CN201487340U - Differential pressure power type liquid level automatic control valve - Google Patents
Differential pressure power type liquid level automatic control valve Download PDFInfo
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- CN201487340U CN201487340U CN2009201657335U CN200920165733U CN201487340U CN 201487340 U CN201487340 U CN 201487340U CN 2009201657335 U CN2009201657335 U CN 2009201657335U CN 200920165733 U CN200920165733 U CN 200920165733U CN 201487340 U CN201487340 U CN 201487340U
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Abstract
The utility model relates to a differential pressure power type liquid level automatic control valve, and the differential pressure power type principle is applied to the opening and closing of the valve, wherein pressure liquid acts on the right side of a piston through a liquid inlet pipe, at the same time, the pressure liquid enters a pressure cavity by going in a guide pipe liquid inlet through the guide pipe, and going in the liquid inlet of the pressure cavity, and when the pressure cavity is filled up with the pressure liquid, the pressure intensity of the left side of the piston is as same as that of the right side thereof. As the area of the left side of the piston is at least 3 times of that of the right side, a rather big differential pressure is formed between the left and right sides of the piston, and the piston moves from left to right and is empowered sufficiently to prop against the liquid inlet pipe, thereby achieving the air tightness effect. The differential pressure power type liquid level automatic control valve provided by the utility model effectively controls liquid incoming and outgoing, and is provided with functions of automatic opening and closing, thereby saving water or avoiding useful liquid from being waste, and the utility model is immune from safety hazard.
Description
Technical field
The utility model relates to fluid level control valve, a kind of specifically pressure difference-powered liquid level automatic control valve.
Background technique
In the live and work, inevitably relate to transportation, scheduling to liquid, such as, hot and cold water, seawater, beverage, diesel oil, gasoline and crude oil, edible oil, liquid detergent, industrial sulphuric acid, hydrochloric acid, nitric acid, industrial brine, buck, other industrial solvent or the like.Fluid level control valve generally uses in feed liquor control or fluid control, but existing fluid level control valve can not be realized automatic control, and using has promptly increased user cost, and there is potential safety hazard in wayward again, maintenance.
The model utility content
At the defective that exists in the prior art, the purpose of this utility model is to provide a kind of pressure difference-powered liquid level automatic control valve, adopt pressure difference-powered formula fluid mechanics principle, control feed liquor or fluid effectively, and possess automatic unlatching and automatic closing function, thereby reach using water wisely or the purpose of the useful liquid of putting and ending to waste, do not have potential safety hazard.
For reaching above purpose, the technological scheme that the utility model is taked is:
A kind of pressure difference-powered liquid level automatic control valve, the left end of the right-hand member of left valve barrel 41 and right valve barrel 44 links together by threaded joints A22 and constitutes the shell of feed liquor part, liquid-discharging tube 43 is connected with the lower surface of left valve barrel 41 by threaded joints B23, it is characterized in that: the inner chamber of left valve barrel 41 is a pressure chamber 7, the right part of left valve barrel 41 is provided with dividing plate 42, the both sides up and down of dividing plate 42 respectively are provided with a piston exhaust port 6 that connects dividing plate 42, the middle part of dividing plate 42 is the piston hole that is provided with first piston seal ring 8, the miner diameter end of the piston 5 of convex shape is located in the piston hole, bigger diameter end be located in left valve barrel 41 inner chambers and and the madial wall of left valve barrel 41 between be provided with second piston packing 9, between dividing plate 42 and piston 5 bigger diameter ends for there not being the chamber 45 of pressure; The inner chamber left end of right valve barrel 44 is an admission chamber 4, and admission chamber 4 presses chamber 45 to be communicated with by piston exhaust port 6 and nothing, direct and liquid-discharging tube 43 connections in admission chamber 4 bottoms; Liquid inlet pipe 2 is located in the inner chamber of right valve barrel 44, and the left end of liquid inlet pipe 2 is positioned at admission chamber 4, and right-hand member is connected with externally threaded feed liquor interface 1, and the left end of liquid inlet pipe 2 is over against the miner diameter end of piston 5; The lower wall of left valve barrel 41 is provided with the backguy perforation 14 of up/down perforation, stainless steel backguy 17 is installed in the backguy perforation 14, stainless steel backguy 17 is provided with and is used to seal the bore a hole ball sealer 15 of pressure chamber pressure relief opening 16 of 14 lower ends of backguy, be provided with the pistons stops 21 to 5 position-limiting actions of piston in the pressure chamber 7, pistons stops 21 is between stainless steel backguy 17 and piston 5; Conduit 3 is communicated with pressure chamber 7 and liquid inlet pipe 2, and conduit 3 is provided with pressure chamber liquid entering hole 10 in pressure chamber 7, and conduit 3 is provided with conduit liquid entering hole 11 in liquid inlet pipe 2, and conduit liquid entering hole 11 is provided with the conduit plug 13 of band Returnning spring 12; The upper end of stainless steel backguy 17 is passed conduit 3 backs and is connected with conduit plug 13, and the lower end is connected with stainless steel floating ball 20; The sidewall of liquid-discharging tube 43 is provided with liquid level regulator 18, and the end that the feed flow position is regulated with coiling 19 is connected with liquid level regulator 18, and the other end is connected with stainless steel backguy 17 on the stainless steel floating ball 20.
