Hydrogenation valve with multiple seal structure

Abstract

The application discloses a hydrogenation valve with a multiple sealing structure, which comprises a switch component, an upper cover component, a main body channel, a check device and a pressure self-tightening device. The switch component comprises a valve rod, a fixed block, a rotating rod, a stop block and a valve clack. The fixed block is provided below the upper cover component and is fixedly connected with the upper cover component. The valve rod penetrates through the upper cover component and is slidably connected with the upper cover component. The upper cover component is provided below the main body channel and is fixedly connected with the main body channel. The pressure self-tightening device is arranged at the connecting position of the upper cover component and the main body channel. The main body channel is provided with the check device on one side.

Description

Technical Field

[0001] This invention relates to the field of hydrogenation valve technology, specifically to a hydrogenation valve with a multi-seal structure. Background Technology

[0002] Hydrogen energy is being used more and more widely around the world today, from traditional petrochemical fields to emerging hydrogen internal combustion engines. As a clean energy source, hydrogen energy is gradually replacing traditional polluting energy sources, and it is being integrated into normal social life, playing an increasingly important role.

[0003] Most existing hydrogenation valve seals are single-stage seals. After a period of use, gaps may appear in the fit between the valve disc and the valve body due to friction, resulting in gas leakage. Hydrogenation equipment operates under high pressure, and single-stage seals may not provide a long sealing time. Furthermore, trace amounts of hydrogen sulfide may remain in the hydrogen gas, which can be corrosive to traditional valve discs. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrogenation valve with a multi-seal structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] The hydrogenation valve with a multi-seal structure includes a switching component, a top cover component, a main channel, a check device, and a pressure self-tightening device. The switching component includes a valve stem, a fixing block, a rotating rod, a stop block, and a valve disc. The top cover component is located below the fixing block and is fixedly connected to the top cover component. The valve stem passes through the top cover component and is slidably connected to the top cover component. The main channel is located below the top cover component and includes a valve body. The top cover component is fixedly connected to the valve body. A pressure self-tightening device is located at the connection between the top cover component and the main channel. A check device is located on one side of the main channel.

[0007] The switching component is the key component for ensuring the valve is vented and sealed. It achieves opening and closing by a valve stem that passes through the upper cover component. The switching component is kept in place by a fixing block that is fixedly connected to the upper cover component. The valve stem is slidably connected to the upper cover component. The upper cover component is the passage for gas to pass through, and it fits the main channel. A pressure self-tightening device is installed between the two. A check device is installed on one side of the main channel and is placed inside the main channel pipe.

[0008] Furthermore, a stop block is provided above the valve stem, and the valve stem is fixedly connected to the stop block. A valve disc is provided below the valve stem, and the valve stem is fixedly connected to the valve disc. The valve disc abuts against the main body channel. A trapezoidal ring is provided above the valve disc, and the trapezoidal ring is fixedly connected to the valve stem. The trapezoidal ring abuts against the upper cover component. A fixing block is provided below the stop block, and the fixing block is fixedly connected to the upper cover component. A rotating rod is provided in the middle of the fixing block, and the rotating rod is drivenly connected to the valve stem.

[0009] The valve stem passes through the upper cover component and is located inside the main channel along with the valve disc. The connection between the rotating rod and the valve stem is provided with a thread that matches the valve stem. The rotating rod is fixed in the middle of the fixing block, which is fixedly connected to the upper cover component to maintain its position. Therefore, the fixing block ensures that the rotating rod can only rotate while maintaining its position. Because the rotating rod only rotates and its position remains unchanged, the valve stem can only move up and down without continuous rotation, thereby reducing the amount of friction between the rotating rod and the valve stem and extending its service life. A stop is provided above the valve stem to limit the maximum downward movement of the valve stem, and a trapezoidal ring is provided below the valve stem. On the one hand, it limits the maximum upward movement distance of the valve stem, and on the other hand, it can achieve the purpose of sealing when venting. The valve disc achieves the function of sealing and opening through the movement of the valve stem.

