Manual valve capable of preventing misoperation

Abstract

The utility model provides a manual valve capable of preventing misoperation, which comprises a valve body, a valve core is arranged in the valve body, the top of the valve core is connected with a valve rod which is in sealing running fit with the valve body, the top end of the valve rod penetrates out of the valve body, and the top end of the valve rod is provided with a valve handle which is used for driving the valve rod to rotate so as to realize opening and closing of the manual valve, a self-locking mechanism which is matched with the valve rod to enable the valve rod to rotate within the range of 90 degrees so as to control opening and closing of the valve is arranged in the valve body; a character opening signboard and a character closing signboard are arranged on the outer surface of the top of the valve body, and the character opening signboard and the character closing signboard are arranged at an included angle of 90 degrees by taking the axis of the valve rod as an angular point; the valve handle is provided with an arrow board which rotates along with the valve handle and is used for pointing to the character opening signboard when the manual valve is fully opened and pointing to the character closing signboard when the manual valve is fully closed. By means of the self-locking mechanism, the character opening signboard, the character closing signboard and the arrow board, misoperation of the manual valve can be effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the field of manual valve technology, specifically relating to a manual valve to prevent misoperation. Background Technology

[0002] Manual valves are becoming increasingly widely used in daily life. As control components in pipeline fluid transport systems, they are used to change the cross-sectional area of ​​the passage and the direction of medium flow, and have functions such as guiding, stopping, regulating, throttling, checking backflow, diverting flow, or overflowing and relieving pressure. However, existing manual valves are prone to misoperation leading to incorrect valve opening and closing. Utility Model Content

[0003] This invention provides a manual valve to prevent misoperation, thereby solving the problem of misoperation that easily occurs when using manual valves in the prior art.

[0004] This utility model provides a manual valve to prevent accidental operation, including a valve body, a valve core inside the valve body, a valve stem connected to the top of the valve core and sealingly rotating with the valve body, the top of the valve stem extending out of the valve body, and a valve handle at the top of the valve stem for driving the valve stem to rotate to realize the manual valve opening and closing. The valve body has a self-locking mechanism inside that cooperates with the valve stem to allow the valve stem to rotate within a 90° range to control the valve opening and closing. The top outer surface of the valve body has an "Open" sign and a "Closed" sign, which are set at a 90° angle with the valve stem axis. The valve handle has an arrow that rotates with the valve handle and points to the "Open" sign when the manual valve is fully open and to the "Closed" sign when the manual valve is fully closed.

[0005] Compared with existing technologies, the advantages of this invention are as follows: By setting a self-locking mechanism to restrict the valve stem to rotate only within a 90° range, it effectively prevents accidental opening and closing of the valve due to excessive rotation or reverse operation; at the same time, the "open" and "closed" markings distributed at a 90° angle on the top of the valve body, in conjunction with the arrow markings on the valve handle, visually indicate the valve status, enabling operators to quickly and accurately identify the valve's open and closed position, further reducing the risk of misoperation. This structure retains the simplicity and reliability of manual valves while also providing operational safety and status visibility, significantly improving the reliability and safety of valve use.

[0006] Furthermore, the valve body has a cylindrical cavity centered on the valve stem axis and located above the valve core.

[0007] Furthermore, the self-locking mechanism includes a semi-circular toothed ring disposed in a cylindrical cavity and fixedly disposed on the side wall of the valve stem, a 90° sector-shaped limiting block disposed in the cylindrical cavity to limit the travel of the semi-circular toothed ring, and a braking assembly for engaging with the semi-circular toothed ring to brake the valve stem.

[0008] Furthermore, the braking assembly includes a housing disposed on the outer wall of the valve body and opposite to the 90° sector-shaped limiting block, and a U-shaped connecting rod disposed in the housing; the ends of the two oppositely disposed connecting rods on the U-shaped connecting rod pass through the valve body and are connected to an arc-shaped brake rack; a top post is disposed at the end of the U-shaped connecting rod away from the arc-shaped brake rack, which passes through the housing and is slidably and sealed to the housing; a stud is rotatably disposed at the end of the top post away from the housing, which has an external thread at the bottom and is used to thread it to the housing to drive the top post to push the arc-shaped brake rack and engage with the semi-circular gear ring through the U-shaped connecting rod.

[0009] Furthermore, the valve body has a first through hole for passing through and slidingly engaging with the U-shaped connecting rod; the housing has a second through hole for passing through and slidingly engaging with the top post, and a threaded countersunk hole for threaded connection with the stud is provided on the circumferential side of the second through hole away from the U-shaped connecting rod.

[0010] Furthermore, a pull ring is provided at the end of the stud away from the housing to facilitate pulling and rotating the stud.

