CN104329485A - Multifunctional combination valve - Google Patents
Multifunctional combination valve Download PDFInfo
- Publication number
- CN104329485A CN104329485A CN201410495505.XA CN201410495505A CN104329485A CN 104329485 A CN104329485 A CN 104329485A CN 201410495505 A CN201410495505 A CN 201410495505A CN 104329485 A CN104329485 A CN 104329485A
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- China
- Prior art keywords
- valve
- hole
- valve rod
- cylinder
- safety check
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Abstract
The invention discloses a multifunctional combination valve. The multifunctional combination valve has the following characteristics: a valve body is a four-way valve body, a water inlet and a water outlet are located on the same horizontal axial line, an upper through hole and a lower through hole are located on the same vertical axial line, a partition is arranged between the water inlet and the water outlet, a communicating hole is arranged between the water outlet and the upper through hole, a transverse partition is arranged between the upper through hole and the lower through hole, the center of the transverse partition is provided with a water hole, the upper part of the water hole is a conical hole, a valve seat serves as a check valve, the upper part of the upper through hole is a cylinder, a valve sleeve is arranged in the cylinder, an upper bonnet tightly presses the valve sleeve on the upper end surface of the cylinder, the center of the valve sleeve is provided with a stepped through hole, a valve rod is arranged in the stepped through hole, the center of the valve rod is provided with an axial through hole, the upper opening of which can be blocked, and the shaft rod of the lower end of the valve rod is slidably fitted in the bore of a check valve clack. The invention solves the technical shortage of a single valve, and develops the multifunctional combination valve which is integrated with filtration, the check valve, a stop valve, a flow valve and overpressure prevention, not only is a mounting space reduced greatly, but also investment is reduced, and moreover, the multifunctional combination valve is convenient to maintain.
Description
Technical field
The present invention relates to a kind of valve, particularly relate to a kind of Multifunctional combined valve.
Background technique
Usually lead on the lateral of user at water supply line, except water meter is installed, filter screen, Flow valve, stop valve, safety check (as backflow preventer), superpressure preventing (water hammer) device etc. are also installed as required.Because valve kind is more, and prior art generally adopts single valve, if adopt each independently valve connection, so requires larger space, brings larger workload again to installation and maintenance, and add investment.
Summary of the invention
The present invention mainly solves the deficiency existing for prior art, thus develops a kind of combination type break valve gathered multi-function in integral whole.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of combination type break valve, has valve body, bonnet, bottom flange, check valve receptacle, flap, valve pocket, valve rod, it is characterized in that:
Described valve body is a four-way valve body, and water inlet and osculum are positioned on same level axis, and upper through hole and lower through-hole are positioned on same vertical axis, two intersect vertical axis, and in the same plane;
Be provided with partition wall between described water inlet and osculum, have intercommunicating pore between described osculum and upper through hole, described intercommunicating pore is arc and tilts; Be provided with across bulkhead between described upper through hole and lower through-hole, described across bulkhead central authorities are provided with water port, and the top of described water port is taper hole, as the valve seat of safety check;
The top of described upper through hole is a cylinder barrel, is provided with valve pocket in described cylinder barrel, and valve pocket is pressed on the upper-end surface of cylinder barrel by bonnet; There is a ladder hole at described valve pocket center, is provided with valve rod in described ladder hole, described valve rod center be provided with suitable for reading can the axial hole of shutoff, the axostylus axostyle of valve rod lower end and the endoporus of safety check flap is sliding joins;
Filter screen is provided with, the cylindrical closure of described filter screen in cavity between described across bulkhead and bottom flange.