[0010] Furthermore, the upper cover component includes a valve cover, a gland, a spacer ring, packing, and a pressure ring. A fixing block is provided above the gland, and the gland is fixedly connected to the fixing block. The gland is slidably connected to the valve stem. A spacer ring is provided below the gland, and the gland abuts against the spacer ring. A valve cover is provided below the gland, and the gland is fixedly connected to the valve cover. The valve cover is slidably connected to the valve stem. A spacer ring and packing are provided inside the valve cover. The valve cover is fixedly connected to the spacer ring and the packing. The valve cover abuts against a trapezoidal ring. A pressure ring is provided above the valve cover, and the valve cover is fixedly connected to the pressure ring. Packing is provided below the spacer ring, and the spacer ring abuts against the packing. The spacer ring is slidably connected to the valve stem. The packing is slidably connected to the valve stem. The pressure ring is fixedly connected to the main body channel. The valve cover is fixedly connected to the pressure self-tightening device and the main body channel.

[0011] The valve stem slides through the hole in the middle of the valve cover and is connected to the valve cover. The packing is also located in the hole in the middle of the valve cover. The packing can effectively prevent gas from leaking through the valve cover hole when the valve is opened. The spacer ring is located above the packing and abuts against the packing. The spacer ring can ensure that the pressure on the packing is relatively uniform and will not cause air leakage due to uneven force. A pressure cap is located above the spacer ring. The pressure cap is fixedly connected to the fixing block. The pressure cap part is placed in the valve cover hole. The pressure cap is used to compress the packing and prevent loosening and air leakage. When the valve is opened, the lower part of the valve cover hole abuts against the trapezoidal ring, and part of the trapezoidal ring is embedded in the hole, thereby achieving a sealing effect. A pressure ring is located above the edge of the valve cover. The pressure ring is used to fix the connection between the main body channel and the valve cover and ensure that the valve cover remains in the same position when the valve is open.

[0012] Furthermore, the pressure self-tightening device includes a four-ring, a square ring, and a wedge-shaped sealing ring. The main channel has a groove, the four-ring is placed in the groove, and the four-ring is fixedly connected to the main channel. The square ring is located below the four-ring, and the four-ring is fixedly connected to the square ring. The main channel is located on one side of the square ring, and the square ring is fixedly connected to the main channel. A valve cover is located on the other side of the square ring, and the square ring is fixedly connected to the valve cover. The main channel is located on one side of the wedge-shaped sealing ring, and a wedge-shaped sealing ring is located below the square ring. The square ring abuts against the wedge-shaped sealing ring, and the wedge-shaped sealing ring is fixedly connected to the main channel. A valve cover is located on the other side of the wedge-shaped sealing ring, and the wedge-shaped sealing ring is fixedly connected to the valve cover.

[0013] The four-ring is placed in the groove of the main channel and protrudes slightly. Below the four-ring is a square ring. The protruding part of the four-ring abuts against the square ring to keep the square ring from moving. Below the square ring is a wedge-shaped sealing ring. The square ring keeps the wedge-shaped sealing ring from moving. The wedge-shaped sealing ring fits with the edge of the valve cover. When the valve is opened, the pressure of the medium in the channel increases. The valve cover moves slightly upward due to the pressure, thus squeezing the wedge-shaped sealing ring and making the sealing performance stronger. Therefore, the stronger the medium pressure, the stronger the sealing performance between the valve cover and the main channel.

[0014] Furthermore, the main channel also includes a valve seat gasket, a pressure ring and a valve cover are provided above the valve body, the valve body is fixedly connected to the pressure ring, the valve body is fixedly connected to the valve cover, the valve body is fixedly connected to the pressure self-tightening device, an air inlet flange is provided on one side of the valve body, the valve body is fixedly connected to the air inlet flange, an air outlet flange is provided on the other side of the valve body, the valve body is fixedly connected to the air outlet flange, a valve seat gasket is provided on the air inlet of the valve body, the valve seat gasket abuts against the valve disc, a check device is provided in the air outlet flange pipe, and the air outlet flange is fixedly connected to the check device.

[0015] The valve body is the main body through which hydrogen flows when the valve is opened. The pressure ring on the top of the valve body fixes the valve body and the valve cover in place, preventing relative movement between the two due to pressure during gas filling, thus ensuring no safety accidents occur. The groove on the valve body fixes the four-ring seal, ensuring the pressure self-tightening device has a good effect. The inlet flange on one side of the valve body is used to fix the inlet port and the gas filling device. The outlet flange on the other side of the valve body has a groove, and the check device is placed in the groove with its main body inside the valve body pipe. The valve body and the check device abut against each other. The valve seat part of the valve body has a valve seat gasket, which abuts against the valve disc. The valve seat gasket can more effectively seal and prevent gas leakage.

[0016] Furthermore, the check device includes a baffle support, a check plate, a spring, and a stop plate gasket. The baffle support passes through the outlet flange and is fixedly connected to the outlet flange. A spring is provided on the outside of the baffle support and is fixedly connected to the spring. A check plate is provided on the other side of the spring and is fixedly connected to the spring. A hole is provided in the middle of the check plate, through which the baffle support passes. The check plate is slidably connected to the baffle support. A stop plate gasket is provided on the other side of the check plate and is fixedly connected to the check plate. A hole is provided in the middle of the stop plate gasket, through which the baffle support passes. The stop plate gasket is slidably connected to the baffle support.

[0017] The baffle support serves as a fixed support. A hole is provided on the baffle plate at the tail of the support for venting. A spring is fitted onto the support and fixedly connected to the baffle. The support passes through the hole between the check plate and the stop plate gasket, preventing them from wobbling. The spring is fixedly connected to the check plate, ensuring that the baffle tightly blocks the air inlet even when there is no pressure in the pipeline, maintaining the purity of the gas in the pipeline. The stop plate gasket on the check plate further enhances the sealing performance of the check device. Due to the structure of the check device, the spring is compressed to open the valve only when the pressure at the air inlet is greater than that at the air outlet; conversely, the greater the medium pressure at the air outlet, the better the sealing effect.

[0018] As an optimization, the double-seal structure can improve the sealing effect and extend the service life.

[0019] Compared with the prior art, the beneficial effects achieved by this application are as follows: This application adds a sealing procedure through a check device, which enhances the sealing effect. When there is no pressure on both sides of the pipeline, the spring still presses the air inlet to ensure the purity of the gas in the pipeline. In addition, the check device has the characteristic that the greater the medium pressure, the better the sealing effect. The pressure self-tightening device between the valve body and the valve cover means that the two no longer rely solely on the traditional bolt pressing for sealing. Once there is movement, the sealing performance will be greatly reduced. The unique device of the pressure self-tightening device makes the valve cover move due to the medium pressure, which actually enhances the sealing performance. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the switching component structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the upper cover component structure of the present invention;

[0024] Figure 4This is an enlarged schematic diagram of the pressure self-tightening device structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the main channel structure of the present invention;

[0026] Figure 6 This is a schematic diagram of a partial A-structure of the main channel of the present invention;

[0027] Figure 7 This is an enlarged schematic diagram of the check valve structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the outlet flange structure of the present invention;

[0029] In the diagram: 1-Switch component, 11-Valve stem, 12-Rotating rod, 13-Fixing block, 14-Stop block, 15-Valve disc, 16-Trapezoidal ring, 2-Upper cover component, 21-Valve cover, 22-Gland, 23-Spacer ring, 24-Packing, 25-Pressure ring, 3-Main body channel, 31-Valve body, 32-Inlet flange, 33-Outlet flange, 34-Valve seat gasket, 4-Check device, 41-Baffle support, 42-Check plate, 43-Spring, 44-Stop gasket, 5-Pressure self-tightening device, 51-Four-ring, 52-Square ring, 53-Wedge seal ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] The present invention provides the following technical solution:

[0032] like Figure 1 As shown, the hydrogenation valve with a multi-seal structure includes a switching component 1, an upper cover component 2, a main channel 3, a check device 4, and a pressure self-tightening device 5. The switching component 1 includes a valve stem 11, a fixing block 13, a rotating rod 12, a stop block 14, and a valve disc 15. The upper cover component 2 is located below the fixing block 13 and is fixedly connected to the upper cover component 2. The valve stem 11 passes through the upper cover component 2 and is slidably connected to the upper cover component 2. The main channel 3 is located below the upper cover component 2 and includes a valve body 31. The upper cover component 2 is fixedly connected to the valve body 31. A pressure self-tightening device 5 is located at the connection between the upper cover component 2 and the main channel 3. A check device 4 is located on one side of the main channel 3.

