Ball valve with better safety performance

Abstract

The utility model discloses a ball valve with better safety performance, which comprises a valve body, a support, a valve rod, an actuator and a ball body, and a valve seat which is used for forming sealing fit with the ball body when the valve is closed is arranged in the valve body; a valve neck part is arranged at the upper end of the valve body, a safety locking mechanism is arranged on the valve neck part and comprises an operation ring, a locking marble and a spring, the operation ring is rotationally arranged on the periphery of the valve neck part, the locking marble is arranged on the valve neck part in a sliding and penetrating mode in the radial direction of the valve neck part, and the locking marble is locked under the action of the spring. The outer end of the locking marble abuts against the inner circumferential face of the operation ring, a locking groove is formed in the periphery of the valve rod, and when the valve is closed, the locking groove rotates to the inner end of the locking marble, and the operation ring can drive the locking marble to be inserted into or slide out of the locking groove. The safety locking mechanism is arranged on the valve, the valve rod is locked when the valve is closed, the situation that the ball valve is accidentally opened due to misoperation of a user is prevented, and therefore safety accidents are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a ball valve with better safety performance. Background Technology

[0002] Ball valves are widely used in fluid control. In fluid control applications, ball valves in pipelines are mainly used to open, close, distribute the flow of fluid media, and change the flow direction and velocity of fluid media.

[0003] Currently, ball valves on the market generally consist of a valve body, valve cover, valve stem, and ball. The valve cover is installed on the upper part of the valve body, and the valve stem passes through the valve cover and extends into the valve body to connect with the ball. A valve seat is installed inside the valve body to form a sealing fit with the ball when the valve is closed. However, most ball valves on the market only have basic opening and closing functions. In actual use, when the ball valve is in the closed state and the pipeline is under high pressure, there is a probability that workers or children may accidentally operate or touch the valve's operating mechanism, causing the ball valve to open. In severe cases, this could overload equipment or even cause an explosion. Therefore, it is necessary to design a ball valve with better safety performance to avoid safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a ball valve with better safety performance. This utility model sets a safety locking mechanism on the valve to lock the valve stem when the valve is closed, preventing accidental opening of the ball valve due to user misoperation, thereby effectively avoiding safety accidents and having the advantage of better safety performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ball valve with improved safety performance, comprising a valve body, a bracket, a valve stem, an actuator, and a ball. The upper end of the valve body is provided with a shaft hole for the valve stem to extend into. The bracket is installed on the upper end of the valve body, and the actuator is installed on the bracket. The outer end of the valve stem is connected to the actuator, and the inner end of the valve stem is connected to the ball disposed within the valve body. The valve body also provides a valve seat for forming a sealing fit with the ball when the valve is closed. The upper end of the valve body is provided with a valve neck, and the valve neck is provided with a safety locking mechanism. The safety locking mechanism includes an operating ring, a locking pin, and a spring. The operating ring is rotatably disposed on the outer periphery of the valve neck, and the locking pin slides radially through the valve neck. Under the action of the spring, the outer end of the locking pin abuts against the inner circumferential surface of the operating ring. The outer periphery of the valve stem is provided with a locking groove. When the valve is closed, the locking groove rotates to the inner end position of the locking pin, and the operating ring can drive the locking pin to insert into or slide out of the locking groove.

[0006] By adopting the above technical solution and installing a safety locking mechanism on the valve, when the valve is closed, rotating the operating ring presses the locking tumbler into the locking groove of the valve stem, locking the valve stem. When the valve needs to be opened, simply reverse the operating ring, and the locking tumbler disengages from the locking groove of the valve stem under the action of the spring. This prevents accidental opening of the ball valve due to user error, effectively avoiding safety accidents and offering superior safety performance.

