Vacuum insulated low-temperature filling connection device

Abstract

The present invention discloses a vacuum insulated low-temperature filling connection device, comprising: a first connector, having a first flow channel and a first thermal insulation interlayer at least partially covering the first flow channel; a second connector, having a second flow channel and a second thermal insulation interlayer at least partially covering the second flow channel; the first connector is detachably docked with the second connector; a control mechanism is arranged on the second connector; the control mechanism is used to connect the first flow channel and the second flow channel to form a medium channel when the first connector is docked with the second connector, and to control the amount of medium passing through; the control mechanism is provided with a third thermal insulation interlayer to prevent heat leakage during operation.

Description

Technical Field

[0001] The invention relates to the field of low-temperature filling, in particular to a vacuum insulation type low-temperature filling connection device. Background Art

[0002] Because cryogenic liquids typically have low boiling points, low latent heat of vaporization, and easy evaporation, high thermal insulation performance is required for pipe connection devices during cryogenic liquid filling. If the thermal insulation performance of the pipe connection device is poor, it will cause large amounts of cryogenic liquid to vaporize, resulting in unnecessary economic losses. This large amount of cryogenic liquid vaporization will also cause a sudden increase in internal pressure in the pipeline, affecting the stability and service life of the pipeline seal. For some flammable and explosive cryogenic liquids, such as liquid hydrogen, the sudden vaporization can also pose a safety hazard.

[0003] The pipe connection device in the prior art achieves thermal insulation by setting up a thermal insulation interlayer. There are mainly two types: one is directly connected after connection, which has good thermal insulation performance but cannot adjust the flow in the pipe; the other is equipped with a control mechanism. After the device is connected, the flow channel can be opened or closed by the control mechanism, and the flow rate can be adjusted. However, the thermal insulation effect of the control mechanism is poor, and the cryogenic liquid can easily leak heat through the control mechanism, resulting in a large amount of vaporization of the cryogenic liquid.

[0004] Therefore, how to improve the technical defects in the existing technology has always been a problem that ordinary technicians in this field need to solve urgently. Summary of the Invention

[0005] The purpose of the present invention is to provide a vacuum-insulated low-temperature filling connection device, whose control mechanism achieves reliable sealing through inner and outer nested bellows, does not affect the interlayer vacuum insulation, has excellent thermal insulation performance, can prevent large-scale vaporization of low-temperature liquid to the greatest extent, and has the function of regulating pipeline flow.

[0006] In order to achieve the above-mentioned object, the vacuum insulation low-temperature filling connection device provided by the present invention comprises:

[0007] A first connector having a first flow channel and a first thermal insulation interlayer at least partially covering the first flow channel;

[0008] a second connector having a second flow channel and a second thermal insulation interlayer at least partially covering the second flow channel;

[0009] The first connector is detachably connected to the second connector;

[0010] a control mechanism, disposed on the second connector;

[0011] The control mechanism is used to connect the first flow channel and the second flow channel to form a medium channel when the first connector is connected to the second connector, and to control the flow rate of the medium;

[0012] The control mechanism is provided with a third heat-insulating interlayer.

[0013] In some embodiments, the first thermal insulation interlayer, the second thermal insulation interlayer, and the third thermal insulation interlayer are vacuum interlayers.

[0014] In some embodiments, the first connector has a first sealing interlayer disposed between the first thermal insulation interlayer and the first flow channel, and the second connector has a second sealing interlayer disposed between the second thermal insulation interlayer and the second flow channel;

[0015] When the first connector is docked with the second connector, the first sealing interlayer and the second sealing interlayer are connected to form a fourth thermal insulation interlayer, and the fourth thermal insulation interlayer is a low-temperature and low-vacuum interlayer.

[0016] In some embodiments, the control mechanism includes a control assembly, a first transmission assembly, and a second transmission assembly;

[0017] The control assembly is connected to the first transmission assembly, and the second transmission assembly is connected to the first transmission assembly;

[0018] When the first connector and the second connector are docked, the first transmission assembly is moved by the control assembly, thereby driving the movement of the second transmission assembly to open or close the medium channel.

[0019] In some embodiments, the side wall of the second connector has a first radial protrusion structure, one end of the first radial protrusion structure is open to form a receiving space, the control component is installed at the opening of the first radial protrusion structure, the first transmission component is installed in the receiving space, the receiving space is connected to the second flow channel, and the second transmission component is installed in the second flow channel.

