Ball valve

Abstract

The utility model discloses a ball valve which comprises a valve body, a ball body, a mounting cavity formed in the valve body, provided with a mounting opening and used for mounting the ball body, a valve cover detachably mounted at the mounting opening and a valve rod mounted on the valve body, and a detachable linkage assembly forming steering linkage of the ball body and the valve rod is arranged between the ball body and the valve rod. The dismounting operation characteristic of the detachable linkage assembly is located on one side of the axis of the valve rod, the rotating path formed by the dismounting operation characteristic of the detachable linkage assembly along with rotation of the valve rod intersects with the orthographic projection path of the mounting opening, and a detachable limiting assembly for limiting radial movement of the ball body along the valve rod is arranged between the side, opposite to the valve rod, of the ball body and the valve body. The disassembly and assembly operation feature of the detachable limiting assembly is located on one side of the axis of the valve rod, and the disassembly and assembly operation feature position of the detachable limiting assembly intersects with the orthographic projection path of the installation opening. The utility model has the following advantages and effects: the ball body can be conveniently disassembled, assembled and maintained, so that the maintenance workload and the maintenance cost are reduced.

Description

TECHNICAL FIELD

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

[0002] The ball valve is a valve with a ball as the opening and closing member, which is driven by a stem and rotates around the valve axis, and can be used for regulating and controlling fluid. When the through hole on the ball is aligned or offset with the pipeline axis, the valve is opened or closed. The ball valve should be installed horizontally in the pipeline. According to the driving mode, the ball valve is divided into three types: pneumatic ball valve, electric ball valve and manual ball valve. The ball valve mainly consists of a valve body, a ball, a stem and a valve seat.

[0003] The ball valve includes a valve cover and a valve body. The structure of the valve cover and the valve body is mainly divided into two types: up-down installation and left-right installation. To achieve convenient installation of the valve cover and the valve body, a threaded connection structure is usually used. In addition, the installation of the valve stem and the ball is as follows: first, the ball is installed between the valve body and the valve cover, and then the valve stem is installed to form a plug-in cooperation with the ball. When the ball needs to be disassembled and maintained, the ball must be removed after the valve stem is disassembled due to the interference of the position structure of the valve stem, thereby increasing the maintenance workload and maintenance cost of the ball. SUMMARY

[0004] The utility model aims to provide a ball valve which can realize convenient disassembly and maintenance of the ball, thereby reducing the maintenance workload and maintenance cost.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme: a ball valve, comprising a valve body, a ball, an installation cavity formed in the valve body and having an installation port for installing the ball, a valve cover detachably installed in the installation port, and a valve stem installed on the valve body, wherein a detachable linkage assembly is arranged between the ball and the valve stem to form a turning linkage of the ball and the valve stem, the disassembly and assembly operation feature of the detachable linkage assembly is located on one side of the valve stem axis, and the rotation path formed by the turning of the disassembly and assembly operation feature of the detachable linkage assembly and the orthographic projection path of the installation port intersect, a detachable limiting assembly is arranged between the ball and the valve body on the side opposite to the valve stem to limit the radial movement of the ball along the valve stem, and the disassembly and assembly operation feature of the detachable limiting assembly is located on one side of the valve stem axis, and the position of the disassembly and assembly operation feature of the detachable limiting assembly intersects with the orthographic projection path of the installation port.

[0006] By adopting the technical scheme, the detachable linkage assembly cooperates with the detachable limiting assembly to ensure that the valve rod can control the ball and that the ball is stably installed in the installation cavity. When the ball needs to be disassembled and maintained, the valve cover is disassembled, the detachable linkage assembly is rotated by the valve rod, and the disassembly operation feature of the detachable linkage assembly is rotated to the side corresponding to the installation opening. Thus, the two disassembly operation features can complete the disassembly operation of the detachable linkage assembly and the detachable limiting assembly at the installation opening. The ball is conveniently taken out of the installation cavity, and the valve rod does not need to be disassembled, thereby reducing the maintenance workload and maintenance cost.

