Liquid hydrogen triple-eccentric replaceable ball valve

Abstract

The invention belongs to the technical field of valves, particularly relates to a liquid hydrogen three-eccentric replaceable ball valve, and aims to overcome the defects that in the prior art, a valve element of a three-eccentric ball valve is inconvenient to disassemble and maintain, and normal conveying of liquid hydrogen is affected when the three-eccentric ball valve is maintained. Two sliding plates are symmetrically connected to the supporting rail in a sliding mode, the same valve body is fixedly installed on the two sliding plates in a penetrating mode, the number of the valve bodies is two, so that when the ball valve is overhauled, the other ball valve can be conveniently replaced for use, a fixedly-installed valve seat is arranged in each valve body, and each valve seat is of an annular structure; by arranging the two valve bodies, normal conveying of liquid hydrogen cannot be affected in the overhauling process of the valve bodies, meanwhile, when the valve bodies are overhauled, the valve clacks can be conveniently and rapidly disassembled and assembled, daily maintenance can be conveniently conducted on the valve bodies, and therefore good use convenience is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a liquid hydrogen triple-eccentric replaceable ball valve. Background Art

[0002] In transmission systems for cryogenic media like liquid hydrogen, triple-offset ball valves are critical control components whose performance and reliability are crucial. However, traditional triple-offset ball valve designs suffer from numerous shortcomings, including difficult maintenance, complex replacement, poor sealing performance, and inflexible docking mechanisms. These issues not only affect ball valve efficiency but also increase system maintenance costs and safety risks.

[0003] First, traditional triple-eccentric ball valves often require disassembly of numerous components for maintenance or replacement, making the operation cumbersome and time-consuming. This not only increases labor intensity but can also lead to component damage or reduced sealing performance due to improper operation. Therefore, designing a liquid hydrogen ball valve that is easy to maintain and replace has become a pressing issue for the industry.

[0004] Secondly, the traditional triple-eccentric ball valve needs regular maintenance during actual use. During the maintenance process, the ball valve needs to be disassembled in most cases, which often interrupts the delivery of liquid hydrogen. Therefore, during factory production activities, interrupting the delivery of liquid hydrogen will inevitably affect the normal production efficiency of the factory.

[0005] In response to the above problems, the present invention document proposes a liquid hydrogen triple-eccentric replaceable ball valve. Summary of the Invention

[0006] The present invention provides a liquid hydrogen triple-eccentric replaceable ball valve, which solves the shortcomings of the prior art that the valve core of the triple-eccentric ball valve is inconvenient to disassemble and repair and that maintenance of the triple-eccentric ball valve affects the normal transportation of liquid hydrogen.

[0007] The present invention provides the following technical solutions:

[0008] A liquid hydrogen triple-eccentric replaceable ball valve comprises a base plate, a support rail being fixedly mounted on the top of the base plate, two slides being symmetrically slidably connected to the support rail, a valve body being fixedly mounted on the two slides, and two valve bodies being provided so that another ball valve can be conveniently replaced when the ball valve is repaired. A fixed valve seat is provided in the valve body, and the valve seat is annular in structure, and the inner wall is arc-shaped. A valve disc is also mounted on the inner wall of the valve body via a positioning mechanism, and the positioning mechanism can be disassembled to facilitate the inspection and maintenance of the valve disc. The valve disc is in the shape of an arc-shaped spherical surface, and one side of the valve disc extends into the valve seat to maintain a tight fit with the inner wall of the valve seat.

[0009] A valve handle mechanism for controlling the rotation and adjustment of the valve disc is provided on the top of the valve body, and the bottom of the valve plate mechanism extends into the valve body and is clamped with the positioning mechanism;

[0010] A docking mechanism for connecting to external pipelines is also installed on the bottom plate. The two valve bodies can be docked with the two docking mechanisms respectively through lateral movement adjustment, so that when one of the ball valves is being repaired, the other ball valve can be connected to the docking mechanism.

[0011] In one possible design, the positioning mechanism includes:

[0012] The positioning tube is fixedly installed on the bottom inner wall of the valve body;

[0013] The top and bottom ends of the mounting tube are fixedly installed with limit tubes, and the ends of the two limit tubes away from each other are fixedly installed with connecting arms, one side of the connecting arm is fixedly connected to the valve disc, and the connecting arm located below is placed on the positioning tube. The two limit tubes are slidably connected with the pin and the clamping column respectively, the pin is inserted into the positioning tube and rotates with the positioning tube, the top of the clamping column is a rectangular structure, which can be connected to the valve handle mechanism and can be rotated after receiving the driving force of the valve handle mechanism. The clamping column is clamped and matched with the valve handle mechanism, and two movable holes are symmetrically opened on the inner walls on both sides of the mounting tube. The mounting tube is installed with an elastic support assembly, and the elastic support mechanism passes through the four movable holes respectively. The ends of the clamping column and the pin close to each other are connected to the supporting elastic assembly.

[0014] In one possible design, the elastic support assembly includes:

[0015] The two push rings are both sleeved on the mounting tube. The push rings are fixed with limit plates that pass through the corresponding two movable holes. The ends of the latch and the clamping column that are close to each other are fixedly connected to the two limit plates respectively.

[0016] The mounting ring is fixedly sleeved on the center position of the mounting tube. First compression springs are welded on both sides of the mounting ring, and one end of the first compression spring is welded to one side of the corresponding push ring.

[0017] In one possible design, the valve handle mechanism includes:

[0018] The valve stem passes through the top inner wall of the valve body and is rotatably sealed with the top inner wall of the valve body through a sealing ring. A connecting column is fixedly installed on the bottom end of the valve stem. The bottom end of the connecting column is provided with a rectangular slot that matches the rectangular structure of the top end of the clamping column. The top end of the clamping column is inserted into the rectangular slot and clamped with the inner wall of the rectangular slot.

[0019] A valve handle located above the valve body is fixed on the valve stem by bolts. The valve stem is rotated by twisting the valve handle to drive the mounting tube to rotate, thereby driving the valve disc to rotate and opening or closing the ball valve.

[0020] In one possible design, a sliding hole is provided on the valve handle, and a pull plate is slidably connected therein. A clamping plate is fixedly installed on the bottom of one side of the pull plate by welding. The side of the clamping plate away from the pull plate is a curved arc structure. A clamping ring is also fixedly installed on the top of the valve body by welding. The axis of the valve stem coincides with the axis of the clamping ring. Two slots with an angle of 180° are symmetrically provided on the outside of the clamping ring. The clamping plate moves in an arc around the valve stem.

[0021] In one possible design, a limit rod is fixedly installed on the inner wall of the sliding hole, the limit rod passes through the pull plate and is slidably connected to the pull plate, and a second compression spring located on one side of the pull plate is sleeved on the limit rod, and the two ends of the second compression spring are respectively fixedly connected to the inner wall of one side of the sliding hole and the top of one side of the pull plate.

[0022] In one possible design, the docking mechanism includes:

[0023] The mounting frame is installed on the bottom plate, and support holes are opened on the inner walls of both sides of the mounting frame;

[0024] Two butt joints, each passing through the corresponding support hole and slidably connected to the inner wall of the support hole. The two butt joints are movable. When the valve body is moved between the two butt joints, the two butt joints can be tightly docked with both sides of the valve body through the two butt joints that are close to each other. The butt joints are used to connect to the external delivery pipeline of liquid hydrogen;

[0025] The two transmission components respectively penetrate the inner walls on both sides of the mounting frame and are connected to the inner walls on both sides of the mounting frame. The transmission components are connected to the corresponding docking tubes to drive the docking tubes to move and to position the docking tubes.

[0026] In one possible design, the transmission assembly includes a gear ring rotatably connected to one side of the mounting frame, a plurality of threaded tubes symmetrically extending through an inner wall of one side of the mounting frame and rotatably connected thereto, a transmission screw threadedly extending through the threaded tubes, one end of the transmission screw being welded to a corresponding butt joint tube, a gear being fixedly sleeved on the threaded tubes by a key connection, and the plurality of gears being meshed with the gear ring;

[0027] A mounting arm is provided at the bottom of the gear ring, and a plug rod is slidably connected to the mounting arm. Positioning grooves are provided at the bottom of both sides of the mounting frame. One end of the plug rod is inserted into the positioning groove, so that the plug rod and the positioning groove are plugged and fixed to realize braking of the gear ring;

[0028] Multiple stop wheels are symmetrically connected to both sides of the mounting frame, and the multiple stop wheels on the same side are used to support and limit the gear ring;

[0029] A tension spring is sleeved on the insertion rod, and two ends of the tension spring are respectively welded to one side of the mounting arm and the other end of the insertion rod.

[0030] In one possible design, a support ring is welded inside the butt joint tube, a pressing assembly is connected to the support ring, a butt joint ring is installed on one side of the pressing assembly, sealing rings are welded at both side openings in the valve body, and one side of the butt joint ring extends into the sealing ring and fits tightly with the inner wall of the sealing ring.

