CN2769640Y

CN2769640Y - Pressure reducing valve

Info

Publication number: CN2769640Y
Application number: CN 200420072054
Authority: CN
Inventors: 麦广海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-24
Filing date: 2004-07-24
Publication date: 2006-04-05
Anticipated expiration: 2014-07-24

Abstract

The utility model relates to a pressure reducing valve for a closed water storing heater, which has the advantages of simple structure, long service life and high safety and reliability and comprises a valve body and a water inlet valve. The utility model is characterized in that an expansion cavity is formed between the inner cavity of the valve body and an expansion wall; a pressure spring is arranged between the expansion wall and the valve body to cause the expansion wall to be inwards pressed by spring force; a control rod is fixed on the expansion wall, and the expansion cavity is communicated with a water outlet; the water inlet valve is installed on a water inlet canal between the expansion cavity and a water inlet; the opening-closing state of the water inlet valve is controlled by the control rod; a normally opened master valve is arranged on the water inlet canal between the expansion cavity and the water inlet; the opening-closing state of the normally opened master valve is controlled by the control rod. When the expansion wall is moved from the innermost position to the outermost position, the control rod closes the water inlet valve. After the control rod is moved for a section of virtual travel, the normally opened master valve is closed.

Description

Reduction valve

Technical field

The utility model relates to a kind of reduction valve, particularly a kind of closed storage water heater reduction valve.

Background technique

Existing closed storage water heater, its water tank inlet connects running water pipe, water outlet picks out water valve, open the outlet valve that joins with water outlet during use, water in the effect lower header of tap water pressure sprays through outlet valve, close outlet valve after, the pressure with tap water is identical all the time for the pressure in the water tank, stainless steel water tank under the environment of High Temperature High Pressure very easily by corrosion, thereby shorten the life-span of water tank, and when hydraulic pressure was too high, water tank there was the danger of blast; So there is the problem that the life-span is short, Security is low in existing closed storage water heater.Disclose among the disclosed Chinese patent CN2382909Y on June 14th, 2000 " a kind of inlet valve ", it is a kind of decompression constant pressure valve, in comprising, it drives joint, valve body, valve gap, diaphragm, the pressure spring in water hole into, valve rod reciprocatingly slides in valve body and seals, the water port of valve rod, side opening communicate with clearance channel, by the on-off of valve pad control with the water inlet, valve pad is to the sealing area of the water inlet useful area less than elastomer diaphragm, and wherein rubber membrane is actually one and is subjected to press in the valve body and expansion wall that pressure spring is controlled; Among the disclosed Chinese patent bulletin CN2296438Y a kind of " multi-functional pressure internally piloted valve " disclosed on November 4th, 1998, it is in fact roughly the same with the structural principle of above-mentioned " a kind of inlet valve ", also be a constant voltage reduction valve, just change rubber membrane into piston; The decompression type inlet valve valve rod of this structure is subjected to the water inlet spacing when closing water inlet direction motion, after valve pad is closed the water inlet, in case the impurity in the water is sandwiched between valve pad and the water inlet or the water tank water temperature raises, then press in the water tank to increase the danger that to blast; So used the closed storage water heater of the decompression type inlet valve of said structure to have Security equally and reliability is low, the life-span is short problem.

Summary of the invention

The purpose of this utility model is the problem that life-span is short, Security is low that exists in the existing closed storage water heater in order to solve, and provide a kind of simple in structure, the life-span long, safe and reliable closed storage water heater reduction valve.

