CN203309224U - Anti-freezing check valve - Google Patents

Abstract

The utility model relates to an anti-freezing check valve which comprises a pipe body, a valve element and a valve switch, wherein the valve element comprises a valve element assembly, a central spindle, an upper central spindle and a valve element body, the valve element body comprises a water inlet, a water outlet, a cavity, a check cover and a driving part, the valve element assembly is located in the cavity, one end of the central spindle is matched with the valve element assembly, the other end of the central spindle protrudes out of the valve element body and is movably connected with the check cover in a sleeved mode, the check cover corresponds to the water outlet, one end of the driving part is fixed, and the other end of the driving part is connected with the check cover to drive the check cover to cover the water outlet. According to the anti-freezing check valve, the check cover is connected to the outer side of the central spindle in a sliding and sleeved mode, radial limiting of the sliding of the check cover is achieved by the central spindle, and therefore the check cover is prevented from being stuck due to radial deflection; relative sliding of the check cover and the central spindle enables incrustation on the central spindle and on the check cover to be scraped, so that the automatic incrustation removing function is achieved, and the stuck failure rate is further reduced; the check cover and the water outlet are located on the same axial direction, surface contact and cover sealing exist between the check cover and the water outlet, and therefore the check sealing effect is better.

Description

A kind of non-return antifreezing valve

Technical field

The utility model relates to a kind of valve, particularly a kind of non-return antifreezing valve.

Background technique

Valve is widely used in fluid delivery system, is the controlling component of controlling flow of fluid, has cut-off, adjusting, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief.Application is very extensive.The valve kind is also varied.

Wherein, for the valve that prevents adverse current, its core is the valve core device part in valve.It is the key that realizes fluid non-return.In prior art, the non-return sealing cover of non-return most employing and gasket seal, structure at the driving lower seal water outlet of spring, but the appearance of the situations such as stuck, poor sealing, build-up of limescale be stuck that exist radial deflection to slide, and being subjected to the whole valve size of structure influence larger, application is limited etc.

The patent No. as State Intellectual Property Office's notice of authorization in 2002 is in the utility model patent of " 01276666.6 ", discloses a kind of safety check of single current with double-deck spool.Valve rod 3 slides in guide pipe 1, front end connected double-layer spool 5, and every layer of hoop of double-deck spool 5 has seal ring, by spring 4 actuate valve stem 3 that are socketed, double-deck spool 5 entered in water outlet, by the structure of wedge shape and the seal ring of every layer, water outlet sealed.In this scheme, valve rod 3 is enclosed within guide pipe 1, and the shift motion of valve rod 3 is longer, and long-time the use can produce incrustation scale because of long-term ponding in guide pipe 1, is easy to make valve rod 3 because build-up of limescale is stuck, can't move in guide pipe 1, loses inverse-stopping functions.Produce serious consequence.Even if the initial stage does not have build-up of limescale, also because the stroke of valve rod 3 is long, in case skew (producing radial deflection etc. such as the impact that is subjected to current) radially occurs, will block and can't move.In addition, double-deck spool 5 closely pushes and realizes sealing by seal ring and water outlet, is the sealing means of a contact, in case hydraulic pressure is excessive or service time long rubber ring aging, some contact sealing just is easy to break through at certain point, enlarges gradually.Thirdly, owing to will being equipped with the structures such as the guide pipe 1 that slides mutually with valve rod 3 and depression bar 10, the volume of whole valve is excessive, and application place and field are restricted, particularly valve through walls.Also increase the manufactured materials cost.

The model utility content

In order to overcome above-mentioned defect and the deficiency of prior art, the utility model provides a kind of non-return antifreezing valve.

A kind of non-return antifreezing valve described in the utility model, comprise body, be installed on the spool in described body, control the valve switch that described spool is opened or closed, between described spool and described inboard wall of tube body, be formed with the runner that current are logical, described runner is communicated with described body drain opening, described spool comprises controls the mangetic core assembly that current are logical, drive the mandrel that described mangetic core assembly is opened or closed, the upper mandrel be connected with mandrel, and spool body, described spool body comprises water intake, water outlet, with the cavity that is communicated with described water intake and water outlet, also comprise non-return lid, with the actuator that drives described non-return lid activity, described mangetic core assembly is arranged in described cavity, one end of described mandrel matches with described mangetic core assembly, the other end stretch out described spool body and with described non-return lid pivot bush unit, and its end is connected with described upper mandrel, described non-return lid is corresponding with described water outlet, one end of described actuator is fixed, the other end is connected the described non-return lid of driving and is placed on described water outlet with described non-return lid, the length that described mandrel stretches out described spool body is greater than the length of described non-return lid.

Preferably, described non-return lid and described mandrel are slidably socketed, and described mandrel also is socketed with gasket seal, and described gasket seal is between described non-return lid and described water outlet.

Preferably, the sidewall of described non-return lid have the first draining scale removal groove and/or the described mandrel body that socket-connects with described non-return lid on have the second draining scale removal groove.

Preferably, the inwall of described non-return lid is provided with the first draining scale removal fin and/or is provided with the second draining scale removal fin with the described mandrel body that described non-return lid socket-connects.

Preferably, described actuator is spring, described spring and the socket of described mandrel.

Preferably, described water outlet is positioned at described non-return lid in axial sliding on direction, and described non-return lid is placed on described water outlet.

Preferably, described spool body comprises spool cock and valve core housing, and described spool cock and valve core housing mutually are tightly connected and form described cavity, and described spool cock is provided with described water intake, and the end of described valve core housing is provided with described water outlet.

Preferably, described water intake is positioned at a side of described mangetic core assembly, described mandrel and be positioned at the opposite side of described mangetic core assembly with the non-return lid of described mandrel socket.

Preferably, described water outlet is a plurality of, and a plurality of described water outlets circumferentially.

Preferably, described mangetic core assembly comprises ceramic valve core fixed plate and ceramic valve core movable plate, one end of described mandrel connects the described ceramic valve core movable plate of driving with described ceramic valve core movable plate and rotates relative to described ceramic valve core fixed plate, and described ceramic valve core fixed plate is fixed in described valve core housing.

The beneficial effect that the non-return antifreezing valve that the utility model provides brings: the other end of (1) mandrel stretches out the spool body and is slidably socketed with non-return lid, non-return lid is enclosed within the outside of mandrel, along mandrel, sliding, be different from existing scheme, is all the inside that is placed in mandrel or guide pipe.Due to non-return lid, be enclosed within the outside of mandrel, whole sliding stroke slides along the body of mandrel all the time, the mandrel body plays the effect that prevents non-return lid radial deflection in whole sliding stroke, especially in the situation that water impact, not there will be because of the stuck irremovable situation of non-return lid radial deflection, rate of fault is lower.(2) because non-return lid is enclosed within the mandrel outside, in the process moved back and forth, the effect of self-cleaning incrustation scale can be played by the mandrel sidewall because the incrustation scale that long-term ponding produces strikes off in the end of non-return lid, further reduces stuck rate of fault.In addition, in the time of for further raising descale effect, realize drain function, on the position that non-return lid and/or mandrel and non-return lid socket-connect, open the first draining scale removal groove and the second draining scale removal groove, in the process of sliding, ponding is from discharging draining scale removal groove, and can swipe and pile up in the edge of draining scale removal groove in sliding process incrustation scale, make the incrustation scale of wiping off get rid of with water, plays the effect of draining scale removal.The long-term build-up of limescale of using is few, failure rate is low.The technical problem that has solved the medium-term and long-term existence of existing scheme but can't effectively solve always.(3) because of the mandrel the other end, stretch out the spool body, and be socketed with non-return lid, the axial direction that non-return cover rim mandrel slides, and water outlet is positioned at the end of valve core housing and is on the axial direction of non-return lid, whole non-return structure mutual socket in the axial direction and axial correspondence just cover and can be completely achieved.Do not take radial space, make whole valve on radial space, greatly reduce size, structure is ingenious, and materials are few, and cost is by low.(4) non-return lid of the present utility model is corresponding with water outlet in the axial direction, is directly covering on water outlet under the leaning of spring.Non-return lid forms with water outlet the face covered and contacts sealing.In addition, on mandrel, be socketed in addition gasket seal, between non-return lid and water outlet, while covering, non-return caping means of press seals pad together is covered on water outlet, and sealing effect is better.Compare the sealing of a contact, sealing effect is better.Not there will be the leakage of certain point.And after valve open, the resistance that water backs down non-return lid by the water outlet outflow is little, compare the dot encapsulation structure of wedge slot, more go deep into wedge slot, lateral extrusion power is larger, after valve open, the current of water outlet not only will overcome the elastic force of spring, also to overcome the resistance of lateral extrusion, back down resistance larger, may occur normally opening the situation of water outlet.(5) water intake 26 is positioned at a side of mangetic core assembly, mandrel and non-return lid are positioned at the opposite side of mangetic core assembly, mangetic core assembly has cut off contacting of water intake and mandrel and non-return lid, and without any the miscellaneous part setting, the zone between mangetic core assembly and water intake is not sealed under non-return state between mangetic core assembly and water intake.When water intake is cut off the water, after non-return lid was non-return, mangetic core assembly partition water intake was connected with mandrel and non-return lid, can not form confined space between water intake and mandrel component, and ponding is able to be discharged by water intake, and the cavity inside of spool body does not produce ponding.Cold area in the winter time, valve core device inside can be because ponding freezes, can be because ponding freezes yet, and volumetric expansion squeeze and destroy mandrel and non-return lid.

The accompanying drawing explanation

Fig. 1 is the three-dimensional structure diagram of non-return antifreezing valve;

Fig. 2 is the cut-away view after non-return antifreezing valve removes body;

Fig. 3 is that the parts in Fig. 2 split schematic diagram;

Fig. 4 is the sectional view under the non-return state of non-return antifreezing valve;

Fig. 5 is the sectional view under non-return antifreezing valve open mode;

Fig. 6 is the plan structure figure of valve core housing in non-return antifreezing valve;

Fig. 7 is the face upwarding assumption diagram of valve core housing in non-return antifreezing valve;

Fig. 8 is the A-A-sectional view of Fig. 7;

Fig. 9 is the structural drawing of non-return lid in the second embodiment, and the structure of the first draining scale removal groove is shown;

Figure 10 is the structural drawing of mandrel in the 3rd embodiment, and emphasis illustrates the structure of the second draining scale removal groove.

Embodiment

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

As shown in Figures 1 to 10, the utility model provides a kind of non-return antifreezing valve, comprise body 8, be installed on the spool in described body 8, the valve switch of controlling described spool unlatching or closing, between described spool and described body 8 inwalls, be formed with the runner 29 that current are logical, described runner 29 is communicated with described body drain opening 28.Body 8 also is equipped with compression relief cock, and compression relief cock comprises ventilative water plug core 22, ventilative water choker block sheet 23, ventilative seat 24, ventilating cover 25, and seal ring 14.Compression relief cock is existing conventional design, belong to routine techniques, its working principle is to utilize the pressure of hydraulic pressure to lean to act on water pipe while opening, and the pressure of water water plug core 22 jack-up of breathing freely, make ventilative water plug core 22 insert ventilative seat 24 Zhong Jiang holes, hole that are complementary and block sealing.Now, produce pressure reduction.Work as valve closing, during the inner flow passage residuary waters, hydraulic pressure reduces, and the deadweight of ventilative water plug core 22 can overcome hydraulic pressure, from hole, deviating from, ventilative pressure release, inside and outside differential pressure is identical, water in runner is automatically from drain opening 28, discharging, ponding not in runner, and antifreezing effect can be played in a day cryogenic region open air.

Valve switch comprises set screw 1, inscription plate 2, handle 3, compacting plug 4, flat gasket 6, lock washer 5.The front end of upper mandrel is connected by set screw with handle 3, concrete as Fig. 4, Fig. 5, and the front end of upper mandrel 91 passes lock washer 5, flat gasket 6 and compacting plug 4, and set screw 1 passes inscription plate 2 and handle 3, and set screw and upper mandrel thread are connected and fixed afterwards.Operator drive mandrel by rotatory handling and rotate, and upper mandrel band moving mandrel 97 rotates, the open and close of control valve core assembly then.

Described spool comprises mangetic core assembly, the unlatching of actuating valve core assembly or the mandrel 97 of closing, the upper mandrel 91 be connected with mandrel 97 and the spool body of controlling the current break-make.Mangetic core assembly comprises ceramic valve core fixed plate 152 and ceramic valve core movable plate 151, as shown in Figure 3, ceramic valve core fixed plate 152 and movable plate 151 are shaped as circle, wherein symmetrically on ceramic valve core fixed plate 152 bodies have two water outlets, ceramic valve core movable plate 151 and its Coaxial Superimposed, body has the sealing section corresponding with two water outlets and for the breach with mandrel 97 two symmetries in mating connection, this structure can realize that mandrel 97 only rotates 1/4th and turns the open and close that can realize valve, compare existing valve opening and close 1 week of needs or half turn, reduced rotation angle, be easier to control operation.The working principle of mangetic core assembly is to control the ceramic valve core movable plate to rotate relative to fixed plate, makes the location overlap of sealing section and water outlet or staggers, thus circulation or the shutoff of control water.The rotation of controlling the ceramic valve core movable plate realizes driving in the breach that an end of mandrel inserts movable plate.

As shown in Figures 1 to 5, the spool body comprises spool cock 18 and valve core housing 17, and spool cock 18 and valve core housing 17 mutually are tightly connected and form cavity, and described here being tightly connected refers to that spool cock 18 is threaded with valve core housing 17.The end of spool cock 18 is provided with water intake 26, and the end of valve core housing 17 is provided with water outlet 27, and the runner 29 formed between water outlet 27 and spool body and body 8 inwalls is communicated with, and water directly enters runner by water outlet 27, then is discharged through drain opening 28 by runner 29.Nut 20 is pegged graft and is fixedly connected with for interior hexagonal with spool cock 18, is through hole in the middle of nut 20, communicates with the water intake 26 of spool cock 18.Water intake 26, water outlet 27 are communicated with cavity, and in order to guarantee sealing effect, the outer wall cover of spool cock 18 has two seal rings 19, the sealing for nut 20 socket connection the time.Mangetic core assembly is located in spool cock 18 and with valve core housing 17, is connected in the rear cavity formed, wherein ceramic valve core fixed plate 152 is fixed in valve core housing 17, as shown in Figure 4, Figure 5, by pad 16, lean fixing by the front end of spool cock 18, and an end of mandrel 97 has two cutting graftage parts 972, be inserted in two breach of ceramic valve core movable plate 151 and be connected, by rotation, drive the rotation of movable plate.The inwall of valve core housing 17 is provided with spacing preiection, drives be used to limiting mandrel 97 angle that the ceramic valve core movable plate rotates.

Also comprise non-return lid 95 and drive the actuator of non-return lid 95 activities.As shown in Figure 4, Figure 5, the other end of mandrel 97 stretches out from the end of valve core housing 17, the position cover that mandrel 97 is positioned at valve core housing 17 has diaphragm seal 21, the outer wall cover that is positioned at the mandrel 97 of valve core housing 17 has two sealing rubber rings 98, when making mandrel 97 stretch out valve core housing 17, guarantee sealing, avoid the connecting part seepage of water from stretching out.The length that mandrel 97 stretches out the spool body is greater than the length of non-return lid 95, to guarantee non-return lid 95, the required distance of slip can be arranged, and meets the required distance that non-return lid leaves water outlet.As Fig. 6, shown in Figure 8, place, the axle center of valve core housing 17 ends has through hole, and mandrel 97 is from stretching out this through hole.And water outlet 27 is a plurality of, take through hole as axle center circumferentially.Stretch out mandrel and non-return lid 95 pivot bush units of valve core housing 17, the present embodiment is for being slidably socketed, non-return lid 95 is corresponding with water outlet 27, water outlet 27 is on the axial direction of non-return lid 95 slips, non-return lid 95 covers on water outlet 27, and between non-return lid 95 and water outlet 27, mandrel 97 is gone back flip sleeve and is connected to gasket seal 96, non-return lid 95 is covered on water outlet 27 by press seal pad 96, seals non-return better effects if.

In the present embodiment, actuator is spring 94, and spring 94 is slidably socketed mutually with mandrel 97.The other end of mandrel 97 stretches out from the end of valve core housing 17, and front end is equipped with mandrel joint 92, one end and the upper mandrel 91 of mandrel joint 92 is welded and fixed, the other end is connected and fixed by bolt 93 and the front end of mandrel 97, play the effect of connecting mandrel 97 and upper mandrel 91, the rotation band moving mandrel 97 of upper mandrel 91 together rotates.One end of spring 94 is fixed in mandrel joint 92, and the other end relies on non-return lid 95.Cutting off the water when non-return, the elastic force of spring 94 drives non-return lid 95 and is placed on water outlet 27.

As shown in Figure 5, mandrel 97 rotating drive ceramic valve core movable plates 151 in valve core device rotate, the sealing section of movable plate 151 and the water outlet on ceramic valve core fixed plate 152 are staggered, thereby current are flowed in the cavity that spool cock 18 and valve core housing 17 form along the water intake 26 of valve core device, by water outlet 27, flowed out again afterwards, when current flow out from water outlet 27, the elastic force that the pressure of current can overcome spring 94 backs down non-return lid 95, thereby open water outlet 27 fully, water is flowed out.

As shown in Figure 4, mandrel 97 rotating drive ceramic valve core movable plates 151 in valve core device rotate, while making the sealing section of movable plate 151 and the water outlet on ceramic valve core fixed plate 152 overlapping, current are blocked, water intake 26 is no longer intake, and the water flowed out from water outlet 27 also stops, and now due to ceramic valve core movable plate and ceramic valve core fixed plate, closes, blocked the water source of water intake and the water source of water outlet, played the water source that prevents water outlet and from water outlet, oppositely flow into the water source of water intake.But, in use, do not close if there is ceramic valve core movable plate and ceramic valve core fixed plate, and the water source of water outlet stops supplying water, now the water source of water outlet such as will pollute along the ，Dui water source, water source that the water outlet adverse current enters water intake at the impact.Therefore, when normal use, but in the situation that the water intake water source stops, the outside flowing water of water outlet stops, now under cartridge cover 95 pressure that outside water outlet, current reflux in the elastic force of spring leans lower and valve, together lean on water outlet 27 together with gasket seal 96, make water outlet 27 sealings, external water can not reflux along water outlet 27, has influence on the water quality of watering.

Meanwhile, as shown in Figure 4, Figure 5, described water intake 26 is positioned at a side of described mangetic core assembly, described mandrel 97 and be positioned at the opposite side of described mangetic core assembly with the non-return lid 95 of described mandrel 97 sockets.The ceramic valve core fixed plate 152 of mangetic core assembly is fixedly mounted in valve core housing 17, corresponding with water intake 26, and one section of 151 of ceramic valve core movable plates and mandrel 97 is connected, the front end of mandrel 97 and the socket of non-return lid.In zone between ceramic valve core fixed plate 152 and water intake 26, when water intake 26 water inlets, spool 97 control valve core assemblies are shown in an open position, and current back down non-return lid from water outlet and flow out.When water intake 26 stops supplying water, it is non-return that water outlet is pushed down in non-return lid aftertaste.Not non-return can't the backflow of water now, the ponding in the zone between ceramic valve core fixed plate 152 and water intake 26 is discharged along water intake 26, can not pile up.Especially out of doors winter cold area, because having discharged ponding, can not cause icingly, just can to inner components, not damage such as mandrel and non-return lid comprise valve core housing etc. because of volumetric expansion after freezing yet.And in prior art, mandrel and non-return cover are in the zone between ceramic valve core fixed plate 152 and water intake 26, in case non-return, this zone, because of the existence of mandrel and non-return cover, forms confined space, ponding can not be discharged, in case freeze, freeze, volumetric expansion, will damage the parts pinch, even lean non-return lid and produce displacement, cause losing non-return effect.

The embodiment that the utility model provides, non-return lid 95 is enclosed within the outside of mandrel 97, and mandrel 97 stretches out valve core housing 17.Non-return lid 95 be take all the time mandrel 97 and is that guiding slides in whole reciprocatingly sliding, mandrel 97 has played the radially spacing effect of non-return lid 95, thereby makes non-return lid that radial deflection not occur, stuck situation.In addition, non-return lid 95 is with mandrel 97 socket relative sliding the time, and spacing is very near, and can scratch the incrustation scale of piling up on mandrel in the end of non-return lid 95 when sliding, reduce the accumulation of incrustation scale, prevents because of the stuck situation of build-up of limescale.Reach the effect from scale removal, rate of fault obviously descends.Solved in prior art and existed and insurmountable technological scheme always.

Further, as shown in Figure 9, the second embodiment who provides for the utility model, the improvements of this scheme are, the sidewall of non-return lid 95 has the first draining scale removal groove 951, when the relative mandrel 97 of non-return lid 95 slides, the trough rim of the first draining scale removal groove 951 is along playing the incrustation scale effect on scratch mandrel outer wall, ponding between incrustation scale or mandrel and non-return lid can be discharged by the first draining scale removal groove 951 again, also can drain the water away in the time of scale removal, effect is more obviously outstanding.

The another kind of improvement as shown in figure 10, be the 3rd embodiment, is to open the second draining scale removal groove 971 at the position that mandrel 97 and non-return lid 95 are slidably socketed, and its effect is identical with the first draining scale removal groove 951, repeats no more.

More outstanding improvement, be by above-mentioned the second embodiment and the 3rd embodiment's combination, on non-return lid 95, opens the first draining scale removal groove 951, on mandrel 97, opens the second draining scale removal groove 971, and the effect of scale removal row ponding is more outstanding.

In the 4th embodiment that the utility model provides, the inwall of non-return lid 95 is provided with a plurality of the first measure-alike draining scale removal fins along circumference, a plurality of draining fins form one be used to being socketed the through hole of mandrel, when non-return lid 95 is socketed with mandrel 97, a plurality of the first draining fins contact with the outer wall of mandrel 97, by the relative sliding of non-return lid 95 with mandrel 97, by the incrustation scale on the first draining scale removal fin scratch mandrel outer wall, and discharged by the gap on fin side.

Scheme further, as the 5th embodiment that the utility model provides, mandrel 97 is provided with the second draining scale removal fin with the position that non-return lid 95 socket-connects, and acts on identical with the first draining scale removal fin.

In conjunction with the above-mentioned the 4th and the 5th embodiment's scheme, on non-return lid 95, open the first draining scale removal fin, on mandrel 97, open the second draining scale removal fin, the effect of scale removal row ponding is more outstanding.

Claims (10)

1. non-return antifreezing valve, comprise body, be installed on the spool in described body, control the valve switch that described spool is opened or closed, between described spool and described inboard wall of tube body, be formed with the runner that current are logical, described runner is communicated with described body drain opening, described spool comprises controls the mangetic core assembly that current are logical, drive the mandrel (97) that described mangetic core assembly is opened or closed, the upper mandrel (91) be connected with described mandrel (97), and spool body, described spool body comprises water intake (26), water outlet (27), with the cavity that is communicated with described water intake (26) and water outlet (27), it is characterized in that: also comprise non-return lid (95), with the actuator that drives described non-return lid (95) activity, described mangetic core assembly is arranged in described cavity, one end of described mandrel (97) matches with described mangetic core assembly, the other end stretch out described spool body and with described non-return lid (95) pivot bush unit, and its end is connected with described upper mandrel (91), described non-return lid (95) is corresponding with described water outlet (27), one end of described actuator is fixed, the other end is connected the described non-return lid of driving (95) and is placed on described water outlet (27) with described non-return lid (95).

2. a kind of non-return antifreezing valve according to claim 1, it is characterized in that: described non-return lid (95) is slidably socketed with described mandrel (97), described mandrel (97) also is socketed with gasket seal (96), and described gasket seal (96) is positioned between described non-return lid (95) and described water outlet (27).

3. a kind of non-return antifreezing valve according to claim 1 is characterized in that: the sidewall of described non-return lid (95) have the first draining scale removal groove (951) and/or described mandrel (97) body that socket-connects with described non-return lid (95) on have the second draining scale removal groove (971).

4. a kind of non-return antifreezing valve according to claim 1, it is characterized in that: the inwall of described non-return lid (95) is provided with the first draining scale removal fin and/or is provided with the second draining scale removal fin with described mandrel (97) body that described non-return lid socket-connects.

5. according to the arbitrary described a kind of non-return antifreezing valve of claim 1 to 4, it is characterized in that: described actuator is spring (94), described spring (94) and described mandrel (97) socket.

6. a kind of non-return antifreezing valve according to claim 5 is characterized in that: described water outlet (27) is positioned at described non-return lid (95) in axial sliding on direction, and described non-return lid (95) is placed on described water outlet (27).

7. a kind of non-return antifreezing valve according to claim 6, it is characterized in that: described spool body comprises spool cock (18) and valve core housing (17), described spool cock (18) and valve core housing (17) mutually are tightly connected and form described cavity, described spool cock (18) is provided with described water intake (26), and the end of described valve core housing (17) is provided with described water outlet (27).

8. a kind of non-return antifreezing valve according to claim 7, it is characterized in that: described water intake (26) is positioned at a side of described mangetic core assembly, described mandrel (97) and be positioned at the opposite side of described mangetic core assembly with the non-return lid (95) of described mandrel (97) socket.

9. a kind of non-return antifreezing valve according to claim 8 is characterized in that: described water outlet (27) is for a plurality of, and a plurality of described water outlets (27) circumferentially.

10. a kind of non-return antifreezing valve according to claim 9, it is characterized in that: described mangetic core assembly comprises ceramic valve core fixed plate (152) and ceramic valve core movable plate (151), one end of described mandrel (97) connects the described ceramic valve core movable plate of driving (151) with described ceramic valve core movable plate (151) and rotates relative to described ceramic valve core fixed plate (152), and described ceramic valve core fixed plate (152) is fixed in described valve core housing (17).

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