[0007] The present invention is further configured such that an outer hole and an inner hole communicating with a shaft hole are provided through the valve neck of the valve body, the diameter of the outer hole is larger than the diameter of the inner hole, so that a limiting step is formed between the two, the locking ball passes through the outer hole and the inner hole, the outer periphery of the locking ball is provided with a guide flange, the outer circular surface of the guide flange is tightly attached to the inner circular surface of the outer hole, and a sealing ring for forming a sealing fit with the inner circular surface of the outer hole is installed on the outer circular surface of the guide flange, and the two ends of the spring abut against the limiting step and the guide flange respectively.

[0008] By adopting the above technical solution, the positioning and installation of the locking tumbler and spring can be achieved, and the installation structure is stable and reliable.

[0009] The present invention is further configured such that the inner circumferential surface of the operating ring is provided with a retraction groove and an ejection groove, the depth of the retraction groove being greater than the depth of the ejection groove. When the operating ring is rotated, when the outer end of the locking pin is inserted into the retraction groove, the inner end of the locking pin disengages from the locking groove; when the outer end of the locking pin is inserted into the ejection groove, the inner end of the locking pin is inserted into the locking groove.

[0010] By adopting the above technical solution, the linkage between the operating ring and the locking tumbler can be realized. The structure is simple and reliable, and it is easy to produce and assemble.

[0011] The present invention is further configured such that the outer end of the locking tumbler is provided with a rolling groove, a ball is rolled in the rolling groove, and the ball extends out of the rolling groove and rolls in cooperation with the inner circumferential surface of the operating ring.

[0012] By adopting the above technical solution and the rolling engagement method, the engagement resistance between the locking pin and the operating ring can be significantly reduced, making the rotation operation of the operating ring smoother.

[0013] The present invention is further configured such that an upper limit ring and a lower limit ring are welded to the outer periphery of the valve neck of the valve body, and an annular groove is formed between the upper limit ring and the lower limit ring, and the operating ring is rotatably disposed in the annular groove.

[0014] By adopting the above technical solution, the operating ring is restricted to rotate only in the circumferential direction, resulting in a stable and reliable structure.

[0015] The present invention is further configured such that the operating ring includes a left half ring and a right half ring, and the left half ring and the right half ring are detachably connected together by fastening screws.

[0016] By adopting the above technical solution, the detachable structure of the operating ring makes it easy to install it on the outer periphery of the valve neck and remove it when subsequent maintenance is required.

[0017] The present invention is further configured such that the lower end of the upper limit ring is provided with a positioning protrusion in the shape of a hemispherical surface, and the upper end surface of the operating ring is provided with a locking positioning groove and an unlocking positioning groove for engaging with the positioning protrusion. When the operating ring is rotated, when the inner end of the locking tumbler is inserted into the locking groove, the positioning protrusion engages with the locking positioning groove; when the inner end of the locking tumbler is disengaged from the locking groove, the positioning protrusion engages with the unlocking positioning groove.

[0018] By adopting the above technical solution, the operating ring can be positioned when it reaches the locked and unlocked positions, preventing it from shifting under slight external force and causing the valve stem to unlock.

[0019] The present invention is further configured such that an arc-shaped guide groove is provided between the locking positioning groove and the unlocking positioning groove, the depth of which is less than the depth of the locking positioning groove and the unlocking positioning groove.

[0020] By adopting the above technical solution, the outer end of the positioning protrusion can move more easily between the locking positioning groove and the unlocking positioning groove without requiring a large operating torque, making the operation easier and less strenuous.

[0021] The present invention is further configured such that a plurality of operating recesses are provided on the outer peripheral surface of the operating ring.

[0022] By adopting the above technical solution, an operating recess is provided on the outer circumference of the operating ring for the user's hand to insert and apply torque, making it easier for the user to rotate the operating ring. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0025] Figure 3 A schematic diagram of the structure of the operating ring of this utility model;

[0026] Figure 4 This is an exploded view of the operating ring of this utility model.