[0011] Furthermore, springs located inside the housing are respectively fitted onto the two opposing connecting rods on the U-shaped connecting rod. Attached Figure Description

[0012] Figure 1 A top view of the manual valve provided by this utility model;

[0013] Figure 2 A front sectional view of the manual valve provided by this utility model;

[0014] Figure 3 A top sectional view of the self-locking mechanism provided by this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Valve body; 2. Valve core; 3. Valve stem; 4. Valve handle; 5. Cylindrical cavity; 6. Semi-circular gear ring; 7. Arc-shaped brake rack; 8. U-shaped connecting rod; 9. Spring; 10. Top post; 11. Stud; 12. Pull ring; 13. Housing; 14. Second through hole; 15. Threaded countersunk hole; 16. 90° sector-shaped limit block; 17. Open sign; 18. Closed sign; 19. Arrow sign. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] This utility model provides a manual valve to prevent accidental operation, combined with Figures 1 to 2 As shown, the valve includes a valve body 1, a valve core 2 is provided inside the valve body 1, a valve stem 3 is connected to the top of the valve core 2, the valve stem 3 is sealed and rotated with the valve body 1 and its top end protrudes from the valve body 1, and a valve handle 4 is provided at the top of the valve stem 3. The valve handle 4 is used to drive the valve stem 3 to rotate, thereby realizing the opening and closing of the manual valve.

[0019] The valve body 1 is internally equipped with a self-locking mechanism, which cooperates with the valve stem 3 to allow the valve stem 3 to rotate within a 90° range, thereby controlling the opening and closing of the valve. Figure 3 As shown, a cylindrical cavity 5 is provided inside the valve body 1, and the cylindrical cavity 5 is centered on the axis of the valve stem 3 and located above the valve core 2. The self-locking mechanism includes a semi-circular gear ring 6, a 90° sector-shaped limiting block 16, and a braking assembly. The semi-circular gear ring 6 is disposed in the cylindrical cavity 5 and fixedly disposed on the side wall of the valve stem 3, and rotates with the valve stem 3. The 90° sector-shaped limiting block 16 is disposed in the cylindrical cavity 5 and is used to limit the stroke of the semi-circular gear ring 6. The braking assembly is used to engage with the semi-circular gear ring 6, thereby using the semi-circular gear ring 6 to brake the valve stem 3.

[0020] The braking assembly includes a housing 13, which is disposed on the outer wall of the valve body 1 and opposite to the 90° sector-shaped limiting block 16. A U-shaped connecting rod 8 is disposed within the housing 13. A first through hole is provided on the valve body 1. The ends of two opposing connecting rods on the U-shaped connecting rod 8 pass through the first through hole into the valve body 1 and slide in engagement with it. The ends of the two opposing connecting rods on the U-shaped connecting rod 8 are connected to an arc-shaped brake rack 7. A top post 10 is provided at the end of the U-shaped connecting rod 8 furthest from the arc-shaped brake rack 7. A second through hole 14 is provided on the housing 13. The top post 10 passes through the second through hole 14 out of the housing 13 and slides in a sealed manner with the housing 13, thereby ensuring the sealing of the valve body 1. A stud 11 is rotatably provided at the end of the top post 10 away from the housing 13. The stud 11 has an external thread near the bottom of the top post 10. A threaded countersunk hole 15 is provided on the circumference of the end of the second through hole 14 away from the U-shaped connecting rod 8. The stud 11 is threadedly connected to the housing 13 through the external thread and the threaded countersunk hole 15, thereby driving the top post 10 to push the arc-shaped brake rack 7 to mesh with the semi-circular gear ring 6 through the U-shaped connecting rod 8.

[0021] A pull ring 12 is provided at the end of the stud 11 away from the housing 13, so as to facilitate pulling and rotating the stud 11. Springs 9 are respectively sleeved on the two opposite connecting rods on the U-shaped connecting rod 8. The springs 9 are located in the housing 13. When the brake is released, the springs 9 are used to drive the arc-shaped brake rack 7 away from the semi-circular toothed ring 6.

[0022] The top outer surface of the valve body 1 is provided with an "Open" sign 17 and a "Closed" sign 18, which are set at a 90° angle with the valve stem 3 axis as the corner point. The valve handle 4 is provided with an arrow sign 19 that rotates with the valve handle 4. When the manual valve is fully open, the arrow sign 19 points to the "Open" sign 17; when the manual valve is fully closed, the arrow sign 19 points to the "Closed" sign 18, thus prompting the operator to manually open or close the valve.

