CN205036887U - Waterway control valve structure - Google Patents

Waterway control valve structure Download PDF

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Publication number
CN205036887U
CN205036887U CN201520696146.4U CN201520696146U CN205036887U CN 205036887 U CN205036887 U CN 205036887U CN 201520696146 U CN201520696146 U CN 201520696146U CN 205036887 U CN205036887 U CN 205036887U
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CN
China
Prior art keywords
diaphragm
water
communicated
spool
axle sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201520696146.4U
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Chinese (zh)
Inventor
鲍伟军
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Quanzhou Zongneng Solenoid Valve Co Ltd
Original Assignee
Quanzhou Zongneng Solenoid Valve Co Ltd
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Application filed by Quanzhou Zongneng Solenoid Valve Co Ltd filed Critical Quanzhou Zongneng Solenoid Valve Co Ltd
Priority to CN201520696146.4U priority Critical patent/CN205036887U/en
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Publication of CN205036887U publication Critical patent/CN205036887U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses a waterway control valve structure, including the valve body that has water inlet and delivery port, install the case external member in the valve body, diaphragm pressing cover and axle sleeve, be formed with the via hole between water inlet and the delivery port, diaphragm pressing cover installs the top in the case external member, the case external member sets up the top at the via hole, top -down is by rubber diaphragm for the case external member, valve element and stagnant water rubber pad are constituteed, inlet duct has been seted up in the valve element, inlet duct and water inlet intercommunication, valve element's lower extreme card is equipped with a stagnant water rubber pad, the stagnant water rubber pad contacts with the last end face seal of via hole, valve element's upper end card is equipped with a rubber diaphragm, rubber diaphragm and diaphragm pressing cover's lower surface sealing connection are in the same place, form the water -pressure balance chamber between rubber diaphragm and the diaphragm pressing cover. The utility model relates to a waterway control valve structure, structural design is reasonable, not only can avoid producing the water hammer vibration, and seal pressure is strong moreover, and the life of product is longer.