Technological scheme:

The technological scheme that realizes the utility model purpose is: a kind of reduction valve comprises valve body and inlet valve; It is characterized in that surrounding expansion chamber between body cavity and the expansion wall, be provided with pressure spring between expansion wall and the valve body and make expansion wall be subjected to inside spring force, be fixed with controlling rod on the expansion wall, expansion chamber communicates with water outlet; Inlet valve is arranged on the intake tunnel between described expansion chamber and the water intake, and the on off state of inlet valve is controlled by described controlling rod; Intake tunnel between described expansion chamber and the water intake is provided with often drives main valve, the on off state of often driving main valve is controlled by described controlling rod, and when outermost moved, controlling rod was closed inlet valve earlier to described expansion wall by interior place, the one section virtual row stroke of passing by is then closed and is often driven main valve.Virtual row stroke described in the utility model is meant the stroke of controlling rod under the state that does not change inlet valve and normally closed safety valve.Also promptly often opening main valve and inlet valve is connected on the intake tunnel, its course of action is as follows: when the outlet valve of water heater is closed, press in the expansion chamber and increase, controlling rod outwards moves, the openings get smaller of inlet valve is closed fully up to inlet valve, at this moment, water tank interior pressure increase as closed storage water heater because of reasons such as temperature rise make, then expansion wall outwards moves a segment distance to absorb the value added of pressing in the expansion chamber, but do not change the closed condition of inlet valve and the state of Chang Kai main valve, and this segment distance is virtual row stroke described in the utility model, do not change the state of inlet valve and Chang Kai main valve at virtual row stroke inner control bar, after having only expansion wall outwards to cover the virtual row stroke, close again and often drive main valve, cut off the passage between expansion chamber and the tap water, cause danger to prevent to press too high in the water case, this is one of the obvious distinguishing characteristics of the utility model and existing reduction valve just, after drops in the expansion chamber, controlling rod resets, drive is often driven main valve and is reopened, after controlling rod oppositely passes through the virtual row stroke, control inlet valve again and open; Above-mentionedly close the action of often driving main valve, also may be blocked by impurity or inlet valve leaks and occurs can not normally close the time, so the utlity model has the function of anti-impurity, the reliability height at inlet valve.

Described reduction valve is characterized in that described expansion wall is a piston, and piston and body cavity match.

Described reduction valve is characterized in that described body cavity is provided with the drainage area by opening, and when piston moved to the drainage area, outwards drained in the gap of water between piston and drainage area in the expansion chamber.

Described reduction valve is characterized in that described body cavity is provided with the drainage area by opening, and when piston moved to the drainage area, the spilled water hole on the valve body wall of water through being positioned at the place, drainage area in the expansion chamber was outwards drained.

Described reduction valve is characterized in that described inlet valve is made up of water inlet, spool and Returnning spring, and the water inlet is arranged on the jointing place of described expansion chamber and intake tunnel, and spool is positioned at intake tunnel one side, and Returnning spring makes spool move to the water inlet direction.When controlling rod inwardly moves spool is pushed up to the intake tunnel direction, spool is separated with the water inlet, thereby open inlet valve, at this moment, outwards move as controlling rod, then spool resets under the effect of Returnning spring power, again with water inlet sealing, controlling rod begins described virtual row stroke with after spool separates.According to existing general knowledge, spring force herein also can replace with spool self gravitation or buoyancy, and, between controlling rod and spool, can also add reducing gear when opening inlet valve to reduce controlling rod firmly, do not do to state at this more.

Described reduction valve, it is characterized in that described inlet valve is a stop valve, the tooth that described controlling rod is provided with on the fan-shaped switch block of tooth bar and stop valve is mutually meshing, after controlling rod outwards moves to tooth bar and fan-shaped switch block separates, controlling rod enters described virtual row stroke, at this moment, position-limiting action is played to the rear side of fan-shaped switch block in the plane on the controlling rod, and the limit stoper of cutting out in this plane and the stop valve matches and fan-shaped switch block can not be turned round.Certainly, closing limit stoper and also can replace in the stop valve with the bullet piece that is arranged on the valve body, this bullet piece should be positioned at the front side of corresponding this moment of fan-shaped switch block; When controlling rod is moved into toe joint on tooth bar and the fan-shaped switch block and touches from the virtual row stroke, tooth bar again with fan-shaped switch block on tooth meshing.

