Self-locking three-way ball valve

Abstract

The self-locking three-way ball valve comprises a valve body, a valve element and a self-locking mechanism, a connector is arranged on the side face of the valve body, the valve element is connected into the valve body in a sealed and rotating mode, a flow channel capable of being communicated with the connector is arranged in the valve element, a limiting groove is formed in the inner wall of the lower side of the valve body, and a sliding groove penetrating through the inner wall and the outer wall of the valve element is formed in the lower side of the valve element. The self-locking mechanism comprises a piston, an anti-rotation bolt and an elastic piece, the piston is connected in the sliding groove in a sealed and sliding mode, and the upper end of the anti-rotation bolt is connected with the piston; after the upper side of the piston is pressed, the anti-rotation plug pin can be driven to be downwards inserted into the limiting groove so as to lock the valve element. The elastic piece is installed in the sliding groove and used for driving the piston upwards so as to pull out the anti-rotation plug pin. The utility model provides a three-way ball valve which is self-locked when fluid is in a conveying state and prevents direction switching.

Description

Technical Field

[0001] This utility model relates to the field of three-way ball valve technology, and in particular to a self-locking three-way ball valve. Background Technology

[0002] A three-way ball valve is used to change the direction of fluid flow. As shown in the patent application number CN202122087071.8, it includes a valve body, a ball core and a handle. The valve body is provided with a connection port, the valve core is rotatably connected to the valve body, the valve core is provided with a flow channel, and the handle is connected to the valve core so as to manually drive the valve core to rotate in order to change the direction of fluid flow.

[0003] Some existing three-way ball valves require the fluid to be stopped and the pressure inside the valve to be released before switching directions. However, these valves do not have a high-pressure self-locking function, making it easy for workers to switch the valve direction while the fluid is being transported, which can lead to undesirable consequences. Utility Model Content

[0004] To address the lack of self-locking function in existing three-way ball valves, this invention proposes a three-way ball valve that self-locks when the fluid is in the conveying state to prevent switching of direction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-locking three-way ball valve includes a valve body, a valve core, and a self-locking mechanism. The valve body has an interface on its side. The valve core is rotatably and sealed within the valve body and has a flow channel that communicates with the interface. A limit groove is provided on the lower inner wall of the valve body, and a sliding groove penetrating the inner and outer walls of the valve core is provided on the lower side of the valve core. The self-locking mechanism includes a piston, an anti-rotation pin, and an elastic element. The piston is slidably and sealed within the sliding groove, and the upper end of the anti-rotation pin is connected to the piston. When the upper side of the piston is pressed, it can drive the anti-rotation pin downwards into the limit groove to lock the valve core. The elastic element is installed in the sliding groove and is used to drive the piston upwards to pull out the anti-rotation pin.

[0007] With the above settings, when the fluid is in the conveying state, the anti-rotation pin automatically inserts into the limit groove to lock the valve core, preventing the valve core from being rotated and preventing worker misoperation.

[0008] Furthermore, the limiting groove has a square cross-section, the anti-rotation pin is a vertically arranged square steel, the lower end of the slide groove tapers inward and abuts against the anti-rotation pin, forming a support surface facing the piston, and the elastic element is installed between the support surface and the piston.

[0009] The above settings increase the stability of the anti-rotation pin's up-and-down movement. When the anti-rotation pin is made of square steel, it can be inserted into the limit groove every 90 degrees of rotation, which is exactly matched with the rotation angle of the valve core of the three-way ball valve.

[0010] Furthermore, the elastic element is set as a spring, which is sleeved on the anti-rotation pin. The upper end of the spring is connected to the piston, and the lower end is connected to the support surface.

[0011] Furthermore, the upper end of the groove narrows and forms a limiting surface facing the piston to limit the range of the piston's upward movement.

[0012] Furthermore, the three-way ball valve also includes a rotating shaft and a handle. The rotating shaft runs vertically through the valve body and is fixedly connected to the valve core, while the handle is fixedly connected to the upper end of the rotating shaft.

[0013] With the above setup, the worker can drive the valve core to rotate via the handle and shaft to switch the output direction of the three-way ball valve.

[0014] Furthermore, the handle includes a circular plate horizontally fixedly connected to the upper end of the rotating shaft, and a contour plate fixedly connected to the upper side of the circular plate, with several arc-shaped grooves provided on the edge of the contour plate.

