Floating ball valve with double-sealing structure

Abstract

The utility model belongs to the technical field of valves, and discloses a floating ball valve with a double-sealing structure, which comprises a valve body, a mounting seat is mounted at the top of the middle end of the valve body, a valve rod is movably connected in the mounting seat, an O-shaped ball valve positioned in the valve body is fixedly connected to the bottom of the valve rod, and the O-shaped ball valve is arranged in the valve body. A movable assembly is fixedly installed in an inner cavity of the valve body, and a moving assembly is movably connected to the interior of the valve body. Through cooperation of the moving assembly and the movable assembly, the situation that in the multi-frequency closing and opening process of the valve body, the ball valve and the sealing ring are damaged due to impulsive force of water to the ball valve and the sealing ring in the opening-to-closing process, and the sealing effect is reduced is avoided; the water body suddenly cut off in the valve body is buffered in flushing force, so that the damage of the water hammer effect generated by the water body to the valve body and the O-shaped ball valve is reduced, and the situation that the sealing effect of the valve body becomes poor is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a floating ball valve with a double sealing structure. Background Art

[0002] A floating ball valve is a valve composed of a crank arm and a floating ball. It is used to automatically control the liquid level of a water tower or a pool. The ball can produce a certain displacement under the pressure of the medium and press tightly against the sealing surface of the outlet to ensure the sealing of the outlet. The floating ball valve with a double sealing structure is a specially designed valve. Its double sealing structure ensures that the valve can provide reliable sealing performance when closed. However, the existing floating ball valve with a double sealing structure still has disadvantages in actual use:

[0003] During use, when the floating ball valve is closed, the ball will exert pressure on the ball valve and the valve seat under the pressure of the water flow. At the same time, the sealing ring installed on the valve seat or the ball will be squeezed and deformed. Long-term and frequent operation will cause damage to the ball valve as a whole, so it needs to be improved. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a floating ball valve with a double sealing structure to prevent the ball valve from being damaged by the "water hammer effect" generated by the water flow under long-term and high-frequency operation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a floating ball valve with a double sealing structure, comprising a valve body, a mounting seat is installed on the top of the middle end of the valve body, a valve stem is movably connected inside the mounting seat, an O-type ball valve located inside the valve body is fixedly connected to the bottom of the valve stem, a movable component is fixedly installed in the inner cavity of the valve body, a moving component is movably connected inside the valve body, one end of the moving component located inside the valve body is abutted against a resisting component, and a cavity for moving the movable component and the resisting component to move is opened inside the valve body;

[0006] The movable component includes a resisting plate, and one end of the resisting plate close to the mounting seat is in abutting connection with the valve stem; the movable component includes a first connecting shaft and a flap, and the flap is rotatably connected to the valve body through the first connecting shaft; the resisting component includes a second connecting shaft and a push plate, and the push plate is rotatably connected to the valve body through the second connecting shaft.

[0007] Preferably, the abutment plate is elastically connected to the valve body through a spring telescopic tube, and one end of the bottom of the abutment plate close to the valve stem is abuttingly connected to the push plate.

[0008] Preferably, the upper and lower ends of the spring telescopic cylinder are in a "C" shape, and both sides of the contact end of the abutment plate and the valve stem are provided with bevels.

[0009] Preferably, two groups of the moving components are provided, and the two groups of the moving components are symmetrical with respect to the longitudinal center axis of the valve stem.

[0010] Preferably, the flap is elastically connected to the inner wall of the cavity through an arc-shaped spring telescopic tube, and the top surface of the flap is abuttingly connected to the bottom end of the push plate.

[0011] Preferably, the movable components are provided in two groups and are plane-symmetrical about the longitudinal center axis of the valve stem, and each group of the movable components is divided into two and are plane-symmetrical about the transverse center axis of the valve stem.

