CN211116951U - Exhaust device for liquid return pipeline - Google Patents
Exhaust device for liquid return pipeline Download PDFInfo
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- CN211116951U CN211116951U CN201922048287.6U CN201922048287U CN211116951U CN 211116951 U CN211116951 U CN 211116951U CN 201922048287 U CN201922048287 U CN 201922048287U CN 211116951 U CN211116951 U CN 211116951U
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Abstract
The utility model relates to a return liquid pipeline exhaust apparatus belongs to safety ring and protects the field, this return liquid pipeline exhaust apparatus, include: the liquid level display device comprises a first liquid containing cavity, a second liquid containing cavity and a liquid level display device, wherein the first liquid containing cavity is provided with a liquid inlet, a gas outlet and the liquid level display device, and the display end of the liquid level display device is positioned outside the first liquid containing cavity; the bottom of the second liquid containing cavity is provided with a liquid outlet; a liquid discharging pipe; a pipette having an inlet and an outlet, the inlet being lower than the outlet; the utility model discloses whether have gas in use ability direct observation device, can cooperate and estimate out hydraulic equipment hydraulic pressure intracavity gas content, whether need change for the hydraulic equipment sealing member and provide the foundation to because the gas of separating in with hydraulic equipment is kept apart by the buffer solution, the gas of having avoided the separation contacts the field work personnel, thereby has protected field work personnel.
Description
Technical Field
The utility model belongs to the safety ring protects field, concretely relates to return liquid pipeline exhaust apparatus.
Background
Hydraulic devices operating in a pressurized gas environment, the sealing elements, in particular dynamic seals, which are in contact with the gas run the risk of gas entering the hydraulic chamber of the hydraulic device over a long period of time.
When the amount of gas entering the hydraulic chamber of the hydraulic equipment reaches a certain amount, the normal operation of the equipment is affected, so that the gas needs to be discharged, and the entering gas is replaced by the circulation of hydraulic oil.
In the process of implementing the embodiments of the present invention, the inventor finds that at least the following defects exist in the background art:
after the hydraulic equipment replaces the gas by using a common method, the gas quantity cannot be estimated, and then whether the sealing element needs to be replaced cannot be judged, and when the gas is toxic and harmful gas, the risk of personnel injury exists.
SUMMERY OF THE UTILITY MODEL
The utility model provides a return liquid pipeline exhaust apparatus, aim at solve above-mentioned problem, solve hydraulic equipment and use general method with the gas replacement back, unable estimation gas volume, and then can't judge whether the sealing member needs to be changed, when this gas is poisonous and harmful gas, have the problem that personnel received the risk of injury moreover.
In order to achieve the above object, the utility model adopts the following technical scheme:
a drainback line vent, comprising:
the liquid level display device comprises a first liquid containing cavity, a second liquid containing cavity and a liquid level display device, wherein the first liquid containing cavity is provided with a liquid inlet, a gas outlet and the liquid level display device, and the display end of the liquid level display device is positioned outside the first liquid containing cavity;
the bottom of the second liquid containing cavity is provided with a liquid outlet;
a liquid discharging pipe;
a pipette having an inlet and an outlet, the inlet being lower than the outlet;
the second holds the sap cavity, the bleeder tube and the pipette and is located first appearance sap cavity, and the second holds the sap cavity and is located first appearance sap cavity bottom, and the leakage fluid dram that the second held the sap cavity communicates with first appearance sap cavity outside, and the import of pipette is located first appearance sap cavity bottom, and the export of pipette is located the second and holds the sap cavity top, and bleeder tube one end is connected with the inlet, and the other end is located the import with high position between the export, the gas outlet is located first appearance sap cavity top.
A part of the line in the middle of the pipette is higher than the level of the inlet and the outlet.
The side wall of the first liquid containing cavity is provided with a lowest liquid level line and a highest liquid level line, the lowest liquid level line is as high as the outlet of the liquid suction pipe, and the highest liquid level line is as high as the highest part of the liquid suction pipe.
The middle pipeline of the liquid discharge pipe is spiral.
