CN208967045U - Dynamic equilibrium thermostatic radiator valve - Google Patents

Abstract

The utility model relates to a kind of dynamic equilibrium thermostatic radiator valves, mainly it is made of valve body and temperature control valve head, the temperature control valve head is mounted on the upper surface of described valve body, valve seat is equipped in the valve body, the valve seat is horizontally disposed, between the cavity of resorption and epicoele of the valve body, it is described intracavitary equipped with the flap for forming valve seal pair together with the valve seat, the flap is mounted on the lower end of valve rod, the temperature control valve head is equipped with the regulation handle of adjusting, thermometer bulb is equipped in the temperature control valve head, the thermometer bulb is connect with the upper end of the valve rod, it is intracavitary under described to increase and the dynamic regulation fuse of increase equipped with resistance with pressure difference, the dynamic regulation fuse is equipped with fuse import and fuse exports, the fuse inlet communication is located at cavity of resorption and/or snout cavity outside it, the center through hole of valve seat described in the fuse outlet.The utility model can automatically adjust rate-of flow according to environment temperature, additionally it is possible to keep stability of flow in the variation of in-out end pressure difference.

Description

Dynamic equilibrium thermostatic radiator valve

Technical field

The utility model relates to a kind of dynamic equilibrium thermostatic radiator valves.

Background technique

Existing thermostatic radiator valve is mainly made of valve body and temperature control valve head, and the valve body is equipped with Jie of connection both ends inlet and outlet Matter channel, the medium channel is interior to be equipped with valve seat, and the valve seat can be usually horizontally disposed with, and center through hole constitutes medium channel Necessary place, the top of the valve seat is equipped with flap, and the flap connects valve rod, drives it to move up and down by valve rod, with reality Unlatching, closing and the aperture for adjusting valve of existing valve seal pair, for heating heating system or other domestic water systems, institute State flap and generally include hard (metal) flap seat and the rubber gasket being inlaid on flap seat and constitute, when rubber gasket with After the sealing face contact and compression of valve seat, that is, realize the closing of valve, when rubber gasket is far from valve seat, medium is able to from valve Gap between seat and rubber gasket passes through, valve opening, and the spacing between sealing surface of seat and rubber gasket embodies The aperture of valve decides the area of passage and resistance of sealing vice division chief, and then influences the flow of valve, and temperature control valve head is mounted on The top of valve body, the interior thermometer bulb varied with temperature equipped with volume or axial dimension of temperature control valve head, the upper end of valve rod and thermometer bulb are direct Or connected by connection component, when thermometer bulb is when the temperature drops, the axial dimension of thermometer bulb reduces, valve rod is in precommpression thrust spring Under the action of move up, drive flap move up, increase the aperture of valve.Increased flow capacity, after the temperature of thermometer bulb rises, Axial dimension becomes larger, and valve rod is pushed up downwards, and flap is moved down with flap, so that valve opening reduces, rate-of flow decline will be this Valve is used for the heat medium pipeline of heating system, increases heating amount after capable of dropping at room temperature, and room temperature reduces heating after increasing Amount, the automatic constant-temperature for being achieved in room temperature are adjusted.But rate-of flow not only changes with the variation of valve opening, but also Dependent on the pressure difference at pressure medium valve inlet and outlet both ends in other words, after heating system increases for warm pressure, identical Valve opening under, heating amount will increase, and when the heating pressure reduction of heating system, in identical valve opening Under, heating amount will reduce, and thus lead to the variation in the identical amount of heating at room temperature, and then influence the thermostatic control effect of room temperature Fruit.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of dynamic equilibrium thermostatic radiator valve, this valve is not Can only automatically adjust rate-of flow according to environment temperature, but also can in the case where in-out end pressure difference changes still base Stability of flow is kept on this.

