Ball valve stem structure

Abstract

The utility model discloses a ball valve stem structure, including pipeline and fixed installation in pipeline both ends's flange, the inside rotation of pipeline is provided with the valve body, the top of valve body is provided with the insertion slot, the valve rod sets up in the inside of insertion slot, the both sides of insertion slot are provided with the limit slot, the both sides below valve rod fixed mounting limit piece, limit piece and limit slot sliding adaptation, be provided with installation assembly between valve rod and pipeline. The utility model discloses a valve rod is inserted into the inside of insertion slot, and the rotation of valve rod can be through limit piece and limit slot and carry out the rotation to valve body, and the valve rod is limited and fixed through installation assembly, and the connecting ring, filler and first nut in the inside of installation assembly can be limited and locked to valve rod, prevent the emergence of valve rod, thereby realized both can prevent the emergence of valve rod, also can conveniently tear open and overhaul to valve rod.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a ball valve stem structure. Background Technology

[0002] A ball valve is a type of valve that controls the flow of fluid by rotating a ball. Its core component is a ball with a through-hole, which can be rotated 90 degrees to quickly switch between open and closed states. Ball valves are characterized by good sealing performance and low flow resistance, and are suitable for various media such as water, oil, and gas. They are widely used in pipeline systems for shut-off or flow distribution. Modern ball valves employ a combination of PTFE sealing rings and metal hard seals, ensuring both flexibility in low-temperature conditions and durability under high temperature and pressure, with a service life of tens of thousands of opening and closing cycles.

[0003] The valve stem is a crucial transmission component connecting the ball and the operating handle, responsible for transmitting external torque to the ball to achieve rotation. To improve reliability, the valve stem is typically made of stainless steel with a hardened surface treatment to enhance wear resistance. It also features a blowout prevention structure to prevent the valve stem from detaching due to high-pressure media impact. Some high-end ball valves employ an integrated valve stem structure to reduce leakage points and are equipped with packing seals or O-rings to ensure sealing performance over long-term use, making them suitable for harsh environments such as chemical and energy industries.

[0004] Patent document CN208058007U discloses a ball valve stem anti-detachment structure, including a threaded tube, a ball bearing, a bearing housing, a fixing pin, a fixing sleeve, a sealing ring, a gear seat, and a connecting gear. The threaded tube is installed on the lower end face of the handle, the ball bearing is installed inside the bearing housing, and the bearing housing is fixed to the upper end face of the valve body. A fixing pin is provided inside the ball bearing. This design solves the problem of the original ball valve stem easily loosening and falling off after long-term use. The fixing sleeve is installed on the upper end face of the valve body, and a sealing ring is provided on the lower side inside the fixing sleeve. The gear seat is fixed to the upper end face of the ball valve body, and a connecting gear is provided inside the gear seat. The connecting gear is fixed to the lower end face of the valve stem. This design solves the problem of the original ball valve stem not being convenient to install. This utility model has a reasonable structure, is easy to assemble and install, and has good stability.

[0005] In the prior art of the aforementioned patent, the structure limits the valve stem by a fixing pin to prevent the valve stem from coming out. However, the valve stem and the ball valve are fixedly connected by a connecting gear. When the valve stem needs to be repaired or replaced, the valve body and the connecting gear of the valve stem need to be disassembled together, which is a cumbersome process. There is a need for a valve stem structure that can disassemble and assemble the valve stem without disassembling the valve body and can ensure that the valve stem does not have the risk of coming out. Utility Model Content

[0006] Purpose of the utility model: The purpose of this utility model is to provide a ball valve stem structure to solve the above-mentioned shortcomings in the prior art.

[0007] Technical solution: A ball valve stem structure includes a pipe and flanges fixedly installed at both ends of the pipe. A valve body is rotatably installed inside the pipe. A insertion groove is opened at the top of the valve body. The valve stem is disposed inside the insertion groove. Limiting grooves are opened on both sides of the insertion groove. Limiting components are fixedly installed on both sides below the valve stem. The limiting components are slidably adapted to the limiting grooves. An installation assembly is provided between the valve stem and the pipe.

[0008] As a further description of the above technical solution: the installation assembly includes a connector fixedly installed at the top of the pipe. The connector is connected to the insertion groove at the top of the ball valve. The connector also has limiting grooves on both sides that are the same as those on both sides of the insertion groove. The valve stem enters the insertion groove by inserting into the connector. The upper part of the valve stem is rotatably connected to the connector.

[0009] As a further description of the above technical solution: the installation assembly also includes a connecting ring, which is sleeved on the valve stem and rotatably connected to the valve stem. A filler is fixedly installed at the bottom end of the connecting ring. The filler is filled in the limiting grooves on both sides of the connecting member and abuts against the top of the limiting member provided on the valve stem.

