CN2781126Y - High precision dynamic flow balanced valve - Google Patents

Abstract

The utility model discloses a valve, which is aimed to provide a dynamic flow balance valve with a mechanical self-operated high-precision automatic flow balancing function. The utility model comprises a valve body, wherein both ends of which are provided with flange connection, wherein the valve body is provided with a Y-shaped projecting part, and the interior of the valve body is provided with a mounting cylinder. The middle part of the mounting cylinder is provided with a mounting plate, at least one automatic flow balance controller is arranged on the mounting plate and the lower part of the mounting cylinder is connected with a repairing disk and is provided with at least one outflow hole. The utility model uses a mechanical self-operated principle, and the flow control of the valve is assembled by a flow automatic balancing controller with modularization, small flow and high precision. The utility model has the advantages of small flow size, wide accommodating range, high controlling precision, simple structure, easy fabrication, flexible installation, low cost and convenient repair. The expansion of a system and the upgrading of a product are easy. The problems of dynamic flow balance of a pipe network system can be thoroughly solved.

Description

High-Precision Dynamic Flow Balancing Valve

Technical field

The utility model relates to a kind of valve of water system, and more particularly, the utility model is a kind of dynamic flow balance valve with mechanical self-powering type high-precision automatic flow equilibrium function.

Background technique

In a large amount of different journey pipe network water system of heating, air-conditioning, the resistance of often only considering index circuit during actual design calculates, when the available pressure head of system's least favorable node was guaranteed, the effect pressure head of other node may cause the hydraulic misadjustment of system much larger than design load.Also can cause moving flow off-design value and the type selecting of water pump is excessive or improper, the result of pipe network water force unbalance causes the increase of a large amount of wastes of the energy, running noises and the shortening of service life of equipment.

The heating ventilation air-conditioning system power consumption accounts for about 65% of the total power consumption of building, how to carry out the central air-conditioner technology of energy-conserving and environment-protective, efficient natural, paid more and more attention.

In fields such as central air conditioner main machine water systems, need to widely apply automatic flow control valve.

The integrated assembling of the general employing of the automatic flow control valve of at present a large amount of import brands.Class as the high-precision automatic flow control valve, this design concept is not easy to maintenance, the maintenance in later stage, control accuracy descends after the long-time running, wasted energy consumption, and the initial working pressure of automatic flow control valve that domestic manufacturer produces is generally higher, flow accuracy is low, and also there are same problem in later stage maintenance and maintenance, and poor reliability.

The present known mechanical self-powering type dynamic flow balance valve of also not finding heavy caliber, highi degree of accuracy, band maintenance dish.

Summary of the invention

Main purpose of the present utility model is to overcome deficiency of the prior art, and a kind of dynamic flow balance valve with mechanical self-powering type high-precision automatic flow equilibrium function is provided.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model provides a kind of High-Precision Dynamic Flow Balancing Valve, comprises that two ends are provided with the valve body 100 that flange connects, and described valve body 100 has a Y shape projection, and there is installation tube 104 inside; Installation tube 104 middle parts are provided with mounting disc, and at least one automatic flow balance control device 103 is installed on it; Installation tube 104 bottoms are connected with maintenance dish 107, and at least one flow-out hole 105 is set; Described automatic flow balance control device 103 comprises flow control valve cylinder 3, flow control spool 4, stainless steel spring 5, seal ring 6 and friction top 7, but flow control spool 4 longshore current control valve tubes 3 inwalls slide, and it is provided with entrance face fixed hole 1 and inlet effluent fixed hole 2.

Flow control spool 4 described in the utility model is a hollow, also has at least two side stream passages 8 on the wall.

Side stream passages 8 described in the utility model has the curved edge that amplifies gradually along fluid flow direction.

There is an O RunddichtringO 102 installation tube 104 front edges described in the utility model and valve body 100 inwall joints.

Valve body 100 entry ends described in the utility model have a measurement to chew 101.

Valve body 100 outlet end described in the utility model have a measurement to chew 108.

Also has a gasket seal 106 between installation tube 104 described in the utility model and the maintenance dish 107.

Maintenance dish 107 described in the utility model is connected on the outstanding flange of valve body 100Y shape by bolt.

The beneficial effects of the utility model are:

The utility model adopts mechanical self-powering type principle, the flow control of valve is combined by modularization, small flow, high-precision flow automatic balance control gear, flow direction dimension is little, wide accommodation, control accuracy height, simple in structure, easily manufactured, flexible for installation, with low cost, the expansion of maintenance convenience and system and the upgrading of product are very easy, can thoroughly solve the dynamic flow equilibrium problem of pipe network system.

Description of drawings

Fig. 1 is embodiment's 1 an of the present utility model dynamic flow balance valve structural representation.

Fig. 2 is an A-A sectional drawing among Fig. 1

Fig. 3 is the structural representation of automatic flow balance control device

The reference character of each parts is among the figure:

Y valve body 100 among Fig. 1 is measured and is chewed 101,108, seal ring 102, automatic flow balance control device 103, installation tube 104, flow-out hole 105, gasket seal 106, maintenance dish 107;

The reference character of each parts is among Fig. 3: entrance face fixed hole 1, inlet effluent fixed hole 2, flow control valve cylinder 3, flow control spool 4, stainless steel spring 5, seal ring 6, friction top 7, side stream passages 8.

Embodiment

With reference to figures 1 through accompanying drawing 3, will be described in detail the utility model below.

