spring I on the corresponding side is compressed, providing a restoring force to the valve ball. The two springs I work together to enable the valve ball to always maintain a tendency to be centered, so that the two sealing rings can be closely attached to the valve ball, ensuring a good sealing effect; the valve seat is used for the installation of the sealing ring. The telescopic rod is embedded in the installation groove inside the valve seat. The telescopic rod is used for sleeving the spring II. Under the action of the spring II, the sealing rings on the left and right sides can be simultaneously closely attached to the outside of the valve ball, effectively withstanding the internal high pressure, thereby further improving the tightness of the seal. Description of the Drawings

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] Figure 2 is a schematic internal structure view of the present utility model;

[0020] Figure 3 is a schematic partial structure view of the present utility model;

[0021] Figure 4 is an oblique view of a partial structure of the present utility model;

[0022] Figure 5 is the present utility model Figure 4 enlarged view of the structure at position A in;

[0023] Figure 6 is the present utility model Figure 2 enlarged view of the structure at position B in.

[0024] In the figure: 1 valve body, 2 valve ball, 3 floating seal unit, 31 installation chute, 32 limit block, 33 insertion block, 34 clamping plate, 35 first spring, 36 installation slide rod, 37 valve seat, 38 installation groove, 39 telescopic rod, 310 second spring, 311 sealing ring, 4 valve stem, 5 insertion joint, 6 connection cover, 7 handle, 8 pin, 9 gasket, 10 threaded gland, 11 sleeve, 12 movable pipe flange, 13 bolt fastener, 14 fixed pipe flange. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-6 , this embodiment provides a technical solution: a high-pressure hard-sealed floating ball valve, including a valve body 1 and a floating seal unit 3;

[0027] Valve body 1: A valve ball 2 is installed inside, a fixed pipe flange 14 is fixedly connected to the right side of the valve body 1, and a movable pipe flange 12 is fixedly installed on the left side of the valve body 1;

[0028] Floating seal unit 3: It includes an installation chute 31, a limit block 32, an insertion block 33, a clamping plate 34, a first spring 35 and an installation slide rod 36. A horizontal installation chute 31 is opened in the middle of the upper end of the valve ball 2. The cross-section of the installation chute 31 is a convex-shaped structure. The limit block 32 is a circular structure, and its upper end is clamped at the top of the inner wall of the valve body 1. The lower end of the limit block 32 is fixedly connected with an insertion block 33. The insertion block 33 is inserted into the interior of the installation chute 31, and clamping plates 34 are fixedly connected to the front and rear sides of its lower end. The clamping plates 34 are inserted into and slidably connected to the front and rear sides of the convex-shaped installation chute 31. Two installation slide rods 36 are fixedly connected inside the installation chute 31. The two installation slide rods 36 horizontally pass through the interior of the insertion block 33, and the installation slide rods 36 and the insertion block 33 maintain a sliding connection. A first spring 35 is sleeved on each section of the installation slide rods 36 located on both sides of the insertion block 33.

[0029] The valve body 1 is used for the installation of the valve ball 2 and other ball valve components. The valve ball 2 controls the opening and closing of the valve under the drive of the valve rod 4. The upper end of the limit block 32 is clamped inside the top of the valve body 1 from the inside, so as to prevent the upper valve rod 4 from flying out under the pressure of water. The insertion block 33 at the lower end of the limit block 32 is inserted into the installation chute 31. The clamping plates 34 on both sides can clamp the insertion block 33 inside the installation chute 31 and enable the valve ball 2 to slide horizontally relative to the insertion block 33. The installation slide rods 36 are used for the installation of the first springs 35 on both sides. When the valve ball 2 is subjected to the pressure of the fluid, the valve ball 2 deflects to one side, and the first spring 35 on the corresponding side is compressed, providing a restoring force to the valve ball 2. The first springs 35 on both sides act together to enable the valve ball 2 to always maintain a tendency to be centered, so that the sealing rings 311 on both sides can be closely attached to the valve ball 2, ensuring a good sealing effect.

