CN203335878U - Gas return structure for liquefied natural gas filling device - Google Patents
Gas return structure for liquefied natural gas filling device Download PDFInfo
- Publication number
- CN203335878U CN203335878U CN201320439020XU CN201320439020U CN203335878U CN 203335878 U CN203335878 U CN 203335878U CN 201320439020X U CN201320439020X U CN 201320439020XU CN 201320439020 U CN201320439020 U CN 201320439020U CN 203335878 U CN203335878 U CN 203335878U
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- Prior art keywords
- spool
- valve
- valve body
- liquefied natural
- filling device
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Abstract
The utility model discloses a gas return structure for a liquefied natural gas filling device. The structure comprises a valve body (14), a spool assembly and a clamping spring (2). A valve cavity (4) is arranged in the valve body (14), the spool assembly is matched in the valve cavity (4) in a sliding mode, and the upper end of the spool assembly is connected with valve body (14) through the clamping spring (2). The spool assembly comprises a spool (12), at least one annular abrasion-resistant ring (5) is embedded in the outer circumferential wall of the spool (12), the spool (12) is matched with the inner wall of the valve cavity (4) through the annular abrasion-resistant ring (5) in a sliding mode, and a gas channel communicating the valve cavity (4) with a gas return port (8) is arranged at the lower end of the spool (12). By means of the structure, movement of the spool is achieved through sliding match of the annular abrasion-resistant ring and a valve cavity wall of a valve body, and therefore movement of the spool in the valve body cannot be influenced even if temperature is lower, and normal work of the gas return port end is ensured.
Description
Technical field
The utility model relates to the technical field of valve, is specifically a kind of structure of the return-air for liquefied natural gas filling device.
Background technique
At present, along with the requirement to motor vehicle exhaust emission is more and more higher, and traditional automotive fuel is day by day in short supply, adopts rock gas more and more to receive publicity as the gas-fueled vehicles of automotive fuel.Gas-fueled vehicles, be that natural gas steel cylinder is set on car body, utilizes the natural gas compressing gas stored in steel cylinder that the automobile of power is provided to automobile.Gas pressure in natural gas cylinder is during lower than the rated pressure value, and the residual air in steel cylinder will be reclaimed, and therefore, can the return-air rifle on filling machine and automobile-used natural gas steel cylinder be coupled together by connection set.As shown in Figure 1, return-air for the liquefied natural gas filling device structure of prior art comprise valve body 08, mangetic core assembly 06 and and cap 03, mangetic core assembly 06 is slidably fitted in valve body 08, and an end of an end of mangetic core assembly 06 and valve body 08 forms valve, and the other end of mangetic core assembly 06 passes through and cap 03 is connected with valve body 08 with jump ring 02; Valve body 08 has gas returning port 09 at an end of valve, have inflation inlet 01 away from an end of valve, and the gap between cap 03 and valve body 08 is gas channel 04.Its working principle is: the normal condition lower valve is to close, so gas returning port 09 is closed; When needs reclaim the residual air in steel cylinder, the return-air rifle by filling machine, with after the valve body of gas returning port 09 end is connected, forces mangetic core assembly 06 to move inward, valve open now, and the interior residual air of steel cylinder is successively from inflation inlet 01, gas channel 04, gas returning port 09 discharge.
But, there is following shortcoming in return-air for the liquefied natural gas filling device structure of above-mentioned this structure: because the temperature of LNG Liquefied natural gas is usually very low, the easy frosting of valve inner is frozen, therefore, slip when in mangetic core assembly, spool is slidably connected in spring seat can be hindered, thus the regular event of gas returning port end in the time of can't guaranteeing to reclaim residual air.
The model utility content
Technical problem to be solved in the utility model is, even provide a kind of temperature the low structure of the return-air for liquefied natural gas filling device that also can guarantee the proper normal work of gas returning port.
For solving the problems of the technologies described above, the structure of the return-air for liquefied natural gas filling device that the utility model provides, comprise valve body, mangetic core assembly and jump ring, there is valve pocket in described valve body, the upper end of valve pocket is inflation inlet, and lower end is gas returning port, and mangetic core assembly is slidably fitted in valve pocket, the upper end of mangetic core assembly is connected with valve body by jump ring, and lower end and valve body form valve; Described mangetic core assembly comprises spool, is embedded with at least one ring shape wear-resisting ring on the outer circle wall of spool, and spool is slidably matched by annular wear-resisting ring and valve pocket inwall; The lower end of spool has the gas channel that valve pocket is communicated with gas returning port.
The valve place of described valve body lower end comprises gland, O type circle and screw, and screw is connected with gland through the counterbore on spool, and O type circle is fixed tightly between spool and gland, and the gas returning port place of O type circle and valve body forms valve.
Described annular wear-resisting ring has two, respectively on the parallel periphery wall that is distributed in spool.
Described mangetic core assembly also comprises spring seat and spring, and lower end and the spool of spring push against, and upper end pushes against by spring seat and jump ring.
The described outer peripheral surface that is provided with the spool of gas channel is conical surface, and gas channel is radially setting, and communicates with counterbore.
After adopting above structure, the utility model compared with prior art, have the following advantages: owing to adopting, the structure of annular wear-resisting ring is set on spool cylindrical wall, the movement that is slidably matched to realize spool of the valve cavity wall by annular wear-resisting ring and valve body, therefore, the cylindrical wall of spool does not contact with valve cavity wall, even temperature is low again, can not affect the movement of spool in valve body yet, thereby guarantee the proper normal work of gas returning port.
The accompanying drawing explanation
Fig. 1 is for the structural representation of the return-air structure of liquefied natural gas filling device in prior art.
Fig. 2 is the structural representation of the utility model for the return-air structure of liquefied natural gas filling device.
Wherein:
In prior art: 01, inflation inlet; 02, jump ring; 03 and cap; 04, gas channel; 05, spring; 06, mangetic core assembly; 07, spring seat; 08, valve body; 09, gas returning port;
The utility model: 1, inflation inlet; 2, jump ring; 3, spring seat; 4, valve pocket; 5, annular wear-resisting ring; 6, counterbore; 7, gas channel; 8, gas returning port; 9, gland; 10, O type circle; 11, screw; 12, spool; 13, spring; 14, valve body.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
The utility model as shown in Figure 2 is known for the structural representation of the return-air structure of liquefied natural gas filling device, it comprises valve body 14, mangetic core assembly and jump ring 2, there is valve pocket 4 in described valve body 14, the upper end of valve pocket 4 is inflation inlet 1, lower end is gas returning port 8, mangetic core assembly is slidably fitted in valve pocket 4, and the upper end of mangetic core assembly is connected with valve body 14 by jump ring 2, and lower end and valve body 14 form valve.Described mangetic core assembly comprises spool 12, is embedded with at least one ring shape wear-resisting ring 5 on the outer circle wall of spool 12, and spool 12 is slidably matched with valve pocket 4 inwalls by annular wear-resisting ring 5.The lower end of spool 12 has the gas channel 7 that valve pocket 4 is communicated with gas returning port 8.In the present embodiment, described annular wear-resisting ring 5 has two, respectively on the parallel periphery wall that is distributed in spool 12.
The valve place of described valve body 14 lower ends comprises gland 9, O type circle 10 and screw 11, and screw 11 is connected with gland 9 through the counterbore 6 on spool 12, and O type circle 10 is fixed tightly between spool 12 and gland 9, and O type circle 10 forms valve with gas returning port 8 places of valve body 14.
Described mangetic core assembly also comprises spring seat 3 and spring 13, and the lower end of spring 13 and spool 12 push against, and upper end pushes against by spring seat 3 and jump ring 2.
The described outer peripheral surface that is provided with the spool 12 of gas channel 7 is conical surface, and gas channel 7 is radially setting, and communicates with counterbore 6.
Working principle of the present utility model is: the valve at gas returning port 8 places is closed under normal circumstances, when needs reclaim the residual air in steel cylinder, by the return-air rifle by filling machine with after the valve body of gas returning port 8 ends is connected, forcing spool 12 to drive annular wear-resisting ring 5 moves up, valve open now, the residual air in steel cylinder is discharged from inflation inlet 1, valve pocket 4, counterbore 6, gas channel 7 and gas returning port 8 successively.
Claims (5)
1. the structure of the return-air for liquefied natural gas filling device, comprise valve body (14), mangetic core assembly and jump ring (2), there is valve pocket (4) in described valve body (14), the upper end of valve pocket (4) is inflation inlet (1), lower end is gas returning port (8), mangetic core assembly is slidably fitted in valve pocket (4), and the upper end of mangetic core assembly is connected with valve body (14) by jump ring (2), and lower end and valve body (14) form valve; It is characterized in that: described mangetic core assembly comprises spool (12), is embedded with at least one ring shape wear-resisting ring (5) on the outer circle wall of spool (12), and spool (12) is slidably matched by annular wear-resisting ring (5) and valve pocket (4) inwall; The lower end of spool (12) has the gas channel (7) that valve pocket (4) is communicated with gas returning port (8).
2. the structure of the return-air for liquefied natural gas filling device according to claim 1, it is characterized in that: the valve place of described valve body (14) lower end comprises gland (9), O type circle (10) and screw (11), screw (11) is connected with gland (9) through the counterbore (6) on spool (12), and O type circle (10) is fixed tightly between spool (12) and gland (9), O type circle (10) locates to form valve with the gas returning port (8) of valve body (14).
3. the structure of the return-air for liquefied natural gas filling device according to claim 1, it is characterized in that: described annular wear-resisting ring (5) has two, respectively on the parallel periphery wall that is distributed in spool (12).
4. the structure of the return-air for liquefied natural gas filling device according to claim 1, it is characterized in that: described mangetic core assembly also comprises spring seat (3) and spring (13), the lower end of spring (13) and spool (12) push against, and upper end pushes against by spring seat (3) and jump ring (2).
5. the structure of the return-air for liquefied natural gas filling device according to claim 1, it is characterized in that: the described outer peripheral surface that is provided with the spool (12) of gas channel (7) is conical surface, gas channel (7) is radially setting, and communicates with counterbore (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439020XU CN203335878U (en) | 2013-07-19 | 2013-07-19 | Gas return structure for liquefied natural gas filling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439020XU CN203335878U (en) | 2013-07-19 | 2013-07-19 | Gas return structure for liquefied natural gas filling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335878U true CN203335878U (en) | 2013-12-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320439020XU Expired - Fee Related CN203335878U (en) | 2013-07-19 | 2013-07-19 | Gas return structure for liquefied natural gas filling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203335878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
-
2013
- 2013-07-19 CN CN201320439020XU patent/CN203335878U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN104847937B (en) * | 2015-05-18 | 2017-05-03 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20170719 |