CN101586690B - Self-hydraulic automatic regulation valve - Google Patents
Self-hydraulic automatic regulation valve Download PDFInfo
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- CN101586690B CN101586690B CN2009101000012A CN200910100001A CN101586690B CN 101586690 B CN101586690 B CN 101586690B CN 2009101000012 A CN2009101000012 A CN 2009101000012A CN 200910100001 A CN200910100001 A CN 200910100001A CN 101586690 B CN101586690 B CN 101586690B
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Abstract
This invention relates to a self-hydraulic automatic regulation valve, wherein upper end of a valve rod is set with a main hydraulic cylinder, and extends into main body of the main hydraulic cylinder to be fixedly connected with a piston; the piston divides the main body of the main hydraulic cylinder into an upper movable cavity and a lower movable cavity; left and right sides outside the valve body are respectively set with a charging hydraulic cylinder and a discharging hydraulic cylinder; lower end of the charging hydraulic cylinder is connected with one side of the charging flow channel, and upper end of the same is connected with liquid inlet of upper movable cavity in the main hydraulic cylinder; lower end of the discharging hydraulic cylinder is connected with one side of the discharging flow channel, and upper end of the same is connected with liquid inlet of the lower movable cavity in the main hydraulic cylinder. Accordingly, this invention regards the main hydraulic cylinder connected with charging flow channel and discharging flow channel at two ends of the valve body as the power source for pushing the piston therein to drive the valve rod to act, thereby realizing automatic switching-on, switching-off and regulation of regulation head.
Description
Technical field
The present invention relates to a kind of valve, in particular a kind of pressure of pipeline inner fluid medium that utilizes itself is realized self-hydraulic, the automatic regulating valve that valve opens and closes automatically.
Background technique
Existing modulating valve, as single-seat adjusting valve, sleeve adjusting valve etc. all must be in addition pneumatic or electronic etc. actuator, could realize the adjusting requirement of setting, more can't be under the high pressure condition safety and proper functioning.Look into Chinese patent database, wherein notice of authorization number is: CN2721992, name is called the utility model patent of " high-differential-pressure regulating valve ", disclose following content: " the utility model relates to a kind of high-differential-pressure regulating valve; structure comprises valve body; valve seat; valve rod; valve gap; throttling element, actuating device, Sealing and assembling set, throttling element is fixedly connected on the valve rod lower end, and be shaped on the sealing surface that cooperatively interacts with sealing surface of seat, mainly be that throttling element is composed in series by multi-level cone shape plunger, valve body is provided with the multistage sealing surface of seat that cooperatively interacts with multi-level cone shape plunger seal face, constitute the multistage throttle device, it is big to have regulation range, advantages such as outlet pressure medium and stability of flow are applicable to gas, the controlling device of liquid medium flow and pressure.”。Though this modulating valve has proposed certain measure under condition of high voltage, but still must have actuating device, can't realize automatic adjusting, and final in actual conditions, the use for a long time.
Summary of the invention
Deficiency in view of the background technique existence, the object of the present invention is to provide a kind of pressure of pipeline inner fluid medium that utilizes itself to drive the adjusting head, the realization valve opens and closes automatically, and can use for a long time in the High Pressure Difference flowing medium and more easy-operating self-hydraulic, automatic regulating valve.
For solving the problems of the technologies described above, the present invention realizes by the following technical solutions: a kind of self-hydraulic, automatic regulating valve, comprise valve body, regulate head, valve rod, valve seat, wherein offer height in the valve body, low two different runners, water inlet flow channel is arranged on lower, outlet passage is arranged on eminence, both are communicated with by intermediate flow channel, valve seat is arranged on the intermediate flow channel place, regulate head and constitute sealing pair with valve seat, all be provided with formation inclined-plane, inclined-plane and be sealed and matched regulating the fitting surface of head with valve seat, in the valve rod upper end one master hydraulic cylinder is set, the valve rod upper end portion is stretched in the cylinder body of master hydraulic cylinder and with piston and is fixedlyed connected, piston is divided into the cylinder body of master hydraulic cylinder, following two movable chambeies, the upper end portion of piston rod extends to the master hydraulic cylinder outside, on the cylinder body, following two movable chambeies offer liquid entering hole respectively, above master hydraulic cylinder, be provided with spring, spring housing is located on the upper end portion of piston rod, the spring lower end is pressed on the cylinder cap of master hydraulic cylinder, be provided with the unlatching spring in the movable chamber down, opening the spring upper end is pressed on the piston, opening the spring lower end is pressed on the inboard wall of cylinder block of master hydraulic cylinder, in the valve body external left, right both sides are respectively arranged with import, the outlet oil hydraulic cylinder, the lower end of imported hydraulic cylinder is communicated with water inlet flow channel one side, the upper end links to each other with the liquid entering hole in the last movable chamber of master hydraulic cylinder, the lower end of outlet oil hydraulic cylinder is communicated with outlet passage one side, the upper end links to each other with the liquid entering hole in the following movable chamber of master hydraulic cylinder, when outlet passage one side liquid pressure medium during to a setting value, the outlet oil hydraulic cylinder feed liquor of modulating valve and action, the master hydraulic cylinder inner carrier moves up, and regulates on the head and removes the primary importance that opens valve; When water inlet flow channel one side liquid pressure medium arrives a certain setting value, the imported hydraulic cylinder feed liquor of modulating valve and action, the master hydraulic cylinder inner carrier moves down, and regulates the second place that head moves down throttle down.