[0033] The switch component 1 is a key component for gas filling and sealing. It is opened and closed by a valve stem 11 that passes through the upper cover component 2. The switch component 1 is kept in a fixed position by a fixing block 13 that is fixedly connected to the upper cover component 2. The valve stem 11 is slidably connected to the upper cover component 2. The upper cover component 2 is located below the main channel 3 through which the gas passes. The switch component 1 fits the main channel 3. A pressure self-tightening device 5 is provided between the two. A check device 4 is provided on one side of the main channel 3. The check device 4 is placed inside the main channel 3 pipe.

[0034] like Figure 2 As shown, a stop block 14 is provided above the valve stem 11, and the valve stem 11 is fixedly connected to the stop block 14. A valve disc 15 is provided below the valve stem 11, and the valve stem 11 is fixedly connected to the valve disc 15. The valve disc 15 abuts against the main body channel 3. A trapezoidal ring 16 is provided above the valve disc 15, and the trapezoidal ring 16 is fixedly connected to the valve stem 11. The trapezoidal ring 16 abuts against the upper cover component 2. A fixing block 13 is provided below the stop block 14, and the fixing block 13 is fixedly connected to the upper cover component 2. A rotating rod 12 is provided in the middle of the fixing block 13, and the rotating rod 12 is connected to the valve stem 11 in a transmission manner.

[0035] like Figure 3 As shown, the valve stem 11 passes through the upper cover component 2 and is placed inside the main body channel 3 along with the valve disc 15. The connection between the rotating rod 12 and the valve stem 11 is provided with a thread that fits the valve stem 11. The rotating rod 12 is fixed in the middle of the fixing block 13. The fixing block 13 is fixedly connected to the upper cover component 2 and keeps its position unchanged. Therefore, the fixing block 13 ensures that the rotating rod 12 can only rotate and keep its position unchanged. Because the rotating rod 12 only rotates and its position remains unchanged, the valve stem 11 can only move up and down and will not rotate continuously, thereby reducing the amount of friction between the upper cover component 2 and the valve stem 11 and extending its service life. A stop block 14 is provided above the valve stem 11 to limit the maximum downward movement of the valve stem 11. A trapezoidal ring 16 is provided below the valve stem 11. On the one hand, it limits the maximum upward movement distance of the valve stem 11. On the other hand, it can achieve the purpose of sealing when venting. The valve disc 15 achieves the function of sealing and opening through the movement of the valve stem 11.

[0036] The upper cover component 2 includes a valve cover 21, a pressure cap 22, a spacer ring 23, packing 24, and a pressure ring 25. A fixing block 13 is provided above the pressure cap 22, and the pressure cap 22 is fixedly connected to the fixing block 13. The pressure cap 22 is slidably connected to the valve stem 11. A spacer ring 23 is provided below the pressure cap 22, and the pressure cap 22 abuts against the spacer ring 23. The valve cover 21 is provided below the pressure cap 22, and the pressure cap 22 is fixedly connected to the valve cover 21. The valve cover 21 is slidably connected to the valve stem 11. A spacer ring 23 and packing 24 are provided inside the valve cover 21. The valve cover 21 is fixedly connected to the spacer ring 23, the valve cover 21 is fixedly connected to the packing 24, the valve cover 21 abuts against the trapezoidal ring 16, the valve cover 21 is provided with a pressure ring 25 above it, the valve cover 21 is fixedly connected to the pressure ring 25, the spacer ring 23 is provided with a packing 24 below it, the spacer ring 23 abuts against the packing 24, the spacer ring 23 is slidably connected to the valve stem 11, the packing 24 is slidably connected to the valve stem 11, the pressure ring 25 is fixedly connected to the main body channel 3, the valve cover 21 is fixedly connected to the pressure self-tightening device 5, and the valve cover 21 is fixedly connected to the main body channel 3.

[0037] The valve stem 11 passes through the hole in the middle of the valve cover 21 and is slidably connected to the valve cover 21. The packing 24 is also located in the hole in the middle of the valve cover 21. The packing 24 can effectively prevent gas from leaking through the hole in the valve cover 21 when the valve is opened. The spacer ring 23 is located above the packing 24 and abuts against the packing 24. The spacer ring 23 can ensure that the pressure on the packing 24 is relatively uniform and there will be no air leakage due to uneven force. A pressure cap 22 is provided above the spacer ring 23. The pressure cap 22 is fixedly connected to the fixing block 13. The pressure cap 22 is partially placed in the hole in the valve cover 21. The pressure cap 22 is used to press the packing 24 tightly and prevent loosening and air leakage. When the valve is opened, the lower part of the hole in the valve cover 21 abuts against the trapezoidal ring 16, and part of the trapezoidal ring 16 is embedded in the hole, thereby achieving a sealing effect. A pressure ring 25 is provided above the edge of the valve cover 21. The pressure ring 25 is used to fix the main channel 3 and the valve cover 21 and ensure that the valve cover 21 remains in the same position when the valve is open.