[0027] In the diagram: 1. Valve body; 2. Bracket; 3. Valve stem; 4. Actuator; 5. Ball; 6. Shaft hole; 7. Valve seat; 8. Valve neck; 9. Safety locking mechanism; 10. Operating ring; 11. Locking tumbler; 12. Spring; 13. Locking groove; 14. Outer hole; 15. Inner hole; 16. Limiting step; 17. Guide flange; 18. Sealing ring; 19. Retraction groove; 20. Ejection groove; 21. Rolling groove; 22. Ball; 23. Upper limit ring; 24. Lower limit ring; 25. Annular groove; 26. Left half ring; 27. Right half ring; 28. Fastening screw; 29. ​​Positioning protrusion; 30. Locking positioning groove; 31. Unlocking positioning groove; 32. Arc-shaped guide groove; 33. Operating recess. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example: As attached Figures 1-4The ball valve shown has improved safety performance and includes a valve body 1, a bracket 2, a valve stem 3, an actuator 4, and a ball 5. The upper end of the valve body 1 has a shaft hole 6 for the valve stem 3 to extend into. The bracket 2 is mounted on the upper end of the valve body 1. The actuator 4 is mounted on the bracket 2. The outer end of the valve stem 3 is connected to the actuator 4, and the inner end of the valve stem 3 is connected to the ball 5 located inside the valve body 1. The actuator 4 can be an electric actuator 4, a pneumatic actuator 4, or a handwheel. The actuator 4 drives the valve stem 3 to rotate, which in turn drives the ball 5 to rotate, realizing the opening and closing operation of the valve. The valve body 1 also has a valve seat 7 for forming a sealing fit with the ball 5 when the valve is closed. A valve neck 8 is integrally formed on the upper end of the valve body 1. A safety locking mechanism 9 is provided on the valve neck 8. The safety locking mechanism 9 includes an operating ring 10, a locking pin 11, and a spring 12. The operating ring 10 is rotatably disposed on the outer periphery of the valve neck 8. The locking pin 11 slides radially through the valve neck 8 and, under the action of the spring 12, the outer end of the locking pin 11 abuts against the inner circumferential surface of the operating ring 10. A locking groove 13 is provided on the outer periphery of the valve stem 3. When the valve is closed, the locking groove 13 rotates to the inner end position of the locking pin 11, and the operating ring 10 can drive the locking pin 11 to insert into or slide out of the locking groove 13. A safety locking mechanism 9 is installed on the valve. When the valve is closed, rotating the operating ring 10 presses the locking tumbler 11 into the locking groove 13 of the valve stem 3, locking the valve stem 3. When the valve needs to be opened, simply reverse the operating ring 10, and the locking tumbler 11 disengages from the locking groove 13 of the valve stem 3 under the action of the spring 12. This prevents accidental opening of the ball valve due to user misoperation, effectively avoiding safety accidents and providing better safety performance.

[0030] As attached Figure 2 As shown, the valve neck 8 of the valve body 1 has an outer hole 14 and an inner hole 15 that communicate with the shaft hole 6. The outer hole 14 and the inner hole 15 are coaxially arranged. The diameter of the outer hole 14 is larger than the diameter of the inner hole 15, forming a limiting step 16 between them. The locking tumbler 11 passes through the outer hole 14 and the inner hole 15. The outer periphery of the locking tumbler 11 is provided with a guide flange 17. The outer circular surface of the guide flange 17 is in close contact with the inner circular surface of the outer hole 14, and a sealing ring 18 is installed on the outer circular surface of the guide flange 17 to form a sealing fit with the inner circular surface of the outer hole 14. Specifically, an annular groove can be provided on the outer circular surface of the guide flange 17 to embed the sealing ring 18. The two ends of the spring 12 abut against the limiting step 16 and the guide flange 17, respectively. This design can realize the positioning and installation of the locking tumbler 11 and the spring 12, and the installation structure is stable and reliable.

[0031] As attached Figure 2 and attached Figure 3As shown, the inner circumferential surface of the operating ring 10 is provided with a retraction groove 19 and an ejection groove 20. The depth of the retraction groove 19 is greater than the depth of the ejection groove 20. When the operating ring 10 is rotated, when the outer end of the locking pin 11 is inserted into the retraction groove 19, the inner end of the locking pin 11 disengages from the locking groove 13. When the outer end of the locking pin 11 is inserted into the ejection groove 20, the inner end of the locking pin 11 is inserted into the locking groove 13. This design can realize the linkage between the operating ring 10 and the locking pin 11, and the structure is simple, reliable, and easy to manufacture and assemble.

[0032] As attached Figure 2 As shown, the outer end of the locking pin 11 is provided with a rolling groove 21, and a ball 22 is rolled within the rolling groove 21. Part of the ball 22 extends outside the rolling groove 21 and rolls in engagement with the inner circumferential surface of the operating ring 10. The ball 22 can be partially disposed within the rolling groove 21 and partially outside. This rolling engagement significantly reduces the resistance between the locking pin 11 and the operating ring 10, making the rotation of the operating ring 10 smoother.

[0033] As attached Figure 2 As shown, an upper limit ring 23 and a lower limit ring 24 are welded to the outer periphery of the valve neck 8 of the valve body 1. An annular groove 25 is formed between the upper limit ring 23 and the lower limit ring 24, and the operating ring 10 is rotatably disposed in the annular groove 25. The operating ring 10 is restricted to rotate only in the circumferential direction, making the structure stable and reliable.

[0034] As attached Figure 3 and attached Figure 4 As shown, the operating ring 10 includes a left half-ring 26 and a right half-ring 27, which are detachably connected together by fastening screws 28. Specifically, a stepped hole is provided on the left half-ring 26 for the threaded portion of the fastening screw 28 to pass through, and a threaded hole is provided on the right half-ring 27 for the threaded portion of the fastening screw 28 to be screwed in. The detachable structure of the operating ring 10 facilitates its installation on the outer periphery of the valve neck 8 and its removal for subsequent maintenance.

[0035] As attached Figure 2 and attached Figure 3As shown, the lower end of the upper limit ring 23 is provided with a hemispherical positioning protrusion 29, and the upper end surface of the operating ring 10 is provided with a locking positioning groove 30 and an unlocking positioning groove 31 for engaging with the positioning protrusion 29. When the operating ring 10 is rotated, when the inner end of the locking tumbler 11 is inserted into the locking groove 13, the positioning protrusion 29 engages with the locking positioning groove 30. When the inner end of the locking tumbler 11 is disengaged from the locking groove 13, the positioning protrusion 29 engages with the unlocking positioning groove 31. This design can position the operating ring 10 when it reaches the locked and unlocked positions, preventing it from shifting under slight external force and causing the valve stem 3 to unlock.

[0036] As attached Figure 3 As shown, an arc-shaped guide groove 32 is provided between the locking positioning groove 30 and the unlocking positioning groove 31, and the depth of the arc-shaped guide groove 32 is less than the depth of the locking positioning groove 30 and the unlocking positioning groove 31. This design allows the outer end of the positioning protrusion 29 to move more easily between the locking positioning groove 30 and the unlocking positioning groove 31 without requiring a large operating torque, making the operation easier and less strenuous.

[0037] As attached Figure 3 As shown, the operating ring 10 has multiple operating recesses 33 on its outer circumferential surface. The operating recesses 33 on the outer circumferential surface of the operating ring 10 are provided for the user's hand to engage and apply torque, making it easier for the user to rotate the operating ring 10.

Claims

1. A ball valve with improved safety performance, comprising a valve body (1), a bracket (2), a valve stem (3), an actuator (4) and a ball (5), an axle hole (6) for the valve stem (3) to extend into is arranged at the upper end of the valve body (1), the bracket (2) is installed at the upper end of the valve body (1), the actuator (4) is installed on the bracket (2), the outer end of the valve stem (3) is connected with the actuator (4), the inner end of the valve stem (3) is connected with the ball (5) arranged in the valve body (1), and a valve seat (7) for sealing cooperation with the ball (5) when the valve is closed is further arranged in the valve body (1); characterized in that: The valve body (1) upper end is provided with a valve neck (8), the valve neck (8) is provided with a safety locking mechanism (9), the safety locking mechanism (9) includes an operating ring (10), a locking marble (11) and a spring (12), the operating ring (10) is rotationally arranged on the outer periphery of the valve neck (8), the locking marble (11) is radially slid along the valve neck (8) and is provided with a locking slot (13) on the valve neck (8), and the outer end of the locking marble (11) is in abutment with the inner periphery of the operating ring (10) under the action of the spring (12), the outer periphery of the valve stem (3) is provided with a locking slot (13), when the valve is closed, the locking slot (13) is rotated to the inner end position of the locking marble (11), and the operating ring (10) can drive the locking marble (11) to insert or slide out of the locking slot (13).

2. The ball valve with better safety performance according to claim 1, characterized in that: The valve neck (8) of the valve body (1) is provided with an outer hole (14) and an inner hole (15) in communication with the shaft hole (6), the diameter of the outer hole (14) is greater than that of the inner hole (15), so that a limiting step (16) is formed between them, the locking marble (11) penetrates the outer hole (14) and the inner hole (15), the outer periphery of the locking marble (11) is provided with a guide flange (17), the outer circular surface of the guide flange (17) is closely arranged with the inner circular surface of the outer hole (14), and a sealing ring (18) is installed on the outer circular surface of the guide flange (17) for sealing cooperation with the inner circular surface of the outer hole (14), and the two ends of the spring (12) are respectively in abutment with the limiting step (16) and the guide flange (17).

3. The ball valve with better safety performance according to claim 2, characterized in that: The inner periphery of the operating ring (10) is provided with a retraction groove (19) and an ejection groove (20), the depth of the retraction groove (19) is greater than that of the ejection groove (20), rotating the operating ring (10), when the outer end of the locking marble (11) is embedded in the retraction groove (19), the inner end of the locking marble (11) is separated from the locking slot (13), when the outer end of the locking marble (11) is embedded in the ejection groove (20), the inner end of the locking marble (11) is inserted into the locking slot (13).

4. The ball valve with better safety performance according to claim 3, characterized in that: The outer end of the locking marble (11) is provided with a rolling groove (21), a ball (22) is rollingly arranged in the rolling groove (21), and the ball (22) partially extends outside the rolling groove (21) and rollingly cooperates with the inner periphery of the operating ring (10).

5. The ball valve with better safety performance according to claim 1, characterized in that: The outer periphery of the valve neck (8) of the valve body (1) is welded with an upper limiting ring (23) and a lower limiting ring (24), an annular groove (25) is formed between the upper limiting ring (23) and the lower limiting ring (24), and the operating ring (10) is rotationally arranged in the annular groove (25).

6. The ball valve with better safety performance according to claim 5, characterized in that: The operating ring (10) includes a left half ring (26) and a right half ring (27), and the left half ring (26) and the right half ring (27) are detachably connected together by a fastening screw (28).

7. The ball valve with better safety performance according to claim 6, characterized in that: The upper limit ring (23) is provided with a positioning convex (29) in the shape of a hemisphere at its lower end, and the upper end surface of the operating ring (10) is provided with a locking positioning groove (30) and an unlocking positioning groove (31) for engaging with the positioning convex (29). When the inner end of the locking ball (11) is inserted into the locking groove (13), the positioning convex (29) engages with the locking positioning groove (30), and when the inner end of the locking ball (11) is separated from the locking groove (13), the positioning convex (29) engages with the unlocking positioning groove (31).

8. The ball valve with better safety performance according to claim 7, characterized in that: An arc-shaped guide groove (32) is provided between the locking positioning groove (30) and the unlocking positioning groove (31) and communicates with them, and the depth of the arc-shaped guide groove (32) is less than that of the locking positioning groove (30) and the unlocking positioning groove (31).

9. The ball valve with better safety performance according to claim 5, characterized in that: A plurality of operating recesses (33) are provided on the outer peripheral surface of the operating ring (10).

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