CN200965066Y

CN200965066Y - Scald-proof security valve

Info

Publication number: CN200965066Y
Application number: CN 200620139725
Authority: CN
Inventors: 李志信
Original assignee: NINGBO DINGLONG BATH EQUIPMENTCO Ltd
Current assignee: NINGBO DINGLONG BATH EQUIPMENTCO Ltd
Priority date: 2006-11-06
Filing date: 2006-11-06
Publication date: 2007-10-24
Anticipated expiration: 2016-11-06

Abstract

The utility model relates to a burn-proof safety valve which can interdict high heat water flow. A passage in the valve body is provided with 2 end-to-end valve cores which are provided with an expansion chamber which is filled with heat dilatant, an elastomer for sealing and a thimble and cap cover for transmission; one end of the valve core is provided with a recovery device and the other end of the valve core is provided with a positioning device. The water flows by the valve core; the heat dilatant expands to make the elastomer produce deformation; the thimble and cap cover are pushed to make the passage is closed; the valve core can be closed by grade according to different temperatures of the water flow; the utility model can control the requirements of different water temperatures, fast truncate, has short response time, and implements automatic control.

Description

Scalding preventing protection valve

Technical field

The utility model relates to a kind of element that is loaded on the bathroom with outlet terminal, the especially a kind of scalding preventing protection valve that can block high hot-fluid water.

Background technique

Water tap is the switch at indoor water source, and the size of being responsible for control and regulating the flow of water is the pipeline parts of each family's indispensability.Come to divide from function of use, have substantially that the bathroom is leading with tap, washbasin, three kinds of Kitchen taps, unified style and form are generally all arranged.The bathroom is divided into Tap for bathtub and shower faucet again with tap, Tap for bathtub: it is loaded on bathtub top on one side, is used for open cold and hot mixing water, can connect the twin that is called of cold and hot two pipelines; The structure that opens and closes current has spiral lift, metal ball-valve formula, ceramic valve core formula etc.; Shower faucet: it is installed on the shower house top, be used for open cold and hot mixing water, valve body is also many to be made with brass, appearance has chromium plating, gold-plated etc., the mode that opens and closes current has screw rod rise-fall type, ceramic valve core formula etc., shower faucet has the branch of flexible pipe gondola water faucet and wall built-in type gondola water faucet, the tool specific function constant-temperature tap arranged, the tap of band filtrating equipment and the tap etc. of drawing and pulling type flexible pipe is arranged; The washbasin tap: it is installed on the washbowl, is used to put cold water, hot water or cold and hot mixing water etc.; The multifunctional kitchen tap: if your kitchen heat in the interior water pipeline, this tap also should be a duplex.

At present, known cold and hot water supply system divides cold water water lines and hot water pipe, mixes after water tap or valve flow out, and mixes the moving rotatable handle of adjusting armrest of back water temperature and regulates.Water tap according to handle divide single handle class, with water tap 90 ° of switches and the steady lift-type rubber seal of traditional spiral.Hot water is different with the discharge pressure of cold water, and the temperature of current can not better controlled after hot water and cold water mix, and the rotation of handle can't realize accurate angle control, hot water and the ratio that belongs to mixing of cold water at random.The temperature of the current that come out at the tap of not knowing to fetch boiling water under the situation of water temperature may be higher, for handicapped as children, amentia personage or individuals with disabilities, the accident that can occur scalding, and the process of adjusting can't guarantee precision, occurs sometimes hot and sometimes cold.The water of water pipe the inside beginning is cold water, hot water or mixing water could appear in the cold water that also needs when rotatable handle puts hot water to give out light earlier in the pipeline, if the ratio of the angle of swing primary chilled water of handle is greater than the ratio of hot water, the temperature of mixing water is not high, if the angle of swing of handle is big, then the ratio of hot water may the too high situation of water temperature occur greater than the ratio of cold water, and the accident of scalding takes place easily.

At this situation, someone has carried out research and has declared patent, the patent No. is 94216147.5, patent name is automatic anti-scald foot-operated showering, this product has the valve body that mixes water valve tube and water outlet valve cylinder, and the valve gap that is contained in automatic controlling mechanism of temperature and the foot-operated outlet water control mechanism in two valve cylinders respectively and is fixed on valve body lower end is formed; The water outlet valve cylinder communicates with mixed water valve tube.Because the memory alloy spring in the automatic controlling mechanism of temperature can be according to himself length of temperature change, thereby the spool that can drive on the guide rod is controlled hot water flow.The mixing water temperature is controlled in below 55 ℃, reaches anti-scald purpose, be applicable to that the hot and cold water in industrial and mineral, enterprise, the Household bathroom mixes control.The size that this structure adopts memory alloy spring to regulate water inlet of hot water, response change is slow, regulates at the bottom of the sensitivity.

