A high-safety hydrogen valve based on high-pressure hydrogen

Abstract

The present application relates to the field of hydrogen valves, and in particular to a high-safety hydrogen valve for high-pressure hydrogen, which includes a valve body, a central cavity is provided inside the valve body, an inlet end and an outlet end connected to the central cavity are provided on both sides of the valve body, the valve body is provided with a valve core rotatably provided at the central cavity, the valve body is provided with a sealing ring, the sealing ring is provided at the connection between the central cavity and the inlet end, the sealing ring includes a connecting portion and an abutting portion, the connecting portion is located at a side of the abutting portion away from the valve body, the side of the connecting portion away from the abutting portion is fixed to the inner wall of the inlet end, the side of the abutting portion abuts against the side of the valve body, and the valve body is provided with a pressing member that forces the abutting portion to abut against the valve body. The present application has the effect of improving the sealing performance between the valve core and the inlet end.

Description

Technical Field

[0001] The present application relates to the field of hydrogen valves, and in particular to a high-safety hydrogen valve for high-pressure hydrogen. Background Art

[0002] A Chinese patent document with publication number CN115325201B discloses an intelligent high-pressure hydrogen valve, including a valve body, a central cavity in the middle of the valve body, an air inlet end and an air outlet end are respectively arranged on both sides of the valve body, the valve body is provided with a valve core rotatably connected to the central cavity, a sealing groove is formed at the connection between the air inlet end and the central cavity, a sealing ring is movably arranged in the sealing groove, a sealing gasket that fits the valve core is fixedly arranged on the side of the sealing ring facing the valve core, a rubber ring is arranged between the lower surface of the sealing ring and the bottom wall of the sealing groove, and the sealing between the air inlet end and the valve core is achieved by the rubber ring and the sealing gasket.

[0003] With respect to the above-mentioned related technologies, the inventors believe that since the sealing ring is movably connected, movement will occur between the rubber ring and the bottom wall of the sealing groove. After being used for a period of time, the rubber ring is prone to wear, which will affect the sealing between the lower surface of the sealing ring and the bottom wall of the sealing groove, thereby affecting the sealing between the valve core and the air inlet end when the hydrogen valve is closed. Summary of the invention

[0004] In order to improve the sealing performance between the valve core and the air inlet end, the present application provides a high-safety hydrogen valve for high-pressure hydrogen.

[0005] The present application provides a high-safety hydrogen valve for high-pressure hydrogen, which adopts the following technical solution:

[0006] A high-safety hydrogen valve based on high-pressure hydrogen includes a valve body, a central cavity is arranged inside the valve body, an air inlet end and an air outlet end connected to the central cavity are arranged on both sides of the valve body, the valve body is located in the central cavity and a valve core is rotatably arranged, the valve body is provided with a sealing ring, the sealing ring is located at the connection between the central cavity and the air inlet end, the sealing ring includes a connecting portion and an abutting portion, the connecting portion is located on the side of the abutting portion away from the valve body, the side of the connecting portion away from the abutting portion is fixed to the inner wall of the air inlet end, the side of the abutting portion abuts against the side of the valve body, and the valve body is provided with a pressing member that forces the abutting portion to abut against the valve body.

[0007] By adopting the above technical solution, a sealing ring is provided at the connection between the valve body and the valve core, and the sealing ring includes a connecting portion and an abutting portion. The connecting portion is used to be fixedly connected to the inner wall on one side of the air inlet end, one end of the abutting portion is connected to the connecting portion, and the other end of the abutting portion is attached to the valve core. The abutting portion is forced by the pressing piece, thereby improving the sealing performance.

[0008] Optionally, the pressure member is a pressure ring, and the pressure member is slidably connected to the valve body along the axial direction of the valve body, and the valve body is provided with a first driving component that drives the pressure ring to slide.

[0009] By adopting the above technical solution, a first driving component is provided, which drives the pressure ring to move in the direction close to the valve core to drive the abutment part to abut against the side of the valve core, and the pressure ring can press the abutment part to improve the sealing performance.

[0010] Optionally, a pull ring is provided on the side of the abutting portion away from the valve core, and the valve body is provided with a second driving component for driving the pull ring to move.

[0011] By adopting the above technical solution, when sealing, the pull ring is pulled and moved by the second drive component, so that the abutment portion is tightened, and then the compression ring makes the abutment portion abut against the valve core, thereby reducing the possibility of a gap between the abutment portion and the side of the valve core, thereby improving the sealing performance.

[0012] Optionally, two compression rings are provided, and the two compression rings are coaxially sleeved and distributed, with a gap between the two compression rings, and the pull ring is located between the two compression rings.

