CN204985901U - Pressure -limiting valve - Google Patents

Pressure -limiting valve Download PDF

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Publication number
CN204985901U
CN204985901U CN201520521988.6U CN201520521988U CN204985901U CN 204985901 U CN204985901 U CN 204985901U CN 201520521988 U CN201520521988 U CN 201520521988U CN 204985901 U CN204985901 U CN 204985901U
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pressure
piston
valve
piston rod
inner chamber
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CN201520521988.6U
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Chinese (zh)
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翁达伟
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翁达伟
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Abstract

The utility model discloses a pressure -limiting valve, include: be equipped with valve body (1) of delivery port (14), be equipped with valve gap (2) of water inlet (24), valve body (1) with valve gap (2) are sealed to link to each other and a middle part formation inner chamber (13) be equipped with in inner chamber (13) can inner chamber (13) interior axial motion's piston (3), piston (3) comprise piston seat (31) and piston rod (32) that link to each other piston rod (32) are gone up the cover and are established spring (5), the center of piston (3) is equipped with the intercommunication through -hole (33) of delivery port (14), valve gap (2) be equipped with the diameter with terminal diameter unanimous guide slot (29) are gone up in piston rod (32), guide slot (29) intercommunication water inlet (24), the terminal setting is gone up in piston rod (32) among guide slot (29). The utility model has the advantages of simple structure, with low costs, the reliable operation and extensively applicable of realization.

