CN201027992Y

CN201027992Y - Quick switch-off meter valve

Info

Publication number: CN201027992Y
Application number: CNU2007200114826U
Authority: CN
Inventors: 江立军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-04
Filing date: 2007-04-04
Publication date: 2008-02-27
Anticipated expiration: 2017-04-04

Abstract

The utility model belongs to a pipeline accessory in instrument control pipeline, and in particular relates to a fast shut-off instrument valve, which is characterized in that: a valve body of the utility model adopts a right angle type valve body; one interface of the right angle type valve body is an instrument displaying element interface, and the other interface of the right angle type valve body is a detected pipeline interface end; a valve cover is arranged inside the other end of the valve body which is directly communicated with the detected pipeline interface end; a valve rod is in threaded connection with the valve cover; one end of the valve rod is connected with a handwheel, and the other end of the valve rod can be led to pass through a valve port and push a valve core to move inside a valve cavity by rotating the handwheel; an internal valve body is arranged inside the detected pipeline interface; one end of the internal valve body stretches out of the valve body to be connected with a detected pipeline, and the other end of the internal valve body can be in contact with one side of the valve core; the other side of the valve core can be hermetically connected with the end face of the valve port. The utility model is reasonable in design, fast to shut off and good in leak tightness, can automatically eliminate impurities and dirt on the seal surface of the valve port, and has the advantages of safe operation, very convenient use, etc.

Description

The fast shut-off Gauge Valves

Technical field

The utility model belongs to the pipeline fittings in the instrument pilot line, particularly a kind of fast shut-off Gauge Valves.

Background technique

At present, be used for chemical industry, in the instrument pilot line of industries such as thermoelectricity and marine ships transportation, by traditional connecting means, general front at the instrument display element, the throughway valve of a manual cut-out usefulness is installed, it is by valve body, measured tube line interface on the valve body and instrument display element interface, valve gap, valve rod, handwheel, spool is formed, it adopts the straight-through type valve body, the interface of one end of its straight-through type valve body is the measured tube line interface, it can join with tested pipeline, the scsi sid display element interface of the other end of straight-through type valve body connects instrument display element---pressure gauge in instrument display element interface.This structure, when the field instrument display element is breaking down and damages under the situation of leakage, what lean on is that operator's manual-lock throughway valve is handled leakage point, carries out subsequent operations such as instrument maintenance and replacing again.The shortcoming of this structure is: 1, the site operation personnel can not find this accident in the very first time.2, when in the on-the-spot pipeline being the medium of high pressure, high temperature and poisonous and harmful character, the operator may be not close, and more impossible armrest moves closes throughway valve.This result to the continous-stable operation of producing is and is disadvantageous.Blast or the toxic and harmful leakage in case more serious consequence is the scene, will constitute threat greatly personal safety.

Summary of the invention

The utility model is intended to the shortcoming and defect part that exists in above-mentioned technology, and provide not only reasonable in design, can fast shut-off, good airproof performance again, and can remove on the valve port sealing surface impurity, dirt automatically and have handling safety, use a kind of very easily right-angle type fast shut-off Gauge Valves.

The purpose of this utility model is to adopt following technological scheme to realize: the fast shut-off Gauge Valves, comprise valve body, measured tube line interface on the valve body and instrument display element interface, valve gap, valve rod, handwheel, spool, be characterised in that: its valve body adopts the right-angle type valve body, one interface of right-angle type valve body is an instrument display element interface, another interface of right-angle type valve body is a measured tube line interface end, with adorn valve gap in the valve body of the straight-through mutually the other end of measured tube line interface end, connect valve rod at the valve gap internal thread, its valve rod one end connects handwheel, and rotation hand wheel can make the other end of valve rod pass valve port promotion spool and move in valve pocket; Adorn inner valve body in the measured tube line interface, an end of inner valve body is stretched outside valve body join with tested pipeline, the other end of inner valve body can touch mutually with the one side of spool, and the another side of spool can be connected with the valve port end face seal.

Described spool is made by stainless steel, and the sealing surface weld deposit cemented carbide makes its surface hardness HRC 〉=more than 45.

Described spool is furnished with four road angles in the angle that is evenly equipped with on its circumferential surface more than three roads, and the angle of the longitudinal axis of each angle and spool is 8～12 °.

Described spool, corresponding with shape, the size of valve rod head in being in the right angle valve body, the processing shrinkage pool that can match in the spool face with the valve rod head.

Because the spool in the utility model is the part of a key, its manufactured materials can be selected to select for use according to the corrosion situation of pressure, temperature and medium, usually adopt stainless steel materials such as 304 or 316 to make, and on its sealing surface pile-up welding hard alloy, make its surface hardness HRC 〉=more than 45.Because at the angle that is laid with on the circumferential surface of spool more than three roads, when instrument display element proper functioning, its spool resultant radial force approaches zero, so that keep the spool balance, avoids the interference of high frequency oscillation.And guarantee that simultaneously material has enough intensity.

The benefit of this structure is: when its when closing the path of instrument display element, produce the rotation of certain speed.Because the impurity and the dirt that have in the middle of the medium, the time one is long, may be deposited on interior guide surface of valve body and the sealing surface, and this of spool rotatablely moves, and impurity and dirt removal can be fallen, and the hermetic unit that plays spool and valve body carries out self-cleaning effect.Thereby can guarantee that instrument shows the featuring rigid cutting-off of path when breaking down.

The utility model is a self-contained unit that integrates hand off valve and instrument display element, the great advantage of this structure is that the instrument display element breaks down when damaging leakage at the scene, it can close the path of instrument display element automatically in the very first time, guarantee that medium can not leak outside in the pipeline, after treating that field service personnel is overhauled or changed the fault that is taken place, and after guaranteeing all runnings and showing that measurement is normal, open the manually operated valve part again, instrument display element path is reopened, can recover the instrument function of use.

Operation of the present utility model, principle are described below: after leaking appears in the instrument display element, this moment, instrument display element place only had atmospheric pressure, therefore it is to utilize self pressure of tested pipeline and the difference between the barometric pressure to act on thrust on the spool cross section, promotes spool and cuts off instrument display element path.During the instrument proper functioning, manually operated valve part complete opening, handwheel rotates to maximum position---fully open position, valve rod and spool are broken away from, instrument display element path is opened, and medium shows that by spool balance channel and instrument passage enters the instrument display element, and measured data will normally be shown by the instrument display element, in case after pressure medium arrived the instrument display element by the spool balance channel, then the position of spool can not change again.When the instrument display element breaks down and damage leakage,, guarantee proceeding of production because the effect of tested pipeline self pressure and atm difference makes spool close in moment.The maintainer overhauls normally or changes the instrument display element, after the test handwheel is rotated down, and makes valve rod push spool open, opens instrument display element path, when the work of instrument display element all normal after, again handwheel is rotated back to original position and gets final product.

Combine the above technical measures of being taked, realize the purpose of this utility model.

Compared with prior art, the utility model is not only reasonable in design, can fast shut-off, and good airproof performance again, and can remove on the valve port sealing surface impurity, dirt automatically and have handling safety, use advantages such as very convenient.

Description of drawings

The utility model has four width of cloth accompanying drawings.Wherein:

Accompanying drawing 1 is a specific embodiment of the utility model, and wherein the instrument display element is in the schematic representation of normal working;

Accompanying drawing 2 is specific embodiment of the utility model, when wherein the instrument display element is in leak condition, and the schematic representation that its spool is closed;

Accompanying drawing 3 is along the amplification view of A-A line among Fig. 1;

Accompanying drawing 4 is that the B of Fig. 3 is to figure.

Among the figure: 1, measured tube line interface, 2, inner valve body, 3, spool, 4, the right-angle type valve body, 5, instrument display element interface, 6, valve gap, 7, valve rod, 8, handwheel, 9, shrinkage pool, 10, angle.

Embodiment

Be specific embodiment of the utility model shown in Fig. 1,2,3,4, it is the fast shut-off Gauge Valves that is contained in the production chemical product instrument pilot line; Comprise measured tube line interface 1 on valve body, the valve body and instrument display element interface 5, valve gap 6, valve rod 7, handwheel 8, spool, be characterised in that: its valve body adopts right-angle type valve body 4, the right interface of right-angle type valve body 4 is measured tube line interface 1 end, another interface of right-angle type valve body 4 is an instrument display element interface 5, with dress valve gaps 6 in the right-angle type valve body 4 of the straight-through mutually left end of measured tube line interface 1 end, connect valve rod 7 at valve gap 6 internal threads, its valve rod 7 one ends connect handwheel 8, and rotation hand wheel 8 can make the other end of valve rod 7 pass valve port promotion spool 3 and move in valve pocket; Dress inner valve body 2 in measured tube line interface 1 makes an end of inner valve body 2 stretch valve body outside and tested pipeline joins, and the other end of inner valve body 2 can touch mutually with the one side of spool 3, and the another side of spool 3 can be connected with the valve port end face seal; Described spool adopts No. 304 stainless steel to make, its sealing surface weld deposit cemented carbide, and making its surface hardness is HRC50; On its circumferential surface, be furnished with four road angles 10, the angular distance of two adjacent angles 10 is 90 degree, each angle 10 is 10 ° with the angle of the longitudinal axis of spool 3, the shrinkage pool corresponding with shape, the size of valve rod 7 heads in being in right-angle type valve body 4, that processing can match with valve rod 7 heads in 3 of spools.

The above; it only is preferable embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; all are familiar with those skilled in the art in the disclosed technical scope of the utility model, are equal to replace or change according to the technical solution of the utility model and design of the present invention thereof all should be encompassed within the protection domain of the present utility model.

Claims

1. fast shut-off Gauge Valves, comprise valve body, measured tube line interface (1) on the valve body and instrument display element interface (5), valve gap (6), valve rod (7), handwheel (8), spool, be characterised in that: its valve body adopts right-angle type valve body (4), one interface of right-angle type valve body (4) is an instrument display element interface (5), another interface of right-angle type valve body (4) is measured tube line interface (a 1) end, with measured tube line interface (1) end dress valve gap (6) in the valve body of the straight-through the other end mutually, connect valve rod (7) at valve gap (6) internal thread, its valve rod (7) one ends connect handwheel (8), and rotation hand wheel (8) can make the other end of valve rod (7) pass valve port promotion spool (3) and move in valve pocket; Dress inner valve body (2) in measured tube line interface (1) makes an end of inner valve body (2) stretch valve body outside and tested pipeline joins, and the other end of inner valve body (2) can touch mutually with the one side of spool (3), and the another side of spool (3) can be connected with the valve port end face seal.

2. by the described fast shut-off Gauge Valves of claim 1, it is characterized in that: described spool (3) is made by stainless steel, and its sealing surface weld deposit cemented carbide makes its surface hardness HRC 〉=more than 45.

3. by the described fast shut-off Gauge Valves of claim 1, it is characterized in that: described spool (3), in the angle (10) that is evenly equipped with on its circumferential surface more than three roads, each angle (10) is 8～12 ° with the angle of the longitudinal axis of spool (3).

4. by the described fast shut-off Gauge Valves of claim 1, it is characterized in that: described spool (3), shape, the size of valve rod (7) head interior with being in right-angle type valve body (4) are corresponding, the shrinkage pool (9) that processing can match with valve rod (7) head in spool (3) face.