Stable type tee bend stop valve for extra-high pressure hydrogen

Abstract

This utility model belongs to the field of valve technology, specifically a stable ultra-high pressure hydrogen three-way shut-off valve, including a valve body with a rectangular structure. The valve body has a mounting hole on the top surface, an input hole on the bottom surface, and an output hole on the side. A valve cavity is located on the bottom surface of the mounting hole. The input hole communicates with the bottom surface of the valve cavity, and the output hole communicates with the side wall of the valve cavity. Packing and a gland are provided on the bottom surface of the mounting hole. A clamping nut is provided at the opening, and a drive valve rod is housed inside the clamping nut. The bottom end of the drive valve rod is threaded to the clamping nut, and the top end has a handle. A sealing valve rod is located inside the drive valve rod, which seals against the bottom surface of the valve cavity. A hexagonal nut is located at the other end of the drive valve rod. An anti-loosening mechanism is provided on the top surface of the valve body to prevent the clamping nut from loosening. Rotating the drive valve rod moves the sealing valve rod up and down, improving the sealing performance of the sealing valve rod. The anti-loosening mechanism prevents the clamping nut from loosening, thus ensuring the shut-off valve's sealing performance. This shut-off valve has strong sealing performance, high stability, and a long service life.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a stable ultra-high pressure hydrogen three-way shut-off valve. Background Technology

[0002] The ultra-high pressure hydrogen three-way shut-off valve is a key valve designed for switching and isolating three-way flow channels in ultra-high pressure hydrogen environments (typically 70MPa and above, such as 90MPa hydrogen refueling station systems). It needs to address the harsh challenges unique to hydrogen (hydrogen embrittlement, permeation, and extremely low leakage) while meeting the requirements of structural strength, sealing reliability, and flow channel switching function under ultra-high pressure.

[0003] The sealing stem of the currently used three-way shut-off valve is a rotary valve core assembly, which has a complex structure and many leakage points, and cannot meet the requirements for ultra-high pressure hydrogen transportation.

[0004] To address the aforementioned issues, this utility model document proposes a stable three-way shut-off valve for ultra-high pressure hydrogen applications. Utility Model Content

[0005] This invention provides a stable three-way shut-off valve for ultra-high pressure hydrogen, which has a simple structure, reduces leakage points, and improves the sealing performance of the shut-off valve.

[0006] This utility model provides the following technical solution:

[0007] A stable ultra-high pressure hydrogen three-way shut-off valve includes a valve body with a rectangular structure. The valve body has a mounting hole on its top surface, an input hole on its bottom surface, and output holes on opposite sides. A valve cavity is formed on the bottom surface of the mounting hole. The input hole communicates with the bottom surface of the valve cavity, and the output hole communicates with the side wall of the valve cavity. Packing material is fitted onto the bottom surface of the mounting hole. A pressure cap is provided above the packing material, and a tightening sleeve is threaded onto the opening. A drive valve stem is provided inside the tightening sleeve. The bottom end of the drive valve stem is threaded onto the inner wall of the tightening sleeve, and the top end passes through the tightening sleeve and is connected to a handle. A sealing valve stem is slidably arranged along the length of the drive valve stem. One end of the sealing valve stem passes through the packing material and is positioned inside the valve cavity to seal against the bottom surface of the valve cavity. The other end passes through the drive valve stem and is provided with a hexagonal nut.

[0008] The top surface of the valve body is also provided with an anti-loosening mechanism to prevent the clamping screw from loosening.

[0009] Furthermore, the clamping screw sleeve has an annular cylindrical structure, with an external thread on its bottom outer wall that connects to the mounting hole, and a hexagonal side wall on its top outer wall. The valve body has an anti-detachment hole on its top surface. The anti-detachment mechanism includes an anti-detachment bolt, an anti-detachment plate, and a support cylinder. The anti-detachment plate has a positioning hole and a limiting hole that matches the hexagonal side wall of the clamping screw sleeve. The anti-detachment bolt passes through the positioning hole and the support cylinder and is threaded to the anti-detachment hole. The anti-detachment plate is located above the support cylinder. The anti-detachment plate is fitted onto the hexagonal side wall of the clamping screw sleeve through the limiting hole.