[0010] As a further description of the above technical solution: a first nut is provided above the filler, and the first nut is threadedly locked to the valve stem.

[0011] As a further description of the above technical solution: a sealing element is provided between the connecting ring and the connecting member.

[0012] As a further description of the above technical solution: the valve stem has a valve handle at its top end, a protrusion is fixedly provided at the top end of the valve stem, the valve handle has an installation hole and is fitted onto the protrusion, and a second nut is threaded onto the protrusion, the second nut locking the valve handle.

[0013] As a further description of the above technical solution: a locking element is fixedly installed at one end of the valve handle, and two blocking elements are fixedly installed on the connecting ring. When the valve handle drives the valve stem to rotate, the locking element moves between the two blocking elements.

[0014] As a further description of the above technical solution: the length of the limiting member is the same as and fully matches the length of the limiting grooves opened on both sides of the insertion groove, and the filling member is disposed in the space of the remaining limiting grooves except for the limiting grooves on both sides of the insertion groove on the valve body.

[0015] Beneficial effects: By inserting the valve stem into the insertion slot, the rotation of the valve stem can rotate the valve body through the limiting component and the limiting slot. The valve stem is limited and fixed by the mounting assembly. The connecting ring, filler and first nut inside the mounting assembly can limit and lock the valve stem to prevent it from coming out. This achieves both preventing the valve stem from coming out and facilitating the disassembly and maintenance of the valve stem. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a ball valve stem structure proposed in this utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional exploded cross-sectional view of the present invention;

[0019] Figure 4 This is a three-dimensional exploded structural diagram of the present invention;

[0020] Figure 5 This is a three-dimensional cross-sectional view of the ball valve of this utility model when it is closed.

[0021] Legend:

[0022] 1. Pipeline; 2. Flange; 3. Valve body; 4. Connector; 5. Insert groove; 6. Limiting groove; 7. Valve stem; 8. Limiting element; 9. Protrusion; 10. Connecting ring; 11. Filler; 12. First nut; 13. Valve handle; 14. Second nut; 15. Locking element; 16. Blocking element; 17. Sealing element. Detailed Implementation

[0023] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figure 1-5A ball valve stem 7 structure includes a pipe 1 and flanges 2 fixedly installed at both ends of the pipe 1. A valve body 3 is rotatably installed inside the pipe 1. The top of the valve body 3 has a insertion groove 5. The valve stem 7 is disposed inside the insertion groove 5. Limiting grooves 6 are opened on both sides of the insertion groove 5. Limiting components 8 are fixedly installed on both sides below the valve stem 7. The limiting components 8 are slidably adapted to the limiting grooves 6. An installation assembly is provided between the valve stem 7 and the pipe 1. By inserting the valve stem 7 into the insertion groove 5, the rotation of the valve stem 7 can rotate the valve body 3 through the limiting components 8 and the limiting grooves 6. The valve stem 7 is limited and fixed by the installation assembly. The connecting ring 10, the filler 11 and the first nut 12 inside the installation assembly can limit and lock the valve stem 7 to prevent the valve stem 7 from coming out. This achieves both the prevention of valve stem 7 coming out and the convenience of disassembly and maintenance of the valve stem 7.

[0025] As a preferred technical solution of this embodiment, the installation assembly includes a connector 4 fixedly installed at the top of the pipe 1. The connector 4 is connected to the insertion groove 5 at the top of the ball valve. The connector 4 also has limiting grooves 6 on both sides, which are the same as those on both sides of the insertion groove 5. The valve stem 7 enters the interior of the insertion groove 5 by inserting it into the connector 4. The upper part of the valve stem 7 is rotatably connected to the connector 4. The connector 4 is used to overlap and support the installation assembly, so that the connection between the installation assembly and the pipe 1 is tighter and more stable.

[0026] As a preferred technical solution of this embodiment, the installation assembly further includes a connecting ring 10, which is sleeved on the valve stem 7 and rotatably connected to the valve stem 7. A filler 11 is fixedly installed at the bottom end of the connecting ring 10. The filler 11 fills the limiting grooves 6 on both sides of the connecting member 4 and abuts against the top of the limiting member 8 provided on the valve stem 7. Through the installation of the connecting ring 10, the filler 11 below the connecting ring 10 can fill the limiting grooves 6 on the one hand, and lock the limiting member 8 on the valve stem 7 on the other hand, preventing the valve stem 7 from coming out.

[0027] As a preferred technical solution of this embodiment, a first nut 12 is provided above the filler 11, and the first nut 12 is threadedly locked to the valve stem 7; the first nut 12 can lock the filler 11 and the valve stem 7 below the filler 11.

[0028] As a preferred technical solution in this embodiment, a sealing element 17 is provided between the connecting ring 10 and the connecting member 4; the sealing element 17 can increase the sealing performance between the connecting ring 10, the connecting member 4 and the valve stem 7.

[0029] As a preferred embodiment, the valve stem 7 has a valve handle 13 at its top end, and a protrusion 9 is fixedly provided at the top end of the valve stem 7. The valve handle 13 has an installation hole and is fitted onto the protrusion 9. A second nut 14 is threaded onto the protrusion 9 and the second nut 14 locks the valve handle 13. The valve handle 13 is detachably installed at the top end of the valve stem 7 through the second nut 14, and the valve stem 7 can be rotated through the valve handle 13.

[0030] As a preferred technical solution of this embodiment, a locking member 15 is fixedly installed at one end of the valve handle 13, and two blocking members 16 are fixedly installed on the connecting ring 10. When the valve handle 13 drives the valve stem 7 to rotate, the locking member 15 moves between the two blocking members 16; the rotation of the valve stem 7 is locked in a range by the locking member 15, so that the valve stem 7 can only open and close within a range of ninety degrees.

[0031] As a preferred technical solution in this embodiment, the length of the limiting member 8 is the same as and fully adapted to the length of the limiting grooves 6 opened on both sides of the insertion groove 5. The filling member 11 is disposed in the space of the remaining limiting grooves 6 except for the limiting grooves 6 on both sides of the insertion groove 5 on the valve body 3. The limiting member 8 below the valve stem 7 needs to be fully inserted into the limiting groove 6 inside the valve body 3 and cannot be exposed in the limiting groove 6, otherwise jamming will occur during the rotation of the valve body 3.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A ball valve stem structure, comprising a pipe (1) and flanges (2) fixedly installed at both ends of the pipe (1), wherein a valve body (3) is rotatably disposed inside the pipe (1), characterized in that, The valve body (3) has a plug groove (5) at its top end. The valve stem (7) is located inside the plug groove (5). Limiting grooves (6) are provided on both sides of the plug groove (5). Limiting components (8) are fixedly installed on both sides below the valve stem (7). The limiting components (8) are slidably adapted to the limiting grooves (6). An installation assembly is provided between the valve stem (7) and the pipe (1).

2. The ball valve stem structure according to claim 1, characterized in that, The installation assembly includes a connector (4) fixedly installed at the top of the pipe (1). The connector (4) is connected to the ball valve top insertion groove (5). The connector (4) also has limiting grooves (6) on both sides that are the same as those on both sides of the insertion groove (5). The valve stem (7) enters the insertion groove (5) by inserting the connector (4). The upper part of the valve stem (7) is rotatably connected to the connector (4).

3. The ball valve stem structure according to claim 1, characterized in that, The mounting assembly also includes a connecting ring (10), which is sleeved on the valve stem (7) and rotatably connected to the valve stem (7). A filler (11) is fixedly installed at the bottom end of the connecting ring (10). The filler (11) is filled in the limiting grooves (6) on both sides of the connecting member (4) and abuts against the top of the limiting member (8) provided on the valve stem (7).

4. The ball valve stem structure according to claim 3, characterized in that, A first nut (12) is provided above the filler (11), and the first nut (12) is threadedly locked to the valve stem (7).

5. The ball valve stem structure according to claim 3, characterized in that, A sealing element (17) is provided between the connecting ring (10) and the connecting member (4).

6. The ball valve stem structure according to claim 3, characterized in that, The valve stem (7) has a valve handle (13) at its top end. A protrusion (9) is fixedly provided at the top end of the valve stem (7). The valve handle (13) has an installation hole and is fitted onto the protrusion (9). A second nut (14) is threaded onto the protrusion (9) and the second nut (14) locks the valve handle (13).

7. The ball valve stem structure according to claim 6, characterized in that, A locking element (15) is fixedly installed at one end of the valve handle (13), and two blocking elements (16) are fixedly installed on the connecting ring (10). When the valve handle (13) drives the valve stem (7) to rotate, the locking element (15) moves between the two blocking elements (16).

8. The ball valve stem structure according to claim 3, characterized in that, The length of the limiting member (8) is the same as and perfectly matched with the length of the limiting grooves (6) opened on both sides of the insertion groove (5). The filling member (11) is set in the space of the remaining limiting grooves (6) except for the limiting grooves (6) on both sides of the insertion groove (5) on the valve body (3).

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