Description

A kind of waterway controlling valve structure
Technical field
The utility model relates to a kind of waterway controlling valve structure.
Background technique
The contactless autocontrol valve of the many employings of existing domestic water product controls, water hammer chatter is easily there is when product is closed, when hydraulic pressure is too high, product water supply hose all vibrates to obtain spring, particularly the user that lives of multi-storey building is when using water in the dead of night, and the noise of its water hammer vibration reaches the degree disturbed residents.A kind of solenoid valve seat without water hammer chatter of Chinese invention patent application and waterway structure (number of patent application is 201210438334.8), by solenoid valve, solenoid valve seat, valve seat cylinder barrel, valve matrix, water inlet pressurized ring connects to form, the structural change of solenoid valve valve matrix being closed water outlet becomes solenoid valve valve matrix to close the structure of water inlet, due to the impetus of the intake pressure of water inlet, the speed of prevention or the descending closedown of valve matrix of having slowed down, effectively reduce or avoid the water hammer vibration that valve matrix produces because of clickly quick closedown once, reduce the vibration noise that domestic water product produces when closing.
But in this patent application, there is following defect in arranging of valve matrix: (1) is although its water outlet is provided with some ribs to protect valve diaphragm, but enough protections can not be provided, valve diaphragm has the risk being extruded intake-outlet, and can collision be produced with water outlet, easily damaged; (2) this patent application can not stop the generation of water hammer completely, although can not produce water hammer between valve diaphragm and water intake, can collide, easily produce water hammer between valve diaphragm and water outlet; (3) this patent application is poor for applicability, excesssive gap when between rib, and valve diaphragm is fragile, and when rib gap is too small, water flow again can be very little, so be only applicable to the solenoid valve of low hydraulic pressure small flow, is not suitable for the solenoid valve of high hydraulic pressure or large discharge requirement.
Model utility content
The purpose of this utility model is to provide a kind of waterway controlling valve structure, reasonable in design, can not only avoid producing water hammer vibration, and voltage endurance capability is strong, and the working life of product is longer.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of waterway controlling valve structure, comprise the valve body with water intake and water outlet, be arranged on the spool external member in described valve body, diaphragm gland and axle sleeve, via hole is formed between described water intake and described water outlet, described diaphragm gland is arranged on the top of described spool external member, described spool external member is arranged on the top of described via hole, described spool external member is from top to bottom by elastomer diaphragm, spool main body and watertight rubber pad composition, offer in described spool main body into water duct, described water inlet duct is communicated with described water intake, the lower end of described spool main body is arranged with a watertight rubber pad, described watertight rubber pad seals with the upper-end surface of described via hole and contacts, the upper end of described spool main body is arranged with an elastomer diaphragm, the lower surface of described elastomer diaphragm and described diaphragm gland is sealed connected together, water pressure balance cavity is formed between described elastomer diaphragm and described diaphragm gland, the waterexit end in described water inlet duct is communicated with described water pressure balance cavity, the pod apertures be communicated with described water pressure balance cavity is provided with in described diaphragm gland, the relief hole isolated with described pod apertures is provided with in described diaphragm gland, in described diaphragm gland, its radial direction is provided with pressure relief water circulation road, the water intake of described pressure relief water circulation road is communicated with described relief hole, and the water outlet of described pressure relief water circulation road is arranged on the sidewall of described diaphragm gland, described axle sleeve is set in outside described elastomer diaphragm, the limited step establishing described axle sleeve for card is provided with in described valve body, flowing hole is provided with in described axle sleeve, one end of described flowing hole is communicated with the water outlet of described pressure relief water circulation road, and the other end of described flowing hole is communicated with the water outlet of described valve body.
Described elastomer diaphragm is yi word pattern elastomer diaphragm or L-type elastomer diaphragm or U-shaped elastomer diaphragm.