On the basis of technique scheme, threaded joints A22 is for falling screw thread, and threaded joints B23 is along screw thread.
On the basis of technique scheme, the area of piston 5 bigger diameter ends is 3 times of miner diameter end area at least.
On the basis of technique scheme, conduit 3 is arranged in the upper wall of left valve barrel 41 and right valve barrel 44 or in the front panel or in the rear sidewall, or is arranged on left valve barrel 41 and right valve barrel 44 outsides.
Pressure difference-powered liquid level automatic control valve described in the utility model, adopt pressure difference-powered formula fluid mechanics principle, control feed liquor or fluid effectively, and possess automatic unlatching and automatic closing function, thereby reach using water wisely or the purpose of the useful liquid of putting and ending to waste, do not have potential safety hazard.
Description of drawings
The utility model has following accompanying drawing:
The structural representation of Fig. 1 pressure difference-powered liquid level automatic control valve
The structural representation at A place among Fig. 2 Fig. 1
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As Fig. 1, shown in 2, pressure difference-powered liquid level automatic control valve described in the utility model, the left end of the right-hand member of left valve barrel 41 and right valve barrel 44 links together by threaded joints A22 and constitutes the shell of feed liquor part, liquid-discharging tube 43 is connected with the lower surface of left valve barrel 41 by threaded joints B23, the inner chamber of left valve barrel 41 is a pressure chamber 7, the right part of left valve barrel 41 is provided with dividing plate 42, the both sides up and down of dividing plate 42 respectively are provided with a piston exhaust port 6 that connects dividing plate 42, the middle part of dividing plate 42 is the piston hole that is provided with first piston seal ring 8, the miner diameter end of the piston 5 of convex shape is located in the piston hole, bigger diameter end be located in left valve barrel 41 inner chambers and and the madial wall of left valve barrel 41 between be provided with second piston packing 9, between dividing plate 42 and piston 5 bigger diameter ends for there not being the chamber 45 of pressure; The inner chamber left end of right valve barrel 44 is an admission chamber 4, and admission chamber 4 presses chamber 45 to be communicated with by piston exhaust port 6 and nothing, direct and liquid-discharging tube 43 connections in admission chamber 4 bottoms; Liquid inlet pipe 2 is located in the inner chamber of right valve barrel 44, and the left end of liquid inlet pipe 2 is positioned at admission chamber 4, and right-hand member is connected with externally threaded feed liquor interface 1, and the left end of liquid inlet pipe 2 is over against the miner diameter end of piston 5; The lower wall of left valve barrel 41 is provided with the backguy perforation 14 of up/down perforation, stainless steel backguy 17 is installed in the backguy perforation 14, stainless steel backguy 17 is provided with and is used to seal the bore a hole ball sealer 15 of pressure chamber pressure relief opening 16 of 14 lower ends of backguy, be provided with the pistons stops 21 to 5 position-limiting actions of piston in the pressure chamber 7, pistons stops 21 is between stainless steel backguy 17 and piston 5; Conduit 3 is communicated with pressure chamber 7 and liquid inlet pipe 2, and conduit 3 is provided with pressure chamber liquid entering hole 10 in pressure chamber 7, and conduit 3 is provided with conduit liquid entering hole 11 in liquid inlet pipe 2, and conduit liquid entering hole 11 is provided with the conduit plug 13 of band Returnning spring 12; The upper end of stainless steel backguy 17 is passed conduit 3 backs and is connected with conduit plug 13, and the lower end is connected with stainless steel floating ball 20; The sidewall of liquid-discharging tube 43 is provided with liquid level regulator 18, and the end that the feed flow position is regulated with coiling 19 is connected with liquid level regulator 18, and the other end is connected with stainless steel backguy 17 on the stainless steel floating ball 20.Stainless steel backguy 17 and feed flow position are regulated with coiling 19 because stainless steel floating ball 20 is ined succession respectively, so the weight of stainless steel floating ball 20 must guarantee that conduit plug 13 has enough strength to come occlusion catheter liquid entering hole 11 greater than the elastic force of 2 times Returnning spring 12.The gravity of stainless steel floating ball 20 should equal or be slightly larger than liquid to the buoyancy that it produced, and to guarantee that stainless steel floating ball 20 can be submerged in the liquid fully, guarantees that container has the high liquid level of trying one's best, the volume waste of avoiding container to produce because of containing discontented liquid.The diameter of backguy perforation 14 and the equal diameters of ball sealer 15 also equate with the caliber of conduit 3.Backguy perforation 14 is the passage of stainless steel backguy 17, is again the drainage runner of pressure chamber pressure relief opening 16.The diameter of stainless steel backguy 17 is then little many than the caliber of conduit 3, it passes conduit 3 until conduit liquid entering hole 11 by pressure chamber liquid entering hole 10, link to each other with conduit plug 13 again, the invention thinking of this uniqueness, make the structure of whole valve seem simple especially and be convenient to control and reduce greatly the valve cost on the one hand, on the other hand, the effect of mediation conduit 3 is also played in stainless steel backguy 17, avoids conduit 3 to be stopped up by the impurity in the liquid.Liquid level regulator 18 among Fig. 1 is arranged on the upper left side of discharge opeing part, the end that the feed flow position is regulated with coiling 19 is fixed on the liquid level regulator 18, liquid level can be regulated and set to the other end by the stainless steel floating ball 20 stainless steel backguy 17 of ining succession by it, can satisfy various demand.
On the basis of technique scheme, threaded joints A22 is for falling screw thread, and threaded joints B23 is along screw thread.Top of the present utility model is the feed liquor part, by about two valve bodies be formed by connecting by the A22 of falling the threaded joints, when the utility model was connected by being provided with externally threaded feed liquor interface 1 with extraneous feed flow source, the thread forms of falling can make the joint stubborn more tight more, avoided leakage accident to take place.Bottom of the present utility model is the discharge opeing part, and the upper and lower is by forming along being threaded.This Placement is convenient to maintenance, also is convenient to the replacing of stainless steel floating ball 20 in case of necessity.
On the basis of technique scheme, the area of piston 5 bigger diameter ends is 3 times of miner diameter end area at least.
On the basis of technique scheme, conduit 3 is arranged in the upper wall of left valve barrel 41 and right valve barrel 44 or in the front panel or in the rear sidewall, or is arranged on left valve barrel 41 and right valve barrel 44 outsides.Be that the position of conduit 3 is not limited to up on the tube wall (upper wall), also can below tube wall on or other position or take external form.
Pressure difference-powered formula principle is adopted in the opening and closing of pressure difference-powered liquid level automatic control valve described in the utility model, supposes that liquid-discharging tube 43 is communicated with container,
(1) when container needs feed liquor, promptly when stainless steel floating ball 20 is higher than liquid level, stainless steel backguy 17 is under the action of gravity of stainless steel floating ball 20, move up after making conduit plug 13 overcome the elastic force of Returnning spring 12, and complete sealing duct liquid entering hole 11, stainless steel backguy simultaneously 17 drives ball sealer 15 and moves down and leave fully backguy perforation 14, makes pressure chamber pressure relief opening 16 be in the complete opening state.At this moment, pressured fluid is acted on the right side of piston 5 by liquid inlet pipe 2, and the left side of piston 5 is in passive state, so the both sides at piston 5 form a bigger pressure reduction, piston 5 moves under the effect of this pressure reduction from right to left, valve is in the complete opening state, liquid inlet pipe 2 and admission chamber 4 are communicated with, pressured fluid flows into liquid-discharging tube 43 by admission chamber 4, when piston 5 is mobile from right to left, liquid in the pressure chamber 7 flows into liquid-discharging tube 43 from pressure chamber pressure relief opening 16, thereby make pressured fluid finally enter in the container, said container can be a flush toilet, stainless steel water tank, electric water heater, solar water heater, the pond, water tower, oil tank, the beverage vessel, industrial liquid groove or the like.