Safeguard that for convenience the present invention further is set to be respectively arranged with the import cut-off valve and export cut-off valve between imported hydraulic cylinder, outlet oil hydraulic cylinder and corresponding water inlet flow channel and outlet passage.When needs are safeguarded, cut off flowing medium by cut-off valve and enter, can carry out manual maintenance.
For the ease of regulating pressure and auxiliary valve tight seal, the spring that the present invention further is set to the top setting of master hydraulic cylinder is the pressure adjusting spring of adjustable pressure.
The present invention further is set to be provided with adjustment sleeve above master hydraulic cylinder, above-mentioned spring is arranged in the adjustment sleeve, be provided with spring seat between the cylinder cap of spring and master hydraulic cylinder, the spring upper end is pressed on the inwall of adjustment sleeve, and the spring lower end is pressed on the spring seat.
In order to increase the working life of regulating head and valve seat, the present invention further is set to regulate head and adopts the whole tungsten carbide structure, regulating head fixedlys connected with the valve rod formation by regulating a fastening piece, valve seat comprises the valve seat overcoat of concentric setting and the valve seat liner of whole tungsten carbide structure, and the valve seat liner is arranged on the inner ring of valve seat overcoat and with the valve seat overcoat and constitutes interference fit.
When regulating in order to close more easily, leicht fallen D/A, the present invention further is set to be arranged with the resonance cover on valve rod, the resonance cover is positioned at the valve seat top, put the horizontal mistake water flow passage of formation in resonance, crossing water flow passage is communicated with outlet passage, there is the gap and forms airtight cavity between the inwall of resonance cover and the outer wall of valve rod, valve rod inside is provided with the pressure compensation opening of perforation, pressure compensation opening one end is communicated with water inlet flow channel by the through hole of regulating on the fastening piece, and the pressure compensation opening the other end is communicated with cavity.When the flowing medium of water inlet flow channel one side flows in the cavity along pressure compensation opening, make the hydraulic pressure of regulating head top cavity identical with the hydraulic pressure of water inlet flow channel one side, changed a pressured state of regulating, can easily close the adjusting head.
The present invention further is set to regulate the middle attachment hole that offers axial setting of head, regulate a fastening piece and be arranged on an adjusting lower end, the attachment hole that the valve rod lower end is passed on the adjusting head is fixedlyed connected with an adjusting fastening piece formation, and the valve seat liner of described Tungsten carbite structure is fixed on the inner ring of valve seat overcoat by the mode of expanding with heat and contract with cold.
The present invention utilizes master hydraulic cylinder that the valve body both sides are communicated with the water-in and water-out runner as power source, and the piston that promotes in the master hydraulic cylinder drives the valve rod action, realize regulating head automatic unlatching, close and regulate.When outlet passage one side liquid pressure medium during to a setting value, the flowing medium of this side just promotes the piston action in the homonymy oil hydraulic cylinder, and hydraulic oil is entered in the following movable chamber of piston-type hydraulic cylinder, promotes to move on the piston, make valve rod drive the adjusting head and move up, finally open valve; When water inlet flow channel one side liquid pressure medium arrives a certain setting value, the flowing medium of this side just promotes the piston action in the homonymy oil hydraulic cylinder, and hydraulic oil is entered in the last movable chamber of piston-type hydraulic cylinder, promotes piston and moves down, make valve rod drive the adjusting head and move down, until closing fully.Regulating the setting of pressure can adjust by pressure adjusting spring, but pressure adjusting spring also auxiliary valve realize tight seal.Thereby utilize the pressure of pipeline inner fluid medium itself to drive the adjusting head with regard to having reached, realize the purpose that valve is opened automatically, closed and regulates.Adjusting head of the present invention adopts the whole tungsten carbide structure, and be fixed on the valve rod with the mechanical fasteners mode, part easy to wear adds the valve seat liner of whole tungsten carbide structure on the valve seat inner ring, and utilizes the method for expanding with heat and contract with cold that itself and the interference of valve seat overcoat formation are closely cooperated, and connects very firm; Water inlet flow channel and outlet passage are provided with pressure compensation opening by valve rod, have changed the pressured state of regulating head; Regulate head and can satisfy various different needs with different setting of Flow characteristics window.Thereby have that modulating valve of the present invention can anti-ly in the High Pressure Difference flowing medium for a long time wash away, cavitation erosion, antiscale and corrosion-resistant, by being implemented in operation under the High Pressure Difference flowing medium condition, long service life, safe and reliable to enforcement of the present invention.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation.
Fig. 2 is the A portion enlarged view of Fig. 1.
Embodiment
As shown in Figure 1, specific embodiments of the invention are a kind of self-hydraulic, automatic regulating valve, comprise valve body 1, regulate 2, regulate a fastening piece 5, master hydraulic cylinder 6, imported hydraulic cylinder 7, outlet oil hydraulic cylinder 8, valve rod 3, valve seat 4, wherein offer high and low two different runners in the valve body 1, water inlet flow channel 11 is arranged on lower, outlet passage 12 is arranged on eminence, and both are communicated with by intermediate flow channel.Valve seat 4 is arranged on the intermediate flow channel place, regulates 2 and establishes and valve seat 4 constitutes sealing pairs, all is provided with the inclined-plane with the fitting surface of valve seat 4 and constitutes the inclined-plane and be sealed and matched regulating 2.In valve rod 3 upper ends one master hydraulic cylinder 6 is set, valve rod 3 upper end portions are stretched in the cylinder body 64 of master hydraulic cylinder 6 and with piston 61 and are fixedlyed connected, piston 61 is divided into the cylinder body 64 of master hydraulic cylinder 6, following two movable chambeies (66,67), the upper end portion 621 of piston rod 62 extends to master hydraulic cylinder 6 outsides, on the cylinder body 64, following two movable chambeies (66,67) offer liquid entering hole 63 respectively, above master hydraulic cylinder 6, be provided with adjustment sleeve 9, adjustment sleeve 9 is fixedlyed connected with the cylinder cap 65 of master hydraulic cylinder 6 by bolt, pressure adjusting spring 91 is arranged in the adjustment sleeve 91 and is set on the upper end portion 621 of piston rod 62, between the cylinder cap 65 of pressure adjusting spring 91 and master hydraulic cylinder 6, be provided with spring seat 92, pressure adjusting spring 91 upper ends are pressed on the inwall of adjustment sleeve 9, and pressure adjusting spring 92 lower ends are pressed on the spring seat 92.In the following movable chamber 67 of master hydraulic cylinder 6, be provided with and open spring 68, opening spring 68 upper ends is pressed on the piston 61, opening spring 68 lower ends is pressed on cylinder body 64 inwalls of master hydraulic cylinder 6, in valve body 1 external left, right both sides are respectively arranged with import, outlet oil hydraulic cylinder (7,8), the lower end of imported hydraulic cylinder 7 is communicated with water inlet flow channel 11 1 sides, the upper end links to each other with the liquid entering hole 63 in the last movable chamber 66 of master hydraulic cylinder 6, the lower end of outlet oil hydraulic cylinder 8 is communicated with outlet passage 12 1 sides, the upper end links to each other with the liquid entering hole 63 in the following movable chamber 67 of master hydraulic cylinder 6, at imported hydraulic cylinder 7, be respectively arranged with import cut-off valve a1 and export cut-off valve a2 between outlet oil hydraulic cylinder 8 and corresponding water inlet flow channel 11 and the outlet passage 12.When outlet passage 12 1 side liquid pressure mediums during to a setting value, outlet oil hydraulic cylinder 8 feed liquors of modulating valve and action, master hydraulic cylinder 6 inner carriers 61 move up, and regulate on 2 and remove the primary importance that opens valve; When water inlet flow channel 11 1 side liquid pressure mediums when a certain setting value, imported hydraulic cylinder 7 feed liquors of modulating valve and action, master hydraulic cylinder 6 inner carriers 61 move down, and regulate 2 second places that move down throttle down.Wherein regulate 2 an employing whole tungsten carbide structure, regulate 2 a middle through hole 21 that offer axial setting, regulate a fastening piece 5 and be arranged on adjusting 2 lower end, regulate a fastening piece 5 and be shaped as hemisphere, regulate a fastening piece 5 corresponding adjustings on 2 one side end face and offer screw 51, valve rod 3 lower ends form outer double-screw bolt 31 and pass an attachment hole 21 of regulating on 2 and fixedly connected with an adjusting fastening piece 5 formations.Valve seat 4 comprises the valve seat overcoat 41 of concentric setting and the valve seat liner 42 of whole tungsten carbide structure, and valve seat liner 42 is fixed on valve seat overcoat 41 inner rings and with valve seat overcoat 41 by the method for expanding with heat and contract with cold and constitutes interference fit.Be arranged with resonance cover 10 on valve rod 3, resonance cover 10 is positioned at valve seat 4 tops, forms horizontal mistake water flow passage 101 on resonance cover 10, crosses water flow passage 101 1 ends and is communicated with outlet passage 12, and the other end is communicated with intermediate flow channel.There is the gap and forms airtight cavity 102 between the inwall of resonance cover 10 and the outer wall of valve rod 3, valve rod 3 inside are provided with the pressure compensation opening 32 of perforation, pressure compensation opening 32 is made up of for two sections vertical section that is provided with along the axis of valve rod 3 and horizontal segment, vertical section lower end of pressure compensation opening 32 is communicated with water inlet flow channel 7 by the through hole of regulating on the fastening piece 5 52, and horizontal segment one side of pressure compensation opening 32 is communicated with cavity 102.
In the above-described embodiments, suppose that the fluid medium pressure of water inlet flow channel 11 1 sides of valve body 1 is 30Pa, the pressure of outlet passage 12 1 sides is 0, then regulates on the head and moves valve wide open.The fluid medium pressure of supposing water inlet flow channel 11 1 sides of valve body 1 is 30Pa, and the pressure of outlet passage 12 1 sides is more than or equal to 0.6Pa, then regulates on the head and moves, and valve begins to open.
Safeguard for convenience in the foregoing description that the present invention further is set to be respectively arranged with import cut-off valve a1 and export cut-off valve a2 between imported hydraulic cylinder 7, outlet oil hydraulic cylinder 8 and corresponding water inlet flow channel 11 and outlet passage 12.When needs are safeguarded, cut off flowing medium by cut-off valve and enter, can carry out manual maintenance, be best mode of execution.If import cut-off valve a1 and outlet cut-off valve a2 are not set, just can't normally carry out manual maintenance.
In the foregoing description for the ease of regulating pressure and auxiliary valve tight seal, adopt the pressure adjusting spring 91 of adjustable pressure, have an effect with piston rod 62 by regulating pressure adjusting spring 91, it is best mode of execution, if this pressure adjusting spring 91 is not set, also be feasible, just can lose and regulate pressure and auxiliary valve tight seal effect.
Adopt mechanical connection manner to realize valve rod 3 in the foregoing description and regulate fixedlying connected between 2, more firm, if regulate front end wearing and tearing of 2, it is also convenient to change, and is the mode of execution of the best.Also can adopt other Placements to realize valve rod 3 and regulate fixedlying connected between 2.
The resonance that is arranged with on valve rod 3 in the foregoing description overlaps 10, resonance cover 10 is positioned at valve seat 4 tops, on resonance cover 10, form horizontal mistake water flow passage 101, crossing water flow passage 101 is communicated with outlet passage 12, there is the gap and forms airtight cavity 102 between the inwall of resonance cover 10 and the outer wall of valve rod 3, valve rod 3 inside are provided with the pressure compensation opening 32 of perforation, pressure compensation opening 32 is made up of for two sections vertical section that is provided with along the axis of valve rod 3 and horizontal segment, vertical section lower end of pressure compensation opening 32 is communicated with water inlet flow channel 7 by the through hole of regulating on the fastening piece 5 52, and horizontal segment one side of pressure compensation opening 32 is communicated with cavity 102.When the flowing medium of water inlet flow channel 11 1 sides flows in the cavitys 102 along pressure compensation opening 32, make the hydraulic pressure of regulating 2 a top cavity identical with the hydraulic pressure of water inlet flow channel 11 1 sides, changed and regulated a pressured state of 2, can easily close adjusting 2.
