Flange ball valve

Abstract

The utility model discloses a flange ball valve which comprises a valve body, a valve seat and a ball body which are arranged in the valve body, a valve rod which is installed on the valve body and connected with the ball body, and a handle which is connected with the valve rod, the valve rod is in detachable linkage with the ball body, and the valve seat is in detachable sealing fit with the valve body. A replacement opening is formed in the valve body, the valve seat and the ball can pass through the replacement opening, an opening and closing assembly is arranged on the replacement opening, and a positioning assembly matched with the opening and closing assembly is arranged in the valve body. The positioning assembly has a positioning state and a non-positioning state that the positioning valve seat and the valve body are in sealing fit and the valve seat and the ball body are in sealing fit, and when the opening and closing assembly is in the closed state, the positioning assembly is in the positioning state. The ball valve has the following advantages and effects that the ball body and the valve seat can be conveniently replaced, so that the operation difficulty is reduced, and the operation workload is reduced.

Description

TECHNICAL FIELD

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

[0002] The ball valve is a valve whose opening and closing member is a ball and which is driven by a stem and rotates around the ball valve axis, and can also be used for fluid regulation and control; 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 generally be installed horizontally in the pipeline, and the ball valve is divided into three types according to the driving mode: pneumatic ball valve, electric ball valve and manual ball valve.

[0003] The sealing of the ball valve is mainly achieved by the mutual abutment between the ball and the valve seat, and the hard sealing is formed by the hard friction contact between the ball and the valve seat. In the long-term use process, when the wear between the two is excessive, the valve will leak. In order to save costs, the valve seat and the ball can be replaced separately. However, the existing ball valve needs to be completely disassembled and scattered when replacing the valve seat and the ball, which leads to the replacement and maintenance mode, and the operation is complicated and the workload is large. The above-mentioned problems are improved. SUMMARY

[0004] The utility model discloses a flange ball valve, which can conveniently replace the ball and the valve seat, thereby reducing the operation difficulty and the operation workload.

[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 valve seat and a ball arranged in the valve body, a valve stem installed on the valve body and connected with the ball, and a handle connected with the valve stem, the valve stem and the ball are detachably linked, the valve seat and the valve body are detachably sealed, the valve body is provided with a replacement opening through which the valve seat and the ball pass, the replacement opening is provided with an opening and closing assembly, the valve body is provided with a positioning assembly matched with the opening and closing assembly, the positioning assembly has a positioning state in which the valve seat and the valve body are sealed and the ball and the valve seat are sealed, and a non-positioning state, when the opening and closing assembly is in the closed state, the positioning assembly is in the positioning state.

[0006] By adopting the technical scheme, when the opening and closing assembly is in the closed state, the positioning assembly is in the positioning state, the positioning assembly is arranged to position the sealing fit between the valve seat and the valve body and the sealing fit between the valve seat and the ball, so as to meet the sealing function of the valve and achieve the interception of the medium. When the valve seat and the ball need to be replaced, the opening and closing assembly is opened and the positioning of the positioning assembly is released, so that the valve seat and the ball can be taken out through the replacement opening for replacement operation. This operation mode does not need to disassemble and scatter the ball valve as a whole, so as to realize convenient replacement of the ball and the valve seat, reduce the operation difficulty and reduce the operation workload.

[0007] Further arrangement is that the direction of the replacement opening is parallel to the radial direction of the valve seat, and the valve seat and the ball enter and exit the replacement opening along the radial direction of the valve seat.

[0008] By adopting the technical scheme, this arrangement can realize convenient replacement of the valve seat and the ball and better meet the assembly sealing between the installed parts.

[0009] Further arrangement is that the replacement opening is located on the side of the ball opposite to the valve stem, and the valve seat and the ball enter and exit the replacement opening along the axial direction of the valve stem.

[0010] By adopting the technical scheme, this arrangement better realizes convenient replacement of the valve seat and the ball.

[0011] Further arrangement is that the positioning assembly comprises a fixed positioning strip arranged in the valve body and a movable positioning strip arranged on the opening and closing assembly, and the fixed positioning strip and the movable positioning strip are arranged around the outer periphery of the valve seat and are used to limit the radial movement of the valve seat.

[0012] By adopting the technical scheme, the fixed positioning strip cooperates with the movable positioning strip to limit the radial movement of the valve seat, so as to form the sealing assembly between the valve seat and the ball and achieve the positioning purpose.

[0013] Further arrangement is that the opening and closing assembly comprises a cover for sealing and shielding the replacement opening and a plurality of fasteners connecting the cover and the valve body.

[0014] By adopting the technical scheme, the cover cooperates with the fasteners to realize the opening and closing function of the replacement opening.

[0015] Further arrangement is that when the positioning assembly is in the positioning state, a first sealing ring is arranged between the valve body and the valve seat.

[0016] By adopting the technical scheme, the arrangement of the first sealing ring ensures the sealing between the valve seat and the valve body.

[0017] Further arrangement is that one side of the ball facing the cover is provided with a positioning shaft coaxial with the valve rod, and the cover is provided with a positioning groove for inserting the positioning shaft.

[0018] By adopting the above technical scheme, the positioning shaft cooperates with the positioning groove to further limit the installed ball, so as to improve the assembly accuracy and the reliability of the ball structure.

[0019] Further arrangement is that the handle is fixedly provided with a rotating insertion block, and the valve rod is provided with a rotating insertion groove for inserting the rotating insertion block and constituting a rotating linkage.

[0020] By adopting the above technical scheme, the rotating insertion block cooperates with the rotating insertion groove to realize detachable linkage between the handle and the valve rod, so that the handle can be removed when not in use, thereby avoiding unrelated personnel from operating the ball valve.

[0021] In summary, the utility model has the following beneficial effects: the utility model can realize convenient replacement of the ball and the valve seat, thereby reducing operation difficulty and operation workload. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of an embodiment;

[0023] Figure 2 It is Figure 1 It is an enlarged view of A part in the middle;

[0024] Figure 3 It is a partial structural schematic view of an embodiment.

[0025] In the figure: 1, valve body; 2, valve seat; 3, ball; 4, valve rod; 5, handle; 6, replacement opening; 7, positioning assembly; 71, fixed positioning strip; 72, movable positioning strip; 81, cover; 82, fastener; 9, first sealing ring; 10, positioning shaft; 11, positioning groove; 12, rotating insertion block; 13, rotating insertion groove; 14, second sealing ring. DETAILED DESCRIPTION

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

[0027] Reference Figures 1 to 3The application discloses a flange ball valve, which comprises a valve body 1, a valve seat 2 and a ball 3 arranged in the valve body 1, a valve rod 4 arranged on the valve body 1 and connected with the ball 3, and a handle 5 connected with the valve rod 4. The valve rod 4 is detachably connected with the ball 3, and the valve seat 2 is detachably and sealingly connected with the valve body 1. A replacement opening 6 is arranged on the valve body 1 and used for the valve seat 2 and the ball 3, and an opening and closing assembly is arranged on the replacement opening 6. A positioning assembly 7 is arranged in the valve body 1 and used for cooperating with the opening and closing assembly. The positioning assembly 7 has a positioning state and a non-positioning state, wherein the positioning state is used for positioning the valve seat 2 and the valve body 1 to form a sealing connection and positioning the valve seat 2 and the ball 3 to form a sealing connection, and the non-positioning state is used for not positioning the valve seat 2 and the valve body 1 to form a sealing connection and not positioning the valve seat 2 and the ball 3 to form a sealing connection. When the opening and closing assembly is in a closed state, the positioning assembly 7 is in the positioning state.

[0028] The replacement opening 6 is parallel to the radial direction of the valve seat 2, and the valve seat 2 and the ball 3 are arranged along the radial direction of the valve seat 2 and enter and exit the replacement opening 6. Preferably, the replacement opening 6 is arranged on the side, which is opposite to the valve rod 4, of the ball 3, and the valve seat 2 and the ball 3 are arranged along the axial direction of the valve rod 4 and enter and exit the replacement opening 6. A quadrangular prism is integrally arranged on the end of the valve rod 4, which faces the ball 3, and a quadrangular groove is arranged on the ball 3 and used for inserting the quadrangular prism.

[0029] The opening and closing assembly comprises a cover 81 used for sealing and shielding the replacement opening 6 and a plurality of fasteners 82 used for connecting the cover 81 and the valve body 1. The fasteners 82 are bolts which are screwed through the cover 81 and the valve body 1. A second sealing ring 14 is arranged between the cover 81 and the valve body 1 and surrounds the outer circle of the replacement opening 6.

[0030] The valve seat 2 is provided with two valve seats 2, and the positioning assembly 7 is provided with two groups of positioning assemblies 7 and corresponds to the two valve seats 2. The positioning assembly 7 comprises a fixed positioning strip 71 arranged on the inner wall of the valve body 1 and a movable positioning strip 72 arranged on the cover 81. The fixed positioning strip 71 and the movable positioning strip 72 surround the outer circle of the valve seat 2 and are used for limiting the radial movement of the valve seat 2. The fixed positioning strip 71 and the movable positioning strip 72 are both semicircular strips.

[0031] When the positioning assembly 7 is in the positioning state, a first sealing ring 9 is arranged between the valve body 1 and the valve seat 2 and is fixedly arranged on the valve body 1. A positioning shaft 10 coaxial with the valve rod 4 is integrally arranged on the side of the ball 3, which faces the cover 81, and a positioning groove 11 is arranged on the cover 81 and used for inserting the positioning shaft 10. A rotating insertion block 12 is integrally arranged on the handle 5, and a rotating insertion groove 13 is arranged on the valve rod 4 and used for inserting the rotating insertion block 12 and forming a rotating linkage. The rotating insertion block 12 is a hexagonal prism, and the rotating insertion groove 13 is a hexagonal groove which is matched with the shape of the rotating insertion block 12.

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

Claims

1. A flanged ball valve, comprising a valve body (1), a valve seat (2) disposed within the valve body (1), a ball (3), a valve stem (4) mounted on the valve body (1) and connected to the ball (3), and a handle (5) connected to the valve stem (4), characterized in that: The valve stem (4) and the ball (3) are detachably linked, and the valve seat (2) and the valve body (1) are detachably sealed. The valve body (1) is provided with a replacement port (6) and the replacement port (6) allows the valve seat (2) and the ball (3) to pass through. The replacement port (6) is provided with an opening and closing component. A positioning component (7) is provided inside the valve body (1) to cooperate with the opening and closing component. The positioning component (7) has a positioning state where the valve seat (2) and the valve body (1) form a sealed fit, and the valve seat (2) and the ball (3) form a sealed fit, as well as a non-positioning state. When the opening and closing component is in the closed state, the positioning component (7) is in the positioning state.

2. The flange ball valve according to claim 1, characterized in that: The orientation of the replacement port (6) is parallel to the radial direction of the valve seat (2), and both the valve seat (2) and the ball (3) enter and exit the replacement port (6) along the radial direction of the valve seat (2).

3. The flange ball valve according to claim 2, characterized in that: The replacement port (6) is located on the side of the ball (3) opposite to the valve stem (4), and the valve seat (2) and the ball (3) both enter and exit the replacement port (6) along the axial direction of the valve stem (4).

4. The flange ball valve according to claim 1, characterized in that: The positioning component (7) includes a fixed positioning bar (71) disposed in the valve body (1) and a movable positioning bar (72) disposed in the opening and closing component. The fixed positioning bar (71) and the movable positioning bar (72) surround and limit the valve seat (2) on the outer periphery and are used to restrict the valve seat (2) from moving radially thereon.

5. The flange ball valve according to claim 1, characterized in that: The opening and closing assembly includes a cover (81) that seals and shields the replacement port (6) and a number of fasteners (82) that connect the cover (81) to the valve body (1).

6. The flanged ball valve according to claim 1, characterized in that: When the positioning component (7) is in the positioning state, a first sealing ring (9) is provided between the valve body (1) and the valve seat (2).

7. The flange ball valve according to claim 5, characterized in that: The sphere (3) has a positioning shaft (10) coaxial with the valve stem (4) on the side facing the cover (81), and the cover (81) has a positioning groove (11) for the positioning shaft (10) to be inserted.

8. The flange ball valve according to claim 1, characterized in that: A rotating insert (12) is fixedly provided on the handle (5), and a rotating slot (13) is provided on the valve stem (4) for the rotating insert (12) to be inserted and to form a steering linkage.

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