[0012] Preferably, the cavities are provided with four and all of them are trapezoidal in shape, and the opening positions of the four cavities correspond to the installation positions of the movable component and the interference component;

[0013] Support rods that abut against the abutment plate are installed on both sides of the valve stem, and the support rods are movably connected to the mounting seat.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model prevents the ball valve and the sealing ring from being damaged by the impact of water on the ball valve and the sealing ring during the process of multiple closing and opening of the valve body, thereby reducing the sealing effect. When closing, the valve stem is rotated to release the impact on the abutment plate, and the abutment plate will push the push plate to make the push plate flip over with the second connecting shaft as the axis, and the bottom end of the push plate will downwardly abut the flap to make the flap flip over toward the inner cavity of the valve body close to the end of the spring telescopic cylinder. The water in the inner cavity of the valve body will be blocked by the flipping of the flap, thereby preventing the water from directly punching the O-type ball valve. At the same time, when the abutment plate moves to the side close to the valve stem, the impact pressure of the water suddenly cut off inside the valve body is buffered, thereby reducing the damage to the valve body and the O-type ball valve caused by the "water hammer effect" generated by the water, and reducing the situation that causes the valve body sealing effect to deteriorate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0018] Figure 3 This is a front sectional structural schematic diagram of the utility model;

[0019] Figure 4This is a schematic diagram of the structural matching relationship between the abutment plate and the second connecting shaft of the utility model;

[0020] Figure 5 This is a schematic diagram of the structural coordination relationship between the flap and the push plate of the utility model;

[0021] Figure 6 It is a schematic diagram of the structural matching relationship between the abutment plate and the valve body of the utility model.

[0022] In the figure: 1. valve body; 2. valve stem; 3. mounting seat; 4. O-type ball valve; 5. moving assembly; 51. abutment plate; 52. spring telescopic tube; 6. movable assembly; 61. first connecting shaft; 62. flap; 63. arc spring telescopic tube; 7. abutment assembly; 71. second connecting shaft; 72. push plate; 8. cavity. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figures 1 to 6 As shown, the utility model provides a floating ball valve with a double sealing structure, including a valve body 1, a mounting seat 3 is installed on the top of the middle end of the valve body 1, a valve stem 2 is movably connected inside the mounting seat 3, an O-type ball valve 4 located inside the valve body 1 is fixedly connected to the bottom of the valve stem 2, a movable component 6 is fixedly installed in the inner cavity of the valve body 1, a moving component 5 is movably connected inside the valve body 1, one end of the moving component 5 located inside the valve body 1 is abutted and connected with a resistance component 7, and a cavity 8 for the movable component 6 and the resistance component 7 to move is opened inside the valve body 1;

[0025] The movable component 5 includes a resist plate 51, and one end of the resist plate 51 close to the mounting seat 3 is in contact with the valve stem 2; the movable component 6 includes a first connecting shaft 61 and a flap 62, and the flap 62 is rotatably connected to the valve body 1 through the first connecting shaft 61; the resisting component 7 includes a second connecting shaft 71 and a push plate 72, and the push plate 72 is rotatably connected to the valve body 1 through the second connecting shaft 71.

[0026] like Figure 3 and Figure 4 As shown, the butt plate 51 is elastically connected to the valve body 1 through the spring telescopic tube 52 , and one end of the bottom of the butt plate 51 close to the valve stem 2 is in contact with the push plate 72 .

[0027] By adopting the above scheme: when the valve stem 2 rotates, it will contact the abutment plate 51, so that the end of the abutment plate 51 located inside the valve body 1 moves in the same direction, and the spring telescopic tube 52 is stretched. On the contrary, when the valve stem 2 does not contact the abutment plate 51, the stretched spring telescopic tube 52 will exert elastic force on the abutment plate 51, so that the abutment plate 51 is reset. At the same time, when the abutment plate 51 moves toward the direction of the valve stem 2, the end of the bottom of the abutment plate 51 close to the valve stem 2 will contact the bottom end of the push plate 72, forcing the push plate 72 to rotate around the second connecting shaft 71 as the axis. When the push plate 72 flips, the bottom end of the push plate 72 will contact the flap 62 to flip.