Adjusting in the foregoing description 3 and valve seat liner 42 all adopt the whole tungsten carbide structures, and very the fluid-resistant medium washes away; Valve seat 4 and regulate 3 the place of being sealed and matched and adopt cone match, sealing outlet passage window also adopts the inclined-plane setting, has changed the fluid action direction, makes it to have protected valve body 1 to greatest extent to valve body 1 generation souring.
Claims (10)
1. self-hydraulic, automatic regulating valve, comprise valve body, regulate head, valve rod, valve seat, wherein offer height in the valve body, low two different runners, water inlet flow channel is arranged on lower, outlet passage is arranged on eminence, both are communicated with by intermediate flow channel, valve seat is arranged on the intermediate flow channel place, regulate head and constitute sealing pair with valve seat, all be provided with formation inclined-plane, inclined-plane and be sealed and matched regulating the fitting surface of head with valve seat, it is characterized in that: one master hydraulic cylinder is set in the valve rod upper end, the valve rod upper end portion is stretched in the cylinder body of master hydraulic cylinder and with piston and is fixedlyed connected, piston is divided into the cylinder body of master hydraulic cylinder, following two movable chambeies, the upper end portion of piston rod extends to the master hydraulic cylinder outside, on the cylinder body, following two movable chambeies offer liquid entering hole respectively, above master hydraulic cylinder, be provided with spring, spring housing is located on the upper end portion of piston rod, the spring lower end is pressed on the cylinder cap of master hydraulic cylinder, be provided with the unlatching spring in the movable chamber down, opening the spring upper end is pressed on the piston, opening the spring lower end is pressed on the inboard wall of cylinder block of master hydraulic cylinder, in the valve body external left, right both sides are respectively arranged with import, the outlet oil hydraulic cylinder, the lower end of imported hydraulic cylinder is communicated with water inlet flow channel one side, the upper end links to each other with the liquid entering hole in the last movable chamber of master hydraulic cylinder, the lower end of outlet oil hydraulic cylinder is communicated with outlet passage one side, the upper end links to each other with the liquid entering hole in the following movable chamber of master hydraulic cylinder, when outlet passage one side liquid pressure medium during to a setting value, the outlet oil hydraulic cylinder feed liquor of modulating valve and action, the master hydraulic cylinder inner carrier moves up, and regulates on the head and removes the primary importance that opens valve; When water inlet flow channel one side liquid pressure medium arrives a certain setting value, the imported hydraulic cylinder feed liquor of modulating valve and action, the master hydraulic cylinder inner carrier moves down, and regulates the second place that head moves down throttle down.
2. self-hydraulic according to claim 1, automatic regulating valve is characterized in that: describedly be respectively arranged with the import cut-off valve and export cut-off valve between imported hydraulic cylinder, outlet oil hydraulic cylinder and corresponding water inlet flow channel and outlet passage.
3. self-hydraulic according to claim 1 and 2, automatic regulating valve is characterized in that: the spring that the top of described master hydraulic cylinder is provided with is the pressure adjusting spring of adjustable pressure.
4. self-hydraulic according to claim 1 and 2, automatic regulating valve, it is characterized in that: the described adjustment sleeve that above master hydraulic cylinder, is provided with, above-mentioned spring is arranged in the adjustment sleeve, between the cylinder cap of spring and master hydraulic cylinder, be provided with spring seat, the spring upper end is pressed on the inwall of adjustment sleeve, and the spring lower end is pressed on the spring seat.
5. self-hydraulic according to claim 3, automatic regulating valve, it is characterized in that: the described adjustment sleeve that above master hydraulic cylinder, is provided with, above-mentioned spring is arranged in the adjustment sleeve, between the cylinder cap of spring and master hydraulic cylinder, be provided with spring seat, the spring upper end is pressed on the inwall of adjustment sleeve, and the spring lower end is pressed on the spring seat.
6. self-hydraulic according to claim 1 and 2, automatic regulating valve, it is characterized in that: described adjusting head adopts the whole tungsten carbide structure, regulating head fixedlys connected with the valve rod formation by regulating a fastening piece, valve seat comprises the valve seat overcoat of concentric setting and the valve seat liner of whole tungsten carbide structure, and the valve seat liner is arranged on the inner ring of valve seat overcoat and with the valve seat overcoat and constitutes interference fit.
7. self-hydraulic according to claim 3, automatic regulating valve, it is characterized in that: described adjusting head adopts the whole tungsten carbide structure, regulating head fixedlys connected with the valve rod formation by regulating a fastening piece, valve seat comprises the valve seat overcoat of concentric setting and the valve seat liner of whole tungsten carbide structure, and the valve seat liner is arranged on the inner ring of valve seat overcoat and with the valve seat overcoat and constitutes interference fit.
8. self-hydraulic according to claim 6, automatic regulating valve, it is characterized in that: the described resonance cover that on valve rod, is arranged with, the resonance cover is positioned at the valve seat top, put the horizontal mistake water flow passage of formation in resonance, crossing water flow passage is communicated with outlet passage, there is the gap and forms airtight cavity between the inwall of resonance cover and the outer wall of valve rod, valve rod inside is provided with the pressure compensation opening of perforation, pressure compensation opening one end is communicated with water inlet flow channel by the through hole of regulating on the fastening piece, and the pressure compensation opening the other end is communicated with cavity.
9. self-hydraulic according to claim 7, automatic regulating valve, it is characterized in that: the described resonance cover that on valve rod, is arranged with, the resonance cover is positioned at the valve seat top, put the horizontal mistake water flow passage of formation in resonance, crossing water flow passage is communicated with outlet passage, there is the gap and forms airtight cavity between the inwall of resonance cover and the outer wall of valve rod, valve rod inside is provided with the pressure compensation opening of perforation, pressure compensation opening one end is communicated with water inlet flow channel by the through hole of regulating on the fastening piece, and the pressure compensation opening the other end is communicated with cavity.
10. self-hydraulic according to claim 6, automatic regulating valve, it is characterized in that: the described middle attachment hole that offers axial setting of head of regulating, regulate a fastening piece and be arranged on an adjusting lower end, the attachment hole that the valve rod lower end is passed on the adjusting head is fixedlyed connected with an adjusting fastening piece formation, and the valve seat liner of described Tungsten carbite structure is fixed on the inner ring of valve seat overcoat by the mode of expanding with heat and contract with cold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101000012A CN101586690B (en) | 2009-06-19 | 2009-06-19 | Self-hydraulic automatic regulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101000012A CN101586690B (en) | 2009-06-19 | 2009-06-19 | Self-hydraulic automatic regulation valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101586690A CN101586690A (en) | 2009-11-25 |
| CN101586690B true CN101586690B (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101000012A Active CN101586690B (en) | 2009-06-19 | 2009-06-19 | Self-hydraulic automatic regulation valve |
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| CN (1) | CN101586690B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1401580B1 (en) * | 2010-07-29 | 2013-07-26 | Gea Niro Soavi Spa | MECHANICAL SAFETY VALVE FOR HIGH PRESSURES |
| CN102853101B (en) * | 2011-06-27 | 2013-10-02 | 浙江三花股份有限公司 | Flow control valve |
| CN103090087B (en) * | 2013-02-27 | 2015-04-22 | 张晖 | Pipeline leakage automatic blocking valve |
| CN106490984B (en) * | 2016-11-25 | 2020-07-31 | 泰州乐金电子冷机有限公司 | Drinking machine for refrigerator |
| CN112923086B (en) * | 2019-12-05 | 2022-10-04 | 中国石油天然气股份有限公司 | Pressure regulating valve and pipeline transmission system |
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2009
- 2009-06-19 CN CN2009101000012A patent/CN101586690B/en active Active
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| Publication number | Publication date |
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| CN101586690A (en) | 2009-11-25 |
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Owner name: SHANDONG AUTOTEC AUTOMATIC CONTROL EQUIPMENT CO., Free format text: FORMER OWNER: LIN WENHUA Effective date: 20150309 |
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Effective date of registration: 20150309 Address after: 266000, No. 839, Po Yuen Road, hi tech Development Zone, Shandong, Qingdao Patentee after: Shandong Aoke automation equipment Co., Ltd. Address before: 325100 Zhejiang province Yongjia County Oubei town Huang Tian Dong Jie Yao Village No. 48 Patentee before: Lin Wenhua |