(2) when the liquid level in the container reaches default definite value, promptly be positioned at liquid level following time when stainless steel floating ball 20, stainless steel floating ball 20 under buoyancy function, lost (or major part has lost) it to the pulling force of stainless steel backguy 17, at this moment, under the elastic force effect of Returnning spring 12, conduit plug 13 leaves conduit liquid entering hole 11, pass through liquid inlet pipe 2 when admission chamber 4 flows into liquid-discharging tubes 43 at pressured fluid, pressured fluid also by conduit liquid entering hole 11 via conduit 3, enter in the pressure chamber 7 by pressure chamber liquid entering hole 10 again.When conduit plug 13 leaves conduit liquid entering hole 11, drive in the stainless steel backguy 17 and draw, ball sealer 15 is risen in the backguy perforation 14, utilize the elastic force of Returnning spring 12 to keep the sealing of 15 pairs of backguys perforation 14 of ball sealer, make pressure chamber pressure relief opening 16 be in complete sealing state, the pressured fluid of coming from conduit 3 is constantly entered in the pressure chamber 7 by pressure chamber liquid entering hole 10, pressure in the pressure chamber 7 raise gradually and reach the pressure of liquid inlet pipe 2, and the pressure in piston 5 left sides also reaches the pressure on right side.According to designing requirement of the present utility model, piston 5 left side areas are 3 times of right side area at least, so the left and right sides at piston 5 forms a bigger pressure reduction, piston 5 moves from left to right, simultaneously also make piston 5 have enough strength to withstand liquid inlet pipe 2, when the miner diameter end of piston 5 sealed up the left end of liquid inlet pipe 2 fully, pressured fluid stopped to flow into admission chamber 4, valve is in buttoned-up status, and container stops feed liquor.Further, can have the long particular design of shift motion that " horn mouth " and the rightmost side of piston 5 have " horn mouth " and piston 5, make the sealing place very tight, really reach the effect of " watertight " by the outlet port of liquid inlet pipe 2.
Force analysis during pressure difference-powered liquid level automatic control valve opening and closing described in the utility model:
With minimum gauge DN15 is example (pressured fluid is a water)
(1) maximum weighted of ball sealer 15 is calculated
The bore of the caliber=conduit plug 13 of the diameter d 1=conduit 3 of the diameter d 1=backguy perforation 14 of the diameter d 1=ball sealer 15 of pressure chamber pressure relief opening 16, according to this patent designing requirement, d1=0.25mm, the bore d3=0.15mm of stainless steel backguy 17, suppose that high inlet hydraulic is that (liquid entering hole pressure can be so not high usually for 0.8Mpa, be generally 0.2～0.3Mpa), pressure maximum in the pressure chamber 7 also is 0.8Mpa, the stressed F1 (max) of ball sealer 15=effective lifting surface area S1 * 0.8Mpa=1/4 * ∏ * d1 * d1 * 0.8MPa=3.925g (ball sealer 15 effective lifting surface areas can be considered the area of a circle that diameter is d1).
(2) weight and volume of stainless steel floating ball 20 is set
(radius R=18mm), thickness is 1mm to the diameter D=36mm of stainless steel floating ball 20, and proportion is 7.9g/cm
3,
Then, volume V=4/3 * ∏ * R
3=4/3 * 3.14 * 1.8
3=24.42cm
3
Then, the proportion=24.42g of buoyancy F=V * water
And, weight G=4/3 * ∏ * 0.1
3* proportion=4/3 * 3.14 * 0.1
3* 7.9g/cm
3=33g.
Because the weight of stainless steel floating ball 20 greater than its buoyancy in water, so stainless steel floating ball 20 can drown fully, guarantees that container has the high liquid level of trying one's best, the volume waste of avoiding container to produce because of containing discontented liquid.
(3) parameter of Returnning spring 12 is set
The spring thread diameter of reset spring 12 is 0.168mm, the centre distance of spring is D2=2.22mm, the employing spring steel is a spring material, the antifatigue coefficient is high, deformation coefficient is 78000MPa, and the displacement distance of conduit plug 13 is h=1.386mm, and just the compression distance of Returnning spring 12 is h=1.386mm, the number of coils is 8, then elastic force T1=h * 8 * 0.168 of each root Returnning spring 12
4* 78000/2.22
3* 8=8g, total elastic force T=16g of two Returnning springs 12 so.
The power that need overcome when (4) resetting
When the complete sealing duct liquid entering hole 11 of conduit plug 13, the stressed of conduit plug 13 is respectively
A. the residual gravity of stainless steel floating ball 20 (33g-24.42g)/2=4.29g
B. the pressure reduction of conduit plug 13=plug area * 0.8MPa=1/4 * ∏ * d1 * d1 * 0.8MPa=3.925g.
The power that need overcome when so Returnning spring 13 resets be 4.29g+3.925g=8.215g＜
Total elastic force T=16g of two Returnning springs 12 is so the distance that this moment, conduit plug 13 left conduit liquid entering hole 16 is: 0.67mm, pressured fluid can enter conduit 3 from conduit liquid entering hole 16 effectively fully and enter in the pressure chamber 7 again.
(5) Returnning spring 12 is kept ball sealer 15 required power in backguy perforation 14
A. the stressed 3.925g of ball sealer 15
B. the residual gravity of stainless steel floating ball 20 (33g-24.42g)/2=4.29g
So Returnning spring 12 is kept ball sealer 15 required power in backguy perforation 14: total elastic force T=16g of 3.925+4.29=8.215g＜two Returnning spring 12.
So can resting on fully, ball sealer 15 can seal backguy perforation 14 in the backguy perforation 14 simultaneously, can keeping pressure in the pressure chamber 7, constant substantially (if because poorly sealed between ball sealer 15 and the backguy perforation 14 and little by little seepage that cause do not influence the interior pressure of pressure chamber 7 yet, the flow of this seepage is far smaller than the feed liquor flow of pressure chamber liquid entering hole 10 after all.)
(6) elastic force of the pulling force of stainless steel backguy 17 and Returnning spring 12 relation
When liquid level in the container reduced, behind stainless steel floating ball 20 loss of buoyance, the stressed of it was respectively
A. the own wt G=33g of stainless steel floating ball 20.
B. the stainless steel backguy is to the pulling force P of stainless steel floating ball 20
C. the pulling force P ' with 19 pairs of stainless steel floating balls 20 of coiling is regulated in the feed flow position
In fact, P=P ', then, 2P=G, P=16.5g
Total elastic force T=16g of P=16.5g＞two Returnning spring 12 so stainless steel floating ball 20 can overcome the elastic force of Returnning spring 12 fully, makes stainless steel backguy 17 have enough strength to allow conduit plug 13 seal up conduit liquid entering hole 16 fully.
3, the effect of liquid level regulator 18
The advantage of pressure difference-powered liquid level automatic control valve described in the utility model is as follows:
(1) the utility model structure is extremely simple, novel in design, principle is clear. Only have a movable part---piston in the utility model, need not maintenance, need not to change, service life is extremely long.
(2) the utility model is different from traditional ball-cock assembly, and it has overcome all shortcomings of traditional ball-cock assembly, and especially it has avoided traditional ball-cock assembly to adopt the shortcoming of rubber seal and the shortcoming that ruptures easily in the balance pivot place.
(3) the utility model can be regulated liquid level by liquid level regulator 18, allows liquid level satisfy the demand of different times.
(4) the utility model volume is little, in light weight, and cost of transportation is low.
(3) in order to prolong service life of the present utility model, that the utility model can adopt is nontoxic, mechanical performance is near the material of stainless ultra high molecular polyethylene (UHMW-PE) as valve, have low temperature resistant, corrosion-resistant, anti-cracking resistance, ageing-resistant characteristics, service life was up to 50 years.
(4) the utility model adopts injection mo(u)lding, need not turner, and output height, cost are low.
(5) the utility model is easy to install, and general kinsfolk all can install, and need not the qualified installation person.