[0020] In some embodiments, the control assembly includes a pressure bolt kit, an outer end cap, an inner end cap, and a first spring;

[0021] The interior of the accommodating space is provided with a radially extending transverse flange near the opening;

[0022] The outer end cover is fitted over the opening of the first radial protrusion structure, and a first through hole is provided in the middle of the outer end cover;

[0023] The inner end cover is movably mounted in the accommodation space and reciprocates between the outer end cover and the transverse flange;

[0024] The pressure bolt kit is detachably abutted against a side of the inner end cover facing the outer end cover through the first through hole;

[0025] One end of the first spring abuts against a side of the inner end cover facing the transverse flange, and the other end abuts against the transverse flange;

[0026] The inner end cover is moved from the outer end cover to the transverse flange by applying pressure to the inner end cover by the pressure bolt kit. When the pressure bolt kit is separated from the inner end cover, the first spring restores the inner end cover to its original state.

[0027] In some embodiments, the first transmission assembly includes a screw and a screw sleeve;

[0028] The top end of the screw is connected to the inner end cover and moves synchronously with the inner end cover in the same direction;

[0029] The screw sleeve is rotatably sleeved on the lower end of the screw rod and is connected to the second transmission assembly. When the screw rod moves, the screw sleeve rotates synchronously.

[0030] In some embodiments, the second transmission assembly includes a pivot shaft, a swing arm, and an active valve core;

[0031] The active valve core has a first valve stem, and the active valve core is detachably mounted on one end of the second connector that is connected to the first connector. The pivot is connected to the screw sleeve and rotates synchronously with the screw sleeve. The pivot has a second radial protrusion structure. One end of the swing arm is fixed to the second radial protrusion structure, and the other end is fixed to the first valve stem.

[0032] The rotation of the screw sleeve drives the pivot to rotate, and the pivot drives the first valve stem to move axially along the second flow channel through the swing arm, thereby realizing the opening or closing of the active valve core.

[0033] In some embodiments, it further includes a flow regulating mechanism installed on the first connector;

[0034] The flow regulating mechanism includes a passive valve core, a positioning member and a second spring;

[0035] One end of the passive valve core has a second valve stem, and the passive valve core is detachably mounted on the end where the first connector and the second connector are connected. The positioning member is mounted on the end of the first connector connected to the pipeline. A second through hole is provided in the middle of the positioning member for the second valve stem to pass through and enable the passive valve core to move axially along the second through hole. The second spring is sleeved on the second valve stem, and one end abuts against the positioning member, and the other end abuts against the passive valve core.

[0036] When the first connector is docked with the second connector, the passive valve core abuts against the active valve core, and the control component drives the first transmission component so that the active valve core pushes the passive valve core into the first flow channel.

[0037] In some embodiments, the inner surface of the first flow channel is composed of a plurality of conical surfaces and cylindrical surfaces;

[0038] Flow regulation is achieved by controlling the position of the passive valve core in the first flow channel.

[0039] In some embodiments, the third heat-insulating interlayer is located between the first radially protruding structure and the accommodating space;

[0040] The third heat-insulating interlayer is coated on the first transmission component.

[0041] In some embodiments, the invention further comprises an inner bellows and an outer bellows, wherein the inner bellows is coated on a portion of the screw and connected to the screw at its upper end, the outer bellows is concentrically nested on the outer side of the inner bellows and connected to the inner end cap at its upper end, and the interlayer between the inner bellows and the outer bellows is in electrical communication with the third thermal insulation interlayer;

[0042] The third thermal insulation interlayer is electrically connected to the second thermal insulation interlayer.

[0043] In some embodiments, the device further comprises a rotating assembly rotatably mounted on one end of the first connector mating with the second connector or one end of the second connector mating with the first connector;

[0044] When the rotating assembly is mounted on the first connector, a positioning guide groove and a limiting ring groove are provided on one end of the second connector that is connected to the first connector, and a limiting section is provided on the side of the limiting ring groove;

[0045] When the rotating assembly is installed on the second connector, a positioning guide groove and a limiting ring groove are provided on one end of the first connector that is connected to the second connector, and a limiting section is provided on the side of the limiting ring groove;

[0046] The rotating assembly cooperates with the positioning guide groove and the limiting ring groove to connect the first connector and the second connector.

[0047] In some embodiments, the rotation assembly includes a roller assembly and a hand wheel;

[0048] When the first connector is docked with the second connector, the roller assembly enters the limiting ring groove through the positioning guide groove, and the hand wheel is rotated forward to make the roller assembly roll along the limiting ring groove into the limiting section, and the first connector and the second connector are docked.

[0049] The present invention has at least one of the following beneficial effects:

[0050] 1. The vacuum-insulated cryogenic refueling connection device provided by the present invention utilizes a first insulating interlayer in the first connector and a second insulating interlayer in the second connector. This vacuum-insulated interlayer provides excellent thermal insulation performance, meeting the thermal insulation requirements for cryogenic refueling. The simultaneous provision of a control mechanism and a third insulating interlayer ensures that the vacuum-insulated cryogenic refueling connection device, while providing flow control and regulation functions, also offers excellent thermal insulation. This minimizes heat leakage through the control mechanism, leading to substantial vaporization of the cryogenic liquid within the pipeline, thereby preventing economic losses and accidents.

