CN221121139U - High-pressure hydrogenation electromagnetic valve - Google Patents
High-pressure hydrogenation electromagnetic valve Download PDFInfo
- Publication number
- CN221121139U CN221121139U CN202323082953.0U CN202323082953U CN221121139U CN 221121139 U CN221121139 U CN 221121139U CN 202323082953 U CN202323082953 U CN 202323082953U CN 221121139 U CN221121139 U CN 221121139U
- Authority
- CN
- China
- Prior art keywords
- valve core
- auxiliary
- chamber
- main valve
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
The utility model discloses a high-pressure hydrogenation electromagnetic valve, which comprises a hollow valve rod, a valve body and an electromagnetic control part fixed on the valve body, wherein one end of the hollow valve rod is connected with the electromagnetic control part, the other end of the hollow valve rod is connected with the valve body, an auxiliary valve core cavity and a main valve core cavity are arranged in the hollow valve rod, an auxiliary valve core is arranged in the auxiliary valve core cavity, a main valve core is arranged in the main valve core cavity, a valve core pressure spring for driving the auxiliary valve core to move downwards is arranged between the auxiliary valve core and the electromagnetic control part, the auxiliary valve core cavity and the main valve core cavity are arranged in a penetrating way, an air inlet channel and an air outlet channel are arranged in the main valve core, the air inlet channel comprises an air inlet hole and an air inlet auxiliary hole which are communicated in sequence, the air outlet channel penetrates through the main valve core, the air outlet hole and the air outlet auxiliary hole are distributed along the axis of the main valve core, and the auxiliary valve core is provided with a sealing head assembly capable of sealing the air outlet hole of the main valve core. The utility model can be applied to vehicle systems as well as to high-pressure filling.
Description
Technical Field
The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a high-pressure hydrogenation electromagnetic valve.
Background
With the continuous development of the automobile industry, it is becoming urgent to solve the problems of energy shortage, environmental pollution and the like. Because of the advantages of high safety, low price, sufficient combustion, small environmental pollution and the like, vehicles using hydrogen, compressed natural gas and other gases as fuel have been rapidly developed in recent years.
The solenoid valve is needed to control the on-off of a vehicle pipeline in a hydrogenation system, the vehicle system requires smaller solenoid valve volume and power, hydrogenation pressure is larger, such as 15W for solenoid valve power, but the existing solenoid valve volume and power are larger, such as power reaching 20-30W, and the solenoid valve is not suitable for vehicle system and high-pressure filling, and particularly as shown in FIG. 1, the solenoid valve in the prior art comprises an existing valve rod 61, an existing screw sleeve 62 and an existing valve body 63, a subsidiary valve core is positioned in the existing valve rod 61, and a main valve core is positioned in the existing screw sleeve 62, so that the whole volume of the solenoid valve is larger.
Disclosure of utility model
In order to solve the problems, the utility model provides a high-pressure hydrogenation electromagnetic valve which can be applied to a vehicle-mounted system and also can be applied to high-pressure filling.
The embodiment of the utility model is realized by the following technical scheme:
The utility model provides a high-pressure hydrogenation solenoid valve, including hollow valve rod, the valve body and be fixed in the electromagnetic control portion of this valve body, this hollow valve rod one end is connected with electromagnetic control portion, this hollow valve rod other end is connected with the valve body, be equipped with auxiliary valve core chamber and main valve core chamber in this hollow valve rod, auxiliary valve core intracavity is equipped with auxiliary valve core, main valve core intracavity is equipped with the main valve core, and be equipped with the case pressure spring that drives auxiliary valve core and move down between this auxiliary valve core and the electromagnetic control portion, main valve core chamber intercommunication has air inlet and gas outlet, this auxiliary valve core chamber and main valve core chamber link up and arrange, be equipped with inlet duct and exhaust duct in this main valve core, this inlet duct is including inlet port and the auxiliary hole that admits air that communicates in proper order, this exhaust duct runs through main valve core, this exhaust duct is including the exhaust hole and the auxiliary hole that communicate in proper order, and exhaust auxiliary hole all distributes along main valve core axis, this auxiliary valve core is equipped with the sealing head subassembly that can seal main valve core exhaust hole.
