CN2872013Y - Electrically dynamic-balanced adjusting valve - Google Patents

Abstract

The utility model discloses a dynamic equilibrium electric control valve, which comprises a valve body, an upper end cover and a lower end cover, a valve rod and a valve core, the upper press cover is connected with the upper end of the valve body, the valve rod penetrates the central screw hole at the upper end cover, a constant-voltage device is positioned inside the valve body for constant pressure difference outside and inside of the valve core to make flow of any adjusting position constant for the valve core. The constant-voltage device comprises a guiding press hole, a film sheet, a spring and an inner supporter. The guiding press hole guides pressure of fluid medium entering the valve body to make the film sheet and the spring to move inside the inner support, to guarantee the open area at the exit and the pressure difference for fluid medium entering the entrance of the valve body be in inverse proportion. As soon as the utility is controlled at the basic flow through the valve rod, when the fluctuation occurs upon the fluid pressure of the system the fluctuation transmits the pressure through the guiding press hole to the lower side of the film sheet and combines with the spring at the upper film sheet to drive the film sheet to move upward or downward for blocking or releasing the open area at the exit to increase or reduce internal pressure, to guarantee outer and inner pressure difference of the valve core constant, meeting the purpose of auto controlling and stabilizing flow.

Description

The dynamic balance motor-driven modulating valve

Technical field

The utility model relates to a kind of fluid flow Self controlling valve, it specifically is a kind of dynamic balance motor-driven modulating valve, be mainly used on the end-equipment of heating and air-conditioning system,, reach the turnover wind-warm syndrome degree of constant end-equipment connection and the purpose of energy saving with the water flow of control by end-equipment.

Background technique

Existing valve does not have the function of the fluid flow that flows through valve body being carried out dynamic adjustments.In case the pressure of current fluctuates, the size of the water flow in the pipeline just changes thereupon, causes the too high or too low for temperature of cooling (warming up) space, causes energy waste or cooling (warming up) deficiency; Also can cause the imbalance of each regional water system.In order to alleviate the influence of this water pressure fluctuations, need debug system, not only trouble expends the plenty of time; And artificial adjusting may damage system balancing.

Summary of the invention

The purpose of this utility model just provides a kind of dynamic balance motor-driven modulating valve, to solve the problem that can not carry out the transient equiliblium adjusting to the fluid flow that flows through valve body automatically that prior art exists.

The technical solution of the utility model is: comprise valve body, upper end cap, lower end cap, gland, valve rod, spool, upper end cap and lower end cap are connected to the top and bottom of valve body, the upper end cap center screw connects gland, the gland center is provided with screw, the upper end of valve rod screws out the screw at gland center, the lower end of the valve rod spool interior with being located at valve body is connected, it is characterized in that: the lower end at described spool is provided with constant-voltage equipment, this constant-voltage equipment comprises inner support, diaphragm, the spring and the axis of guide, the edge of diaphragm is connected with the lower edge of inner support, spring is supported between the axle center of diaphragm and inner support, at diaphragm, the axis of guide is passed in the axle center of inner support and spring, the upper and lower end of this axis of guide is separately fixed between described spool lower end and the lower end cap center, be provided with flow channels at interior body frame, the periphery of described diaphragm is provided with crimp and can covers the flow channels of described bottom; Between the inside of the entry end of described valve body and lower end cap, be provided with the pressure guide hole that is communicated with.

Inboard central authorities are provided with flange at described lower end cap, and the cavity of these flange central authorities is inboard to be communicated with described pressure guide hole; Described inner support is made of overcurrent tube and guideway, the bottom of overcurrent tube and upper end are equipped with described flow channels, guideway is located at the center upper portion in the overcurrent tube, connects by radial rib between the two, and the described axis of guide slides and passes described guideway; The lower edge of overcurrent tube is enclosed between the outer and valve body lower end of the flange of described lower end cap, is provided with seal ring between the outside between flow channels on the overcurrent tube and the following flow channels and valve body import and export; Described diaphragm is circular, and its external diameter cooperates with the overcurrent tube internal diameter of described inner support; Be provided with the upper spring seat of indented central in the periphery of described guideway, the upper end of described spring is installed in this upper spring seat, the lower end of this spring is passed the overcurrent tube and is connected with the diaphragm bottom; Be connected the lower end of described spool in the upper end of described overcurrent tube.