[0013] By adopting the above technical solution, two compression rings are provided, and the two compression rings are located on both sides of the pull ring. When the pull ring is pulled, the pull ring will drive the abutment part to move toward the gap between the two compression rings, and the compression rings on both sides can limit the two sides of the abutment part, so that the abutment part can be tightened under the pulling of the pull ring. After that, the compression ring is moved and the abutment part is abutted on the valve core to achieve a sealing effect.

[0014] Optionally, the second driving assembly includes a second air ring and a pull rod, the second air ring is connected to a plurality of pull rods, a second sliding cavity is provided at the air inlet end of the valve body, the second air ring is slidably connected to the second sliding cavity, a plurality of pull rods are provided, and the plurality of pull rods are distributed in a circular array along the axial direction of the pull ring, an air inlet pipe is provided on the side of the second air ring close to the pull rod, the air inlet pipe is connected to the air inlet mechanism, and an air outlet pipe is provided on the side of the second air ring close to the pull rod of the second sliding cavity, and the air outlet pipe is provided.

[0015] By adopting the above technical solution, when the abutting part needs to be tightened, the air intake mechanism introduces gas into the second sliding cavity, causing the second air ring to slide away from the abutting part, thereby driving the pull rod and the pull ring to move, thereby driving the abutting part to be tightened.

[0016] Optionally, the first driving assembly includes a first air ring and a connecting rod, the valve body is provided with a first sliding cavity, the first air ring is slidably connected to the first sliding cavity along the axial direction of the valve body, a plurality of connecting rods are provided, and the plurality of connecting rods are distributed in a circular array around the axial direction of the pressure ring, one end of the connecting rod is connected to the pressure ring, and the other end of the connecting rod is connected to the first air ring, and a connecting pipe is connected to the first sliding cavity on the side of the first air ring away from the connecting rod, and the connecting pipe is connected to the second sliding cavity on the side of the second air ring away from the pull rod.

[0017] By adopting the above technical solution, when the air intake pipe takes air into the second sliding chamber, the second air ring can be driven to slide in the direction away from the abutment portion. At this time, the gas in the second sliding chamber located on the side of the second air ring away from the abutment portion can be pressed into the first sliding chamber through the connecting pipe, thereby driving the first air ring to slide, thereby driving the pressure ring to move in the direction close to the valve core, forcing the abutment portion to abut against the side of the valve core, thereby achieving a sealing effect.

[0018] Optionally, the valve body is provided with a second spring for forcing the second air ring to slide in a direction close to the pull rod, and the valve body is provided with a first spring forcing the first air ring to slide in a direction away from the connecting rod.

[0019] By adopting the above technical solution, a second spring is provided, and when the valve core needs to be rotated, the exhaust valve deflates the second sliding chamber, and then the second air ring slides toward the sliding ring under the action of the second spring, so that the abutment portion is released from the tensioned state; and during the sliding process, the second air ring will draw the gas in the first sliding chamber into the second sliding chamber through the connecting pipe, thereby driving the first air ring to slide, so that the compression ring moves in the direction away from the valve core, so as to facilitate the rotation of the valve core and reduce the wear on the abutment portion.

[0020] Optionally, a guide surface is provided on one side of the two compression rings close to each other, and the two guide surfaces form a guide opening, and the width of the guide opening gradually decreases from the side close to the abutting portion to the side away from the abutting portion.

[0021] By adopting the above technical solution, guide surfaces are provided on two sides of the pressure ring close to each other, thereby forming a guide opening, so as to avoid deformation of the abutting portion.

[0022] Optionally, a valve stem is provided in the middle of the valve core, a control rod is provided on the top of the valve stem, a rotating column is provided at the lower end of the control rod, the valve stem is provided with a rotating groove for the rotating column to rotate the rod, a second steel ball is slidably connected along the rotating column, a second clamping groove is provided on the side wall of the rotating groove, a pressure sensor is provided in the second clamping groove, the pressure sensor is connected to a controller, and the controller is connected to the on-off valve on the inlet pipe and the outlet valve on the outlet pipe.

[0023] By adopting the above technical solution, before the valve core needs to be rotated, the control rod is rotated. When it is rotated to the appropriate position, the second steel ball is clamped in the second clamping groove, thereby abutting against the pressure sensor, and then the on-off valve on the air inlet pipe is controlled by the controller to close and the air outlet valve is opened to discharge the gas in the chamber on the side of the second sliding chamber close to the pull rod. The second air ring can move under the action of the second spring and drive the first air ring to move through the connecting pipe, so that the compression ring will not force the abutment part to abut on the valve core, so as to reduce the wear of the abutment part when the valve core rotates.

