Floating ball valve with good sealing effect

Abstract

The floating ball valve with the good sealing effect comprises a left shell, a right shell, a valve element, a valve rod and a handle, the left shell and the right shell are detachably connected together, a first groove is formed in the inner wall of the left shell, a first sealing ring making contact with the valve element is arranged in the first groove, and a second sealing ring making contact with the valve element is arranged in the second groove. A pair of pressing plates which are symmetrically distributed up and down and wrap the first sealing ring is further arranged in the first groove, a pair of butt joint pipes are arranged on the outer arc faces of the pressing plates, two sets of threaded pipes which are symmetrically distributed up and down are arranged on the outer surface of the left shell, threaded rods are in threaded connection with the interiors of the threaded pipes, and the bottom ends of the threaded rods abut against the interiors of the butt joint pipes. According to the utility model, after the first sealing ring is worn by the valve core for a long time, the upper and lower groups of screws are respectively rotated, the upper screw presses the pressing plate downwards, and the lower screw pushes the pressing plate upwards, so that the first sealing ring is pressed on the valve core again through the two pressing plates, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing gaskets, in particular to a floating ball valve with good sealing effect. Background Art

[0002] The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly against the sealing surface of the outlet end to ensure the sealing of the outlet end.

[0003] Existing floating ball valves generally have this problem. Due to the high pressure between the valve core and the sealing surface, the sealing ring on the sealing surface will soon be severely worn as the valve core rotates for a long time, and the sealing ring needs to be replaced regularly. Therefore, corresponding improvements are made to this problem, and a floating ball valve with good sealing effect is proposed, which can extend the service life of the sealing ring and reduce the replacement cycle of the sealing ring. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a floating ball valve with good sealing effect.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A floating ball valve with good sealing effect comprises a left shell and a right shell which are detachably connected together, a valve core, a valve stem and a handle, the inner wall of the left shell is provided with a first groove, a first sealing ring in contact with the valve core is arranged in the first groove, a pair of pressure plates symmetrically distributed up and down and covering the first sealing ring are also arranged in the first groove, a pair of butt joint tubes are arranged on the outer arc surface of the pressure plate, two groups of threaded tubes symmetrically distributed up and down are arranged on the outer surface of the left shell, a screw is connected to the inner thread of the threaded tube, and the bottom end of the screw is against the butt joint tube.

[0007] Preferably, a second groove is formed on one surface where the left shell and the right shell are connected, and a second sealing ring is disposed between the two second grooves.

[0008] Preferably, a plurality of circular holes are provided on one surface where the left shell and the right shell are connected, and bolt assemblies for fixing the left shell and the right shell together are inserted into the circular holes.

[0009] Preferably, a valve stem guide tube is provided on the right housing, the valve stem is located in the valve stem guide tube, and the bottom end of the valve stem is inserted into the valve core.

[0010] Preferably, a sealing sleeve which is tightly sleeved on the valve stem is arranged in the valve stem conduit, and a conical portion is provided on the valve stem conduit at a position which abuts against the top end of the sealing sleeve.

[0011] Preferably, the rectangular opening on the handle is sleeved on the top end of the valve stem, and a nut for tightening the handle is threadedly connected to the valve stem.

[0012] Preferably, a pair of slots are formed at one end of the handle close to the valve stem, and two slots are fixed on the top of the valve stem conduit, each of which can enter the slots.

[0013] The beneficial effects of the utility model are:

[0014] 1. A pressure plate is provided in the device. When the first sealing ring is worn by the valve core for a long time, the upper and lower sets of screws are rotated respectively, the upper screw presses the pressure plate downward, and the lower screw pushes the pressure plate upward, so that the first sealing ring is pressed onto the valve core again through the two pressure plates, thereby improving the sealing effect.

[0015] 2. The device is provided with a sealing sleeve and a tapered portion, through which the valve stem and the valve stem guide tube can be sealed, and by providing the tapered portion, the upward movement of the valve stem can be restricted, thereby fixing the valve stem and facilitating the disassembly and assembly of the valve stem.

[0016] 3. The device is provided with a clamping rod. When the handle is in a horizontal position, the clamping rod docks with one of the slots, and the ball valve is now in an open state. After the handle is turned counterclockwise by 90°, the other clamping rod docks with the other slot, and the ball valve is now closed, making operation convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a floating ball valve with good sealing effect proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a floating ball valve with good sealing effect proposed by the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of a proposed floating ball valve with good sealing effect at point A;

[0020] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure of a floating ball valve with good sealing effect at point B;

[0021] Figure 5 For this utility model Figure 1 A schematic diagram of the enlarged structure at C of a proposed floating ball valve with good sealing effect.

[0022] In the figure: 1. left shell; 2. right shell; 3. valve core; 4. valve stem; 5. handle; 6. valve stem guide tube; 7. first groove; 8. first sealing ring; 9. pressure plate; 10. butt joint; 11. screw rod; 12. second groove; 13. second sealing ring; 14. round hole; 15. bolt assembly; 16. sealing sleeve; 17. opening; 18. nut; 19. slot; 20. clamping rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5 A floating ball valve with good sealing effect comprises a left shell 1 and a right shell 2 which are detachably connected together, a valve core 3, a valve stem 4 and a handle 5. A first groove 7 is provided on the inner wall of the left shell 1. A first sealing ring 8 in contact with the valve core 3 is arranged in the first groove 7. A pair of pressure plates 9 symmetrically distributed up and down and enveloping the first sealing ring 8 are also arranged in the first groove 7. A pair of butt joints 10 are arranged on the outer arc surface of the pressure plate 9. Two groups of threaded pipes symmetrically distributed up and down are arranged on the outer surface of the left shell 1. A screw 11 is connected to the inner thread of the threaded pipe. The bottom end of the screw 11 is against the butt joint 10. When the first sealing ring 8 is subjected to long-term wear of the valve core 3, the upper and lower groups of screws 11 are rotated respectively. The screw 11 located at the upper side presses the pressure plate 9 downward, and the screw 11 located at the lower side pushes the pressure plate 9 upward, so that the first sealing ring 8 is pressed against the valve core 3 again through the two pressure plates 9, thereby improving the sealing effect.