Technological scheme of the present invention can also be perfect further:
As preferably, the middle epimere of described valve rod is provided with outside thread, and stage casing is cylindrical, and lower section upper portion is provided with outside thread; The cylindrical in described valve rod stage casing and the large footpath of valve pocket ladder hole are slided and are joined, the outside thread of hypomere and the internal thread of ladder hole path screw, the root of valve rod lower end axostylus axostyle is provided with back-up ring one, in order to limit the position that valve rod moves upward, the outside thread of middle epimere and the internal thread of locking nut screw, and in order to the position of locking valve rod after adjustment flow, upper end is provided with handwheel, when rotating handwheel, valve rod can move up and down simultaneously.
As preferably, the top of described valve rod axial hole is reaming, is provided with ball and spring two in described reaming, and ball is pressed on the upper end of axial hole by bolt and packing ring, and above ball, appropriate location is drilled with two radial holes, communicates with reaming and the external world.In normal water supply situation; medium can not leak from radial hole; when (such as water hammer) snout cavity A hydraulic pressure significantly raises suddenly for a certain reason; when the hydraulic pressure top power acted on ball exceedes the pressure of spring two pairs of balls; ball is by jack-up; high pressure water is outwards released by valve rod axial hole, radial hole, and the continuation avoiding hydraulic pressure raises, and protection valve and upstream device are from damage.
As preferably, described safety check flap is inverted T-shaped, and lower end is an inversed taper platform, and tapering is consistent with the tapering of taper hole above water port, and male cone (strobilus masculinus) is provided with O-ring seals two; Be provided with two radial holes at the root of the less external diameter cylinder of flap, between the upper-end surface and valve pocket lower end surface of flap larger diameter cylinder, be provided with spring one.
As preferably, described bottom flange is similar to one flangedly has end thin-walled short cylinder, and with the internal thread spiro of valve body lower through-hole hypomere, O-ring seals one leaks in order to prevent medium; The cylinder end, has one for locating the boss of filter screen, has gap between described filter screen and bottom flange inwall, and in order to accumulate the impurity being filtered net filtration and getting off, the flange edge of bottom flange is provided with a radial screw, links, in order to discharge impurities with ball valve.
As preferably, the upstream extremity of water inlet is provided with internal thread, screws with the outside thread of intake pipe, and the downstream of osculum is provided with outside thread, screws with the internal thread of outlet conduit or other valve.
The invention has the beneficial effects as follows:
The invention solves the deficiency on single valve gate technology, develop a kind of combination brake switch and proporting with several functions filtration, safety check, stop valve, Flow valve and superpressure preventing are combined into one, both considerably reduce installing space, in turn save investment, and easy to maintenance.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is the present invention and constant pressure pressure-reducing valve linkage structure schematic diagram;
Accompanying drawing 3 is that the present invention and Anti-freezing valve link and connect structural representation;
Accompanying drawing 4 is the present invention and water hammer-resistant device linkage structure schematic diagram.
Description of reference numerals: 1, bottom flange, 2, O-ring seals one, 3, filter screen, 4, valve body, 5, O-ring seals two, 6, safety check flap, 7, spring one, 8, back-up ring one, 9, valve pocket, 10, O-ring seals three, 11, O-ring seals four, 12, bonnet, 13, valve rod, 14, ball, 15, spring two, 16, handwheel, 17, packing ring, 18, bolt, 21, locking nut, 26, valve seat cover, 27, guiding valve, 29, spring three, 34, valve casing two, 35, elastomer, 40, valve shaft, 41, sealing gasket, 42, spring four, 44, piston, 45 back-up rings two,
A, water inlet, B, osculum, H
1, upper through hole,
,h
2, lower through-hole,
,h
0, cavity, G, water port, P
1, inlet pressure, P
2, outlet pressure, S, pressure-sensitive face, V, ball valve, V
1, valve port one, V
2, valve port two, V
3, valve port three, W
1, partition wall, W
2, across bulkhead;
A, intercommunicating pore one, b axial hole, c, radial hole one, d, radial hole two, e, radial screw, f, gap, g, weep hole, h exhaust port, n, intercommunicating pore two, m, intercommunicating pore three.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment:
Multifunctional combined valve as shown in Figure 1, major function has filtration, safety check, stop valve, Flow valve and superpressure preventing.Be made up of parts such as bottom flange 1, O-ring seals 1, filter screen 3, valve body 4, O-ring seals 25, safety check flap 6, spring 1, back-up ring 8, valve pocket 9, O-ring seals 3 10, bonnet 12, valve rod 13, ball 14, spring 2 15, handwheels 16.
Valve body 4 is four-way valve bodies, and water inlet A and osculum B is positioned on same level axis, upper through hole H
1with lower through-hole H
2be positioned on same vertical axis, two intersect vertical axis, and in the same plane.The outside thread that the upstream extremity of water inlet A is provided with internal thread and intake pipe screws, and the downstream of osculum B is provided with outside thread, and screw with the internal thread of outlet conduit or other valve, holes does not directly communicate, and centre has partition wall W1 to be separated by; Upper through hole H
1with lower through-hole H
2between be provided with across bulkhead W
2, across bulkhead W
2central authorities are provided with water port G, and the top of water port G is taper hole, as the valve seat of safety check.
Upper through hole H
1top be a cylinder barrel, join with the outer round and smooth of valve pocket 9, and prevent medium from leaking by O-ring seals 3 10; The outside thread of cylinder barrel cylindrical and the internal thread of bonnet 12 screw, and are pressed on the upper-end surface of cylinder barrel by valve pocket 9.
In the center hole of valve pocket 9, be provided with valve rod 13, valve pocket 9 has a stepped shaft endoporus, and the larger endoporus in top is joined to the corresponding outer round and smooth of valve rod 13 stage casing, and prevents medium from leaking by O-ring seals 4 11; Bottom is internal thread, and screw with the outside thread of hypomere in valve rod 13, valve rod 13 upper end is provided with handwheel 16, and when rotating handwheel 16, valve rod 13 can move up and down simultaneously; In valve rod 13, the outside thread of epimere and the internal thread of locking nut 21 screw, in order to the position of locking valve rod 13 after adjustment flow; The root of valve rod 13 lower end axostylus axostyle is provided with back-up ring 1, is pressed on the taper hole above the G of water port by 0 shape seal ring 25 in order to limit when position that valve rod 13 moves upward and stop valve are closed.
The center of valve rod 13 is provided with axial hole b, ball 14 and spring 2 15 is provided with in reaming above axial hole b, and by bolt 18 and packing ring 17, water route is blocked by the upper end that ball 14 is pressed on hole b, above ball 14, appropriate location is drilled with two radial hole one c, communicates with reaming.In normal water supply situation; medium can not leak from c hole; when snout cavity A hydraulic pressure significantly raises suddenly for a certain reason; when the hydraulic pressure top power acted on ball 14 exceedes the pressure of spring 2 15 pairs of balls 14; ball 14 is by jack-up; high pressure water passing hole b, hole c outwards release, and the continuation avoiding hydraulic pressure raises, and protection valve and upstream device are from damage.
The axostylus axostyle of valve rod 13 lower end and the endoporus of safety check flap 6 are slided and are joined, and the length of axostylus axostyle is slightly shorter than the degree of depth of endoporus; Safety check flap 6 is in inverted T-shaped, and lower end is an inversed taper platform, and tapering is consistent with the tapering of taper hole above the G of water port, and male cone (strobilus masculinus) is provided with O-ring seals 25; Be provided with two radial hole two d at the root of the less external diameter cylinder of flap 6, when preventing flap 6 from moving, produce gas-tight phenomenon.Spring 1 is provided with between the upper-end surface of flap 6 larger diameter cylinder and the lower end surface of valve pocket 9, certain pretightening force is had after installation, therefore when not water flowing, O-ring seals 25 on flap 6 male cone (strobilus masculinus) all the time with water port G above taper-face contact, pretightening force is unsuitable excessive, otherwise during medium circulation, flow resistance loss is comparatively large, is advisable to open hydraulic pressure 0.01MP. upper through hole H
1and between osculum B, by an arc and tilt intercommunicating pore a be communicated with.