[0031] In one possible design, the pressing assembly includes a plurality of support rods and a movable ring, wherein the plurality of support rods all pass through the support ring and are slidably connected to the support ring, the plurality of support rods are arranged at equal intervals, one end of the plurality of support rods is welded to one side of the movable ring, and the movable ring is slidably connected to the inner wall of the butt tube;

[0032] A third compression spring is sleeved on the support rod, and two ends of the third compression spring are fixedly connected to one side of the moving ring and one side of the support ring respectively.

[0033] In the present invention, the valve body to be used according to needs is moved between the two butt joints, and the other valve body needs maintenance. Then the gear ring is rotated, and the multiple threaded tubes are driven to rotate by meshing with multiple gears. Under the action of the threaded transmission, the transmission screw pushes the butt joint to approach the valve body until the butt joint and the valve body are tightly fitted. When the butt joint and the valve body are in close contact, the insertion rod is inserted into the positioning groove of the mounting bracket under the action of the tension spring, and the gear ring is braked to fix the position of the butt joint. In the process of the butt joint approaching the valve body, the butt joint ring is pushed into the sealing ring. When the butt joint ring is tightly fitted with the inner wall of the sealing ring When the cam is in a tensioned state, multiple third compression springs are in a tensioned state, and their elastic force is used to maintain a tight fit between the docking ring and the sealing ring to ensure sealing. The valve handle is twisted to drive the valve stem to rotate, and the connecting column at the bottom of the valve stem cooperates with the rectangular structure at the top of the clamping column through the rectangular clamping slot to drive the clamping column to rotate. The clamping column drives the valve disc to rotate through the connecting arm to open or close the ball valve. When the valve disc needs to be positioned, the valve handle will drive the clamping plate to move to the corresponding slot position, and then the pull plate can be loosened. The second compression spring in a tensioned state can push the pull plate to move, thereby driving the clamping plate to move so that it can be movably clamped with the slot on the clamping ring. When the cam is in a closed position and the valve disc is in a closed position, the cam is in a closed position and the valve handle is in a closed position, and the cam is in a closed position and the valve disc is in a closed position, the cam is in a closed position and the valve disc is in a closed position, and ...

[0034] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0035] Beneficial effects: In the present invention, by providing a positioning mechanism, the latch can be inserted into the positioning tube, and the clamping column and the valve handle mechanism can be clamped together, so that the valve disc can be positioned and installed. At the same time, when the latch and the positioning tube are plugged and matched, the latch can rotate freely. Therefore, when the valve handle mechanism is operated to drive the clamping column to rotate, the valve disc can be driven to rotate, so that the ball valve can be opened or closed. At the same time, the clamping column and the latch can be telescopically moved. Therefore, when the valve disc needs to be disassembled, it can be disassembled by moving the clamping column and the latch.

[0036] In the present invention, the valve handle mechanism is provided, which can be clamped by using a rectangular clamping groove and a clamping column with a rectangular top end. In this way, when the valve stem rotates, the clamping column can be driven to rotate stably without slipping. Moreover, the clamping column and the rectangular clamping groove are connected in a plug-in clamping manner, which can provide good convenience when the valve disc is disassembled and repaired.

[0037] In the present invention, by providing a docking mechanism, after the valve body to be used is moved between the two docking tubes, the corresponding docking tubes can be moved by driving the two transmission components, so that the docking tubes can be stably docked with the valve body.

[0038] The present invention can provide two valve bodies without affecting the normal transportation of liquid hydrogen during the inspection and maintenance of the valve body. At the same time, when the valve body is inspected and maintained, the valve disc can be quickly disassembled and assembled, thereby facilitating daily maintenance of the valve body, so it has good ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional schematic diagram of the overall structure of a liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0040] Figure 2 A three-dimensional schematic diagram of the connection structure between two slides and two valve bodies of a liquid hydrogen triple-eccentric replaceable ball valve provided by an embodiment of the present invention;

[0041] Figure 3 A three-dimensional schematic diagram of the internal structure of two valve bodies of a liquid hydrogen triple-eccentric replaceable ball valve provided by an embodiment of the present invention;

[0042] Figure 4 A three-dimensional schematic diagram of the cross-sectional structure of the valve body of a liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0043] Figure 5 A three-dimensional schematic diagram of the valve stem and clamping column separation structure of a liquid hydrogen triple-eccentric replaceable ball valve provided by an embodiment of the present invention;