The liquid level display device is characterized in that a top cover, an observation barrel and a base are arranged outside the first liquid containing cavity, the first liquid containing cavity is formed by the top cover, the observation barrel and the base in a surrounding mode, the top cover is connected with one end of the observation barrel, the base is connected with the other end of the observation barrel, at least one part of barrel body of the observation barrel is made of transparent materials, and the liquid level display device is a transparent material part of the barrel body on the observation barrel.
A positioning rod is arranged between the top cover and the base, and the top cover is detachably and fixedly connected with the base through the positioning rod.
The second holds the sap cavity and has air chamber roof, an air chamber section of thick bamboo and base outward, and the second holds the sap cavity and is enclosed by air chamber roof, an air chamber section of thick bamboo and base, and air chamber roof and an air chamber section of thick bamboo are located first and hold the sap cavity, and the air chamber roof passes through an air chamber section of thick bamboo to be connected with the base, and the leakage fluid dram passes through base and external intercommunication.
One end of the liquid discharge pipe, which is positioned between the inlet and the outlet, is in an inclined opening shape.
The beneficial effects of the utility model are that, the utility model discloses in use can the direct observation device in have or not gaseous, can cooperate and estimate out hydraulic equipment hydraulic pressure intracavity gas content, whether need change for the hydraulic equipment sealing member and provide the foundation to because the gas of separating in with hydraulic equipment is kept apart by the barrier fluid, the gas of having avoided the separation contacts the field work personnel, thereby has protected field work personnel.
Drawings
Fig. 1 is a schematic view of the overall structure of a liquid return pipeline exhaust device of the present invention;
fig. 2 is a schematic view of the overall structure of a method for using the exhaust device of the liquid return pipeline according to the present invention.
Labeled as: 1. a base; 11. a base plate; 12. a pipette; 13. an air chamber cylinder; 14. a liquid discharge port; 15. a gas chamber top plate; 16. a lower mounting plate; 2. an observation cylinder; 3. a top cover; 31. a top plate; 32. a liquid inlet; 33. a liquid discharging pipe; 34. an air outlet; 35. an upper mounting plate; 4. a seal member; 5. positioning a rod; 51. positioning the rod body; 52. positioning the gasket; 53. positioning a nut; 6. a mounting member; 61. installing a bolt; 62. mounting a plate; 7. a first liquid containing chamber; 8. a second liquid containing cavity.
Detailed Description
The exhaust scheme of the liquid return pipeline provided by the embodiments of the present invention will be described in detail through several specific embodiments.
Example 1
Please refer to fig. 1, which shows a schematic diagram of an overall structure of a liquid return pipeline exhaust apparatus of the present invention, the liquid return pipeline exhaust apparatus includes:
the liquid level display device comprises a first liquid containing cavity 7, wherein the first liquid containing cavity 7 is provided with a liquid inlet 32, a gas outlet 34 and a liquid level display device, and the display end of the liquid level display device is positioned outside the first liquid containing cavity 7;
a second liquid containing cavity 8, wherein the bottom of the second liquid containing cavity 8 is provided with a liquid discharging port 14;
a liquid discharge pipe 33;
a pipette 12, the pipette 12 having an inlet and an outlet, the inlet being lower than the outlet;
the second liquid containing cavity 8, the liquid discharging pipe 33 and the liquid suction pipe 12 are located in the first liquid containing cavity 7, the second liquid containing cavity 8 is located at the bottom of the first liquid containing cavity 7, the liquid discharging port 14 of the second liquid containing cavity 8 is communicated with the outside of the first liquid containing cavity 7, the inlet of the liquid suction pipe 12 is located at the bottom of the first liquid containing cavity 7, the outlet of the liquid suction pipe 12 is located at the top of the second liquid containing cavity 8, one end of the liquid discharging pipe 33 is connected with the liquid inlet 32, the other end of the liquid discharging pipe is located at the height position between the inlet and the outlet, and the gas outlet 34 is located at the top of the first liquid containing cavity 7.
In the above embodiment, the first liquid containing cavity 7 is used for containing hydraulic oil in hydraulic equipment, and through the action of gravity, gas and liquid in the hydraulic oil are subjected to sedimentation separation, the gas rises to the top of the first liquid containing cavity 7 due to the action of gravity, and the hydraulic oil sinks to the bottom of the first liquid containing cavity 7.