At this situation, someone has carried out research and has declared patent, the patent No. is 00221518.7, patent name is anti-scald intelligent safety valve, this product comprises spigot, guide pin bushing, socket, the machinery heat responsive element, spring is formed, guide pin bushing, heat responsive element, spring is inserted space in the joint, spigot screws in socket, spigot and socket all have through hole, guide pin bushing is bearing on the joint one end step, and an end of supporting bellows machinery heat responsive element, and the other end of bellows heat responsive element contacts with spring, the spring the other end is contained on the socket guide pin bushing step, and this end of bellows heat responsive element and inner nosepiece wall have step-like space.When the temperature of scalding water surpasses a certain safety temperature, automatically current are turn-offed.This structure adopts one-level to regulate, and the scope of adjusting is little, can not regulate simultaneously in range of temperature.

It is 02237056.0 that the somebody has declared the patent No., and name is called the patent of the anti-scald water tap that contains equilibrated valve, and this patent includes a faucet body and an equilibrated valve.Wherein the lower end, cold water water outlet duct of the mixing valve chamber of this faucet body connects a balance valve chamber, and the hot water or cold water that lower end, hot water effluent duct connects faucet body both sides, groove chamber that are communicated with the balance valve chamber lower end duct that intakes is communicated with for upper and lower section with the balance valve chamber respectively; This equilibrated valve system is made up of an outer sleeve, an inner sleeve and a gag, this outer sleeve cover has three water stop rings, its tube wall respectively is provided with ring-type hollow out hole slot at interval, sleeve pipe one end extends a hollow external thread section, the tube wall of the dividing plate left and right sides of inner sleeve central interior setting also respectively is provided with ring-type hollow out hole slot at interval, and the gag stage casing is provided with two relative water outlet breach.By said structure, it is indoor that equilibrated valve is assembled in the equilibrium valve of faucet body, when cold water hydraulic pressure reduces, can stop hot water automatically and enter, and avoid causing scald.This structure processing is complicated with assembling, and technological requirement is higher.

The model utility content

The utility model has solved hot water flow control deficiency in the prior art, causes the problem of scald easily, provides a kind of and can conveniently control hot water flow, blocks or reduce the scalding preventing protection valve of the ratio of hot water in mixing water.

The utility model has also solved the single problem of control flow rate in the prior art, and a kind of scalding preventing protection valve that can control hot water flow in different phase is provided.

A purpose more of the present utility model is to be automatically in the middle of the engineering of control hot water current, need not the user of service and adjusts

Its technical problem that solves the utility model adopts the ground technological scheme to be: a kind of scalding preventing protection valve, be provided with passage in the valve body, the two ends of passage link to each other with water outlet with water intake respectively, are provided with control gear in the passage, wherein, described control gear is connected to form from beginning to end by the two-stage spool; The cap II of the first order spool of close water outlet matches with the inwall of water outlet and can form enclosed construction, the cap I of second level spool matches with the chamfering I of valve inner can form enclosed construction, the two-stage spool is respectively equipped with expansion chamber II and expansion chamber I near an end of water outlet, the end that second level spool is withstood in the bottom of the expansion chamber II of first order spool is filled with in the expansion chamber and meets the thermal expansion thing.Adopt multiple step plug to carry out multistage control to the temperature of hot water, the expansion chamber expanded by heating, promote thimble, one-level spool and the end of secondary spool are closely contacted with separately the part that matches, different temperatures causes that expansion chamber not at the same level expands, finish the work of closing at each position, when temperature was hanged down, the expansion chamber I of one-level spool is work earlier, and one-level is closed, temperature improves, the expansion chamber II work of secondary spool, secondary is closed, when temperature does not reach to greatest extent, the expansion of expansion chamber does not reach the maximum level limit, the stream circulation of supplying water in the spaces that cooperate the contact position can stay different sizes, when temperature reach setting to greatest extent the time, the expansion chamber of every grade of spool is all worked, the internal cavities of safety valve is closed, play the effect of blocking high-temperature-hot-water; If plane and plane contact planeness and roughness do not reach requirement, can produce the gap between the surface of contact, poorly sealed, so the end of cap adopts fillet to cooperate with the chamfering of the internal cavities of valve body, form sealing, the end is that fillet can also reduce the resistance in the movement process.

Wherein, the inwall of described expansion chamber I, expansion chamber II seals flexible body I, elastomer II, is connected with thimble I and thimble II on the elastomer, and cap I and cap II are withstood in the end of thimble I, thimble II.The inwall of expansion chamber seals the chance thermal expansion thing that flexible body prevents the inside and oozes out from the inside, promotes thimble by elastomeric distortion, and thimble promotes cap then makes cap contact closed channel with chamfering.

For to the thimble guiding, be with rigid top needle guard I, tailstock spindle II on described thimble I, the thimble II respectively, the centre of tailstock spindle is a through hole, and the diameter of through hole forms Spielpassung greater than the diameter of thimble, and thimble can be free to slide in through hole.Thimble is placed on and forms Spielpassung in the tailstock spindle, can be free to slide, and under the effect of elastomer distortion, stretches out outward, and the cap that promotes to be enclosed within on the thimble advances, and pushes down the internal chamber wall of valve body; If elastomer is the location not, thimble is loosening easily, can deviate to drop at the inner chamber of valve body in movement process; Elastomer is tightly pushed down at the edge of tailstock spindle, makes elastomeric distortion concentrate position intermediate, produces enough amount of movements.

As preferably, the opening of described expansion chamber curves snap ring, tightly pushes down tailstock spindle and elastomer, and tailstock spindle I and elastomer I surface of contact are provided with groove and the convex body that cooperatively interacts.The elastomer deformed edge partly can be shunk toward middle, can not cause the paraffin of the inside to exosmose if the edge does not compress, and therefore groove and the convex body that cooperatively interacts be set on tailstock spindle and elastomeric surface of contact.

As preferably, described expansion chamber is cylindric, and meeting the thermal expansion thing is paraffin, and the diameter in the expansion chamber and the diameter ratio of thimble are 1: 3～1: 5.As preferably, adopt paraffin as meeting the thermal expansion thing, paraffin is to responsive to temperature, can draw what relation of the content of temperature and paraffin by test; Elastomer first seals as paraffin, and the move distortion of gonosome of the zone of swelling of second paraffin makes spool work thereby promote thimble.

Wherein, be with location piece on the described tailstock spindle I, separate expansion chamber I and cap I, be with guiding piece on the tailstock spindle II, separate expansion chamber II and cap II.Expansion chamber is static, and the paraffin in the expansion chamber is met thermal expansion and made the elastomer distortion, promotes thimble and moves, and promotes the position that cap running fix sheet is used for keeping expansion chamber then, and guiding piece guarantees the moving direction of first order spool.

Wherein, the inside of described valve body is step-like passage, the inwall of water outlet is step II, the intermediate flow water level of step II has been put chamfering II, the medium position of passage is provided with chamfering I, step I, the water inlet is provided with tapered thread, and the diameter of each step increases successively from water outlet end toward inlet end.Spool in the passage is adorned inward from inlet end, so each size is to increase successively from inlet end; In order to guarantee the seal action of cap, chamfering is set in passage, when being contacted with chamfering, cap forms sealing surface; The cap of spools at different levels and the space between the chamfering record according to experiment repeatedly, the packing of expansion chamber inside how much determine degrees of expansion, and then influence time and degree closed between cap end and the chamfering, require that the assurance current can not flow out when closed.

As preferably, described guiding piece and valve inner match near the passage of water outlet end, can be free to slide; Location piece is shelved on step I place, props up expansion chamber II, in reset condition, between cap and the chamfering space is arranged.Location piece keeps the position of expansion chamber I, makes cap I can be returned to the origin-location in expansion chamber reduction back under the effect of spring II; Guiding piece makes first order spool freedom of movement in passage, can not be partial to and blocks.

Wherein, the place is rotary with bearing at water outlet, and the screw thread of the both sides of bearing for matching with valve body water outlet place has the discharge orifice in the middle of the bottom of bearing, and the diameter of discharge orifice is less than the diameter of the inwall of bearing; Between step II and cap II, be with spring II, be with spring I between bearing and the expansion chamber I; The spring compression first order spool at two ends and secondary spool.Spring I makes expansion chamber I motionless in the home position all the time, guarantees the expansion direction of paraffin and the movement direction of thimble; Spring II plays reset response, and after paraffin restored, under the effect of spring II, cap left the chamfering of contact with it, keeps the unimpeded of passage; The inside of bearing can be established screw thread in addition, so that intake pipe is connected with scalding preventing protection valve.

Wherein, described spring is horn-like, is nested with at the spring diameter of that end of the convex edge the other end less than spring; The bigger diameter end diameter of spring I is less than the intracavity diameter of water outlet end, and greater than the major diameter of chamfering I, the bigger diameter end diameter of spring II is less than the diameter of bearing inwall, greater than the diameter of discharge orifice; The required deformation force of spring II is greater than the required deformation force of spring I.The difference of the elastic force of the spring at two ends, the elastic force of the spring of water outlet end be less than the elastic force of the spring of inlet end, so the one-level spool of water outlet end closes earlier, and then the secondary spool is closed, and closes spools at different levels successively according to the order from the water outlet to the water intake.

The beneficial effects of the utility model are: can be used in basket strainer and the gondola water faucet, also can be used in the bathtub water outlet of bathtub, the spool of valve inner can move back and forth, dilatant expanded by heating in the expansion chamber, cap on the thimble contacts with the chamfering of valve interior wall that forming closely cooperates blocks the high temperature current, prevents that handicapped personnel from scalding; Inner spool is divided into multipole work, under the situation of different temperatures, and the degrees of expansion difference of dilatant, thus control adjusting gradation actions at different levels; By the temperature that the number decision spool of dilatant is closed, come definite temperature that needs the current of adjusting, realize control automatically, need not artificial conversion.

Description of drawings

Fig. 1 is the structural representation of a kind of scheme of the utility model;

Fig. 2 is the sectional view of a kind of valve body of the utility model;

Fig. 3 is the structural representation of a kind of spool of the utility model;

Fig. 4 is a kind of structural representation of first order spool of the present utility model.

Among the figure: 1, valve body, 2, spring II, 3, cap II, 4, guiding piece, 5, passage, 6, cap I, 7, location piece, 8, spring I, 9, bearing, 10, spool, 11, thimble I, 12, tailstock spindle I, 13, elastomer I, 14, groove, 15, paraffin, 16, expansion chamber I, 17, convex body, 18, snap ring, 20, first order spool, 21, thimble II, 22, tailstock spindle II, 23, elastomer II, 24, expansion chamber II, 30, water outlet, 31, step II, 32, chamfering II, 33, step I, 34, tapered thread, 35, water intake, 36, chamfering I.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment: the end of valve body is spherical, whole smooth does not have the sword limit, the inside of valve body is provided with straight-through passage 5, the two ends of passage are respectively water intake 35 and water outlet 30, passage in the valve body is stepped, be provided with step II31 near water outlet end, chamfering II32 is arranged on the step II, the neutral position of passage is provided with chamfering I36, be provided with step I33 near chamfering towards the position of water intake, the water outlet place is provided with tapered thread 34, each step, chamfering and tool withdrawal groove etc. and channel center's dead in line (referring to accompanying drawing 2), channel interior is provided with 2 end to end spools, the tail end that is the expansion chamber II24 of first order spool 20 withstands the front end of the cap I6 of one-level spool 10 afterwards, the afterbody of expansion chamber II is an inner concave, and form a cavity between the cap I6, to be fillet with chamfering I in the passage match the front end of cap I can form sealing surface, it is cylindric that expansion chamber is, in be filled with paraffin 15, flexible body I13 of envelope and elastomer II23 in expansion chamber I16 and the expansion chamber II24, elastomer I and elastomer II are tightly pushed down in rigid top needle guard I12 and tailstock spindle II22 end, the inwall of expansion chamber and tailstock spindle and elastomeric EDGE CONTACT form snap ring 18, be installed with thimble I11 and thimble II21 in tailstock spindle I and the tailstock spindle II, the diameter in the expansion chamber and the diameter ratio of thimble are 1: 4, through hole in the middle of the tailstock spindle and the thimble formation Spielpassung that matches, the surface of contact of tailstock spindle I and elastomer I is provided with groove 14, corresponding position on elastomer I is provided with convex body 17, groove match with convex body (referring to accompanying drawing 3 accompanying drawings 4), be separated with location piece 7 between cap I and the expansion chamber I, location piece is placed on the interior step I of passage, have certain clearance between cap I and the chamfering I this moment, the end of the thimble II of first order spool is with cap II, be separated with guiding piece 4 between cap II and the expansion chamber II, the outer rim of guiding piece is fixed against vias inner walls, first order spool can slide in passage, all be provided with the passage of current on guiding piece and the location piece, the end of cap II is that fillet cooperates with chamfering II and can form sealing surface, be provided with spring II2 between step II and the cap II, leave certain clearance between cap II and the chamfering II this moment, be rotary with bearing 9 on the tapered thread of water outlet 30 ends, the central authorities of bearing are provided with the flowing water through hole, are provided with spring I8 (referring to accompanying drawing 1) between bearing and the expansion chamber I.