[0025] Furthermore, a second groove 12 is provided on one side where the left shell 1 and the right shell 2 are connected, and a second sealing ring 13 is provided between the two second grooves 12. After the left shell 1 and the right shell 2 are installed together, the second sealing ring 13 can be used to seal the left shell 1 and the right shell 2.

[0026] Furthermore, a plurality of circular holes 14 are provided on one side where the left shell 1 and the right shell 2 are connected, and bolt assemblies 15 for fixing the left shell 1 and the right shell 2 together are inserted into the circular holes 14, so that the left shell 1 and the right shell 2 can be easily disassembled and assembled, and the subsequent replacement of the seal can also be facilitated.

[0027] Furthermore, a valve stem guide tube 6 is provided on the right housing 2 , the valve stem 4 is located in the valve stem guide tube 6 , and the bottom end of the valve stem 4 is inserted into the valve core 3 .

[0028] Furthermore, a sealing sleeve 16 is provided in the valve stem guide tube 6 and is tightly sleeved on the valve stem 4. A tapered portion is provided on the valve stem guide tube 6 at a position abutting against the top of the sealing sleeve 16. The sealing sleeve 16 can be used to seal the valve stem 4 and the valve stem guide tube 6. By providing the tapered portion, the upward movement of the valve stem 4 can be restricted, thereby fixing the valve stem 4 and facilitating the disassembly and assembly process of the valve stem 4.

[0029] Furthermore, the rectangular opening 17 on the handle 5 is sleeved on the top end of the valve stem 4, and a nut 18 for tightening the handle 5 is threadedly connected to the valve stem 4. The opening 17 on the valve stem 4 is sleeved into the top end of the valve stem 4, and then the handle 5 is fixed by tightening the nut 18, so that the handle 5 is easy to disassemble and assemble.

[0030] Furthermore, a pair of slots 19 are provided at one end of the handle 5 close to the valve stem 4, and two clamping rods 20 that can enter the slots 19 respectively are fixed on the top of the valve stem guide tube 6. When the handle 5 is in a horizontal position, the clamping rod 20 docks with one of the slots 19, and the ball valve is in an open state at this time. After the handle 5 is rotated 90° counterclockwise, the other clamping rod 20 will dock with the other slot 19, and the ball valve is closed at this time, thereby facilitating operation.

[0031] Working principle: When the first sealing ring 8 is worn by the valve core 3 for a long time, the upper and lower sets of screws 11 are rotated respectively, the upper screw 11 presses the pressure plate 9 downward, and the lower screw 11 pushes the pressure plate 9 upward, so that the first sealing ring 8 is pressed against the valve core 3 again through the two pressure plates 9, thereby improving the sealing effect;

[0032] When the handle 5 is in a horizontal position, the lever 20 docks with one of the slots 19, and the ball valve is now in an open state. After the handle 5 is rotated 90° counterclockwise, the other lever 20 docks with the other slot 19, and the ball valve is now closed, thereby facilitating operation.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A floating ball valve with good sealing effect, comprising a left housing (1) and a right housing (2) which are detachably connected together, a valve core (3), a valve stem (4) and a handle (5), characterized in that: The inner wall of the left housing (1) is provided with a first groove (7), a first sealing ring (8) in contact with the valve core (3) is arranged in the first groove (7), a pair of pressure plates (9) symmetrically distributed up and down and enclosing the first sealing ring (8) are also arranged in the first groove (7), a pair of butt joint pipes (10) are arranged on the outer arc surface of the pressure plate (9), and two groups of threaded tubes symmetrically distributed up and down are arranged on the outer surface of the left housing (1), a screw rod (11) is connected to the inner thread of the threaded tube, and the bottom end of the screw rod (11) is abutted against the butt joint pipe (10).

2. A floating ball valve with good sealing effect according to claim 1, characterized in that: A second groove (12) is provided on a surface where the left shell (1) and the right shell (2) are connected, and a second sealing ring (13) is provided between the two second grooves (12).

3. A floating ball valve with good sealing effect according to claim 1, characterized in that: A plurality of circular holes (14) are provided on a surface where the left housing (1) and the right housing (2) are connected, and bolt assemblies (15) for fixing the left housing (1) and the right housing (2) together are inserted into the circular holes (14).

4. A floating ball valve with good sealing effect according to claim 1, characterized in that: The right housing (2) is provided with a valve stem guide tube (6), the valve stem (4) is located in the valve stem guide tube (6), and the bottom end of the valve stem (4) is inserted into the valve core (3).

5. A floating ball valve with good sealing effect according to claim 4, characterized in that: A sealing sleeve (16) which is tightly sleeved on the valve stem (4) is arranged in the valve stem conduit (6), and a conical portion is provided on the valve stem conduit (6) at a position abutting against the top end of the sealing sleeve (16).

6. A floating ball valve with good sealing effect according to claim 4, characterized in that: The rectangular opening (17) on the handle (5) is sleeved on the top end of the valve stem (4), and a nut (18) for tightening the handle (5) is threadedly connected to the valve stem (4).

7. A floating ball valve with good sealing effect according to claim 6, characterized in that: A pair of clamping grooves (19) are formed at one end of the handle (5) close to the valve stem (4), and two clamping rods (20) capable of respectively entering the clamping grooves (19) are fixed to the top of the valve stem conduit (6).

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