[0024] Optionally, the valve body is provided with an elastic sheet, which is in a ring shape, and the elastic sheet and the air inlet end of the valve body are coaxially arranged, and a plurality of first half rings are arranged on the side of the connecting part close to the compression ring and are distributed in a circular array around the axial direction of the connecting part, and the valve body is provided with a plurality of second half rings and are distributed in a circular array around the axial direction of the connecting part, and the inner and outer sides of the elastic sheet are respectively hooked on the first half ring and the second half ring.

[0025] By adopting the above technical solution, when the pressure ring forces the abutting part to abut against the valve core, it will pull the connecting part, making the connecting end of the connecting part and the valve body prone to fatigue damage. Therefore, an elastic sheet is provided. When the pressure ring drives the abutting part to move, it will pull the elastic sheet to deform. The elastic sheet will apply a pulling force to the abutting part away from the valve core, thereby reducing the force acting on the connection of the connecting part when the abutting part is tightened and pulled, thereby improving the service life of the connecting part and the abutting part.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] A sealing ring is provided at the connection between the valve body and the valve core, and the sealing ring includes a connecting portion and an abutting portion, the connecting portion is used to be fixedly connected to the inner wall of one side of the air inlet end, one end of the abutting portion is connected to the connecting portion, and the other end of the abutting portion is attached to the valve core, and the abutting portion is forced by the pressing member to improve the sealing performance;

[0028] Before the valve core needs to be rotated, rotate the control lever. When it is rotated to the appropriate position, the second steel ball is clamped in the second clamping groove, thereby abutting against the pressure sensor. Then, the on-off valve on the air inlet pipe is controlled by the controller to close and the air outlet valve is opened to discharge the gas in the chamber of the second sliding chamber close to the pull rod side. The second air ring can move under the action of the second spring and drive the first air ring to move through the connecting pipe, so that the compression ring will not force the abutment part to abut against the valve core, so as to reduce the wear of the abutment part when the valve core rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of this embodiment 1.

[0030] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0031] Figure 3 yes Figure 1 The enlarged schematic diagram of point B in the middle;

[0032] Figure 4 yes Figure 1 The enlarged schematic diagram of the center C;

[0033] Figure 5 is a schematic diagram of the structure of the control rod in Example 2;

[0034] Figure 6 is a schematic diagram of the connection between the rotating column and the valve stem in Example 2;

[0035] Figure 7 is a schematic diagram of the structure in which the abutting portion is tightened in Example 3;

[0036] Figure 8 is a schematic diagram of the structure in which the abutting portion in Example 3 is not tightened;

[0037] Fig. 9 It is a schematic diagram of the structure of the elastic sheet in Example 3.

[0038] Explanation of reference numerals: 1. valve body; 11. air inlet end; 12. air outlet end; 13. sealing groove; 14. first sliding cavity; 141. first sliding hole; 15. second sliding cavity; 151. second sliding hole; 152. air inlet pipe; 153. air outlet pipe; 154. air outlet valve; 16. first spring; 17. second spring; 18. valve sleeve; 19. central cavity; 2. valve core; 3. compression ring; 31. connecting rod; 32. first driving assembly; 321. first air ring; 322. connecting pipe; 4. sealing ring; 41. connecting part; 42. abutting part; 43. pull ring; 431. guide surface; 44. second driving assembly; 441. pull rod; 442. second air ring; 5. valve stem; 51. First card slot; 52. Second card slot; 53. Pressure sensor; 54. Rotating slot; 6. First pressure seat; 61. Second boss; 62. Second pressure seat; 63. Absorption ring; 631. Threaded hole; 7. First boss; 71. Mounting cavity; 72. Filler; 73. Annular groove; 731. First rubber ring groove; 732. Mounting hole; 733. Second rubber ring groove; 734. Elastic sealing ring; 735. Sealing rubber pad; 736. First steel ball; 74. Through slot; 8. Control rod; 81. Rotating column; 82. Third sliding hole; 83. Third spring; 84. Second steel ball; 9. Elastic sheet; 91. First half ring; 92. Second half ring; 93. Inner groove; 94. Outer groove. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-9 This application is described in further detail. Example

[0040] Example 1 of the present application discloses a high-safety hydrogen valve for high-pressure hydrogen, referring to Figure 1 , including a valve body 1, a central cavity 19 is arranged inside the valve body 1, and an inlet end 11 and an outlet end 12 connected with the central cavity 19 are respectively arranged at both ends of the valve body 1. The valve body 1 is located at the central cavity 19 and a valve core 2 is rotatably arranged. High-pressure hydrogen enters through the inlet end 11 and is discharged from the outlet end 12 after passing through the central cavity 19.