Bottom flange 1 is similar to one flangedly has end thin-walled short cylinder, with valve body lower through-hole H
2the internal thread spiro of hypomere, O-ring seals 1 leaks in order to prevent medium; Have a boss at the bottom of bottom flange 1, filter screen 3 is arranged on boss and across bulkhead W
2between the boss of below, have gap f between filter screen 3 and bottom flange 1 inwall, in order to accumulate the impurity being filtered net 3 and filtering down, the flange edge of bottom flange 1 is provided with a radial screw e and ball valve V and links.The axis of rear valve pocket 9, valve rod 13, flap 6 and filter screen 3 and upper and lower through hole H are installed
1, H
2axis consistent.
During adjust flux, first unclamp locking nut 21, then rotation hand wheel 16 to appropriate location, the position due to back-up ring 1 there occurs change (being flow maximum position in figure), therefore have adjusted flow; After adjustment meets the requirements, again locking nut is locked.
When stop valve uses, first locking nut 21 is upwards exited, then rotation hand wheel 16, until O-ring seals 25 is pressed on the conical surface above the G of water port.
When the impurity in filter screen 3 surface and groove f will be removed, as long as closed by this stop valve, and open ball valve V; After impurity is rinsed well by high pressure, high-velocity flow, ball valve V is closed, and by Flow-rate adjustment to correct position.
Work as P
1≤ 0 or P
1< P
2time, safety check flap 6 rapidly by closure of check ring, prevents the sewage pollution upstream cleaning water source in downstream under the pressure of spring 1.
This combination brake switch and proporting can also link up with the valve with other function, the more combination brake switch and proporting of composition function.
Fig. 2 links with constant pressure pressure-reducing valve:
Constant pressure pressure-reducing valve is when dispatching from the factory, according to user, delivery pressure requires that adjusted is good, if in use require change without the need to delivery pressure, as long as it is just passable to change spring 3 29, its working principle is: medium is through valve port two V
2after, pressure is by P
1be down to P
2, and to act on the S of pressure-sensitive face, overcome the pressure of spring 3 29, promote guiding valve 27 upstream direction and move, until with the pressure balance of spring 3 29, like this, reduction valve there has been a certain size Output pressure.As inlet pressure P
1when increase or flow reduce, outlet pressure P
2also increase, destroy the equilibrium of forces originally acted on guiding valve 27, guiding valve 27 is at P
2effect under, overcome the pressure of spring 3 29, upstream direction moves, and is turned down by valve port, like this, through valve port V
2velocity of medium increase, expenditure and pressure, P
2namely decrease, until recover former setting value; Otherwise, as inlet pressure P
1when reduction or flow increase, valve port two V
2aperture increase, throttling action reduce, make P
2return to former setting value, this ensures that there a more stable Output pressure.Exhaust port h makes cavity H
0communicate with air, when preventing guiding valve 27 from moving, produce gas-tight phenomenon.
Fig. 3 links with Anti-freezing valve
Anti-freezing valve working principle is: during normal water supply, the hydraulic pressure of outlet plenum acts on the upper-end surface of piston 44 by intercommunicating pore two n, because hydraulic pressure is higher, overcome the pressure of spring 4 42, promote piston 44 and valve shaft 40, sealing gasket 41 moves downward, until by drain valve valve port three V
3close; When stopping supplying water, the hydraulic pressure of outlet plenum B is the hydraulic pressure of residuary waters in outlet conduit, and generally very low, piston 44 moves upward under the effect of spring 4 42, till its upper-end surface contacts with the lower end surface of back-up ring 2 45, and drain valve valve port three V
3open, the residuary waters in outlet conduit is through intercommunicating pore two n, intercommunicating pore three m, valve port three V
3, discharge from weep hole g, because drain valve level is arranged on the minimum point of outlet conduit, therefore the residuary waters in outlet conduit can drain, like this, at severe cold season, especially severe cold area, reliably can ensure that outlet water pipe or valve do not break because ponding is freezing.