[0015] The above settings increase the comfort of holding the contour plate.

[0016] Furthermore, the valve core is made of POM material.

[0017] The above settings increase the wear resistance of the valve core. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a three-way ball valve as an example.

[0019] Figure 2 This is a cross-sectional view of a three-way ball valve as an example.

[0020] Figure 3 for Figure 2 Enlarged view of point A.

[0021] Figure 4 This is a schematic diagram of the piston being pressed downwards in an embodiment. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] like Figures 1 to 4As shown, a self-locking three-way ball valve includes a valve body 3, a valve core 4, and a self-locking mechanism. The valve body 3 has an interface 5 on its side. The valve core 4 is rotatably and sealed within the valve body 3 and has a flow channel 6 that communicates with the interface 5. A limiting groove 7 is provided on the lower inner wall of the valve body 3. A sliding groove 8 penetrating the inner and outer walls of the valve core 4 is provided on the lower side of the valve core 4. The self-locking mechanism includes a piston 9, an anti-rotation pin 10, and an elastic element 11. The piston 9 is slidably and sealed within the sliding groove 8. The upper end of the anti-rotation pin 10 is connected to the piston 9. When the upper side of the piston 9 is pressed, it can drive the anti-rotation pin 10 downwards into the limiting groove 7 to lock the valve core 4. The elastic element 11 is installed in the sliding groove 8 and is used to drive the piston 9 upwards to pull out the anti-rotation pin 10.

[0024] With the above settings, when the fluid is in the conveying state, the anti-rotation pin 10 automatically inserts into the limit groove 7 to lock the valve core 4, preventing the valve core 4 from being rotated and preventing worker misoperation.

[0025] The valve body 3 and valve core 4 of this application can refer to existing three-way ball valves; three ports 5 are provided on the side of the valve body 3, such as... Figure 1 As shown, two interfaces 5 are coaxially arranged, and another interface 5 is perpendicularly arranged between the two interfaces 5. That is, the valve body 3 of this application is a T-shaped valve body 3, and the flow channel 6 inside the valve core 4 is also correspondingly T-shaped; the valve core 4 rotates around the axis of the anti-rotation pin 10 to switch the output direction of the three-way ball valve. In the initial state, as Figure 3 As shown, when the fluid stops flowing, the pressure inside the three-way ball valve is relatively low. At this time, the lower end of the anti-rotation pin 10 disengages from the limiting groove 7, and the valve core 4 can freely rotate around the axis of the anti-rotation pin 10 to switch the output direction of the three-way ball valve. However, when the fluid is in the conveying state, that is, when the fluid flows through the three-way ball valve, the pressure inside the three-way ball valve is relatively high. Under the action of fluid pressure, the piston 9 drives the anti-rotation pin 10 downward to insert into the limiting groove 7, as shown. Figure 4 As shown, at this time, the anti-rotation pin 10 acts as a pin, and the valve core 4 is circumferentially fixed in the valve body 3 by the anti-rotation pin 10 to prevent workers from operating it by mistake. Only when the fluid stops moving and the pressure inside the three-way ball valve is released, the piston 9 drives the anti-rotation pin 10 to reset upward under the action of the elastic element 11. The lower end of the anti-rotation pin 10 is pulled out from the limit groove 7, and the worker can rotate the valve core 4 to change the output direction of the three-way ball valve.

[0026] As one implementation method, the limiting groove 7 has a square cross-section, the anti-rotation pin 10 is a vertically arranged square steel, the lower end of the sliding groove 8 is narrowed inward and abuts against the anti-rotation pin 10, forming a support surface 12 facing the piston 9, and the elastic element 11 is installed between the support surface 12 and the piston 9.

[0027] The above settings increase the stability of the anti-rotation pin 10 in its up-and-down movement. When the anti-rotation pin 10 is made of square steel, it can be inserted into the limit groove 7 every time it rotates 90 degrees, which is exactly matched with the rotation angle of the valve core 4 of the three-way ball valve.