[0041] Reference Figure 1 and Figure 2A sealing groove 13 is formed at the connection between the side wall of the air inlet end 11 and the central cavity 19. A sealing ring 4 is provided at the air inlet end 11 at the sealing groove 13. The sealing ring 4 includes a connecting portion 41 and an abutting portion 42. The connecting portion 41 and the abutting portion 42 are integrally formed. The abutting portion 42 is located in the sealing groove 13 for abutting against the valve core 2. The connecting portion 41 is located at a side of the abutting portion 42 close to the air inlet end 11. The connecting portion 41 is coaxially arranged with the air inlet end 11. The side of the connecting portion 41 away from the abutting portion 42 is fixedly connected to the inner wall of the air inlet end 11. The connecting portion 41 covers the upper opening of the sealing groove 13. The abutment portion 42 is coaxially fixedly connected to the end of the connection portion 41 away from the air inlet end 11, the side of the abutment portion 42 abuts against the side of the valve core 2, and the abutment portion 42 extends along the outer peripheral wall of the valve core 2 in a direction away from the center of the central cavity 19, and the valve body 1 is provided with a pressing member that forces the abutment portion 42 to abut against the valve body 1.

[0042] Reference Figure 1 and Figure 2 The compression member is a compression ring 3, two compression rings 3 are provided, the two compression rings 3 are coaxially sleeved and distributed, the compression ring 3 and the air inlet end 11 are coaxially arranged, the two compression rings 3 are both located in the sealing groove 13, the middle of the abutment portion 42 is located between the valve core 2 and the compression ring 3, and the side of the abutment portion 42 away from the connection portion 41 is fixedly connected to the side of the compression ring 3 with a larger diameter. A plurality of connecting rods 31 are provided on the side of the compression ring 3 away from the valve core 2. In this embodiment, two connecting rods 31 are provided, and the two connecting rods 31 are symmetrical around the axis of the compression ring 3. The axial direction of the connecting rod 31 is parallel to the axial direction of the air inlet end 11, and one end of the connecting rod 31 is fixedly connected to the side of the compression ring 3.

[0043] Reference Figure 1 and Figure 2 A first sliding hole 141 is provided on the side wall of the sealing groove 13, and the connecting rod 31 is slidably connected to the first sliding hole 141 along the axial direction. The sliding pressure ring 3 drives the abutment portion 42 to move and abut against the side of the valve core 2, thereby achieving a sealing effect. The valve body 1 is provided with a first driving component 32 for driving the pressure ring 3 to slide.

[0044] Reference Figure 1 and Figure 2 The first driving assembly 32 includes a first air ring 321. The valve body 1 is provided with a first sliding cavity 14 at the air inlet end 11, and the first sliding cavity is located on the side of the sealing groove away from the valve core 2. The first sliding cavity 14 is in a ring shape, the diameter of the first sliding cavity 14 is larger than the diameter of the air inlet flow channel of the air inlet end 11, and the first sliding cavity 14 is coaxially arranged with the air inlet end 11. In this embodiment, two first sliding cavities 14 are provided, and the two first sliding cavities 14 correspond to the two pressure rings 3 respectively, and the two first sliding cavities 14 are coaxially arranged.

[0045] Reference Figure 1 and Figure 2 The end of the first sliding hole 141 away from the pressure ring 3 is connected to the first sliding chamber 14, and the connecting rod 31 extends into the first sliding chamber 14. The first air ring 321 is slidably connected to the first sliding chamber 14 along the axial direction of the valve body 1, and the end of the connecting rod 31 away from the pressure ring 3 is fixedly connected to the side of the first air ring 321.

[0046] Reference Figure 1 and Figure 2 A pull ring 43 is provided on the side of the abutment portion 42 away from the valve core 2. The pull ring 43 and the abutment portion 42 are coaxially arranged. There is a gap between the two pressure rings 3. The pull ring 43 is located between the two pressure rings 3. The valve body 1 is provided with a second driving component 44 for driving the pull ring 43 to move in a direction away from the valve core 2.

[0047] Reference Figure 1 and Figure 2 The second driving assembly 44 includes a pull rod 441 and a second air ring 442. A plurality of pull rods 441 are provided. In the present embodiment, two pull rods 441 are provided. The two pull rods 441 are symmetrically arranged around the axis of the pull ring 43. The position of the pull rod 441 is located on the same straight line as the connecting rod 31. The pull rod 441 is located between the two compression rings 3. The pull rod 441 is located on the side of the pull ring 43 away from the abutment 42. The axial direction of the pull rod 441 is parallel to the axial direction of the abutment 42. One end of the pull rod 441 is fixedly connected to the pull ring 43.