In an embodiment of the present utility model, an air inlet aperture of the main valve core is smaller than an air outlet aperture.
In one embodiment of the present utility model, the inner diameter of the secondary spool chamber is smaller than the inner diameter of the primary spool chamber, and the primary spool may abut against a step between the secondary spool chamber and the primary spool chamber.
In an embodiment of the utility model, a first chamber and a second chamber are arranged in the auxiliary valve core, the valve core pressure spring is positioned in the first chamber, the sealing head assembly comprises a positioning ring, a sealing head and a sealing head pressure spring, the sealing head pressure spring is arranged in the second chamber, one end of the sealing head is inserted into the sealing head pressure spring, the sealing head can slide in the second chamber, the positioning ring is fixed at a port of the second chamber, and the sealing head is provided with a stop ring which can be abutted with the positioning ring.
In one embodiment of the utility model, the sealing head is provided with a sealing spike.
In an embodiment of the utility model, the electromagnetic control portion includes a coil portion and an iron core, the coil portion is fixed to the valve body, the iron core is disposed in the coil portion, and the iron core can magnetically attract the auxiliary valve core.
The technical scheme of the utility model has at least the following advantages and beneficial effects:
Compared with the prior art that the main valve core cavity is communicated with the auxiliary valve core cavity through the communication hole, the utility model omits the existing screw sleeve structure, achieves the purpose of reducing the volume of the electromagnetic valve, and omits the fine holes communicated between the main valve core cavity and the auxiliary valve core cavity compared with the prior art, so that the utility model can be suitable for high-pressure filling.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional solenoid valve;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model;
FIG. 4 is a schematic illustration of the present utility model omitting the primary and secondary spools;
FIG. 5 is a schematic view of the structure of the secondary spool of the present utility model;
FIG. 6 is a schematic structural view of a seal head according to the present utility model;
FIG. 7 is a schematic view of the main valve element of the present utility model;
FIG. 8 is a state diagram of the solenoid valve of the present utility model in an off state with the secondary spool in a first position;
FIG. 9 is a state diagram of the solenoid valve of the present utility model in an off state with the secondary spool magnetically attracted to a second position;
FIG. 10 is a state diagram of the solenoid valve of the present utility model in an open state with the secondary spool in a second position;
FIG. 11 is a state diagram of the main valve element being blocked when the solenoid valve of the present utility model is in an open state and the secondary valve element is moved down to the first position.
Icon: 1-hollow valve rod, 11-auxiliary valve core cavity, 12-main valve core cavity, 13-step, 2-valve body, 3-electromagnetic control part, 31-coil part, 32-core, 41-auxiliary valve core, 411-first chamber, 412-second chamber, 42-valve core pressure spring, 43-positioning ring, 44-sealing head, 441-sealing pointed cone part, 45-sealing head pressure spring, 46-main valve core, 461-air inlet hole, 462-air inlet auxiliary hole, 463-air outlet hole, 464-air outlet auxiliary hole, 47-stop ring, 51-air inlet hole, 52-air outlet hole, 61-existing valve rod, 62-existing screw sleeve, 63-existing valve body.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, if the azimuth or positional relationship indicated by the terms "inner", "outer", etc. appears to be based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.
In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "configured," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 2-11, the present embodiment relates to a high-pressure hydrogenation electromagnetic valve, which includes a hollow valve rod 1, a valve body 2 and an electromagnetic control portion 3 fixed on the valve body 2, wherein one end of the hollow valve rod 1 is connected with the electromagnetic control portion 3, the other end of the hollow valve rod 1 is connected with the valve body 2, the electromagnetic control portion 3 includes a coil portion 31 and an iron core 32, the coil portion 31 is fixed on the valve body 2, the iron core 32 is positioned in the coil portion 31, when the coil portion 31 is energized, the coil portion 31 and the iron core 32 form an electromagnet, and it is required to say that the coil portion 31 and the iron core 32 are all made of the prior art, and a person skilled in the art can select the model or specification of the coil portion 31 and the iron core 32 according to actual needs.