[0010] Furthermore, the outer side wall of the top of the drive valve stem is provided with a milled surface, the bottom surface of the handle is provided with a locking hole, and the side wall is provided with a locking hole. The top of the drive valve stem is locked in the locking hole, and a locking bolt is threaded into the locking hole. The locking bolt abuts against the milled surface.

[0011] Furthermore, a metal washer is provided on the bottom surface of the mounting hole below the packing, and a flat washer is provided on the top of the sealing valve stem, the flat washer being located between the hexagonal nut and the top surface of the drive valve stem.

[0012] Furthermore, an inner bushing is also fitted on the sealing valve stem, the inner bushing being located inside the clamping screw sleeve and below the driving valve stem.

[0013] Furthermore, the valve body has a panel hole on its side.

[0014] Furthermore, both the input and output ports are equipped with gland heads, and a pressure ring is fitted onto the end of each gland head.

[0015] Furthermore, the valve body side is also provided with pressure relief holes at the positions of the pressure rings inside the input and output holes and the pressure caps inside the mounting holes.

[0016] In this invention, the sealing valve rod is moved up and down by rotating the valve rod, which improves the sealing performance of the valve rod movement. The anti-loosening mechanism prevents the tightening screw from loosening, thus improving the sealing performance of the gate valve. This gate valve has strong sealing performance, high stability, and long service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of a stable ultra-high pressure hydrogen three-way shut-off valve provided in an embodiment of the present invention;

[0018] Figure 2 This is a side view of a stable ultra-high pressure hydrogen three-way shut-off valve provided in an embodiment of the present invention.

[0019] Figure 3 for Figure 2 AA section view;

[0020] Figure 4This is a cross-sectional view of the valve body in a stable ultra-high pressure hydrogen three-way shut-off valve provided in an embodiment of the present invention.

[0021] Figure 5 A cross-sectional view of the drive valve stem in a stable ultra-high pressure hydrogen three-way shut-off valve provided in an embodiment of this utility model;

[0022] Figure 6 A cross-sectional view of the anti-detachment plate in a stable ultra-high pressure hydrogen three-way shut-off valve provided in this embodiment of the utility model;

[0023] Figure 7 This is a cross-sectional view of the handle in a stable ultra-high pressure hydrogen three-way shut-off valve provided in an embodiment of the present invention.

[0024] Figure label:

[0025] 1. Valve body; 101. Inlet port; 102. Outlet port; 103. Mounting hole; 104. Valve cavity; 105. Anti-detachment hole; 106. Panel hole; 107. Pressure relief hole; 2. Packing; 3. Gland; 4. Tightening sleeve; 5. Sealing valve stem; 6. Driving valve stem; 601. Milled surface; 7. Handle; 701. Locking hole; 702. Locking hole; 8. Hex nut; 9. Flat washer; 10. Inner bushing; 11. Gland head; 12. Pressure ring; 13. Anti-detachment plate; 1301. Limiting hole; 1302. Positioning hole; 14. Support cylinder; 15. Anti-detachment bolt; 16. Metal washer; 17. Locking bolt. Detailed Implementation

[0026] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0028] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0029] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0031] Example:

[0032] Reference Figures 1-7 As shown, a stable ultra-high pressure hydrogen three-way shut-off valve includes a valve body 1, which is rectangular in structure. The valve body 1 has a mounting hole 103 on its top surface, an input hole 101 on its bottom surface, and output holes 102 on opposite sides. A valve cavity 104 is formed on the bottom surface of the mounting hole 103. The input hole 101 communicates with the bottom surface of the valve cavity 104, and the output hole 102 communicates with the side wall of the valve cavity 104. Packing material 2 is fitted onto the bottom surface of the mounting hole 103, and a [missing information - likely a design feature] is positioned above the packing material 2. There is a pressure cap 3, and a tightening sleeve 4 is threadedly connected to the opening. The tightening sleeve 4 is provided with a drive valve stem 6. The bottom end of the drive valve stem 6 is threadedly connected to the inner wall of the tightening sleeve 4, and the top end passes through the tightening sleeve 4 and is connected to a handle 7. A sealing valve stem 5 is slidably arranged in the drive valve stem 6 along its length direction. One end of the sealing valve stem 5 passes through the packing 2 and is located in the valve cavity 104 to cooperate with the bottom surface of the valve cavity 104 for sealing. The other end passes through the drive valve stem 6 and is provided with a hexagonal nut 8.

[0033] The top surface of the valve body 1 is also provided with an anti-loosening mechanism to prevent the clamping screw sleeve 4 from loosening.

[0034] The valve is connected to an external hydrogen supply pipeline through inlet 101 and outlet 102. The packing 2 improves the sealing performance of the sealing valve stem 5 when it moves up and down, preventing hydrogen leakage from the side wall of the sealing valve stem 5 during this movement. The gland 3 ensures that the packing 2 is in a compressed state, tightly abutting against the side wall of the sealing valve stem 5, thus ensuring the sealing effect of the packing 2. The gland 3 is pressed and positioned by the clamping sleeve 4, thereby pressing the packing 2 tightly. An anti-loosening mechanism prevents the clamping sleeve 4 from loosening during use, which would reduce the clamping force of the clamping sleeve 4 on the gland 3, and consequently reduce the clamping force of the gland 3 on the packing 2, causing the packing 2 to loosen and fail to adhere tightly to the side wall of the sealing valve stem 5, resulting in high-pressure hydrogen leakage.

[0035] The handle 7 at the top of the drive valve stem 6 drives the drive valve stem 6 to rotate. The drive valve stem 6 is threadedly connected to the clamping sleeve 4, so that when the drive valve stem 6 rotates, it moves up and down inside the clamping sleeve 4. When the drive valve stem 6 moves downward, it presses down on the sealing valve stem 5, so that the sealing valve stem 5 and the bottom surface of the valve cavity 104 cooperate to seal and close the stop valve. When the drive valve stem 6 moves upward, it pushes the hexagonal nut 8 at the top of the sealing valve stem 5 to move upward, thereby driving the sealing valve stem 5 to move upward, so that the sealing valve stem 5 and the bottom surface of the valve cavity 104 separate, opening the stop valve.

[0036] Furthermore, the clamping screw sleeve 4 is an annular cylindrical structure, with an external thread on its bottom outer wall that is threaded to the mounting hole 103, and a hexagonal side wall on its top outer wall. The valve body 1 has an anti-detachment hole 105 on its top surface. The anti-detachment mechanism includes an anti-detachment bolt 15, an anti-detachment plate 13, and a support cylinder 14. The anti-detachment plate 13 has a positioning hole 1302 and a limiting hole 1301 that matches the hexagonal side wall of the clamping screw sleeve 4. The anti-detachment bolt 15 passes through the positioning hole 1302 and the support cylinder 14 and is threaded to the anti-detachment hole 105. The anti-detachment plate 13 is located above the support cylinder 14. The anti-detachment plate 13 is sleeved on the hexagonal side wall of the clamping screw sleeve 4 through the limiting hole 1301.

[0037] The bottom thread of the clamping sleeve 4 is installed in the mounting hole 103. The hexagonal sidewall facilitates the rotation of the clamping sleeve 4 by the worker when assembling the gate valve, and also facilitates the restriction of the rotation of the clamping sleeve 4 by the limiting hole 1301. One end of the anti-detachment plate 13 is positioned by the anti-detachment bolt 15, and the anti-detachment plate 13 is sleeved on the outside of the clamping sleeve 4 through the limiting hole 1301. If the clamping sleeve 4 is loose, the anti-detachment plate 13 needs to be rotated. The rotation of the anti-detachment plate 13 is restricted by the anti-detachment bolt 15, thereby restricting the rotation of the clamping sleeve 4, thus preventing the clamping sleeve 4 from loosening, and thus ensuring the sealing effect of the packing 2 on the sealing valve stem 5. The support cylinder 14 supports the anti-detachment plate 13, so that the anti-detachment plate 13 can be positioned in the position of the hexagonal sidewall of the clamping sleeve 4.