Claims (4)
1. pressure difference-powered liquid level automatic control valve, the left end of the right-hand member of left valve barrel (41) and right valve barrel (44) links together by threaded joints A (22) and constitutes the shell of feed liquor part, liquid-discharging tube (43) is connected with the lower surface of left valve barrel (41) by threaded joints B (23), it is characterized in that:
The inner chamber of left valve barrel (41) is pressure chamber (7), the right part of left valve barrel (41) is provided with dividing plate (42), the both sides up and down of dividing plate (42) respectively are provided with a piston exhaust port (6) that connects dividing plate (42), the middle part of dividing plate (42) is for being provided with the piston hole of first piston seal ring (8), the miner diameter end of the piston of convex shape (5) is located in the piston hole, bigger diameter end be located in left valve barrel (41) inner chamber and and the madial wall of left valve barrel (41) between be provided with second piston packing (9), between dividing plate (42) and piston (5) bigger diameter end for there not being the chamber (45) of pressure;
The inner chamber left end of right valve barrel (44) is admission chamber (4), and admission chamber (4) presses chamber (45) to be communicated with by piston exhaust port (6) and nothing, direct and liquid-discharging tube (43) connection in admission chamber (4) bottom;
Liquid inlet pipe (2) is located in the inner chamber of right valve barrel (44), and the left end of liquid inlet pipe (2) is positioned at admission chamber (4), and right-hand member is connected with externally threaded feed liquor interface (1), and the left end of liquid inlet pipe (2) is over against the miner diameter end of piston (5);
The lower wall of left valve barrel (41) is provided with the backguy perforation (14) of up/down perforation, stainless steel backguy (17) is installed in the backguy perforation (14), stainless steel backguy (17) is provided with the ball sealer (15) of the pressure chamber pressure relief opening (16) that is used to seal backguy perforation (14) lower end, be provided with the pistons stops (21) that piston (5) is played position-limiting action in the pressure chamber (7), pistons stops (21) is positioned between stainless steel backguy (17) and the piston (5);
Conduit (3) is communicated with pressure chamber (7) and liquid inlet pipe (2), conduit (3) is provided with pressure chamber liquid entering hole (10) in pressure chamber (7), conduit (3) is provided with conduit liquid entering hole (11) in liquid inlet pipe (2), conduit liquid entering hole (11) is provided with the conduit plug (13) of band Returnning spring (12);
The upper end of stainless steel backguy (17) is passed conduit (3) back and is connected with conduit plug (13), and the lower end is connected with stainless steel floating ball (20);
The sidewall of liquid-discharging tube (43) is provided with liquid level regulator (18), and the end that the feed flow position is regulated with coiling (19) is connected with liquid level regulator (18), and the other end is connected with stainless steel backguy (17) on the stainless steel floating ball (20).
2. pressure difference-powered liquid level automatic control valve as claimed in claim 1 is characterized in that: threaded joints A (22) is for falling screw thread, and threaded joints B (23) is along screw thread.
3. pressure difference-powered liquid level automatic control valve as claimed in claim 1 is characterized in that: the area of piston (5) bigger diameter end is 3 times of miner diameter end area at least.
4. pressure difference-powered liquid level automatic control valve as claimed in claim 1, it is characterized in that: conduit (3) is arranged in the upper wall of left valve barrel (41) and right valve barrel (44) or in the front panel or in the rear sidewall, or is arranged on left valve barrel (41) and right valve barrel (44) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201657335U CN201487340U (en) | 2009-07-17 | 2009-07-17 | Differential pressure power type liquid level automatic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201657335U CN201487340U (en) | 2009-07-17 | 2009-07-17 | Differential pressure power type liquid level automatic control valve |
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| Publication Number | Publication Date |
|---|---|
| CN201487340U true CN201487340U (en) | 2010-05-26 |
Family
ID=42426219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201657335U Expired - Lifetime CN201487340U (en) | 2009-07-17 | 2009-07-17 | Differential pressure power type liquid level automatic control valve |
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| CN (1) | CN201487340U (en) |
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| CN108225919A (en) * | 2017-11-01 | 2018-06-29 | 广州恒科技有限公司 | A kind of metal, rod-shaped gas type cupping machine |
| CN108225922A (en) * | 2017-11-01 | 2018-06-29 | 韦华新 | A kind of convenient rubber material device |
| CN107817159A (en) * | 2017-11-01 | 2018-03-20 | 韦华新 | A kind of elastomeric material device |
| CN108128573A (en) * | 2017-12-19 | 2018-06-08 | 重庆厚全科技发展有限公司 | A kind of waste collection disk |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20100526 Effective date of abandoning: 20090717 |