CN113757548B - Floating rod type gas drainer - Google Patents
Floating rod type gas drainer Download PDFInfo
- Publication number
- CN113757548B CN113757548B CN202010496322.5A CN202010496322A CN113757548B CN 113757548 B CN113757548 B CN 113757548B CN 202010496322 A CN202010496322 A CN 202010496322A CN 113757548 B CN113757548 B CN 113757548B
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- rod
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- guide rod
- pipe
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- 238000007667 floating Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 49
- 238000005192 partition Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 239000003034 coal gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
- F16T1/386—Actuating mechanisms for lift valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Float Valves (AREA)
Abstract
The invention provides a floating rod type gas drainer, which aims at the situation that gas condensate contains more impurities, and firstly, the impurities of the condensate are effectively separated in a gravity sedimentation mode, and then the condensate enters a drainage link. Based on the buoyancy of the floating ball and the lever principle, the floating ball is lifted by means of the change of the water level, and is opened and closed by the transmission of lever force, so that drainage is realized. When the pressure of the gas fluctuates in a certain range, the position of the floating ball is not changed, and the opening and closing actions are not generated, so that the problem that the water seal drainer breaks down due to the fluctuation of the pressure of the gas is solved. And a compound water seal structure is integrated, so that a double-seal structure of water seal and mechanical seal is formed, and the absolute guarantee of operation safety is realized.
Description
Technical Field
The technology relates to the technical field of gas condensate water discharge equipment, and is mainly used for a gas drainer for discharging condensate water of a metallurgical gas pipeline.
Background
In the process of pipeline transportation, saturated water in the coal gas is condensed due to environmental factors, and the saturated water is discharged in time through a coal gas drainer so as to prevent the condensed water from being accumulated, reduce the section of the pipeline and prevent the coal gas from being transported. The current gas condensate water discharging equipment adopts a water seal type gas drainer, and the drainer is generally only applicable to low and medium pressure gas pipelines below 50 kPa. Under the condition that the pressure of the coal gas reaches 50 kPa-300 kPa, the water seal drainer can hardly solve the problem of discharging the condensed water of the coal gas due to the restriction of the height of the water seal.
In addition, because the fluctuation of the gas pressure of the gas pipe network, such as the abnormal great rise of the pressure of the pipe network, even being larger than the rated water seal height of the drainer, the possibility of breakdown of the water seal can occur, and once the water seal breaks down, the condition of massive leakage of gas can occur, thereby causing safety accidents.
The water seal gas drainer also needs to be provided with a water supply facility, and water is replenished to increase the discharge amount of wastewater.
When the purely mechanical floating rod type gas drainer is adopted, the influence of factors such as aging of an internal sealing element, condensed water impurities and the like is possibly caused when the operation time is too long, and the possibility of gas leakage due to poor sealing is possibly caused.
Disclosure of Invention
The technology is a gas drainer designed by the principle of lever buoyancy. The buoyancy generated by the floating ball is utilized to transmit the buoyancy through the lever moment, thereby realizing the discharge of the gas condensate, and the compound water seal structure is integrated, so that the drainer has the functions of water seal and mechanical double seal, and the purpose of more reliable, safe and stable operation is realized.
The drainage mechanism of the floating rod type gas drainer is characterized in that one end of a lever is used as a fixed fulcrum, the other end of the lever is a floating end, a middle fulcrum is a movable point, the middle fulcrum is consistent with the movement direction of the floating end, the floating end is a power generation end, and the middle fulcrum is a power output point.
The technical scheme is that the floating rod type gas drainer comprises: barrel, barrel annex and inner structure are constituteed, and the barrel is inside to divide two rooms, room I, II. A partition plate is arranged between the chamber I and the chamber II. The chamber I has the dual functions of water seal and precipitation separation of impurities in condensed water, the chamber II is a drainage control chamber, and the drainage mechanism is positioned in the chamber II.
The cylinder is a closed container consisting of an upper cover plate, a lower bottom plate and an outer side plate, and is separated by a middle partition plate which is vertically arranged and is divided into a chamber I and a chamber II.