[0028] The lower end of the slide groove 8 of this application is narrowed and wrapped with the anti-rotation pin 10, which increases the stability of the anti-rotation pin 10 in its up and down movement and fixes the anti-rotation pin 10 in the circumferential direction. After the anti-rotation pin 10 is inserted into the limiting groove 7, it can lock the valve core 4. In order to make it easier for the anti-rotation pin 10 to be inserted into the limiting groove 7, a chamfer can be made at the lower end of the anti-rotation pin 10 or at the opening of the limiting groove 7.

[0029] In one implementation, the elastic element 11 is set as a spring, which is sleeved on the anti-rotation pin 10. The upper end of the spring is connected to the piston 9, and the lower end is connected to the support surface 12.

[0030] In the initial state of the three-way ball valve of this application, such as Figure 3 As shown, the spring force is essentially zero, and the lower end of the anti-rotation pin 10 is positioned above the limiting groove 7. However, when the fluid is in a conveying state, the pressure inside the three-way ball valve is relatively high, causing the piston 9 to compress the spring downwards. Figure 4 As shown, when the fluid stops flowing, the spring rebounds, driving the piston 9 to return to its original position.

[0031] As one implementation, the upper end of the slide groove 8 is narrowed, forming a limiting surface 13 facing the piston 9, so as to limit the range of upward movement of the piston 9.

[0032] The three-way ball valve of this application, in its initial state, such as Figure 3 As shown, the upper side of piston 9 abuts against the limiting surface 13.

[0033] As one implementation, the three-way ball valve also includes a rotating shaft 14 and a handle. The rotating shaft 14 extends vertically through the valve body 3 and is fixedly connected to the valve core 4. The handle is fixedly connected to the upper end of the rotating shaft 14.

[0034] With the above setup, the worker can drive the valve core 4 to rotate via the handle and the rotating shaft 14 to switch the output direction of the three-way ball valve.

[0035] In one implementation, the handle includes a circular plate 15 that is horizontally fixed to the upper end of the rotating shaft 14, and a contour plate 16 that is fixedly connected to the upper side of the circular plate 15. The contour plate 16 has several arc-shaped grooves on its edge.

[0036] The above settings increase the comfort of holding the contour plate 16.

[0037] As one implementation method, valve core 4 is made of POM material.

[0038] The above settings increase the wear resistance of valve core 4.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A self-locking three-way ball valve, characterized in that, The valve includes a valve body, a valve core, and a self-locking mechanism. The valve body has an interface on its side. The valve core is rotatably and sealingly connected to the valve body and has a flow channel that communicates with the interface. A limiting groove is provided on the lower inner wall of the valve body. A sliding groove penetrating the inner and outer walls of the valve core is provided on the lower side of the valve core. The self-locking mechanism includes a piston, an anti-rotation pin, and an elastic element. The piston is slidably and sealingly connected in the sliding groove. The upper end of the anti-rotation pin is connected to the piston. When the upper side of the piston is pressed, it can drive the anti-rotation pin downwards into the limiting groove to lock the valve core. The elastic element is installed in the sliding groove and is used to drive the piston upwards to pull out the anti-rotation pin.

2. The self-locking three-way ball valve according to claim 1, characterized in that, The limiting groove has a square cross-section, the anti-rotation pin is a vertically arranged square steel, the lower end of the sliding groove is narrowed inward and abuts against the anti-rotation pin, forming a support surface facing the piston, and the elastic element is installed between the support surface and the piston.

3. A self-locking three-way ball valve according to claim 2, characterized in that, The elastic element is configured as a spring, which is sleeved on the anti-rotation pin. The upper end of the spring is connected to the piston, and the lower end is connected to the support surface.

4. A self-locking three-way ball valve according to claim 3, characterized in that, The upper end of the groove narrows and forms a limiting surface facing the piston to limit the range of upward movement of the piston.

5. A self-locking three-way ball valve according to claim 1, characterized in that, The three-way ball valve also includes a rotating shaft and a handle. The rotating shaft extends vertically through the valve body and is fixedly connected to the valve core. The handle is fixedly connected to the upper end of the rotating shaft.

6. A self-locking three-way ball valve according to claim 5, characterized in that, The handle includes a circular plate horizontally fixedly connected to the upper end of the rotating shaft, and a contour plate fixedly connected to the upper side of the circular plate, the contour plate having several arc-shaped grooves on its edge.

7. A self-locking three-way ball valve according to claim 1, characterized in that, The valve core is made of POM material.

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