[0007] Further, the detachable linkage assembly comprises an upper linkage groove arranged at the bottom of the valve rod, a lower linkage groove arranged on the ball and corresponding to the upper linkage groove, a linkage shaft slidingly installed in the lower linkage groove, an upper pressing spring driving the linkage shaft to be synchronously located in the upper linkage groove and the lower linkage groove, and an upper control feature arranged on the linkage shaft.

[0008] By adopting the technical scheme, the linkage shaft is synchronously located in the upper linkage groove and the lower linkage groove under the action of the upper pressing spring, thereby forming a turning linkage between the valve rod and the ball, and the structure is simple and the processing cost is lower.

[0009] Further, the disassembly operation feature of the detachable linkage assembly is a disassembly hole arranged on the peripheral wall of the ball and communicating with the side wall of the lower linkage groove, and the disassembly hole cooperates with the upper control feature to control the linkage shaft to leave the upper linkage groove.

[0010] By adopting the technical scheme, a tool is inserted into the disassembly hole at the installation opening to drive the linkage shaft to leave the upper linkage groove by cooperating with the upper control feature, thereby realizing the disassembly and separation operation.

[0011] Further, the control feature is a control hole extending along the length direction of the disassembly hole, the control hole corresponds to the disassembly hole when the linkage shaft is synchronously located in the upper linkage groove and the lower linkage groove, and a disassembly inclined surface is formed at the bottom of the control hole and extends away from the disassembly hole and gradually inclines toward the side of the valve rod.

[0012] By adopting the technical scheme, a tool is inserted into the disassembly hole at the installation opening, the tool inserted into the disassembly hole abuts against the disassembly inclined surface, the direction of the force is changed under the action of the disassembly inclined surface, and the linkage shaft is driven to move away from the upper linkage groove.

[0013] Further, the detachable limiting assembly comprises an upper limiting groove arranged at the bottom of the ball, a lower limiting groove arranged on the valve body and corresponding to the upper limiting groove, and a limiting column slidingly installed in the upper limiting groove and capable of being inserted into the lower limiting groove, and the length of the limiting column is greater than the depth of the lower limiting groove.

[0014] By adopting the technical scheme, the limiting column is inserted into and located in the upper limiting groove and the lower limiting groove synchronously under the action of gravity, so that the ball is limited in the horizontal direction, and the normal rotation of the ball is not interfered.

[0015] Further, the dismounting operation feature of the detachable limiting assembly is a dismounting stepped groove arranged on the outer circumferential wall of the limiting column, the dismounting stepped groove is arranged in a ring shape around the center of the limiting column, and when the limiting column is inserted into the lower limiting groove, the dismounting stepped groove is located between the upper limiting groove and the lower limiting groove.

[0016] By adopting the technical scheme, the tool is inserted into the dismounting stepped groove at the mounting port, and the limiting column is moved away from the lower limiting groove through the dismounting stepped groove, so that the dismounting and separating operation can be realized.

[0017] Further, the upper limiting groove is provided with a lower abutting spring for driving the limiting column to be inserted into the lower limiting groove.

[0018] By adopting the technical scheme, the accidental displacement of the limiting column is avoided, and the stability of the structure is ensured.

[0019] In summary, the utility model has the following beneficial effects: the utility model can realize convenient dismounting and maintenance of the ball, so that the maintenance workload and maintenance cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of an embodiment;

[0021] Figure 2 It is a structure schematic view of an embodiment; Figure 1 It is an enlarged view of A part in the middle;

[0022] Figure 3 It is an enlarged view of B part in the middle; Figure 1

[0023] Figure 4 It is a local structure schematic view of an embodiment.

