High-safety double-core valve capable of controlling discharge direction

Abstract

The high-safety double-core valve capable of controlling the discharging direction comprises a valve body, valve cavities are formed in the two ends of the inner side of the valve body correspondingly, and a first ball body and a second ball body are movably arranged on the inner sides of the two valve cavities correspondingly; a first single-piston valve seat is movably arranged at one end of the inner side of one valve cavity, a reverse single-piston valve seat is movably arranged at the other end of the inner side of one valve cavity, and the first single-piston valve seat and the reverse single-piston valve seat are located on the two sides of the first ball. According to the high-safety double-core valve for controlling the discharge direction, a first ball body and a second ball body are matched with a first single-piston valve seat, a reverse single-piston valve seat, a second single-piston valve seat, a double-piston valve seat and an elastic element; when the pressure of an internal medium is continuously increased due to factors such as temperature and the medium, the pressure can be relieved towards a specified pressure relief direction, and the problems of no pressure or increase of the pressure of a low-pressure side, heavy economic loss and even harm to personnel safety are avoided.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a high-safety double-core valve for controlling a discharge direction. Background Art

[0002] In industrial fluid control systems, valves are key components, and their performance and reliability are directly related to the safety, stability and efficiency of the entire system. With the continuous advancement of valve technology and the widening of application areas, from simple water supply and drainage systems to complex petrochemical, electric power, pharmaceutical and other industries, the functional requirements and performance indicators of valves are also constantly improving, especially in equipment with limited space or compact design. Traditional single-core valves can no longer meet the needs of efficiency and integration, which has prompted the birth and development of dual-core valve technology. Dual-core valves integrate two independent valve cores in the same valve body, which not only optimizes the spatial layout, but also enhances the ability of flow control and medium isolation.

[0003] The dual-core valves currently on the market have the function of automatically balancing the valve cavity pressure to the pipeline system through the medium's own force. This innovation has alleviated the space pressure and operation complexity to a certain extent, but it still has limitations. Especially under specific working conditions, customers often need to have clear requirements for the pressure relief direction to ensure that the system pressure is reasonably distributed and avoid equipment damage, production interruption and even safety accidents caused by unexpected pressure increase on the no-pressure or low-pressure side. Therefore, how to develop a valve product that can maintain the space optimization advantage of dual-core valves and flexibly meet the needs of specific pressure relief directions has become a key issue that needs to be urgently solved in the current valve technology field.

[0004] Therefore, it is necessary to propose a high-safety dual-core valve that controls the discharge direction to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-safety dual-core valve for controlling the discharge direction, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-safety double-core valve for controlling the discharge direction comprises a valve body, both ends of the inner side of the valve body are provided with valve cavities, and a first ball and a second ball are movably provided inside the two valve cavities respectively;

[0008] A first single-piston valve seat is movably provided at one end of the inner side of one valve cavity, and a reverse single-piston valve seat is movably provided at the other end, and the first single-piston valve seat and the reverse single-piston valve seat are located on both sides of a first sphere, and the first single-piston valve seat and the reverse single-piston valve seat can be displaced in a direction away from the first sphere. A second single-piston valve seat is movably provided at one end of the inner side of the other valve cavity close to the reverse single-piston valve seat, and a double-piston valve seat is movably provided at one end away from the reverse single-piston valve seat, and the second single-piston valve seat can be displaced in a direction away from the second sphere, and the double-piston valve seat cannot be displaced to both sides.

[0009] Preferably, an elastic element is provided between the outer side of one end of the first single-piston valve seat, the reverse single-piston valve seat, the second single-piston valve seat and the double-piston valve seat and the inner wall of one end of the inner side of the valve cavity.

[0010] Preferably, the elastic element is a spring.

