A multi-stage sealed hydrogen balloon valve

Abstract

The present invention relates to the technical field of ball valves, and discloses a multi-stage sealed hydrogen ball valve, which includes a valve seat, a valve core and a valve stem. The valve core is arranged inside the valve seat. Among them, a first support is fixed on the valve seat, a second support is arranged above the first support, and the first support and the second support are connected by a plurality of first connecting rods. A third support is arranged above the second support, and the second support and the third support are connected by a plurality of second connecting rods. Through the cable, the sliding plug and the annular bladder linkage mechanism, the present invention actively controls the separation of the sealing seat and the valve core before the valve core rotates, eliminates the frictional loss generated by direct contact during the opening and closing process of the traditional hard sealing structure. The sealing seat only contacts when the valve is closed, and there is no relative movement during the daily adjustment process, significantly prolonging the service life of the sealing component.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and particularly to a multi-stage sealed hydrogen ball valve. Background Art

[0002] A sealed hydrogen ball valve refers to a ball valve used in a hydrogen pipeline, which is mainly used for cutting, distributing, and changing the flow direction of hydrogen in the hydrogen pipeline.

[0003] After retrieval, a Chinese patent with the publication number CN112112998A discloses a hard-sealed ball valve for high-temperature and high-pressure hydrogen, including a main valve body and a right valve body. A valve cavity is provided in the main valve body, a valve ball and a valve seat are provided in the valve cavity, valve seat positioning grooves are provided on the inner wall surfaces of the valve cavity and the right valve body, and the valve seat is installed in the aligned valve seat positioning grooves; a valve rod through hole is provided at a position above the valve cavity in the main valve body, a valve rod is inserted through the valve rod through hole, and a middle valve body sealing mechanism is provided between the main valve body and the right valve body; in addition, a Chinese patent with the publication number CN217056425U discloses a double-sealed compensated ball valve seat, including a ball seat body, a soft seal body, a hard seal body, a hole retaining ring, a compression spring, and a sealing ring; a soft seal body and a hard seal body are movably provided in the ball seat body, and the compression spring pushes the soft seal body and the hard seal body against the valve sphere; the soft seal body is sleeved on the hard seal body, a sealing ring is provided on the outer axial surface of the soft seal body for axial moving sealing cooperation with the ball seat body, and a first sealing spherical surface adapted to the valve sphere is provided on the soft seal.

[0004] For the sealing structures of the above two ball valves, hard-sealed and soft-sealed forms are respectively adopted, and these two forms are also the most common sealing performances. However, for the hard-sealed structure, since the valve body and the valve seat are in direct contact and bear fluid pressure and medium erosion, wear is likely to occur. This wear will gradually accumulate during long-term use, ultimately leading to a decline in the valve's sealing performance and leakage. For the soft-sealed structure, although the contact area between its sealing ring and the valve seat is large, the sealing effect is good, and the wear is relatively small, the material of the sealing ring is usually sensitive to temperature. In a high-temperature environment, the sealing ring is prone to aging, hardening, or deformation, thereby reducing its elasticity and sealing performance.

[0005] Therefore, it is necessary to design a multi-stage sealed hydrogen ball valve to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to propose a multi-stage sealed hydrogen ball valve to solve the deficiencies existing in the prior art.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A multi-stage sealed hydrogen balloon valve, comprising a valve seat, a valve core and a valve stem, wherein the valve core is arranged inside the valve seat;

[0009] Wherein, a first support is fixed on the valve seat, a second support is arranged above the first support, and the first support and the second support are connected by a plurality of first connecting rods. A third support is arranged above the second support, and the second support and the third support are connected by a plurality of second connecting rods. The valve stem is rotatably assembled on the first support. One end of the valve stem is fixedly connected to the valve core, and the other end of the valve stem is located outside the valve seat and is provided with an installation groove, and the cross section of the installation groove is in a rectangular structure;

[0010] Wherein, a sealing unit is arranged inside the valve seat, the sealing unit is composed of two sealing components, and the two sealing components are respectively located on both sides of the valve core;

[0011] Wherein, a rotating component is arranged on the third support, a control component is arranged on the second support, and an execution component is arranged on the valve seat.