[0051] 2. The vacuum-insulated low-temperature filling connection device provided by the present invention is provided with a flow regulating mechanism, and the flow rate in the pipe is adjusted by driving the flow regulating mechanism through the control mechanism.

[0052] 3. The vacuum-insulated low-temperature filling connection device provided by the present invention realizes the rapid docking of the first connector and the second connector by means of positioning guide grooves, limit ring grooves and rotating components respectively provided on the first connector and the second connector, thereby greatly improving the convenience of docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0054] Figure 1 This is a schematic diagram of the three-dimensional structure of the vacuum insulation type low-temperature filling connection device provided by the present invention when the first connector and the second connector are not connected;

[0055] Figure 2 yes Figure 1 A schematic diagram of the front structure of FIG.

[0056] Figure 3 1 is a side structural diagram of the first connector in the vacuum insulation low-temperature filling connection device provided by the present invention;

[0057] Figure 4 yes Figure 3 Cross-section at AA;

[0058] Figure 5 1 is a front view structural diagram of the first connector in the vacuum insulation type low-temperature filling connection device provided by the present invention;

[0059] Figure 6 1 is a side structural diagram of the second connector in the vacuum insulation low-temperature filling connection device provided by the present invention;

[0060] Figure 7 yes Figure 6 Cross-section at the middle BB;

[0061] Figure 8 It is a schematic cross-sectional structural diagram of a first connector and a second connector in a vacuum insulation type low-temperature filling connection device provided by the present invention when they are docked in one state;

[0062] Figure 9 This is a structural schematic diagram of the first connector and the second connector in the vacuum insulation low-temperature filling connection device provided by the present invention being docked in another state;

[0063] Figure 10 1 is a schematic top view of the structure of the second transmission assembly in one state in the vacuum insulation type low-temperature filling connection device provided by the present invention;

[0064] Figure 11 It is a schematic top view of the structure of the second transmission assembly in another state in the vacuum insulation low-temperature filling connection device provided by the present invention.

[0065] Description of Figure Numbers:

[0066] First connector 1, limiting ring groove 11, limiting section 111, positioning guide groove 12, flow regulating mechanism 13, first flow channel 130, cylindrical surface 1301, conical surface 1302, positioning member 131, first positioning retaining ring 1311, positioning ring 1312, first friction-reducing bushing 1313, locking nut 1314, passive valve core 132, second valve stem 133, second spring 134, first thermal insulation interlayer 14, first sealing interlayer 15, sealing member 16, low-temperature sealing cover plate 1 61, low-temperature seal 162, low-temperature end face seal 1621, low-temperature radial seal 1622, normal-temperature seal 163, second connector 2, rotating assembly 20, handwheel 201, force rod 2011, roller assembly 202, threaded protective cap 2021, roller core shaft 2022, roller 2023, ball 203, axial limiter 204, second thermal insulation interlayer 21, second sealing interlayer 22, control mechanism 23, control assembly 231, pressure bolt kit 23 11, outer end cover 2312, inner end cover 2313, first spring 2314, transverse flange 2315, screw heat insulation connecting bolt 2316, axial sliding pin 2317, first transmission assembly 232, screw 2321, screw sleeve 2322, screw sleeve seal 2323, second transmission assembly 233, pivot 2331, second radial protrusion structure 2332, swing arm 2333, active valve core 2334, first valve stem 2335, polytetrafluoroethylene bushing 2336, connecting pin 23 37, second positioning retaining ring 2338, second friction reducing bushing 2339, first radial protrusion structure 24, third thermal insulation interlayer 25, outer bellows 251, inner bellows 252, second flow channel 26, equipment pipeline 3, equipment outer pipe 31, equipment inner pipe 32, equipment thermal insulation interlayer 33, equipment flow channel 34, first evacuation piece 35, filling pipeline 4, filling outer pipe 41, filling inner pipe 42, filling thermal insulation interlayer 43, filling flow channel 44, second evacuation piece 45, fourth thermal insulation interlayer 5. DETAILED DESCRIPTION

[0067] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0068] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0069] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0070] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0071] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0072] In one embodiment, the reference Figures 1 to 9 The vacuum insulated low-temperature filling connection device provided by the present invention includes a first connector 1, having a first flow channel 130 and a first thermal insulation interlayer 14 at least partially covering the first flow channel 130; a second connector 2, having a second flow channel 26 and a second thermal insulation interlayer 21 at least partially covering the second flow channel 26; the first connector 1 is detachably docked with the second connector 2; a control mechanism 23 is arranged on the second connector 2; the control mechanism 23 is used to connect the first flow channel 130 and the second flow channel 26 to form a medium channel when the first connector 1 is docked with the second connector 2, and to control the amount of medium passing through; the control mechanism 23 is also provided with a third thermal insulation interlayer 25.