The upper flange of the chamber I cover plate is an inlet flange, one end of the inlet flange is installed on the chamber I cover plate through a pipeline and communicated with the chamber I, and the other end of the inlet flange is connected with a gas pipeline downpipe valve.
A short pipe of an inlet flange of an upper cover plate of the chamber I and a cover plate of the chamber II are connected through pipes, a check valve is arranged, the direction from the chamber II to the inlet flange is through, and otherwise, the pressure equalizing of the chamber II is achieved.
The lower part of the outer side plate of the cylinder body is provided with a blow-down valve and a hand hole corresponding to the chamber I and the chamber II respectively for blow-down and maintenance.
The flange cover plate is managed to be arranged above the chamber II cover plate of the cylinder body, and is used for disassembling and overhauling parts of an internal mechanism of the chamber II.
The outside of the cylinder II is provided with a drain pipe which is a condensate outlet and leads out condensate of a drainer.
The lower part of the cover plate of the chamber I is connected with a water seal vertical pipe which is coincident with the maintaining axis of the inlet flange pipe, the other end of the water seal vertical pipe is suspended to receive condensed water from a gas pipeline and form a first-stage water seal, and the condensed water is precipitated and separated into impurities in the condensed water in the chamber I by gravity.
Preferably, the middle partition plate is formed by staggering two plates, is communicated in the chamber I and is communicated in the chamber II, a certain distance is kept between the two plates to form a channel, a second-stage water seal is formed, condensed water enters from the upper part of the partition plate of the chamber I, passes through the middle channel of the two plates, and enters the chamber II from the bottom of the chamber II.
The second chamber receives condensed water from the impurity separation of the first chamber, and the second chamber is drained through a drainage mechanism.
The drainage mechanism consists of a floating rod part, a guide part and a valve table part. The floating rod part opens and closes the valve port on the valve plate through the guide part to realize the opening and closing of the drainer.
The floating rod part consists of a floating ball, a lever, a deflector rod and a support column, wherein the floating ball is connected with one end of the lever, the other end of the lever is hinged with the support column, the middle fulcrum of the lever is connected with one end of the deflector rod, the middle fulcrum of the lever is shorter from the support column and is farther from the floating ball, the lifting of the floating ball drives the lever and the deflector rod to swing in an arc shape by taking the support column as a fulcrum, and the deflector rod is preferably L-shaped.
The guide member includes a sliding guide bar and a sealing guide bar. One end of the sliding guide rod is lifted or fallen by the deflector rod, and the other end of the sliding guide rod is connected with the sealing guide rod. The sliding guide rod consists of a short pipe and a section of round steel, the pipe wall of the short pipe is vertically connected with the round steel in the radial direction, the L-shaped hook head of the deflector rod slides in the short pipe of the sliding guide rod, and the sliding guide rod is used as a power transmission rod from the deflector rod to the sealing guide rod. The sliding guide rod and the axis of the sealing guide rod are kept coincident. The sealing guide rod consists of a sealing cover, a sealing body and a guide pipe, the sealing cover of the sealing guide rod is vertically connected with round steel of the sliding guide rod, a pair of openings are formed in the circumference of the sealing cover and are matched with an anti-rotation rod on the valve platen, the guide pipe of the sealing guide rod is sleeved into a positioning guide rod on the valve platen, the sealing guide rod is provided with the sealing body, the sealing body is inlaid in the sealing cover, the valve port is opened when the sealing guide rod rises, the valve port is closed when the sealing guide rod falls, and the sealing guide rod is guided by the positioning guide rod to finish vertical actions. The axes of the sliding guide rod, the sealing guide rod and the positioning guide rod are kept coincident, and the sliding guide rod and the sealing guide rod vertically move up and down along the positioning guide rod.
The valve table member functions as a table for the drain mechanism. The valve table member includes: a valve platen, a valve port, a positioning guide tube and an anti-rotation rod. The plane of the valve bedplate is a support column which is horizontally arranged in the II chamber and is provided with a floating rod component. The valve port is tubular, the positioning guide pipe is a short pipe and is connected to the bottom surface of the valve platen, and the valve port and the positioning guide pipe keep the axis coincident. The function of the anti-rotation rod is to prevent the rotation of the seal guide rod.
The positioning guide rod is positioned in the positioning guide pipe at the lower part of the valve platen, and the axis of the positioning guide rod is coincident with the axis of the positioning guide pipe.
The lower part of the valve platen is correspondingly connected with a drain pipe, preferably, the drain pipe is L-shaped, and the other end of the drain pipe extends out of the cylinder body.
The sliding guide rod, the sealing guide rod, the valve port, the positioning guide pipe and the positioning guide rod all keep the axis coincident.
The gas drainer designed by the technology cancels water supply facilities, reduces investment, overcomes the defect that the water seal drainer is easy to break down, integrates a water seal structure, and has more powerful functions.
Drawings
Fig. 1 is a schematic diagram of a chamber ii in front cross section, fig. 2 is a schematic diagram of a chamber ii in front cross section, fig. 3 is a schematic diagram of a top view, and fig. 4 is a schematic diagram of details of parts.
1 Barrel, 2 support column, 3 drain pipe, 4 driving lever, 5 lever, 6 floater, 7 slip guide bar, 7.1 nozzle stub, 7.2 round steel, 8 sealed guide bar, 8.1 sealed lid, 8.2 sealed body, 8.3 pipe, 9 location guide bar, 10 location guide tube, 11 maintenance flange cover, 12 entry flange, 13 maintenance hand hole, 14 blowoff valve, 15 baffle, 16 prevent bull stick, 17 valve port, 18 valve platen, 19 water seal riser, 20 communicating pipe, 21 check valve.
Detailed Description
The present technology is further illustrated by way of example with reference to the accompanying drawings.
In the embodiment, condensed water in an external gas pipeline enters the chamber I through the inlet flange 12, gravity impurity sedimentation is carried out in the chamber I, then the settled condensed water enters the chamber II through the partition plate, when the water level rises to a certain position, the condensed water floats the floating ball 6, the lever 5 swings upwards in an arc shape by taking the supporting column 2 as the center of a circle, the deflector rod 4 drives the sliding guide rod 7 and the sealing guide rod 8 to lift, the valve port 17 is opened, and water drainage is realized. When the water level drops to a certain position, the water makes the floating ball 6 drop, the lever 5 takes the support 2 as the center of a circle and swings downwards in an arc shape, the deflector rod 4 drives the sliding guide rod 7 and the sealing guide rod 8 to drop, the valve port 17 is closed, reliable closing is realized, the space pressure above the liquid level in the chamber II is kept equal to the pressure of the inlet pipe through the communicating pipe 20 on the cylinder body, and the problems of pressure holding and unsmooth water drainage in the chamber II are prevented.
Claims (7)
1. The utility model provides a float rod type gas drainer which is characterized in that the constitution includes: the water draining device comprises a cylinder body (1), a supporting column (2), a draining pipe (3), a deflector rod (4), a lever (5), a floating ball (6), a sliding guide rod (7), a sealing guide rod (8), a positioning guide rod (9), a positioning guide pipe (10), an overhaul flange cover (11), an inlet flange (12), an overhaul hand hole (13), a draining valve (14), a partition plate (15), a rotation preventing rod (16), a valve port (17), a valve table plate (18), a water sealing vertical pipe (19), a communicating pipe (20) and a check valve (21); the cylinder body (1) is a closed container with a lower bottom plate, an upper cover plate and an outer side plate, the interior of the cylinder body (1) is divided into a chamber I and a chamber II by a middle partition plate (15), an inlet flange (12) is connected to the chamber I, an overhaul flange cover (11) is connected to the chamber II, a communication pipe (20) is added between a short pipe of the inlet flange (12) of the chamber I and the chamber II, the communication pipe (20) is provided with a check valve (21), and the side plate of the cylinder body (1) is connected with an overhaul hand hole (13) and a blow-down valve (14); The lower part of the chamber I cover plate is connected with a water seal vertical pipe (19) which is coincident with the holding axis of the inlet flange (12) pipe; a channel is reserved on a partition board (15) between the chamber I and the chamber II, the middle partition board (15) is formed by staggering two boards, and a certain interval is kept between the two boards to form the channel; the drainage mechanism in the II chamber consists of a floating rod part, a guide part and a valve table part; the floating rod part consists of a floating ball (6), a lever (5), a deflector rod (4) and a support column (2); the floating ball (6) is