Bidirectional safety valve

Abstract

The utility model discloses a two-way safety valve, which belongs to the technical field of two-way safety valves, and comprises a valve body and a valve core, the inner walls of two O-shaped grooves are connected with O-shaped pads, the inner wall of the valve body is rotatably connected with the outer surface of the valve core, the inner wall of a sealing groove is connected with a sealing pad, the outer surface of the sealing pad is in contact with a pressing sheet, and the outer surface of the pressing sheet is in contact with the sealing pad. Through cooperation of an O-shaped groove, a sealing groove and a pressing piece, the O-shaped groove is provided with a space for containing an O-shaped pad, the stability of the O-shaped pad is kept through the O-shaped groove when a valve element is rotated, the O-shaped pad cannot deform, the O-shaped pad cannot be driven by rotation of the valve element to move, through extrusion of the pressing piece on the sealing pad, the sealing pad makes contact with the valve element more tightly, and the sealing effect is better. When the sealing gasket is extruded by the pressing piece, the sealing gasket cannot deform through wrapping of the sealing groove, the stability of the outline appearance of the sealing gasket is kept, and the sealing effect on the valve element is improved through double sealing of the O-shaped gasket and the sealing gasket on the valve element.

Description

Technical Field

[0001] The utility model relates to the technical field of two-way safety valves, and particularly relates to a two-way safety valve. Background Art

[0002] A two-way safety valve is a special type of safety valve that opens when the pressure exceeds a preset value and can discharge the medium to the outside to protect the safety of the pressure vessel. Different from the traditional one-way safety valve, the two-way safety valve can release pressure in two directions. It can not only open when the positive pressure exceeds the set value, but also open when the reverse pressure is abnormal, ensuring the safety of the pressure vessel in multiple directions.

[0003] In the existing two-way safety valve, the valve core inside only has one sealing gasket. The one-sealing-gasket two-way safety valve may cause the sealing gasket to deform over a long time. After deformation, a gap is generated between the sealing gasket and the valve core, resulting in the deformed sealing gasket being unable to seal the valve core, causing medium leakage. To solve this technical problem, the utility model proposes a two-way safety valve. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a two-way safety valve, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A two-way safety valve, comprising a valve body and a valve core. A first connector is connected to the top end of the valve body, and a second connector is connected to the bottom end of the valve body. Both the first connector and the second connector are in communication with the inside of the valve body. Two O-ring grooves are formed in the wall of the valve body, and O-ring gaskets are connected to the inner walls of the two O-ring grooves. The inner wall of the valve body is rotationally connected to the outer surface of the valve core. A through hole is formed in the inner side of the valve core, and a sealing groove is formed in the inner side of the valve body. A sealing gasket is connected to the inner wall of the sealing groove, and at the same time, the sealing gasket is rotationally connected to the outer surface of the valve core. The outer surface of the sealing gasket is in contact with a pressing piece. A cover plate is connected to the outer surface of the valve body, and the outer surface of the cover plate is in contact with the outer surface of the pressing piece. One end of the valve core located outside the valve body is connected to a handle.

[0007] Preferably, a square block is connected to one end of the valve core located outside the valve body. The outer surface of the square block is connected to the inner wall of the handle, and a positioning block is connected to one end of the handle.

[0008] Preferably, two stoppers are connected to the outer surface of the cover plate, and the two stoppers form a right angle. The outer surface of the stopper is in contact with the outer surface of the positioning block.

[0009] Preferably, a clamping block is connected to one side of the positioning block, and the outer surface of the clamping block is in contact with the outer surface of the positioning block.

[0010] Preferably, one end of the valve core located outside the valve body is provided with a direction groove, and the direction groove is consistent with the direction of the through hole.

[0011] Preferably, a threaded hole is provided inside the valve body, and a connection hole is provided inside the cover plate, and the connection hole is adapted to the threaded hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, through the cooperation between the O-shaped groove, the sealing groove and the pressing piece, the O-shaped groove has a space for placing the O-shaped gasket. When the valve core is rotated, the stability of the O-shaped gasket is maintained through the O-shaped groove, so that the O-shaped gasket will not be deformed, and the O-shaped gasket cannot be driven by the rotation of the valve core to move its position, thus maintaining the stability of the O-shaped gasket. Through the extrusion of the sealing gasket by the pressing piece, the sealing gasket is in closer contact with the valve core. When the sealing gasket is extruded by the pressing piece, it is wrapped by the sealing groove, so that the sealing gasket will not be deformed, and the stability of the contour appearance of the sealing gasket is maintained. Through the double sealing of the valve core by the O-shaped gasket and the sealing gasket, the sealing effect on the valve core is improved.