Described reduction valve, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with can be along the tooth bar of controlling rod moving direction slip, tooth on this tooth bar and the stop valve switch block is meshing, be provided with the pressurize spring between described tooth bar and the controlling rod, when controlling rod outwards motion and drive switch block and close stop valve after, switch block stops operating, tooth bar is relative with switch block static, and the pressurize spring is compressed so that controlling rod can enter the virtual row stroke.When controlling rod returns from the virtual row stroke, behind the spring of release pressurize earlier, drive the switch block action again, in fact, the elastic force of pressurize spring should be the rotatory force of switch block.

Described reduction valve, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with the pushing block that pushes away platform and can slide along controlling rod moving direction, is provided with the pressurize spring between pushing block and the controlling rod pushing block is slided to pushing away the platform direction, and the valve rod of stop valve is at pushing block and push away between the platform; When controlling rod outwards motion and drive valve rod and close stop valve after, valve rod stops swinging, pushing block is blocked and can not move by valve rod, the pressurize spring is compressed so that controlling rod can enter the virtual row stroke.

Described reduction valve, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with bayonet socket, when controlling rod outwards motion and drive valve rod and close stop valve after, valve rod can not continue to former direction swing (because being provided with out and closing the spacing of position in the stop valve), valve rod skid off in this bayonet socket and the planing surface on controlled bar surface spacing and can not be to opening the direction backswing, controlling rod enters the virtual row stroke; When controlling rod moved inward from the virtual row stroke, the platform that pushes away that exceeds planing surface on the controlling rod pushed bayonet socket again with the valve rod of stop valve.

Described reduction valve is characterized in that the described main valve of often opening is a solenoid valve, and described valve body is provided with the solenoid valve trigger switch that is subjected to described controlling rod control.When controlling rod be equivalent to control above-mentioned when often driving main valve and closing, trigger switch connect can solenoid valve power supply, close the passage of solenoid valve shuts running water pipe and expansion chamber.

Beneficial effect:

Owing to adopted technological scheme described in the utility model; after having added reduction valve described in the utility model on the closed storage water heater; when pressing increase in the water tank; expansion wall can continue to move in the virtual row stroke presses value added to absorb in it; pressure is remained unchanged substantially or value added minimum; only occur inlet valve malfunctioning and situation such as can not close and make press in the water tank unusual when high; expansion wall is just crossed the virtual row Stroke Control and is often driven main valve and close; with the protection water tank; can not cause the water tank blast; improved the reliability of reduction valve; also improved and used reduction valve to reduce the Safety performance of the closed storage water heater of tap water pressure; make water tank can use thin material; even the employing plastics, thereby the material of water tank and the cost of reduction water tank have been saved.

Description of drawings

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

Fig. 1 is an embodiment's of a reduction valve described in the utility model structural representation.

Fig. 2 be Fig. 1 along A---the amplification profile of A line.

Fig. 3 is another embodiment's of a reduction valve described in the utility model structural representation.

Fig. 4 is another embodiment's of a reduction valve described in the utility model structural representation.

Fig. 5 is another embodiment's of a reduction valve described in the utility model structural representation.

Fig. 6 is another embodiment's of a reduction valve described in the utility model structural representation.

Fig. 7 is another embodiment's of a reduction valve described in the utility model structural representation.