[0030] The floating seal unit 3 further includes a valve seat 37, an installation groove 38, a telescopic rod 39, a second spring 310 and a sealing ring 311. Annular valve seats 37 are fixedly connected to the ends of the movable pipe flange 12 and the fixed pipe flange 14 extending into the interior of the valve body 1. An annular installation groove 38 is opened inside the valve seat 37. Six telescopic rods 39 are fixedly connected in a circumferential array inside the installation groove 38. A second spring 310 is sleeved on the outside of each telescopic rod 39. The outer ends of the telescopic rods 39 are fixedly connected to the side of the sealing ring 311. The sealing ring 311 is slidably connected to the port of the installation groove 38, and the side of the sealing ring 311 close to the valve ball 2 is an arc-shaped fitting surface. The valve seat 37 is used for the installation of the sealing ring 311. The telescopic rods 39 are embedded in the installation groove 38 inside the valve seat 37. The telescopic rods 39 are used for the sleeving of the second springs 310. Under the action of the second springs 310, the sealing rings 311 on the left and right sides can be simultaneously closely attached to the outside of the valve ball 2, effectively withstanding the internal high pressure, thereby further improving the tightness of the seal.

[0031] It also includes a valve stem 4, a socket joint 5 and a sleeve 11. In the middle of the upper end of the valve body 1, there is a fixedly connected sleeve 11. Inside the sleeve 11, there is a vertical valve stem 4. The lower end of the valve stem 4 is fixedly connected to the center position of the upper end of the limit block 32. The upper end of the valve stem 4 is fixedly connected with a square socket joint 5. The sleeve 11 is used for the installation of the valve stem 4 and the valve cover sealing assembly. The square socket joint 5 at the upper end of the valve stem 4 can prevent relative rotation.

[0032] It also includes a gasket 9 and a threaded gland 10. A gasket 9 is arranged at a lower position inside the sleeve 11. A threaded gland 10 is screwed and connected at the middle position inside the sleeve 11. The lower end of the threaded gland 10 presses on the upper side of the gasket 9. The gasket 9 is used to achieve a sealing effect between the valve stem 4, the sleeve 11 and the valve body 1. The threaded gland 10 is screwed inside the sleeve 11 to press and fix the gasket 9.

[0033] It also includes a connecting cover 6, a handle 7 and a pin 8. The socket joint 5 at the upper end of the valve stem 4 is inserted into the lower end of the connecting cover 6. The upper end of the connecting cover 6 is fixedly connected with a handle 7 through a pin 8. The connecting cover 6 is used for the connection between the handle 7 and the valve stem 4. The pin 8 fixes the handle 7 on the upper side of the connecting cover 6.

[0034] It also includes a bolt fastener 13. One end of the movable pipe flange 12 close to the valve body 1 is fixedly connected with a flange plate having the same size as the left port of the valve body 1, and this flange plate is fixedly connected with the flange plate at the left end of the valve body 1 through the bolt fastener 13. The bolt fastener 13 is used for the fixed connection between the movable pipe flange 12 and the valve body 1, and it is convenient to disassemble the movable pipe flange 12 for the installation of the internal parts of the ball valve and for the maintenance of the inside of the ball valve.

[0035] The working principle of the high-pressure hard-sealed floating ball valve provided by the present utility model is as follows: This ball valve has a reliable floating seal unit 3. The valve body 1 is used for installing the valve ball 2 and other ball valve components. The valve ball 2 controls the opening and closing of the valve driven by the valve stem 4. The upper end of the limit block 32 is clamped inside the top of the valve body 1 from the inside, so as to prevent the upper valve stem 4 from flying out under the water pressure. The insertion block 33 at the lower end of the limit block 32 is inserted into the installation chute 31. The clamping plates 34 on both sides can clamp the insertion block 33 inside the installation chute 31 and enable the valve ball 2 to slide horizontally relative to the insertion block 33. The installation slide rod 36 is used for installing the first springs 35 on both sides. When the valve ball 2 is subjected to the pressure of the fluid, the valve ball 2 deflects to one side, and the first spring 35 on the corresponding side is compressed, providing a restoring force to the valve ball 2. The first springs 35 on both sides act together to enable the valve ball 2 to always maintain a tendency to be centered, so that the sealing rings 311 on both sides can be closely attached to the valve ball 2 to ensure a good sealing effect. The valve seat 37 is used for installing the sealing rings 311. The telescopic rod 39 is embedded in the installation groove 38 inside the valve seat 37. The telescopic rod 39 is used for sleeving the second spring 310. Under the action of the second spring 310, the sealing rings 311 on the left and right sides can be simultaneously closely attached to the outside of the valve ball 2 to effectively withstand the internal high pressure, thereby further improving the tightness of the seal. In addition, the sleeve 11 is used for installing the valve stem 4 and the valve cover sealing assembly. The square insertion joint 5 at the upper end of the valve stem 4 can prevent relative rotation. The sealing gasket 9 is used to achieve a sealing effect between the valve stem 4, the sleeve 11 and the valve body 1. The threaded gland 10 is screwed inside the sleeve 11 to press and fix the sealing gasket 9. The connecting cover 6 is used for connecting the handle 7 and the valve stem 4. The pin 8 fixes the handle 7 on the upper side of the connecting cover 6. The bolt fastener 13 is used for fixedly connecting the movable pipe flange 12 and the valve body 1, and is convenient for disassembling the movable pipe flange 12 to install the internal parts of the ball valve and for overhauling the inside of the ball valve.

