CN2092009U

CN2092009U - Throttle valve

Info

Publication number: CN2092009U
Application number: CN 91210457
Authority: CN
Inventors: 祁世宽
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-04-18
Filing date: 1991-04-18
Publication date: 1992-01-01

Abstract

The utility model relates to a pressure reducing valve. The structure of the pressure reducing valve is that the gap of a flow channel inside a valve seat is provided with a spherical valve core which is connected with a diaphragm and is provided with a connecting rod, the flow channel is also provided with a supporting spring for pushing the spherical valve core, and a valve cap is provided with a compressed air leading hole which is communicated with a diaphragm chamber. The pressure reducing valve makes the pressure of petroleum product continuously adjustable within the range of 0-0.4 MPa, and the flow quantity of the petroleum product continuously adjustable at 10-30 ml/minute. The operating condition change has less than 40% influence to flow quantity than setting flow quantity. Once the membrane is damaged, the spherical valve core drops inversely under the action of the resultant force of oil pressure, dead weight and a pushing spring, and thus the flow channel is closed, so that the pressure reducing valve has the function of protecting circuit be free from oil spill. Driven by compressed air, the utility model can automatically control an oil path.

Description

Throttle valve

The utility model provides a kind of reduction valve, comprise valve seat, valve body, fastening valve body valve gap, put diaphragm, spool in the valve chamber, and and the valve core link rod of diaphragm interlock.This reduction valve is particularly suitable as the reduction valve in the sample pretreatment system of the online quality instrument of vacuum distillation apparatus.Belong to the surveying in the physics.

Need the on-line analysis instrument that the various mass parameters of processing medium are monitored and controlled in the oil refining production technology, to adapt to the needs of High-efficient Production and safety operation.Most of in-line meters in the commercial Application all have certain requirement to the quality of survey medium, otherwise can have a strong impact on test mass, need measured article is carried out the pretreatment of aspects such as temperature, pressure for this reason.The Lanzhou oil refinery is produced the matched current stabilizer of a kind of online quality instrument.This current stabilizer adopts the cone spool, dispose corresponding taper runner gap, spool joins by connecting rod and the diaphragm that is arranged in the valve chamber, has the regulating lever of extrusion spring and adjustment extrusion spring pressure on the diaphragm, runner exit is provided with throttle orifice, and the spool lower end also is provided with the little spring orifice plate.By changing the position of spool and valve seat, change its fluid flow by taper runner gap.Spool is driven by diaphragm.The position of diaphragm is then determined jointly by the power that orifice plate back pressure, orifice plate outlet pressure, extrusion spring act in the diaphragm.The active force that screw rod can change extrusion spring is adjusted in rotation.Use this current stabilizer, can provide cleaning anhydrous oil sample to online quality instrument.And most of oil returns in the process pipelines and goes, and constantly the washing and filtering device prolongs its life cycle, can also shorten system lag time.Deficiency is that this valve oil-feed viscosity requires less than 15 centistokes, and accommodation is less.Incompatible decompression Rapid Cycle loop, face contact between spool and the valve seat runner gap, runner opens and closes underaction freely, in case there is impurity, then closes bad.Orifice plate is set, adjusts the flow inconvenience.

At the above-mentioned deficiency of prior art, the purpose of this utility model provides that a kind of Applicable temperature is higher, pressure is bigger, and sample introduction oil viscosity accommodation is wide, the reduction valve that life cycle is long.

The purpose of this utility model realizes by taking following technical measures.

Runner opening position in valve seat, configuration have the spherical valve core of the connecting rod that joins with diaphragm, and the supported spring of pushing tow spherical valve core also is set in the runner, and the pressurized air introduction hole that communicates with diaphragm chamber is set on the valve gap.

This reduction valve and cooler, filter constitute decompression oil product pretreatment system.This system is by drawing fuel tap and the Rapid Cycle loop joins, and the other end and online quality instrument join.This reduction valve working state is as follows: at first the pressurized air introduction hole by valve gap is carried to diaphragm chamber and is had the pressurized air of setting blast, makes it promote diaphragm, and drives valve rod spherical valve core and runner gap are disengaged, and reduction valve is in opening state.Online oil flows along connecting rod through spool and runner gap gap, and being turned back by diaphragm flows to delivery outlet.When oil pressure in the valve flowing channel was equal with diaphragm chamber's compressed air pressure, diaphragm was motionless, is in state of equilibrium.If oil pressure produces the disturbance greater than compressed air pressure, spherical valve core moves down, and cross section of fluid channel reduces, and the oil pressure on the effect diaphragm reduces thereupon, and diaphragm is got back to weighing apparatus position, Yuanping City very soon, and it is normal that oil product output pressure keeps substantially.When oil pressure produced a disturbance that reduces, diaphragm moved, and spherical valve core leaves the runner gap, and cross section of fluid channel increases, and output oil pressure increases, and passed diaphragm and oppositely moved, and set back and put, and it is normal that delivery pressure keeps substantially.In case when compressed air pressure was significantly less than the making a concerted effort of gravity of spool goring push spring and oil pressure, spool, spool was closed flow, and because the line contact, encapsulation is good.

In decompression oil product pretreatment system, use this reduction valve, can realize that oil product pressure is adjustable continuously in the 0-0.4MPa scope; The oil product flow is adjustable continuously in the 10-30 ml/min; Less than 40% of set flow, in case diaphragm damages, spherical valve core falls after rise under oil pressure, deadweight and goring push spring force action working conditions change to the influence of flow, and closed flow has protection circuit the oil spilling function does not take place; Owing to adopt compressed air-driven, can realize automatic control to oil circuit.

Accompanying drawing 1 is the structural representation of the utility model reduction valve, and accompanying drawing 2 is that reduction valve is located at the process flow diagram in the pretreatment system, reduction valve and each component mounting position in the accompanying drawing 3 expression pretreatment systems.

By most preferred embodiment, further describe technical characteristics of the present utility model below in conjunction with accompanying drawing.

Reduction valve comprises valve seat (9), valve body (12), fastens the valve gap (3) of valve body, puts diaphragm (4), spool (10) in the valve chamber, and and the valve core link rod (7) that links of diaphragm (4).Each part as the difference technical characteristics of this reduction valve, by following configuration, runner opening position in valve seat, configuration has the spherical valve core (10) of the connecting rod (7) that joins with diaphragm, the supported spring (11) of pushing tow spherical valve core (10) also is set in the runner, and valve gap (3) is gone up the pressurized air introduction hole (1) that communicates with diaphragm chamber (2) is set.

In the present embodiment,, the hard core clamping plate of diaphragm (5) are set in the joint of connecting rod and diaphragm.The wearing and tearing that these hard core clamping plate are produced in the time of not only can reducing the diaphragm repeated deformation have also increased the flexible of diaphragm simultaneously.In order to make the sample oil that flows out from the runner gap form bigger boundling oil pressure, guiding directed earial drainage ring (8) is set at the valve seat place that is close to the runner gap to diaphragm the valve chamber (6).

In the present embodiment, reduction valve is except that film sheet matter is fluorine rubber or fluorosioloxane rubber, and metalwork all can select for use stainless steel to make.If select convolution diaphragm for use, effect is better than flat diaphragm.

In the process flow diagram, (13), (14), (15), (20), (21), (22), (23) are valve, and (16) are reduction valve, (17) be thermometer, (18) are source of the gas, and (19) are filter, (24) be normal decompression survey line pump, (25) are cooling bath and spill pipe.

Claims

1, a kind of reduction valve, comprise the valve gap of valve seat, valve body, fastening valve body, diaphragm, the spool of storing valve chamber, and and the valve core link rod of diaphragm interlock, it is characterized by the runner opening position in valve seat, the spherical valve core that configuration has the connecting rod that joins with diaphragm, the supported spring of pushing tow spherical valve core also is set in the runner, the pressurized air introduction hole that communicates with diaphragm chamber is set on the valve gap.

2, a kind of reduction valve according to claim 1 is characterized by in the joint of connecting rod and diaphragm, and the hard core clamping plate of diaphragm (5) are set; Guiding directed earial drainage ring (8) is set at the valve seat place that is close to the runner gap.