connected with one end of the lever (5), the other end of the lever (5) is hinged with the support column (2), and the middle fulcrum of the lever (5) is connected with one end of the deflector rod (4); the guide part consists of a sliding guide rod (7) and a sealing guide rod (8); one end of the sliding guide rod (7) is lifted or fallen by the deflector rod (4), and the other end is connected with the sealing guide rod (8); the sealing guide rod (8) consists of a sealing cover (8.1), a sealing body (8.2) and a guide pipe (8.3); one end of the sealing guide rod (8) is connected with the sliding guide rod (7), a guide pipe (8.3) at the other end of the sealing guide rod (8) is sleeved into a positioning guide rod (9) on the valve platen (18), and a sealing body (8.2) is arranged on the sealing guide rod (8); the valve table component is a workbench of a drainage mechanism and comprises a valve table plate (18), a valve port (17), a positioning guide pipe (10) and an anti-rotation rod (16); A support column (2) of a floating rod part is arranged on the valve bedplate (18); the lower part of the valve bedplate (18) is connected with the drain pipe (3) corresponding to the valve port (17); the inlet flange (12) is positioned on the upper cover plate of the cylinder body (1), the inlet flange (12) is connected with a gas pipeline downpipe, and is used for receiving condensed water from the gas pipeline, and precipitating and separating impurities in the condensed water in the chamber I; the device comprises a short pipe of an inlet flange (12) of an upper cover plate of a chamber I and a communication pipe (20) between the inlet flange of the chamber II, wherein a check valve (21) is arranged, the direction of the check valve (21) is that the chamber II is communicated with the direction of the pipe of the inlet flange (12), the pressure of the chamber II keeps consistent with the pressure of the inlet pipe, an overhaul flange cover (11) is arranged on the cover plate of a cylinder body (1), overhaul hand holes (13) are respectively arranged at the lower part of an outer side plate, a blow-down valve (14) extends out of a drain pipe (3) outside the cylinder body (1), one end of the blow-down valve is connected to the bottom of a valve bedplate (18), the other end of the blow-down valve extends out of the cylinder body (1), and the drain pipe (3) is an outlet for discharging condensed water; the inside of the cylinder body (1) is divided into two chambers, a water seal vertical pipe (19) is connected below a chamber I cover plate and coincides with the holding axis of an inlet flange (12) pipe, the other end of the water seal vertical pipe (19) is suspended, the water seal vertical pipe (19) is arranged in a chamber I and plays a role in establishing a first-stage water seal, the chamber I also plays a role in settling impurities introduced into condensed water, and the condensed water in a chamber II is drained through a drainage mechanism; the I and II chambers are separated by a baffle (15), the middle baffle (15) is formed by staggering two plates, the two plates are communicated with each other in the I chamber and the two plates are communicated with each other in the II chamber, a certain distance is kept between the two plates to form a channel, condensed water enters from the upper part of the baffle (15) of the I chamber, enters from the lower part of the baffle (15) of the II chamber, and forms a second-stage water seal.
2. A float-rod gas drainer according to claim 1, characterized in that the support column (2) of the float-rod member is a fixed fulcrum of the lever (5), one end of the support column (2) is seated on the valve platen (18), and the other end is hinged with one end of the lever (5).
3. The floating rod type gas drainer according to claim 1, wherein one end of a lever (5) of the floating rod part is hinged with a supporting column (2), the other end is connected with a floating ball (6), and the middle fulcrum is connected with a deflector rod (4); the support column (2) is a fixed fulcrum of the lever (5), and the middle fulcrum is a movable fulcrum; the floating ball (6) is used as a closed container for generating buoyancy, the shape of the floating ball (6) is a polyhedron comprising a sphere, and the floating ball (6) is connected with one end of the lever (5); the middle fulcrum is shorter from the support column (2), the distance from the floating ball (6) is longer, the deflector rod (4) is L-shaped, one end of the deflector rod is connected with the middle fulcrum of the lever (5), and the other end of the deflector rod is suspended; the lever (5) takes the supporting column (2) as a fulcrum, and the floating ball (6) drives the deflector rod (4) to do arc-shaped movement through the lever (5).