The second liquid containing cavity 8 is used for outputting the hydraulic oil after gas separation and conveying the hydraulic oil to the outside of the first liquid containing cavity 7.
The liquid suction pipe 12 conveys the hydraulic oil from which the gas is separated from the bottom in the first liquid containing chamber 7 into the second liquid containing chamber 8.
The liquid discharging pipe 33 drains the hydraulic oil from the liquid inlet 32 of the first liquid containing cavity 7 into the first liquid containing cavity 7, and the outlet of the liquid discharging pipe is lower than the outlet of the liquid sucking pipe 12, so that the gas separated from the first liquid containing cavity 7 can be prevented from flowing back into the liquid discharging pipe 33 under the condition of normal operation of the liquid sucking pipe 12, and the gas is higher than the inlet of the liquid sucking pipe 12, so that the hydraulic oil with bubbles in the first liquid containing cavity 7 can be prevented from flowing into the liquid sucking pipe 12.
The second liquid containing cavity 8 is positioned at the bottom in the first liquid containing cavity 7, and the combination of the second liquid containing cavity 8 and the first liquid containing cavity 7 can safely separate and output gas in the hydraulic oil.
This device is when using, only needs to be connected hydraulic equipment's oil-out and the inlet 32 that returns liquid pipeline exhaust apparatus, will return liquid pipeline exhaust apparatus's leakage fluid dram 14 with return the liquid case and be connected can, hydraulic equipment can come out the gas separation in the hydraulic oil at normal work, this application is used portably, simple to operate to compatibility with current equipment is better.
Example 2
Further, referring to fig. 1, in another embodiment of the exhaust device for the liquid return pipeline of the present invention, a portion of the pipeline in the middle of the liquid suction pipe 12 is higher than the height of the inlet and the outlet.
In the above embodiment, a part of the line in the middle of the pipette 12 is higher than the level of the inlet and the outlet, so that the pipette 12 is equivalent to a communicating vessel placed upside down, and the middle of the pipette 12 can further prevent the gas separated from the hydraulic oil from being discharged from the liquid-returning line exhaust device.
Example 3
Further, referring to fig. 1, in another embodiment of the air exhausting device for the liquid return pipeline of the present invention, the sidewall of the first liquid containing cavity 7 has a lowest liquid level line 9 and a highest liquid level line 91, the lowest liquid level line 9 is the same as the outlet height of the liquid suction pipe 12, and the highest liquid level line 91 is the same as the highest position of the liquid suction pipe 12.
In the above-described embodiment, the lowest liquid level line 9 and the highest liquid level line 91 of the first liquid containing chamber 7 are provided for the purpose of measuring the volume of gas contained in the hydraulic device in cooperation with the fixed displacement pump, since the highest liquid level line 91 is located at the highest portion of the pipette 12, when the hydraulic oil in the hydraulic equipment is filled to the position of the highest liquid level line 91, the liquid in the pipette 12 is communicated, a siphon is formed, and then the hydraulic oil in the liquid return pipeline exhaust device is pumped away by the liquid suction pipe 12 until the hydraulic oil in the liquid return pipeline exhaust device is lowered to the position of the lowest liquid level line 9, the hydraulic oil at the highest liquid level line 91 and the highest liquid level line 91 are fixed, so that the volume from the highest liquid level line 91 to the bottom is determined and is a fixed value, the hydraulic oil that can pour into liquid return pipeline exhaust apparatus to hydraulic equipment plays the measuring action, and minimum liquid level line 9 also can play the measuring action with the same reason.
Further, referring to fig. 1, in another embodiment of the exhaust device for the liquid return pipeline according to the present invention, the liquid suction pipe 12 is a siphon.
In the above embodiment, the liquid suction pipe 12 is a siphon pipe to ensure that the hydraulic oil flows from the first liquid containing chamber 7 to the second liquid containing chamber 8, and the hydraulic oil flows out in a manner that the hydraulic oil is pressed into the second liquid containing chamber 8 to ensure that the hydraulic oil is completely from the bottom in the first liquid containing chamber 7.
Example 4
Further, referring to fig. 1, in another embodiment of the exhaust device for the liquid return pipeline of the present invention, the middle pipeline of the liquid discharge pipe 33 is spiral.