[0011] Preferably, the elastic elements on the outer sides of the first single-piston valve seat and the reverse single-piston valve seat are both arranged on the side facing away from the first sphere, so that the elastic elements can be compressed when the first single-piston valve seat and the reverse single-piston valve seat are displaced in the direction facing away from the first sphere;

[0012] The elastic element on the outer side of the second single-piston valve seat is located on the side facing away from the second sphere, so that the elastic element can be compressed when the second single-piston valve seat is displaced in a direction facing away from the second sphere.

[0013] Preferably, the outer sides of the first single-piston valve seat, the reverse single-piston valve seat, the second single-piston valve seat and the double-piston valve seat are all provided with second installation recesses, and the inner sides of the second installation recesses are provided with graphite packings that movably seal with the inner wall of the valve cavity.

[0014] Preferably, the outer sides of the first single-piston valve seat, the reverse single-piston valve seat, the second single-piston valve seat and the double-piston valve seat are all provided with a first mounting recess, and the inner side of the first mounting recess is provided with an O-ring that movably seals with the inner wall of the valve cavity.

[0015] Preferably, the top two ends of the valve body are respectively provided with a first valve stem and a second valve stem corresponding to the first sphere and the second sphere, the first valve stem is used to drive the first sphere to rotate, and the second valve stem is used to drive the second sphere to rotate;

[0016] The two ends of the bottom of the valve body are respectively provided with a first base frame and a second base frame corresponding to the first sphere and the second sphere. The bottom of the first sphere is rotatably connected to the upper end of the first base frame, and the bottom of the second sphere is rotatably connected to the upper end of the second base frame.

[0017] Preferably, the first valve cover, the second valve cover, the first sphere, the second sphere, the first single-piston valve seat, the reverse single-piston valve seat, the second single-piston valve seat, and the double-piston valve seat are all provided with corresponding channels for passing the medium.

[0018] Compared with the prior art, the present invention provides a high-safety dual-core valve for controlling the discharge direction, which has the following beneficial effects:

[0019] The high-safety dual-core valve for controlling the discharge direction can discharge pressure in a designated pressure relief direction when the pressure of the internal medium continues to increase due to factors such as temperature and the medium itself, by matching the first ball, the second ball with the first single-piston valve seat, the reverse single-piston valve seat, the second single-piston valve seat, the dual-piston valve seat and the elastic element, thereby avoiding problems such as increased pressure on the no-pressure or low-pressure side, significant economic losses, and even endangering personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0022] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle.

[0023] In the figure: 1, valve body; 2, first valve cover; 3, second valve cover; 4, first valve stem; 5, second valve stem; 6, first base frame; 7, second base frame; 8, graphite packing; 9, first sphere; 10, second sphere; 11, first single-piston valve seat; 12, reverse single-piston valve seat; 13, second single-piston valve seat; 14, double-piston valve seat; 15, first port; 16, second port; 17, valve cavity; 18, elastic element; 19, first mounting recess; 20, O-ring; 21, second mounting recess; 22, channel. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] like Figure 1-3As shown, a high-safety double-core valve for controlling the discharge direction comprises a valve body 1, both ends of the inner side of the valve body 1 are provided with valve cavities 17, a first ball 9 and a second ball 10 are movably provided inside the two valve cavities 17, a first valve cover 2 is provided at one end of the valve body 1 close to the first ball 9, a second valve cover 3 is provided at one end of the valve body 1 close to the second ball 10, and an end of the first valve cover 2 away from the valve body 1 is a first port 15, and an end of the second valve cover 3 away from the valve body 1 is a second port 16, a first valve stem 4 and a second valve stem 5 corresponding to the first ball 9 and the second ball 10 are provided at two ends of the top of the valve body 1, respectively, the first valve stem 4 is used to drive the first ball 9 to rotate, and the second valve stem 5 is used to drive the second ball 10 to rotate, and a first base frame 6 and a second base frame 7 corresponding to the first ball 9 and the second ball 10 are provided at two ends of the bottom of the valve body 1, respectively, the bottom of the first ball 9 is rotatably connected to the upper end of the first base frame 6, and the bottom of the second ball 10 is rotatably connected to the upper end of the second base frame 7;