4. A floating-rod-type gas drainer according to claim 1, characterized in that the guide member slides the guide rod (7) as a power transmission rod from the deflector rod (4) to the seal guide rod (8); the sliding guide rod (7) consists of a short tube (7.1) and a section of round steel (7.2), the outer wall of the short tube (7.1) is vertically connected with the round steel (7.2), the short tube (7.1) of the sliding guide rod (7) is in sliding connection with the deflector rod (4), the suspended end point of the L-shaped deflector rod (4) slides in the short tube (7.1) of the sliding guide rod (7), and the round steel (7.2) at the other end of the sliding guide rod (7) is connected with the sealing guide rod (8).
5. The floating rod type gas drainer according to claim 1, wherein the guiding component seals the guiding rod (8) as the component with sealing and guiding functions, including sealing cover (8.1), sealing body (8.2), conduit (8.3), sealing cover (8.1) of one end of sealing guiding rod (8) is connected with round steel (7.2) of sliding guiding rod (7) vertically, conduit (8.3) of the other end of sealing guiding rod (8) is sleeved into positioning guiding rod (9) and connected in cooperation, sealing body (8.2) is inlaid in sealing cover (8.1); the positioning guide rod (9) is used as a positioning rod piece of the sealing guide rod (8), the vertical motion of the sealing guide rod (8) is guided, and the axes of the sliding guide rod (7), the sealing guide rod (8) and the positioning guide rod (9) are kept coincident.
6. A floating-rod gas drainer according to claim 1, characterized in that the positioning guide rod (9) is fixed on one end of the positioning guide tube (10) of the valve platen (18); the positioning guide pipe (10) is a fixed foundation of the positioning guide rod (9) and is positioned at the lower part of the valve bedplate (18); the positioning guide rod (9) is positioned in the positioning guide tube (10) and keeps coincident with the axis of the positioning guide tube (10).
7. A floating-rod gas drainer according to claim 1, characterized in that the valve port (17), the positioning guide pipe (10), the anti-rotation rod (16) are arranged on the valve platen (18) of the valve table member; the valve bedplate (18) is horizontally arranged in the II chamber, and a support column (2) of the floating rod part is arranged on the valve bedplate (18); the valve port (17) is a tubular object, the axis is perpendicular to the valve platen (18) and connected, the direction of a working opening of the valve port (17) is upward, and the valve port (17), the positioning guide pipe (10) and the positioning guide rod (9) keep the axis coincident; the anti-rotation rods (16) on the valve table plate (18) are a pair and are also vertically arranged on the valve table plate (18) so as to prevent the rotation of the sealing guide rod (8); the drain pipe (3) is L-shaped, one end of the drain pipe is arranged at the lower part of the valve platen (18) and corresponds to the valve port (17), and the other end of the drain pipe is led out of the cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496322.5A CN113757548B (en) | 2020-06-03 | 2020-06-03 | Floating rod type gas drainer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496322.5A CN113757548B (en) | 2020-06-03 | 2020-06-03 | Floating rod type gas drainer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113757548A CN113757548A (en) | 2021-12-07 |
| CN113757548B true CN113757548B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010496322.5A Active CN113757548B (en) | 2020-06-03 | 2020-06-03 | Floating rod type gas drainer |
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| Country | Link |
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| CN (1) | CN113757548B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212960867U (en) * | 2020-06-03 | 2021-04-13 | 唐山泽中科技有限公司 | Float rod type gas drainer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008286239A (en) * | 2007-05-15 | 2008-11-27 | Tlv Co Ltd | Lever float type drain trap |
| CN107883188A (en) * | 2017-12-10 | 2018-04-06 | 卢守友 | Float rod type coal gas drainer |
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2020
- 2020-06-03 CN CN202010496322.5A patent/CN113757548B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212960867U (en) * | 2020-06-03 | 2021-04-13 | 唐山泽中科技有限公司 | Float rod type gas drainer |
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| CN113757548A (en) | 2021-12-07 |
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