Described axle sleeve has the diaphragm collar being positioned at described axle sleeve top and the spool collar being positioned at described axle sleeve bottom, the described diaphragm collar and the described spool collar one-body molded, it is outer and fit together with the outer side wall of described elastomer diaphragm that the described diaphragm collar is set in described elastomer diaphragm, the upper-end surface of described axle sleeve and the lower limb of described elastomer diaphragm are sealed connected together, described valve core housing ring set is located at outside described spool main body, the position of the corresponding described spool collar of described axle sleeve stretches out and is provided with annular flange flange, described annular flange flange is fastened on the limited step of described valve body.
Described pressing diaphragm covers and is provided with a boss, and the feed-water end of described pod apertures is communicated with described water pressure balance cavity, and the waterexit end of described pod apertures is arranged on described boss.
Be provided with the self-cleaning pin preventing described water inlet duct from blocking in described water inlet duct, the top of described self-cleaning pin is fixed on described pressing diaphragm and covers.
A kind of waterway controlling valve structure, also comprise the solenoid valve seat that solenoid valve is arranged on described solenoid valve base, solenoid valve iron core and pressure release mouth is provided with in described solenoid valve, the bottom of described solenoid valve iron core is provided with the iron core caulking gum sealing described pressure release mouth, the top sealing with the upper surface of described diaphragm gland that described pressure release mouth is arranged on described diaphragm gland contacts, drainage channel is provided with in described pressure release mouth, one end of described drainage channel is communicated with the waterexit end of described pod apertures, the other end of described drainage channel is communicated with described relief hole, described solenoid valve seat is set in outside described diaphragm gland.
Have gap between the sidewall of described solenoid valve seat and described diaphragm gland, one end of described flowing hole is communicated with by the water outlet of this gap with described pressure relief water circulation road.
After adopting said structure, a kind of waterway controlling valve structure of the utility model, spool external member is by sealing via hole thus playing seal action to water intake, water pressure balance cavity is filled full water by the water inlet duct of spool main body by water, when relief hole is in open mode, water in water pressure balance cavity flows to relief hole and pressure relief water circulation road successively by the pod apertures that pressing diaphragm covers, the flowing hole of axle sleeve is flowed into again through pressure relief water circulation road, the water outlet of valve body is flowed to finally by flowing hole, now, because the pressure of water pressure balance cavity is drained decompression, the pressure of water pressure balance cavity and the intake pressure of water intake define an obvious pressure difference, pressure in water pressure balance cavity is less than the intake pressure of water intake, under the promotion of intake pressure, spool external member moves up, the water intake of valve body is connected with water outlet, water route is opened completely, when relief hole is in sealing state, sub-fraction water flows to water pressure balance cavity water inlet supercharging by the water inlet duct of spool main body, water in water pressure balance cavity is drained nowhere, pressure in water pressure balance cavity increases gradually, promoting spool external member gradually moves down until close water intake, realize the object that water route is closed.In the utility model, on the one hand, spool external member is adopted to be sealed into the structure at the mouth of a river, when water route is closed, because the intake pressure of water intake also exists impetus to spool external member, prevention or the spool external member that slowed down move down the speed of closedown, effectively reduce or avoid the water hammer vibration that spool external member produces because of quick closedown; On the other hand; adopt between spool main body with watertight rubber pad to fix and be connected; when watertight rubber pad is subject to the intake pressure effect of water intake; watertight rubber pad can be securely fixed in spool main body, is not easily shifted, in addition; axle sleeve is arranged with outside elastomer diaphragm; protection and fixation are played to elastomer diaphragm, the voltage endurance capability of elastomer diaphragm can be improved like this, the phenomenon that elastomer diaphragm displacement occurs can be avoided again.
Therefore, a kind of waterway controlling valve structure of the utility model, reasonable in design, can not only avoid producing water hammer vibration, and voltage endurance capability is strong, the working life of product is longer.
Further, the self-cleaning pin preventing described water inlet duct from blocking is provided with in described water inlet duct, described self-cleaning pin can be freely movable in described water inlet duct, and make water can enter into described water inlet duct, the setting of self-cleaning pin can extend the working life of spool main body.