Current enter safety valve from water intake, at first contact expansion chamber I, paraffin in the expansion chamber I is met thermal expansion, elastomer I distortion promotes thimble I, thimble I pushes cap I makes cap move toward water outlet end, first order spool also moves toward water outlet end simultaneously, but this moment, temperature was not very high, not all sealings between cap I and the chamfering I, continue to employ the space in addition, the paraffin in the expansion chamber II of first order spool is met thermal expansion, and elastomer II distortion promotes thimble II, thimble II push cap II make cap II end fillet near chamfering II, along with the rising of temperature, cap II withstands chamfering II and forms sealing, blocks current, temperature further raises, and cap I also withstands chamfering I and forms sealing; When the current temperature fell after rise, paraffin shrank, and under the effect of spring II, cap separates with chamfering, makes passage unimpeded.

Claims

1, a kind of scalding preventing protection valve is provided with passage in the valve body, the two ends of passage link to each other with water outlet with water intake respectively, is provided with control gear in the passage, it is characterized in that: described control gear is connected to form from beginning to end by the two-stage spool; The cap II (3) of the first order spool (20) of close water outlet matches with the inwall of water outlet and can form enclosed construction, the cap I (6) of second level spool (10) matches with the chamfering I (36) of valve inner can form enclosed construction, the two-stage spool is respectively equipped with expansion chamber II (24) and expansion chamber I (16) near an end of water outlet, the end that second level spool is withstood in the bottom of the expansion chamber II of first order spool is filled with in the expansion chamber and meets the thermal expansion thing.

2, scalding preventing protection valve according to claim 1, it is characterized in that: the inwall of described expansion chamber I, expansion chamber II seals flexible body I (13), elastomer II (23), be connected with thimble I (11) and thimble II (21) on the elastomer, cap I and cap II are withstood in the end of thimble I, thimble II.

3, scalding preventing protection valve according to claim 1, it is characterized in that: be with rigid top needle guard I (12), tailstock spindle II (22) on described thimble I, the thimble II respectively, the centre of tailstock spindle is a through hole, the diameter of through hole is greater than the diameter of thimble, form Spielpassung, thimble can be free to slide in through hole.

4, according to claim 1 or 2 or 3 described scalding preventing protection valves, it is characterized in that: the opening of described expansion chamber curves snap ring (18), tightly push down tailstock spindle and elastomer, tailstock spindle I and elastomer I surface of contact are provided with the groove (14) and convex body (17) that cooperatively interacts.

5, scalding preventing protection valve according to claim 4 is characterized in that: described expansion chamber is cylindric, and meeting the thermal expansion thing is paraffin (15), and the diameter in the expansion chamber and the diameter ratio of thimble are 1: 3～1: 5.

6, scalding preventing protection valve according to claim 3 is characterized in that: be with location piece (7) on the described tailstock spindle I, separate expansion chamber I and cap I, be with guiding piece (4) on the tailstock spindle II, separate expansion chamber II and cap II.

7, scalding preventing protection valve according to claim 1, it is characterized in that: the inside of described valve body (1) is step-like passage (5), the inwall of water outlet (30) is step II (31), the intermediate flow water level of step II has been put chamfering II (32), the medium position of passage is provided with chamfering I (36), step I (33), water intake (35) locates to be provided with tapered thread (34), and the diameter of each step increases successively from water outlet end toward inlet end.

8, according to claim 1 or 6 or 7 described scalding preventing protection valves, it is characterized in that: described guiding piece and valve inner match near the passage of water outlet end, can be free to slide; Location piece is shelved on step I place, props up expansion chamber II, in reset condition, between cap and the chamfering space is arranged.

9, according to claim 1 or 5 or 7 described scalding preventing protection valves, it is characterized in that: be rotary with bearing (9) at the water outlet place, the screw thread of the both sides of bearing for matching with valve body water outlet place has the discharge orifice in the middle of the bottom of bearing, and the diameter of discharge orifice is less than the diameter of the inwall of bearing; Between step II and cap II, be with spring II (2), be with spring I (8) between bearing and the expansion chamber I; The spring compression first order spool at two ends and secondary spool.

10, scalding preventing protection valve according to claim 9 is characterized in that: described spring is horn-like, is nested with at the spring diameter of that end of the convex edge the other end less than spring; The bigger diameter end diameter of spring I is less than the intracavity diameter of water outlet end, and greater than the major diameter of chamfering I, the bigger diameter end diameter of spring II is less than the diameter of bearing inwall, greater than the diameter of discharge orifice; The required deformation force of spring II is greater than the required deformation force of spring I.