[0048] Reference Figure 1 and Figure 2 The side wall of the sealing groove 13 is provided with a second sliding hole 151, and the pull rod 441 is slidably connected to the second sliding hole 151 along the axial direction of the abutting portion 42. The middle part of the abutting portion 42 can be pulled away from the valve core 2 by the pull rod 441 and the pull ring 43, and the middle part of the abutting portion 42 is recessed between the two pressing rings 3, so that the abutting portion 42 can be tightened to improve the sealing effect.

[0049] Reference Figure 1 and Figure 2 The air inlet end 11 is located between the two first sliding cavities 14 and has a second sliding cavity 15 . The second sliding cavity 15 is ring-shaped and is coaxially arranged with the first sliding cavity 14 . The end of the second sliding hole 151 away from the pull ring 43 is connected to the second sliding cavity 15 , and the pull rod 441 extends into the second sliding cavity 15 .

[0050] Reference Figure 1 , Figure 2 and Figure 3The second air ring 442 is slidably connected in the second sliding cavity 15, and the pull rod 441 is fixedly connected to the side of the second air ring 442. The second sliding cavity 15 is located on the side of the second air ring 442 close to the pull rod 441 and is connected to an air inlet pipe 152, and the air inlet pipe 152 is connected to an external air inlet mechanism. The second sliding cavity 15 is located on the side of the second air ring 442 close to the pull rod 441 and is provided with an air outlet pipe 153, and an air outlet valve 154 is fixedly connected to the air outlet pipe 153.

[0051] Reference Figure 1 , Figure 2 and Figure 3 The first driving assembly 32 also includes a connecting pipe 322, one end of the connecting pipe 322 is connected to the first sliding chamber 14 on the side of the first air ring 321 away from the connecting rod 31, and the end of the connecting pipe 322 away from the first sliding chamber 14 is connected to the chamber of the second sliding chamber 15 on the side of the second air ring 442 away from the pull rod 441. When the valve core 2 closes the connection between the air inlet end 11 and the air outlet end 12, when air is introduced into the second sliding chamber 15 through the air inlet pipe 152, the second air ring 442 can be driven to slide in the direction away from the abutment portion 42. At this time, the gas in the second sliding chamber 15 located on the side of the second air ring 442 away from the abutment portion 42 is pressed into the first sliding chamber 14 through the connecting pipe 322, thereby driving the first air ring 321 to slide, so as to drive the pressure ring 3 to move in the direction close to the valve core 2, so as to force the abutment portion 42 to abut against the side of the valve core 2, thereby achieving a sealing effect. At this time, the pull rod 441 will pull the pull ring 43, thereby tightening the abutment portion 42 to further improve the sealing effect.

[0052] Reference Figure 1 and Figure 2 The valve body 1 is provided with a first spring 16 for forcing the first air ring 321 to slide in a direction away from the connecting rod 31. The first spring 16 is located in the first sliding cavity 14. The first spring 16 is coaxially sleeved on the connecting rod 31. One end of the first spring 16 is fixedly connected to the inner wall of the first sliding cavity 14, and the other end of the first spring 16 is fixedly connected to the side of the first air ring 321.

[0053] Reference Figure 1 and Figure 2 The valve body 1 is provided with a second spring 17 for forcing the second air ring 442 to slide in the direction close to the pull rod 441. The second spring 17 is located in the second sliding chamber 15. The second spring 17 is coaxially sleeved on the pull rod 441. One end of the second spring 17 is fixedly connected to the side of the second air ring 442, and the other end of the second spring 17 is fixedly connected to the inner wall of the second sliding chamber 15.

[0054] Reference Figure 1 and Figure 2A guide surface 431 is provided on the side where the outer sides of the two compression rings 3 are close to each other. The two guide surfaces 431 form a guide opening, and the width of the guide opening gradually decreases from the side close to the abutting portion 42 to the side away from the abutting portion 42.

[0055] Reference Figure 1 and Figure 4 The upper part of the valve core 2 is fixedly connected with the valve stem 5, and the upper part of the valve body 1 is integrally formed with a valve sleeve 18. The upper end of the valve stem 5 passes through the valve sleeve 18 on the valve body 1 and extends to the outside of the valve body 1. The inner cavity of the valve sleeve 18 is the installation cavity 71. The upper end of the valve stem 5 passes through the installation cavity 71 and extends to the installation cavity 71. A packing 72 is installed in the installation cavity 71. The valve stem 5 is inserted into the packing 72. The packing 72 is used to fill the gap between the valve stem 5 and the valve sleeve 18.