[0044] Figure 6A bottom-up three-dimensional schematic diagram of the valve stem, connecting column, clamping plate, and clamping ring connection structure of a liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0045] Figure 7 A three-dimensional schematic diagram of the cross-sectional structure of the mounting pipe of the liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0046] Figure 8 A three-dimensional schematic diagram of the base plate, mounting frame, and two butt-joint pipe connection structures of a liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0047] Figure 9 A three-dimensional schematic diagram of the connection structure between the butt joint pipe and the butt joint ring of the liquid hydrogen triple-eccentric replaceable ball valve provided in an embodiment of the present invention;

[0048] Figure 10 This is a three-dimensional schematic diagram of the cross-sectional structure of the butt joint of the liquid hydrogen triple-eccentric replaceable ball valve provided by an embodiment of the present invention.

[0049] Reference numerals:

[0050] 1. Bottom plate; 2. Support rail; 3. Slide plate; 4. Valve body; 41. Sealing ring; 5. Valve seat; 6. Positioning tube; 7. Mounting tube; 71. Limiting tube; 72. Moving hole; 73. Limiting plate; 74. Push ring; 75. Latch; 76. Clamping column; 77. First compression spring; 78. Connecting arm; 79. Valve disc; 710. Mounting ring; 8. Valve stem; 81. Connecting column; 82. Rectangular slot; 83. Valve handle; 84. Pull plate; 85, clamping plate; 86, retaining ring; 87, limit rod; 88, second compression spring; 9, mounting frame; 91, docking tube; 92, moving ring; 93, support ring; 94, support rod; 95, docking ring; 96, third compression spring; 10, transmission screw; 101, threaded tube; 102, gear; 103, gear ring; 104, stop wheel; 105, mounting arm; 106, insertion rod; 107, tension spring. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0052] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. 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. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0053] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0054] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0055] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in 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 "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0056] Example 1: Reference Figure 1-10 A ball valve comprises a base plate 1, with a support rail 2 fixedly mounted on top. Two slides 3 are symmetrically slidably connected to the support rail 2. A common valve body 4 is fixedly mounted on these two slides 3. This design allows one valve body 4 to be used while undergoing maintenance, ensuring continuous system operation.

[0057] like Figure 3 and Figure 4 As shown, each valve body 4 is fixedly mounted with a valve seat 5. This valve seat 5 is annular in structure, with an arc-shaped inner wall. A valve flap 79 is mounted on the inner wall of the valve body 4 via a positioning mechanism. This positioning mechanism facilitates the removal of the valve flap 79 for easy maintenance. The valve flap 79 has an arc-shaped spherical surface, with one side extending into the valve seat 5, maintaining a tight fit with the inner wall of the valve seat 5, thereby ensuring the valve's tightness.

[0058] like Figure 4 As shown, a valve handle mechanism is located at the top of the valve body 4 to control the rotation of the valve disc 79. The bottom of the valve handle mechanism extends into the valve body 4 and engages with the positioning mechanism. By operating the valve handle mechanism, the valve disc 79 can be driven to rotate, thereby opening or closing the ball valve.

[0059] A docking mechanism for connecting to external pipelines is also mounted on the base plate 1. The two valve bodies 4 can be adjusted laterally to dock with the two docking mechanisms. This allows one valve body 4 to be connected to the docking mechanism while undergoing maintenance, ensuring that the delivery of liquid hydrogen is not affected.

[0060] Next, the specific structure of the positioning mechanism is described in detail. Figure 4 、 Figure 5 and Figure 7As shown, the positioning mechanism includes a positioning tube 6 fixedly mounted on the bottom inner wall of the valve body 4, and a mounting tube 7. The top and bottom ends of the mounting tube 7 are fixedly mounted with limiting tubes 71, and the ends of the two limiting tubes 71 that are away from each other are fixedly mounted with connecting arms 78, and one side of the connecting arm 78 is fixedly connected to the valve flap 79. The connecting arm 78 located at the bottom is mounted on the positioning tube 6. In the two limiting tubes 71, a latch 75 and a clamping column 76 are respectively slidably connected. The latch 75 is inserted into the positioning tube 6 and rotates with the positioning tube 6. The top of the clamping column 76 is a rectangular structure, which can be clamped and matched with the valve handle mechanism. Two movable holes 72 are symmetrically opened on the inner walls on both sides of the mounting tube 7. The mounting tube 7 is also equipped with an elastic support component, which passes through the four movable holes 72 respectively and is connected to the ends of the clamping column 76 and the latch 75 that are close to each other. In this way, by inserting the latch 75 into the positioning tube 6 and simultaneously engaging the clamping column 76 with the valve handle mechanism, the valve disc 79 can be positioned and installed. Furthermore, when the latch 75 is engaged with the positioning tube 6, the latch 75 can rotate freely. Therefore, when the valve handle mechanism is operated to drive the clamping column 76 to rotate, the valve disc 79 can also rotate, thereby opening or closing the ball valve. Furthermore, the clamping column 76 and latch 75 can telescopically move, so if the valve disc 79 needs to be removed, it can be achieved by moving the clamping column 76 and latch 75.