The technical solution of the utility model is: a kind of dynamic equilibrium thermostatic radiator valve, mainly by valve body and temperature control valve head group At the temperature control valve head is mounted on the upper surface of described valve body, and valve seat is equipped in the valve body, and the valve seat is horizontally disposed, is located at It is described intracavitary to be equipped with equipped with the center through hole for being connected to the cavity of resorption and epicoele between the cavity of resorption and epicoele of the valve body The flap of valve seal pair is formed together with the valve seat, the flap is mounted on the lower end of valve rod, sets in the temperature control valve head There is thermometer bulb, the thermometer bulb is connect with the upper end of the valve rod, intracavitary under described to increase dynamic equipped with resistance with pressure difference increase State adjusts fuse, and the dynamic regulation fuse is equipped with fuse import and fuse and exports and be connected to the fuse import and fuse goes out Medium channel in the fuse of mouth, the fuse inlet communication are located at cavity of resorption and/or snout cavity outside it, and the fuse outlet connects Lead to the center through hole of the valve seat.

The dynamic regulation fuse may include fuse shell, and the side of the preferably fuse shell is arranged in the fuse import Face, quantity are one or more, and the fuse outlet is preferably provided at the top of the fuse shell, are set in the cartridge shell body There is the floating cylinder that can be moved up and down, the bottom of the floating cylinder can be equipped with piston type pedestal, the piston type pedestal Outer rim and the inner wall glade plane space of the fuse shell cooperate, the fuse import is located at the behaviour area of the piston type pedestal The top in domain is additionally provided with the second import on the fuse shell, and second import is located at the behaviour area of the piston type pedestal The lower section in domain.

The top of the piston type pedestal can be equipped with or be not provided with thrust spring, the lower section of the piston type pedestal It can be equipped with or be not provided with tension spring.

The thrust spring and tension spring can use helical spring, the screw type thrust spring be equipped with or It is not provided with precommpression, the helical spring is cylindrical helical spring or Reducing screw spring.

The fuse shell can be made of fuse pedestal and fuse upper cover, and the fuse upper cover is preferably in down cup-shaped, outside Shape is cylindricality, and lower end links together with the fuse pedestal.

The top surface blind hole extended axially downward, the side of the top surface blind hole are preferably provided in the middle part of the top surface of the fuse pedestal Wall is in short tube shape, and internal diameter is preferably smaller than the outer diameter of the piston type pedestal, keeps off below the piston type pedestal, constitutes and lives Plug pedestal position limiting structure.

Can be equipped with inlet short pipe on the side wall of the top surface blind hole, the pore of the inlet short pipe constitute described second into Mouthful, it is connected to the top surface blind hole.

The lateral surface of the piston type pedestal can be equipped with one layer of annular flange, be preferably provided at least upper layer and lower layer convex annular Edge, the outer rim of each layer annular flange and the inner wall glade plane space of the fuse shell cooperate.

Several vertical blend stops extended downwardly, each vertical gear are preferably provided on the bottom surface of the top plate of the fuse upper cover Item is distributed on the same cylinder, and there are spacing between adjacent vertical blend stop.

The center through hole and the floating of the cylinder, fuse outlet, the valve seat where each vertical blend stop The axis of cylinder and the piston type pedestal is preferably placed in same vertical line.

The outer diameter of cylinder where each vertical blend stop can be less than the internal diameter of the floating cylinder, alternatively, each described The internal diameter of cylinder where vertical blend stop is greater than the outer diameter of the floating cylinder.

When the top of the piston type pedestal is equipped with thrust spring, the upper surface of the piston type pedestal is preferably provided with lower bullet Spring positioning seat, the structure that the lower spring positioning seat uses middle part to raise upward, the lower end of the thrust spring is set in described On lower spring positioning seat, the upper end of the thrust spring is preferably set on upper spring positioning seat, and the upper spring positioning seat is in Downwardly convex bowl-shape in middle part, edge is planar in a ring, and the thrust spring is preferably pretensioned spring, it is described on The upper surface of the annular flat planar edge of spring positioning seat is resisted against the lower end of each blend stop.

The height of projection of the lower spring positioning seat and upper spring positioning seat can be determined using following manner: under described After spring positioning seat and upper spring positioning seat contact with each other, between the upper end of the floating cylinder and the top plate of the fuse upper cover Still there is a gap.

The bottom of the valve body can be equipped with body base through-hole, and the fuse shell is preferably mounted at the body base Be equipped with sealing material on through-hole and between the valve body, the bottom end exposed surface of the fuse shell preferably with the valve body bottom Show outside valve body around portion's through-hole concordant.