[0038] like Figure 4 As shown, the pressure self-tightening device 5 includes a four-ring 51, a square ring 52, and a wedge-shaped sealing ring 53. The main channel 3 has a groove, and the four-ring 51 is placed in the groove and fixedly connected to the main channel 3. The square ring 52 is located below the four-ring 51 and is fixedly connected to the four-ring 51. The main channel 3 is located on one side of the square ring 52 and is fixedly connected to the square ring 52. A valve cover 21 is located on the other side of the square ring 52 and is fixedly connected to the valve cover 21. The main channel 3 is located on one side of the wedge-shaped sealing ring 53, and the wedge-shaped sealing ring 53 is located below the square ring 52. The square ring 52 and the wedge-shaped sealing ring 53 abut against each other and are fixedly connected to the main channel 3. A valve cover 21 is located on the other side of the wedge-shaped sealing ring 53 and is fixedly connected to the valve cover 21.

[0039] The four-ring 51 is placed in the groove of the main channel 3 and protrudes partially. A square ring 52 is provided below the four-ring 51. The protruding part of the four-ring 51 abuts against the square ring 52 to keep the square ring 52 from moving. A wedge-shaped sealing ring 53 is provided below the square ring 52. The square ring 52 keeps the wedge-shaped sealing ring 53 from moving. The wedge-shaped sealing ring 53 fits with the edge of the valve cover 21. When the valve is opened, the pressure of the medium in the channel increases. The valve cover 21 moves slightly upward due to the pressure, thus squeezing the wedge-shaped sealing ring 53 and making the sealing performance stronger. Therefore, the stronger the medium pressure, the stronger the sealing performance between the valve cover 21 and the main channel 3.

[0040] like Figure 5 , 6 As shown, the main channel 3 also includes a valve seat gasket 32. A pressure ring 25 and a valve cover 21 are provided on the top of the valve body 31. The valve body 31 is fixedly connected to the pressure ring 25, the valve body 31 is fixedly connected to the valve cover 21, and the valve body 31 is fixedly connected to the pressure self-tightening device 5. An air inlet flange 6 is provided on one side of the valve body 31, and the valve body 31 is fixedly connected to the air inlet flange 6. An air outlet flange 7 is provided on the other side of the valve body 31, and the valve body 31 is fixedly connected to the air outlet flange 7. A valve seat gasket 32 ​​is provided on the air inlet of the valve body 31, and the valve seat gasket 32 ​​abuts against the valve disc 15. A check device 4 is provided in the pipe of the air outlet flange 7, and the air outlet flange 7 is fixedly connected to the check device 4.

[0041] The valve body 31 is the main body for hydrogen flow when the valve is opened. The pressure ring 25 on the top of the valve body 31 fixes the valve body 31 and the valve cover 21 together. During gas filling, the two will not move relative to each other due to pressure, ensuring that no safety accidents will occur. The groove on the valve body 31 fixes the four-ring 51 and does not move, thus ensuring that the pressure self-tightening device 5 has a good effect. The air inlet flange 6 on one side of the valve body 31 is used to fix the air inlet and the gas filling device. The other side of the valve body 31 is provided with an air outlet flange 7. The air outlet flange 7 is provided with a groove. The check device 4 is placed in the groove and its main body is in the pipeline of the valve body 31. The valve body 31 abuts against the check device 4. The valve seat part of the valve body 31 is provided with a valve seat gasket 32. The valve seat gasket 32 ​​abuts against the valve disc 15. The valve seat gasket 32 ​​can more effectively seal and prevent gas leakage.