[0073] It should be further pointed out that the vacuum insulated low-temperature filling connection device provided by the present invention is used in the field of low-temperature filling. The vacuum insulated low-temperature filling connection device provided in this embodiment is preferably used for filling liquid hydrogen, wherein the first connector 1 and the second connector 2 can be connected to the equipment pipeline 3 and the filling pipeline 4 respectively. When the first connector 1 is connected to the equipment pipeline 3, the second connector 2 is connected to the filling pipeline 4; when the first connector 1 is connected to the filling pipeline 4, the second connector 2 is connected to the equipment pipeline 3. Figure 1 、 Figure 2 、 Figure 4 and Figure 5 In this embodiment, preferably, the first connector 1 is connected to the equipment pipeline 3, and the second connector 2 is connected to the filling pipeline 4.

[0074] It should be further explained that the interior of the first thermal insulation interlayer 14 and the second thermal insulation interlayer 21 can be kept warm by vacuum insulation and low-pressure carbon dioxide insulation. In this embodiment, the interior of the first thermal insulation interlayer 14 and the second thermal insulation interlayer 21 is preferably vacuum.

[0075] Reference Attachment Figure 4 In this embodiment, the equipment pipe 3 connected to the first connector 1 includes an outer equipment pipe 31 and an inner equipment pipe 32. An equipment thermal insulation interlayer 33 is formed between the outer equipment pipe 31 and the inner equipment pipe 32. The equipment thermal insulation interlayer 33 communicates with the first thermal insulation interlayer 14. The interior of the equipment inner pipe 32 defines an equipment flow channel 34, which communicates with the first flow channel 130. Furthermore, the outer equipment pipe 31 is provided with a first evacuation member 35 for evacuating the equipment thermal insulation interlayer 33 and the first thermal insulation interlayer 14.

[0076] Reference Attachment Figure 7 In this embodiment, the filling pipe 4 connected to the second connector 2 includes an outer filling pipe 41 and an inner filling pipe 42. An insulating filling layer 43 is formed between the outer and inner filling pipes 41 and 42. The inner filling pipe 42 contains a filling channel 44, which communicates with the second channel 26. The insulating filling layer 43 communicates with the second insulating layer 21. Furthermore, the outer filling pipe 41 is provided with a second evacuation member 45 for evacuating the interiors of the insulating filling layer 43 and the second insulating layer 21.

[0077] refer to Figure 4 and Figure 7 Furthermore, in this embodiment, the first connector 1 is further provided with a first sealing interlayer 15, and the second connector 2 is provided with a second sealing interlayer 22. The first sealing interlayer 15 is located between the first flow channel 130 and the first thermal insulation interlayer 14; the second sealing interlayer 22 is located between the second flow channel 26 and the second thermal insulation interlayer 21. When the first connector 1 and the second connector 2 are docked, Figure 8 and Figure 9 The first sealing interlayer 15 and the second sealing interlayer 22 form a fourth thermal insulation interlayer 5. The liquid hydrogen in the medium channel reduces the temperature of the gaseous medium inside the fourth thermal insulation interlayer 5 or liquefies it through heat conduction, achieving low temperature and low vacuum, reducing heat convection between the connection between the first connector 1 and the second connector 2 and the environment, and further preventing heat leakage.

[0078] It should be further pointed out that the fourth thermal insulation interlayer 5 may also be filled with thermal insulation materials, and the type of thermal insulation materials is not limited. The specific type of thermal insulation materials should not constitute a limitation to the present invention.

[0079] refer to Figure 6 and Figure 7In one embodiment, the control mechanism 23 includes a control component 231 , a first transmission component 232 and a second transmission component 233 ; the control component 231 is connected to the first transmission component 232 , and the second transmission component 233 is connected to the first transmission component 232 .

[0080] When the first connector 1 is docked with the second connector 2 , the control component 231 causes the first transmission component 232 to move, thereby driving the movement of the second transmission component 233 to open or close the medium channel.

[0081] Furthermore, the side wall of the second connector 2 has a first radial protrusion structure 24, one end of the first radial protrusion structure 24 is open to form an accommodating space, the control component 231 is installed at the opening of the first radial protrusion structure 24, the first transmission component 232 is installed in the accommodating space, the accommodating space is connected to the second flow channel 26, and the second transmission component 233 is installed in the second flow channel 26.

[0082] refer to Figure 7 In this embodiment, the control assembly 231 includes a pressure bolt kit 2311, an outer end cover 2312, an inner end cover 2313 and a first spring 2314. Furthermore, a radially extending transverse flange 2315 is provided inside the accommodating space near the opening.