[0023] In use, this invention drives the valve stem 3 to rotate via the valve handle 4. During the rotation of the valve stem 3, the 90° sector-shaped limiting block 16 limits the stroke of the valve stem 3. When the arrow 19 on the valve handle 4 points to the "open" sign 17, the manual valve is fully open. By pressing down the stud 11 and screwing it into the threaded countersunk hole 15, the arc-shaped brake rack 7 engages with the semi-circular gear ring 6, achieving self-locking of the valve stem 3. This prevents the valve stem 3 from rotating due to operator error or unintentional collision while the manual valve is open. When the manual valve needs to be closed, unscrew and pull out the stud 11 to separate the arc-shaped brake rack 7 from the semi-circular gear ring 6, thus unlocking the valve stem 3. Rotate the valve handle 4 in the opposite direction; when the arrow 19 on the valve handle 4 points to the "closed" sign 18, the manual valve is fully closed. Pressing down the stud 11 and screwing it into the threaded countersunk hole 15 engages the arc-shaped brake rack 7 with the semi-circular gear ring 6, achieving self-locking of the valve stem 3. This prevents the valve stem 3 from rotating due to misoperation or unintentional collision when the manual valve is closed. Furthermore, adjusting the opening of the manual valve to be larger or smaller will also achieve self-locking of the valve stem 3 through the engagement of the arc-shaped brake rack 7 with the semi-circular gear ring 6, thus preventing misoperation.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. If these modifications and variations fall within the scope of the claims of this utility model and their equivalents, they should be considered to be within the protection scope of this utility model.

Claims

1. A manual valve for preventing accidental operation, characterized in that, The valve body (1) includes a valve core (2) inside the valve body (1). A valve stem (3) is connected to the top of the valve core (2) and is sealed and rotated with the valve body (1) with its top end protruding from the valve body (1). A valve handle (4) is provided at the top of the valve stem (3) to drive the valve stem (3) to rotate and realize the manual valve opening and closing. A self-locking mechanism is provided inside the valve body (1) to cooperate with the valve stem (3) to realize the valve stem (3) to rotate within a 90° range to control the valve opening and closing. An "open" sign (17) and a "closed" sign (18) are provided on the top outer surface of the valve body (1). The "open" sign (17) and the "closed" sign (18) are set at a 90° angle with the center of the valve stem (3) as the corner point. An arrow sign (19) is provided on the valve handle (4) to rotate with the valve handle (4) and to point to the "open" sign (17) when the manual valve is fully open and to point to the "closed" sign (18) when the manual valve is fully closed.

2. The manual valve for preventing misoperation according to claim 1, characterized in that, The valve body (1) has a cylindrical cavity (5) centered on the axis of the valve stem (3) and located above the valve core (2).

3. The manual valve for preventing misoperation according to claim 2, characterized in that... The self-locking mechanism includes a semi-circular toothed ring (6) disposed in a cylindrical cavity (5) and fixedly disposed on the side wall of the valve stem (3), a 90° sector-shaped limiting block (16) disposed in the cylindrical cavity (5) to limit the stroke of the semi-circular toothed ring (6), and a braking assembly for engaging with the semi-circular toothed ring (6) to brake the valve stem (3).

4. The manual valve for preventing misoperation according to claim 3, characterized in that, The braking assembly includes a box (13) disposed on the outer wall of the valve body (1) and opposite to the 90° sector-shaped limiting block (16). A U-shaped connecting rod (8) is disposed in the box (13). The ends of the two opposite connecting rods on the U-shaped connecting rod (8) pass through the valve body (1) and are connected to an arc-shaped brake rack (7). A top post (10) is disposed at the end of the U-shaped connecting rod (8) away from the arc-shaped brake rack (7) and passes through the box (13) and is sealed and slidably assembled with the box (13). A stud (11) is rotatably disposed at the end of the top post (10) away from the box (13) with an external thread at the bottom for threaded connection with the box (13) to drive the top post (10) to push the arc-shaped brake rack (7) and mesh with the semi-circular gear ring (6) through the U-shaped connecting rod (8).

5. The manual valve for preventing misoperation according to claim 4, characterized in that, The valve body (1) has a first through hole for passing through the U-shaped connecting rod (8) and slidingly engaging with the U-shaped connecting rod (8); the box body (13) has a second through hole (14) for passing through the top post (10) and slidingly engaging with the top post (10). The second through hole (14) has a threaded countersunk hole (15) on the circumference of one end away from the U-shaped connecting rod (8) for threaded connection with the stud (11).

6. The manual valve for preventing misoperation according to claim 4, characterized in that, The end of the stud (11) away from the housing (13) is provided with a pull ring (12) to facilitate pulling and rotating the stud (11).

7. The manual valve for preventing misoperation according to claim 4, characterized in that, Springs (9) located in the housing (13) are respectively sleeved on the two opposite connecting rods of the U-shaped connecting rod (8).

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