Referring to fig. 2, an auxiliary spool chamber 11 and a main spool chamber 12 are provided in the hollow valve rod 1, and the auxiliary spool chamber 11 and the main spool chamber 12 are arranged in a penetrating manner, so that compared with the prior art in which the main spool chamber 12 is communicated with the auxiliary spool chamber 11 through a communication hole, the existing screw sleeve structure is omitted, and the purpose of reducing the volume of the electromagnetic valve is achieved.
The auxiliary valve core 41 is arranged in the auxiliary valve core cavity 11, dynamic sealing is realized between the auxiliary valve core 41 and the auxiliary valve core cavity 11 through a sealing ring, a valve core pressure spring 42 for driving the auxiliary valve core 41 to move downwards is arranged between the auxiliary valve core 41 and the iron core 32, when the coil part 31 is electrified, the iron core 32 magnetically attracts the auxiliary valve core 41, and further drives the auxiliary valve core 41 to move upwards, and when the coil part 31 is powered off, the auxiliary valve core 41 moves downwards under the action of the valve core pressure spring 42. The air inlet 51 and the air outlet 52 of the valve body 2 are communicated with the main valve core cavity 12, the main valve core 46 is arranged in the main valve core cavity 12, when the main valve core 46 is positioned at the first position, the main valve core 46 cuts off the communication between the air inlet 51 and the air outlet 52, the high-pressure hydrogenation electromagnetic valve is in a closed state, when the main valve core 46 is positioned at the second position, the main valve core 46 opens the communication between the air inlet 51 and the air outlet 52, and the high-pressure hydrogenation electromagnetic valve is in an open state.
Referring to fig. 3, it should be noted that the inner diameter of the secondary spool chamber 11 is smaller than the inner diameter of the main spool chamber 12, that is, a step 13 is provided between the secondary spool chamber 11 and the main spool chamber 12, when the main spool 46 moves in the main spool chamber 12, the main spool 46 slides up to abut against the step 13, and the main spool 46 cannot slide up any more.
Referring to fig. 2 and 4, in the present embodiment, a first chamber 411 and a second chamber 412 are further provided in the secondary valve core 41, the valve core compression spring 42 is installed in the first chamber 411, the secondary valve core 41 is provided with a sealing head 44 assembly capable of sealing the exhaust hole 463 of the primary valve core 46, the sealing head 44 assembly includes a positioning ring 43, a sealing head 44 and a sealing head 44 compression spring, the sealing head 44 compression spring is installed in the second chamber 412, one end of the sealing head 44 is inserted into the sealing head 44 compression spring, the sealing head 44 can slide in the second chamber 412, the positioning ring 43 is fixed at a port of the second chamber 412, the sealing head 44 is provided with a stop ring 47 capable of abutting against the positioning ring 43, and the stop of the sealing head 44 is realized through the stop ring 47, so as to prevent the sealing head 44 from separating from the secondary valve core 41.
Referring to fig. 5, the sealing head 44 is provided with a sealing tapered portion 441, and when the sealing tapered portion 441 is fully inserted into the exhaust hole 463 of the main valve element 46, the sealing tapered portion 441 seals the exhaust hole 463.
Referring to fig. 2 and 6, a main valve core 46 is disposed in the main valve core cavity 12, dynamic sealing is achieved between the main valve core 46 and the main valve core cavity 12 through a sealing ring, an air inlet 461 and an air outlet 463 are disposed in the main valve core 46, the air inlet 461 includes an air inlet 461 and an air inlet auxiliary hole 462 which are sequentially communicated, the air outlet 463 passes through the main valve core 46, the air outlet 463 includes an air outlet 463 and an air outlet auxiliary hole 464 which are sequentially communicated, the air outlet 463 and the air outlet 463 are both distributed along the axis of the main valve core 46, the apertures of the air inlet 462 and the air outlet 464 are equal, the aperture of the air inlet 461 is smaller than the aperture of the air outlet 463, when the main valve core 46 is located at the first position, fluid entering from the air inlet 51 sequentially flows through the air inlet 461, the air inlet auxiliary hole 462, the air outlet 463 and the air outlet 464, and then flows to the air outlet 52, because the aperture of the air inlet 461 is smaller than the aperture of the air outlet 463, the air inlet pressure of the main valve core 46 is larger than the air outlet pressure, so that the main valve core 46 is forced to move upwards to the second position, namely, the air inlet 51 and the air outlet 463 of the valve body is communicated.