[0028] like Figure 3 As shown, the upper and lower ends of the spring telescopic cylinder 52 are in a "C" shape, and both sides of the contact end of the abutment plate 51 and the valve stem 2 are provided with bevels.

[0029] Adopt the above solution: Combine Figure 3 It can be concluded that when the top of the push plate 51 contacts the valve stem 2, the "C"-shaped shape of the push plate 51 will cause the bottom of the push plate 51 to move in the same direction. The angled design of the contact end between the push plate 51 and the valve stem 2 facilitates the contact effect of the valve stem 2 on the push plate 51.

[0030] like Figure 3 As shown, two groups of moving components 5 are provided, and the two groups of moving components 5 are symmetrical with respect to the longitudinal center axis of the valve stem 2 .

[0031] The above solution is adopted: the design of the two sets of moving components 5 ensures that no matter in which direction the water inside the valve body 1 flows, the moving component 5 can abut against the abutting component 7 to cause the movable component 6 to flip.

[0032] like Figure 4 As shown, the flap 62 is elastically connected to the inner wall of the cavity 8 through an arc-shaped spring telescopic tube 63 , and the top surface of the flap 62 is in contact with the bottom end of the push plate 72 .

[0033] By adopting the above scheme: when the push plate 72 is resisted and flipped by one end of the bottom of the push plate 51, the push plate 72 will simultaneously drive the flap 62 to flip. At this time, the flap 62 will release the sealing effect on the inner wall of the cavity 8, so that the water inside the valve body 1 will enter the interior of the cavity 8.

[0034] like Figure 3 As shown, two groups of movable components 6 are provided, and are plane-symmetrical about the longitudinal center axis of the valve stem 2 , and each group of movable components 6 is divided into two, and are plane-symmetrical about the transverse center axis of the valve stem 2 .

[0035] Adopt the above scheme: For the specific position relationship of the active component 6, refer to Figure 3 ,by Figure 3For example, when the stop plate 51 moves, it can control the movement of the upper and lower movable components 6 located on the same side, and the upper and lower movable components 6 move in opposite directions.

[0036] like Figure 3 and Figure 5 As shown, there are four cavities 8 and the shapes of the cavities are all trapezoidal. The opening positions of the four cavities 8 correspond to the installation positions of the movable component 6 and the abutment component 7.

[0037] Support rods that abut against the abutment plate 51 are installed on both sides of the valve stem 2 , and the support rods are movably connected to the mounting seat 3 .

[0038] Adopt the above scheme: according to Figure 3 and Figure 5 The specific shape of the cavity 8 can be seen, and from Figure 3 It can be seen that the contact area between the cavity 8 and the inner cavity of the valve body 1 is an inclined surface. When the flap 62 flips over to release the sealing effect on the inner cavity of the cavity 8, the design of the inclined surface allows the water to quickly impact the flap 62.

[0039] The working principle and use process of this utility model:

[0040] First, when the valve body 1 needs to be shut down, the valve stem 2 is rotated so that the valve stem 2 drives the supporting rods on both sides thereof to release the contact with the abutment plate 51. The abutment plate 51 is subjected to the elastic force released by the compressed spring telescopic cylinder 52, so that the abutment plate 51 as a whole moves toward the valve stem 2. Initially, the supporting rods on both sides of the valve stem 2 abut the abutment plate 51, so that the abutment plate 51 moves toward the side away from the valve stem 2, and the spring telescopic cylinder 52 is compressed. At this time, the valve stem 2 causes the O-type ball valve 4 to release the sealing effect on the inner cavity of the valve body 1, so that water can flow through the valve body 1 and the O-type ball valve 4.