[0024] In the drawing: 1, valve body; 2, ball; 3, mounting port; 4, mounting cavity; 5, valve cover; 6, valve rod; 7, detachable linkage assembly; 71, upper linkage groove; 72, lower linkage groove; 73, linkage shaft; 74, upper abutting spring; 75, control hole; 8, detachable limiting assembly; 81, upper limiting groove; 82, lower limiting groove; 83, limiting column; 9, dismounting hole; 10, dismounting inclined surface; 11, dismounting stepped groove; 12, lower abutting spring. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in combination with the drawings.

[0026] Reference Figures 1 to 4 ​A ball valve comprises a valve body 1, a ball 2, a mounting cavity 4 formed in the valve body 1 and having a mounting hole 3 for mounting the ball 2, a valve cover 5 detachably mounted on the mounting hole 3, and a valve stem 6 mounted on the valve body 1, the valve cover 5 being threadedly connected with the valve body 1. A detachable linkage assembly 7 is arranged between the ball 2 and the valve stem 6 to form a turning linkage between the ball 2 and the valve stem 6, the dismounting operation feature of the detachable linkage assembly 7 is located on one side of the axis of the valve stem 6, and the rotation path of the dismounting operation feature of the detachable linkage assembly 7 formed by the rotation of the valve stem 6 intersects with the orthographic projection path of the mounting hole 3. A detachable limiting assembly 8 is arranged between the ball 2 and the valve body 1 on the side opposite to the valve stem 6 to limit the radial movement of the ball 2 along the valve stem 6, the dismounting operation feature of the detachable limiting assembly 8 is located on one side of the axis of the valve stem 6, and the dismounting operation feature of the detachable limiting assembly 8 intersects with the orthographic projection path of the mounting hole 3.

[0027] The detachable linkage assembly 7 comprises an upper linkage groove 71 formed in the bottom of the valve stem 6, a lower linkage groove 72 formed in the ball 2 and corresponding to the upper linkage groove 71, a linkage shaft 73 slidably mounted in the lower linkage groove 72, an upper abutting spring 74 for driving the linkage shaft 73 to be synchronously located in the upper linkage groove 71 and the lower linkage groove 72, and an upper control feature provided on the linkage shaft 73. The upper linkage groove 71 and the lower linkage groove 72 are both hexagonal grooves, the linkage shaft 73 is a hexagonal prism, and the upper abutting spring 74 is mounted in the lower linkage groove 72.

[0028] The dismounting operation feature of the detachable linkage assembly 7 is a dismounting hole 9 formed in the peripheral wall of the ball 2 and communicating with the side wall of the lower linkage groove 72, and the dismounting hole 9 cooperates with the upper control feature to control the linkage shaft 73 to leave the upper linkage groove 71. The control feature is a control hole 75 extending along the length direction of the dismounting hole 9, and the control hole 75 corresponds to the dismounting hole 9 when the linkage shaft 73 is synchronously located in the upper linkage groove 71 and the lower linkage groove 72. A dismounting inclined surface 10 is formed in the bottom of the control hole 75 and extends away from the dismounting hole 9 and gradually inclines toward the side of the valve stem 6.

[0029] The detachable limiting assembly 8 comprises an upper limiting groove 81 formed in the bottom of the ball 2, a lower limiting groove 82 formed in the valve body 1 and corresponding to the upper limiting groove 81, and a limiting column 83 slidably mounted in the upper limiting groove 81 and capable of being inserted into the lower limiting groove 82, the length of the limiting column 83 being greater than the depth of the lower limiting groove 82. The upper limiting groove 81 and the lower limiting groove 82 are both circular grooves, and the limiting column 83 is a circular column coaxially arranged with the linkage shaft 73. The dismounting operation feature of the detachable limiting assembly 8 is a dismounting stepped groove 11 formed in the peripheral wall of the limiting column 83 and arranged in a circular ring shape around the center of the limiting column 83. When the limiting column 83 is inserted into the lower limiting groove 82, the dismounting stepped groove 11 is located between the upper limiting groove 81 and the lower limiting groove 82. A lower abutting spring 12 is arranged in the upper limiting groove 81 to drive the limiting column 83 to be inserted into the lower limiting groove 82.