The working process comprises the following steps: referring to fig. 8 to 11, when it is necessary to open the high-pressure solenoid valve, the solenoid control section 3 energizes the coil section 31, and the sub-valve element 41 is magnetically attracted by the iron core 32 and moves upward until it is attracted by the iron core 32. The high-pressure fluid introduced from the outside flows into the air inlet 51, the fluid flows through the air inlet 461, the air inlet auxiliary hole 462, the air outlet 463 and the air outlet auxiliary hole 464 in order, and then flows to the air outlet 52, the air inlet pressure of the main valve core 46 is larger than the air outlet pressure because the aperture of the air inlet 461 is smaller than that of the air outlet 463, so that the main valve core 46 moves upward to the second position, that is, the air inlet 51 and the air outlet of the valve body 2 are communicated, the sealing taper portion 441 is inserted into the air outlet 463, but does not completely seal the air outlet 463, so that the fluid flows out of the air outlet 463, at this time, the fluid mainly flows out of the air outlet directly, and the air inlet 461 and the air outlet 463 of the main valve core 46 are the same in pressure, so that the main valve core 46 is not driven upward, that the main valve core 46 is kept in the equilibrium state, that is kept in the second position, and the air inlet 51 and the air outlet of the valve body 2 are kept communicated.
When the high-pressure hydrogenation electromagnetic valve needs to be closed, the electromagnetic control part 3 cuts off the power supply to the coil part 31, the auxiliary valve core 41 is not attracted by the iron core 32 any more, the auxiliary valve core 41 moves downwards due to the valve core pressure spring 42 until the auxiliary valve core pressure spring is abutted against the stop ring 47 to stop moving downwards, at the moment, the sealing pointed cone part 441 just seals the exhaust hole 463 of the main valve core 46 completely, the top of the main valve core 46 does not flow any more, and the air flow at the periphery of the air inlet 461 still flows at a high speed, so the pressure at the periphery of the air inlet 461 is smaller than the pressure at the top of the main valve core 46, namely the main valve core 46 is subjected to downward pressure, the gravity action of the main valve core 46 is overlapped, and the main valve core 46 starts to move downwards until the main valve core 46 completely cuts off the communication between the air inlet 51 and the air outlet, namely the high-pressure hydrogenation electromagnetic valve is closed.
In this embodiment, the main spool chamber 12 and the auxiliary spool chamber 11 are communicated, so that compared with the prior art in which the main spool chamber 12 is communicated with the auxiliary spool chamber 11 through the communication hole, the existing screw sleeve structure is omitted, the purpose of reducing the volume of the electromagnetic valve is achieved, and compared with the prior art, the fine holes communicated between the main spool chamber 12 and the auxiliary spool chamber 11 are omitted, so that the utility model can be suitable for high-pressure filling.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides a high-pressure hydrogenation solenoid valve, including hollow valve rod, the valve body and be fixed in the electromagnetic control portion of this valve body, this hollow valve rod one end is connected with electromagnetic control portion, this hollow valve rod other end is connected with the valve body, be equipped with auxiliary valve core chamber and main valve core chamber in this hollow valve rod, auxiliary valve core intracavity is equipped with auxiliary valve core, main valve core intracavity is equipped with the main valve core, and be equipped with the case pressure spring that drives auxiliary valve core and move down between this auxiliary valve core and the electromagnetic control portion, main valve core chamber intercommunication has air inlet and gas outlet, characterized in that, this auxiliary valve core chamber and main valve core chamber link up and arrange, be equipped with inlet channel and exhaust duct in this main valve core, this inlet channel is including inlet port and the auxiliary hole that admits air that communicates in proper order, this exhaust channel runs through the main valve core, this exhaust duct is including the exhaust hole and the auxiliary hole that communicate in proper order, and exhaust auxiliary hole all distribute along main valve core axis, this auxiliary valve core is equipped with the sealed head subassembly that can seal main valve core exhaust hole.