Upside at described diaphragm is provided with a glass type pad.

Be provided with valve driving mechanism in the upper end of described valve rod.

Described driving mechanism comprises support, connecting rod, nut and electric actuator, the lower end of support is fastened on the upper end of described gland by nut, the upper end of support is connected with the electric actuator shell, and connecting rod is connected between the clutch end of described valve rod outer end and electric actuator.

The utility model has the advantages that: in case after regulating bare flow by valve rod and spool, hydrodynamic pressure appearance fluctuation when system, this fluctuation transfers the pressure to the diaphragm below by pressure guide hole, and with the spring synergy of diaphragm top, driven diaphragm is moved up or down, block or discharge the flow area of making a slip of the tongue, internal pressure is raise or reduction, constant with the inside and outside differential pressure that guarantees spool, reach the purpose of automatic control regime flow, the trouble of having avoided artificial debugging and the destruction that may cause system balancing have been avoided because the variation of system pressure causes energy waste or cooling (warm up) is not enough and the imbalance of each regional water system.

Description of drawings

Fig. 1 is a general structure cross-sectional schematic of the present utility model;

Fig. 2 is the decomposition texture schematic representation of Fig. 1;

Fig. 3 is the axial sectional view of diaphragm of the present utility model;

Fig. 4-the 1st, the form structure schematic representation of overcurrent tube of the present utility model;

Fig. 4-the 2nd, the worm's eye view of overcurrent tube of the present utility model;

Fig. 4-the 3rd, the A-A sectional view of Fig. 4-2;

Fig. 5-the 1st, the structural representation of the utility model spool;

Fig. 5-the 2nd, the worm's eye view of Fig. 5-1;

Fig. 6 is an axis of guide schematic representation of the present utility model;

Fig. 7 is the sectional view of the utility model cup type pad.

Embodiment

Referring to Fig. 1～Fig. 7, the utility model comprisesvalve body 11,gland 6,valve rod 8,seal ring 9,spool 10 and constant-voltage equipment.Upper end cap 7 and lower end cap 25 are connected the top and bottom ofvalve body 11 by bolt, andgland 6 is by being threaded in the center ofupper end cap 7, andvalve rod 8 passes the center hole ofgland 6, is provided with the screw thread that cooperatively interacts between the two.Constant-voltage equipment be installed in theinlet 20 of describedvalve body 11 and thespool 10 of outlet between 27 below, between theinlet 20 ofvalve body 11 and lower end cap end, be provided withpressure guide hole 21,22,23, so that the force value of the area of passage of constant-voltage equipment and the flowing medium that flows intovalve body inlet 20 is inversely proportional to.Side at lower end cap 25 is provided with control flowrate adjusting screw 19, and its inner extend between the pressure guide hole 22,23.

Described constant-voltage equipment comprisesdiaphragm 17, cuptype spring seat 16,inner support 13,spring 15 and the axis ofguide 14, is provided with annular flange flange 26 in described lower end cap 25 inboard central authorities, and the cavity of these flange 26 central authorities is communicated with described pressure guide hole the inner.

Inner support 13 is made of overcurrent tube 48 and guideway 45, the bottom of overcurrent tube 48 and upper end are equipped with flowing hole 44,41 and 42, guideway 45 is by the radial rib 47 coaxial center upper portion that are connected in the overcurrent tube 48, the lower end of overcurrent tube 48 is enclosed within outside the flange 26 of described lower end cap, is provided with seal ring 12 (referring to Fig. 4-1～Fig. 4-3) between the outside and the valve body import and export between the flowing hole up and down at overcurrent tube 48.

Describeddiaphragm 17 is circular, its external diameter cooperates with overcurrent tube 48 internal diameters of described inner support, this circular axial cross section is approximately the M structure, the edge that protrude this M structure upper end is the annulus 33 (referring to Fig. 3) of circular shape, and the upper end central authorities of this M structure are connectingcup type pad 16 as lower spring cup.Cup type pad 16 connects the lower end ofsprings 15, and the upper end of thisspring 15 connects the upper spring seat 46 of described inner support central authorities.Connect the lower end ofspool 10 in the upper end of the overcurrent tube 48 of described inner support, the upper end of thisspool 10 is connected with describedvalve rod 8, andvalve rod 8 and describedgland 6 center holes are by being threaded.