In the above embodiment, the middle pipeline of the liquid discharging pipe 33 is spiral, which can generate a certain retarding effect on the hydraulic pressure, so that the hydraulic pressure is more stable when flowing into the first liquid containing cavity 7, and the separation of the hydraulic oil and the gas is facilitated.
Example 5
Further, please refer to fig. 1, the utility model relates to a return liquid pipeline exhaust apparatus's another embodiment, first holding the sap cavity 7 and having top cap 3, observing cylinder 2 and base 1 outward, first holding the sap cavity 7 and being enclosed by top cap 3, observing cylinder 2 and base 1, top cap 3 is connected and is observed 2 one end of cylinder, and the base 1 is connected and is observed 2 other ends of cylinder, at least a part barrel of observing cylinder 2 is transparent material, liquid level display device is the transparent material part of barrel on observing cylinder 2.
In the above embodiment, the first liquid containing cavity 7 is formed by the top cover 3, the observation cylinder 2 and the base 1, the first liquid containing cavity 7 is internally not required to bear too high pressure, so the composition structure of the first liquid containing cavity can be formed by detachably connecting multiple parts, the sealing element 4 is arranged between the top cover 3 and the observation cylinder 2, the top cover 3 is hermetically connected with the observation cylinder 2 through the sealing element 4, the sealing element 4 is also arranged between the observation cylinder 2 and the base 1, the observation cylinder 2 is hermetically connected with the base 1 through the sealing element 4, part or all of the observation cylinder 2 is in a transparent state, and the situation of gas collected inside the liquid return pipeline exhaust device can be conveniently and visually observed by field personnel by observing the situation of the liquid level inside the observation cylinder 2, so that the poor sealing performance of the hydraulic equipment is judged, and the.
Example 6
Further, please refer to fig. 1, in another embodiment of the exhaust apparatus for liquid return pipeline of the present invention, a positioning rod 5 is disposed between the top cover 3 and the base 1, and the top cover 3 is detachably and fixedly connected to the base 1 through the positioning rod 5.
In the above embodiment, the positioning rod 5 is arranged between the top cover 3 and the base 1, and the positioning rod 5 is used for supporting and connecting the top cover 3 and the base 1, so that the connection between the top cover 3 and the base 1 and the observation tube 2 is tighter.
Example 7
Further, please refer to fig. 1, according to another embodiment of the exhaust apparatus for liquid return pipeline of the present invention, the second container liquid chamber 8 is externally provided with an air chamber top plate 15, an air chamber tube 13 and a base 1, the second container liquid chamber 8 is enclosed by the air chamber top plate 15, the air chamber tube 13 and the base 1, the air chamber top plate 15 and the air chamber tube 13 are located in the first container liquid chamber 7, the air chamber top plate 15 is connected with the base 1 through the air chamber tube 13, and the liquid discharge port 14 is communicated with the outside through the base 1.
In the above embodiment, the second liquid containing cavity 8 also adopts a detachable connection mode, which can facilitate the manufacturing difficulty and cost reduction of the whole device of the application.
Example 8
Further, referring to fig. 1, in another embodiment of the exhaust device of the liquid return pipeline of the present invention, an end of the liquid discharge pipe 33 between the inlet and the outlet is in an oblique opening shape.
In the above embodiment, the outlet of the liquid discharge pipe 33 is formed in an inclined opening shape, so that the gas-liquid separation effect at the outlet of the liquid discharge pipe 33 can be enhanced.
Furthermore, the bottom of the base 1 is provided with a plane bottom plate 11 or a bottom plate 11 with a shape matched with that of a connecting object, so that the connection of the liquid return pipeline exhaust device can be more stable.
Furthermore, both sides of the base 1 are provided with lower mounting plates 16, and the lower mounting plates 16 are detachably and fixedly connected with the connecting object.
Further, roof 31 has at the top of top cap 3, and roof 31 is the skeleton, is responsible for providing the bearing strength.
Furthermore, the top cover 3 is provided with upper mounting plates 35 at two sides, and the upper mounting plates 35 can be detachably and fixedly connected with the connecting object.
Furthermore, the positioning rod 5 is provided with a positioning rod body 51, and the positioning rod body 51 is responsible for providing the bearing strength.
Furthermore, two ends of the positioning rod 5 are respectively provided with a positioning gasket 52, a positioning nut 53, an installation part 6 and an installation bolt 61, and the positioning rod 5 is respectively detachably and fixedly connected with the base 1 and the top cover 3 through the positioning gasket 52, the positioning nut 53, the installation part 6 and the installation bolt 61.
Example 9
Please refer to fig. 2, which shows an overall structure diagram of the whole structure of the usage method of the exhaust device of the liquid return pipeline according to the present invention, the usage method of the exhaust device of the liquid return pipeline includes:
step 1, installing a liquid return pipeline exhaust device between hydraulic equipment and a liquid return tank, wherein the installation height of the liquid return pipeline exhaust device is higher than that of the liquid return tank of the hydraulic equipment, a liquid inlet of the liquid return pipeline exhaust device is connected with the top of an oil cavity of the hydraulic equipment, and a liquid outlet of the liquid return pipeline exhaust device is connected with the liquid return tank;
and 6, acquiring a final gas volume V = V + (V1 + V2+ V3+ … + Vx), wherein V is the final gas volume in the hydraulic equipment, V is the gas volume calculated for the first time, V1 is the gas volume obtained by repeating the step 5 for the first time, V2 is the gas volume obtained by repeating the step 5 for the second time, and Vx is the gas volume obtained by repeating the step 5 for the X time.
In the above embodiment, firstly
(1) Installation:
the installation is that firstly, the liquid return pipeline exhaust device is fixed on the top cover of the liquid return box or other wall surfaces higher than the liquid return box, and then the liquid discharge port of the liquid return pipeline exhaust device directly faces the liquid return box, or is connected with the liquid return box through a large-diameter pipeline (the outlet of the large-diameter pipeline is required to be above the maximum height of the liquid level of the liquid return box, and a full flow cross section cannot appear in the liquid discharge process of the maximum liquid discharge amount); and observing and replenishing the liquid level of the hydraulic oil in the exhaust device of the liquid return pipeline to ensure that the liquid level reaches the lowest liquid level line 9, and connecting an air outlet 34 of the exhaust pipeline with an external exhaust pipeline.
(2) Judging whether gas exists or not:
when the existence of gas in the hydraulic equipment needs to be judged, and liquid is discharged after the hydraulic equipment works, the existence of bubbles at the outlet of the liquid discharging pipe 33 in the liquid return pipeline exhaust device is observed until the liquid supply amount of the constant delivery pump is enough to circulate for one circle;
(3) and (3) estimating the gas content in cooperation:
if bubbles are generated at the outlet of the liquid discharging pipe, the liquid level height displayed by a liquid level display device of the liquid return pipeline exhaust device is observed to estimate the liquid return volume of the liquid return cavity by matching with a hydraulic cavity of the hydraulic equipment circulating hydraulic equipment of a constant delivery pump of the hydraulic equipment, so that the gas amount in the hydraulic cavity of the hydraulic equipment is judged.
The gas quantity that separates in the direct observation device of this embodiment in use provides the basis for whether need change for hydraulic equipment sealing member to because the gas that separates in with hydraulic equipment is kept apart by the barrier fluid, avoided the gas that separates to contact field work personnel, thereby protected field work personnel.
Further, when the liquid return pipeline exhaust device 10 is installed in a hydraulic device, hydraulic oil in a liquid return tank 20 outside the hydraulic device 60 is connected with the bottom of the hydraulic device 60 through a metering pump 70 and a liquid supply pipeline 80, the top of the hydraulic device 60 is connected with the liquid return pipeline exhaust device 10 through a stop valve 50 and a liquid return pipeline 40, and an exhaust port of the liquid return pipeline exhaust device 10 is connected with outdoor atmosphere through an exhaust pipe 30.
Example 10
Further, please refer to fig. 2, another embodiment of the present invention is a method for using an exhaust apparatus of a liquid return pipeline, wherein an isolation liquid is filled in the exhaust apparatus of the liquid return pipeline, the isolation liquid can be indicated by a color after reacting with a toxic and harmful gas, the density of the isolation liquid is less than that of hydraulic oil, and the isolation liquid is insoluble in the isolation liquid.