The beneficial effects of the utility model are: dynamic regulation fuse is provided with due to intracavitary under, when the two of the valve When end pressure difference becomes larger, the resistance of the dynamic regulation fuse increases, after valve pressure at two ends difference becomes smaller, dynamic regulation fuse Resistance reduce, thus substantially counteract valve pressure at two ends difference and change influence to rate-of flow, substantially avoid because Rate-of flow caused by the pressure at two ends difference of valve changes or the variation of heating amount, are conducive to the stabilization for maintaining flow, make heating amount Only change with room temperature and changes.

Detailed description of the invention

Fig. 1 is the organigram of the utility model；

Fig. 2 is a kind of organigram of dynamic regulation fuse of the utility model；

Fig. 3 is the assembling schematic diagram of dynamic regulation fuse described in Fig. 2.

Specific embodiment

The utility model is described further with reference to the accompanying drawing.

As shown in Figure 1-3, the utility model provides a kind of dynamic equilibrium thermostatic radiator valve, mainly by valve body 30 and control Warm valve head 10 forms, and the temperature control valve head is mounted on the upper surface of described valve body, is equipped with valve seat 23 in the valve body, in the valve body Cavity be followed successively by the snout cavity positioned at inlet side, the cavity of resorption below the valve seat, the epicoele above the valve seat And the outlet plenum positioned at outlet side, the cavity of resorption are linked together with the snout cavity, the epicoele is linked as with the outlet plenum One forms the medium channel 31 being made of snout cavity, cavity of resorption, epicoele and outlet plenum, and the valve seat is horizontally disposed, is located at described Between cavity of resorption and epicoele, the valve seat is equipped with center through hole for being connected to the cavity of resorption and epicoele, it is described it is it is intracavitary be equipped with The valve seat forms the flap 22 of valve seal pair together, and the flap is mounted on the lower end of valve rod 21, in the temperature control valve head Equipped with thermometer bulb 11, the thermometer bulb is connect with the upper end of the valve rod, under described it is intracavitary be equipped with resistance (to the resistance of medium flow field) with Pressure difference increase and increase dynamic regulation fuse 40, the dynamic regulation fuse be equipped with fuse import 45 and fuse outlet 48 with And it is connected to medium channel in the fuse of the fuse import and fuse outlet, the fuse inlet communication is located at the cavity of resorption outside it And/or snout cavity.The center through hole of valve seat described in the fuse outlet.Medium channel constitutes in the fuse as a result, Necessary medium channel or main medium channel, the resistance of valve for being connected to the center through hole of snout cavity and valve seat are mainly close by valve The resistance composition for sealing secondary resistance and dynamic regulation fuse increases dynamic and adjusts when the poor timing of the pressure medium at valve disengaging both ends The resistance for saving fuse will reduce the pressure difference of the secondary disengaging two sides of valve seal, when the pressure medium difference variation at valve disengaging both ends When, the resistance synchronous backward of dynamic regulation fuse changes and amplitude of variation is suitable for, so that it may valve seal pair be kept to pass in and out two sides Pressure difference it is constant, keep flow velocity it is constant.

The connection side of connection type and the thermometer bulb in the temperature control valve head between the thermometer bulb and the valve rod Formula etc. can be using the suitable prior art.

In general, can be equipped with the handle 12 for adjusting or setting valve opening on the temperature control valve head, the handle can With using the prior art of any suitable, for example, the handle of cup-shaped perhaps handwheel or rod-shaped handle, can also pass through Handle is arranged in any other suitable mode, or is not provided with handle or electronic mode is arranged again adjusts while being equipped with handle Device is acted by motor drive associated mechanisms.

Exceptional space is substantially not take up using the handle of falling cup-shaped, facilitates installation and maintenance, and uses electronic especially electricity Dynamic electric-controlled type regulating device, then can be adjusted by mobile phone or dedicated remote control etc..

When be equipped with manually adjust handle when, rotating handle can manual adjustment thermometer bulb position, be achieved in corresponding Under the conditions of (mainly ambient temperature conditions) valve opening, after valve opening is set, how the variation of ambient temperature of valve , the valve rod of that is, temperature change of thermometer bulb, valve will change with the axial dimension of thermometer bulb and be moved up and down, and realize valve Aperture according to environment temperature automatic adjustment.

Told dynamic regulation fuse may be typically located at and be full of the entirely or essentially space of the cavity of resorption, in the fuse Medium channel constitutes the medium channel of the intracavitary corresponding region under.

The dynamic regulation fuse can use the prior art or other appropriate technologies of any suitable.If for example, being equipped with Dry pore uses porous material, after the pressure difference at valve disengaging both ends increases, flows through related pore or porous material Velocity of medium will increase, and the increase of flow velocity will bring the increase of resistance, thus limit the increase of flow velocity to a certain extent. It for another example, can be using various forms of especially easy constant current valve arrangements, to realize the perseverance when passing in and out the variation of two sides pressure difference Flow control.

Referring to figs. 2 and 3, the dynamic regulation fuse may include fuse shell, and the core is arranged in the fuse import The side of sub- shell, quantity are one or more, and the top of the fuse shell, the cartridge shell is arranged in the fuse outlet It is equipped with the floating cylinder 52 that can be moved up and down in vivo, between the lateral surface of the floating cylinder and the inner wall of the fuse shell There are gaps, and to allow the floating cylinder to move up and down, the bottom of the floating cylinder is equipped with piston type pedestal, the piston The inner wall glade plane space of the outer rim of formula pedestal and the fuse shell cooperates, fit system it is similar with it is normal used in other equipment Piston is advised, can be realized mobile while being sealed, but in view of the purpose of this utility model and requirement, it is not necessary to it is stringent sealing, Certain medium flow field is allowed to cross the gap between piston type pedestal and floating cylinder inboard wall, as long as not influencing piston type pedestal or more two Just, fuse import described in sealing performance is located at the top of the zone of action of the piston type pedestal to the pressure difference of side, as a result, The medium for entering the fuse shell through fuse import can be from the top of the floating cylinder and the top plate of the fuse shell Between gap pass through, flow through the top exit of the fuse shell, and then the center through hole for flowing through the valve seat enters epicoele, The second import is additionally provided on the fuse shell, second import is located at the lower section of the zone of action of the piston type pedestal, Enter the intracorporal medium of the cartridge shell from the second import and enter the space below the piston type pedestal, by the piston type bottom Seat stop cannot or cannot substantially flow upwards out, the medium below piston type pedestal to the piston type pedestal impose to On pressure, the medium above piston type pedestal imposes downward pressure, the piston type bottom to the piston type pedestal There is between the medium of two sides certain pressure difference above and below seat, when lower section pressure medium is greater than upper dielectric pressure, will float Cylinder pushes up, and pressure difference is bigger, and thrust (the upward resultant force in direction) is bigger.

Thrust spring 53 can be set in the top of the piston type pedestal, thrust spring can also be not provided with.It is described to push away Power spring can usually use helical spring, needed according to control and use occasion, the screw type thrust spring can be set Have or be not provided with precommpression, when floating cylinder increase and when compressing thrust spring, thrust spring to piston type pedestal apply to Under thrust.

Purpose identical with thrust spring can also be arranged tension spring in the lower section of the piston type pedestal, specifically set The mode of setting can be according to the prior art, for example, the tension spring uses helical spring, upper end connects the piston type pedestal, Lower end connects the bottom plate of the fuse shell, and when floating cylinder increases when stretching tension spring, tension spring is to piston type bottom Seat applies downward pulling force.

Thrust spring and tension spring can be arranged simultaneously, one of or both of which can also only be arranged and be not provided with.

It is such as equipped with thrust spring, the pressure difference of two sides is greater than the gravity of the floating cylinder above and below the piston type pedestal When with thrust spring resistance (and resistance of motion in medium etc., if needing to be included in practice), floating cylinder is pushed It moves up, the pressure difference of two sides is downward less than the gravity and thrust spring of floating cylinder above and below the piston type pedestal pushes away When power, then the cylinder that floats moves down.Due to the pressure of the pressure difference of two sides above and below piston type pedestal and valve inlet and outlet both ends Difference is positively correlated, and therefore, when the pressure difference at valve inlet and outlet both ends increases, floating cylinder rises, the top of the floating cylinder Gap shrinks between the top plate of fuse shell increase the resistance of media flow, when the pressure difference at valve inlet and outlet both ends When reduction, floating cylinder decline, the gap between the top of the floating cylinder and the top plate of fuse shell increases, to medium flow field Dynamic resistance reduces, it is thus achieved that valve overall resistance with the reversed adjusting of pressure difference, and then reduce or avoid because of valve The pressure difference for importing and exporting both ends changes caused rate-of flow variation, selects the suitable size and thrust bullet of each part and relative position The coefficient of elasticity of spring, the amplitude that adjustable fuse drag size changes with valve pressure at two ends difference, so that fuse resistance Variation offset valve pressure at two ends difference just or substantially and change influence to flow, keep flow in stabilization.

The helical spring can be cylindrical helical spring or Reducing screw spring, to obtain under corresponding compression degree Required elastic force, and then required fuse resistance and required flow are obtained, it can also be using any other prior art in phase Required elastic force is obtained under the compression degree answered.

The piston type pedestal limit for limiting the piston type pedestal extreme lower position can be set in the cartridge shell body Structure, this position limiting structure can use the form of any suitable, for example, being arranged on the inner wall of fuse shell radially-inwardly convex The convex block risen makes the piston type pedestal all cannot under any state by limiting the extreme lower position of the piston type pedestal Be in contact with the bottom plate of the fuse shell, at least maintain a minimum spacing between the two, thereby ensure that from second into The medium that mouth enters fuse shell is able to enter the space between the piston type pedestal and the bottom plate of floating cylinder, restores static pressure And it imposes and upwards pressure to the piston type pedestal.

The fuse shell can be made of fuse pedestal 42 and fuse upper cover 46, and the fuse upper cover is in cup-shaped, outside Shape is cylindricality, and lower end links together with the fuse pedestal.

The connection type of the fuse upper cover and the fuse pedestal can be with are as follows: the top of the fuse pedestal is top cap Socket part, the shape of the upper cover interconnecting piece are in the cylindricality upwardly extended, in the lower port of fuse upper cover described in grafting, the fuse The medial surface of the lower port of upper cover is preferably provided with the annular tongue and groove for upper cover interconnecting piece described in grafting.

The top surface blind hole 44 extended axially downward, the side wall of the top surface blind hole are equipped in the middle part of the top surface of the fuse pedestal In short tube shape, internal diameter is less than the outer diameter of the piston type pedestal, keeps off below the piston type pedestal, constitutes the piston Formula pedestal position limiting structure.

Inlet short pipe can be equipped on the side wall of the top surface blind hole, the pore 41 of the inlet short pipe constitutes described second Import is connected to the top surface blind hole, and the outer end face of the inlet short pipe is preferably concordant with the lateral surface of the fuse upper cover, phase Ying Di, the bottom of the fuse upper cover are equipped with the notch for accommodating the short tube, and the top surface blind hole constitutes the work as a result, Space in minimum shell below plug pedestal.

The lateral surface of the piston type pedestal is preferably provided at least upper layer and lower layer annular flange, each layer annular flange The inner wall glade plane space of outer rim and the fuse shell cooperates, in favor of the stabilization of the floating cylinder.

The bottom surface of the top plate of the fuse upper cover is equipped with several vertical blend stops 47 extended downwardly, each vertical blend stop It is preferably distributed on the same cylinder, there are spacing 49 between adjacent vertical blend stop, these spacing are for constituting across corresponding column The medium channel in face.

The center through hole and the floating of the cylinder, fuse outlet, the valve seat where each vertical blend stop The axis of cylinder and the piston type pedestal is preferably placed in same vertical line, the cylinder where each vertical blend stop Outer diameter can be less than the internal diameter of the floating cylinder, alternatively, the internal diameter of the cylinder where each vertical blend stop is greater than institute State the outer diameter of floating cylinder, thus the floating cylinder can cover each vertical blend stop outside or be inserted in each vertical blend stop and enclose At cylindricality inside, the medium flowed through from floating cylinder over top needs guiding through the gap between vertical blend stop, it is possible thereby to drop Low discharge reduces sensitivity of the flow to floating cylinder height, and then facilitate flow tune with the change intensity of floating cylinder height Section reduces the requirement to each associated part accurate to dimension and relative positional accuracy, mentions high control precision.

Floating body through-hole 55 can be equipped on the side wall of the floating cylinder, the pressure for holding cylinder inside and outside is equal, and Pressure medium in cylinder will not be influenced because of the resistance at other positions.

When the top of the piston type pedestal is equipped with thrust spring, the upper surface of the piston type pedestal can be equipped with lower bullet Spring positioning seat 54, the structure that the lower spring positioning seat uses middle part to raise upward, the lower end of the thrust spring is set in institute It states on lower spring positioning seat, the upper end of the thrust spring is set on upper spring positioning seat 51, and the upper spring positioning seat is in Downwardly convex bowl-shape in middle part, edge is planar in a ring, and the thrust spring is pretensioned spring, in spring force Under effect, the upper surface of the annular flat planar edge of the upper spring positioning seat is resisted against the lower end of each blend stop.By It can make to float only after the pressure difference at valve both ends reaches a certain level in being provided with precommpression to thrust spring Cylinder moves up, and mobile range is bigger, and the downward thrust of thrust spring is bigger, can pass through the preload of setting thrust spring Power, coefficient of elasticity and length and screw pitch etc., the threshold pressure difference that control floating cylinder is begun to move up, and control The upper pan position of floating cylinder under certain pressure difference.

The height of projection (raised axial dimension) of the lower spring positioning seat and upper spring positioning seat uses following manner It determines: after the lower spring positioning seat and upper spring positioning seat contact with each other, the upper end of the floating cylinder and the fuse Still there is a gap (minimum clearance) between the top plate of upper cover, is closed to avoid ambassador's valve is crossed because of pressure difference.

The bottom of the valve body, which is equipped with, to be mounted on the body base through-hole with body base through-hole, the fuse shell Above and between the valve body it is equipped with sealing material 43, the bottom end exposed surface of the fuse shell and the body base through-hole Show outside the valve body of surrounding concordant.

For example, the body base through-hole is screw hole, the lateral surface of the fuse pedestal is equipped with external screw thread, is screwed in described On body base through-hole, sealing ring is equipped between the fuse pedestal and the valve body.

The bottom of the valve body can be equipped with body base through-hole, for installing the dynamic regulation fuse.For example, described Body base through-hole can be screw hole, and the lateral surface of the fuse pedestal is equipped with external screw thread, is screwed in the body base through-hole On, sealing ring can be equipped between the fuse pedestal and the valve body, it is logical that the sealing ring is preferably placed at the body base The external port position in hole can process the annular groove for being embedded in the sealing ring on the fuse pedestal of corresponding site.

It is disclosed by the utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill Art means are that further limiting for another technological means is outer, can form several different technical solutions in any combination.

Claims (13)

1. a kind of dynamic equilibrium thermostatic radiator valve, is mainly made of valve body and temperature control valve head, the temperature control valve head is mounted on described The upper surface of valve body, it is characterised in that valve seat is equipped in the valve body, the valve seat is horizontally disposed, positioned at the valve body cavity of resorption and It is described intracavitary equipped with the group together with the valve seat equipped with the center through hole for being connected to the cavity of resorption and epicoele between epicoele At the flap of valve seal pair, the flap is mounted on the lower end of valve rod, is equipped with thermometer bulb in the temperature control valve head, the thermometer bulb with The upper end of the valve rod connects, intracavitary under described to increase and the dynamic regulation fuse of increase equipped with resistance with pressure difference, described dynamic State adjusts medium in the fuse that fuse is equipped with fuse import and fuse exports and be connected to the fuse import and fuse exports and leads to Road, the fuse inlet communication are located at cavity of resorption and/or snout cavity outside it, the center of valve seat described in the fuse outlet Through-hole.

2. central heating valve as described in claim 1, it is characterised in that the dynamic regulation fuse includes fuse shell, the fuse The side of the fuse shell is arranged in import, and quantity is one or more, and the fuse shell is arranged in the fuse outlet Top, the cartridge shell body is interior to be equipped with the floating cylinder that can be moved up and down, and the bottom of the floating cylinder is equipped with piston type bottom The inner wall glade plane space of seat, the outer rim of the piston type pedestal and the fuse shell cooperates, and the fuse import is located at described The top of the zone of action of piston type pedestal, the second import is additionally provided on the fuse shell, and second import is located at described The lower section of the zone of action of piston type pedestal.