[0042] like Figure 7 , 8As shown, the check device 4 includes a baffle support 41, a check plate 42, a spring 43, and a stop plate gasket 44. The baffle support 41 passes through the outlet flange 7 and is fixedly connected to the outlet flange 7. A spring 43 is provided on the outside of the baffle support 41 and is fixedly connected to the spring 43. A check plate 42 is provided on the other side of the spring 43 and is fixedly connected to the spring 43. A hole is provided in the middle of the check plate 42, through which the baffle support 41 passes. The check plate 42 is slidably connected to the baffle support 41. A stop plate gasket 44 is provided on the other side of the check plate 42 and is fixedly connected to the check plate 42. A hole is provided in the middle of the stop plate gasket 44, through which the baffle support 41 passes. The stop plate gasket 44 is slidably connected to the baffle support 41.

[0043] The baffle support 41 serves as a fixed support. The baffle plate at the tail of the baffle support 41 has a hole for venting. The spring 43 is sleeved on the support and fixedly connected to the baffle. The support passes through the hole between the check plate 42 and the stop plate gasket 44 to prevent them from shaking. The spring 43 is fixedly connected to the check plate 42 so that even when there is no pressure in the pipeline, the stop plate gasket 44 can still tightly block the air inlet, maintaining the purity of the gas in the pipeline. The stop plate gasket 44 on the check plate 42 can make the sealing of the check device 4 better. Due to the structure of the check device 4, the spring 43 will be compressed to open the valve only when the pressure at the air inlet is greater than that at the air outlet. Conversely, the greater the medium pressure at the air outlet, the better the sealing effect.

[0044] The working principle of this invention is as follows: When hydrogen needs to be added, rotating the rotary rod 12 moves the valve rod 11 upward without rotating itself, reducing the friction between the valve rod 11 and the packing 24. The valve rod 11 moves the valve disc 15 upward together until the trapezoidal ring 16 abuts against the valve cover 21, and the valve seat is fully opened, allowing hydrogen to enter the outlet pipe. When the pressure in the inlet pipe is greater than that in the outlet pipe, the spring 43 is compressed, opening the inlet and starting the gas addition. The pressure inside the valve body 31 increases, and the pressure self-tightening device 5 between the valve body 31 and the valve cover 21 takes effect, ensuring a complete seal between the valve body 31 and the valve cover 21 and a smooth gas addition process. When the gas addition ends, the rotary rod 12 rotates, and the valve rod 11 moves the valve disc 15 downward, abutting against the valve seat gasket 32. At the same time, the check device 4 begins to function. Under the action of the spring 43 and the medium pressure, the check plate 42 pushes the check plate gasket 44 against the valve body 31. The greater the medium pressure, the better the sealing effect, achieving a double sealing effect.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrogenation valve with a multi-seal structure, characterized in that: The hydrogenation valve with the multi-sealing structure includes a switching component (1), a top cover component (2), a main channel (3), a check device (4), a pressure self-tightening device (5), an inlet flange (6), and an outlet flange (7). The switching component (1) includes a valve stem (11) and a fixing block (13). The top cover component (2) is located below the fixing block (13). The fixing block (13) is fixedly connected to the top cover component (2). The valve stem (11) passes through the top cover component (2). The valve stem (11) is slidably connected to the top cover component (2). The main channel (3) is located below the top cover component (2). The main channel (3) includes a valve body (31). The top cover component (2) is fixedly connected to the valve body (31). A pressure self-tightening device (5) is located at the connection between the top cover component (2) and the main channel (3). A check device (4) is located on one side of the main channel (3). The pressure self-tightening device (5) includes a four-ring (51), a square ring (52), and a wedge-shaped sealing ring (53). The main channel (3) has a groove, and the four-ring (51) is placed in the groove. The four-ring (51) is fixedly connected to the main channel (3). The square ring (52) is located below the four-ring (51), and the four-ring (51) is fixedly connected to the square ring (52). The main channel (3) is located on one side of the square ring (52), and the square ring (52) is fixedly connected to the main channel (3). A valve cover (21) is provided on the other side of the square ring (52). The square ring (52) is fixedly connected to the valve cover (21). A main body channel (3) is provided on one side of the wedge-shaped sealing ring (53). A wedge-shaped sealing ring (53) is provided below the square ring (52). The square ring (52) and the wedge-shaped sealing ring (53) abut against each other. The wedge-shaped sealing ring (53) is fixedly connected to the main body channel (3). A valve cover (21) is provided on the other side of the wedge-shaped sealing ring (53). The wedge-shaped sealing ring (53) is fixedly connected to the valve cover (21). The check valve (4) includes a baffle support (41), a check plate (42), a spring (43), and a check gasket (44). The baffle support (41) passes through the outlet flange (7) and is fixedly connected to the outlet flange (7). A spring (43) is provided on the outside of the baffle support (41), and the baffle support (41) is fixedly connected to the spring (43). A check plate (42) is provided on the other side of the spring (43), and the spring (43) and the check plate (44) are fixedly connected. 2) Fixed connection: The check plate (42) has a hole in the middle, and the baffle support (41) passes through the hole in the middle. The check plate (42) and the baffle support (41) are slidably connected. The check plate (42) has a stop plate gasket (44) on the other side. The stop plate gasket (44) is fixedly connected to the check plate (42). The stop plate gasket (44) has a hole in the middle, and the baffle support (41) passes through the middle. The stop plate gasket (44) and the baffle support (41) are slidably connected.

2. A hydrogenation valve with a multiple sealing structure according to claim 1, characterized in that: The switch component (1) also includes a rotary rod (12), a stop block (14), and a valve disc (15). The stop block (14) is provided above the valve rod (11), and the valve rod (11) is fixedly connected to the stop block (14). The valve disc (15) is provided below the valve rod (11), and the valve rod (11) is fixedly connected to the valve disc (15). The valve disc (15) abuts against the main channel (3). A trapezoidal ring (16) is provided above the valve disc (15), and the trapezoidal ring (16) is fixedly connected to the valve rod (11). The trapezoidal ring (16) abuts against the upper cover component (2). A fixing block (13) is provided below the stop block (14), and the fixing block (13) is fixedly connected to the upper cover component (2). A rotary rod (12) is provided in the middle of the fixing block (13), and the rotary rod (12) is connected to the valve rod (11) in a transmission connection.

3. A hydrogenation valve with a multiple sealing structure according to claim 2, characterized in that: The upper cover component (2) includes a valve cover (21), a pressure cap (22), a spacer ring (23), a packing (24), and a pressure ring (25). A fixing block (13) is provided above the pressure cap (22), and the pressure cap (22) is fixedly connected to the fixing block (13). The pressure cap (22) is slidably connected to the valve stem (11). A spacer ring (23) is provided below the pressure cap (22), and the pressure cap (22) abuts against the spacer ring (23). A valve cover (21) is provided below the pressure cap (22), and the pressure cap (22) is fixedly connected to the valve cover (21). The valve cover (21) is slidably connected to the valve stem (11). A spacer ring (23) and a packing (24) are provided on the inner side of the valve cover (21). 21) The valve cover (21) is fixedly connected to the spacer ring (23), the valve cover (21) is fixedly connected to the packing (24), the valve cover (21) abuts against the trapezoidal ring (16), a pressure ring (25) is provided above the valve cover (21), the valve cover (21) is fixedly connected to the pressure ring (25), the packing (24) is provided below the spacer ring (23), the spacer ring (23) abuts against the packing (24), the spacer ring (23) is slidably connected to the valve stem (11), the valve stem (11) is slidably connected to the packing (24), the pressure ring (25) is fixedly connected to the main channel (3), the valve cover (21) is fixedly connected to the pressure self-tightening device (5), and the valve cover (21) is fixedly connected to the main channel (3).

4. A hydrogenation valve with a multiple sealing structure according to claim 3, characterized in that: The main channel (3) also includes a valve seat gasket (32). A pressure ring (25) and a valve cover (21) are provided above the valve body (31). The valve body (31) is fixedly connected to the pressure ring (25). The valve body (31) is fixedly connected to the valve cover (21). The valve body (31) is fixedly connected to the pressure self-tightening device (5). An air inlet flange (6) is provided on one side of the valve body (31). The valve body (31) is fixedly connected to the air inlet flange (6). An air outlet flange (7) is provided on the other side of the valve body (31). The valve body (31) is fixedly connected to the air outlet flange (7). A valve seat gasket (32) is provided on the air inlet of the valve body (31). The valve seat gasket (32) abuts against the valve disc (15). A check device (4) is provided in the pipe of the air outlet flange (7). The air outlet flange (7) is fixedly connected to the check device (4).

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