[0061] like Figure 5 As shown, the elastic support assembly includes two push rings 74, both of which are sleeved on the mounting tube 7. A limit plate 73 is fixedly installed in the push ring 74, which passes through the corresponding two movable holes 72. The ends of the latch 75 and the clamping column 76 that are close to each other are fixedly connected to the two limit plates 73 respectively. A mounting ring 710 is fixedly sleeved on the center position of the mounting tube 7. A first compression spring 77 is welded on both sides of the mounting ring 710, and one end of the first compression spring 77 is welded to one side of the corresponding push ring 74. By pushing the two push rings 74, the latch 75 and the clamping column 76 can be driven to retract and move into the corresponding limit tube 71, so that the clamping column 76 can be disengaged from the valve handle mechanism and the latch 75 can be moved out of the positioning tube 6, thereby realizing the disassembly of the mounting tube 7. In addition, the two first compression springs 77 can elastically support the two push rings 74, so that they can elastically support the pin 75 and the clamping column 76 respectively without being affected by external forces, so that the pin 75 can be stably inserted into the positioning tube 6, and the clamping column 76 can be stably clamped with the valve handle mechanism.

[0062] like Figure 6As shown, the valve handle mechanism includes a valve stem 8 extending through the top inner wall of the valve body 4. The valve stem 8 is rotatably and hermetically connected to the top inner wall of the valve body 4 via a sealing ring. A connecting post 81 is fixedly mounted at the bottom end of the valve stem 8. The bottom end of the connecting post 81 defines a rectangular slot 82 that mates with the rectangular structure at the top of the retaining post 76. The top of the retaining post 76 is inserted into the rectangular slot 82 and securely engages with the inner wall of the slot 82. A valve handle 83, located above the valve body 4, is also bolted onto the valve stem 8. Twisting the valve handle 83 rotates the valve stem 8, thereby driving the mounting tube 7 to rotate, further driving the valve disc 79 to rotate, thereby opening or closing the ball valve. The use of the rectangular slot 82 and the retaining post 76 with a rectangular top ensures that the retaining post 76 rotates stably and without slipping when the valve stem 8 rotates. Furthermore, the clamping column 76 and the rectangular clamping slot 82 are connected in a plug-in and clamping manner, so that the valve flap 79 can be easily disassembled and repaired.

[0063] like Figure 6 As shown, the valve handle 83 is provided with a sliding hole, through which a pull plate 84 is slidably connected. A clamping plate 85 is welded to the bottom of one side of the pull plate 84. The side of the clamping plate 85 facing away from the pull plate 84 is a curved arc structure. A clamping ring 86 is also welded to the top of the valve body 4. The axis of the valve stem 8 and the axis of the clamping ring 86 coincide. Two slots symmetrically arranged at an angle of 180° are defined on the outer side of the clamping ring 86. The clamping plate 85 can be flexibly engaged with the two slots by moving in an arc shape 180° around the valve stem 8, thereby positioning the valve handle 83. Rotating the valve handle 83 drives the valve stem 8, thereby driving the valve disc 79 to move. When the valve disc 79 needs to be positioned, the clamping plate 85 can be moved to a position corresponding to the slot. The clamping plate 85 is then pushed into the slot by the pull plate 84, thereby braking the valve handle 83 and further stably limiting the position of the valve disc 79.

[0064] like Figure 6 As shown, a limit rod 87 is fixedly mounted on the inner wall of the sliding hole. Limit rod 87 extends through and is slidably connected to pull plate 84. A second compression spring 88 is sleeved on limit rod 87 and positioned on one side of pull plate 84. The two ends of second compression spring 88 are respectively fixedly connected to the inner wall of the sliding hole and the top of one side of pull plate 84. Limit rod 87 provides lateral sliding support for pull plate 84, and the elastic force of second compression spring 88 elastically limits the pull plate 84. This ensures a stable engagement when retaining plate 85 is engaged with the slot, thereby stably limiting the position of valve handle 83.

