Flange ball valve

Abstract

The utility model discloses a flange ball valve which comprises a valve body, a ball body arranged in the valve body, a valve rod installed on the valve body and connected with the ball body and a handle, a linkage portion is formed on the valve rod, and a first linkage structure forming steering linkage of the linkage portion and the handle is formed between the linkage portion and the handle. A linkage block is fixedly arranged on the valve rod, a plurality of second linkage structures which enable the linkage block and the handle to surround the valve rod to achieve steering linkage are arranged between the linkage block and the handle, a limiting piece connected with the valve rod is arranged above the handle, and the limiting piece limits the first linkage structure and the second linkage structures to be in a linkage state. The ball valve has the following advantages and effects that concentrated stress at the joint of the handle and the valve rod can be reduced, so that stable opening and closing driving operation of the ball valve is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve, in particular to a flange ball valve. BACKGROUND

[0002] The opening and closing part of the ball valve is driven by the valve rod and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The multi-way ball valve can not only flexibly control the flow, distribution and flow direction switching of the medium on the pipeline, but also can close any channel to connect the other two channels. Ball valves are divided into pneumatic ball valves, electric ball valves and manual ball valves according to the driving mode.

[0003] Due to the corrosion of the medium and the generation of impurities jamming in the assembly gap during long-term use of the ball valve, the rotating resistance of the ball valve is increased, which requires a larger driving force to control the opening and closing rotation of the ball valve after long-term use. The connection between the handle and the valve rod of the existing manual ball is mostly a simple insertion connection, which results in a very limited contact surface between the two. When subjected to a large rotating resistance, concentrated stress is easily formed at the connection position, causing the connection position to slip, which ultimately affects the normal opening and closing operation of the ball valve. SUMMARY

[0004] The utility model aims at providing a flange ball valve which can reduce the concentrated stress at the connection between the handle and the valve rod, thereby realizing stable opening and closing driving operation of the ball valve.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a flange ball valve, comprising a valve body, a ball body arranged in the valve body, a valve rod installed on the valve body and connected to the ball body, and a handle, a linkage part is formed on the valve rod, a first linkage structure is formed between the linkage part and the handle, the first linkage structure constitutes the turning linkage of the linkage part and the handle, a linkage block is fixedly arranged on the valve rod, a plurality of second linkage structures are arranged between the linkage block and the handle, the second linkage structures constitute the turning linkage of the linkage block and the handle around the valve rod, a limiting piece is arranged above the handle and connected to the valve rod, and the limiting piece limits the first linkage structure and the second linkage structure to be in the linkage state.

[0006] By adopting the above technical scheme, the limiting piece limits the first linkage structure and the second linkage structure to be in the linkage state, thereby constituting the turning linkage of the handle and the valve rod. The first linkage structure and the second linkage structure are arranged to increase the connection contact surface at the connection between the handle and the valve rod, so that the force on the handle can be quickly and uniformly transmitted to the valve rod to drive the valve rod to rotate. This avoids concentrated stress at the connection between the two, and realizes more stable opening and closing driving operation of the ball valve.

[0007] Further, the linkage part is polygonal in cross section, the first linkage structure is a first linkage hole formed in the handle, and the first linkage hole is sleeved on the linkage part and is shaped to match the linkage part.

[0008] By adopting the above technical scheme, the first linkage hole is sleeved on the linkage part to form a turning linkage between the handle and the valve rod, and this linkage mode is simple to process, low in cost and high in strength.

[0009] Further, the second linkage structure comprises a linkage column connected to the linkage block and a second linkage hole arranged on the handle and inserted with the linkage column.

[0010] By adopting the above technical scheme, the linkage column passes through the second linkage hole to form a turning linkage between the handle and the valve rod, and this linkage mode is simple to process, low in cost and high in strength.

[0011] Further, the linkage block is formed with a slot for inserting the linkage column, and when the second linkage structure is in the linkage state, the linkage column is located in the slot and the second linkage hole at the same time.

[0012] By adopting the above technical scheme, the turning linkage between the valve rod and the handle is formed by punching the linkage block to match the linkage column and the second linkage hole, and this setting mode is convenient to process and lower in processing cost.

[0013] Further, a sealing packing is arranged between the valve body and the valve rod, a packing gland is arranged above the sealing packing, and a driving member is connected to the packing gland to drive the packing gland to compress the sealing packing.

[0014] By adopting the above technical scheme, the driving member drives the packing gland to compress the sealing packing to realize the sealing between the valve body and the valve rod, so as to achieve better sealing effect.

[0015] Further, the driving member is a pressing spring sleeved on the valve rod, one end of the pressing spring abuts against the linkage block, and the other end of the pressing spring abuts against the packing gland.

[0016] By adopting the above technical scheme, the elastic sealing of the sealing packing is realized by the setting structure, so as to avoid the sealing failure caused by excessive deformation of the sealing packing due to large compression force, and also avoid the phenomenon of insufficient sealing caused by small compression force.

[0017] Further, a V-shaped supporting groove is arranged on the end surface of the sealing packing facing the packing gland, and a supporting ring is arranged in the supporting groove and is extruded by the packing gland and shaped to match the supporting groove.

[0018] Through adoption of the technical scheme, the packing gland exerts sealing force on the sealing packing through the support ring, and the sealing packing can be tightly abutted and sealed between the valve body and the valve stem under the action of the support groove shape and the support ring shape, so that more tight sealing between the valve body and the valve stem is realized.

[0019] Further, the valve body is provided with a valve seat cooperating with the ball to form a seal, one side of the valve seat abutting the ball forms a sealing surface, and the sealing surface is provided as at least two.

[0020] Through adoption of the technical scheme, the multiple sealing surfaces are provided to realize multi-seal of the ball valve, so that better sealing effect is achieved.

[0021] In summary, the utility model has the following beneficial effects: the utility model can reduce the concentrated stress at the connection between the handle and the valve stem, so that stable opening and closing driving operation of the ball valve is realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure schematic view of an embodiment;

[0023] Figure 2 Structure schematic view of an embodiment; Figure 1 Structure schematic view of an embodiment;

[0024] Figure 3 Structure schematic view of an embodiment;

[0025] In the figure: 1, valve body; 2, ball; 3, valve stem; 4, handle; 5, linkage part; 6, linkage block; 7, second linkage structure; 71, linkage column; 72, second linkage hole; 8, limiting piece; 9, first linkage hole; 10, insertion slot; 11, sealing packing; 12, packing gland; 13, driving piece; 14, support groove; 15, support ring; 16, valve seat; 17, sealing surface. DETAILED DESCRIPTION

[0026] The utility model will be further described in detail below in combination with the drawings.

[0027] Reference Figures 1 to 3The utility model provides a flange ball valve, including valve body 1, the ball 2 of setting in valve body 1, install in valve body 1 and the valve stem 3 of connecting ball 2 and handle 4, the integral formation has linkage 5 on valve stem 3, and the first linkage structure that forms the linkage of 5 with handle 4 is formed between linkage 5 and handle 4 both steering linkage. The integral setting has linkage block 6 on valve stem 3, and the plurality of second linkage structure 7 that linkage block 6 with handle 4 is equipped between linkage block 6 and handle 4 and constitutes the steering linkage of around valve stem 3 of both, and the number of second linkage structure 7 is preferably two. The limiting piece 8 that is connected valve stem 3 is equipped above handle 4, and limiting piece 8 limits the linkage state of first linkage structure and second linkage structure 7, and limiting piece 8 is the nut of screw connection with valve stem 3.

[0028] The cross-sectional shape of linkage 5 is polygonal and preferably hexagonal, and the first linkage structure is a first linkage hole 9 formed in handle 4, which is sleeved on linkage 5 and has a shape matching that of linkage 5 and is a hexagonal hole.

[0029] The second linkage structure 7 includes a linkage column 71 connected to the linkage block 6 and a second linkage hole 72 formed in the handle 4 and inserted into the linkage column 71. The linkage block 6 is provided with a slot 10 into which the linkage column 71 is inserted, and when the second linkage structure 7 is in the linkage state, the linkage column 71 is located in the slot 10 and the second linkage hole 72 at the same time.

[0030] A sealing packing 11 is arranged between the valve body 1 and the valve stem 3, and a packing gland 12 is arranged above the sealing packing 11. The packing gland 12 is provided with a driving member 13 for driving the packing gland 12 to press the sealing packing 11. The driving member 13 is a pressing spring sleeved on the valve stem 3, one end of the pressing spring abutting against the linkage block 6 and the other end abutting against the packing gland 12. A V-shaped supporting groove 14 is formed in the end face of the sealing packing 11 facing the packing gland 12, and a supporting ring 15 is arranged in the supporting groove 14 and is pressed by the packing gland 12 and has a shape matching that of the supporting groove 14.

[0031] A valve seat 16 is fixedly arranged in the valve body 1 and cooperates with the ball 2 to form a seal. One face of the valve seat 16 abutting against the ball 2 forms a sealing surface 17, and the sealing surface 17 is provided with at least two sealing surfaces and preferably two sealing surfaces.

[0032] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A flange ball valve comprising a valve body (1), a ball (2) arranged in the valve body (1), a valve stem (3) mounted to the valve body (1) and connected to the ball (2), and a handle (4), characterized in that: The valve stem (3) is formed with a linkage part (5), a first linkage structure is formed between the linkage part (5) and the handle (4) to constitute a turning linkage of the two, a linkage block (6) is fixedly arranged on the valve stem (3), a plurality of second linkage structures (7) are arranged between the linkage block (6) and the handle (4) to constitute a turning linkage of the two around the valve stem (3), a limiting piece (8) is arranged above the handle (4) to connect the valve stem (3), and the limiting piece (8) limits the first linkage structure and the second linkage structure (7) to be in a linkage state.

2. A flanged ball valve according to claim 1, characterized in that: The cross-sectional shape of the linkage part (5) is polygonal, the first linkage structure is a first linkage hole (9) formed in the handle (4), and the first linkage hole (9) is sleeved on the linkage part (5) and has a shape matched with that of the linkage part (5).

3. The flanged ball valve according to claim 1, characterized in that: The second linkage structure (7) comprises a linkage column (71) connected to the linkage block (6) and a second linkage hole (72) arranged on the handle (4) and inserted into the linkage column (71).

4. A flanged ball valve according to claim 3, characterized in that: The linkage block (6) is formed with a slot (10) for inserting the linkage column (71), and when the second linkage structure (7) is in a linkage state, the linkage column (71) is located in the slot (10) and the second linkage hole (72) at the same time.

5. The flanged ball valve according to claim 1, characterized in that: A sealing packing (11) is arranged between the valve body (1) and the valve stem (3), a packing gland (12) is arranged above the sealing packing (11), and a driving member (13) is connected to the packing gland (12) to drive the packing gland (12) to compress the sealing packing (11).

6. A flanged ball valve according to claim 5, characterized in that: The driving member (13) is a compression spring sleeved on the valve stem (3), one end of the compression spring abuts against the linkage block (6), and the other end abuts against the packing gland (12).

7. A flanged ball valve according to claim 5, characterized in that: A V-shaped supporting groove (14) is arranged on the end face of the sealing packing (11) facing the packing gland (12), and a supporting ring (15) is arranged in the supporting groove (14) and is pressed by the packing gland (12) and has a shape matched with that of the supporting groove (14).

8. The flanged ball valve according to claim 1, characterized in that: A valve seat (16) matched with the ball (2) is arranged in the valve body (1), one face of the valve seat (16) abutting against the ball (2) forms a sealing surface (17), and the sealing surface (17) is provided as at least two.

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