Fig. 4 links with water hammer-resistant device
The working principle of water hammer-resistant device: device is made up of valve casing 2 34 and elastomer 35, the intracavity diameter of valve casing 2 34 present broad in the middle, two is little, the internal thread at two links with the outside thread of Main valve outlet chamber B and outlet pipe respectively, be provided with elastomer 35 in the groove of intermediate cavity, the foam material that elastomer 35 has favorable elasticity by silicone rubber etc. is made.When downstream produces water hammer, shock wave is before propagating into main valve, and due to the compressive deformation of elastomer 35, cavity volume volume increases and absorbed, thus prevents upstream equipment from destruction.
Claims (6)
1. a Multifunctional combined valve, has valve body, bonnet, bottom flange, check valve receptacle, safety check flap, valve pocket, valve rod, it is characterized in that:
Described valve body (4) is a four-way valve body, and water inlet (A) and osculum (B) are positioned on same level axis, upper through hole (H
1) and lower through-hole (H
2) be positioned on same vertical axis, two intersect vertical axis, and in the same plane;
Partition wall (W is provided with between described water inlet (A) and osculum (B)
1), described osculum (B) and upper through hole H
1between have intercommunicating pore (a); Described upper through hole (H
1) and lower through-hole (H
2) between be provided with across bulkhead (W
2), described across bulkhead W
2central authorities are provided with water port (G), and the top of described water port (G) is taper hole, as the valve seat of safety check;
Described upper through hole (H
1) top be a cylinder barrel, be provided with valve pocket (9) in described cylinder barrel, valve pocket (9) is pressed on the upper-end surface of cylinder barrel by bonnet (12); There is a ladder hole at described valve pocket (9) center, is provided with valve rod (13) in described ladder hole, and described valve rod (13) center is provided with can the axial hole (b) of shutoff, the axostylus axostyle of valve rod lower end and the endoporus of safety check flap (6) is sliding joins;
Described across bulkhead (W
2) and bottom flange (1) between cavity in be provided with filter screen (3).
2. Multifunctional combined valve according to claim 1, is characterized in that: the middle epimere of described valve rod (13) is provided with outside thread, and stage casing is cylindrical, and lower section upper portion is provided with outside thread; The cylindrical in described valve rod (13) stage casing and the large footpath of valve pocket (9) ladder hole are slided and are joined, the outside thread of hypomere and the internal thread of ladder hole path screw, the root of valve rod (13) lower end axostylus axostyle is provided with back-up ring (8), in order to limit the position that valve rod (13) moves upward, the internal thread of the outside thread of middle epimere and locking nut (21) screws, in order to the position of locking valve rod (13) after adjustment flow, upper end is provided with handwheel (16).
3. Multifunctional combined valve according to claim 1 and 2, it is characterized in that: the top of described valve rod axial hole (b) is reaming, ball (14) and spring two (15) is provided with in described reaming, and by bolt (18) and packing ring (17), ball (14) is pressed on the upper end of axial hole (b), be drilled with two radial holes one (c) in appropriate location, ball (14) top and communicate with reaming and the external world.
4. Multifunctional combined valve according to claim 1 and 2, is characterized in that: described safety check flap (6) is in inverted T-shaped, and lower end is an inversed taper platform, and tapering is consistent with the tapering of water port (G) top taper hole, and male cone (strobilus masculinus) is provided with O-ring seals two (5); Be provided with two radial holes two (d) at the root of the less external diameter cylinder of safety check flap (6), between the upper-end surface of safety check flap (6) larger diameter cylinder and valve pocket (9) lower end surface, be provided with spring one (7).
5. Multifunctional combined valve according to claim 1 and 2, is characterized in that: described valve body bottom flange (1) likeness in form one is flanged (FLGD) has end thin-walled short cylinder, with lower through-hole (H
2) the internal thread spiro of hypomere, O-ring seals one (2) leaks in order to prevent medium; The cylinder end, has one for locating the boss of filter screen (3), gap (f) is had between described filter screen (3) and bottom flange (1) inwall, in order to accumulate the impurity being filtered net (3) and filtering down, the flange edge of bottom flange (1) is provided with a radial screw (e), link, in order to discharge impurities with ball valve (V).
6. Multifunctional combined valve according to claim 1 and 2, it is characterized in that: the upstream extremity of water inlet (A) is provided with internal thread, screw with the outside thread of intake pipe, the downstream of osculum (B) is provided with outside thread, screws with the internal thread of outlet conduit or other valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495505.XA CN104329485B (en) | 2014-09-24 | 2014-09-24 | A kind of Multifunctional combined valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495505.XA CN104329485B (en) | 2014-09-24 | 2014-09-24 | A kind of Multifunctional combined valve |
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| Publication Number | Publication Date |
|---|---|
| CN104329485A true CN104329485A (en) | 2015-02-04 |
| CN104329485B CN104329485B (en) | 2016-09-14 |
Family
ID=52404258
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|---|---|---|---|
| CN201410495505.XA Active CN104329485B (en) | 2014-09-24 | 2014-09-24 | A kind of Multifunctional combined valve |
Country Status (1)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286968A (en) * | 2015-06-10 | 2017-01-04 | 杜景东 | Extra-high tension unit, valving and valving control method |
| WO2017024792A1 (en) * | 2015-08-07 | 2017-02-16 | 恺霖卫浴科技（厦门）有限公司 | Dual volume flow rate switching device |
| CN106992306A (en) * | 2016-08-04 | 2017-07-28 | 上海瀚氢动力科技有限公司 | A kind of combination valve for fuel cell |
| CN107956886A (en) * | 2017-11-29 | 2018-04-24 | 株洲南方阀门股份有限公司 | A kind of fast inhale for carrying maintenance filtering delays row's formula air valve |
| CN108561561A (en) * | 2018-05-22 | 2018-09-21 | 刘广朋 | Anti- ponding self-sustaining valve |
| CN110388486A (en) * | 2019-04-30 | 2019-10-29 | 黑龙江北方阀业有限责任公司 | The compound valve group of antiscour |
| CN110671502A (en) * | 2019-09-03 | 2020-01-10 | 广州大学 | Water hammer resistant stop valve |
| CN110715059A (en) * | 2019-10-16 | 2020-01-21 | 杭州来晟利机电科技有限公司 | Filtering valve with stopping, non-return and filtering functions |
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| CN204164420U (en) * | 2014-09-24 | 2015-02-18 | 杭州春江阀门有限公司 | A kind of Multifunctional combined valve |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286968A (en) * | 2015-06-10 | 2017-01-04 | 杜景东 | Extra-high tension unit, valving and valving control method |
| CN106286968B (en) * | 2015-06-10 | 2019-12-20 | 杜景东 | Ultrahigh pressure equipment, valve device and valve device control method |
| WO2017024792A1 (en) * | 2015-08-07 | 2017-02-16 | 恺霖卫浴科技（厦门）有限公司 | Dual volume flow rate switching device |
| US10060540B2 (en) | 2015-08-07 | 2018-08-28 | Kylin Sanitary Technology (Xiamen) Co., Ltd. | Dual flow switching device |
| CN106992306B (en) * | 2016-08-04 | 2019-08-23 | 上海瀚氢动力科技有限公司 | A kind of combination valve for fuel cell |
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| CN108561561A (en) * | 2018-05-22 | 2018-09-21 | 刘广朋 | Anti- ponding self-sustaining valve |
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