CN206439620U - A kind of automatic nitrogen charger for LNG cold immersed pump - Google Patents
A kind of automatic nitrogen charger for LNG cold immersed pump Download PDFInfo
- Publication number
- CN206439620U CN206439620U CN201621209742.6U CN201621209742U CN206439620U CN 206439620 U CN206439620 U CN 206439620U CN 201621209742 U CN201621209742 U CN 201621209742U CN 206439620 U CN206439620 U CN 206439620U
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- valve
- pressure
- pipeline
- current limliting
- connects
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Abstract
The utility model provides a kind of automatic nitrogen charger for LNG cold immersed pump, including：Ball valve passes through pipeline communication Self-operated pressure reducing valve; Self-operated pressure reducing valve is respectively communicated with current limliting choke valve and needle-valve; current limliting choke valve connects two-position three-way valve with needle-valve; two-position three-way valve connects check valve; check valve passes through flange communication cable protection pipe; pressure transmitter, pressure transmitter signal connection DCS, DCS connection two-position three-way valves are provided with pipeline between flange and cable protection pipe；Pressure measuring valve is provided with pipeline between current limliting choke valve and two-position three-way valve; pipeline between current limliting choke valve and two-position three-way valve also connects two-position three-way valve; two-position three-way valve passes through check valve; check valve connects instrument protection pipe by flange; pressure transmitter is arranged on the pipeline between flange and instrument protection pipe; pressure transmitter connects DCS, DCS connection two-position three-way valves.To realize nitrogen charging automatic, lasting, stably, safe.
Description
Technical field
The utility model is related to technical field of chemical, more particularly to a kind of for LNG cold immersed pump
Automatic nitrogen charger.
Background technology
LNG cold immersed pump is process equipment important in liquefied natural gas (LNG) plant and receiving station, and its cable is protected
Protecting pipe and instrument protection sleeve pipe are required to nitrogen charging, and maintain certain pressure.If insufficient pressure, it can not ensure to protect cable
The sealing of protecting pipe and instrument protection sleeve pipe, inflammable and explosive natural gas may scurry into cable and instrument system, cause great life
Production accident.If pressure superelevation, sealing may be damaged or sealing has been failed, natural gas leaking to cable protecting sleeve and instrument
Table sleeve pipe.This automatic nitrogen-charging protection device can effectively control nitrogen charging pressure, to cable protecting sleeve and instrument protection sleeve pipe
Automatic pressurising, while also gas in nitrogen and cable protecting sleeve, instrument protection sleeve pipe can be isolated well after the completion of pressurising
Body, it is to avoid gas mutually alters influence.In the prior art, casing pressure is difficult to maintain, it is often necessary to manually fill inert nitrogen gas；
Artificial note nitrogen, there are the following problems：
Work is heavy, takes longer；Separate unit low temperature immersed pump notes nitrogen, 2 more than hour；Need to carry out many infusion nitrogen
When, operator is difficult to tackle；
Pressure is not easily controlled；If it is too high that nitrogen pressure fills, sealing can be damaged, and the equipment that is currently running can be caused
Jump car, influence production；Pressure is too low, does not reach sealing effectiveness, and note nitrogen frequency can be caused too high；
Frequently dismount connector, it is easy to moisture (moisture in air) is brought into nitrogen envelope system, and causes vibration probe
Failure.Such as certain company Duo Tai low temperature immersed pump enters instrument signal cable protecting sleeve due to moisture, causes meter probe to lose
Effect.
Utility model content
The utility model provide a kind of automatic nitrogen charger for LNG cold immersed pump, with realize automatically,
Nitrogen charging lasting, stably, safe.
To achieve these goals, the utility model provides following technical scheme：
A kind of automatic nitrogen charger for LNG cold immersed pump, it includes：Ball valve 35, two-bit triplet electromagnetism
Valve, Self-operated pressure reducing valve 37, current limliting choke valve 38 and pressure transmitter, wherein：One end of the ball valve 35 passes through pipeline communication
One end of Self-operated pressure reducing valve 37, the other end of the Self-operated pressure reducing valve 37 is respectively communicated with one end and the pin of current limliting choke valve 38
One end of valve 40, the other end of the current limliting choke valve 38 and the other end of needle-valve 40 are by same pipeline communication the first two
The entrance point of triple valve 57, the port of export of first two-position three-way valve 57 connects the import of the first check valve 50, described first
The outlet of check valve 50 is by the communication cable protection pipe of first flange 12, between the first flange 12 and the cable protection pipe
Pipeline on be provided with first pressure transmitter 58, the signal of first pressure transmitter 58 connects the first DCS 54, described the
The adjustable side of one DCS54 connections first two-position three-way valve 57；
Pressure measuring valve 43 is provided with pipeline between the current limliting choke valve 38 and first two-position three-way valve 57, it is described
Pressure gauge 41 is provided with pressure measuring valve 43, the pipeline between the current limliting choke valve 38 and first two-position three-way valve 57 also connects
The entrance point of logical second two-position three-way valve 59, the port of export the entering by the second check valve 52 of second two-position three-way valve 59
Mouthful, the outlet of second check valve 52 connects instrument protection pipe by second flange 13, and the second pressure transmitter 56 is set
Put on the pipeline between the second flange 13 and instrument protection pipe, the signal of second pressure transmitter 56 connection second
DCS55, the adjustable side of the 2nd DCS55 connections second two-position three-way valve 59.
Preferably, connected between the pressure measuring valve 43 and the pressure gauge 41 by double card set 42.
Preferably, the other end of the ball valve 35 connects the 3rd flange 3 by pipeline.
Preferably, set on the pipeline between the other end of the Self-operated pressure reducing valve 37 and one end of current limliting choke valve 38
There is the first threeway, one end of the other end of the Self-operated pressure reducing valve 37, one end of current limliting choke valve 38 and needle-valve 40 connects respectively
It is connected on three interfaces of first threeway.
Preferably, the other end of current limliting choke valve 38 on the pipeline of the pressure measuring valve 43 with being provided with the second threeway 39, institute
The other end for stating the other end, the pressure measuring valve 43 and needle-valve 40 of current limliting choke valve 38 connects the three of second threeway 39 respectively
Individual interface.
Preferably, the 3rd threeway is provided with the pipeline between the pressure measuring valve 43 and first two-position three-way valve 57,
The entrance point of the pressure measuring valve 43, the entrance point of first two-position three-way valve 57 and the second two-position three-way valve 57 connects respectively
Connect three interfaces of the 3rd threeway.
By implementing above technical scheme, with following technique effect：What the utility model was provided is used for liquefied natural gas
The automatic nitrogen charger of low temperature immersed pump, realizes continuous automatic nitrogen-charging problem, and keeps nitrogen pressure stable, mitigates operator's
Workload；Avoid frequently dismounting connector, prevent moisture from entering nitrogen and sealing system；Ensure against the boil-off gas (natural gas) in pump barrel
By leaking into nitrogen pressure maintaining pipe at instrument signal line or power supply linear sealing, the Self-operated pressure reducing valve and check-valves used, under
, will not releasing pressure automatically in the case of swimming pressure height.
Brief description of the drawings
The structural representation for the device that Fig. 1 provides for the utility model.
Embodiment
In order to be better understood from the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and provides
Embodiment.
The utility model embodiment provides a kind of automatic nitrogen charger for LNG cold immersed pump, such as Fig. 1
It is shown, including：Ball valve 35, two-bit triplet magnetic valve, Self-operated pressure reducing valve 37, current limliting choke valve 38 and pressure transmitter, wherein：
One end of the ball valve 35 passes through one end of pipeline communication Self-operated pressure reducing valve 37, the other end point of the Self-operated pressure reducing valve 37
Not Lian Tong current limliting choke valve 38 one end and one end of needle-valve 40, the other end of the current limliting choke valve 38 and needle-valve 40 it is another
End is connected by the entrance point A of same the first two-position three-way valve of pipeline communication 57, the port of export C of first two-position three-way valve 57
The import of logical first check valve 50, the outlet of first check valve 50 is described by the communication cable protection pipe of first flange 12
First pressure transmitter 58, the first pressure pick-up are provided with pipeline between first flange 12 and the cable protection pipe
The signal of device 58 connects the first DCS54, and the first DCS (Distributed Control System) 54 connects the tune of first two-position three-way valve 57
End B is saved, to be controlled according to the signal of first pressure transmitter 58 by the first DCS and adjust first two-position three-way valve 57.
Pressure measuring valve 43 is provided with pipeline between the current limliting choke valve 38 and first two-position three-way valve 57, it is described
Pressure gauge 41 is provided with pressure measuring valve 43, the pipeline between the current limliting choke valve 38 and first two-position three-way valve 57 also connects
The entrance point A of logical second two-position three-way valve 59, port of export C the entering by the second check valve 52 of second two-position three-way valve 59
Mouthful, the outlet of second check valve 52 connects instrument protection pipe by second flange 13, and the second pressure transmitter 56 is set
Put on the pipeline between the second flange 13 and instrument protection pipe, the signal of second pressure transmitter 56 connection second
DCS55, the adjustable side B of the 2nd DCS55 connections second two-position three-way valve 59, to be believed according to second pressure transmitter 56
Number and second two-position three-way valve 59 is controlled to adjust by the 2nd DCS.
The device that the utility model embodiment is provided, realizes continuous automatic nitrogen-charging problem, and keeps nitrogen pressure stable, subtracts
The workload of light work person；Avoid frequently dismounting connector, prevent moisture from entering nitrogen and sealing system；Ensure the boil-off gas in pump barrel
Natural gas at instrument signal line or power supply linear sealing by leaking under the operating mode of nitrogen pressure maintaining pipe, the operated pressure-reducing used
Valve, will not releasing pressure automatically in the case where downstream pressure is high.
In other embodiments, on the basis of above-described embodiment, further, the pressure measuring valve 43 and the pressure gauge 41
Between connected by double card set 42, with firm the connection pressure measuring valve and the pressure gauge.
In the various embodiments described above, more specifically, the other end of the ball valve 35 connects the 3rd flange 3 by pipeline 1.
To connect tracheae by the 3rd flange 3.
In the various embodiments described above, more specifically, the other end and the current limliting choke valve 38 of the Self-operated pressure reducing valve 37
One end between pipeline on be provided with the first threeway, the other end of the Self-operated pressure reducing valve 37 and the one of current limliting choke valve 38
End and one end of needle-valve 40 are connected on three interfaces of first threeway.Subtracted with preferably circulating and connecting self-operated type
Pressure valve 37, current limliting choke valve 38 and needle-valve 40.
In the various embodiments described above, more specifically, the pipeline of the other end of current limliting choke valve 38 and the pressure measuring valve 43
On be provided with the second threeway 39, the other end difference of the other end of the current limliting choke valve 38, the pressure measuring valve 43 and needle-valve 40
Connect three interfaces of second threeway 39.
In the various embodiments described above, more specifically, between the pressure measuring valve 43 and first two-position three-way valve 57
It is provided with the 3rd threeway on pipeline, the pressure measuring valve 43, the entrance point of first two-position three-way valve 57 and the second two
The entrance point of triple valve 57 connects three interfaces of the 3rd threeway respectively.
A kind of automatic nitrogen-charging for LNG cold immersed pump provided above the utility model embodiment
Device is described in detail, for those of ordinary skill in the art, according to the thought of the utility model embodiment, specific
It will change in embodiment and application, in summary, this specification content should not be construed as new to this practicality
The limitation of type.
Claims (6)
1. a kind of automatic nitrogen charger for LNG cold immersed pump, it is characterised in that including：Ball valve (35), two
Position-3-way solenoid valve, Self-operated pressure reducing valve (37), current limliting choke valve (38) and pressure transmitter, wherein：The ball valve (35)
One end is respectively communicated with limit by one end of pipeline communication Self-operated pressure reducing valve (37), the other end of the Self-operated pressure reducing valve (37)
One end of flow throttle valve (38) and one end of needle-valve (40), the other end of the current limliting choke valve (38) and needle-valve (40) it is another
End passes through the entrance point of the same two-position three-way valve of pipeline communication first (57), the port of export of first two-position three-way valve (57)
The import of the first check valve (50) is connected, the outlet of first check valve (50) is protected by first flange (12) communication cable
First pressure transmitter (58) is provided with pipe, the pipeline between the first flange (12) and the cable protection pipe, it is described
First pressure transmitter (58) signal connects the first DCS (54), and the first DCS (54) connects first two-position three-way valve
(57) adjustable side；
Pressure measuring valve (43), institute are provided with pipeline between the current limliting choke valve (38) and first two-position three-way valve (57)
State and pressure gauge (41) is provided with pressure measuring valve (43), between the current limliting choke valve (38) and first two-position three-way valve (57)
Pipeline also connect the entrance points of the second two-position three-way valve (59), the port of export of second two-position three-way valve (59) passes through second
The import of check valve (52), the outlet of second check valve (52) connects instrument protection pipe, second by second flange (13)
Pressure transmitter (56) is arranged on the pipeline between the second flange (13) and instrument protection pipe, the second pressure pick-up
Device (56) signal connects the 2nd DCS (55), and the 2nd DCS (55) connects the adjustable side of second two-position three-way valve (59).
2. it is used for the automatic nitrogen charger of LNG cold immersed pump as claimed in claim 1, it is characterised in that described to take
It is connected between pressure valve (43) and the pressure gauge (41) by double card set (42).
3. it is used for the automatic nitrogen charger of LNG cold immersed pump as claimed in claim 1, it is characterised in that the ball
The other end of valve (35) connects the 3rd flange (3) by pipeline.
4. as claimed in claim 1 be used for LNG cold immersed pump automatic nitrogen charger, it is characterised in that it is described from
Be provided with the first threeway on pipeline between the other end of power formula pressure-reducing valve (37) and one end of current limliting choke valve (38), it is described from
One end of the other end of power formula pressure-reducing valve (37), one end of current limliting choke valve (38) and needle-valve (40) is connected to described first
On three interfaces of threeway.
5. it is used for the automatic nitrogen charger of LNG cold immersed pump as claimed in claim 1, it is characterised in that current limliting section
The other end of stream valve (38) on the pipeline of the pressure measuring valve (43) with being provided with the second threeway (39), the current limliting choke valve (38)
The other end, the other end of the pressure measuring valve (43) and needle-valve (40) connect three interfaces of second threeway (39) respectively.
6. it is used for the automatic nitrogen charger of LNG cold immersed pump as claimed in claim 5, it is characterised in that described to take
The 3rd threeway, the pressure measuring valve (43), institute are provided with pipeline between pressure valve (43) and first two-position three-way valve (57)
The entrance point of the entrance point and the second two-position three-way valve (57) of stating the first two-position three-way valve (57) connects the 3rd threeway respectively
Three interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621209742.6U CN206439620U (en) | 2016-11-08 | 2016-11-08 | A kind of automatic nitrogen charger for LNG cold immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621209742.6U CN206439620U (en) | 2016-11-08 | 2016-11-08 | A kind of automatic nitrogen charger for LNG cold immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206439620U true CN206439620U (en) | 2017-08-25 |
Family
ID=59645710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621209742.6U Expired - Fee Related CN206439620U (en) | 2016-11-08 | 2016-11-08 | A kind of automatic nitrogen charger for LNG cold immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206439620U (en) |
-
2016
- 2016-11-08 CN CN201621209742.6U patent/CN206439620U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170825 Termination date: 20181108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |