CN2099230U - Safety valve for limiting temperature and pressure - Google Patents

Abstract

The utility model relates to a safety valve for limiting temperature and pressure, comprising a valve cover, a valve body connected with the valve cover, valve rods arranged in the formed inner cavity of the valve cover and the valve body, and a fusible slice matched at the end of the valve rod. The utility model can simultaneously and easily limit the temperature and pressure of the matched high-temperature and high-pressure, making the fluid in the container automatically overflows when overtemperature and overpressure, and thereby, the safe handling of the high temperature and high pressure container is ensured.

Description

Safety valve for limiting temperature and pressure

The utility model belongs to safety valve, and is especially relevant with the safety valve of the warm pressure limiting of limit.

For normal operation and the safe handling that guarantees high temperature and high pressure containers or device, the warm pressure-limiting safety device of limit should be set all.

At present, Chang Yong this class device is limit temperature valve or the pressure-limit valve with simple function.Because this class valve only has a kind of function, therefore need be with the device or the container of time limit temperature pressure limiting, for example to some: heat pipe electric heater, just need two kinds of safety valves of installation, this can cause the inconvenience in the use undoubtedly.So people press for a kind of safety valve with dual functions, it can limit temperature, again can pressure limiting, thus the safe handling of assurance device or container easily.

The purpose of this utility model is will design a kind ofly can limit the safety valve with dual functions that temperature again can pressure limiting.

The limit temperature pressure-limiting safety valve that the utility model is designed, by valve gap, valve body, valve rod, stage clip and fuse sheet are formed.Wherein, valve gap is the cylindrical body of an end opening, and the overflow hole that connects with inner chamber is radially arranged in middle appropriate location, and the opening end of valve gap is connected with valve body is removable.The centre of valve body has through hole vertically, and through hole is by big footpath section, and path section and type conical bench three parts that are positioned between the two constitute.Valve rod is a column, and an end has the taper bigger diameter end, is placed in the formed internal cavities of valve gap and valve body, and the taper bigger diameter end fits on the type conical bench of valve hole, and stage clip is nested with on valve rod, and fuse sheet fits on the conehead.During use, safety valve is connected with high temperature and high pressure containers, when temperature in the container meets or exceeds the temperature of setting, fuse sheet promptly melts, high temperature fluid just can be discharged from valve rod end and valve body matching part are flowed through the overflow hole of space from valve gap of valve rod and valve body and valve cover chamber, raises thereby reduce the pressure that causes because of fluid temperature (F.T.) is too high in the elevated temperature vessel.When the pressure in the container surpasses the force value of setting, high-pressure liquid will be valve rod jack-up, make the cooperation place of valve rod and valve body the slit occur, high-pressure liquid can flow out from this slit, discharges by the overflow hole on the valve gap, thus the pressure of reduction fluid, when pressure drops to the force value of setting, valve rod is pressed to valve body again under the effect of stage clip, make the slit closure.

Because the design's safety valve has the dual functions of pressure limiting and limit temperature, so the high pressure-temperature container only need be installed the purpose that a design's safety valve just can reach safe handling.The designed safety valve of the utility model is particularly useful for heat pipe electric heater, and device such as pressure kettle is gone up and used.

The structural representation of the limit temperature pressure-limiting safety valve that Fig. 1 designs for the utility model.

Fig. 2 is the structural drawing of valve gap among Fig. 1, and wherein a is a front view, and b is the A-A sectional view.

Fig. 3 is the structural drawing of valve body among Fig. 1, and wherein a is a front view, and b is a worm's eye view.

Fig. 4 is the structural drawing of valve rod among Fig. 1.

Below in conjunction with accompanying drawing, mode of execution of the present utility model and effect thereof are further described.

Fig. 1 is the structural drawing of the design's limit temperature pressure-limiting safety valve.Said safety valve is made up of valve gap 1, valve rod 2, valve body 3, stage clip 4 and fuse sheet 5.Valve gap is the cylindrical body of an end opening, and the most frequently used is cylindrical body (as shown in Figure 2), and radially there is the overflow hole 6 that connects with inner chamber the position therebetween.The opening end of valve gap 1 is removable the connection with valve body 3, and there is Sealing 7 centre in case the fluid stopping body leaks.Placement can be directly to be threaded, or the bolt connection by flange plate etc.What Fig. 1 provided is the simplest a kind of structure that directly is threaded.The axial interposition of valve body is equipped with through hole.It constitutes (see figure 3) by big footpath section, path section and type conical bench three parts between the two.Big footpath section and the receive valve stem of inner chamber formation of valve gap and the space of stage clip, the bottom of through hole is the path section, is communicated with the high temperature and high pressure containers of desiring to be used.One end of valve body 3 is connected with valve gap, and the other end is connected with high temperature and high pressure containers, and the simplest is to be threaded.Valve rod 2 is the cylindrical bar (as shown in Figure 4) of band taper bigger diameter end.Stage clip 4 is sleeved on the valve rod 2, and fuse sheet 5 fits on the conehead.The taper bigger diameter end of valve rod 2 just in time fits on the type conical bench of through hole of valve body 2, under the effect of stage clip 4, the hole of bottom path section is sealed up, the other end of valve rod 2 extend in the inner chamber of valve gap 1, valve rod between this top of valve rod 2 and inner chamber end an amount of space arranged, so that can move up under the high-pressure liquid effect.

The utility model has designed a kind of safety valve, its height overall is 27 millimeters, diameter is 10 millimeters, and stem diameter is 4 millimeters, and length is 25 millimeters, select commercially available 140 ℃ fuse sheet for use, with the Spring Steel Wire coiling bore of 0.5 millimeter of φ is 4 millimeters stage clip, makes the safety valve as Fig. 1 structure, and three radially equally distributed overflow holes are arranged on the valve gap, adopt screw-thread fit between valve gap and valve body, valve body and high temperature and high pressure containers also adopt screw-thread fit.After being installed to this safety valve on the heat pipe electric heater, when hydrodynamic pressure reaches 0.27MPa in the electric heater, valve rod 2 is promptly by fluid jack-up, make the taper bigger diameter end of valve rod leave the type conical bench of valve body and the slit occur, high-pressure liquid is this slit of flow path, discharge from the flow-off of valve gap, thereby the pressure in the reduction electric heater has guaranteed safe in utilization.After the fluid discharge was a certain amount of, when container inner pressure reached normal value, valve rod was pressed towards valve body again under the effect of stage clip power, make the slit closure, and high-pressure bottle promptly enters proper functioning.When the temperature in the electric heater reached more than 140 ℃, fuse sheet promptly melted, and made between the type conical bench of taper bigger diameter end and valve body the slit also to occur, and high temperature fluid also can overflow from valve.At this moment, must change fuse sheet, safety valve just can normally use.

According to the usage requirement of high temperature and high pressure containers, can select the fuse sheet of different temperatures and the stage clip of different parameters is arranged, stage clip is moved under the safety pressure value that requires.Therefore, the limit temperature pressure-limiting safety valve of the utility model design can be fit to the use of various high temperature and high pressure containers, as long as above-mentioned safety valve is installed, container just can be under the temperature and pressure of setting trouble free service.

Claims (2)

1, the warm pressure-limiting safety valve of a kind of limit, said safety valve comprises valve gap, valve body, fuse sheet is characterized in that:

[1] said limit temperature pressure-limiting safety valve also comprises valve rod, stage clip,

[2] said valve gap is that an end opening is worked as cylindrical body, the overflow hole that connects with inner chamber is radially arranged in middle appropriate location, the opening end of valve gap is connected with valve body is removable, the centre of said valve body has through hole vertically, through hole is by big footpath section, path section and type conical bench three parts that are positioned between the two constitute, said valve rod is a column, the one end has the taper bigger diameter end, be placed in the formed internal cavities of valve gap and valve body, the taper bigger diameter end fits on the type conical bench of valve hole, said stage clip encapsulation is put on valve rod, and said fuse sheet fits on the conehead.

2, as the said safety valve of claim 1, it is characterized in that: being connected to of said valve body and valve cover chamber is threaded.

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