3. central heating valve as claimed in claim 2, it is characterised in that be provided with or without and push away above the piston type pedestal Power spring, tension spring is provided with or without below the piston type pedestal, and the thrust spring uses helical spring, spiral shell The rotating thrust spring is provided with or without precommpression, and the helical spring is cylindrical helical spring or Reducing screw bullet Spring.

4. central heating valve as claimed in claim 3, it is characterised in that the fuse shell is made of fuse pedestal and fuse upper cover, The fuse upper cover is in cup-shaped, and shape is cylindricality, and lower end links together with the fuse pedestal.

5. central heating valve as claimed in claim 4, it is characterised in that be equipped in the middle part of the top surface of the fuse pedestal and axially downwardly prolong The top surface blind hole stretched, the side wall of the top surface blind hole are in short tube shape, and internal diameter is less than the outer diameter of the piston type pedestal, are kept off in institute It states below piston type pedestal, constitutes piston type pedestal position limiting structure, the side wall of the top surface blind hole is equipped with inlet short pipe, institute The pore for stating inlet short pipe constitutes second import, is connected to the top surface blind hole.

6. central heating valve as claimed in claim 2, it is characterised in that the lateral surface of the piston type pedestal is equipped with two above and below at least Layer annular flange, the outer rim of each layer annular flange and the inner wall glade plane space of the fuse shell cooperate.

7. the central heating valve as described in claim 2-6 is any, it is characterised in that the bottom surface of the top plate of the fuse upper cover is equipped with Several vertical blend stops extended downwardly, each vertical blend stop are distributed on the same cylinder, between adjacent vertical blend stop there are Spacing, the cylinder, fuse outlet, the center through hole of the valve seat and the floating cylinder where each vertical blend stop It is located in same vertical line with the axis of the piston type pedestal, the outer diameter of the cylinder where each vertical blend stop is less than described The internal diameter of cylinder where the internal diameter of floating cylinder or each vertical blend stop is greater than the outer diameter of the floating cylinder.

8. central heating valve as claimed in claim 7, it is characterised in that when the top of the piston type pedestal is equipped with thrust spring, institute The structure that the upper surface of piston type pedestal uses middle part to raise upward equipped with lower spring positioning seat, the lower spring positioning seat is stated, The lower end of the thrust spring is set on the lower spring positioning seat, and the upper end of the thrust spring is set in upper spring positioning On seat, the upper spring positioning seat is in downwardly convex bowl-shape in middle part, and edge is planar in a ring, the thrust spring Upper surface for pretensioned spring, the annular flat planar edge of the upper spring positioning seat is resisted against under each blend stop End.

9. central heating valve as claimed in claim 8, it is characterised in that the protrusion of lower the spring positioning seat and upper spring positioning seat Height is determined using following manner: after the lower spring positioning seat and upper spring positioning seat contact with each other, the floating cylinder Upper end and the fuse upper cover top plate between still have a gap.

10. the central heating valve as described in claim 2-6 is any, it is characterised in that the bottom of the valve body is logical equipped with body base Hole, the fuse shell are mounted on the body base through-hole and are equipped with sealing material, the fuse between the valve body Show outside the bottom end exposed surface of shell and the valve body around the body base through-hole concordant.

11. central heating valve as claimed in claim 7, it is characterised in that the bottom of the valve body is equipped with body base through-hole, described Fuse shell is mounted on the body base through-hole and is equipped with sealing material, the bottom of the fuse shell between the valve body Show outside end exposed surface and the valve body around the body base through-hole concordant.

12. central heating valve as claimed in claim 8, it is characterised in that the bottom of the valve body is equipped with body base through-hole, described Fuse shell is mounted on the body base through-hole and is equipped with sealing material, the bottom of the fuse shell between the valve body Show outside end exposed surface and the valve body around the body base through-hole concordant.

13. central heating valve as claimed in claim 9, it is characterised in that the bottom of the valve body is equipped with body base through-hole, described Fuse shell is mounted on the body base through-hole and is equipped with sealing material, the bottom of the fuse shell between the valve body Show outside end exposed surface and the valve body around the body base through-hole concordant.