[0065] like Figure 1As shown, the docking mechanism includes a mounting frame 9 mounted on the base plate 1. Support holes are defined on the inner walls of both sides of the mounting frame 9. Two docking tubes 91 extend through the corresponding support holes and are slidably connected to the inner walls of the support holes. These two docking tubes 91 are movable so that when the valve body 4 is moved between the two docking tubes 91, the two adjacent docking tubes 91 tightly dock with the two sides of the valve body 4. The docking tubes 91 are used to connect to external liquid hydrogen delivery pipelines.

[0066] like Figure 1 As shown, two transmission assemblies extend through and connect to the inner walls of the mounting frame 9. The transmission assemblies connect to corresponding docking tubes 91 to drive the docking tubes 91 for movement and positioning. After the valve body 4 is moved between the two docking tubes 91, the two transmission assemblies can be driven to move the corresponding docking tubes 91, thereby ensuring stable docking between the docking tubes 91 and the valve body 4.

[0067] like Figure 1 and Figure 8 As shown, the transmission assembly includes a gear ring 103 rotatably connected to one side of the mounting frame 9. Multiple threaded tubes 101 are symmetrically and rotatably connected to the inner wall of one side of the mounting frame 9. Drive screws 10 are threadedly connected through the threaded tubes 101, one end of which is welded to the corresponding docking tube 91. Gears 102 are fixedly mounted on the threaded tubes 101 via a keyed connection, and multiple gears 102 mesh with the gear ring 103. A mounting arm 105 is provided at the bottom of the gear ring 103, and a plunger 106 is slidably connected to the mounting arm 105. Positioning slots are provided on the bottom of each side of the mounting frame 9. One end of the plunger 106 is inserted into the positioning slot, allowing the plunger 106 to engage with the positioning slot to brake the gear ring 103. Multiple stop wheels 104 are also symmetrically and rotatably connected to both sides of the mounting frame 9. Multiple stop wheels 104 located on the same side are used to support and limit the gear ring 103. A tension spring 107 is also mounted on the insertion rod 106, with its ends welded to one side of the mounting arm 105 and the other end of the insertion rod 106, respectively. By rotating the gear ring 103, the multiple threaded tubes 101 can be driven to rotate under the meshing transmission action of the multiple gears 102. As the threaded tubes 101 rotate, they can be driven by the threaded transmission action of the drive screw 10 to drive the docking tube 91 toward one side of the valve body 4 until the docking tube 91 and the valve body 4 are tightly fitted. At this point, the insertion rod 106 can move to a position corresponding to the positioning slot. Then, by releasing the insertion rod 106, the tension spring 107, which is in a stressed state, can drive the insertion rod 106 into the positioning slot, positioning the gear ring 103.

[0068] The present application can be used in the field of valve technology, and can also be used in other fields applicable to the present application.

[0069] Example 2: Reference Figure 9-10 Based on the first embodiment, a liquid hydrogen triple-eccentric replaceable ball valve is described, which is applied to the field of valve technology. In the design of this liquid hydrogen triple-eccentric replaceable ball valve, butt joint 91 is a key component, responsible for connecting the valve body 4 to other pipelines. To ensure the sealing and stability of the connection, a special structural design is implemented inside butt joint 91.

[0070] like Figure 9 and Figure 10 As shown, first, a support ring 93 is welded inside the butt joint 91. This support ring 93 not only provides support but also provides a connection point for the subsequent pressing assembly. The pressing assembly design includes multiple support rods 94 and a movable ring 92. These support rods 94 penetrate the support ring 93 and form a sliding connection with it. These support rods 94 are evenly spaced on the support ring 93 to ensure uniform pressing.

[0071] like Figure 9 and Figure 10 As shown, one end of the support rod 94 is welded to one side of the movable ring 92, so that the movable ring 92 can move with the movement of the support rod 94. At the same time, the movable ring 92 forms a sliding connection with the inner wall of the docking tube 91, so that the movable ring 92 can slide freely inside the docking tube 91.

[0072] like Figure 9 and Figure 10 As shown, a third compression spring 96 is also sleeved on the support rod 94. The two ends of these third compression springs 96 are fixedly connected to one side of the movable ring 92 and one side of the support ring 93, respectively. Thus, when the docking ring 95 is in contact with the inner wall of the sealing ring 41, the third compression springs 96 are subjected to pressure and are in a stressed state. The stressed third compression springs 96 use their elastic force to apply a thrust to the movable ring 92. This thrust further pushes the docking ring 95 into a tight fit with the sealing ring 41, thereby ensuring a tight connection.