[0026] A first single-piston valve seat 11 is movably provided at one end of the inner side of one valve cavity 17, and a reverse single-piston valve seat 12 is movably provided at the other end, and the first single-piston valve seat 11 and the reverse single-piston valve seat 12 are located on both sides of the first sphere 9, and the first single-piston valve seat 11 and the reverse single-piston valve seat 12 can be displaced in a direction away from the first sphere 9, and a second single-piston valve seat 13 is movably provided at one end of the inner side of the other valve cavity 17 close to the reverse single-piston valve seat 12, and a double-piston valve seat 14 is movably provided at one end away from the reverse single-piston valve seat 12, the second single-piston valve seat 13 can be displaced in a direction away from the second sphere 10, and the double-piston valve seat 14 cannot be displaced to both sides. In order to facilitate resetting and ensure sealing, the first single-piston valve seat 11, the reverse single-piston valve seat 12, the second single-piston valve seat 13, and the double-piston valve seat 14 are An elastic element 18 is arranged between the outer side of one end and the inner wall of one end inside the valve cavity 17. The elastic element 18 is preferably a spring. The elastic elements 18 on the outer sides of the first single-piston valve seat 11 and the reverse single-piston valve seat 12 are arranged on the side facing away from the first sphere 9, so that the elastic element 18 can be compressed when the first single-piston valve seat 11 and the reverse single-piston valve seat 12 are displaced in the direction facing away from the first sphere 9. The elastic element 18 on the outer side of the second single-piston valve seat 13 is located on the side facing away from the second sphere 10, so that the elastic element 18 can be compressed when the second single-piston valve seat 13 is displaced in the direction facing away from the second sphere 10. The first sphere 9, the second sphere 10, the first single-piston valve seat 11, the reverse single-piston valve seat 12, the second single-piston valve seat 13, and the double-piston valve seat 14 are all provided with corresponding channels 22 for passing the medium.

[0027] In order to improve the sealing performance, a second mounting recess 21 is provided on the outer side of the first single-piston valve seat 11, the reverse single-piston valve seat 12, the second single-piston valve seat 13 and the double-piston valve seat 14, and a graphite packing 8 that is movably sealed with the inner wall of the valve cavity 17 is provided on the inner side of the second mounting recess 21. A first mounting recess 19 is provided on the outer side of the first single-piston valve seat 11, the reverse single-piston valve seat 12, the second single-piston valve seat 13 and the double-piston valve seat 14, and an O-ring 20 that is movably sealed with the inner wall of the valve cavity 17 is provided on the inner side of the first mounting recess 19.

[0028] When in use, after the first sphere 9 and the second sphere 10 are all closed, if the medium enters from the first port 15, the first single-piston valve seat 11 is pre-tightened by the elastic element 18 to fit with the first sphere 9 to block the medium. If the medium enters from the second port 16, the double-piston valve seat 14 is pre-tightened by the elastic element 18 to fit with the second sphere 10 to block the medium. When there is medium in the valve cavity 17 close to the second port 16 and the pressure increases due to factors such as temperature and the medium itself, the valve cavity 17 close to the second port 16 cannot move because the right side of the second sphere 10 is the channel 22 and the left side is The second single-piston valve seat 13 can be displaced in the direction away from the second sphere 10, and the overpressure medium in the valve cavity 17 close to the second port 16 will be discharged to the reverse single-piston valve seat 12 and the channel 22 on the second single-piston valve seat 13 through the second single-piston valve seat 13. At this time, the overpressure medium in the channel 22 will be discharged to the valve cavity 17 close to the first port 15 by pushing the reverse single-piston valve seat 12. The pressure of the valve cavity 17 close to the first port 15 continues to increase, and the overpressure medium in the valve cavity 17 is discharged to the channel 22 at the first port 15 by pushing the first single-piston valve seat 11.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-safety dual-core valve for controlling the discharge direction, comprising a valve body (1), characterized in that: Both ends of the inner side of the valve body (1) are provided with valve cavities (17), and a first sphere (9) and a second sphere (10) are movably provided inside the two valve cavities (17) respectively; A first single-piston valve seat (11) is movably provided at one end of the inner side of one valve cavity (17), and a reverse single-piston valve seat (12) is movably provided at the other end, and the first single-piston valve seat (11) and the reverse single-piston valve seat (12) are located on both sides of the first sphere (9), and the first single-piston valve seat (11) and the reverse single-piston valve seat (12) can be displaced in a direction away from the first sphere (9); a second single-piston valve seat (13) is movably provided at one end of the inner side of the other valve cavity (17) close to the reverse single-piston valve seat (12), and a double-piston valve seat (14) is movably provided at one end away from the reverse single-piston valve seat (12); the second single-piston valve seat (13) can be displaced in a direction away from the second sphere (10), and the double-piston valve seat (14) cannot be displaced to both sides.