[0036] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. High-pressure hard-seal floating ball valve, characterized by: It comprises a valve body (1) and a floating sealing unit (3); Valve body (1): a valve ball (2) is installed inside, a fixed pipe flange (14) is fixedly connected to the right side of the valve body (1), and a movable pipe flange (12) is fixedly installed on the left side of the valve body (1); The floating seal unit (3) comprises an installation groove (31), a limit block (32), an insert block (33), a clamping plate (34), a spring (35) and an installation slide rod (36). A transverse installation groove (31) is provided in the middle of the upper end of the valve ball (2). The cross section of the installation groove (31) is a convex structure. The limit block (32) is a circular structure, and its upper end is clamped on the top of the inner wall of the valve body (1). The lower end of the limit block (32) is fixedly connected with the insert block (33). The insert block (33) is inserted into the installation groove ( The insert block (33) is provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33). The mounting slide bars (36) are provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33). The mounting slide bars (36) are provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33). The mounting slide bars (36) are provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33). The mounting slide bars (36) are provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33). The mounting slide bars (36) are provided with a plurality of mounting slide bars (36) which are fixedly connected to the insert block (33).

2. The high pressure hard seal floating ball valve according to claim 1, characterized in that: The floating sealing unit (3) further comprises a valve seat (37), a mounting groove (38), a telescopic rod (39), a second spring (310) and a sealing ring (311); the ends of the movable pipe flange (12) and the fixed pipe flange (14) extending into the interior of the valve body (1) are fixedly connected to an annular valve seat (37); an annular mounting groove (38) is provided inside the valve seat (37); six telescopic rods (39) are fixedly connected in a circular array inside the mounting groove (38); a second spring (310) is sleeved on the outer side of each telescopic rod (39); the outer end of the telescopic rod (39) is fixedly connected to the side of the sealing ring (311); the sealing ring (311) is slidably connected to the end of the mounting groove (38); and the side of the sealing ring (311) close to the valve ball (2) is an arc-shaped fitting surface.

3. The high pressure hard seal floating ball valve according to claim 1, characterized in that: It also includes a valve stem (4), a plug connector (5) and a sleeve (11), wherein the sleeve (11) is fixedly connected to the middle of the upper end of the valve body (1), a vertical valve stem (4) is arranged inside the sleeve (11), the lower end of the valve stem (4) is fixedly connected to the center position of the upper end of the limit block (32), and the upper end of the valve stem (4) is fixedly connected to a square plug connector (5).

4. The high pressure hard seal floating ball valve according to claim 3 is characterized in that: It also includes a sealing gasket (9) and a threaded gland (10), wherein the sealing gasket (9) is arranged at a lower position inside the sleeve (11), and the threaded gland (10) is screwed and connected to the middle position inside the sleeve (11), and the lower end of the threaded gland (10) is pressed on the upper side of the threaded gland (10).

5. The high pressure hard seal floating ball valve according to claim 3 is characterized in that: It also includes a connecting cover (6), a handle (7) and a pin (8), wherein the plug connector (5) at the upper end of the valve stem (4) is inserted into the lower end of the connecting cover (6), and the upper end of the connecting cover (6) is fixedly connected to the handle (7) via the pin (8).

6. The high pressure hard seal floating ball valve according to claim 1, characterized in that: It also includes a bolt fastener (13), and one end of the movable pipe flange (12) close to the valve body (1) is fixedly connected to a flange plate with the same size as the left port of the valve body (1), and the flange plate is fixedly connected to the flange plate at the left end of the valve body (1) via the bolt fastener (13).

Images