Description

A kind of pressure-limit valve
Technical field
The utility model relates to a kind of valve, especially relates to a kind of automatic adjusting water outlet pressure, for supplying the pressure-limit valve of steady pressure by water extraction.
Background technique
Pressure-limit valve has another name called pressure maintaining valve, decompression venting valve.Pressure-limit valve is that the aperture of the open-shut device adopted in control valve body is to regulate the flow of medium; the pressure of medium is reduced; simultaneously by the aperture of the effect adjustment open-shut device of downstream pressure; downstream pressure is kept within the specific limits; when inlet pressure constantly changes; keep outlet pressure in the scope of setting, utensil is produced in protection life thereafter.
Existing pressure-limit valve is of a great variety, and structure is also ever-changing.With the watering equipments such as sanitaryware (such as water heater liner) arrange in pairs or groups use time; require that pressure-limit valve working stability is reliable; and existing pressure limiting valve structure is complicated; and when the water outlet of watering equipment is plugged; then this pressure-limit valve cannot play pressure limiting effect, fails really to reach the object of voltage-limiting protection device product.
Model utility content
For overcoming the defect of prior art, a kind of structure of proposition of the present utility model is simple, it is reliable to use and can limit the pressure-limit valve of maximum hydraulic pressure.
The utility model adopts following technological scheme to realize: a kind of pressure-limit valve, it comprises: the valve body being provided with water outlet, be provided with the valve gap of water intake, described valve body is connected with described valve bonnet seal and middle part forms inner chamber, being provided with in described inner chamber can the piston of axial motion in described inner chamber, described piston is made up of the piston seat be connected and piston rod, spring is established at described upper cover of piston rod, the center of described piston is provided with the through hole being communicated with described water outlet, described valve gap is provided with the diameter guide groove consistent with end diameter on described piston rod, described guide groove is communicated with described water intake, on described piston rod, end is arranged among described guide groove.
Wherein, the diameter of described piston seat is consistent with the diameter of described inner chamber, and described piston seat is provided with circular groove, arranges the first seal ring among described circular groove.
Wherein, described valve body is arranged the exhaust port being communicated with described inner chamber.
Wherein, described valve gap is provided with sealing gasket, and described sealing gasket is positioned at the axially top of described piston rod.
Wherein, described sealing gasket is fixed on valve gap by fixing part.
Wherein, described guide groove is provided with the second receiving cavity, arranges the second seal ring in described second receiving cavity, and the internal diameter of described second seal ring is consistent with the diameter of end on described stopper rod of living.
Wherein, the quantity of described water intake is 8-24 and rounded spread configuration.
Wherein, the quantity of described water intake is 12.
Wherein, described water intake is inclined hole.
Wherein, described valve body and described valve gap are screwed together, and described valve body and described valve gap are respectively equipped with the internal thread and outside thread that are connected with outer water tube.
Compared with prior art, the utility model has following beneficial effect:
The pressure-limit valve that the utility model proposes can limit the highest hydraulic pressure flowing through current dynamically; even if still can limit the hydraulic pressure of water outlet when water outlet is plugged; real hydraulic pressure voltage-limiting protection effect is played to watering equipment (such as water heater liner etc.), makes watering equipment can not cause damage because water supply pressure is excessive.The utility model limits maximum limit pressure pressure by selecting different springs, and pressure limiting accurately and reliable operation.In addition, pressure-limit valve of the present utility model have structure simple, realize the low and advantage such as widely applicable of cost.
Accompanying drawing explanation
Fig. 1 is the stereo decomposing structural representation of the utility model pressure-limit valve.
Fig. 2 is the three-dimensional assembling structure schematic diagram of the utility model pressure-limit valve.
Fig. 3 is the generalized section of A-A in Fig. 2.
Fig. 4 is the plan view of valve gap.
Fig. 5 is the B-B generalized section of valve gap.
Embodiment
Shown in composition graphs 1, Fig. 2 and Fig. 3, the pressure-limit valve that the utility model proposes comprises: the valve body 1 being provided with water outlet 14, and two ends of this valve body 1 all have internal thread 11, and the lower end of this valve body 1 is connected with water outlet water pipe (not shown in FIG.); There is the valve gap 2 of two sections of outside threads (being the first outside thread 21 and the second outside thread 22 respectively), screw togather fixing between the internal thread of this valve gap 2 by end on the first outside thread 21 and valve body 1, and valve gap 2 is connected with water inlet water pipe (not shown in FIG.) by the second outside thread 22; Be formed as the inner chamber 13 of cavity between valve body 1 and valve gap 2, and be provided with piston 3 among this inner chamber 13, this piston 3 has connected piston seat 31 and piston rod 32, and the center of piston rod 32 and piston seat 31 arranges a through hole 33, and this through hole 33 is communicated with water outlet 14; In addition, piston seat 31 is arranged circular groove 311, the first seal ring 4 is set among this circular groove 311, and the diameter of piston seat 31 is consistent with the diameter of inner chamber 13; Valve body 1 arranges the exhaust port 12 of communication with cavity 13, and exhaust port 12 is for keeping in movement process in inner chamber 13 at piston 3; Be set in the spring 5 on piston rod 32; Be arranged on the sealing gasket 8 of valve gap 2, sealing pad 8 is fixed on valve pocket 2 by fixing part 7 and is positioned at directly over piston rod 32, and namely sealing gasket 8 is positioned at the axially top of end on piston rod 32.
Shown in composition graphs 4 and Fig. 5, specifically, valve gap 2 also comprises: for the fixed hole 25 of accommodating fixing part 7 and the first receiving cavity 26 of accommodation sealing gasket 8; 8-24 water intake 24 of rounded arrangement; The water containing chamber 27 be connected with each water intake 24, this water containing chamber 27 is communicated with the inner chamber 13 of valve body 1 by guide groove 29, and this guide groove 29 is circular groove and its diameter is consistent with the diameter of piston rod 32 upper end, and the upper end of piston rod 32 is positioned among guide groove 29; Guide groove 29 arranges the second receiving cavity 28 that relative diameter is larger, arranges the second seal ring 6 in this second receiving cavity 28, the internal diameter of this second seal ring 6 is consistent with the diameter of end on piston rod 32.
Such as, fixing part 7 is a screw, and fixed hole 25 is a screw, is screwed in screw is fixed on by sealing gasket 8 on valve pocket 2 and directly over piston rod 32 by screw.
In a preferred embodiment, valve gap 2 is provided with 12 water intakes 24 of rounded arrangement, and water intake 24 is inclined hole.
The working principle of the utility model pressure-limit valve is as follows: 1. when the intake pressure of the water intake 24 of valve gap 2 is less than setting value, current are from the through hole 33 that water intake 24 flows through water containing chamber 27 successively, guide groove 29 enters piston 3, and discharge from the water outlet 14 of through hole 33 through valve body 1, now the hydraulic pressure of the water outlet 14 of valve body 1 is also less than setting value, and the inner chamber 13 that piston 3 is positioned at valve body 1 keeps motionless, 2. when the intake pressure of the water intake 24 when valve gap 2 is more than or equal to setting value, now the hydraulic pressure of the water outlet 14 of valve body 1 is also more than or equal to setting value, piston seat 31 lifting surface area of hydraulic pressure to piston 3 is larger, promote piston 3 Compress Spring 5 to move towards valve gap 2, stop motion piston rod 32 also conflicts sealing gasket 8 along guide groove 29 during through water containing chamber 27, what now sealing gasket 8 was tight blocked through hole 33 makes the water in water containing chamber 27 cannot enter the through hole 33 at piston 3 center, and the second seal ring 6 makes the water in water containing chamber 27 cannot enter inner chamber 13 with piston rod 32 tight connecting, thus water intake 24 stops water inlet, until when the hydraulic pressure of water outlet 14 declines, the stressed reduction of piston seat 31 and be less than spring 5 by compression produce elastic force, piston 3 starts to move towards the direction away from valve gap 2, thus current can be discharged by the water outlet 14 of through hole 33 through valve body 1 again, thus reach the effect of the highest discharge pressure of restriction water outlet 14.
The pressure-limit valve application that the utility model proposes is very extensive.Such as, be arranged on the water pipe line of the products such as water heater, reach the effect of current limiting pressure-limiting when water feeding pressure is excessive, available protecting water heater liner hydraulic pressure is in safe hydraulic pressure, the normal use of protection water heater liner.Again such as, the pressure-limit valve that the utility model proposes can also coordinate safety valve to use, and when hydraulic pressure can be prevented excessive, safety valve can continuous pressure release draining and waste water resource.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. a pressure-limit valve, it is characterized in that, described pressure-limit valve comprises: the valve body (1) being provided with water outlet (14), be provided with the valve gap (2) of water intake (24), described valve body (1) and described valve gap (2) seal and to be connected and middle part forms inner chamber (13), being provided with in described inner chamber (13) can the piston (3) of axial motion in described inner chamber (13), described piston (3) is made up of the piston seat be connected (31) and piston rod (32), at the upper sheathed spring (5) of described piston rod (32), the center of described piston (3) is provided with the through hole (33) being communicated with described water outlet (14), described valve gap (2) is provided with the diameter guide groove (29) consistent with the upper end diameter of described piston rod (32), described guide groove (29) is communicated with described water intake (24), the upper end of described piston rod (32) is arranged among described guide groove (29).
2. a kind of pressure-limit valve according to claim 1, it is characterized in that, the diameter of described piston seat (31) is consistent with the diameter of described inner chamber (13), described piston seat (31) is provided with circular groove (311), arranges the first seal ring (4) among described circular groove (311).
3. a kind of pressure-limit valve according to claim 1, is characterized in that, described valve body (1) is arranged the exhaust port (12) being communicated with described inner chamber (13).
4. a kind of pressure-limit valve according to claim 1, is characterized in that, described valve gap (2) is provided with sealing gasket (8), and described sealing gasket (8) is positioned at the axially top of described piston rod (32).
5. a kind of pressure-limit valve according to claim 4, is characterized in that, described sealing gasket (8) is fixed on valve gap (2) by fixing part (7).
6. a kind of pressure-limit valve according to claim 1, it is characterized in that, described guide groove (29) is provided with the second receiving cavity (28), arrange the second seal ring (6) in described second receiving cavity (28), the internal diameter of described second seal ring (6) is consistent with the diameter of the upper end of described stopper rod (32) of living.
7. a kind of pressure-limit valve according to claim 1, is characterized in that, the quantity of described water intake (24) is 8-24 and rounded spread configuration.
8. a kind of pressure-limit valve according to claim 7, is characterized in that, the quantity of described water intake (24) is 12.
9. a kind of pressure-limit valve according to claim 1, is characterized in that, described water intake (24) is inclined hole.
10. a kind of pressure-limit valve according to claim 1, it is characterized in that, described valve body (1) and described valve gap (2) are screwed together, and described valve body (1) is respectively equipped with described valve gap (2) internal thread and outside thread that are connected with outer water tube.
CN201520521988.6U 2015-07-17 2015-07-17 Pressure -limiting valve Active CN204985901U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520521988.6U CN204985901U (en) 2015-07-17 2015-07-17 Pressure -limiting valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520521988.6U CN204985901U (en) 2015-07-17 2015-07-17 Pressure -limiting valve

Publications (1)

Publication Number Publication Date
CN204985901U true CN204985901U (en) 2016-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520521988.6U Active CN204985901U (en) 2015-07-17 2015-07-17 Pressure -limiting valve

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CN (1) CN204985901U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286922A (en) * 2016-10-27 2017-01-04 泸州江阳超能燃气有限责任公司 A kind of decompressor for compressed natural gas pressure-reducing gas
CN111043369A (en) * 2019-11-26 2020-04-21 西安航天动力研究所 Pressure reducing regulating valve with inlet variable flow limiting buffer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286922A (en) * 2016-10-27 2017-01-04 泸州江阳超能燃气有限责任公司 A kind of decompressor for compressed natural gas pressure-reducing gas
CN106286922B (en) * 2016-10-27 2018-08-17 泸州江阳超能燃气有限责任公司 A kind of pressure reducer for compressed natural gas pressure-reducing gas
CN111043369A (en) * 2019-11-26 2020-04-21 西安航天动力研究所 Pressure reducing regulating valve with inlet variable flow limiting buffer
CN111043369B (en) * 2019-11-26 2021-07-20 西安航天动力研究所 Pressure reducing regulating valve with inlet variable flow limiting buffer

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