[0073] We have welded sealing rings 41 at the openings on both sides of the valve body 4. When the docking tube 91 approaches the valve body 4, the docking ring 95 will first contact the sealing ring 41, and as the docking tube 91 moves further, the docking ring 95 will be pushed into the sealing ring 41. During this process, the third compression spring 96 will gradually be compressed and store energy. When the docking tube 91 is in close contact with the valve body 4, the docking ring 95 has completely moved into the sealing ring 41 and is tightly fitted with the inner wall of the sealing ring 41. At this time, the third compression spring 96 is in a state of maximum stress, and its elastic force will continue to push the docking ring 95 to maintain a tight fit with the sealing ring 41, thereby ensuring the stability and sealing of the connection.

[0074] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0075] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. The embodiments of the present invention and the features therein can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A liquid hydrogen triple eccentric replaceable ball valve, comprising a base plate (1), a support rail (2) fixedly mounted on the top of the base plate (1), two slides (3) symmetrically slidably connected to the support rail (2), a valve body (4) fixedly mounted through the two slides (3), and two valve bodies (4) are provided so that another ball valve can be used in place of the other when the ball valve is repaired. The invention is characterized in that: A fixed valve seat (5) is provided in the valve body (4). The valve seat (5) is an annular structure, and the inner wall is an arc-shaped structure. A valve flap (79) is also installed on the inner wall of the valve body (4) through a positioning mechanism. The positioning mechanism can be disassembled to facilitate the maintenance of the valve flap (79). The valve flap (79) is an arc-shaped spherical surface. One side of the valve flap (79) extends into the valve seat (5) and maintains a close fit with the inner wall of the valve seat (5). A valve handle mechanism for controlling the rotation and adjustment of the valve disc (79) is provided on the top of the valve body (4), and the bottom of the valve plate mechanism extends into the valve body (4) and is clamped with the positioning mechanism; A docking mechanism for connecting to an external pipeline is also installed on the bottom plate (1). The two valve bodies (4) can be docked with the two docking mechanisms respectively through lateral movement adjustment, so that when one ball valve is being repaired, the other ball valve can be connected to the docking mechanism.

2. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 1, characterized in that: The positioning mechanism comprises: A positioning tube (6) is fixedly mounted on the bottom inner wall of the valve body (4); The top and bottom ends of the mounting tube (7) are fixedly mounted with a limiting tube (71). The ends of the two limiting tubes (71) that are away from each other are fixedly mounted with a connecting arm (78). One side of the connecting arm (78) is fixedly connected to the valve flap (79). The connecting arm (78) located below is mounted on the positioning tube (6). The two limiting tubes (71) are slidably connected with a latch (75) and a clamping column (76). The latch (75) is inserted into the positioning tube (6) and rotates with the positioning tube (6). The clamping column (76) is fixedly mounted on the positioning tube (6). The top of the column (76) is a rectangular structure, which can be connected to the valve handle mechanism and rotated after receiving the driving force of the valve handle mechanism. The clamping column (76) is clamped and matched with the valve handle mechanism. Two movable holes (72) are symmetrically opened on the inner walls of both sides of the mounting tube (7). The mounting tube (7) is installed with an elastic support component, and the elastic support mechanism passes through the four movable holes (72) respectively. The ends of the clamping column (76) and the pin (75) that are close to each other are connected to the supporting elastic component.

3. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 2, characterized in that: The elastic support assembly comprises: Two push rings (74) are both sleeved on the mounting tube (7), and a limit plate (73) is fixedly installed in the push ring (74) and passes through the corresponding two movable holes (72). The ends of the latch (75) and the clamping column (76) close to each other are fixedly connected to the two limit plates (73). The mounting ring (710) is fixedly mounted on the center of the mounting tube (7). First compression springs (77) are welded on both sides of the mounting ring (710), and one end of the first compression spring (77) is welded to one side of the corresponding push ring (74).

4. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 3, characterized in that: The valve handle mechanism comprises: The valve stem (8) passes through the top inner wall of the valve body (4) and is rotatably sealed with the top inner wall of the valve body (4) via a sealing ring. A connecting column (81) is fixedly mounted on the bottom end of the valve stem (8). A rectangular slot (82) is provided at the bottom end of the connecting column (81) to match the rectangular structure at the top end of the clamping column (76). The top end of the clamping column (76) is inserted into the rectangular slot (82) and is clamped to the inner wall of the rectangular slot (82). A valve handle (83) located above the valve body (4) is fixedly mounted on the valve stem (8) by means of bolts. By twisting the valve handle (83), the valve stem (8) is driven to rotate, thereby driving the mounting tube (7) to rotate, thereby driving the valve disc (79) to rotate, thereby opening or closing the ball valve.

5. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 4, characterized in that: The valve handle (83) is provided with a sliding hole, and a pull plate (84) is slidably connected therein. A clamping plate (85) is fixedly installed on the bottom of one side of the pull plate (84) by welding. The side of the clamping plate (85) away from the pull plate (84) is a curved arc structure. A clamping ring (86) is also fixedly installed on the top of the valve body (4) by welding. The axis of the valve stem (8) coincides with the axis of the clamping ring (86). Two slots with an angle of 180° are symmetrically provided on the outer side of the clamping ring (86). The clamping plate (85) can be movably clamped with the two slots by moving in an arc shape of 180° around the valve stem (8) as the center, so as to realize the positioning of the valve handle (83).

6. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 5, characterized in that: A limiting rod (87) is fixedly installed on the inner wall of the sliding hole, and the limiting rod (87) passes through the pull plate (84) and is slidably connected to the pull plate (84). A second compression spring (88) located on one side of the pull plate (84) is sleeved on the limiting rod (87), and two ends of the second compression spring (88) are fixedly connected to the inner wall of one side of the sliding hole and the top of one side of the pull plate (84) respectively.

7. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 1, characterized in that: The docking mechanism comprises: A mounting frame (9) is mounted on the bottom plate (1), and support holes are provided on the inner walls of both sides of the mounting frame (9); Two butt joints (91) respectively penetrate the corresponding support holes and are slidably connected to the inner walls of the support holes. The two butt joints (91) can be moved. When the valve body (4) is moved between the two butt joints (91), the two butt joints (91) that are close to each other are closely connected to the two sides of the valve body (4). The butt joints (91) are used to be connected to an external delivery pipeline for liquid hydrogen. The two transmission assemblies respectively penetrate the inner walls on both sides of the mounting frame (9) and are respectively connected to the inner walls on both sides of the mounting frame (9). The transmission assemblies are connected to the corresponding docking pipes (91) to drive the docking pipes (91) to move and to position the docking pipes (91).

8. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 7, characterized in that: The transmission assembly comprises a gear ring (103) rotatably connected to one side of the mounting frame (9); a plurality of threaded tubes (101) are symmetrically passed through and rotatably connected on the inner wall of one side of the mounting frame (9); a transmission screw (10) is threadedly passed through the threaded tube (101); one end of the transmission screw (10) is welded to the corresponding butt joint (91); a gear (102) is fixedly sleeved on the threaded tube (101) by a key connection; and the plurality of gears (102) are meshed with the gear ring (103); A mounting arm (105) is provided at the bottom of the gear ring (103), and a plug rod (106) is slidably connected to the mounting arm (105). Positioning grooves are provided at the bottom of both sides of the mounting frame (9), and one end of the plug rod (106) is inserted into the positioning groove so that the plug rod (106) and the positioning groove are plugged and fixed to achieve braking of the gear ring (103); A plurality of blocking wheels (104) are symmetrically connected to both sides of the mounting frame (9), and the plurality of blocking wheels (104) on the same side are used to support and limit the gear ring (103); A tension spring (107) is sleeved on the insertion rod (106), and two ends of the tension spring (107) are respectively welded to one side of the installation arm (105) and the other end of the insertion rod (106).

9. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 8, characterized in that: A support ring (93) is welded inside the butt joint pipe (91), a pressing assembly is connected to the support ring (93), a butt joint ring (95) is installed on one side of the pressing assembly, and sealing rings (41) are welded at both side openings in the valve body (4), and one side of the butt joint ring (95) extends into the sealing ring (41) and is tightly fitted with the inner wall of the sealing ring (41).

10. The liquid hydrogen triple-eccentric replaceable ball valve according to claim 9, characterized in that: The pressing assembly includes a plurality of support rods (94) and a movable ring (92), wherein the plurality of support rods (94) all pass through the support ring (93) and are slidably connected to the support ring (93), the plurality of support rods (94) are arranged at equal intervals, one end of the plurality of support rods (94) is welded to one side of the movable ring (92), and the movable ring (92) is slidably connected to the inner wall of the butt tube (91); A third compression spring (96) is sleeved on the support rod (94), and two ends of the third compression spring (96) are fixedly connected to one side of the moving ring (92) and one side of the support ring (93) respectively.

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