Ball valve

Abstract

The utility model discloses a ball valve, and belongs to the technical field of ball valves. The ball valve comprises a ball valve body and a fixing mechanism, the ball valve body comprises a valve shell and a valve rod, the valve rod is rotationally installed in the valve shell, and the top end of the valve rod is located outside the valve shell. A connecting rod is installed at the top end of the valve rod, a handle is arranged on the outer side of the connecting rod in a sliding mode, the fixing mechanism comprises a fixing cover, a base, an inner sleeve and an unlocking device, a cavity is formed in the bottom face of the fixing cover, and the base is installed in the cavity. The connecting rod slides in the inner sleeve, a conical cavity is formed in the base, and the inner sleeve slides in the conical cavity. Three sets of sliding grooves are formed in the positions, close to the bottom face, of the side face of the inner sleeve at equal intervals, and balls slide in the sliding grooves. The balls extrude the interior of the conical cavity, the balls further extrude the connecting rod, and the base and the handle extrude each other. And the unlocking device adsorbs the inner sleeve, and through the use of the fixing structure, a user can conveniently disassemble the valve rod.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ball valve. Background Art

[0002] The closing part of the ball valve is a sphere, which rotates around the center line of the valve body to open and close. Ball valves are widely used in pipelines, mainly for cutting off, distributing and changing the flow direction of the medium.

[0003] Chinese patent CN205841837U discloses a ball valve with a quickly replaceable handle, which includes a valve seat and a sphere disposed in the valve seat, a valve stem connected to the top of the sphere, a handle disposed at the top of the valve stem, the handle being fixed to the end of the valve stem by a nut, and the valve stem can be driven to rotate by turning the handle.

[0004] However, when the handle on the ball valve is broken, the nut needs to be loosened and the handle needs to be replaced. Since the working position of the ball valve is relatively humid, the nut often rusts, and the process of loosening the nut is very laborious, making the process of replacing the handle very inconvenient, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a ball valve to solve the problems raised in the above background technology.

[0006] In view of the above problems, the technical solution proposed by the utility model is:

[0007] A ball valve comprises a ball valve body and a fixing mechanism, wherein the ball valve body comprises a valve shell and a valve stem, the valve stem is rotatably mounted inside the valve shell, and the top end of the valve stem is located outside the valve shell, a connecting rod is mounted at the top center of the valve stem, a handle is slidably mounted on the outside of the connecting rod, the fixing mechanism comprises a fixing cover, a base, an inner sleeve, and an unlocker, the bottom surface of the fixing cover comprises a cavity, the base is mounted in the cavity, the connecting rod slides in the inner sleeve, the interior of the base comprises a conical cavity, the inner sleeve slides inside the conical cavity, three groups of slide grooves are equidistantly mounted on the side surface of the inner sleeve near the bottom surface, and balls are slid inside the slide grooves, the balls are squeezed against the interior of the conical cavity, the balls are also squeezed against the connecting rod, the base is squeezed against the handle, and the unlocker adsorbs the inner sleeve.

[0008] The beneficial effect of adopting the above further scheme is that the sliding connecting rod is squeezed by three groups of balls, and when the fixed cover is pulled upward, the friction between the balls and the connecting rod and the action of gravity make the balls and the inner sleeve move downward together with the connecting rod. Because the bottom radius of the conical cavity is smaller than its bottom radius, the three groups of balls that move downward will move into the inner sleeve due to the squeezing of the wall of the conical cavity, thereby increasing the squeezing force on the connecting rod, making it impossible for the fixed cover to be pulled upward, thereby completing the fixation of the handle; the unlocker is placed on the top of the fixed cover, and the inner sleeve will be adsorbed and moved upward. Because the bottom radius of the conical cavity is smaller than its bottom radius, the three groups of balls have the ability to move outward. At this time, the space between the three groups of balls will gradually become larger than the diameter of the connecting rod, and the connecting rod can be taken out.

[0009] Furthermore, a first through hole connected to the conical cavity is provided at the bottom of the base, a cylindrical sliding cavity connected to the three groups of sliding grooves is provided inside the inner sleeve, a second through hole connected to the sliding cavity is provided at the bottom of the inner sleeve, and the connecting rod passes through the first through hole, the second through hole and slides into the sliding cavity.

[0010] Furthermore, the diameter of the connecting rod, the diameter of the first through hole, and the diameter of the second through hole are equal, the diameter of the first through hole is smaller than the bottom diameter of the tapered cavity, the diameter of the second through hole is smaller than the diameter of the sliding cavity, and the diameter of the ball is larger than the diameter of the sliding cavity.

[0011] The beneficial effect of adopting the above further scheme is that, by limiting the diameter of the connecting rod, the diameter of the first through hole, the diameter of the second through hole, the diameter of the sliding cavity, the bottom diameter of the tapered cavity, and the size of the ball, the fixing mechanism can prevent the connecting rod from shaking after it slides into the sliding cavity. At the same time, after the connecting rod slides into the sliding cavity, the three groups of balls can squeeze the connecting rod, and after the inner sleeve moves up, the space between the three groups of balls can be larger than the diameter of the connecting rod. Finally, when the fixing mechanism is not in use, the balls will move into the sliding cavity. After the balls move to avoid sticking to the sliding cavity, part of the balls are still located outside the inner sleeve, thereby preventing the balls from completely sliding into the sliding cavity.

[0012] Furthermore, a spring is connected between the top of the inner sleeve and the inner top of the fixed cover, a magnetic metal sheet is also installed on the top of the inner sleeve, and the unlocker includes a top shell, a magnet is installed on the bottom of the top shell, and the magnet attracts the magnetic metal sheet.

[0013] The beneficial effect of adopting the above further solution is that the inner sleeve is moved upward by using a magnet to absorb the magnetic metal sheet, and after the unlocker is removed, the inner sleeve is pressed by a spring to reset it.

[0014] Furthermore, a pair of limit blocks are installed on the outer side of the connecting rod, a sliding hole is provided on the top of the handle, and a pair of limit grooves are provided on the side of the sliding hole. The connecting rod slides in the sliding hole, and the limit blocks slide in the limit grooves.

[0015] The beneficial effect of adopting the above further solution is that the limit block and the limit groove are used to enable the handle to drive the connecting rod to rotate.

[0016] Furthermore, the ball valve body also includes a valve core, which is rotatably installed inside the valve housing and controls the flow of fluid, and the bottom end of the valve stem is connected to the valve core.

[0017] Furthermore, flanges are connected to both ends of the valve housing.

[0018] The beneficial effect of adopting the above further scheme is that flanges are used to install pipelines on both ends of the ball valve body, and the valve core is hollow. When the ball hole is consistent with the flow direction, the ball valve body is open, and when they are inconsistent, the ball valve body is closed, and the rotation of the valve core is controlled by the valve stem, and the handle controls the rotation of the valve stem.

[0019] Compared with the prior art, the beneficial effect of the utility model is that the ball valve fixes the handle to the top of the valve housing through a fixing mechanism, and connects the handle to the valve stem, thereby replacing the conventional ball valve method of using a nut to fix the handle, and using an unlocker to separate the connecting rod and the fixing mechanism to remove the handle. Since no nut is used for fixing, the problem of the handle being difficult to replace due to rust of the nut will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a ball valve disclosed in an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of a first explosion structure of a ball valve disclosed in an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure of structure A in the middle;

[0023] Figure 4 This is a schematic diagram of a second explosion structure of a ball valve disclosed in an embodiment of the utility model;

[0024] Figure 5 The cross-sectional structure diagram of the ball valve disclosed in the embodiment of the utility model.

[0025] In the figure: 100, ball valve body; 1001, valve housing; 1002, handle; 1003, valve stem; 1004, connecting rod; 1005, limit block; 1006, slide hole; 1007, limit groove; 200, fixing mechanism; 2001, base; 2002, inner sleeve; 2003, slide groove; 2004, ball; 2005, spring; 2006, fixing cover; 2007, top shell; 2008, magnet; 2009, tapered cavity; 2010, first through hole. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1 - Figure 5 The utility model provides a technical solution: a ball valve, the ball valve body 100 includes a valve shell 1001 and a valve stem 1003, the valve stem 1003 is rotatably installed inside the valve shell 1001, and the top end of the valve stem 1003 is located outside the valve shell 1001, a connecting rod 1004 is installed at the top center of the valve stem 1003, and a handle 1002 is slidably provided on the outer side of the connecting rod 1004.

[0028] The fixing mechanism 200 includes a fixing cover 2006, a base 2001, an inner sleeve 2002, and an unlocker. The bottom surface of the fixing cover 2006 has a cavity, the base 2001 is installed in the cavity, the connecting rod 1004 slides in the inner sleeve 2002, the interior of the base 2001 has a conical cavity 2009, the inner sleeve 2002 slides inside the conical cavity 2009, and the side of the inner sleeve 2002 is equidistantly provided with three groups of slide grooves 2003 near the bottom surface, and balls 2004 slide inside the slide grooves 2003, the balls 2004 are squeezed with the inside of the conical cavity 2009, the balls 2004 are also squeezed with the connecting rod 1004, the base 2001 and the handle 1002 are squeezed, and the connecting rod 1004 that slides in is squeezed by the three groups of balls 2004.

[0029] When the fixed cover 2006 is pulled upward, due to the friction between the balls 2004 and the connecting rod 1004 and the action of gravity, the balls 2004 and the inner sleeve 2002 move downward together with the connecting rod 1004. Since the bottom radius of the conical cavity 2009 is smaller than its bottom radius, the three groups of balls 2004 that move downward will move into the inner sleeve 2002 due to the squeezing of the wall of the conical cavity 2009, thereby increasing the squeezing force on the connecting rod 1004, making it impossible for the fixed cover 2006 to be pulled upward, thereby completing the fixation of the handle 1002.

[0030] 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.

[0031] See also Figure 1 - Figure 5 The utility model provides a technical solution: a ball valve includes a spring 2005 connected between the top of an inner sleeve 2002 and the inner top of a fixed cover 2006, and a magnetic metal sheet is installed on the top of the inner sleeve 2002. The unlocker includes a top shell 2007, and a magnet 2008 is installed at the bottom of the top shell 2007, and the magnet 2008 absorbs the magnetic metal sheet.

[0032] Place the unlocker on the top of the fixed cover 2006, and use the magnet 2008 to absorb the magnetic metal sheet to move the inner sleeve 2002 upward. Because the bottom radius of the conical cavity 2009 is smaller than its bottom radius, the three groups of balls 2004 have the ability to move outward. At this time, the space between the three groups of balls 2004 will gradually become larger than the diameter of the connecting rod 1004, and the connecting rod 1004 can be taken out. After the unlocker is removed, use the spring 2005 to press the inner sleeve 2002 to reset it.

[0033] 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.

[0034] See also Figure 1 - Figure 5The utility model provides a technical solution: a pair of limit blocks 1005 are installed on the outside of a ball valve connecting rod 1004, a sliding hole 1006 is provided on the top of the handle 1002, and a pair of limit grooves 1007 are provided on the side of the sliding hole 1006. The connecting rod 1004 slides in the sliding hole 1006, and the limit block 1005 slides in the limit groove 1007. The limit block 1005 and the limit groove 1007 are used to make the handle 1002 drive the connecting rod 1004 to rotate.

[0035] The ball valve body 100 also includes a valve core, which is rotatably mounted inside the valve housing 1001 and controls the flow of fluid. The bottom end of the valve stem 1003 is connected to the valve core. Flanges are connected to both ends of the valve housing 1001, and the flanges are used to mount pipelines on both ends of the ball valve body 100. The valve core is hollow. When the valve core hole is consistent with the flow direction, the ball valve body 100 is open. When they are inconsistent, the ball valve body 100 is closed, and the rotation of the valve core is controlled by the valve stem 1003, and the handle 1002 controls the rotation of the valve stem 1003.