Mark among the figure: 111, water outlet, 110, expansion chamber, 11, valve body, 121, controlling rod, 132, screw rod, 12, piston, 123, pressure spring, 128, intake pipe, 127, the plane, 143, secondary spring, 14, often drive main valve, 142, secondary spring, 141, tooth, 126, tooth bar, 124, guide pad, 129, the plane, 125, connecting leg, B, drainage area, 13, gear, 131, fore-set, 112, screw, 114, support, 115, rubber cushion, 116, spool, 117, guide pad; 210, expansion chamber, 214, the water inlet, 212, connecting leg, 222, tooth bar, 223, the plane, 241, tooth, 242, secondary spring, 24, often drive main valve, 243, secondary spring, 211, intake pipe, 224, pressure spring, 22, piston, 21, valve body, 213, water outlet, 221, controlling rod, 23, spool, 231, Returnning spring; 42, piston, 410, expansion chamber, 423, the pressurize spring, 45, inlet valve, 451, tooth, 412, connecting leg, 424, tooth bar, 425, the plane, 411, intake pipe, 44, often drive main valve, 426, the plane, 422, tooth bar, 421, controlling rod, C, drainage area, 41, valve body, 414, water outlet; 316, pressurize spring, 36, pushing block, 351, valve rod, 35, inlet valve, 324, the plane, 312, connecting leg, 322, tooth bar, 323, the plane, 311, intake pipe, 34, often drive main valve, 325, push away platform, 321, controlling rod, 31, valve body, 32, piston, 310, expansion chamber, 313, water outlet; 626, slide the plane, 625, bayonet socket, 651, valve rod, 65, inlet valve, 60, secondary spring, 612, connecting leg, 624, the plane, 622, tooth bar, 623, plane, 631, secondary spring, 611, intake pipe, 632, secondary spring, 64, often drive main valve, 641, rear side, 642, front side, 621, controlling rod, 61, valve body, 62, piston, 610, expansion chamber, 613, water outlet; 723, plane, 75, inlet valve, 712, connecting leg, 741, limited post, 74, often drive main valve, 711, intake pipe, 721, controlling rod, 722, tooth bar, 73, pressure spring, 72, piston, 71, valve body, 710, expansion chamber, 713, water outlet, 751, tooth.

Embodiment:

Embodiment one, and Fig. 1 is an embodiment's of a reduction valve described in the utility model structural representation.In conjunction with Fig. 1 and Fig. 2 as seen, described reduction valve, comprise valve body 11 and inlet valve, wherein inlet valve is by support 114, rubber cushion 115 and spool 116 constitute, its expansion wall is a piston, surround expansion chamber 110 between piston 12 and the body cavity, intake pipe 128 connects running water pipe, expansion chamber is provided with water outlet 111, when in the expansion chamber during changing of Hair Fixer, piston 12 under the acting in conjunction of internal pressure and pressure spring left or move right, cingulum moving gear 13 on the controlling rod 121 rotates, after the screw 112 of the screw rod 132 of gear below and valve body below interacts gear is risen or fall, spool 116 is separated with rubber cushion 115 or contact, the opening or closing of realization inlet valve; State shown in the figure is a holding state, inlet valve is closed, at this moment, if open the outlet valve of water heater, water in the expansion chamber has flowed through water outlet 111, drops in the expansion chamber, piston moves to left under pressure spring 123 effects, cingulum moving gear 13 rotations on the controlling rod, fore-set 131 on the gear is under the interaction of screw rod 132 and screw 112, move upward and upwards spool is separated the top with rubber cushion 115 spool 116, inlet valve is opened, tap water is through intake pipe 128, often drive main valve 14, connecting leg 125, the mesopore of rubber cushion 115 and support 114 enters expansion chamber 110, when the user closes the outlet valve of water heater, voltage rise height in the expansion chamber, piston 12 drives controlling rod 121 and moves to right, gear 13 backward rotation also descend, spool 116 is at self gravitation and compress rubber cushion 115 under the hydraulic action from the beginning, inlet valve is closed, piston stops to move, at this moment, when the water-heater water tank water temperature raises, press also in the expansion chamber and increase, piston is pushed away to the right, enter the virtual row stroke, the expansion chamber volume increases to absorb the value added of pressing in it, if rubber cushion damages or blocked by impurity, then also constantly has water to enter expansion chamber between rubber cushion and the spool, making to press in it increases, then piston is continued to shift onto the virtual row end of travel to the right, often opens tooth 141 on the switch lever of main valve 14 and falls into tooth bar 126 scopes on the controlling rod and meshing mutually, drives the switch lever motion of often driving main valve and closes up to will often driving main valve, at this moment, increase if the water tank water temperature raises to make to press in it, then piston enters the second virtual row stroke, continues to move right and presses value added in it to absorb, piston can not change the state of inlet valve and Chang Kai main valve yet when the second virtual row stroke motion; When next time, the user used water heater, drops in the expansion chamber, piston is moved to the left, and controlling rod drives the switch lever of often driving main valve and resets and the state shown in Figure 1 that opens it, and reduction valve is the same with normal operating condition;

Secondary spring

142 and 143 effect are among the figure, when piston moves in two virtual row strokes, switch lever front side or the rear side of often driving main valve can be contacted with the

plane

127 or 129 on the controlling rod, so that the tooth bar 126 on the controlling rod can be meshing with tooth 141 when being positioned at meshing position, frictional force for the plane 127,129 that reduces tooth 141 two ends and controlling rod, can add roller at two ends of tooth 141, have at this and do to state more; After if piston is closed when the second virtual row stroke and is often driven main valve, also be not enough to absorb the value added of pressing in the water tank, enter drainage area B to the right when then piston continues to move to certain position, outwards drain in the gap of water between piston and drainage area B in the expansion chamber, makes reduction valve play the effect of pressure release safety simultaneously; Controlling rod in the present embodiment lays respectively at the outside in the piston.

Drainage area among the embodiment one also can be designed as with piston seal and slides, but offers spilled water hole on the wall of drainage area, and when piston moved to the drainage area, the water in the expansion chamber was outwards drained through spilled water hole.

Embodiment two, and Fig. 3 is another embodiment's of a reduction valve described in the utility model structural representation.Present embodiment and embodiment's one difference is, present embodiment has been cancelled the gear 13 among the embodiment one, and directly back down the spool 23 of inlet valve with controlling rod 221, and, on the valve body 21 in the present embodiment drainage area is not set, its working principle is identical with embodiment one, does not do to state at this more.

Embodiment three, and Fig. 4 is another embodiment's of a reduction valve described in the utility model structural representation.The difference of present embodiment and the foregoing description is, its inlet valve 45 is stop valves, controlling rod 421 is provided with can be along the tooth bar 422 of controlling rod moving direction slip, tooth 451 on tooth on the tooth bar 422 and inlet valve 45 switch blocks is meshing, be provided with pressurize spring 423 between tooth bar and the controlling rod, often open the identical of the interactive relationship of main valve 44 and the lock of controlling rod 421 and embodiment one; When the controlling rod 421 of state among the figure is shifted to the right to inlet valve 45 and closes, tooth 451 on the switch block stops operating, and tooth bar 422 is also motionless, and controlling rod 421 compresses pressurize spring 423 and continues to move to right in order to enter the virtual row stroke, other and the foregoing description are similar, do not do to state at this more.

Embodiment four, and Fig. 5 is another embodiment's of a reduction valve described in the utility model structural representation.Present embodiment and embodiment's three difference is, being connected of valve rod 351 (being actually the switch lever of inlet valve) of controlling rod 321 and inlet valve 35, controlling rod is provided with the pushing block 36 that pushes away platform 325 and can slide along controlling rod moving direction, be provided with pressurize spring 361 between pushing block and the controlling rod, the valve rod 351 of inlet valve is at pushing block 36 and push away between the platform 325; When piston 32 entered the virtual row stroke, valve rod 351 was no longer swung, and pushing block 36 can not move yet, and controlling rod compression pressurize spring 361 is so that it enters the virtual row stroke.Other similar with embodiment three.

Embodiment five, and Fig. 6 is another embodiment's of a reduction valve described in the utility model structural representation.Present embodiment and embodiment three difference also are being connected of valve rod 651 of controlling rod 621 and inlet valve 65, after driving valve rod 651 during piston 62 right laterals in the shown position and closing inlet valve, valve rod 651 slides in the bayonet socket 625 of controlling rod 621 and slides on the plane 626, it is spacing and can not be to opening inlet valve direction swing to be slided the plane, controlling rod can continue right lateral, when the piston left lateral resets, slide plane 626 because of what the plane 624 of bayonet socket 625 rear sides was higher than the front side, enter in the bayonet socket 625 so valve rod 651 can reset under the effect of secondary spring 60.Other is identical with embodiment three.In order to reduce valve rod 651 and to slide frictional force between the plane 626, can add roller at valve rod 651 ends.