2. The high pressure hydrogenation solenoid valve of claim 1 wherein the inlet aperture of the main spool is smaller than the outlet aperture.
3. The high pressure solenoid valve of claim 1 wherein the inner diameter of the secondary spool chamber is smaller than the inner diameter of the primary spool chamber, the primary spool being abuttable against a step between the secondary spool chamber and the primary spool chamber.
4. The high-pressure hydrogenation electromagnetic valve according to claim 1, wherein a first chamber and a second chamber are arranged in the auxiliary valve core, the valve core pressure spring is positioned in the first chamber,
The sealing head assembly comprises a positioning ring, a sealing head and a sealing head pressure spring, wherein the sealing head pressure spring is arranged in the second cavity, one end of the sealing head is inserted into the sealing head pressure spring and can slide in the second cavity, the positioning ring is fixed at a port of the second cavity, and the sealing head is provided with a stop ring which can be abutted with the positioning ring.
5. The high pressure hydrogenation solenoid valve of claim 4 wherein the sealing head is provided with a sealing spike.
6. The high-pressure solenoid valve according to claim 1, wherein the electromagnetic control portion includes a coil portion fixed to the valve body and an iron core provided in the coil portion, and the iron core magnetically attracts the sub-spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323082953.0U CN221121139U (en) | 2023-11-13 | 2023-11-13 | High-pressure hydrogenation electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323082953.0U CN221121139U (en) | 2023-11-13 | 2023-11-13 | High-pressure hydrogenation electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221121139U true CN221121139U (en) | 2024-06-11 |
Family
ID=91362499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323082953.0U Active CN221121139U (en) | 2023-11-13 | 2023-11-13 | High-pressure hydrogenation electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221121139U (en) |
-
2023
- 2023-11-13 CN CN202323082953.0U patent/CN221121139U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE46081E1 (en) | Solenoid gas valve | |
| US7322562B2 (en) | Shut-off valve providing pressure equalization | |
| US6520206B2 (en) | Bi-directional pilot type electromagnetic valves | |
| US20060043323A1 (en) | In-tube solenoid gas valve | |
| EP1295057B1 (en) | Crashproof instant-on valve | |
| GB1562798A (en) | Internal combustion engine electromagnetic fuel injector | |
| CN201326477Y (en) | Two-control-in-one-position pneumatic pilot-valve used in gelled-propellant supply system | |
| CN221121139U (en) | High-pressure hydrogenation electromagnetic valve | |
| DE60010889D1 (en) | HIGH PRESSURE ELECTROMAGNET CONTROLLED VALVE | |
| CN108825828A (en) | A kind of electric control one-way valve | |
| US5623960A (en) | Solenoid-operated valve for thermally insulated piping and attachment construction therefor | |
| CN216951913U (en) | Pilot-operated type electromagnetic valve structure | |
| US5328151A (en) | Solenoid valve | |
| EP1969270B1 (en) | In-tube solenoid gas valve | |
| CN115707891A (en) | Novel electromagnetic valve structure | |
| CN213629056U (en) | Fuel electromagnetic valve with one-way function | |
| JP2023539911A (en) | Tank device for storing gaseous media with a valve device | |
| CN216143236U (en) | Pneumatic valve for vehicle-mounted liquefied gas bottle | |
| CN201306511Y (en) | A high pressure pilot electromagnetic valve | |
| CN219796290U (en) | Two-position two-way direct-acting normally-closed electromagnetic valve | |
| CN211117893U (en) | Ultrahigh pressure pilot-operated electromagnetic valve | |
| CN219820604U (en) | High-pressure blowing cylinder | |
| CN221443649U (en) | Balanced type quick plug-in assembly and air supply device | |
| CN201255263Y (en) | Novel pilot-operated electromagnetic valve for oiling machine | |
| US20030075700A1 (en) | Tank valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |