CN2893187Y

CN2893187Y - LNG vehicle air cylinder combined decompression regulating valve

Info

Publication number: CN2893187Y
Application number: CNU2006200336047U
Authority: CN
Inventors: 陈绍荣; 孟健
Original assignee: Sichuan Air Separation Plant (group) Co Ltd
Current assignee: Sichuan Air Separation Plant (group) Co Ltd
Priority date: 2006-03-28
Filing date: 2006-03-28
Publication date: 2007-04-25
Anticipated expiration: 2016-03-28

Abstract

The utility model discloses a combined decompression regulation valve for gas bottle of LNG vehicle, wherein the low end of a spring (2) that is inside an up valve (1) is connected with a low block (6); the lower end of the low block (6) is fixed with a valve top (7) through a bolt; the valve top (7) is contacted with a valve seat (8) in the middle of a low valve (9); the lower end of the low valve (7) is connected with a valve (12) whose middle through hole is communicated with a through hole (a) inside the lower valve (9); the through hole in the middle of the valve (12) is provided with a valve core (10); the lower end of the valve core (10) seals an inlet (e) of the valve (12); the valve core (10) is sleeved with a spring (11) outside; the upper end of the spring (11) is limited by steps inside the valve hole; and the lower end of the spring (11) is connected with the valve core (10). The utility model has good practicality and saves energy resources.

Description

LNG vehicle gas cylinder combination reduction regulation valve

Technical field

The utility model relates to modulating valve, especially a kind of LNG vehicle gas cylinder combination reduction regulation valve.

Background technique

At present, the stop valve of in LNG vehicle gas cylinder flow process, using, flow-limiting valve, inlet check valve, vent stop valve, the two-stage pressure relief valve except discharge opeing, also has a very important valve, that is exactly the reduction regulation valve, but find in actual use, use this valve not reach the effect of expection separately, be higher than the setting pressure of valve when the valve internal pressure after, this valve open, but a large amount of saturated vapors also fail to flow to drain line along this valve export, are mainly reflected on the frosting degree of the rate of descent of tank body pressure and this valve.By analysis, though this valve is opened, but the inlet outlet pressure differential of valve is very little, make that flowing of medium is extremely slow, almost do not have in the gas flow drain line, therefore the pressure rate of descent of tank body is slow, and because of having only a small amount of low-temperature steam by this valve, the frosting of this valve is also therefore not obvious again.To this, propose to provide the pressure drop of a 0.015MPa on the flow process for the outlet of this valve, make this dropping valve really reach the effect of " economy ".Therefore we have designed the combination brake switch and proporting that a kind of reduction regulation valve also can provide the 0.015MPa pressure drop for this reason.

Summary of the invention

The purpose of this utility model provides a kind of practicability height, saves the LNG vehicle gas cylinder combination reduction regulation valve of the energy.

In order to achieve the above object, the utility model adopts following technological scheme: a kind of LNG vehicle gas cylinder is with making up the reduction regulation valve, spring upper end in the upper valve body is connected on the block, last block is spacing by the bolt that stretches in the upper valve body, the lower end of spring is connected with down block, there is the valve top lower end of following block by bolt, between valve top and following block, diaphragm is arranged, the valve top contacts with the valve seat at following valve body middle part, the through hole of valve seat lower end communicates with the entrance and exit of diaphragm chamber and following valve body side, be connected with valve body in the following lower end of valve body, this valve body middle part through hole communicates with through hole in the following valve body, is provided with spool in the through hole in the middle part of the valve body, the inlet of spool lower end sealed valve body, spool is with spring outward, and the upper end of spring is spacing by the step in the valve body hole, and the lower end of spring is connected on the spool.

The utility model is connected with valve body (threeway safety check) composition combination reduction regulation valve in the lower end of the reduction regulation valve that upper valve body and following valve body constitute, this reduction regulation valve inlet connects gas-phase space in the valve, outlet converges with the liquid discharging valve outlet, when the valve of reduction regulation valve top and valve seat sealed, the spool of threeway safety check left the inlet of threeway safety check; When the valve of reduction regulation valve top and valve seat are opened, the inlet of the spool sealing threeway safety check of threeway safety check, by calculating the power of valve top and spring, make this threeway safety check for the outlet of reduction regulation valve provides the pressure drop of a 0.015MPa, make this dropping valve really reach the effect of " economy ".This combination reduction regulation valve is when the valve internal pressure is higher than its setting value, and valve open to drain line, makes the valve internal pressure reduce to the working pressure of setting as early as possible the row of the saturated vapor in the valve; Reduce to the setting value of this valve when the valve internal pressure after, valve is closed again.Because what this valve discharged is saturated vapor, can avoid because valve internal pressure fast rise causes safety valve to open jumping, and its medium that emits enters motor along drain line, the medium energy is waste not, therefore this valve claims economic valve again, the problem that it has really reached advantages of high practicability and has avoided energy dissipation.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

A kind of LNG vehicle gas cylinder of the utility model is with the structure of combination reduction regulation valve as shown in Figure 1: mainly be made of reduction regulation valve and threeway safety check, reduction regulation valve 13 is mainly by upper valve body 1, spring 2, bolt 3, diaphragm 4, last block 5, following block 6, valve top 7, valve seat 8, following valve body 9 constitutes, threeway safety check 14 is mainly by spool 10, spring 11, valve body 12 constitutes, wherein spring 2 upper ends in the upper valve body 1 are connected on the block 5, last block 5 is spacing by the bolt 3 that stretches in the upper valve body, the lower end of spring 2 is connected with down block 6, there is valve top 7 lower end of following block 6 by bolt, between valve top 7 and following block 6, diaphragm 4 is arranged, valve top 7 contacts with the valve seat 8 at following valve body 9 middle parts, the through hole a of valve seat 8 lower ends is with diaphragm chamber d and the inlet b and the outlet c of valve body side communicate down, lower end at following valve body 9 is connected with valve body 12, these valve body 12 middle part through holes communicate with through hole a in the following valve body 9, be provided with spool 10 in the valve body 12 middle part through holes, the inlet e of spool 10 lower end sealed valve bodies 12, the spool 10 outer springs 11 that are with, the upper end of spring 11 is spacing by the step in the valve body hole, and the lower end of spring 11 is connected on the spool 10.

The main body of the utility model combination reduction regulation valve is a reduction regulation valve, its working principle is: medium enters diaphragm chamber d from inlet b, and act on the diaphragm 4, diaphragm 4 tops are pressure springs 2, this spring 2 provides one to open pressure with valve setpoint and act on the precompression that the power on the diaphragm balances each other, and when pressure medium was lower than setting pressure, spring force was higher than medium and acts on power on the diaphragm 4,

valve top

7 and 8 valve seats are in closed state, valve closing; After pressure medium is higher than setting pressure, medium acts on power on the diaphragm 4 greater than the precompression of spring 2, diaphragm 4 is upwards motion in its amount of deflection scope, drive valve top 7 upwards, valve top 7 is destroyed with the sealing pair that valve seat 8 forms, valve open, medium flows to outlet c along valve seat 8, and the valve internal pressure is reduced; After the valve internal pressure is reduced to setting pressure, diaphragm 4 will move downward under the effect of spring force, make valve top 7 form sealing, valve closing again with valve seat 8.For providing flow process required pressure drop, we are provided with a threeway safety check in the outlet port of dropping valve, the inlet e of this valve is near sealing surface, and valve seat 8 is directly processing on the valve body 9 down, the reposition force on valve top 7 provides by spring force, and (through hole a) near outlet for inlet e.The inlet e of threeway safety check connects liquid line, outlet platoon liquid pipeline, and inlet e meets the outlet c of dropping valve.Therefore, between the inlet of dropping valve and threeway safety check inlet because the effect of valve top 7 and spring 2, by calculating the power of valve top 7 and spring 2, make this threeway safety check that a pressure drop that flow process is required is provided, finally make this combined valve reach the effect of " economic valve ".

This combined valve shows that through the application on the LNG vehicle gas cylinder its design principle and actual effect are all very satisfied.

Claims

1, a kind of LNG vehicle gas cylinder is with making up the reduction regulation valve, spring (2) upper end in the upper valve body (1) is connected on the block (5), last block (5) is spacing by the bolt (3) that stretches in the upper valve body, the lower end of spring (2) is connected with down block (6), there is valve top (7) lower end of following block (6) by bolt, between valve top (7) and following block (6), diaphragm (4) is arranged, valve top (7) contacts with the valve seat (8) at following valve body (9) middle part, the through hole (a) of valve seat (8) lower end is with diaphragm chamber (d) and the inlet (b) and the outlet (c) of valve body side communicate down, it is characterized in that: the lower end at following valve body (9) is connected with valve body (12), this valve body (12) middle part through hole communicates with through hole (a) in the following valve body (9), be provided with spool (10) in the through hole of valve body (12) middle part, the inlet (e) of spool (10) lower end sealed valve body (12), the outer spring (11) that is with of spool (10), the upper end of spring (11) is spacing by the step in the valve body hole, and the lower end of spring (11) is connected on the spool (10).