Embodiment six, and Fig. 7 is another embodiment's of a reduction valve described in the utility model structural representation.As can be seen from Fig. 7, described inlet valve 75 also is a stop valve, inlet valve 75 and often drive main valve 74 and be serially connected between intake pipe 711 and the expansion chamber 710, controlling rod 721 is provided with and can or often opens the meshing tooth bar 722 of tooth 742 on the switch block on the main valve 74 with tooth 751 on the fan-shaped switch block of inlet valve 75, state is a holding state among the figure, switch block one end of inlet valve 75 is pushed down the plane 723 of controlling rod 721, when water heater uses, piston 72 left lateral, tooth bar 722 left lateral are also meshing with it to tooth 751 places of inlet valve switch block, controlling rod drives switch block opens inlet valve, when stopping using water heater, the piston right lateral is to shown position, tooth bar 722 separates the back with tooth 751 spacing and can not be to opening the rotation of inlet valve direction by plane 723, when piston entered virtual row stroke continuation right lateral, tooth bar 722 changed into the tooth of often opening on the main valve switch block 742 meshing, drives its rotation and often drives main valve 74 to close.Its working principle and embodiment one are similar, do not do to state at this more.

When often driving main valve and being solenoid valve, embodiment is comparatively simple, and those skilled in the art all can implement on the utility model basis, are not described in detail in this.

Reference character in the various embodiments described above is asked for an interview above-mentioned " mark among the figure ... " one section.

Controlling rod also can be used to control inlet valve to often opening the control mode of main valve among the embodiment three in addition, and this is that those skilled in the art are all attainable on the utility model basis.

Claims

1, a kind of reduction valve comprises valve body and inlet valve; It is characterized in that surrounding expansion chamber between body cavity and the expansion wall, be provided with pressure spring between expansion wall and the valve body and make expansion wall be subjected to inside spring force, be fixed with controlling rod on the expansion wall, expansion chamber communicates with water outlet; Inlet valve is arranged on the intake tunnel between described expansion chamber and the water intake, and the on off state of inlet valve is controlled by described controlling rod; Intake tunnel between described expansion chamber and the water intake is provided with often drives main valve, and the on off state of often driving main valve is controlled by described controlling rod.

2, according to the described reduction valve of claim 1, it is characterized in that described expansion wall is a piston, piston and body cavity match.

3,, it is characterized in that described body cavity is provided with the drainage area by opening according to the described reduction valve of claim 2.

4, according to the described reduction valve of claim 2, it is characterized in that described body cavity is provided with the drainage area by opening, the valve body wall at place, drainage area is provided with spilled water hole.

5, according to the described reduction valve of claim 1, it is characterized in that described inlet valve is made up of water inlet, spool and Returnning spring, the water inlet is arranged on the jointing place of described expansion chamber and intake tunnel, and spool is positioned at intake tunnel one side.

6, according to the described reduction valve of claim 1, it is characterized in that described inlet valve is a stop valve, the tooth that described controlling rod is provided with on the fan-shaped switch block of tooth bar and stop valve is mutually meshing.

7, according to the described reduction valve of claim 1, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with can be along the tooth bar of controlling rod moving direction slip, and the tooth on this tooth bar and the stop valve switch block is meshing, is provided with the pressurize spring between described tooth bar and the controlling rod.

8, according to the described reduction valve of claim 1, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with the pushing block that pushes away platform and can slide along controlling rod moving direction, be provided with the pressurize spring between pushing block and the controlling rod, and the valve rod of stop valve is at pushing block and push away between the platform.

9, according to the described reduction valve of claim 1, it is characterized in that described inlet valve is a stop valve, described controlling rod is provided with bayonet socket.

10, according to the described reduction valve of claim 1, it is characterized in that the described main valve of often opening is a solenoid valve, described valve body is provided with the solenoid valve trigger switch that is subjected to described controlling rod control.