[0056] Reference Figure 1 and Figure 4 The outer peripheral wall of the upper part of the valve sleeve 18 forms a first boss 7, and a first pressure seat 6 is installed on the first boss 7 by bolts. The lower surface of the first pressure seat 6 is fixedly connected with a second boss 61, and the second boss 61 is located in the installation cavity 71 and abuts against the packing 72. The first pressure seat 6 presses the packing 72 in the installation cavity 71 through the second boss 61.

[0057] Reference Figure 1 and Figure 4 The upper surface of the first pressure seat 6 is provided with an annular groove 73 in the vertical direction, and the annular groove 73 extends to the inside of the second boss 61. Both side walls of the annular groove 73 are penetrated with a plurality of through grooves 74, and the two ends of the through grooves 74 are respectively connected to the valve stem 5 and the inner wall of the installation cavity 71. The second boss 61 is provided with an absorption ring located in the annular groove 73, and the inner wall and the outer wall of the absorption ring are coated with a catalyst coating, which is a PT catalyst. The catalyst coating on the absorption ring can absorb the hydrogen leaked between the packing 72 and the valve stem 5 and the hydrogen leaked between the second boss 61 and the valve sleeve 18 through the through grooves 74, thereby achieving the effect of removing the leaked hydrogen.

[0058] Reference Figure 1 and Figure 4 A second pressure seat 62 is provided on the first pressure seat 6, and the lower end of the second pressure seat 62 is inserted into the annular groove 73 to fix the absorption ring. The second pressure seat 62 is installed on the first pressure seat 6 by bolts. A threaded hole is opened on the upper surface of the absorption ring, and the absorption ring is taken out by threading the screw to the threaded hole.

[0059] Reference Figure 1 and Figure 4The outer wall of the annular groove 73 located in the middle is provided with a first rubber ring groove 731, and the second boss 61 is provided with an elastic sealing ring 734 located in the first rubber ring groove 731, and the elastic sealing ring 734 protrudes from the side wall of the annular groove 73. The inner wall of the annular groove 73 located at the upper part is provided with a mounting hole 732, and the bottom wall of the mounting hole 732 is provided with a second rubber ring groove 733. The second boss 61 is provided with a sealing rubber pad 735 opened in the second rubber ring groove 733, and the second boss is provided with a first steel ball 736 located in the mounting hole 732. Before the second pressure seat 62 is installed, the first steel ball 736 protrudes from the side wall of the annular groove 73.

[0060] Reference Figure 1 and Figure 4 Both sides of the lower end of the second pressure seat 62 are provided with inclined surfaces, and both sides of the upper end of the absorption ring are provided with inclined surfaces.

[0061] The implementation principle of the packing embodiment 1 of the present application is as follows: a sealing ring 4 is provided at the connection between the valve body 1 and the valve core 2, and the sealing ring 4 includes a connecting portion 41 and an abutting portion 42, the connecting portion 41 is used to be fixedly connected to the inner wall of one side of the air inlet end 11, and one end of the abutting portion 42 is connected to the connecting portion 41. When the valve core 2 closes the connection between the air inlet end 11 and the air outlet end 12, air is introduced into the second sliding cavity 15 through the air inlet pipe 152, so that the second air ring 442 slides to pass through The pull rod 441 tightens the abutment 42; after sliding, the second air ring 442 presses the gas into the first sliding chamber 14 through the connecting tube 322 to force the first air ring 321 to slide, thereby driving the pressure ring 3 to slide, so that the pressure ring 3 forces the abutment 42 to abut on the valve core 2, thereby improving the sealing performance, and because the second air ring slides in the direction away from the abutment, the abutment is pulled by the pull rod, so that the abutment is tightened, which can further improve the sealing effect. Example

[0062] The difference between Example 2 and Example 1 is that, referring to Figure 1 , Figure 5 and Figure 6 The top of the valve stem 5 is connected to an actuator through a control rod 8, a rotating column 81 is fixedly installed at the bottom of the control rod 8, a rotating groove 54 is provided inside the valve stem 5, and the rotating column 81 is rotatably arranged in the rotating groove 54. The outer walls on both sides of the rotating column 81 are provided with third sliding holes 82, the rotating column 81 is provided with a second steel ball 84 that is slidably connected to the third sliding hole 82, the rotating groove 54 is provided with a first clamping groove 51 for the second steel ball 84 to be clamped, the rotating column 81 is provided with a third spring 83, the spring is located in the third sliding hole 82, one end of the third spring 83 is fixedly connected to the second steel ball 84, and the other end of the third spring 83 is fixedly connected to the hole wall of the third sliding hole 82, and the third spring 83 forces the second steel ball 84 to slide in a direction away from the axis of the rotating column 81.

