CN201190822Y

CN201190822Y - Pressure-limiting valve

Info

Publication number: CN201190822Y
Application number: CNU2008200454076U
Authority: CN
Inventors: 谢庆俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-21
Filing date: 2008-03-21
Publication date: 2009-02-04
Anticipated expiration: 2018-03-21

Abstract

The utility model relates to a pressure limited valve, comprising a valve body in which a valve base, a pressure adjuster, a spring and a seal ring are arranged, a water outlet joint and a water inlet joint which are arranged at two ends of the valve body, wherein the valve body is hollow whose two ends are respectively connected with the connecting parts of the water outlet joint and the water inlet joint to form the whole valve body, the valve base is arranged in the valve body near the water inlet joint, the valve base is provided with a chamber whose lower side is provided with a plurality of water holes and the upper side is provided with through holes communicated with the water outlet joint via the pressure adjuster, the outer wall of the valve base is provided with a spring matching part, the pressure adjuster is arranged in the valve body near the water outlet joint and can slide in the valve body axially, one end of the pressure adjuster is sheathed in the through hole of the valve base, the pressure adjuster and the valve base have a water clearance therebetween, the outer wall of the pressure adjuster is provided with a spring matching part, and two ends of the spring are respectively matched with the spring matching part of the pressure adjuster and the spring matching part of the valve base.

Description

Pressure-limit valve

Technical field

The utility model relates to the pressure-limit valve in the plumbing field, relates in particular to a kind of pressure-limit valve that is used for water supply of water heater systems such as solar energy.

Background technique

In order to guarantee water heater equipment stable water outlet and the damage that reduces to cause equipment, all can reduction valve be set in prior solar water heater and the electric water heater water system or pressure-limit valve is regulated hydraulic pressure because of the variation in pressure of tap water.But, when the discharge pressure of reduction valve or pressure-limit valve changes the infringement that is easy to cause when excessive to Bathing apparatus, especially after the downstream of reduction valve waterexit end watering equipment is closed, the reduction valve discharge pressure is consistent with intake pressure, promptly supply water static when not flowing reduction valve do not have decompression at all, at this moment, when if the water in the water heater becomes big because of being subjected to pressure pressure, the too high then water tank of hydraulic pressure just has the danger of blast, and water tank under high temperature and high pressure environment easily by corrosion, especially can the infringement of damaging property to those solar water heater systems that must under low hydraulic condition, use.

In order to solve foregoing problems, No. 03227837 utility model patent of China discloses a kind of decompression voltage stabilizing and pressure limiting dual-purpose safe valve, comprise valve body, spool and bonnet, be provided with lower inner cavity in the valve body, be connected by spool bore between the last lower inner cavity, spool is formed by stacking by rubber pad and metal gasket, is fixed on the lower end of valve core rod by nut; Be fixed with diaphragm of rubber in the valve core rod upper end, the diaphragm of rubber edge is pressed abd fixed on by bonnet on the inner chamber of valve body, is provided with spring chamber in the bonnet, and valve core rod is withstood in spring lower end wherein.Mutual balance between the thrust that elastic force that this safety valve produces valve core rod by spring and hydraulic pressure produce valve core rod, thereby the distance between spool and the spool bore is constantly changed: distance diminished when hydraulic pressure was big, and the water yield that is entered inner chamber by lower inner cavity tails off; Apart from becoming big, the water yield that enters inner chamber is increased when hydraulic pressure is big, promptly adjust the water yield that enters inner chamber automatically, to keep the stable of inner chamber hydraulic pressure.A side of this safety valve valve body is provided with the pressure limiting valve seat simultaneously, the pressure limiting valve base cavity communicates with the last inner chamber of valve body by aperture, also be provided with rubber pad, pressure limiting valve stem and cover pressure limiting spring thereon in the pressure limiting valve base cavity successively, when the water tank internal pressure is excessive, hydraulic pressure in the body cavity will overcome the elastic force of pressure limiting spring, back down pressure limiting valve stem, and a part of water promptly flows out from the pupil of regulating Luo Gan, pressure is diminished, thereby guarantee that water tank can not damage because of pressure is excessive.But the safety valve component of said structure are more, complex structure.

The model utility content

The technical problems to be solved in the utility model provides a kind of simple in structure, safe and reliable pressure-limit valve.

For solving the problems of the technologies described above, the utility model provides following technological scheme: pressure-limit valve comprises: valve body, be located at valve seat, pressure governor, spring, seal ring in the valve body and water output connector and the water supply connector of being located at the valve body two ends; Described valve body is a hollow article, and its two ends are connected to form whole valve body with the joint of water output connector and water supply connector respectively; Described valve seat is arranged on an end of close water supply connector in the valve body, and a cavity is set in the valve seat, and the cavity downside is provided with several water passage holes, and upside is provided with through hole and communicates with water output connector by pressure governor; The valve seat outer wall is provided with the spring auxiliary section; Described pressure governor is located at an end of close water output connector in the valve body and can slides in valve body along the axis of valve body, and pressure governor one end is sleeved in the through hole of valve seat, has water space between pressure governor and the valve seat; The pressure governor outer wall is provided with the spring auxiliary section; Described both ends of the spring cooperates with the spring auxiliary section of pressure governor and the spring auxiliary section of valve seat respectively.

By above scheme as seen, the utility model utilizes pressure governor directly to cooperate with spring, need not that elastic diaphragm additionally is set and control pressure governor, structure is more simple, and sense the variation of water pressure by pressure governor, pressure governor is slided in valve body, dynamically regulate the size of crossing water space between pressure governor water passage hole and the sealing gasket, when the water outlet device shutdown made the pressure-limit valve downstream form closed system, discharge pressure rose to preset pressure, crossed water space and closed, discharge pressure disappearance pressure source, no longer rise, thereby pressure maximum is remained on below the predefined value, this structure makes pressure-limit valve have step-down simultaneously concurrently, the characteristics of voltage stabilizing and pressure limiting.Realize the purpose of step-down and pressure limiting especially also playing the pressure limiting effect by sensing water pressure to Static Water.The utility model can be widely used in the low service of the cold water incoming end of various bath apparatus or solar water heater, has easy for installation, safe and reliable advantage.

Description of drawings

Fig. 1 is a sectional view of the present utility model.

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

As shown in Figure 1, the utility model pressure-limit valve comprises: valve body 1, valve seat 10, water output connector 2, water supply connector 13, pressure governor 4, spring 6, housing screw 9, set screw nut 12 and various seal ring 5.

Into water 21 is offered in water supply connector 13 lower ends, and the upper end is provided with joint (not label); Water output connector 2 upper ends are provided with water outlet 22, and the lower end is provided with joint (not label).Valve body 1 is a hollow article, and two ends are connected with the joint of water output connector 2 with water supply connector 13 respectively, forms whole valve body, and water outlet 22 and water intake 21 lay respectively at the two ends of valve body 1.

Valve seat 10 is arranged on close water supply connector 13 ends in the valve body 1, and is provided with seal ring 5 between the water supply connector 13, and valve seat 10 inside are a cavity, and the cavity downside offers several water passage holes 20, and upside is provided with through hole and communicates with water outlet 22 by pressure governor 4.Valve seat 10 outer walls are provided with spring auxiliary section (not label).

Pressure governor 4 is a hollow article, and it is set in valve body 1 inside, and near water output connector 13 sides, pressure governor 4 one ends are sleeved in the through hole of valve seat 10, and pressure governor 4 can slide in valve body 1 along the axis of valve body 1, and pressure governor 4 outer walls are provided with the spring auxiliary section.Had water space 30 between pressure governor 4 and the valve seat 10.

Spring 6 is arranged in the valve body 1, and its two ends cooperate with pressure governor 4 spring auxiliary sections and valve seat 10 spring auxiliary sections respectively.

Seal ring 5 is separately positioned between water output connector 2 and the valve body 1, between pressure governor 4 and the valve body 1, between pressure governor 4 and the valve seat 10 and between valve body 1 and the water supply connector 13.

The utility model in use, when discharge pressure rose, hydraulic pressure increased the active force of pressure governor 4, pressure governor 4 pressure springs 6 are downward, cross water space 30 and reduce, and make discharge pressure reduce; When discharge pressure was increased near predefined value, hydraulic pressure increased the active force of pressure governor 4, and pressure governor 4 pressure springs 6 are downward, and water space 30 nearly is reduced to and closes excessively, makes discharge pressure remain below predefined value; When pressure-limit valve water outlet 22 is closed because of the downstream watering equipment, pressure-limit valve water outlet 22 pressure increase gradually, when pressure reaches predefined value, pressure governor 4 pressure springs 6 are downward, crossing water space 30 closes by being reduced to, even this moment, the downstream watering equipment was not opened, hydrostatic pressing also can remain on and be no more than predefined value, thereby reaches the effect of pressure limiting.

Certainly, technical conceive of the present utility model is not limited in the foregoing description, can also obtain many different concrete schemes according to design of the present utility model, for example, water output connector and valve body one can be made as, also set screw nut and valve seat one can be made as; All should be included within the described scope of claim such as these changes and equivalent transformation.

Claims

1, pressure-limit valve comprises:

Valve body, be located at valve seat, pressure governor, spring, seal ring in the valve body and water output connector and the water supply connector of being located at the valve body two ends; Described valve body is a hollow article, and its two ends are connected to form whole valve body with the joint of water output connector and water supply connector respectively;

It is characterized in that:

Described valve seat is arranged on an end of close water supply connector in the valve body, is a cavity in the valve seat, and the cavity downside is provided with several water passage holes, and upside is provided with through hole and communicates with the water output connector end by pressure governor; The valve seat outer wall is provided with the spring auxiliary section;

Described pressure governor is located at an end of close water output connector in the valve body and can slides in valve body along the axis of valve body, and pressure governor one end is sleeved in the through hole of valve seat, has water space between pressure governor and the valve seat; The pressure governor outer wall is provided with the spring auxiliary section;

Described both ends of the spring cooperates with the spring auxiliary section of pressure governor and the spring auxiliary section of valve seat respectively.

2, pressure-limit valve according to claim 1 is characterized in that:

Described valve seat cavity inner wall is provided with seal ring, and described seal ring is between pressure governor and valve seat.

3, pressure-limit valve according to claim 1 is characterized in that:

Be provided with seal ring between described pressure governor and the valve body.

4, pressure-limit valve according to claim 1 is characterized in that:

Be provided with seal ring between described water output connector and the valve body.

5, pressure-limit valve according to claim 1 is characterized in that:

Be provided with seal ring between described water supply connector and the valve seat.