CN204704195U - A kind of CNG hydraulic substation prevents high pressure oil return apparatus - Google Patents
A kind of CNG hydraulic substation prevents high pressure oil return apparatus Download PDFInfo
- Publication number
- CN204704195U CN204704195U CN201520215867.9U CN201520215867U CN204704195U CN 204704195 U CN204704195 U CN 204704195U CN 201520215867 U CN201520215867 U CN 201520215867U CN 204704195 U CN204704195 U CN 204704195U
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- China
- Prior art keywords
- oil
- pressure
- bridge
- piping
- oil return
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of CNG hydraulic substation and prevents high pressure oil return apparatus.First-four pneumatic actuator connects into bridge oil piping, and the oil inlet end 1 of bridge oil piping is communicated with fuel tank by high-pressure service pump, and first, second oil outlet end of bridge oil piping seals with gas cylinder and communicates, and the 3rd oil outlet end of bridge oil piping is communicated with fuel tank by total scavenger valve; 3rd oil outlet end of described bridge oil piping is connected in series pressure transmitter with between total scavenger valve, be used for detecting the pressure of return line in oil return process and the pressure at this oil return bottle of certain time point, the first described-four pneumatic actuator, pressure transmitter are electrically connected with PLC.Effectively can prevent high pressure oil return phenomenon.
Description
Technical field
The utility model belongs to a kind of hydraulic protector of hydraulic substation, and particularly a kind of CNG hydraulic substation prevents high pressure oil return apparatus.
Background technique
Rock gas is a kind of high-quality clean energy; the material that can affect human breathing health produced in its combustion process is few; without waste residue, waste water generation after burning, having the advantages such as safety, calorific value are high, clean compared to coal, oil equal energy source, is one of optimal fuel of protection of the environment.The advantages such as natural gas automobile secondary gas filling station has little investment, and ability to work is high, and operating cost is low, automatically controls, very little maintenance, stable, development prospect is wide.But easily there is high pressure oil return phenomenon when unloading rock gas.When such as, rock gas in 3# bottle draws off completely, in 3# bottle, a large amount of hydraulic oil will be had, at this moment with regard to needing, the hydraulic oil in 3# bottle be turned back to fuel tank, and then continue oiling in 4# bottle.The high-pressure natural gas in 4# to 8# bottle will be caused to penetrate in 3# bottle owing to leaking in trailer front storehouse 3# bottle pneumatic actuator tracheae connection error or pneumatic actuator, make the 1MPa pressure only had in original 3# bottle become 10MPa even higher, thus cause high pressure oil return.
Summary of the invention
In order to overcome the shortcoming of prior art, the utility model provides a kind of CNG hydraulic substation to prevent high pressure oil return apparatus.Effectively can prevent high pressure oil return phenomenon.
The technical scheme in the invention for solving the technical problem is: the first-four pneumatic actuator connects into bridge oil piping, the oil inlet end 1 of bridge oil piping is communicated with fuel tank by high-pressure service pump, first, second oil outlet end of bridge oil piping seals with gas cylinder and communicates, and the 3rd oil outlet end of bridge oil piping is communicated with fuel tank by total scavenger valve; 3rd oil outlet end of described bridge oil piping is connected in series pressure transmitter with between total scavenger valve, be used for detecting the pressure of return line in oil return process and the pressure at this oil return bottle of certain time point, the first described-four pneumatic actuator, pressure transmitter are electrically connected with PLC.
The utility model structure is simple, and automaticity is high, effectively can prevent high pressure oil return phenomenon.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the utility model schematic diagram.
Embodiment
As shown in Figure 1, first-four pneumatic actuator 2,3,4,6 connects into bridge oil piping, the oil inlet end 1 of bridge oil piping is communicated with fuel tank 11 by high-pressure service pump (not shown in FIG.), first, second oil outlet end 5,7 of bridge oil piping seals with gas cylinder (not shown in FIG.) and communicates, and the 3rd oil outlet end 8 of bridge oil piping is communicated with fuel tank 11 by total scavenger valve; 3rd oil outlet end 8 of described bridge oil piping is connected in series pressure transmitter 10 with between total scavenger valve, be used for detecting the pressure of return line in oil return process and the pressure at this oil return bottle of certain time point, described first-four pneumatic actuator 2,3,4,6, pressure transmitter 10 is electrically connected with PLC (not shown in FIG.).
The beacon course of described pressure transmitter 10 is 0-40Mpa.
Pressure transmitter 10 is starting the 60th second after oil return, disconnect the oil return stop valve in substation, make the pressure of return line consistent with the pressure of 3# bottle, pressure transmitter meeting detected pressures, when the pressure detected is higher than 5MPa, the so oil return of 3# bottle just existing problems, PLC control system will stop oil return; When the pressure detected is lower than 5MPa, so the oil return of 3# bottle is just in normal state, and system will continue oil return.This device can prevent high pressure oil return, can prevent the pressurized gas in bottle from getting back to fuel tank simultaneously, open Explosion-proof cap, ejection oil, thus reaches the object protecting whole substation system.
Claims (2)
1. a CNG hydraulic substation prevents high pressure oil return apparatus, first-four pneumatic actuator (2,3,4,6) connects into bridge oil piping, the oil inlet end (1) of bridge oil piping is communicated with fuel tank (11) by high-pressure service pump, first, second oil outlet end (5,7) of bridge oil piping seals with gas cylinder (not shown in FIG.) and communicates, and the 3rd oil outlet end (8) of bridge oil piping is communicated with fuel tank (11) by total scavenger valve; It is characterized in that: the 3rd oil outlet end (8) of described bridge oil piping is connected in series pressure transmitter (10) with between total scavenger valve, and the first described-four pneumatic actuator (2,3,4,6), pressure transmitter (10) are electrically connected with PLC.
2. CNG hydraulic substation according to claim 1 prevents high pressure oil return apparatus, it is characterized in that: the beacon course of described pressure transmitter (10) is 0-40Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520215867.9U CN204704195U (en) | 2015-04-10 | 2015-04-10 | A kind of CNG hydraulic substation prevents high pressure oil return apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520215867.9U CN204704195U (en) | 2015-04-10 | 2015-04-10 | A kind of CNG hydraulic substation prevents high pressure oil return apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204704195U true CN204704195U (en) | 2015-10-14 |
Family
ID=54283818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520215867.9U Expired - Fee Related CN204704195U (en) | 2015-04-10 | 2015-04-10 | A kind of CNG hydraulic substation prevents high pressure oil return apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204704195U (en) |
-
2015
- 2015-04-10 CN CN201520215867.9U patent/CN204704195U/en not_active Expired - Fee Related
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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: 20151014 |