[0030] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and a modification without creative contribution can be made to the embodiment according to needs by a person skilled in the art after reading the specification, but as long as the modification is within the scope of the claims of the utility model, the utility model is protected by the patent law.

Claims

1. A ball valve, comprising a valve body (1), a ball (2), a mounting cavity (4) formed in the valve body (1) having a mounting port (3) for mounting the ball (2), a valve cover (5) detachably mounted to the mounting port (3), and a valve stem (6) mounted on the valve body (1), characterized in that: A detachable linkage assembly (7) is provided between the ball (2) and the valve stem (6) to form a rotation linkage between the ball (2) and the valve stem (6). The disassembly and assembly operation feature of the detachable linkage assembly (7) is located on one side of the valve stem (6) axis, and the rotation path formed by the disassembly and assembly operation feature of the detachable linkage assembly (7) as the valve stem (6) rotates intersects the orthogonal projection path of the mounting port (3). A detachable limiting assembly (8) is provided between the side of the ball (2) opposite to the valve stem (6) and the valve body (1) to restrict the radial movement of the ball (2) along the valve stem (6). The disassembly and assembly operation feature of the detachable limiting assembly (8) is located on one side of the valve stem (6) axis, and the position of the disassembly and assembly operation feature of the detachable limiting assembly (8) intersects the orthogonal projection path of the mounting port (3).

2. The ball valve according to claim 1, characterized in that: The detachable linkage assembly (7) includes an upper linkage groove (71) disposed at the bottom of the valve stem (6), a lower linkage groove (72) disposed on the ball (2) and corresponding to the upper linkage groove (71), a linkage shaft (73) slidably installed in the lower linkage groove (72), an upper clamping spring (74) that drives the linkage shaft (73) to be synchronously located in the upper linkage groove (71) and the lower linkage groove (72), and an upper control feature disposed on the linkage shaft (73).

3. The ball valve according to claim 2, characterized in that: The disassembly and assembly operation feature of the detachable linkage component (7) is a disassembly and assembly hole (9) provided on the outer peripheral wall of the sphere (2) and connected to the side wall of the lower linkage groove (72). The disassembly and assembly hole (9) is used in conjunction with the upper control feature to control the linkage shaft (73) to leave the upper linkage groove (71).

4. The ball valve according to claim 3, characterized in that: The control feature is a control hole (75) extending along the length of the disassembly hole (9). When the linkage shaft (73) is simultaneously located in the upper linkage groove (71) and the lower linkage groove (72), the control hole (75) corresponds to the disassembly hole (9). The bottom of the control hole (75) forms a disassembly slope (10) that extends away from the disassembly hole (9) and gradually tilts toward the valve stem (6).

5. The ball valve according to claim 1, characterized in that: The detachable limiting assembly (8) includes an upper limit groove (81) disposed at the bottom of the ball (2), a lower limit groove (82) disposed on the valve body (1) and corresponding to the upper limit groove (81), and a limiting post (83) slidably installed in the upper limit groove (81) and capable of being inserted into the lower limit groove (82). The length of the limiting post (83) is greater than the depth of the lower limit groove (82).

6. The ball valve according to claim 5, characterized in that: The disassembly and assembly operation feature of the detachable limiting component (8) is a disassembly and assembly step groove (11) provided on the outer peripheral wall of the limiting post (83). The disassembly and assembly step groove (11) is arranged in a ring around the center of the limiting post (83). When the limiting post (83) is inserted into the lower limiting groove (82), the disassembly and assembly step groove (11) is located between the upper limiting groove (81) and the lower limiting groove (82).

7. The ball valve according to claim 5, characterized in that: The upper limit groove (81) is provided with a lower clamping spring (12) for inserting the driving limit post (83) into the lower limit groove (82).

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