Specific embodiment 1 provides the dynamic flow balance valve that is used for water system, comprise the heavy caliber Y shape valve body 100 that can the flange mode connects, measure and chew 101,108, seal ring 102, automatic flow balance control device 103, installation tube 104, flow-out hole 105, gasket seal 106, maintenance dish 107 evenly are equipped with at least one automatic flow balance control device 103 based on mechanical self-powering type principle (accompanying drawing 1 belongs to the High-Precision Dynamic Flow Balancing Valve that two automatic flow balance control devices 103 are installed to accompanying drawing 3) in the described installation tube 104.

Automatic flow balance control device 103 described in the utility model is a modularization, high-precision constant flow control valve, comprises entrance face fixed hole 1, inlet effluent fixed hole 2, flow control valve cylinder 3, flow control spool 4, stainless steel spring 5, seal ring 6, friction top 7, side stream passages 8.Flow control spool 4 is a hollow, but the slip of longshore current control valve tube 3 inwalls, and it is provided with entrance face fixed hole 1 and inlet effluent fixed hole 2.Have at least two effluent through holes on the wall, described effluent through hole has the curved side opening that amplifies gradually along fluid flow direction.

The technological principle that its technical problem that solves the utility model adopts is:

According to the water flow designing requirement of dynamic flow balance valve, select the criterion modulus and the corresponding number of flow automatic balance control gear 103 flexibly.For example the little modulus of the flow of certain bore automatic-balancing controller 103 has 12.5m ³/ h, 25m ³/ h is in order to design a 25m ³The dynamic flow balance valve of/h can be selected 2 * 12.5m ³The pattern of/h can certainly be selected 1 * 25m ³The pattern of/h, promptly an automatic-balancing controller 103 only is installed in installation tube 104.

Flow automatic balance control gear 103 described in the utility model can carry out flexible combination according to the design discharge needs of equilibrium valve water flow.

There is the current through hole of special shape the side of flow control spool 4 described in the utility model, and end face is offered the circular hole of fixed-area, between flow control spool 4 and the friction top 7 highi degree of accuracy stainless steel spring 5 is housed, and flow control spool 4 can carry out the water (flow) direction action.When coming water pressure to raise, flow control spool 4 promotes length of spring compressed, and the overall flow area of spool reduces; When coming water pressure to reduce, flow control spool 4 extends because of spring force, and the overall flow area of spool increases, thereby the flow setting type of realization valve is controlled function automatically.

Flow action makes flow control spool 4 and flow control valve cylinder 3 that relative movement displacement s be arranged on flow control spool 4 time, forms pressure drop Δ P simultaneously in flow control spool 4 both sides.

Pass through flow (Q) representation of control valve valve body this moment:

$Q=\mathrm{Cv}\×\sqrt{\mathrm{\ΔP}}$

Cv is the flow coefficient of valve

Flow control spool 4 is when action, and the effluent via area makes it that different negotiabilities be arranged changing, and Cv is the function of displacement s, its mathematic(al) representation:

Cv＝Cv(s)

Flow control spool 4 two ends pressure drop Δ P act on the power and the spring force F balance of spool 4, and we adopt the highi degree of accuracy stainless steel spring with linear deformation characteristic, and spring force F is the linear function of displacement s (being amount of spring compression), and Δ P also is the function of displacement s.

Suppose the top area of contour Ap (belonging to constant) of flow control spool 4, preliminary examination spring force F ₀, K is the Young's modulus of spring, they have following relation: they have following relation:

$Q=\mathrm{Cv}\left(s\right)\×\sqrt{\mathrm{\ΔP}\left(s\right)}$

F＝K×s+F ₀＝ΔP(s)×Ap

Effluent through hole flow-passing surface belongs to the cylndrical surface perforate, so flow-passing surface total area A can pass through the unfolded drawing cartographic represenation of area:

A＝A(s)

Simplify according to the one-dimensional model of fluid mechanics equation of continuity and momentum equation equation, when fluid is flowed through the flow control spool 4 of valve,, can obtain relation by the simultaneous solution set of equation in order to keep constant flow:

A(s)＝C ₁×(F ₀+K×s+C ₂) ^-1/2

C wherein ₁, C ₂, F ₀Be constant, K is the Young's modulus of spring, demarcates by experiment to obtain easily, and concrete data can be searched the modularization sample.

The perforate of this area of passage is easy to realize on the digital control processing machine.

Flow automatic control device 103 described in the utility model is exactly to utilize the highi degree of accuracy of this mathematical relationship control flow rate constant.

At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims (8)

1, a kind of High-Precision Dynamic Flow Balancing Valve comprises that two ends are provided with the valve body (100) that flange connects, and it is characterized in that described valve body (100) has a Y shape projection, and there is installation tube (104) inside; Installation tube (104) middle part is provided with mounting disc, and at least one automatic flow balance control device (103) is installed on it; Installation tube (104) bottom is connected with maintenance dish 107, and at least one flow-out hole 105 is set; Described automatic flow balance control device (103) comprises flow control valve cylinder (3), flow control spool (4), stainless steel spring (5), seal ring (6) and friction top (7), flow control spool (4) but longshore current control valve tube (3) inwall slide, it is provided with entrance face fixed hole (1) and the effluent fixed hole (2) that enters the mouth.

2, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, described flow control spool (4) is a hollow, also has at least two side stream passages (8) on the wall.

3, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, described side stream passages (8) has the curved edge that amplifies gradually along fluid flow direction.

4, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, there is an O RunddichtringO (102) described installation tube (104) front edge and valve body (100) inwall joint.

5, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, described valve body (100) entry end has a measurement to chew (101).

6, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, described valve body (100) outlet end has a measurement to chew (108).

7, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, also has a gasket seal (106) between described installation tube (104) and the maintenance dish (107).

8, High-Precision Dynamic Flow Balancing Valve according to claim 1 is characterized in that, described maintenance dish (107) is to be connected on the outstanding flange of the Y shape of valve body (100) by bolt.

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