A top-mounted ball valve stem

Abstract

This application relates to a top-mounted ball valve stem, comprising an assembly seat for mounting on a valve body, a rotating rod threaded onto the assembly seat, and a handle on the rotating rod; a pin is movably mounted on the handle, and a pin hole is provided on the assembly seat, the pin hole being located on the rotation path of the pin; a first spring is sleeved on the pin, one end of the first spring abutting against the pin, and the other end of the first spring abutting against the handle; the first spring is used to push the pin into the pin hole; the direction in which the pin is inserted into the pin hole is perpendicular to the rotation direction of the handle; an operating lever is rotatably mounted on the handle, one end of the pin being limited on the operating lever, and the operating lever is used to move the pin away from the pin hole. This application effectively reduces the probability of misoperation and further improves the safety of use.

Description

Technical Field

[0001] This application relates to the technical field of ball valves, and in particular to a top-loading ball valve stem. Background Technology

[0002] Currently, top-entry ball valves are a specially designed type of ball valve. Their main feature is that internal components can be maintained and replaced through the top without disassembling the entire valve from the piping system. This design is extremely useful in many industrial applications, especially in high-pressure, high-temperature, or highly corrosive environments, as it reduces maintenance time and costs and allows for servicing without interrupting pipeline operation.

[0003] In a top-entry ball valve, the stem connects the handle (or actuator) to the ball, transmitting rotational motion to move the ball between the open and closed positions. The stem design should also consider ease of operation and safety, ensuring operators can easily open and close the valve. The stem is primarily threaded to the valve body. For ease of operation, a handle is often provided on the stem, allowing the operator to rotate it. While the handle facilitates opening and closing, an exposed handle, if bumped or knocked, can directly rotate the stem. Such misoperation can alter the valve's state, creating a safety hazard. Utility Model Content

[0004] This application provides a top-mounted ball valve stem that can achieve self-locking, effectively reducing the probability of misoperation and further improving safety.

[0005] The technical solution for the stem of a top-loading ball valve provided in this application is as follows:

[0006] A top-mounted ball valve stem includes an assembly seat for mounting on a valve body. A rotating rod is threaded onto the assembly seat, and a handle is provided on the rotating rod. A pin is movably mounted on the handle, and a pin hole is provided on the assembly seat, the pin hole being located on the rotation path of the pin. A first spring is sleeved on the pin, one end of the first spring abutting against the pin, and the other end of the first spring abutting against the handle. The first spring is used to push the pin into the pin hole. The direction in which the pin is inserted into the pin hole is perpendicular to the rotation direction of the handle. An operating lever is rotatably mounted on the handle, one end of the pin being limited on the operating lever, the operating lever being used to move the pin away from the pin hole.

[0007] Preferably, the operating rod has a through hole, the pin is inserted into the through hole, and the operating rod is movably connected to the pin through the through hole.

[0008] Preferably, a receiving seat is provided on the side wall of the handle away from the operating lever, the pin is movably inserted into the receiving seat, and the first spring is limited within the receiving seat.

[0009] Preferably, the operating lever is further provided with a second spring, and the pin and the second spring are respectively located on both sides of the operating lever's rotation axis; one end of the second spring abuts against the operating lever, and the other end of the second spring abuts against the handle; the second spring is used to push the operating lever to rotate away from the handle.

[0010] Preferably, the operating lever is provided with a limiting plate located outside the second spring, and the limiting plate is integrally formed with a limiting groove facing the bottom of the handle, and the bottom of the handle is inserted into the corresponding limiting groove.

[0011] Preferably, the top of the rotating rod is coaxially threaded with a fastening bolt, the handle is sleeved on the top of the rotating rod, and the fastening bolt tightens and fixes the handle to the rotating rod; the top of the handle is threaded with a sealing cap, and the sealing cap covers the outside of the fastening bolt.

[0012] Preferably, a positioning plate is also fitted on the rotating rod, and the positioning plate rotates synchronously with the rotating rod; a positioning block is provided on the positioning plate, and a positioning seat located on the rotation path of the positioning block is integrally formed on the assembly base.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. Once the lever is fully rotated, insert the pin into the pin hole. The interlocking of the pin and the pin hole restricts the rotation of the handle, thus locking the lever. To release the pin from the handle, press one end of the operating lever towards the handle. The other end of the operating lever will then lift the pin away from the pin hole until it is completely disengaged, releasing the pin from the handle. The locking and unlocking process is quick and easy, achieving self-locking, effectively reducing the probability of misoperation, and further improving safety.

[0015] 2. The first spring ensures the stability and reliability of the pin insertion into the pin hole; the second spring is used to realize the rapid reset of the operating lever, thereby ensuring the speed of the self-locking action and guaranteeing the self-locking effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the embodiment of this application installed on the valve body;

[0017] Figure 2 yes Figure 1 A schematic diagram of a partial structural explosion;

[0018] Figure 3 yes Figure 2 A schematic diagram of a partial structural explosion;

[0019] Figure 4 This is an exploded view of a portion of the control lever's structure.

[0020] Explanation of reference numerals in the attached drawings: 1. Assembly base; 10. Pin hole; 11. Positioning base; 2. Rotary rod; 3. Rotary handle; 30. Receiving base; 4. Pin component; 40. First spring; 5. Operating rod; 50. Movable hole; 51. Limiting plate; 52. Limiting groove; 6. Second spring; 7. Fastening bolt; 8. Sealing cover; 9. Positioning plate; 90. Positioning block. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the accompanying drawings.

[0022] This application discloses a top-mounted ball valve stem, such as... Figure 1 , Figure 2 As shown, it includes an assembly base 1 for fixed installation on the valve body, and a rotating rod 2 for controlling the rotation of a ball inside the valve body is threadedly connected to the assembly base 1. A handle 3 is detachably installed on the top of the rotating rod 2.

[0023] Reference Figure 2 , Figure 3 The top of the rotating rod 2 is coaxially threaded with a fastening bolt 7. One end of the handle 3 is fitted onto the top of the rotating rod 2, and the fastening bolt 7 tightens and fixes the handle 3 onto the rotating rod 2. The top of the handle 3 is threaded with a sealing cap 8, which is coaxially arranged with the rotating rod 2, and the sealing cap 8 covers the outside of the fastening bolt 7.

[0024] like Figure 2 , Figure 3 As shown, a positioning plate 9 is also fitted onto the rotating rod 2, located below the handle 3. The handle 3 presses the positioning plate 9 downward onto the upper surface of the assembly base 1, and the positioning plate 9 rotates synchronously with the rotating rod 2. A positioning block 90 is integrally formed on the positioning plate 9, and positioning seats 11 are integrally formed on both sides of the positioning plate 9. Both positioning seats 11 are located on the rotation path of the positioning block 90. ​​When the handle 3 drives the rotating rod 2 to rotate, the positioning block 90 will rotate synchronously with the rotating rod 2 until the positioning block 90 contacts one of the positioning seats 11. At this time, the flow channel inside the valve body will be in a fully open or fully closed state. The rotation angle of the rotating rod 2 is limited by the positioning block 90 and the positioning seat 11.

[0025] like Figure 3 , Figure 4As shown, a pin 4 is provided on the handle 3, and the pin 4 is movably disposed on the handle 3 along the length direction of the rotating rod 2. Two pin holes 10 are provided on the assembly base 1, both located on the rotation path of the pin 4. When the pin 4 rotates with the handle 3 to be directly opposite the pin hole 10, by inserting the pin 4 into the pin hole 10, the rotation of the handle 3 and the rotating rod 2 is restricted through the mutual insertion and engagement of the pin 4 and the pin hole 10, thus achieving self-locking of the rotating rod 2.

[0026] like Figure 3 , Figure 4 As shown, an operating lever 5 is rotatably mounted above the handle 3. The rotation axis of the operating lever 5 is perpendicular to the direction in which the pin 4 is inserted into the pin hole 10. A movable hole 50 extends through the end of the operating lever 5 near the rotating rod 2, and the length of the movable hole 50 extends along the length of the operating lever 5. The upper end of the pin 4 passes through and is confined within the movable hole 50, and the operating lever 5 is movably connected to the pin 4 through the movable hole 50.

[0027] like Figure 3 , Figure 4 As shown, a receiving seat 30 is integrally formed on the side wall of the handle 3 away from the operating lever 5. The pin 4 is movably inserted into the receiving seat 30. A first spring 40 is also provided in the receiving seat 30, sleeved on the outside of the pin 4, and the first spring 40 is limited within the receiving seat 30. The upper end of the pin 4 is movably inserted into the movable hole 50, and the lower end of the pin 4 protrudes from the bottom of the receiving seat 30 to the outside of the handle 3. The upper end of the first spring 40 abuts against the bottom side wall of the handle 3, and the lower end of the first spring 40 abuts against the outer side wall of the pin 4. The first spring 40 is used to push the pin 4 to move away from the operating lever 5. When the lower end of the pin 4 is inserted into the pin hole 10, the first spring 40 is used to ensure that the pin 4 is tightly inserted into the pin hole 10. The direction in which the pin 4 is inserted into the pin hole 10 is perpendicular to the rotation direction of the handle 3.

[0028] like Figure 3 , Figure 4 As shown, the operating lever 5 is used to lift the pin 4 away from the pin hole 10. A second spring 6 is provided between the operating lever 5 and the handle 3. The pin 4 and the second spring 6 are located on opposite sides of the rotating shaft of the operating lever 5. The upper end of the second spring 6 abuts against the bottom wall of the operating lever 5, and the lower end of the second spring 6 abuts against the upper surface of the handle 3. The second spring 6 is used to push the operating lever 5 to rotate away from the handle 3. At this time, the pin 4 located at the other end of the operating lever 5 can be inserted into the pin hole 10.

[0029] like Figure 3 , Figure 4As shown, a limiting plate 51 is fixedly installed on the operating lever 5, located outside the second spring 6. The bottom of the limiting plate 51 is integrally formed with a limiting groove 52 facing the bottom of the handle 3. The bottom of the handle 3 is inserted into the corresponding limiting groove 52. The limiting plate 51 can hide the second spring 6, thereby protecting the second spring 6, reducing the adverse effects of the external environment on the second spring 6, and extending the service life of the second spring 6.

[0030] The implementation principle is as follows: When the rotating rod 2 is rotated to its position, the pin 4 is inserted into the pin hole 10. The interlocking of the pin 4 and the pin hole 10 restricts the rotation of the handle 3, thus locking the rotating rod 2. When it is necessary to release the pin 4 from the handle 3, the end of the operating lever 5 away from the rotating rod 2 is pressed down towards the handle 3. At this time, the other end of the operating lever 5 will lift the pin 4 away from the pin hole 10 until the pin 4 is completely disengaged from the pin hole 10, thus releasing the pin 4 from the handle 3. The locking and unlocking process is completed in one step, convenient and quick, achieving self-locking, effectively reducing the probability of misoperation, and further improving safety. The first spring 40 ensures the stability and reliability of the pin 4 inserted into the pin hole 10. The second spring 6 is used to quickly reset the operating lever 5, thus ensuring the speed of the self-locking action and guaranteeing the self-locking effect.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A top-mounted ball valve stem, comprising an assembly seat (1) for mounting on a valve body, wherein a rotating rod (2) is threadedly connected to the assembly seat (1), and a handle (3) is provided on the rotating rod (2); characterized in that: A pin (4) is movably disposed on the handle (3), and a pin hole (10) is provided on the assembly base (1). The pin hole (10) is located on the rotation path of the pin (4). A first spring (40) is sleeved on the pin (4). One end of the first spring (40) abuts against the pin (4), and the other end of the first spring (40) abuts against the handle (3). The first spring (40) is used to push the pin (4) into the pin hole (10). The direction in which the pin (4) is inserted into the pin hole (10) is perpendicular to the rotation direction of the handle (3). An operating rod (5) is rotatably disposed on the handle (3). One end of the pin (4) is limited on the operating rod (5). The operating rod (5) is used to drive the pin (4) to move away from the pin hole (10).

2. The valve stem of the top-mounted ball valve according to claim 1, characterized in that: The operating lever (5) has a through hole (50), and the pin (4) is inserted into the through hole (50). The operating lever (5) is movably connected to the pin (4) through the through hole (50).

3. The stem of the top-mounted ball valve according to claim 2, characterized in that: The handle (3) is provided with a receiving seat (30) on the side wall away from the operating rod (5), the pin (4) is movably inserted into the receiving seat (30), and the first spring (40) is limited in the receiving seat (30).

4. The stem of the top-mounted ball valve according to claim 3, characterized in that: The operating lever (5) is also provided with a second spring (6), and the pin (4) and the second spring (6) are located on both sides of the rotating shaft of the operating lever (5); one end of the second spring (6) abuts against the operating lever (5), and the other end of the second spring (6) abuts against the handle (3); the second spring (6) is used to push the operating lever (5) to rotate away from the handle (3).

5. The stem of the top-mounted ball valve according to claim 4, characterized in that: The operating lever (5) is provided with a limiting plate (51) located outside the second spring (6). The limiting plate (51) is integrally formed with a limiting groove (52) facing the bottom of the handle (3). The bottom of the handle (3) is inserted into the corresponding limiting groove (52).

6. The stem of the top-mounted ball valve according to claim 1, characterized in that: The top of the rotating rod (2) is connected to a fastening bolt (7) with a coaxial thread. The handle (3) is sleeved on the top of the rotating rod (2). The fastening bolt (7) tightens and fixes the handle (3) on the rotating rod (2). The top of the handle (3) is connected to a sealing cover (8). The sealing cover (8) covers the outside of the fastening bolt (7).

7. The stem of the top-mounted ball valve according to claim 6, characterized in that: A positioning plate (9) is also fitted on the rotating rod (2), and the positioning plate (9) rotates synchronously with the rotating rod (2); a positioning block (90) is provided on the positioning plate (9), and a positioning seat (11) located on the rotation path of the positioning block (90) is integrally formed on the assembly base (1).

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