CN2141004Y - Single-action two-way equalizing valve - Google Patents

Abstract

The utility model relates to a single-action two-way equalizing valve, comprising a valve body, a valve plug, a valve rod, a pressing cover, a compensating cushion ring, etc. The single-action two-way equalizing valve is in the structure of a single valve body and a conical valve plug; an inputting hole group and an outputting hole group are all on one valve body. The valve body is provided with a cavity for the conical valve plug; the valve plug is installed in the cavity for the valve plug. Due to that a positioning ring is matched with a cushion ring with a conical surface for positioning, mutually corresponding positions of two access holes and access holes for the valve plug on the valve body are efficiently ensured. A spacing post is arranged in the single-action two-way equalizing valve, and an indicating knob is arranged on the periphery of the single-action two-way equalizing valve. The utility model has the advantages of convenient operation, reliability and convenient processing. Each of the access holes is on one turning plane. An external interface of the single-action two-way equalizing valve can be matched with instruments of the same class both at home and abroad.

Description

Single-action two-way equalizing valve

The utility model is a kind of and the matching used single action bilateral of differential pressure transmitter equilibrium valve.

Now widely differential pressure transmitter, three valve groups and throttling arrangement three are combined together both at home and abroad, measure and automatic regulating system in, be used in flow, pressure, pressure reduction, negative pressure and the open containers of continuous measurement liquid or the interface location of liquid level, proportion, density and two kinds of liquids having different specific weights of the interior liquid of pressure-vessel etc.The typical case of its measuring system connects as shown in Figure 1.Positive valve among the figure, negative pressure valve and equilibrium valve are identical three stop valves.So-called three valve groups are meant that differential pressure transmitter must be used with these three stop valves so all these three stop valves made an integral body usually the while, are called three valve branch road valve groups, are called for short three valve groups.Have four on the valve body of three valve groups and connect and chew, 1. 2. 3. 4. be connected with four pipelines.The program that adopts three valve set systems to measure fluid flow is: a, original state, three stop valve Close Alls; Equilibrium valve and positive valve or negative pressure valve are opened in b, zero-bit adjustment; C, differential pressure transmitter put into operation, close equilibrium valve, open positive valve and negative pressure valve; D, measurement finish, and make system be returned to original state, i.e. three stop valve Close Alls.This shows, when fluid flow is measured in the supporting use of three valve groups and differential pressure transmitter, three valve groups need three kinds of operating modes, with the corresponding pipeline connection state of these three kinds of operating modes be: 1,4. 3. 2. 1. pipeline be not communicated with entirely, 4. or 2. 2,1. 3. 3. 4. be communicated with 3,1. and 3., 2. and 4. be communicated with respectively.Though three stop valves in the three valve groups are made an integral body, its operation is still mutually independently, so three valve group one valves still need three operation handwheels.Because the operation of three stop valves is mutually independently, thus can not be fully synchronously, and the synchronism that pipeline switches also just can't guarantee, and misoperation might occur.Chinese patent discloses the multiple way and multiple switching valve and the manual three valve group one ball valves that can replace three valve groups.More than two kinds of valves all adopt two valve bodies, spherical valve plug structure.Two valve body structure complexity, difficult processing, cost height; Because external pore size distribution is on two valve bodies, thereby the mounting hole dimensional accuracy is reduced.Valve plug is spherical, the various resistant materials of not only processing difficulties, and incompatibility select processing for use.

The utility model is the shortcoming and defect that overcomes existing structure, improves and has designed a kind of novel single action bilateral equilibrium valve.This valve is not only simple in structure, volume is little, processing, easy for installation, and has improved accuracy and reliability.Describe characteristics of the present utility model and principle in detail below in conjunction with accompanying drawing.

Single action bilateral equilibrium valve is made up of valve body (1), valve plug (5), valve rod (6), gland (8), shim (9) etc., and it is characterized in that: described valve body (1) is a valve body, and imports, exports two groups of Kong Jun on a valve body; Two inputs of left end connect the hole welding system, and two outputs of right-hand member connect the hole and connect differential pressure transmitter high and low pressure room, thereby have guaranteed reliability of operation.Valve plug of the present utility model (5) is taper, valve body has the cone-shaped valve plug chamber on (1), valve plug (5) is installed in the valve plug chamber, owing to there is positioning ring (3) to cooperate the location with taper faced washer (2), thereby has guaranteed the mutual corresponding position in two paths hole and valve plug port hole on the valve body effectively.Establish limited post (4) in the utility model, promptly limited post (4) is fixed on the bottom of gland (8), plays position-limiting action during by valve rod (6) rotation valve plug.Can correctly indicate the working position when making work, the utility model also is provided with indication knob (7).When installing, be furnished with a shim (9) again with instrument, can with the supporting use of other serial differential pressure transmitter both at home and abroad.The above structure is referring to Fig. 2.

Another feature of the present utility model is: each paths hole is on a plane of rotation, referring to Fig. 3.When valve plug is among the figure a position, by the valve plug port hole 2. 3. 1. pipeline reached and 4. be connected separately, this is the state that three valve groups put differential pressure transmitter into operation; When valve plug rotated 25 °, valve plug was in b position among the figure, and pipeline is 1. 2. 3. 4. obstructed entirely, and this is the original state of three valve groups; When the valve plug half-twist, valve plug is in c position among the figure, and 4. 3. 2. pipeline be connected, and this is the zeroing state of three valve groups.

Description of drawings:

Fig. 1 is to use the liquid flow measurement system schematic of differential pressure transmitter and three valve groups.

Fig. 2 is the utility model structural representation.

Fig. 3 is the utility model working state figure.

1, valve body

2, taper faced washer

3, positioning ring

4, limited post

5, valve plug

6, valve rod

7, indication knob

8, gland

9, shim

Claims (2)

1, a kind of single action bilateral equilibrium valve, form by valve body (1), valve plug (5), valve rod (6), gland (8), shim (9) etc., it is characterized in that: described valve body (1) is a valve body, and input, two groups of Kong Jun of output are on a valve body, valve gap (5) is taper, have positioning ring (3) to cooperate the location with taper faced washer (2), in establish limited post (4), peripheral hardware indication knob (7).

2, single action bilateral equilibrium valve according to claim 1, it is characterized in that: each paths hole is on a plane of rotation.

Images