[0063] Reference Figure 1-Figure 3 , Figure 5 as well as Figure 6 The groove wall of the rotating groove 54 is provided with a second clamping groove 52, and two second clamping grooves 52 are provided. The two first clamping grooves 51 and the two second clamping grooves 52 are arranged in a circumferential array around the axis direction of the rotating column 81 and are alternately distributed. A pressure sensor 53 is arranged in the second clamping groove 52, and the output end of the pressure sensor 53 is electrically connected to the controller, and the output end of the controller is electrically connected to the input ends of the on-off valve and the exhaust valve on the intake pipe 152 respectively.

[0064] The implementation principle of Example 2 is as follows: when it is necessary to rotate the valve core 2 to open the connection between the air inlet end 11 and the air outlet end 12, high sealing is not required at this time, and the control rod 8 can be rotated. When it is rotated to a suitable position, the second steel ball 84 is clamped in the second clamping groove 52, thereby abutting against the pressure sensor 53, and then the on-off valve on the air inlet pipe 152 is controlled by the controller to close and the air outlet valve 154 is opened to discharge the gas in the chamber on the side of the second sliding chamber 15 close to the pull rod 441. The second air ring 442 can move under the action of the second spring 17, and drive the first air ring 321 to move through the connecting pipe 322, so that the compression ring 3 will not force the abutment part 42 to abut on the valve core 2, so as to reduce the wear of the abutment part 42 when the valve core 2 rotates. Example

[0065] The difference between Example 3 and Example 1 is that, referring to Figure 7-Figure 9 The side wall of the sealing groove 13 is provided with an elastic sheet 9, which is in a ring shape. The elastic sheet 9 and the compression ring 3 are coaxially arranged. The elastic sheet 9 has an outer groove 94 and an inner groove 93. The outer groove 94 is connected to the outer side wall of the elastic sheet 9. There are a plurality of outer grooves 94, which are arranged in a circular array around the axis direction of the elastic sheet 9. There are a plurality of inner grooves 93, which are arranged in a circular array around the axis direction of the elastic sheet 9. The inner grooves 93 and the outer grooves 94 are alternately arranged, and the inner grooves 93 are connected to the inner side wall of the elastic sheet 9.

[0066] Reference Figure 7-Figure 9 The inner side surface of the connection portion 41 is fixedly connected with a plurality of first half rings 91, and the plurality of first half rings 91 are distributed in a circumferential array around the axis direction of the connection portion 41. The side wall of the sealing groove 13 is fixedly connected with a plurality of second half rings 92, and the plurality of second half rings 92 are distributed in a circumferential array around the axis direction of the sealing groove 13. The first half ring 91 is hooked with the outer groove 94 on the elastic sheet 9, and the two ends of the first half ring 91 are fixedly connected to the side surface of the connection portion 41. The second half ring 92 is hooked with the inner groove 93 provided on the elastic sheet 9, and the two ends of the second half ring 92 are fixedly connected to the side wall of the sealing groove 13.

[0067] The implementation principle of Example 3 is as follows: when the pressure ring 3 forces the abutment part 42 to abut against the valve core 2, it will pull the connecting part 41, making the connecting end of the connecting part 41 and the valve body 1 prone to fatigue damage. Therefore, an elastic sheet 9 is provided. When the pressure ring 3 drives the abutment part 42 to move, it will pull the elastic sheet 9 to deform. The elastic sheet 9 will apply a pulling force to the abutment part 42 away from the valve core 2, thereby reducing the force acting on the connection of the connecting part 41 when the abutment part 42 is tightened and pulled, thereby improving the service life of the connecting part 41 and the abutment part 42.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-safety hydrogen valve for high-pressure hydrogen, characterized in that: The valve body (1) comprises a valve body (1), wherein a central cavity (19) is arranged inside the valve body (1), and an air inlet end (11) and an air outlet end (12) which are connected to the central cavity (19) are arranged on both sides of the valve body (1), respectively; a valve core (2) is rotatably arranged on the valve body (1) at the central cavity (19), and the valve body (1) is provided with a sealing ring (4), wherein the sealing ring (4) is located at the connection between the central cavity (19) and the air inlet end (11), and the sealing ring (4) comprises a connecting portion (41) and an abutting portion (42), wherein the connecting portion (41) is located away from the abutting portion (42) and away from the valve body (1). The side of the connecting portion (41) away from the abutting portion (42) is fixed to the inner wall of the air inlet end (11); the side of the abutting portion (42) abuts against the side of the valve body (1); the valve body (1) is provided with a pressing member for forcing the abutting portion (42) to abut against the valve body (1); the pressing member is a pressing ring (3) which is slidably connected to the valve body (1) along the axial direction of the valve body (1); the valve body (1) is provided with a first driving component (32) which drives the pressing ring (3) to slide; the side of the abutting portion (42) away from the valve core (2) is provided with a pull ring (43); The valve body (1) is provided with a second driving assembly (44) for driving the pull ring (43) to move; two compression rings (3) are provided, the two compression rings (3) are coaxially sleeved, a gap is provided between the two compression rings (3), and the pull ring (43) is located between the two compression rings (3); the second driving assembly (44) comprises a second gas ring (442) and a pull rod (441), the second gas ring (442) is connected to a plurality of pull rods (441), the valve body (1) is provided with a second sliding cavity (15) at the gas inlet end (11), and the second gas ring ( 442) is slidably connected to the second sliding cavity (15), a plurality of pull rods (441) are provided, and the plurality of pull rods (441) are distributed in a circular array along the axial direction of the pull ring (43), the second sliding cavity (15) is located on the side of the second air ring (442) close to the pull rod (441) and is provided with an air inlet pipe (152), the air inlet pipe (152) is connected to the air inlet mechanism, the second sliding cavity (15) is located on the side of the second air ring (442) close to the pull rod (441) and is provided with an air outlet pipe (153), and the air outlet pipe (153) is provided with an air outlet valve (154).

2. A high-safety hydrogen valve for high-pressure hydrogen according to claim 1, characterized in that: The first driving component (32) comprises a first air ring (321) and a connecting pipe (322); the valve body (1) is provided with a first sliding cavity (14); the first air ring (321) is connected to the first sliding cavity (14) by sliding along the axial direction of the valve body (1); a connecting rod (31) is provided on the side of the pressure ring (3) away from the valve core (2); a plurality of connecting rods (31) are provided, and the plurality of connecting rods (31) are distributed in a circular array around the axial direction of the pressure ring (3); one end of the connecting rod (31) is connected to the pressure ring (3); the other end of the connecting rod (31) is connected to the first air ring (321); one end of the connecting pipe (322) is connected to the first sliding cavity (14) on the side of the first air ring (321) away from the connecting rod (31); the other end of the connecting pipe (322) is connected to the second sliding cavity (15) on the side of the second air ring (442) away from the pull rod (441).

3. A high-safety hydrogen valve for high-pressure hydrogen according to claim 2, characterized in that: The valve body (1) is provided with a second spring (17) for forcing the second air ring (442) to slide in a direction close to the pull rod (441), and the valve body (1) is provided with a first spring (16) forcing the first air ring (321) to slide in a direction away from the connecting rod (31).

4. A high-safety hydrogen valve for high-pressure hydrogen according to claim 1, characterized in that: A guide surface (431) is provided on the side where the two compression rings (3) are close to each other, and the two guide surfaces (431) form a guide opening, the width of which gradually decreases from the side close to the abutment portion (42) to the side away from the abutment portion (42).

5. A high-safety hydrogen valve for high-pressure hydrogen according to claim 1, characterized in that: A valve stem (5) is provided in the middle of the valve core (2), a control rod (8) is provided at the top of the valve stem (5), a rotating column (81) is provided at the lower end of the control rod (8), the valve stem (5) is provided with a rotating groove (54) for the rotating column (81) to rotate the rod, a second steel ball (84) is slidably connected along the rotating column (81), a second clamping groove (52) is provided on the side wall of the rotating groove (54), a pressure sensor (53) is provided in the second clamping groove (52), the pressure sensor (53) is connected to a controller, and the controller is connected to an on-off valve on an air inlet pipe (152) and an air outlet valve (154) on an air outlet pipe (153).

6. A high-safety hydrogen valve for high-pressure hydrogen according to claim 2, characterized in that: The valve body (1) is provided with an elastic sheet (9), the elastic sheet (9) is in a ring shape, the elastic sheet (9) and the air inlet end (11) of the valve body (1) are coaxially arranged, a side surface of the connecting portion (41) close to the pressure ring (3) is provided with a plurality of first semi-rings (91) and are distributed in a circular array around the axis direction of the connecting portion (41), the valve body (1) is provided with a plurality of second semi-rings (92) and are distributed in a circular array around the axis direction of the connecting portion (41), and the inner side and the outer side of the elastic sheet (9) are hooked on the first semi-ring (91) and the second semi-ring (92) respectively.

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