CN201170360Y - Ultra small flow dynamic flow-balancing valve bladder with inner barrel - Google Patents

Abstract

The utility model discloses a valve liner of an ultra-small flow dynamic flow balance valve with an inner cylinder, comprising a valve liner cover, wherein the upper part of the valve liner cover is provided with a cut-off nozzle, the inner cylinder is sleeved in the cut-off nozzle, and corresponding positions of the cut-off nozzle and the inner cylinder are provided with curved holes, so that flow accuracy can be controlled to between 5 percent and minus 5 percent, when pressure difference is between 10 and 100KPa and the flow requirement is less than or equal to 0.1L/S. The aim of controlling the flow area can be achieved mainly through controlling the dimension of a slit of a flow channel and the up-and-down motion of the cut-off nozzle along with the pressure difference.

Description

The extra small flow dynamics flow balance valve of band inner core valve courage

Technical field

The utility model is the valve device of common engineering, relates in particular to the extra small flow dynamics flow balance valve of a kind of band inner core valve courage.

Background technique

In central air-conditioner or central heating system, a unsettled pressure difference is arranged between inlet pipeline and the water return pipeline, under situation about changing, keep the constant of pipeline water amount at pressure reduction, need to install a dynamic flow balance valve.Dynamic flow balance valve in the market mostly adopts thin-wall curve cellular type valve courage, this valve courage for flow smaller or equal to the 0.1L/S demand, then be difficult to satisfy required precision, main cause is that the dimensioned of calculating requires too high, according to domestic existing level of processing, be difficult to reach the requirement of control accuracy.

Summary of the invention

The purpose of this utility model is exactly in order to address the above problem, and provides a kind of and has simple in structurely, easy to use, easy to process, and the precision height can effectively satisfy the extra small flow dynamics flow balance valve of the band inner core valve courage of advantage such as pipeline needs.

For achieving the above object, the utility model adopts following technological scheme:

The extra small flow dynamics flow balance valve of a kind of band inner core valve courage, it comprises valve liner cover, and the mouth that dams is installed on its top, and suit inner core in the described mouth that dams is provided with curved hole in the relevant position of dam mouth and inner core.

Described damming connects firmly by fastening screw trip bolt between mouth and inner core.

In the described valve liner cover, dam mouth and inner core bottom also be provided with spring, the valve liner cover bottom is provided with plug.

Structure of the present utility model can make the valve courage in pressure reduction is the 10-100KPa scope, and flow is the valve courage of target flow arbitrarily in the 0.04L/S--0.1L/S scope, and flow control accuracy reaches ± and 5%.According to flow formula $q=\mathrm{\ξA}\sqrt{\mathrm{\ΔP}},$ Demand volume q, flow coefficient ξ are definite value, and pressure differential deltap P is changing with system's pressure reduction, so area of passage A need change with pressure reduction.

The utility model adopts control area of passage A with the mode that pressure differential deltap P changes, and current are passed through from finedraw, and difficulty of processing is less relatively, can guarantee the demand precision, satisfies the needs of engineering.

The beneficial effects of the utility model are: be easy to processing, cost is low, can satisfy requirement of engineering.

Description of drawings

Fig. 1 is the front section view of valve courage.

Wherein, 1. fastening screw trip bolt, the mouth that 2. dams, 3. inner core, 4. valve liner cover, 5. spring, 6. plug.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Among Fig. 1, the extra small flow dynamics flow balance valve of band inner core valve courage comprises valve liner cover 4, and the mouth 2 that dams is installed on its top, suit inner core 3 in the mouth 2 that dams, and the relevant position of mouth 2 with inner core 3 is provided with curved hole damming.Dam 3 of mouth 2 and inner cores connects firmly by fastening screw trip bolt 1.In the valve liner cover 4, the mouth 2 that dams also is provided with spring 5 with inner core 3 bottoms, valve liner cover 4 bottoms are provided with plug 6.

After installing in the valve body, under the effect of pipe-line system, have a unsettled pressure difference between the top water intake of valve courage and the bottom water outlet to the valve courage.Part 2 dams flowing hole according to calculating the line cutting on mouth and part 3 inner cores.When pressure difference was added on the valve courage, part 2 mouth that dams was mobilizable pressure-containing parts, and under the effect of top hydraulic pressure and lower piece 5 springs, the mouth that dams is up and down, kept balance.Water flows through from the dam curved hole of mouth of the part 2 in the middle of part 3 inner cores and part 4 valve liner covers, and when pressure differential deltap P increases, the mouth that dams moves down, and discharge area A reduces; P reduces when pressure differential deltap, moves on the mouth that dams, and discharge area A increases, thereby flow that can maintaining valve courage two ends is constant.

Claims (3)

1, the extra small flow dynamics flow balance valve of a kind of band inner core valve courage, it comprises valve liner cover, the mouth that dams is installed on its top, it is characterized in that: suit inner core in the described mouth that dams is provided with curved hole in the relevant position of dam mouth and inner core.

2, the extra small flow dynamics flow balance valve of band inner core according to claim 1 valve courage, it is characterized in that: described damming connects firmly by fastening screw trip bolt between mouth and inner core.

3, the extra small flow dynamics flow balance valve of band inner core according to claim 1 valve courage is characterized in that: in the described valve liner cover, dam mouth and inner core bottom also be provided with spring, the valve liner cover bottom is provided with plug.

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