Accompanying drawing explanation
Fig. 1 be the utility model in off position time sectional structure chart;
Fig. 2 is the sectional structure chart of A in Fig. 1;
Fig. 3 is the sectional structure chart of the utility model when opening state.
In figure:
Valve body 1 water intake 11
Water outlet 12 via hole 13
Limited step 14 spool external member 2
Elastomer diaphragm 21 step 211
Spool main body 22 projection 221
Equalizing orifice 222 watertight rubber pad 23
The self-cleaning pin 241 in water inlet duct 24
Diaphragm gland 3 pod apertures 31
Boss 32 relief hole 321
Pressure relief water circulation road 322 raised line 33
Axle sleeve 4 annular flange flange 41
Flowing hole 42 water pressure balance cavity 5
Solenoid valve 6 pressure release mouth 61
Drainage channel 611 iron core caulking gum 62
Solenoid valve seat 7
Embodiment
In order to explain the technical solution of the utility model further, below by specific embodiment, the utility model is elaborated.
A kind of waterway controlling valve structure, as Figure 1-Figure 2, comprise with water intake 11 and the valve body 1 of water outlet 12, the spool external member 2 be arranged in valve body 1, diaphragm gland 3 and axle sleeve 4, via hole 13 is formed between water intake 11 and water outlet 12, diaphragm gland 3 is arranged on the top of spool external member 2, and spool external member 2 is arranged on the top of via hole 13.
Spool external member 2 is made up of elastomer diaphragm 21, spool main body 22 and watertight rubber pad 23 from top to bottom, offer in spool main body 22 into water duct 24, the bottom of spool main body 22 has a projection 221, the lower end of projection 221 offers equalizing orifice 222, one end of equalizing orifice 222 is communicated with water intake 11, and the other end of equalizing orifice 222 is communicated with water inlet duct 24.U-shaped depressed part is offered between the sidewall of projection 221 and spool main body 22, watertight rubber pad 23 is arranged in this U-shaped depressed part, this watertight rubber pad 23 seals with the upper-end surface of via hole 13 and contacts, the top of spool main body 22 is provided with annular groove, elastomer diaphragm 21 is fastened in this annular groove, this elastomer diaphragm 21 is U-shaped elastomer diaphragm, and the top edge of elastomer diaphragm 21 and the lower surface of diaphragm gland 3 are sealed connected together.Elastomer diaphragm 21 can be also yi word pattern elastomer diaphragm or L-type elastomer diaphragm, but from sealing effect, the sealing effect of U-shaped elastomer diaphragm is better.
The axial centre of elastomer diaphragm 21 offers circular hole, an annular flange flange is formed on the week edge of circular hole, step 211 is formed between this annular flange flange and sidewall of circular hole, the existence of this step 211 makes elastomer diaphragm 21 can be fastened in annular groove, U-groove bevel is formed between the outer side wall of annular flange flange and elastomer diaphragm 21, diaphragm gland 3 offers groove on the surface of elastomer diaphragm 21, therefore the U-groove bevel of elastomer diaphragm 21 and the groove of diaphragm gland 3 form water pressure balance cavity 5 jointly, and the waterexit end in water inlet duct 24 is communicated with water pressure balance cavity 5.
Pod apertures 31 is provided with in diaphragm gland 3, the top of diaphragm gland 3 is provided with a boss 32, the feed-water end of pod apertures 31 is communicated with water pressure balance cavity 5, the waterexit end of pod apertures 31 is arranged on boss 32, the central position of boss 32 offers the relief hole 321 isolated with pod apertures 31, in boss 32, its radial direction is provided with pressure relief water circulation road 322, the water intake of pressure relief water circulation road 322 is communicated with relief hole 321, and the water outlet of pressure relief water circulation road 322 is arranged on the sidewall of boss 32, the solenoid valve seat 7 that this waterway controlling valve structure also comprises solenoid valve 6 and is arranged on bottom solenoid valve 6, solenoid valve iron core and pressure release mouth 61 is provided with in solenoid valve 6, the bottom of solenoid valve iron core is provided with the iron core caulking gum 62 of sealing pressure release mouth 61, the top sealing with the upper surface of diaphragm gland 3 that pressure release mouth 61 is arranged on diaphragm gland 3 contacts, drainage channel 611 is provided with in pressure release mouth 61, one end of drainage channel 611 is communicated with the waterexit end of pod apertures 31, the other end of drainage channel 611 is communicated with relief hole 321, solenoid valve seat 7 is set in outside diaphragm gland 3, and for installing solenoid valve 6, namely pod apertures 31 communicates with water pressure balance cavity 5, communicate with the drainage channel 611 of pressure release mouth 61, relief hole 321 does not communicate with water pressure balance cavity 5, pod apertures 31 does not communicate with relief hole 321.
Axle sleeve 4 has the diaphragm collar being positioned at axle sleeve 4 top and the spool collar being positioned at axle sleeve 4 bottom, the diaphragm collar and the spool collar one-body molded, it is outer and fit together with the outer side wall of elastomer diaphragm 21 that the diaphragm collar is set in elastomer diaphragm 21, the upper-end surface of axle sleeve 4 and the lower limb of elastomer diaphragm 21 are sealed connected together, axle sleeve 4 pairs of elastomer diaphragms 21 play a protective role, such setting is to prevent elastomer diaphragm 21 excessive tensile distortion under the pressure effect of water, ensure the working life of elastomer diaphragm 21, valve core housing ring set is located at outside spool main body 22, the position of the corresponding spool collar of axle sleeve 4 stretches out and is provided with annular flange flange 41, limited step 14 is provided with in valve body 1, annular flange flange 41 is fastened on this limited step 14.At least one flowing hole 42 is vertically provided with in the sidewall of axle sleeve 4, between the sidewall of solenoid valve seat 7 and diaphragm gland 3, there is gap, one end of flowing hole 42 is communicated with by the water outlet of this gap with pressure relief water circulation road 322, and the other end of flowing hole 42 is communicated with the water outlet 12 of valve body 1.
After adopting said structure, a kind of waterway controlling valve structure of the utility model, as shown in Figure 1-Figure 3, spool external member 2 is by sealing via hole 13, thus seal action is played to water intake 11, water pressure balance cavity 5 is filled full water by the water inlet duct 24 in spool main body 22 by water, when solenoid valve 6 is opened, solenoid valve iron core rises, iron core caulking gum 62 departs from pressure release mouth 61, drainage channel 611 is in open mode, water in water pressure balance cavity 5 flows into the drainage channel 611 in pressure release mouth 61 by the pod apertures 31 on diaphragm gland 3, relief hole 321 and pressure relief water circulation road 322 is flowed to successively again via drainage channel 611, then the flowing hole 42 of axle sleeve 4 is flowed into through pressure relief water circulation road 322, the water outlet 12 of valve body 1 is flowed to finally by flowing hole 42, now, because the pressure of water pressure balance cavity 5 is drained decompression, the pressure of water pressure balance cavity 5 and the intake pressure of water intake 11 define an obvious pressure difference, pressure in water pressure balance cavity 5 is less than the intake pressure of water intake 11, under the promotion of intake pressure, spool external member 2 moves up, the water intake 11 of valve body 1 is connected with water outlet 12, water route is opened completely, when solenoid valve 6 cuts out, solenoid valve iron core declines, the drainage channel 611 of pressure release mouth 61 blocks by iron core caulking gum 62, the same time, sub-fraction water flows to water pressure balance cavity 5 by the water inlet duct 24 in spool main body 22 and to intake supercharging, and the water in water pressure balance cavity 5 is drained nowhere, and the pressure in water pressure balance cavity 5 increases gradually, promote spool external member 2 gradually to move down until close water intake 11, realize the object that water route is closed.
In the utility model, on the one hand, spool external member 2 is adopted to be sealed into the structure at the mouth of a river 11, when water route is closed, because the intake pressure of water intake 11 also exists impetus to spool external member 2, prevention or the spool external member 2 that slowed down move down the speed of closedown, effectively reduce or avoid the water hammer vibration that spool external member 2 produces because of quick closedown; On the other hand; adopt between spool main body 22 with watertight rubber pad 23 to fix and be connected; when watertight rubber pad 23 is subject to the intake pressure effect of water intake 11; watertight rubber pad 23 can be securely fixed in spool main body 22, is not easily shifted, in addition; axle sleeve 4 is arranged with outside elastomer diaphragm 21; protection and fixation are played to elastomer diaphragm 21, the voltage endurance capability of elastomer diaphragm 21 can be improved like this, the phenomenon that elastomer diaphragm 21 displacement occurs can be avoided again.Therefore, a kind of waterway controlling valve structure of the utility model, reasonable in design, can not only avoid producing water hammer vibration, and voltage endurance capability is strong, the working life of product is longer.
Further, the self-cleaning pin 241 preventing from blocking into water duct 24 is provided with in water inlet duct 24, the top of self-cleaning pin 241 in the shape of a spiral, the inside top of diaphragm gland 3 is provided with the raised line 33 to downward-extension, the top of self-cleaning pin 241 is wrapped on this raised line 33, thus be fixed on diaphragm gland 3, between self-cleaning pin 241 and the sidewall of equalizing orifice 222, there is gap, self-cleaning pin 241 can be freely movable in water inlet duct 24 and equalizing orifice 222, make water can enter into into water duct 24 from equalizing orifice 222, the setting of self-cleaning pin 241 can extend the working life of spool main body 22.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.

Claims (7)

1. a waterway controlling valve structure, comprise the valve body with water intake and water outlet, be arranged on the spool external member in described valve body, diaphragm gland and axle sleeve, it is characterized in that: between described water intake and described water outlet, be formed with via hole, described diaphragm gland is arranged on the top of described spool external member, described spool external member is arranged on the top of described via hole, described spool external member is from top to bottom by elastomer diaphragm, spool main body and watertight rubber pad composition, offer in described spool main body into water duct, described water inlet duct is communicated with described water intake, the lower end of described spool main body is arranged with a watertight rubber pad, described watertight rubber pad seals with the upper-end surface of described via hole and contacts, the upper end of described spool main body is arranged with an elastomer diaphragm, the lower surface of described elastomer diaphragm and described diaphragm gland is sealed connected together, water pressure balance cavity is formed between described elastomer diaphragm and described diaphragm gland, the waterexit end in described water inlet duct is communicated with described water pressure balance cavity, the pod apertures be communicated with described water pressure balance cavity is provided with in described diaphragm gland, the relief hole isolated with described pod apertures is provided with in described diaphragm gland, in described diaphragm gland, its radial direction is provided with pressure relief water circulation road, the water intake of described pressure relief water circulation road is communicated with described relief hole, and the water outlet of described pressure relief water circulation road is arranged on the sidewall of described diaphragm gland, described axle sleeve is set in outside described elastomer diaphragm, the limited step establishing described axle sleeve for card is provided with in described valve body, flowing hole is provided with in described axle sleeve, one end of described flowing hole is communicated with the water outlet of described pressure relief water circulation road, and the other end of described flowing hole is communicated with the water outlet of described valve body.
2. a kind of waterway controlling valve structure according to claim 1, is characterized in that: described elastomer diaphragm is yi word pattern elastomer diaphragm or L-type elastomer diaphragm or U-shaped elastomer diaphragm.
3. a kind of waterway controlling valve structure according to claim 1, it is characterized in that: described axle sleeve has the diaphragm collar being positioned at described axle sleeve top and the spool collar being positioned at described axle sleeve bottom, the described diaphragm collar and the described spool collar one-body molded, it is outer and fit together with the outer side wall of described elastomer diaphragm that the described diaphragm collar is set in described elastomer diaphragm, the upper-end surface of described axle sleeve and the lower limb of described elastomer diaphragm are sealed connected together, described valve core housing ring set is located at outside described spool main body, the position of the corresponding described spool collar of described axle sleeve stretches out and is provided with annular flange flange, described annular flange flange is fastened on the limited step of described valve body.
4. a kind of waterway controlling valve structure according to claim 1, it is characterized in that: described pressing diaphragm covers and is provided with a boss, the feed-water end of described pod apertures is communicated with described water pressure balance cavity, and the waterexit end of described pod apertures is arranged on described boss.
5. a kind of waterway controlling valve structure according to claim 1, is characterized in that: be provided with the self-cleaning pin preventing described water inlet duct from blocking in described water inlet duct, the top of described self-cleaning pin is fixed on described pressing diaphragm and covers.
6. a kind of waterway controlling valve structure according to claim 1, it is characterized in that: also comprise the solenoid valve seat that solenoid valve is arranged on described solenoid valve base, solenoid valve iron core and pressure release mouth is provided with in described solenoid valve, the bottom of described solenoid valve iron core is provided with the iron core caulking gum sealing described pressure release mouth, the top sealing with the upper surface of described diaphragm gland that described pressure release mouth is arranged on described diaphragm gland contacts, drainage channel is provided with in described pressure release mouth, one end of described drainage channel is communicated with the waterexit end of described pod apertures, the other end of described drainage channel is communicated with described relief hole, described solenoid valve seat is set in outside described diaphragm gland.
7. a kind of waterway controlling valve structure according to claim 6, is characterized in that: have gap between the sidewall of described solenoid valve seat and described diaphragm gland, and one end of described flowing hole is communicated with by the water outlet of this gap with described pressure relief water circulation road.
CN201520696146.4U 2015-09-09 2015-09-09 Waterway control valve structure Withdrawn - After Issue CN205036887U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520696146.4U CN205036887U (en) 2015-09-09 2015-09-09 Waterway control valve structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520696146.4U CN205036887U (en) 2015-09-09 2015-09-09 Waterway control valve structure

Publications (1)

Publication Number Publication Date
CN205036887U true CN205036887U (en) 2016-02-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520696146.4U Withdrawn - After Issue CN205036887U (en) 2015-09-09 2015-09-09 Waterway control valve structure

Country Status (1)

Country Link
CN (1) CN205036887U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042109A (en) * 2015-09-09 2015-11-11 鲍伟军 Waterway control valve structure
CN106838351A (en) * 2016-12-06 2017-06-13 中国航天建设集团有限公司 Self-operated type automatic fire control shower valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042109A (en) * 2015-09-09 2015-11-11 鲍伟军 Waterway control valve structure
CN106838351A (en) * 2016-12-06 2017-06-13 中国航天建设集团有限公司 Self-operated type automatic fire control shower valve

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AV01 Patent right actively abandoned
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Granted publication date: 20160217

Effective date of abandoning: 20170627