[0036] Specifically, the working principle of the ball valve is as follows: when in use, flanges are used to install pipes on both ends of the ball valve body 100, the handle 1002 is installed on the outside of the connecting rod 1004, and the fixing mechanism 200 is covered on the top of the connecting rod 1004. The sliding connecting rod 1004 is squeezed by three groups of balls 2004, and when the fixing cover 2006 is pulled upward, the friction between the balls 2004 and the connecting rod 1004 and the gravity make the balls 2004 and the inner sleeve 2002 move downward together with the connecting rod 1004. Because the bottom radius of the tapered cavity 2009 is smaller than its bottom radius, the three groups of balls 2004 that move downward will move into the inner sleeve 2002 due to the squeezing of the wall of the tapered cavity 2009, thereby increasing the squeezing force on the connecting rod 1004, so that the fixing cover 2006 cannot be pulled upward, and the handle 1002 is fixed.

[0037] The valve core is hollow. When the valve core hole is consistent with the flow direction, the ball valve body 100 is open. When they are inconsistent, the ball valve body 100 is closed. The rotation of the valve core is controlled by the valve stem 1003, and the handle 1002 controls the rotation of the valve stem 1003.

Claims

1. A ball valve, characterized in that: The invention comprises a ball valve body (100) and a fixing mechanism (200), wherein the ball valve body (100) comprises a valve housing (1001) and a valve stem (1003), wherein the valve stem (1003) is rotatably mounted inside the valve housing (1001), and the top end of the valve stem (1003) is located outside the valve housing (1001), a connecting rod (1004) is mounted at the top center of the valve stem (1003), and a handle (1002) is slidably disposed on the outer side of the connecting rod (1004), and the fixing mechanism (200) comprises a fixing cover (2006), a base (2001), an inner sleeve (2002), and an unlocker, wherein the bottom surface of the fixing cover (2006) has a cavity, and the base (2001) is mounted on the fixing cover. In the cavity, the connecting rod (1004) slides in the inner sleeve (2002), the base (2001) has a conical cavity (2009) inside, the inner sleeve (2002) slides inside the conical cavity (2009), the side of the inner sleeve (2002) is provided with three groups of slide grooves (2003) at equal distances near the bottom surface, and the inside of the slide grooves (2003) slides with balls (2004), the balls (2004) and the inside of the conical cavity (2009) are pressed against each other, the balls (2004) are also pressed against the connecting rod (1004), the base (2001) and the handle (1002) are pressed against each other, and the unlocker adsorbs the inner sleeve (2002).

2. A ball valve according to claim 1, characterized in that: The bottom of the base (2001) is provided with a first through hole (2010) connected to the conical cavity (2009); the interior of the inner sleeve (2002) is provided with a cylindrical sliding cavity connected to the three groups of sliding grooves (2003); the bottom of the inner sleeve (2002) is provided with a second through hole connected to the sliding cavity; the connecting rod (1004) passes through the first through hole (2010), the second through hole and slides into the sliding cavity.

3. A ball valve according to claim 2, characterized in that: The diameters of the connecting rod (1004), the first through hole (2010), and the second through hole are equal; the diameter of the first through hole (2010) is smaller than the bottom diameter of the tapered cavity (2009); the diameter of the second through hole is smaller than the diameter of the sliding cavity; and the diameter of the ball (2004) is larger than the diameter of the sliding cavity.

4. A ball valve according to claim 1, characterized in that: A spring (2005) is connected between the top of the inner sleeve (2002) and the inner top of the fixed cover (2006), a magnetic metal sheet is also installed on the top of the inner sleeve (2002), and the unlocker includes a top shell (2007), a magnet (2008) is installed on the bottom of the top shell (2007), and the magnet (2008) attracts the magnetic metal sheet.

5. A ball valve according to claim 1, characterized in that: A pair of limit blocks (1005) are installed on the outer side of the connecting rod (1004); a sliding hole (1006) is provided on the top of the handle (1002); a pair of limit grooves (1007) are provided on the side of the sliding hole (1006); the connecting rod (1004) slides in the sliding hole (1006); and the limit blocks (1005) slide in the limit grooves (1007).

6. A ball valve according to claim 1, characterized in that: The ball valve body (100) further comprises a valve core, which is rotatably mounted inside the valve housing (1001) and controls the flow of fluid, and the bottom end of the valve stem (1003) is connected to the valve core.

7. A ball valve according to claim 1, characterized in that: Both ends of the valve housing (1001) are connected with flanges.

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