[0012] As a preferred technical solution of the present invention, each of the sealing components includes an end seat, an annular bladder and a sealing seat. The end seat is fixed inside the valve seat. One end of the annular bladder is connected to the end seat, and the other end is connected to the sealing seat. Water is stored inside the annular bladder. A sealing surface adapted to the valve core is arranged on the sealing seat, and the sealing surface is attached to the outer surface of the valve core.

[0013] As a preferred technical solution of the present invention, the rotating component includes a rotating rod, a fixing block, a collar and a rotating ring. The rotating rod is slidably arranged on the third support. The fixing block is fixed at the bottom end of the rotating rod, and the cross section of the fixing block is in a rectangular structure. The collar is fixedly sleeved on the rotating rod. The rotating ring is rotatably installed on the second support, and the collar and the rotating ring are connected by a first spring.

[0014] As a preferred technical solution of the present invention, the control component includes a rotating shaft, a winding wheel and a wire. The rotating shaft is rotatably installed on the second support. A through hole is arranged on the rotating shaft, and the cross section of the through hole is in a rectangular structure. The winding wheel is fixedly sleeved on the rotating shaft. One end of the wire is fixedly connected to the winding wheel.

[0015] As a preferred technical solution of the present invention, the execution component includes a fixed box, a sliding plug and two connecting pipes. The fixed box is fixed on the surface of the valve seat through two cross bars. The sliding plug is hermetically and slidably connected inside the fixed box, and is connected to the inner surface of the fixed box through a second spring. One end of each of the two connecting pipes is communicated with the fixed box, and the other ends of the two connecting pipes are respectively communicated with two annular sacs. A fine hole is opened at one end of the fixed box. The end of the wire rope away from the winding wheel passes through the fine hole and is connected to the sliding plug.

[0016] As a preferred technical solution of the present invention, the valve rod, the rotating rod and the rotating shaft are coaxially arranged.

[0017] As a preferred technical solution of the present invention, the shape of the fixed block is adapted to the shape of the installation groove.

[0018] As a preferred technical solution of the present invention, a sealing ring is fixed on the side surface of each end seat. Through holes are opened on the two sealing rings. The two sealing rings respectively cover the two annular sacs. The sealing ring is made of a water-swellable water-stop strip. A puncture component is arranged on the valve seat.

[0019] As a preferred technical solution of the present invention, the puncture component includes a cross plate and two insertion rods. Two through holes are opened on the valve seat. The two insertion rods are respectively inserted into the two through holes. The two insertion rods are respectively arranged opposite to the two through holes. The end position of each insertion rod is in a tip-shaped structure. The ends of the two insertion rods away from the valve core extend to the outside of the valve seat and are respectively fixed to both ends of the cross plate. The cross plate is connected to the valve seat through a third spring.

[0020] As a preferred technical solution of the present invention, a fixed frame is fixed on the side surface of the cross plate. A fixed rod is fixed on the valve seat. A clamping plate is rotatably installed on the fixed rod, and the clamping plate is arranged opposite to the fixed frame.

[0021] The present invention has the following beneficial effects:

[0022] 1. Through the linkage mechanism of the wire rope, the sliding plug and the annular sac, the separation of the sealing seat and the valve core is actively controlled before the valve core rotates, eliminating the frictional loss generated by direct contact during the opening and closing process of the traditional hard-sealing structure. The sealing seat only contacts when the valve is closed, and there is no relative movement during the daily adjustment process, significantly prolonging the service life of the sealing component;

[0023] 2. When the seal between the valve core and the two seal seats fails due to external factors, different from the prior art which uses grease injection for plugging, the staff of the present invention can achieve rapid sealing of the ball valve through the puncture assembly. Compared with the prior art which uses grease injection for plugging, the present invention only requires simple operations such as the staff rotating the clamping plate and pushing the cross plate to achieve rapid sealing, without complex grease injection equipment and operation processes;