[0038] Furthermore, the outer side wall of the top end of the drive valve stem 6 is provided with a milled surface 601, the bottom surface of the handle 7 is provided with a locking hole 701, and the side wall is provided with a locking hole 702. The top end of the drive valve stem 6 is locked in the locking hole 701, and a locking bolt 17 is threadedly connected to the locking hole 702. The locking bolt 17 abuts against the milled surface 601.

[0039] The end of the drive valve stem 6 is locked in the locking hole 701, and the top of the sealing valve stem 5 is also locked in the locking hole 701. The locking bolt 17 abuts against the milled surface 601, so that the handle 7 is connected to the drive valve stem 6.

[0040] Furthermore, a metal washer 16 is provided on the bottom surface of the mounting hole 103 below the packing 2, and a flat washer 9 is provided on the top of the sealing valve stem 5. The flat washer 9 is located between the hexagonal nut 8 and the top surface of the drive valve stem 6.

[0041] The packing 2 is supported by the metal washer 16 to ensure that the packing 2 will not deform when it is pressed by the gland 3, thus ensuring the sealing performance of the packing 2 against the side wall of the valve stem 5 and thus ensuring the sealing effect of the gate valve.

[0042] By pressing the flat washer 9 with the hexagonal nut 8, the flat washer 9 abuts against the end face of the drive valve stem 6, thereby preventing the hexagonal nut 8 at the end of the sealing valve stem 5 from loosening, and enabling the packaged drive valve stem 6 to drive the sealing valve stem 5 to move.

[0043] Furthermore, an inner liner 10 is also fitted on the sealing valve stem 5. The inner liner 10 is located inside the clamping screw sleeve 4 and below the driving valve stem 6.

[0044] After prolonged use, the sealing valve stem 5 may become damaged due to friction as it rotates within the driving valve stem 6. The inner bushing 10 improves the stability of the sealing valve stem 5 during movement, thereby extending the service life of the gate valve.

[0045] Furthermore, the valve body 1 has a panel hole 106 on its side.

[0046] The panel hole 106 facilitates the installation and fixing of the shut-off valve in the usage position.

[0047] Furthermore, both the input hole 101 and the output hole 102 are provided with gland heads 11, and a pressure ring 12 is sleeved on the end of the gland head 11.

[0048] The gland 11 is connected to an external hydrogen delivery pipeline, and the pressure ring 12 improves the sealing of the gland 11 in the inlet port 101 and outlet port 102 to prevent hydrogen leakage.

[0049] Furthermore, a pressure relief hole 107 is provided on the side of the valve body 1 at the position of the pressure ring 12 inside the input hole 101 and the output hole 102, and the pressure cover 3 inside the mounting hole 103.

[0050] The high pressure in the valve chamber 104 can be released through the pressure relief hole 107 to prevent excessive pressure in the valve chamber 104 from causing unstable installation of the gland head 11 and the clamping screw sleeve 4, and preventing the gland head 11 from falling off from the input hole 101 or the output hole 102, thereby improving the safety of the shut-off valve.

[0051] In use, the metal washer 16 and packing 2 are placed sequentially into the mounting hole 103, and then tightened together with the pressure cap 3. The tightening sleeve 4 is then threaded into the mounting hole 103 to further tighten the packing 2. The anti-detachment plate 13 is then fitted onto the hexagonal side wall of the tightening sleeve 4 through the limiting hole 1301. The anti-detachment bolt 15 passes through the positioning hole 1302 and the support cylinder 14 on the anti-detachment plate 13, and is then threaded into the anti-detachment hole 105 to fix the anti-detachment plate 13, thus restricting the tightening sleeve 4. The shut-off valve is then installed and fixed in its operating position through the panel hole 106. The delivery pipeline is connected through the gland 11, which is installed in the inlet hole 101 and the outlet hole 102, thus installing the shut-off valve on the hydrogen delivery pipeline. When transporting ultra-high pressure hydrogen, rotating handle 7 causes the drive valve rod 6 to rotate, moving it upwards and simultaneously moving the sealing valve rod 5 upwards. The bottom end of the sealing valve rod 5 separates from the bottom surface of the valve cavity 104, thus connecting the inlet port 101 with the valve cavity 104. Ultra-high pressure hydrogen enters the valve cavity 104 through the inlet port 101 and then enters the outlet port 102 through the valve cavity 104, connecting the hydrogen transport pipeline. After the hydrogen transport is completed, rotating handle 7 in the opposite direction causes the drive valve rod 6 to move downwards, moving the sealing valve rod 5 downwards. This causes the bottom end of the sealing valve rod 5 to engage with the bottom surface of the valve cavity 104, sealing the connection between the inlet port 101 and the valve cavity 104. Hydrogen cannot enter the valve cavity 104, thus cutting off the hydrogen transport.

[0052] In actual use, the anti-loosening hole 105 on the top surface of the valve body 1 is connected to the panel hole 106 on the side of the valve body 1. Through the cooperation of the anti-loosening bolt 15 and the bolt used to install the valve body 1, it can effectively prevent the anti-loosening bolt 15 from loosening, and also prevent the bolt fixing the valve body 1 from loosening, thereby improving the stability of the gate valve installation position. It also avoids the anti-loosening bolt 15 from loosening after long-term use of the gate valve, in which case the anti-loosening plate 13 will not be able to play an anti-loosening role on the compression sleeve 4.

[0053] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A stable ultra-high pressure hydrogen three-way shut-off valve, characterized in that, The valve includes a valve body, which is rectangular in structure. It has a mounting hole on its top surface, an input hole on its bottom surface, and output holes on opposite sides. A valve cavity is formed on the bottom surface of the mounting hole. The input hole communicates with the bottom surface of the valve cavity, and the output hole communicates with the side wall of the valve cavity. Packing material is fitted into the bottom surface of the mounting hole. A pressure cap is provided above the packing material, and a tightening sleeve is threaded into the opening. A drive valve stem is located inside the tightening sleeve. The bottom end of the drive valve stem is threaded into the inner wall of the tightening sleeve, and the top end passes through the tightening sleeve and is connected to a handle. A sealing valve stem is slidably arranged along the length of the drive valve stem. One end of the sealing valve stem passes through the packing material and is positioned inside the valve cavity to seal against the bottom surface of the valve cavity. The other end passes through the drive valve stem and is fitted with a hexagonal nut. The top surface of the valve body is also provided with an anti-loosening mechanism to prevent the clamping screw from loosening.

2. The stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, The clamping screw sleeve has an annular cylindrical structure. Its bottom outer wall has an external thread that connects to the mounting hole. Its top outer wall is a hexagonal sidewall. The valve body has an anti-detachment hole on its top surface. The anti-detachment mechanism includes an anti-detachment bolt, an anti-detachment plate, and a support cylinder. The anti-detachment plate has a positioning hole and a limiting hole that matches the hexagonal sidewall of the clamping screw sleeve. The anti-detachment bolt passes through the positioning hole and the support cylinder and is threaded to the anti-detachment hole. The anti-detachment plate is located above the support cylinder. The anti-detachment plate is sleeved on the hexagonal sidewall of the clamping screw sleeve through the limiting hole.

3. The stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, The outer side wall of the top of the drive valve stem is provided with a milled surface, the bottom surface of the handle is provided with a locking hole, and the side wall is provided with a locking hole. The top of the drive valve stem is locked in the locking hole, and a locking bolt is threaded into the locking hole. The locking bolt abuts against the milled surface.

4. A stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, A metal washer is provided on the bottom surface of the mounting hole below the packing, and a flat washer is provided on the top of the sealing valve stem. The flat washer is located between the hexagonal nut and the top surface of the drive valve stem.

5. A stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, The sealing valve stem is also fitted with an inner liner, which is located inside the clamping screw sleeve and below the driving valve stem.

6. A stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, The valve body has a panel hole on its side.

7. A stable ultra-high pressure hydrogen three-way shut-off valve according to claim 1, characterized in that, Both the input and output ports are equipped with gland heads, and a pressure ring is fitted onto the end of each gland head.

8. A stable ultra-high pressure hydrogen three-way shut-off valve according to claim 7, characterized in that, The valve body side is also provided with pressure relief holes at the positions of the pressure rings inside the input and output holes and the pressure caps inside the mounting holes.

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