There is an axis ofguide 14 that is connectingdiaphragm 17 andinner support 13 up and down in central authorities at describedspring 15, change the direction that moves up and down because of pressure reduction to guaranteediaphragm 17.

Valverod 8 of the present utility model can adopt manual tune, also can be provided with driving mechanism in the upper end of described valve rod connecting rod 2.An embodiment of this driving mechanism comprisessupport 5, connectingrod 2,nut 4 and electric actuator 1, the lower end ofsupport 5 is fastened on the upper end of describedgland 6 bynut 4, the upper end ofsupport 5 is connected with electric actuator 1 shell, and connectingrod 2 is connected between the clutch end of the upper end of describedvalve rod 8 and electric actuator 1.

The utility model is when work, the flowing medium of system flows into from theinlet 20 ofvalve body 11, order is through the flowing hole (gap) 41,42 on overcurrent tube 48 tops ofinner support 13, and the flowing hole 44 of gap between overcurrent 48 and the pilot hole and overcurrent tube bottom flows out from the outlet 27 of valve body at last.When hydrodynamic pressure increases, this pressure is delivered to the lower end ofdiaphragm 17 bypressure guide hole 21,22 and 23, promote the stretching, extension that moves up ofdiaphragm 17 middle parts, stretch the flowing hole 44 thatrear film 17 has blocked part overcurrent tube, its area of passage is reduced, internal pressure raises, and it is constant to reach spool external and internal pressure difference at last, realizes that flow and system pressure change irrelevant automatic control.Vice versa, repeats no more.

Claims (5)

1. dynamic balance motor-driven modulating valve, comprise valve body, upper end cap, lower end cap, gland, valve rod and spool, upper end cap and lower end cap are connected to the top and bottom of valve body, the upper end cap center screw connects gland, the gland center is provided with screw, the upper end of valve rod screws out the screw at gland center, the lower end of the valve rod spool interior with being located at valve body is connected, it is characterized in that: the lower end at described spool is provided with constant-voltage equipment, this constant-voltage equipment comprises inner support, diaphragm, the spring and the axis of guide, the edge of diaphragm is connected with the lower edge of inner support, spring is supported between the axle center of diaphragm and inner support, at diaphragm, the axis of guide is passed in the axle center of inner support and spring, the upper and lower end of this axis of guide is separately fixed between described spool lower end and the lower end cap center, be provided with flow channels at interior body frame, the periphery of described diaphragm is provided with crimp and can covers the flow channels of described bottom; Between the inside of the entry end of described valve body and lower end cap, be provided with the pressure guide hole that is communicated with.

2. dynamic balance motor-driven modulating valve according to claim 1 is characterized in that: inboard central authorities are provided with flange at described lower end cap, and the cavity of these flange central authorities is inboard to be communicated with described pressure guide hole; Described inner support is made of overcurrent tube and guideway, the bottom of overcurrent tube and upper end are equipped with described flow channels, guideway is located at the center upper portion in the overcurrent tube, connects by radial rib between the two, and the described axis of guide slides and passes described guideway; The lower edge of overcurrent tube is enclosed between the outer and valve body lower end of the flange of described lower end cap, is provided with seal ring between the outside between flow channels on the overcurrent tube and the following flow channels and valve body import and export; Described diaphragm is circular, and its external diameter cooperates with the overcurrent tube internal diameter of described inner support; Be provided with the upper spring seat of indented central in the periphery of described guideway, the upper end of described spring is installed in this upper spring seat, the lower end of this spring is passed the overcurrent tube and is connected with the diaphragm bottom; Be connected the lower end of described spool in the upper end of described overcurrent tube.

3. dynamic balance motor-driven modulating valve according to claim 1 is characterized in that: the upside at described diaphragm is provided with a glass type pad.

4. dynamic balance motor-driven modulating valve according to claim 1 is characterized in that: be provided with valve driving mechanism in the upper end of described valve rod.

5. dynamic balance motor-driven modulating valve according to claim 4, it is characterized in that: described valve driving mechanism comprises support, connecting rod, nut and electric actuator, the lower end of support is fastened on the upper end of described gland by nut, the upper end of support is connected with the electric actuator shell, and connecting rod is connected between the clutch end of described valve rod outer end and electric actuator.

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