[0014] In the utility model, through the cooperation between the square block, the direction groove and the handle, the direction groove is consistent with the through hole inside the valve core. Through the orientation of the direction groove, it can be judged from the outside of the valve body whether the two-way safety valve is closed or opened. When the direction groove is vertical, it is in the open state, and when the direction groove is horizontal, it is in the closed state, which is convenient for the operator to check whether the two-way safety valve is in the closed or open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the two-way safety valve of the utility model;

[0016] Figure 2 is a schematic diagram of the internal structure of the valve body in the two-way safety valve of the utility model;

[0017] Figure 3 is a sectional view of the valve body in the two-way safety valve of the utility model;

[0018] Figure 4 is a schematic diagram of the overall three-dimensional structure of the valve core in the two-way safety valve of the utility model;

[0019] Figure 5 is a schematic diagram of the overall three-dimensional structure of the handle in the two-way safety valve of the utility model.

[0020] In the figure: 1. Valve body; 2. Valve core; 3. First connector; 4. Second connector; 5. O-ring groove; 6. O-ring; 7. Through hole; 8. Sealing groove; 9. Sealing gasket; 10. Pressing piece; 11. Cover plate; 12. Handle; 13. Square block; 14. Positioning block; 15. Stopper; 16. Direction groove; 17. Threaded hole; 18. Connecting hole; 19. Clamping block. Detailed implementation manner

[0021] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0022] As Figures 1-5 shown, the two-way safety valve includes a valve body 1 and a valve core 2. A first connector 3 is connected to the top end of the valve body 1, and a second connector 4 is connected to the bottom end of the valve body 1. Both the first connector 3 and the second connector 4 are communicated with the inside of the valve body 1. The first connector 3 and the second connector 4 are connected to the pipe fittings to be connected. Two O-ring grooves 5 are formed in the wall of the valve body 1. O-rings 6 are connected to the inner walls of the two O-ring grooves 5. Both the O-ring 6 and the sealing gasket 9 are made of rubber, having good ductility and corrosion resistance. The O-ring grooves 5 are formed outside one end of the first connector 3 and the second connector 4 located inside the split body. After the O-ring 6 is installed inside the O-ring groove 5, the O-ring 6 simultaneously sleeves outside the first connector 3 and the second connector 4 to seal the gap between the first connector 3 and the second connector 4 and the valve body 1, improving the sealing effect between the first connector 3 and the second connector 4 and the valve body 1.

[0023] The inner wall of the valve body 1 is rotatably connected to the outer surface of the valve core 2. A through hole 7 is formed inside the valve core 2. By rotating the valve core 2, the orientation of the through hole 7 is changed. When the orientation of the through hole 7 is aligned with the first connector 3 and the second connector 4, the flowing medium passes through the inside of the two-way safety valve. When the flowing medium does not need to pass through, by rotating the valve core 2 to change the orientation of the through hole 7, the orientation of the through hole 7 is not aligned with the first connector 3 and the second connector 4, thus blocking the first connector 3 and the second connector 4, and the flowing medium cannot pass through the inside of the two-way safety valve.

[0024] On the inner side of the valve body 1, a sealing groove 8 is provided. The inner wall of the sealing groove 8 is connected with a sealing gasket 9. At the same time, the sealing gasket 9 is rotatably connected with the outer surface of the valve core 2. Through the sealing groove 8, the valve body 1 has a space for accommodating the sealing gasket 9. When the sealing gasket 9 is squeezed, the stability of the sealing gasket 9 is maintained through the sealing groove 8. The outer surface of the sealing gasket 9 contacts the pressing piece 10. The outer surface of the valve body 1 is connected with a cover plate 11. The outer surface of the cover plate 11 contacts the outer surface of the pressing piece 10. The pressing piece 10 is pushed to move its position through the cover plate 11, providing power for the pressing piece 10 to squeeze the sealing gasket 9. One end of the valve core 2 located outside the valve body 1 is provided with a direction groove 16, and the direction groove 16 is in the same direction as the through hole 7. Whether the two-way safety valve is closed or opened is judged from the outside of the valve body 1 through the orientation of the direction groove 16. When the direction groove 16 is vertical, it is in the open state. When the direction groove 16 is horizontal, it is in the closed state.

[0025] One end of the valve core 2 located outside the valve body 1 is connected with a handle 12, providing power for the rotation of the valve core 2 through the handle 12. One end of the valve core 2 located outside the valve body 1 is connected with a square block 13. The outer surface of the square block 13 is connected with the inner wall of the handle 12. One end of the handle 12 is connected with a positioning block 14. The valve core 2 is convenient to receive the power of the handle 12 through the square block 13, and a mutual clamping effect is formed between the square block 13 and the handle 12.

[0026] Two stoppers 15 are connected to the outer surface of the cover plate 11, and the two stoppers 15 form a ninety-degree angle. The outer surface of the stopper 15 contacts the outer surface of the positioning block 14. The rotation position of the valve core 2 is limited through the stopper 15, preventing the rotation angle of the valve core 2 from being too large or too small. One side of the positioning block 14 is connected with a clamping block 19. The outer surface of the clamping block 19 contacts the outer surface of the positioning block 14. When the handle 12 rotates and drives the positioning block 14 to contact the stopper 15, the positioning block 14 simultaneously drives the clamping block 19 to contact the stopper 15, improving the stability of the handle 12.

[0027] Threaded holes 17 are provided on the inner side of the valve body 1, and connection holes 18 are provided on the inner side of the cover plate 11, and the connection holes 18 are adapted to the threaded holes 17. There are four threaded holes 17 and connection holes 18, respectively located in four directions. The cover plate 11 is tightly in contact with the valve body 1 through bolts passing through the connection holes 18 and then connecting with the threaded holes 17 to maintain the stability of the valve core 2. While the bolts drive the cover plate 11 to be tightly in contact with the valve body 1, an extrusion force is formed on the pressing piece 10. The pressing piece 10 squeezes the sealing gasket 9 to be tightly in contact with the valve core 2, sealing the gap between the valve core 2 and the valve body 1.

[0028] It should be noted that in actual use of this device, first connect the first connector 3 and the second connector 4 to the valve body 1 during use, then place the O-ring 6 inside the O-ring groove 5, then insert the valve core 2 into the valve body 1, next place the gasket 9 into the sealing groove 8, then place the pressing piece 10 into the sealing groove 8 to contact the gasket 9, then connect the cover plate 11 to the valve body 1. When installing the cover plate 11, determine the direction of the stop block 15 and keep the correct orientation of the stop block 15, and then connect the handle 12 to the valve core 2.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Two-way safety valve, comprising a valve body (1) and a valve core (2), characterized in that: A first connector (3) is connected to the top end of the valve body (1), a second connector (4) is connected to the bottom end of the valve body (1), both the first connector (3) and the second connector (4) are in communication with the interior of the valve body (1), two O-ring grooves (5) are formed in the wall of the valve body (1), O-ring gaskets (6) are connected to the inner walls of the two O-ring grooves (5), the inner wall of the valve body (1) is rotatably connected to the outer surface of the valve core (2), a through hole (7) is formed in the inner side of the valve core (2), a sealing groove (8) is formed in the inner side of the valve body (1), a sealing gasket (9) is connected to the inner wall of the sealing groove (8), and at the same time the sealing gasket (9) is rotatably connected to the outer surface of the valve core (2), the outer surface of the sealing gasket (9) is in contact with a pressing piece (10), a cover plate (11) is connected to the outer surface of the valve body (1), the outer surface of the cover plate (11) is in contact with the outer surface of the pressing piece (10), and a handle (12) is connected to one end of the valve core (2) located outside the valve body (1).

2. The two-way safety valve according to claim 1, characterized in that: A square block (13) is connected to one end of the valve core (2) located outside the valve body (1), the outer surface of the square block (13) is connected to the inner wall of the handle (12), and a positioning block (14) is connected to one end of the handle (12).

3. The two-way safety valve according to claim 1, characterized in that: Two stoppers (15) are connected to the outer surface of the cover plate (11), and the two stoppers (15) form a right angle. The outer surface of the stopper (15) is in contact with the outer surface of the positioning block (14).

4. The two-way safety valve according to claim 3, characterized in that: A clamping block (19) is connected to one side of the positioning block (14), and the outer surface of the clamping block (19) is in contact with the outer surface of the positioning block (14).

5. The two-way safety valve according to claim 1, wherein: A direction groove (16) is formed in one end of the valve core (2) located outside the valve body (1), and the direction groove (16) is in the same direction as the through hole (7).

6. The two-way safety valve according to claim 1, characterized in that: A threaded hole (17) is formed in the inner side of the valve body (1), a connection hole (18) is formed in the inner side of the cover plate (11), and the connection hole (18) is adapted to the threaded hole (17).

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