2. A high-safety dual-core valve for controlling discharge direction according to claim 1, characterized in that: An elastic element (18) is provided between the outer side of one end of the first single-piston valve seat (11), the reverse single-piston valve seat (12), the second single-piston valve seat (13), and the double-piston valve seat (14) and the inner wall of one end of the inner side of the valve cavity (17).

3. A high-safety dual-core valve for controlling discharge direction according to claim 2, characterized in that: The elastic element (18) is a spring.

4. A high-safety dual-core valve for controlling discharge direction according to claim 3, characterized in that: The elastic elements (18) on the outside of the first single-piston valve seat (11) and the reverse single-piston valve seat (12) are both arranged on the side facing away from the first sphere (9), so that the elastic elements (18) can be compressed when the first single-piston valve seat (11) and the reverse single-piston valve seat (12) are displaced in a direction facing away from the first sphere (9); The elastic element (18) outside the second single-piston valve seat (13) is located on the side facing away from the second sphere (10), so that the elastic element (18) can be compressed when the second single-piston valve seat (13) moves in a direction facing away from the second sphere (10).

5. A high-safety dual-core valve for controlling discharge direction according to claim 1, characterized in that: The first single-piston valve seat (11), the reverse single-piston valve seat (12), the second single-piston valve seat (13), and the double-piston valve seat (14) are all provided with a second mounting recess (21) on their outer sides, and a graphite packing (8) movably sealingly matched with the inner wall of the valve cavity (17) is provided on the inner side of the second mounting recess (21).

6. A high-safety dual-core valve for controlling discharge direction according to claim 1, characterized in that: The first single-piston valve seat (11), the reverse single-piston valve seat (12), the second single-piston valve seat (13), and the double-piston valve seat (14) are all provided with a first mounting recess (19) on their outer sides, and an O-ring (20) is provided on the inner side of the first mounting recess (19) for movably sealingly cooperating with the inner wall of the valve cavity (17).

7. A high-safety dual-core valve for controlling discharge direction according to any one of claims 1 to 6, characterized in that: A first valve stem (4) and a second valve stem (5) corresponding to the first sphere (9) and the second sphere (10) are respectively provided at the top two ends of the valve body (1); the first valve stem (4) is used to drive the first sphere (9) to rotate, and the second valve stem (5) is used to drive the second sphere (10) to rotate; A first base frame (6) and a second base frame (7) corresponding to the first sphere (9) and the second sphere (10) are respectively provided at the two ends of the bottom of the valve body (1); the bottom of the first sphere (9) is rotatably connected to the upper end of the first base frame (6), and the bottom of the second sphere (10) is rotatably connected to the upper end of the second base frame (7).

8. A high-safety dual-core valve for controlling discharge direction according to claim 1, characterized in that: The first valve cover (2), the second valve cover (3), the first sphere (9), the second sphere (10), the first single-piston valve seat (11), the reverse single-piston valve seat (12), the second single-piston valve seat (13), and the double-piston valve seat (14) are all provided with corresponding channels (22) for passing a medium.

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