[0083] The outer end cover 2312 covers the opening of the first radial protrusion structure 24, and a first through hole is provided in the middle of the outer end cover 2312. The inner end cover 2313 can be movably installed in the accommodating space and reciprocates between the outer end cover 2312 and the transverse flange 2315. The pressure bolt kit 2311 is detachably abutted against the side of the inner end cover 2313 facing the outer end cover 2312 through the first through hole. One end of the first spring 2314 abuts against the side of the inner end cover 2313 facing the transverse flange 2315, and the other end abuts against the transverse flange 2315.

[0084] The pressure bolt kit 2311 applies pressure to the inner end cover 2313 so that the inner end cover 2313 moves from the outer end cover 2312 to the transverse flange 2315. When the pressure bolt kit 2311 is separated from the inner end cover 2313, the first spring 2314 restores the inner end cover 2314 to its original state. Accordingly, under the action of the first spring 2314, the first transmission assembly 232 and the second transmission assembly 233 also restore to their original states.

[0085] Preferably, the control assembly 231 also includes an axial sliding pin 2317, which is fixed to the outer end cover 2312 and detachably connected to the inner end cover 2313. Its function is to limit the movement of the inner end cover 2313 so that the inner end cover 2313 can only reciprocate along the direction from the outer end cover 2312 to the transverse flange 2315, and cannot rotate relative to the outer end cover 2312.

[0086] In this embodiment, the first transmission assembly 232 includes a screw rod 2321 and a screw sleeve 2322 .

[0087] The top end of the screw rod 2321 is connected to the inner end cover 2313. There is no relative rotation between the screw rod 2321 and the inner end cover 2313, and the screw rod 2321 moves synchronously with the inner end cover 2313 in the same direction. The screw sleeve 2322 is rotatably sleeved on the lower end of the screw rod 2321 and is connected to the second transmission assembly 233. When the screw rod 2321 moves, the screw sleeve 2322 rotates synchronously.

[0088] Furthermore, a sleeve seal 2323 is provided on the circumference of the sleeve 2322 to prevent leakage of low-temperature lubricant between the screw 2321 and the sleeve 2322, and to prevent liquid hydrogen from leaking to the top of the sleeve 2322, thereby effectively reducing heat leakage.

[0089] refer to Figure 7 、 Figure 10 and Figure 11 In this embodiment, the second transmission assembly includes a pivot 2331, a swing arm 2333, and an active valve core 2334. The active valve core 2334 has a first valve stem 2335. The active valve core 2334 is detachably mounted on one end of the second connector 2 that interfaces with the first connector 1. The pivot 2331 is connected to the screw sleeve 2322 and rotates synchronously with the screw sleeve 2322. The pivot 2331 has a second radial protrusion structure 2332. One end of the swing arm 2333 is fixed to the second radial protrusion structure 2332, and the other end is fixed to the first valve stem 2335.

[0090] The rotation of the screw sleeve 2322 drives the pivot 2331 to rotate, and the pivot 2331 drives the first valve stem 2335 to move axially along the second flow channel 26 through the swing arm 2333, thereby realizing the opening or closing of the active valve core 2334.

[0091] Furthermore, in the vacuum insulated low-temperature filling connection device provided in this embodiment, a thread is provided at the lower end of the sleeve 2322, the pivot 2331 is connected and fixed to the sleeve 2322 through the thread, the swing arm 2333 is rotatably fixed to the second radial protrusion structure 2332 through the connecting pin 2337, and the other end is rotatably fixed to the first valve stem 2335 through the connecting pin 2337.

[0092] In a preferred embodiment, a polytetrafluoroethylene bushing 2336 is further provided at the bottom of the pivot 2331. The anti-friction properties of the polytetrafluoroethylene bushing 2336 are utilized to provide bearing support and reduce the rotational friction resistance of the pivot 2331. Furthermore, the polytetrafluoroethylene bushing 2336 has low thermal conductivity, which can effectively reduce heat leakage from the pivot 2331.

[0093] Preferably, reference Figure 7A second positioning retaining ring 2338 is further disposed within the second flow channel 26. The second positioning retaining ring 2338 has a through hole through which the first valve stem 2335 passes. The active valve core 2334 and the pivot 2331 are respectively located on either side of the second positioning retaining ring 2338. The second positioning retaining ring 2338 is used to restrict the first valve stem 2335 from moving axially along the second flow channel 26.

[0094] refer to Figure 7 A second friction-reducing bushing 2339 is provided between the first valve stem 2335 and the second positioning retaining ring 2338 to reduce the friction between the first valve stem 2335 and the second positioning retaining ring 2338.

[0095] In one embodiment, reference Figure 7 The control mechanism 23 in the vacuum-insulated cryogenic refueling connection device provided by the present invention is further provided with a third thermal insulation interlayer 25, which covers the first transmission assembly 232 and is located between the first radially protruding structure 24 and the accommodating space. Furthermore, this embodiment also includes an inner bellows 252 and an outer bellows 251. The inner bellows 252 covers a portion of the screw 2321 and is connected to the screw 2321 at its upper end. The outer bellows 251 is concentrically nested on the outside of the inner bellows 252 and connected to the inner end cap 2313 at its upper end. The interlayer between the inner bellows 252 and the outer bellows 251 is electrically conductive to the third thermal insulation interlayer 25.

[0096] Preferably, the inner bellows 252 and the upper end of the screw 2321 are connected by welding and sealing, and the outer bellows 251 and the inner end cover 2313 are connected by welding and sealing.

[0097] Furthermore, the third thermal insulation interlayer 25 is electrically connected to the second thermal insulation interlayer 21 .

[0098] Preferably, the inner end cap 2313 and the screw 2321 are secured by screw adiabatic coupling bolts 2316. In this embodiment, the screw adiabatic coupling bolts 2316 are made of fiberglass reinforced plastic, which has a low thermal conductivity and can effectively reduce heat leakage from the screw 2321. It should be further noted that the material of the screw adiabatic coupling bolts 2316 is not limited, as long as it can meet the functions described in the above embodiment. The material of the screw adiabatic coupling bolts 2316 should not constitute a limitation on the present invention.

[0099] In one embodiment, reference Figure 4 、 Figure 8 and Figure 9 The vacuum insulation low-temperature filling connection device provided by the present invention also includes a flow regulating mechanism 13 installed on the first connector 1.

[0100] The flow regulating mechanism 13 includes a passive valve core 132 , a positioning member 131 and a second spring 134 .

[0101] One end of the passive valve core 132 has a second valve stem 133, and the passive valve core 132 can be detachably installed at the end where the first connector 1 and the second connector 2 are connected. The positioning member 131 is installed at the end where the first connector 2 is connected to the equipment pipeline 3. A second through hole is provided in the middle of the positioning member 131 for the second valve stem 133 to pass through and enable the passive valve core 132 to move axially along the second through hole. The second spring 134 is sleeved on the second valve stem 133, and one end abuts against the positioning member 131 and the other end abuts against the passive valve core 132.

[0102] refer to Figure 8 and Figure 9 When the first connector 1 and the second connector 2 are mated, the passive valve core abuts the active valve core. The control assembly drives the first transmission assembly 232, causing the active valve core 2334 to push the passive valve core 132 into the first flow channel 130. When the first connector 1 and the second connector 2 are separated, the second spring 134 resets the passive valve core 132 to close the first flow channel 130, and the first spring 2314 resets the active valve core 2334 to close the second flow channel 26.

[0103] Furthermore, the positioning member 131 includes a first positioning retaining ring 1311 and a positioning ring 1312, which are used to limit the movement direction of the passive valve core 132, so that it moves axially along the first flow channel 130, and prevent the passive valve core 132 from detaching from the first connector. At the same time, a first friction-reducing bushing 1313 is provided between the second valve stem 133 and the positioning ring 1312 to reduce friction. The first friction-reducing bushing 1313 is fixed by a locking nut 1314.

[0104] Furthermore, the inner surface of the first flow channel 130 is composed of several conical surfaces 1302 and cylindrical surfaces 1301. Since the diameter of the conical surface 1302 changes along the axial direction and the diameter of the first flow channel 130 is the largest when reaching the cylindrical surface 1301, flow regulation can be achieved by controlling the position of the passive valve core 132 in the first flow channel 130.

[0105] It should be further pointed out that seals 16 are respectively provided at the butt ends of the first connector 1 and the second connector 2 to prevent heat leakage and leakage of liquid hydrogen. Specifically, the seal 16 includes a low-temperature sealing cover plate 161, a low-temperature seal 162, and a normal-temperature seal 163. The low-temperature sealing cover plate 161 is connected to the passive valve core 132 by bolts, the low-temperature seal 162 is used to seal the medium channel, and the normal-temperature seal 163 is used to seal the fourth thermal insulation interlayer. It should be pointed out that the low-temperature seal 162 of the active valve core on the second connector 2 also includes a low-temperature end face seal 1621 and a low-temperature radial seal 1622 to enhance the anti-leakage effect.

[0106] In one embodiment, reference Figure 4 and Figure 7 The vacuum insulated low-temperature filling connection device provided by the present invention also includes a rotating component 20, which is rotatably installed on one end of the first connector 1 and the second connector 2 that are connected to each other, or on one end of the second connector 2 and the first connector 1 that are connected to each other.

[0107] Preferably, the rotating assembly 20 is connected to the first connector 1 or the second connector 2 via the ball bearing 203. It should be noted that the connection method of the rotating assembly 20 and the first connector 1 or the second connector 2 is not limited, as long as it can achieve the above-mentioned rotation function.

[0108] refer to Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 When the rotating assembly 20 is installed on the first connector 1, a positioning guide groove 12 and a limiting ring groove 11 are provided at the end of the second connector 2 that is connected to the first connector 1, and a limiting section 111 is provided on the side of the limiting ring groove 11; when the rotating assembly 20 is installed on the second connector 2, a positioning guide groove 12 and a limiting ring groove 11 are provided at the end of the first connector 1 that is connected to the second connector 2, and a limiting section 111 is provided on the side of the limiting ring groove.

[0109] The rotating assembly 20 cooperates with the positioning guide groove 12 and the limiting ring groove 11 to connect the first connector 1 and the second connector 2. Through the cooperation of the rotating assembly 20 with the positioning guide groove 12 and the limiting ring groove 11, the first connector 1 and the second connector 2 can be quickly connected and disconnected, greatly improving convenience.

[0110] In this embodiment, the rotating assembly 20 is preferably provided on the second connector 2 , and the positioning guide groove 12 and the limiting ring groove 11 are provided on the first connector 1 .

[0111] The rotating assembly 20 includes a roller assembly 202 and a hand wheel 201 .

[0112] Specifically, the roller assembly 202 includes a threaded protective cap 2021, a roller core shaft 2022 and a roller 2023. One end of the roller core shaft 2022 is connected to the roller 2023, and the other end is connected to the threaded protective cap 2021. When the first connector 1 and the second connector 2 are docked, the roller 2023 cooperates with the positioning guide groove 12 and the limiting ring groove 11.

[0113] Furthermore, it also includes a force rod 2011. The hand wheel 201 is provided with an inner hole. The force rod 2011 is installed in the inner hole to increase the rotational torque to achieve a labor-saving effect.

[0114] Preferably, the rotating assembly 20 further includes an axial limiter 204 for preventing the rotating assembly 20 from axially moving relative to the second connector 2 , thereby improving safety when the first connector 1 and the second connector 2 are docked.

[0115] When the first connector 1 is docked with the second connector 2, the roller assembly 202 enters the limiting ring groove 11 through the positioning guide groove 12, and the hand wheel 201 is rotated forward to make the roller assembly 202 roll along the limiting ring groove 11 into the limiting section 111, and the first connector 1 and the second connector 2 are docked.

[0116] Specifically, the limiting section 111 is formed by the gradual protrusion of the side of the limiting ring groove 11. When the roller 2023 just enters the limiting ring groove 11, there is a gap between the roller 2023 and the side of the limiting ring groove 11. In the process of rotating the handwheel 201 to make the roller 2023 roll along the limiting ring groove 11 and gradually enter the limiting section 111, the gap between the roller 2023 and the side of the limiting ring groove 11 gradually decreases. When the roller 2023 enters the limiting section 111, the roller 2023 and the limiting ring groove 11 are interference fit, so that the first connector 1 and the second connector 2 are stably docked.

[0117] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A vacuum insulation low temperature filling connection device, characterized in that: include: A first connector having a first flow channel and a first thermal insulation interlayer at least partially covering the first flow channel; The second connector has a second flow channel and a second thermal insulation interlayer at least partially covering the second flow channel; the side wall of the second connector has a first radial protrusion structure, and one end of the first radial protrusion structure is open to form a receiving space; The first connector is detachably connected to the second connector; A control mechanism is provided on the second connector; the control mechanism includes a control assembly, a first transmission assembly, and a second transmission assembly; when the first connector and the second connector are docked, the control assembly causes the first transmission assembly to move, thereby driving the movement of the second transmission assembly to open or close the medium channel; The control mechanism is used to connect the first flow channel and the second flow channel to form a medium channel when the first connector is connected to the second connector, and to control the flow rate of the medium; The control mechanism is provided with a third thermal insulation interlayer; the third thermal insulation interlayer is connected to the second thermal insulation interlayer; the third thermal insulation interlayer is located between the first radial protrusion structure and the accommodating space; the third thermal insulation interlayer is covered on the first transmission assembly; the control mechanism is reliably sealed by means of inner and outer nested bellows.

2. The vacuum insulation low-temperature filling connection device according to claim 1, characterized in that: The first thermal insulation interlayer, the second thermal insulation interlayer and the third thermal insulation interlayer are vacuum interlayers.

3. The vacuum insulation low-temperature filling connection device according to claim 1 or 2, characterized in that: The first connector has a first sealing interlayer disposed between the first thermal insulation interlayer and the first flow channel, and the second connector has a second sealing interlayer disposed between the second thermal insulation interlayer and the second flow channel; When the first connector is docked with the second connector, the first sealing interlayer and the second sealing interlayer are connected to form a fourth thermal insulation interlayer, and the fourth thermal insulation interlayer is a low-temperature and low-vacuum interlayer.

4. The vacuum insulation low-temperature filling connection device according to claim 1, characterized in that: The control component is connected to the first transmission component, and the second transmission component is connected to the first transmission component.

5. The vacuum insulation low-temperature filling connection device according to claim 4, characterized in that The control assembly is installed at the opening of the first radial protrusion structure, the first transmission assembly is installed in the accommodating space, the accommodating space is communicated with the second flow channel, and the second transmission assembly is installed in the second flow channel.

6. The vacuum insulation low-temperature filling connection device according to claim 5, characterized in that: The control assembly includes a pressure bolt kit, an outer end cover, an inner end cover and a first spring; The interior of the accommodating space is provided with a radially extending transverse flange near the opening; The outer end cover is fitted over the opening of the first radial protrusion structure, and a first through hole is provided in the middle of the outer end cover; The inner end cover is movably mounted in the accommodation space and reciprocates between the outer end cover and the transverse flange; The pressure bolt kit is detachably abutted against a side of the inner end cover facing the outer end cover through the first through hole; One end of the first spring abuts against a side of the inner end cover facing the transverse flange, and the other end abuts against the transverse flange; The inner end cover is moved from the outer end cover to the transverse flange by applying pressure to the inner end cover by the pressure bolt kit. When the pressure bolt kit is separated from the inner end cover, the first spring restores the inner end cover to its original state.

7. The vacuum insulation low-temperature filling connection device according to claim 6, characterized in that: The first transmission assembly includes a screw and a screw sleeve; The top end of the screw is connected to the inner end cover and moves synchronously with the inner end cover in the same direction; The screw sleeve is rotatably sleeved on the lower end of the screw rod and is connected to the second transmission assembly. When the screw rod moves, the screw sleeve rotates synchronously.

8. The vacuum insulation low-temperature filling connection device according to claim 7, characterized in that: The second transmission assembly includes a pivot shaft, a swing arm and an active valve core; The active valve core has a first valve stem, and the active valve core is detachably mounted on one end of the second connector that is connected to the first connector. The pivot is connected to the screw sleeve and rotates synchronously with the screw sleeve. The pivot has a second radial protrusion structure. One end of the swing arm is fixed to the second radial protrusion structure, and the other end is fixed to the first valve stem. The rotation of the screw sleeve drives the pivot to rotate, and the pivot drives the first valve stem to move axially along the second flow channel through the swing arm, thereby realizing the opening or closing of the active valve core.

9. The vacuum insulation low-temperature filling connection device according to claim 8, characterized in that: It also includes a flow regulating mechanism installed on the first connector; The flow regulating mechanism includes a passive valve core, a positioning member and a second spring; One end of the passive valve core has a second valve stem, and the passive valve core is detachably mounted on the end where the first connector and the second connector are connected. The positioning member is mounted on the end of the first connector connected to the pipeline. A second through hole is provided in the middle of the positioning member for the second valve stem to pass through and enable the passive valve core to move axially along the second through hole. The second spring is sleeved on the second valve stem, and one end abuts against the positioning member, and the other end abuts against the passive valve core. When the first connector is docked with the second connector, the passive valve core abuts against the active valve core, and the control component drives the first transmission component so that the active valve core pushes the passive valve core into the first flow channel.

10. The vacuum insulation low-temperature filling connection device according to claim 9, characterized in that: The inner surface of the first flow channel is composed of a plurality of conical surfaces and cylindrical surfaces; Flow regulation is achieved by controlling the position of the passive valve core in the first flow channel.

11. The vacuum insulated low-temperature filling connection device according to any one of claims 7 to 10, characterized in that: It also includes an inner bellows and an outer bellows, the inner bellows is covered on a part of the screw, and the upper end is connected to the screw, the outer bellows is concentrically nested on the outside of the inner bellows, and the upper end is connected to the inner end cover, and the interlayer between the inner bellows and the outer bellows is connected to the third thermal insulation interlayer.

12. The vacuum insulation low-temperature filling connection device according to claim 1, characterized in that: It also includes a rotating assembly rotatably mounted on one end of the first connector that is connected to the second connector or one end of the second connector that is connected to the first connector; When the rotating assembly is mounted on the first connector, a positioning guide groove and a limiting ring groove are provided on one end of the second connector that is connected to the first connector, and a limiting section is provided on the side of the limiting ring groove; When the rotating assembly is installed on the second connector, a positioning guide groove and a limiting ring groove are provided on one end of the first connector that is connected to the second connector, and a limiting section is provided on the side of the limiting ring groove; The rotating assembly cooperates with the positioning guide groove and the limiting ring groove to connect the first connector and the second connector.

13. The vacuum insulation low-temperature filling connection device according to claim 12, characterized in that: The rotating assembly includes a roller assembly and a hand wheel; When the first connector is docked with the second connector, the roller assembly enters the limiting ring groove through the positioning guide groove, and the hand wheel is rotated forward to make the roller assembly roll along the limiting ring groove into the limiting section, and the first connector and the second connector complete rapid docking; reverse rotation realizes rapid disconnection.

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