[0024] 3. The outer periphery of the wire winding wheel contacts with four first connecting rods and the outer peripheral surface is provided with anti-slip lines, increasing the friction force so that the wire winding wheel cannot rotate when not under force. In this way, only when the staff manually controls the rotation of the rotating shaft will the wire winding wheel rotate. Furthermore, when the fixing block disengages from the through hole, the wire winding wheel will not rotate, and the sliding plug will not reset under the elastic force of the second spring. The position of the sliding plug is fixed, and the two seal seats cannot automatically reset. This can ensure that the valve core is always separated from the two seal seats during rotation, effectively avoiding the adverse effects that may be brought by the accidental contact between the valve core and the seal seats, ensuring the controllability and stability of the ball valve operation, and guaranteeing the normal operation of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a multi-stage sealed hydrogen ball valve proposed by the present invention;

[0026] Figure 2 is an exploded view of a multi-stage sealed hydrogen ball valve proposed by the present invention Figure 1 ;

[0027] Figure 3 is an exploded view of a multi-stage sealed hydrogen ball valve proposed by the present invention Figure 2 ;

[0028] Figure 4 is a schematic structural diagram of the valve core and the sealing unit;

[0029] Figure 5 is a cross-sectional structural diagram of the valve core and the sealing unit;

[0030] Figure 6 is Figure 5 an enlarged view of the structure at A of;

[0031] Figure 7 is a schematic structural diagram of the puncture assembly Figure 1 ;

[0032] Figure 8 is a schematic structural diagram of the puncture assembly Figure 2 ;

[0033] Figure 9 is a schematic structural diagram of the execution assembly.

[0034] In the figure: 1, valve seat; 101, first support; 102, second support; 103, third support; 104, first connecting rod; 105, second connecting rod; 2, valve core; 3, valve stem; 301, installation groove; 41, end seat; 42, annular bladder; 43, sealing seat; 51, rotating rod; 52, fixing block; 53, collar; 54, rotating ring; 55, first spring; 61, rotating shaft; 62, through port; 63, winding wheel; 64, pull wire; 71, fixing box; 72, sliding plug; 73, second spring; 74, connecting pipe; 81, sealing ring; 82, through hole; 91, cross plate; 92, inserting rod; 93, third spring; 94, fixing bracket; 95, fixing rod; 96, clamping plate. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0036] Referring to Figure 1-9 , a multi-stage sealed hydrogen balloon valve includes a valve seat 1, a valve core 2 and a valve stem 3. The valve core 2 is arranged inside the valve seat 1. A first support 101 is fixed on the valve seat 1. A second support 102 is arranged above the first support 101, and the first support 101 and the second support 102 are connected by a plurality of first connecting rods 104. A third support 103 is arranged above the second support 102, and the second support 102 and the third support 103 are connected by a plurality of second connecting rods 105. The valve stem 3 is rotatably assembled on the first support 101. One end of the valve stem 3 is fixedly connected to the valve core 2, and the other end of the valve stem 3 is located outside the valve seat 1 and is provided with an installation groove 301. The cross section of the installation groove 301 is in a rectangular structure;

[0037] A sealing unit is arranged inside the valve seat 1. The sealing unit is composed of two sealing components. The two sealing components are respectively located on both sides of the valve core 2. Each sealing component includes an end seat 41, an annular bladder 42 and a sealing seat 43. The end seat 41 is fixed inside the valve seat 1. One end of the annular bladder 42 is connected to the end seat 41, and the other end is connected to the sealing seat 43. Water is stored inside the annular bladder 42. A sealing surface adapted to the valve core 2 is arranged on the sealing seat 43, and this sealing surface is in contact with the outer surface of the valve core 2. For the sealing unit, under the elastic force of the third spring 93, the sliding plug 72 always has a tendency to press water into the two annular bladders 42. Under the action of water pressure, the two annular bladders 42 can apply force to the two sealing seats 43, so that the two sealing seats 43 both tightly press the valve core 2, realizing the hard seal between the valve core 2 and the two sealing seats 43. In this case, the overall sealing performance of the valve is guaranteed;

[0038] A rotating assembly is provided on the third support 103, a control assembly is provided on the second support 102, and an actuating assembly is provided on the valve seat 1. The rotating assembly includes a rotating rod 51, a fixed block 52, a collar 53 and a rotating ring 54. The rotating rod 51 is slidably arranged on the third support 103. The fixed block 52 is fixed to the bottom end of the rotating rod 51, and the cross-section of the fixed block 52 is in a rectangular structure. The shape of the fixed block 52 is adapted to the shape of the installation groove 301. The collar 53 is fixedly sleeved on the rotating rod 51. The rotating ring 54 is rotatably installed on the second support 102. The collar 53 and the rotating ring 54 are connected by a first spring 55. The control assembly includes a rotating shaft 61, a winding wheel 63 and a pulling wire 64. The rotating shaft 61 is rotatably installed on the second support 102. The valve rod 3, the rotating rod 51 and the rotating shaft 61 are coaxially arranged. A through hole 62 is formed in the rotating shaft 61. The cross-section of the through hole 62 is in a rectangular structure. The winding wheel 63 is fixedly sleeved on the rotating shaft 61. One end of the pulling wire 64 is fixedly connected to the winding wheel 63. When the rotating rod 51 rotates, it drives the fixed block 52 to rotate. Since the cross-sections of the fixed block 52 and the through hole 62 are both in rectangular structures, the fixed block 52 can drive the rotating shaft 61 to rotate, and the winding wheel 63 on the rotating shaft 61 rotates accordingly. The winding wheel 63 can wind up the pulling wire 64 when rotating;

[0039] The actuating assembly includes a fixed box 71, a sliding plug 72 and two communicating pipes 74. The fixed box 71 is fixed on the surface of the valve seat 1 by two cross bars. The sliding plug 72 is hermetically and slidably connected inside the fixed box 71, and the sliding plug 72 and the inner surface of the fixed box 71 are connected by a second spring 73. One end of each of the two communicating pipes 74 is communicated with the fixed box 71, and the other ends of the two communicating pipes 74 are respectively communicated with the two annular bladders 42. A fine hole is formed at one end of the fixed box 71. The end of the pulling wire 64 away from the winding wheel 63 passes through the fine hole and is connected to the sliding plug 72. When the pulling wire 64 is wound up, it can pull the sliding plug 72 to move. The sliding plug 72 can draw the water in the two annular bladders 42 through the two communicating pipes 74 during the moving process and draw the water in the two annular bladders 42 into the inside of the fixed box 71. When the water flow inside the annular bladder 42 is drawn out, the annular bladder 42 can contract and drive the sealing seat 43 to move. Therefore, when the staff rotates the rotating rod 51, the two annular bladders 42 can contract synchronously, driving the two sealing seats 43 to move away from each other, so that the two sealing seats 43 are separated from the valve core 2. Therefore, the valve core 2 will not contact the two sealing seats 43 when rotating. This design can avoid the wear between the valve core 2 and the two sealing seats 43. By designing the movable sealing seat 43, the wear situation can be effectively avoided, ensuring the sealing performance of the ball valve;

[0040] A sealing ring 81 is fixed to the side of each end seat 41. Through holes 82 are formed in both sealing rings 81. The two sealing rings 81 respectively cover the two annular sacs 42. The sealing ring 81 is made of a water-swellable water-stop strip. A puncturing assembly is arranged on the valve seat 1. The puncturing assembly includes a cross plate 91 and two inserting rods 92. Two through openings are formed in the valve seat 1. The two inserting rods 92 are respectively inserted into the two through openings. The two inserting rods 92 are respectively arranged opposite to the two through holes 82. The end of each inserting rod 92 is in a pointed structure. The two inserting rods 92 extend to the outside of the valve seat 1 at the ends away from the valve core 2 and are respectively fixedly connected to both ends of the cross plate 91. The cross plate 91 and the valve seat 1 are connected by a third spring 93. A fixing frame 94 is fixed to the side of the cross plate 91. A fixing rod 95 is fixed to the valve seat 1. A clamping plate 96 is rotatably installed on the fixing rod 95, and the clamping plate 96 is arranged opposite to the fixing frame 94. When the ball valve sealing structure fails, the solution provided by the present invention can quickly and effectively avoid hydrogen leakage, has significant advantages, and the operation process is simple and efficient. The staff only needs to first rotate the clamping plate 96 to separate it from the fixing frame 94 to release the restriction on the cross plate 91, and then push the cross plate 91. The cross plate 91 will drive the two inserting rods 92 to move. The ends of the inserting rods 92 are in a pointed shape and can accurately pass through the through openings to pierce the annular sacs 42, so that the water in the annular sacs 42 flows out and flows to the sealing rings 81. The entire operation process does not require complex equipment and technology, and the staff can complete it quickly to timely respond to the sealing failure problem. The sealing effect is significantly reliable. The sealing ring 81 is made of a water-swellable water-stop strip, which is the key advantage of this design. The water-swellable rubber will produce 2 - 3 times of expansion deformation after contacting water, can fill all irregular surfaces, cavities and gaps inside the valve seat 1. At the same time, it will generate a huge contact pressure to form a tight seal and completely prevent leakage. When the two inserting rods 92 pierce the annular sacs 42 and the sealing rings 81 absorb the water flow and expand, they can quickly and effectively seal the valve seat 1 to prevent hydrogen leakage.

[0041] The specific working principle of the present invention is as follows:

[0042] When the multi-stage sealed hydrogen ball valve proposed by the present invention is in use, in the initial state, under the elastic force of the first spring 55, the fixed block 52 is located in the through port 62. At this time, the fixed block 52 can drive the rotating shaft 61 to rotate, but cannot drive the valve rod 3 to rotate. For the sealing unit, under the elastic force of the third spring 93, the sliding plug 72 always has a tendency to press the water flow into the two annular sacs 42. Under the action of the water pressure, the two annular sacs 42 can apply force to the two sealing seats 43, so that the two sealing seats 43 both tightly press the valve core 2 to realize the hard seal between the valve core 2 and the two sealing seats 43. In this case, the overall sealing performance of the valve is guaranteed;

[0043] When it is necessary to change the opening and closing state of the valve, the staff first rotates the handwheel on the rotating rod 51 to make the rotating rod 51 rotate. When the rotating rod 51 rotates, it drives the fixed block 52 to rotate. Since the cross-sections of the fixed block 52 and the through port 62 are both rectangular structures, the fixed block 52 can drive the rotating shaft 61 to rotate, and the winding wheel 63 on the rotating shaft 61 rotates accordingly. When the winding wheel 63 rotates, it can wind up the pull wire 64, causing the pull wire 64 to pull the sliding plug 72 to move. During the movement of the sliding plug 72, it can draw the water in the two annular bladders 42 through the two connecting pipes 74 and pump the water in the two annular bladders 42 into the interior of the fixed box 71. When the water flow inside the annular bladder 42 is drawn out, the annular bladder 42 can contract and drive the sealing seat 43 to move. Therefore, when the staff rotates the rotating rod 51, the two annular bladders 42 can contract synchronously, driving the two sealing seats 43 to move away from each other, causing the two sealing seats 43 to separate from the valve core 2. Further, the staff presses down the rotating rod 51, causing the rotating rod 51 and the fixed block 52 to move downward until the fixed block 52 moves out of the through port 62. Further, the staff fine-tunes the angle of the fixed block 52 by rotating the rotating rod 51 until the fixed block 52 is aligned with the installation groove 301. When the fixed block 52 is aligned with the installation groove 301, the staff continues to press down the rotating rod 51, causing the fixed block 52 to be stuck into the installation groove 301;

[0044] When the fixed block 52 is stuck into the installation groove 301, the staff continues to rotate the rotating rod 51. Since the cross-sections of the fixed block 52 and the installation groove 301 are both rectangular structures and the side surface of the fixed block 52 is in contact with the groove wall of the installation groove 301, the fixed block 52 can drive the valve stem 3 to rotate, causing the valve stem 3 to drive the valve core 2 to rotate until the valve core 2 rotates 90°, thus realizing the adjustment of the opening and closing state of the ball valve. Since the two sealing seats 43 are both in a state of separation from the valve core 2, the valve core 2 will not come into contact with the two sealing seats 43 during rotation. This design can avoid wear between the valve core 2 and the two sealing seats 43. By designing the movable sealing seat 43, the wear situation can be effectively avoided, ensuring the sealing performance of the ball valve;

