CN203146848U

CN203146848U - Balance type multifunctional regulating valve

Info

Publication number: CN203146848U
Application number: CN 201320018434
Authority: CN
Inventors: 井立军; 吴颖; 郑书飞; 桂斌
Original assignee: HANGZHOU MEIYA GENERATING EQUIPMENTS CO Ltd
Current assignee: HANGZHOU MEIYA GENERATING EQUIPMENTS CO Ltd
Priority date: 2013-01-15
Filing date: 2013-01-15
Publication date: 2013-08-21
Anticipated expiration: 2023-01-15

Abstract

The utility model discloses a balance type multifunctional regulating valve. The balance type multifunctional regulating valve is characterized in that a valve stem, an auxiliary valve clack and a balance valve spool are combined and connected with one another and then are placed in an integral cover, the integral cover is placed in a valve body after being provided with sealing gaskets, and a fixing valve cover is arranged on the valve body. The balance type multifunctional regulating valve has the advantages that the auxiliary valve clack is opened by low operating force at first when the valve stem moves upwards, media are sequentially fed into the cover and the auxiliary valve clack, a flow of the media is regulated, the balance valve spool is immediately opened, the flow of the media is regulated again, the pressure of temperature reduction water can be controlled under high differential pressure, the operating force is low, a double-sealing structure of a traditional cage type regulating valve is changed by the integral cover, the valve in a single-sealing structure can be sealed conveniently, leakage points are reduced, and a flow regulating procedure is controlled in the cover; and noise is effectively reduced, a phenomenon of vibratory scouring is prevented, and the service life of the valve is prolonged.

Description

A kind of balanced type multifunctional regulating valve

[technical field]

The utility model relates to a kind of balanced type multifunctional regulating valve, is used for the on-site terminal equipment that the procedure parameters such as the flow to medium, pressure, temperature of industrial process automation system carry out synchronization regulation and control, belongs to the automatic control technology field.

[background technique]

At present, known modulating valve structure is valve body, valve gap, valve seat, flap, composition such as shrouds.Form expenditure and pressure by changing the flap stroke with valve seat orifice.But under a lot of situations, the traffic load of medium and pressure can produce and can produce bigger variation, general shrouds throttling owing to bear higher inside and outside differential pressure, causes the valve leak amount to increase, and operating device is stressed bigger, cause valve stuck easily, and washing away flap; Influencing valve body uses; And the pressure of general superheated vapor also has the fluctuation of certain limit, causes steam flow rate excessive noise height in the valve, causes vibration easily.

[model utility content]

The regulation range that has modulating valve now is little, leakage rate is big in order to overcome, the deficiency of adjusting instability etc., the utility model provides a kind of balanced type multifunctional regulating valve, this valve can be fitted the rate-of flow load regulation range than under big and the elevated pressures situation, all can normally use stably, be applicable to the multifunctional regulating valve that multiple parameter such as flow, pressure, temperature is regulated.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of balanced type multifunctional regulating valve, its valve rod, secondary flap, after balance valve core is connected, be placed in integral type shrouds, be placed in the valve body after joining sealing gasket, load onto fixedly valve gap then, secondary flap was at first opened with less steering force when valve rod moved up, medium successively enters and shrouds and secondary flap carries out throttling, balance valve core is opened immediately and is realized the adjusting of throttling again, can realize the control of cooling water pressure under the big pressure reduction, steering force is less simultaneously, integral type is shrouded the double sealing structure that has changed traditional cage type regulating valve, adopt single sealing configuration valve seal of being more convenient for, reduced leakage point, throttling process is then being shrouded inner control.Reduce noise effectively, avoid vibrating the generation of washing away phenomenon, prolong and use life of valve.

It mainly adopts valve rod 6 and balance valve core 3 to connect and have secondary flap 4, can realize that the adjusting of certain pressure reduction down-off or the pressure under the certain flow regulates, have simple in structure, compactness; Volume is little, and is in light weight, and specified negotiability (C v value) is big, once assembles the up-to-standard rate height, has under the condition of equal driving source, can bear High Pressure Difference and high-leakage grade; Greatly reduce the leakage rate of modulating valve, can reduce the kinetic noise of modulating valve, and can reduce the probability of cavitation erosion and cavitation phenomenon generation.

(1) adopt integral type to shroud the single-stage sealing and the balance valve core structure is its Design Mechanism, simple in structure, regulation range is big.

(2) increase secondary flap structure, effectively reduce steering force, improve the sealing grade, the friction noise is low.

(3) throttleng surface and sealing surface separate, anti-washing away.

The beneficial effects of the utility model are, can be under high pressure and variable working condition control media pressure and temperature accurately, realize that High Pressure Difference condition down-off regulates simultaneously easily, be applicable to various working; Compact structure is simple.

Further understand feature of the present utility model and technology contents for making, see the utility model drawings and embodiments for details, yet appended graphic only for reference and explanation usefulness is limited the utility model.

[description of drawings]

Fig. 1 is the utility model schematic representation;

1. valve bodies among the figure, 2. integral type is shrouded, 3. balance valve core, 4. secondary flap, 5. flap lid, 6. valve rod, 7. valve gap is 8. gone up sealing gasket, 9. locking ring, 10. lower seal pad.

[embodiment]

Below in conjunction with drawings and Examples the utility model is described further:

In Fig. 1, a kind of balanced type multifunctional regulating valve, valve rod (6), secondary flap (4) is fixedly connected to be placed in the balance valve core (3), compresses by flap lid (5) and connects to form movable part; Integral type is shrouded (2) and is installed lower seal pad (10) additional and last sealing gasket (8) is placed in the valve body (1), and is fixed in the valve by valve gap (7); Balance valve core (3) is installed on integral type and shrouds in (2), is driven by valve rod (6); During valve opening, the balance valve core (3) of open auxiliary flap (4), and lifting successively, balance valve core (3) shrouds in (2) in integral type and moves up and down; Can be by receiving electric signal, the aperture of automatic regulating valve door in stroke range.

Can be under high pressure and variable working condition control media pressure and temperature accurately, realize that High Pressure Difference condition down-off regulates simultaneously easily, be applicable to various working; Compact structure is simple.

Yet the preferable feasible embodiment of above-mentioned only the utility model, non-so limitation the utility model protection domain is done various distortion or is applied mechanically all within this technological scheme protection domain according to above-described embodiment.

Claims

1. a balanced type multifunctional regulating valve is characterized in that, after being connected by valve rod, secondary flap, balance valve core, is placed in integral type shrouds, and is placed in the valve body after joining sealing gasket, loads onto fixedly valve gap then.