CN204738920U - Reciprocating piston pump of liquefied natural gas gas cylinder for car - Google Patents
Reciprocating piston pump of liquefied natural gas gas cylinder for car Download PDFInfo
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- CN204738920U CN204738920U CN201520465019.3U CN201520465019U CN204738920U CN 204738920 U CN204738920 U CN 204738920U CN 201520465019 U CN201520465019 U CN 201520465019U CN 204738920 U CN204738920 U CN 204738920U
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- piston body
- liquefied natural
- natural gas
- way valve
- pumping cavity
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Abstract
The utility model discloses a reciprocating piston pump of liquefied natural gas gas cylinder for car, including confined pump sending cavity and can the pump sending cavity in reciprocating motion's piston body, this piston body is by hydraulic drive, the inlet department of pump sending cavity by a check valve shutoff, the liquid outlet department of pump sending cavity by two shutoff on the check valve, the shutoff opposite direction of check valve no. 1 and check valve no. 2 wherein, check valve no. 2 is opened to the piston body when the inlet moves, the motion of the reverse inlet of piston body the time open check valve no. 1. Adopt hydraulic drive's piston pump, realize the automatic control to the LNG extraction to designed confined pump sending cavity, the piston pump of being convenient for at the pressure control of LNG extraction in -process, is compared from the pressure boost mode, after the extraction LNG, remains for a short time in the LNG bottle, and all adopted the check valve design at inlet and the liquid outlet of pump sending cavity, the airtight environment of not only having guaranteed the pump sending cavity can also be prevented and treated liquid and flow back.
Description
Technical field
The utility model relates to LNG output unit, especially a kind of reciprocating piston pump of automobile liquefied natural gas bottle.
Background technique
LNG (liquefied natural gas) i.e. LNG Liquefied natural gas, its main component is methane.Compare gasoline due to LNG or diesel oil possesses larger energy demand advantages and environment-friendly advantage, institute thinks that most of automobile vendor and operator praised highly.But LNG compares the inferior position that traditional automotive fuel has again low temperature, all there is a uppity difficult problem when annotating and use.Early stage automobile LNG bottle adopts and exports LNG from supercharging mode, namely LNG gasify in bottle increase pressure LNG is extruded, this mode not only needs the time long from boost process, and Stress control extremely inconvenient easily cause for unsaturated vapor or air feed excessive, the residual quantity simultaneously in LNG bottle is often also larger.
Although also there is document to disclose the correlation technique of cryogenic liquid pump, really to be applied to storing temperature generally at the LNG of subzero 162 degrees centigrade, or there is the difficult problem on backflow and Stress control.
Model utility content
The object of model utility is for the problems referred to above, provides one and can prevent fuel return, Stress control automobile LNG bottle reciprocating piston pump easily.
For achieving the above object, model utility have employed following technical proposal: a kind of reciprocating piston pump of automobile liquefied natural gas bottle, comprise closed pumping cavity and can in described pumping cavity reciprocating piston body, this piston body is by hydraulic driving, at the liquid entering hole place of pumping cavity by one-way valve one shutoff, at the liquid outlet place of pumping cavity by one-way valve two shutoff, wherein the shutoff direction of one-way valve one and one-way valve two is contrary, described piston body opens one-way valve two when liquid entering hole moves, one-way valve one is opened when the reverse liquid entering hole of described piston body moves.Have employed by hydraulically powered piston pump structure, and define closed pumping cavity, pressure in pumping cavity is changed and depends on the moving situation of piston body, and then pumping cavity internal pressure is become be easy to control, thus make the process of pumping LNG also be convenient to control.Simultaneously all have employed one-way valve to prevent liquid backflow by the liquid entering hole of pumping cavity and liquid outlet.
As preferably, when described piston body moves to top towards liquid entering hole, this piston body occupies the inner space at least 90% of described pumping cavity.When the reverse liquid entering hole motion of piston body, occur vacuum space in pumping cavity, piston body is larger to the inner space occupying pumping cavity during top, then the pressure in pumping cavity can be larger with extraneous pressure reduction, is also more convenient to control.
As preferably, be provided with the passage for carrying liquid between described liquid outlet and described pumping cavity, this passage is L shape and receiving fluids is detained.Due to the high-speed motion of piston body, so be the use of L shape detention space as buffering using the channels designs of conveying liquid.
As preferably, the material that described piston body adopts is steel, and its weight percentage containing chromium is 20%, and nickeliferous weight percentage is 11%.
As preferably, piston body head end is labyrinth seal structure.
As preferably, described one-way valve one comprises T-shaped valve body and valve seat, connected by low temperature resistant spring one between T-shaped valve body and valve seat one, described valve seat is positioned at feed pathway, described T-shaped valve body comprises dome portion, and this dome portion is positioned at described pumping cavity and pulls to described liquid entering hole and shutoff by described spring one.
As preferably, described one-way valve two comprises sphere valve body, this sphere valve body linking springs two, sphere valve body is pressed to described liquid outlet, by the liquid outlet described in the sphere shutoff of sphere valve body in the passage that liquid outlet outside is fixed in spring two one end.
Compared with prior art, the advantage of model utility is: adopt hydraulically powered reciprocating pump, realize the automatic control that LNG is extracted, and devise closed pumping cavity, be convenient to the Stress control of reciprocating pump in LNG extraction process, compare from supercharging mode, after extracting LNG, residual little in LNG bottle, and all have employed one-way valve designs at the liquid entering hole of pumping cavity and liquid outlet, not only ensure that the closed environment of pumping cavity can also prevent and treat liquid backflow.Elastic design application all be have employed for one-way valve, and devise different sealing surfaces for the different shutoff directions of two one-way valves.
Accompanying drawing explanation
In order to be illustrated more clearly in model utility embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of model utility, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged diagram at sealed cavity position of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in model utility embodiment, be clearly and completely described the technological scheme in model utility embodiment, obviously, described embodiment is only model utility part embodiment, instead of whole embodiments.Based on the embodiment in model utility, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of utility model protection.
As shown in Figure 1, 2, a kind of reciprocating piston pump of automobile liquefied natural gas bottle, it forms the oil hydraulic pump 1 included as power plant, oil hydraulic pump connects piston body 3 by connecting rod 2, wherein piston body 3 is reciprocating in the pumping cavity 4 closed, in order to prevent the LNG liquid entering pumping cavity from being leaked by piston body, piston body 3 have employed labyrinth seal structure.The liquid entering hole 12 of pumping cavity 4 is communicated with netted liquid inlet head 5, and this liquid inlet head 5 is buried under the LNG liquid level in LNG bottle.At liquid entering hole 12 place of pumping cavity by one-way valve one shutoff, at liquid outlet 13 place of pumping cavity by one-way valve two shutoff, wherein the shutoff direction of one-way valve one and one-way valve two is contrary.
Oil hydraulic pump 1 driven plunger body 3 moves, and opens one-way valve two when described piston body moves towards liquid entering hole, opens one-way valve one when the reverse liquid entering hole of described piston body moves.Owing to have employed hydraulic driving mode, realize the automatic control for LNG Liquid extracting, and devise closed pumping cavity, the pressure in pumping cavity is made to change the moving situation depending on piston body, and then pumping cavity internal pressure is become be easy to control, thus make the process of pumping LNG liquid also be convenient to control, compare from supercharging mode simultaneously, after extraction LNG liquid, residual little in LNG bottle.All adopt elastic one-way valve to prevent LNG liquid backflow at the liquid entering hole of pumping cavity and liquid outlet.
Due to the low-temperature characteristics of LNG liquid, its mobility is relatively low, in the hydraulically powered situation of employing, present embodiment is provided with the passage 6 for carrying liquid between described liquid outlet 13 and described pumping cavity, and this passage is L shape and the use of receiving fluids delay conduct buffering.
As preferably, the material that described piston body adopts is steel, and its weight percentage containing chromium is 20%, and nickeliferous weight percentage is 11%.Piston body formula vitals of the present utility model, in order to adapt to the characteristic of LNG liquid, design is optimized to piston body material, mainly add the content of chromium and nickel, wherein increase chromium and increase corrosion resistance, increase nickel and increase low temperature resistivity, through test of many times, adopt the steel material in the present embodiment, piston body can at least normally use 10 years.
As a kind of preferred implementation of one-way valve one, participate in Fig. 2, described one-way valve one comprises T-shaped valve body 7 and valve seat 9, connected by low temperature resistant spring 1 between T-shaped valve body and valve seat one, described valve seat 9 is positioned at feed pathway, described T-shaped valve body comprises dome portion 71, and this dome portion 71 is positioned at described pumping cavity 4 and pulls to described liquid entering hole 12 and shutoff by described spring 1.When piston body 3 moves towards liquid entering hole, pressure increase in pumping cavity 4, described dome portion 71 keeps the sealing relationship between liquid entering hole, when oppositely liquid entering hole moves piston body 3, pressure in pumping cavity 4 reduces, and under differential pressure action, described spring 1 is compressed, described dome portion 71 keeps not in sealing between liquid entering hole, and one-way valve one is opened.
As a kind of preferred implementation of one-way valve two, participate in Fig. 2, described one-way valve two comprises sphere valve body 8, this sphere valve body linking springs 2 11, sphere valve body is pressed to described liquid outlet, by the liquid outlet described in the sphere shutoff of sphere valve body 8 in the passage that liquid outlet outside is fixed in spring 2 11 one end.When oppositely liquid entering hole moves piston body 3, the pressure in pumping cavity 4 reduces, and under pressure reduction and the effect of described spring 1, the sphere of sphere valve body 8 and liquid outlet 13 keep sealing.When piston body 3 moves towards liquid entering hole, the pressure increase in pumping cavity 4, shown spring 2 11 is compressed, and no longer seal between the sphere of described sphere valve body 8 and liquid outlet, LNG liquid pumps from liquid outlet.
The foregoing is only the preferred embodiment of model utility, not in order to limit model utility, within all spirit in model utility and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in model utility.
Claims (7)
1. the reciprocating piston pump of an automobile liquefied natural gas bottle, it is characterized in that: comprise closed pumping cavity and can in described pumping cavity reciprocating piston body, this piston body is by hydraulic driving, at the liquid entering hole place of pumping cavity by one-way valve one shutoff, at the liquid outlet place of pumping cavity by one-way valve two shutoff, wherein the shutoff direction of one-way valve one and one-way valve two is contrary, described piston body opens one-way valve two when liquid entering hole moves, opens one-way valve one when the reverse liquid entering hole of described piston body moves.
2. the reciprocating piston pump of automobile liquefied natural gas bottle according to claim 1, is characterized in that: when described piston body moves to top towards liquid entering hole, this piston body occupies the inner space at least 90% of described pumping cavity.
3. the reciprocating piston pump of automobile liquefied natural gas bottle according to claim 2, is characterized in that: be provided with the passage for carrying liquid between described liquid outlet and described pumping cavity, and this passage is L shape and receiving fluids is detained.
4. the reciprocating piston pump of automobile liquefied natural gas bottle according to claim 1, is characterized in that: the material that described piston body adopts is steel, and its weight percentage containing chromium is 20%, and nickeliferous weight percentage is 11%.
5. the reciprocating piston pump of the automobile liquefied natural gas bottle according to claim 1 or 4, is characterized in that: piston body head end is labyrinth seal structure.
6. the reciprocating piston pump of automobile liquefied natural gas bottle according to claim 1, it is characterized in that: described one-way valve one comprises T-shaped valve body and valve seat, connected by low temperature resistant spring one between T-shaped valve body and valve seat one, described valve seat is positioned at feed pathway, described T-shaped valve body comprises dome portion, and this dome portion is positioned at described pumping cavity and pulls to described liquid entering hole and shutoff by described spring one.
7. the reciprocating piston pump of automobile liquefied natural gas bottle according to claim 1, it is characterized in that: described one-way valve two comprises sphere valve body, this sphere valve body linking springs two, sphere valve body is pressed to described liquid outlet, by the liquid outlet described in the sphere shutoff of sphere valve body in the passage that liquid outlet outside is fixed in spring two one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465019.3U CN204738920U (en) | 2015-07-02 | 2015-07-02 | Reciprocating piston pump of liquefied natural gas gas cylinder for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465019.3U CN204738920U (en) | 2015-07-02 | 2015-07-02 | Reciprocating piston pump of liquefied natural gas gas cylinder for car |
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| Publication Number | Publication Date |
|---|---|
| CN204738920U true CN204738920U (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520465019.3U Active CN204738920U (en) | 2015-07-02 | 2015-07-02 | Reciprocating piston pump of liquefied natural gas gas cylinder for car |
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| CN (1) | CN204738920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929887A (en) * | 2015-07-02 | 2015-09-23 | 杭州富士达特种材料有限公司 | Reciprocating piston pump of liquefied natural gas cylinder for automobile |
| CN110185598A (en) * | 2019-06-24 | 2019-08-30 | 山东奥扬新能源科技股份有限公司 | Booster pump built in a kind of automobile-used cryogenic natural gas bottle |
-
2015
- 2015-07-02 CN CN201520465019.3U patent/CN204738920U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929887A (en) * | 2015-07-02 | 2015-09-23 | 杭州富士达特种材料有限公司 | Reciprocating piston pump of liquefied natural gas cylinder for automobile |
| CN110185598A (en) * | 2019-06-24 | 2019-08-30 | 山东奥扬新能源科技股份有限公司 | Booster pump built in a kind of automobile-used cryogenic natural gas bottle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tong Hongwei Inventor before: Ying Jianming Inventor before: Lu Keming Inventor before: Zhao Hao |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160504 Address after: 419, room 699, block B, Meilin Road, Tonglu Economic Development Zone, Tonglu County, Hangzhou, Zhejiang, 311500 Patentee after: HANGZHOU WEST PORT LOW TEMPERATURE TECHNOLOGY CO., LTD. Address before: 516, room 699, block B, Meilin Road, Tonglu Economic Development Zone, Hangzhou, Zhejiang, 311500, China Patentee before: Hangzhou Fushida Special Material Co.,Ltd. |