[0045] When the rotating rod 51 moves downward, the collar 53 on the rotating rod 51 moves accordingly and squeezes the first spring 55. After the valve core 2 rotates 90°, the staff stops applying the downward pressing force on the rotating rod 51. At this time, the rotating rod 51 will reset under the elastic force of the first spring 55 and drive the fixed block 52 to move upward, so that the fixed block 52 disengages from the installation groove 301. Further, the staff also fine-tunes the angle of the fixed block 52 by rotating the rotating rod 51 until the fixed block 52 rotates to a position directly facing the through port 62, so that the fixed block 52 slides back into the through port 62. After the fixed block 52 slides into the through port 62, the staff rotates the handwheel in the reverse direction, so that the rotating rod 51 rotates in the reverse direction. When the rotating rod 51 rotates in the reverse direction, it can drive the rotating shaft 61 to rotate in the reverse direction through the fixed block 52, so that the winding wheel 63 rotates in the reverse direction. When the winding wheel 63 rotates in the reverse direction, the winding wheel 63 can perform the action of releasing the pull wire 64, so that the pull wire 64 no longer applies a pulling force to the sliding plug 72. At this time, the sliding plug 72 will reset under the elastic force of the second spring 73 and press the water flow back into the two annular bladders 42 through the two communicating pipes 74. When the water flow enters the two annular bladders 42, the water flow can restore the two annular bladders 42, and then make the two sealing seats 43 approach each other and resume the state of pressing the valve core 2, so as to restore the sealing performance between the valve core 2 and the two sealing seats 43. Based on the above process, on the basis of adopting the hard-sealing form, this ball valve effectively solves the wear problem between the valve core 2 and the sealing seat 43;

[0046] It is worth mentioning that the outer circumference of the winding wheel 63 is in contact with the four first connecting rods 104, and the outer circumferential surface of the winding wheel 63 is provided with anti-slip lines, which makes the winding wheel 63 have a large frictional force with the four first connecting rods 104. Under the action of this frictional force, the winding wheel 63 cannot rotate under non-force conditions. Through this design, only when the staff manually controls the rotation of the rotating shaft 61 can the winding wheel 63 rotate. This makes it impossible for the winding wheel 63 to rotate when the fixed block 52 disengages from the through port 62, and the sliding plug 72 cannot reset under the elastic force of the second spring 73. When the position of the sliding plug 72 is fixed, the two sealing seats 43 cannot automatically reset, which can ensure that the valve core 2 is always in a separated state from the two sealing seats 43 during the rotation process;

[0047] The ball valve proposed by the present invention also has the function of rapid plugging. When the seal between the valve core 2 and the two seal seats 43 fails due to external factors, the solution of the prior art is generally to plug the ball valve by injecting grease to avoid continuous leakage of hydrogen. However, in the present invention, the staff can achieve rapid sealing of the ball valve through the puncture assembly. Specifically, when the sealing structure of the ball valve fails, the staff first rotates the clamping plate 96 to separate the clamping plate 96 from the fixing frame 94. Without the restriction of the clamping plate 96, the cross plate 91 can move. At this time, the staff pushes the cross plate 91 to drive the two insertion rods 92 to move. The two insertion rods 92 are respectively arranged opposite to the two through holes 82. Therefore, when the two insertion rods 92 move, they can respectively pass through the two through holes 82 and insert into the two annular bladders 42. Since the end of the insertion rod 92 is in a pointed structure, the insertion rod 92 can puncture the annular bladder 42 when it is inserted into the annular bladder 42. When the annular bladder 42 is punctured, the water inside the annular bladder 42 will flow out and flow onto the sealing ring 81, and finally be absorbed by the sealing ring 81. The sealing ring 81 is made of a water-swelling water-stop strip. The water-swelling rubber has characteristics and advantages compared with ordinary rubber. This kind of rubber produces 2-3 times of expansion deformation after contacting water and fills all irregular surfaces, cavities and gaps of the joint. At the same time, it generates a huge contact pressure to completely prevent leakage. In summary, when the two insertion rods 92 respectively puncture the two annular bladders 42, the two sealing rings 81 can absorb the water flow and expand, and fill the cavities and gaps inside the valve seat 1, realizing rapid and effective sealing of the valve seat 1 and avoiding the leakage of hydrogen when the ball valve seal fails.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A multi-stage sealed hydrogen ball valve, characterized in that: It includes a valve seat, a valve core and a valve stem, wherein the valve core is arranged inside the valve seat; Wherein, a first support is fixed on the valve seat, a second support is arranged above the first support, and the first support and the second support are connected by a plurality of first connecting rods, a third support is arranged above the second support, and the second support and the third support are connected by a plurality of second connecting rods, the valve stem is rotatably assembled on the first support, one end of the valve stem is fixedly connected to the valve core, and the other end of the valve stem is located outside the valve seat and is provided with a mounting groove, and the cross-section of the mounting groove is a rectangular structure; Wherein, a sealing unit is arranged inside the valve seat, and the sealing unit is composed of two sealing components, and the two sealing components are respectively located on both sides of the valve core, and each of the sealing components comprises an end seat, an annular capsule and a sealing seat, and the end seat is fixed inside the valve seat, one end of the annular capsule is connected to the end seat, and the other end is connected to the sealing seat, and water is accumulated inside the annular capsule, and a sealing surface adapted to the valve core is arranged on the sealing seat, and the sealing surface is in contact with the outer surface of the valve core; Wherein, the third support is provided with a rotating assembly, the second support is provided with a control assembly, and the valve seat is provided with an actuator assembly; A sealing ring is fixed on the side of each end seat, and a through hole is provided on the two sealing rings. The two sealing rings cover two annular bags respectively. The sealing ring is made of a water-swelling waterstop strip that expands when in contact with water. A puncture assembly is arranged on the valve seat, and the puncture assembly includes a cross plate and two plug rods. Two through holes are provided on the valve seat, and the two plug rods are respectively inserted in the two through holes. The two plug rods are respectively arranged opposite to the two through holes. The end position of each plug rod is a pointed structure. The ends of the two plug rods away from the valve core extend to the outside of the valve seat and are respectively fixedly connected to the two ends of the cross plate. The cross plate and the valve seat are connected by a third spring. A fixing frame is fixed on the side of the cross plate, and a fixing rod is fixed on the valve seat. A clamping plate is rotatably installed on the fixing rod, and the clamping plate is arranged opposite to the fixing frame.

2. A multi-stage sealed hydrogen ball valve according to claim 1, characterized in that: The rotating assembly includes a rotating rod, a fixed block, a collar and a rotating ring. The rotating rod is slidably arranged on a third support. The fixed block is fixed to the bottom end of the rotating rod, and the cross-section of the fixed block is a rectangular structure. The collar is fixedly sleeved on the rotating rod. The rotating ring is rotatably installed on the second support. The collar and the rotating ring are connected by a first spring.

3. A multi-stage sealed hydrogen ball valve according to claim 2, characterized in that: The control component includes a rotating shaft, a winding wheel and a pulling wire. The rotating shaft is rotatably mounted on the second support. A through opening is opened on the rotating shaft. The cross-section of the through opening is a rectangular structure. The winding wheel is fixedly sleeved on the rotating shaft, and one end of the pulling wire is fixedly connected to the winding wheel.

4. A multi-stage sealed hydrogen ball valve according to claim 3, characterized in that: The actuator assembly includes a fixed box, a sliding plug and two connecting pipes. The fixed box is fixed to the valve seat surface by two cross bars. The sliding plug is sealingly slidably connected to the inside of the fixed box, and the sliding plug is connected to the inner surface of the fixed box by a second spring. One end of the two connecting pipes is connected to the fixed box, and the other ends of the two connecting pipes are respectively connected to two annular bags. A fine hole is opened at one end of the fixed box, and the end of the pull wire away from the winding wheel passes through the fine hole and is connected to the sliding plug.

5. A multi-stage sealed hydrogen ball valve according to claim 4, characterized in that: The valve stem, the rotating rod and the rotating shaft are coaxially arranged.

6. A multi-stage sealed hydrogen ball valve according to claim 5, characterized in that: The shape of the fixing block matches the shape of the mounting groove.

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