[0041] Secondly, when the valve stem 2 is rotated so that the O-type ball valve 4 blocks the water in the inner cavity of the valve body 1 and the support rod of the valve stem 2 releases the resistance to the abutment plate 51, the abutment plate 51 will resist the push plate 72 during the movement, so that the push plate 72 will turn over with the second connecting shaft 71 as the axis. At this time, the bottom end of the push plate 72 will resist the flap 62 downward, so that the flap 62 will turn over with the first connecting shaft 61 as the axis. At this time, the arc spring telescopic tube 63 is stretched, and the end of the flap 62 close to the spring telescopic tube 52 turns toward the inner cavity of the valve body 1, and the water in the inner cavity of the valve body 1 will The flipping of the flap 62 blocks the water, preventing the water from directly punching the O-type ball valve 4. At the same time, when the abutment plate 51 moves toward the side close to the valve stem 2, the abutment plate 51 on the same side of the displacement will synchronously squeeze the upper and lower second connecting shafts 71 located on the same side, so that one end of the upper and lower arc-shaped spring telescopic tubes 63 flips toward the inner cavity of the valve body 1 at the same time, buffering the punching pressure of the water that is suddenly cut off inside the valve body 1, reducing the damage of the valve body 1 and the O-type ball valve 4 caused by the "water hammer effect" generated by the water, thereby causing the valve body sealing effect to deteriorate.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floating ball valve with a double sealing structure, comprising a valve body (1), characterized in that: A mounting seat (3) is installed at the top of the middle end of the valve body (1), the mounting seat (3) is movably connected to a valve stem (2) inside, the bottom of the valve stem (2) is fixedly connected to an O-type ball valve (4) located inside the valve body (1), a movable component (6) is fixedly installed in the inner cavity of the valve body (1), a moving component (5) is movably connected inside the valve body (1), one end of the moving component (5) located inside the valve body (1) is abuttingly connected to a resistance component (7), and a cavity (8) is provided inside the valve body (1) for enabling the movable component (6) and the resistance component (7) to move; The movable component (5) includes a resisting plate (51), and one end of the resisting plate (51) close to the mounting seat (3) is in abutting connection with the valve stem (2); the movable component (6) includes a first connecting shaft (61) and a flap (62), and the flap (62) is rotatably connected to the valve body (1) via the first connecting shaft (61); the resisting component (7) includes a second connecting shaft (71) and a push plate (72), and the push plate (72) is rotatably connected to the valve body (1) via the second connecting shaft (71).

2. The floating ball valve with double sealing structure according to claim 1, characterized in that: The abutment plate (51) is elastically connected to the valve body (1) via a spring telescopic cylinder (52), and one end of the bottom of the abutment plate (51) close to the valve stem (2) is in abutment connection with the push plate (72).

3. The floating ball valve with double sealing structure according to claim 2, characterized in that: The upper and lower ends of the spring telescopic cylinder (52) are in a "C" shape, and both sides of the contact end of the abutment plate (51) and the valve stem (2) are provided with bevels.

4. The floating ball valve with double sealing structure according to claim 1, characterized in that: The movable components (5) are provided in two groups, and the two groups of movable components (5) are symmetrical with respect to the longitudinal center axis of the valve stem (2).

5. The floating ball valve with double sealing structure according to claim 1, characterized in that: The flap (62) is elastically connected to the inner wall of the cavity (8) via an arc-shaped spring telescopic tube (63), and the top surface of the flap (62) is in contact with the bottom end of the push plate (72).

6. The floating ball valve with double sealing structure according to claim 5, characterized in that: The movable components (6) are provided in two groups and are symmetrical about the longitudinal center axis of the valve stem (2); each group of the movable components (6) is divided into two and are symmetrical about the transverse center axis of the valve stem (2).

7. The floating ball valve with double sealing structure according to claim 1, characterized in that: The cavities (8) are provided with four and all have trapezoidal shapes. The opening positions of the four cavities (8) correspond to the installation positions of the movable component (6) and the abutment component (7); Support rods that abut against the abutment plate (51) are installed on both sides of the valve stem (2), and the support rods are movably connected to the mounting seat (3).

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