In the above embodiment, the exhaust device of the liquid return line is filled with the spacer fluid, the spacer fluid may be hydraulic oil or other liquid which can react with toxic and harmful gases and then has a color indication, and the density of the spacer fluid is less than or equal to that of the hydraulic oil in the liquid return line. And the service performance of the liquid in the liquid return tank is not influenced.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions related to "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Technical solutions between various embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (8)
1. A fluid return line exhaust apparatus, comprising:
the liquid level display device comprises a first liquid containing cavity (7), wherein the first liquid containing cavity (7) is provided with a liquid inlet (32), a gas outlet (34) and a liquid level display device, and the display end of the liquid level display device is positioned outside the first liquid containing cavity (7);
a second liquid containing cavity (8), wherein the bottom of the second liquid containing cavity (8) is provided with a liquid discharging port (14);
a liquid discharge pipe (33);
a pipette (12), the pipette (12) having an inlet and an outlet, the inlet being lower than the outlet;
the second holds liquid chamber (8), bleeder tube (33) and pipette (12) and is located first and hold liquid chamber (7), and second holds liquid chamber (8) and is located first and hold liquid chamber (7) bottom in, and the leakage fluid dram (14) and the first outside intercommunication that holds liquid chamber (7) of second hold liquid chamber (8), and the import of pipette (12) is located first and holds liquid chamber (7) bottom, and the export of pipette (12) is located second and holds liquid chamber (8) top, and bleeder tube (33) one end is connected with inlet (32), and the other end is located the import with the high position between the export, gas outlet (34) are located first and hold liquid chamber (7) top.
2. A return line venting device according to claim 1, characterized in that a part of the line in the middle of the suction pipe (12) is higher than the level of the inlet and the outlet.
3. A liquid return line venting device according to claim 2, characterized in that the side wall of the first liquid receiving chamber (7) has a lowest level (9) and a highest level (91), the lowest level (9) being at the same height as the outlet of the liquid suction pipe (12) and the highest level (91) being at the same height as the highest part of the liquid suction pipe (12).
4. The drainback line vent assembly of claim 1, wherein the central line of the drain tube (33) is helical.
5. The exhaust device of the liquid return pipeline according to claim 1, wherein the first liquid containing cavity (7) is externally provided with a top cover (3), an observation cylinder (2) and a base (1), the first liquid containing cavity (7) is defined by the top cover (3), the observation cylinder (2) and the base (1), the top cover (3) is connected with one end of the observation cylinder (2), the base (1) is connected with the other end of the observation cylinder (2), at least a part of the cylinder body of the observation cylinder (2) is made of a transparent material, and the liquid level display device is a transparent material part of the cylinder body on the observation cylinder (2).
6. The liquid return pipeline exhaust device according to claim 5, characterized in that a positioning rod (5) is arranged between the top cover (3) and the base (1), and the top cover (3) is detachably and fixedly connected with the base (1) through the positioning rod (5).
7. The exhaust device of the liquid return pipeline according to claim 1, wherein the second liquid containing cavity (8) is externally provided with an air chamber top plate (15), an air chamber cylinder (13) and a base (1), the second liquid containing cavity (8) is surrounded by the air chamber top plate (15), the air chamber cylinder (13) and the base (1), the air chamber top plate (15) and the air chamber cylinder (13) are positioned in the first liquid containing cavity (7), the air chamber top plate (15) is connected with the base (1) through the air chamber cylinder (13), and the liquid discharge port (14) is communicated with the outside through the base (1).
8. A liquid return line exhaust apparatus according to claim 1, wherein the end of the liquid discharge tube (33) between the inlet and the outlet is diagonally open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922048287.6U CN211116951U (en) | 2019-11-25 | 2019-11-25 | Exhaust device for liquid return pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922048287.6U CN211116951U (en) | 2019-11-25 | 2019-11-25 | Exhaust device for liquid return pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211116951U true CN211116951U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922048287.6U Active CN211116951U (en) | 2019-11-25 | 2019-11-25 | Exhaust device for liquid return pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211116951U (en) |
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2019
- 2019-11-25 CN CN201922048287.6U patent/CN211116951U/en active Active
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Effective date of registration: 20201113 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute Patentee before: CHINA NATIONAL PETROLEUM Corp. Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |