CN113376322A - Switching device for coal-to-gas ratio flow system - Google Patents
Switching device for coal-to-gas ratio flow system Download PDFInfo
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- CN113376322A CN113376322A CN202110585807.6A CN202110585807A CN113376322A CN 113376322 A CN113376322 A CN 113376322A CN 202110585807 A CN202110585807 A CN 202110585807A CN 113376322 A CN113376322 A CN 113376322A
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- gas
- cavity
- gas transmission
- transmission cavity
- coal
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- 230000005540 biological transmission Effects 0.000 claims abstract description 80
- 238000001514 detection method Methods 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000003034 coal gas Substances 0.000 claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 239000003245 coal Substances 0.000 claims abstract description 13
- 238000002309 gasification Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
Abstract
The invention discloses a switching device for a coal gas ratio flow system, and particularly relates to the field of switching devices for coal gas ratio flow systems, which comprises a gas conveying pipe, wherein a detection box is fixedly installed at the top of the gas conveying pipe, a concentration cavity and a mounting groove are formed in the detection box, the mounting groove is communicated with the periphery of the concentration cavity, and a sealing cover plate is movably arranged at the top of the concentration cavity; the bottom of the concentration cavity is fixedly connected with communicating pipes, two groups of communicating pipes are arranged in the horizontal direction, and electromagnetic valves are fixedly installed on the periphery of the communicating pipes; the inside demountable installation exhaust tube and the detection mechanism of mounting groove, and dislocation set between exhaust tube and the detection mechanism, the periphery cover of exhaust tube is equipped with the seal cover No. one, and the seal cover is located the inside of mounting groove. The coal gasification device is provided with the detection box and the central cavity, so that the coal gasification device can be switched to directly detect the coal gasification gas in the first gas transmission cavity and the second gas transmission cavity, and the use is flexible and convenient.
Description
Technical Field
The invention relates to the field of switching devices for coal gas ratio to flow systems, in particular to a switching device for a coal gas ratio to flow system.
Background
The coal gas is generated by gradual coalification or evolution of accumulated organic matters in the coal forming action process, and the gas generating mechanism of the coal gas has two biological causes and a thermal cause from the consideration of the coalification action stage, mode and methane generation mechanism, wherein the biological cause gas is further divided into primary biogas and secondary biogas according to the coalification action stage, and the thermal cause gas is further divided into early thermal cause gas and (narrow sense) thermal cause gas.
When the switching device for the existing coal gas ratio flow system is used, samples need to be collected at the end part of a gas transmission pipe, so that the switching is inconvenient to directly detect the coal gas in a first gas transmission cavity and a second gas transmission cavity, and the switching device is not flexible and convenient to use.
Disclosure of Invention
In order to overcome the above defects in the prior art, an embodiment of the present invention provides a switching device for a coal-to-gas ratio flow rate system, and the technical problem to be solved by the present invention is: how to switch and carry out direct detection to the inside coal gasification of a gas transmission chamber I and a gas transmission chamber II, it is nimble convenient to use.
In order to achieve the purpose, the invention provides the following technical scheme: a switching device for a coal gas ratio flow system comprises a gas pipe, wherein a detection box is fixedly installed at the top of the gas pipe, a concentration cavity and an installation groove are formed in the detection box, the installation groove is communicated with the periphery of the concentration cavity, and a sealing cover plate is movably arranged at the top of the concentration cavity;
the bottom of the concentration cavity is fixedly connected with communicating pipes, two groups of communicating pipes are arranged in the horizontal direction, and electromagnetic valves are fixedly installed on the periphery of the communicating pipes;
an exhaust pipe and a detection mechanism are detachably mounted in the mounting groove, the exhaust pipe and the detection mechanism are arranged in a staggered mode, a first sealing sleeve is sleeved on the periphery of the exhaust pipe, and the first sealing sleeve is located in the mounting groove;
the bottom of the sealing cover plate is fixedly connected with a sealing block, a second sealing sleeve is sleeved on the periphery of the sealing block, two ends of the sealing cover plate are fixedly connected with fixing plates, and fixing holes are formed in the fixing plates.
The implementation mode is as follows: the first gas transmission cavity and the second gas transmission cavity are internally communicated with coal gas with different sources respectively, a data line of the electromagnetic valve penetrates through the inside of the first line hole, the electromagnetic valve corresponding to the first gas transmission cavity is opened, the coal gas in the first gas transmission cavity can be input into the inside of the centralized cavity through a communicating pipe, the exhaust pipe and the detection mechanism are positioned in the mounting groove through a positioning sheet, the detection mechanism can detect the coal gas, the first sealing sleeve can play a sealing role between the exhaust pipe and the mounting groove, one end of the exhaust pipe is connected with the exhaust pump and can exhaust the coal gas in the centralized cavity, when the coal gas in the second gas transmission cavity is detected by switching, the electromagnetic valve corresponding to the first gas transmission cavity in the first gas transmission cavity is closed, the electromagnetic valve corresponding to the second gas transmission cavity is opened, the coal gas in the second gas transmission cavity can be input into the inside of the centralized cavity, and then the detection mechanism detects the coal gas, will concentrate intracavity portion coal gasification and take out after the detection, detection mechanism's data line passes the inside of No. two line holes, it compares to reach the terminal through the data line with detecting data upload, sealed apron passes through the fixed plate, fixed orifices and screw demountable installation are in the top of detection case, sealed piece and No. two seal covers all are located the inside top in concentrated chamber, sealed piece and No. two seal covers play sealed effect at the top in concentrated chamber, the protection casing is installed at the detection roof portion and with sealed apron cover in inside, can prevent to concentrate intracavity portion gas and leak.
In a preferred embodiment, a first gas transmission cavity and a second gas transmission cavity are formed in the gas transmission pipe, the first gas transmission cavity is located at one end of the second gas transmission cavity, the two groups of communicating pipes are respectively communicated with the first gas transmission cavity and the second gas transmission cavity, and coal gas with different sources flows in the first gas transmission cavity and the second gas transmission cavity respectively.
In a preferred embodiment, the bottoms of the first gas transmission cavity and the second gas transmission cavity are fixedly connected with exhaust pipes, and the first gas transmission cavity and the second gas transmission cavity are not communicated with each other, so that coal gas can be discharged conveniently.
In a preferred embodiment, a wire hole is formed in the detection box, and the data line of the electromagnetic valve passes through the inside of the wire hole, so that the data line of the electromagnetic valve passes through the wire hole and is connected with an external device.
In a preferred embodiment, the mounting groove is provided with a second line hole corresponding to the position of the detection mechanism in a communicating manner, and the data line of the detection mechanism passes through the inside of the second line hole, so that the data line of the detection mechanism passes through the second line hole to be connected with an external device.
In a preferred embodiment, a positioning piece is fixedly arranged at one end of the mounting groove close to the concentration cavity, the exhaust tube and the detection mechanism both penetrate through the inside of the positioning piece, and the exhaust tube and the detection mechanism are positioned inside the mounting groove through the positioning piece.
In a preferred embodiment, the top of the detection box is detachably provided with a protective cover, and the sealing cover plate is positioned inside the protective cover and can prevent gas inside the concentration chamber from leaking.
In a preferred embodiment, the sealing block and the second sealing sleeve are both positioned at the top end of the inner part of the concentration cavity, and the sealing cover plate is detachably arranged at the top part of the detection box through a fixing plate, a fixing hole and a screw, so that the mounting and dismounting of the sealing cover plate are facilitated.
The invention has the technical effects and advantages that:
1. according to the invention, the detection box and the central cavity are arranged, so that the direct detection of the coal gas in the first gas transmission cavity and the second gas transmission cavity can be conveniently switched, the use is flexible and convenient, the electromagnetic valve corresponding to the first gas transmission cavity is opened, the coal gas in the first gas transmission cavity can be input into the central cavity through the communicating pipe, the detection mechanism can detect the coal gas, the first sealing sleeve can play a sealing role between the exhaust pipe and the mounting groove, the coal gas in the central cavity can be extracted through the exhaust pipe, when the detection of the coal gas in the second gas transmission cavity is switched, the electromagnetic valve corresponding to the first gas transmission cavity in the first gas transmission cavity is closed, the electromagnetic valve corresponding to the second gas transmission cavity is opened, the coal gas in the second gas transmission cavity can be input into the central cavity, the detection of the coal gas is performed through the detection mechanism, and the coal gas in the central cavity is extracted after the detection is finished;
2. the invention has better sealing and leakage-proof effects by arranging the sealing cover plate and the protective cover, the sealing cover plate is detachably arranged at the top of the detection box through the fixing plate, the fixing hole and the screw, the sealing block and the second sealing sleeve are both positioned at the top end of the inner part of the concentration cavity, the sealing block and the second sealing sleeve play a role in sealing the top of the concentration cavity, and the protective cover is arranged at the top of the detection box and covers the sealing cover plate in the inner part, so that the gas in the inner part of the concentration cavity can be prevented from leaking.
Drawings
Fig. 1 is an overall sectional structure diagram of the present invention.
FIG. 2 is a schematic view of the structure of the detection box of the present invention.
Fig. 3 is an enlarged view of the structure at a in fig. 2 according to the present invention.
FIG. 4 is a schematic view of the structure of the air pumping tube of the present invention.
Fig. 5 is a schematic view of a sealing cover structure according to the present invention.
The reference signs are: 1. a gas delivery pipe; 11. a first gas transmission cavity; 12. a second gas transmission cavity; 13. an exhaust pipe; 2. a detection box; 21. a first wire hole; 3. a concentration chamber; 31. a communicating pipe; 32. an electromagnetic valve; 4. mounting grooves; 41. an air exhaust pipe; 42. a detection mechanism; 43. a second wire hole; 44. a first sealing sleeve; 45. positioning plates; 5. sealing the cover plate; 51. a sealing block; 52. a second sealing sleeve; 53. a fixing plate; 54. a fixing hole; 6. a shield.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a switching device for a coal-to-gas ratio flow system, which comprises a gas pipe 1, wherein a detection box 2 is fixedly installed at the top of the gas pipe 1, a concentration cavity 3 and an installation groove 4 are formed in the detection box 2, the installation groove 4 is communicated with the periphery of the concentration cavity 3, and a sealing cover plate 5 is movably arranged at the top of the concentration cavity 3;
the bottom of the concentration chamber 3 is fixedly connected with communicating pipes 31, two groups of communicating pipes 31 are arranged in the horizontal direction, and electromagnetic valves 32 are fixedly arranged on the periphery of the communicating pipes 31;
the air exhaust pipe 41 and the detection mechanism 42 are detachably mounted in the mounting groove 4, the air exhaust pipe 41 and the detection mechanism 42 are arranged in a staggered mode, a first sealing sleeve 44 is sleeved on the periphery of the air exhaust pipe 41, and the first sealing sleeve 44 is located in the mounting groove 4;
the bottom of the sealing cover plate 5 is fixedly connected with a sealing block 51, a second sealing sleeve 52 is sleeved on the periphery of the sealing block 51, two ends of the sealing cover plate 5 are fixedly connected with fixing plates 53, and fixing holes 54 are formed in the fixing plates 53.
A first gas transmission cavity 11 and a second gas transmission cavity 12 are formed in the gas transmission pipe 1, the first gas transmission cavity 11 is located at one end of the second gas transmission cavity 12, and the two groups of communicating pipes 31 are respectively communicated with the first gas transmission cavity 11 and the second gas transmission cavity 12.
The bottoms of the first gas transmission cavity 11 and the second gas transmission cavity 12 are fixedly connected with an exhaust pipe 13, and the first gas transmission cavity 11 is not communicated with the second gas transmission cavity 12.
A first wire hole 21 is formed in the detection box 2, and a data wire of the electromagnetic valve 32 penetrates through the first wire hole 21.
The position of the mounting groove 4 corresponding to the detection mechanism 42 is provided with a second line hole 43 in a communicating manner, and the data line of the detection mechanism 42 passes through the inside of the second line hole 43.
And one end of the mounting groove 4, which is close to the concentration cavity 3, is fixedly provided with a positioning sheet 45, and the exhaust tube 41 and the detection mechanism 42 both penetrate through the positioning sheet 45.
The top of detection case 2 can be dismantled and be equipped with protection casing 6, sealed apron 5 is located the inside of protection casing 6.
The sealing block 51 and the second sealing sleeve 52 are both positioned at the top end of the interior of the concentration cavity 3, and the sealing cover plate 5 is detachably mounted at the top of the detection box 2 through a fixing plate 53, a fixing hole 54 and screws.
As shown in fig. 1 to 4, the embodiment specifically is: when the device is used, coal gas with different sources flows in the first gas transmission cavity 11 and the second gas transmission cavity 12 respectively, the data line of the electromagnetic valve 32 penetrates through the inside of the first line hole 21, the electromagnetic valve 32 corresponding to the first gas transmission cavity 11 is opened, the coal gas in the first gas transmission cavity 11 can be input into the concentrated cavity 3 through the communicating pipe 31, the air exhaust pipe 41 and the detection mechanism 42 are positioned in the installation groove 4 through the positioning sheet 45, the detection mechanism 42 can detect the coal gas, the first sealing sleeve 44 can play a sealing role between the air exhaust pipe 41 and the installation groove 4, one end of the air exhaust pipe 41 is connected with the air exhaust pump, the coal gas in the concentrated cavity 3 can be exhausted, the electromagnetic valve 32 corresponding to the first gas transmission cavity 11 of the first gas transmission cavity 11 is closed, the electromagnetic valve 32 corresponding to the second gas transmission cavity 12 is opened, and the coal gas in the second gas transmission cavity 12 can be input into the concentrated cavity 3, detect the coal gasification through detection mechanism 42 again, will concentrate the inside coal gasification in chamber 3 after the detection and take out, the data line of detection mechanism 42 passes the inside of No. two line holes 43, through the data line with detect data upload to the terminal and compare, wholly be convenient for switch over and carry out direct detection to the inside coal gasification in gas transmission chamber 11 and No. two gas transmission chamber 12, it is nimble convenient to use.
As shown in fig. 1, 2 and 5, the embodiment specifically is: sealed apron 5 passes through fixed plate 53, fixed orifices 54 and screw demountable installation are in the top of detection case 2, sealed piece 51 and No. two seal cartridge 52 all are located the inside top of concentrated chamber 3, sealed piece 51 and No. two seal cartridge 52 play sealed effect at the top of concentrated chamber 3, protection casing 6 is installed at detection case 2 top and will seal apron 5 covers in inside, can prevent that the inside gas in concentrated chamber 3 from leaking, wholly has the better sealed effect of preventing leaking.
The working principle of the invention is as follows:
referring to the attached drawings 1-5 of the specification, the insides of the first gas transmission cavity 11 and the second gas transmission cavity 12 respectively circulate coal gas of different sources, a data line of the electromagnetic valve 32 passes through the inside of the first line hole 21, the electromagnetic valve 32 corresponding to the first gas transmission cavity 11 is opened, the coal gas inside the first gas transmission cavity 11 can be input into the inside of the central cavity 3 through the communicating pipe 31, the gas pumping pipe 41 and the detection mechanism 42 are positioned inside the mounting groove 4 through the positioning sheet 45, the detection mechanism 42 can detect the coal gas, the first sealing sleeve 44 can play a sealing role between the gas pumping pipe 41 and the mounting groove 4, one end of the gas pumping pipe 41 is connected with a gas pumping pump, the coal gas inside the central cavity 3 can be pumped out, when the coal gas detection of the second gas transmission cavity 12 is switched, the electromagnetic valve 32 corresponding to the first gas transmission cavity 11 is closed, the electromagnetic valve 32 corresponding to the second gas transmission cavity 12 is opened, can be with the inside of the concentrated chamber 3 of the inside coal gasification input of No. two gas transmission chamber 12, rethread detection mechanism 42 detects the coal gasification, will concentrate the inside coal gasification of chamber 3 and take out after the detection, detection mechanism 42's data line passes the inside of No. two line holes 43, it compares to reach the terminal through the data line with detecting data upload, sealed apron 5 is through fixed plate 53, fixed orifices 54 and screw demountable installation are in the top of detection case 2, sealed piece 51 and No. two seal covers 52 all are located the inside top of concentrated chamber 3, sealed piece 51 and No. two seal covers 52 play sealed effect at the top of concentrated chamber 3, protection casing 6 is installed at detection case 2 top and will seal the apron 5 covers in inside, can prevent that the inside gas of concentrated chamber 3 from leaking.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. The utility model provides a coal is gas ratio and is compared auto-change over device for flow system, includes gas-supply pipe (1), its characterized in that: the top of the gas conveying pipe (1) is fixedly provided with a detection box (2), a concentration cavity (3) and a mounting groove (4) are formed in the detection box (2), the mounting groove (4) is communicated with the periphery of the concentration cavity (3), and the top of the concentration cavity (3) is movably provided with a sealing cover plate (5);
the bottom of the concentration cavity (3) is fixedly connected with communicating pipes (31), two groups of communicating pipes (31) are arranged in the horizontal direction, and electromagnetic valves (32) are fixedly arranged on the periphery of the communicating pipes (31);
an air exhaust pipe (41) and a detection mechanism (42) are detachably mounted in the mounting groove (4), the air exhaust pipe (41) and the detection mechanism (42) are arranged in a staggered mode, a first sealing sleeve (44) is sleeved on the periphery of the air exhaust pipe (41), and the first sealing sleeve (44) is located in the mounting groove (4);
the bottom of the sealing cover plate (5) is fixedly connected with a sealing block (51), a second sealing sleeve (52) is sleeved on the periphery of the sealing block (51), fixing plates (53) are fixedly connected to the two ends of the sealing cover plate (5), and fixing holes (54) are formed in the fixing plates (53).
2. The switching device for the coal gas ratio flow system according to claim 1, wherein: a first gas transmission cavity (11) and a second gas transmission cavity (12) are formed in the gas transmission pipe (1), the first gas transmission cavity (11) is located at one end of the second gas transmission cavity (12), and the two groups of communicating pipes (31) are communicated with the first gas transmission cavity (11) and the second gas transmission cavity (12) respectively.
3. The switching device for the coal gas ratio flow system according to claim 2, wherein: the bottoms of the first gas transmission cavity (11) and the second gas transmission cavity (12) are fixedly connected with an exhaust pipe (13), and the first gas transmission cavity (11) and the second gas transmission cavity (12) are not communicated with each other.
4. The switching device for the coal gas ratio flow system according to claim 1, wherein: a wire hole (21) is formed in the detection box (2), and a data wire of the electromagnetic valve (32) penetrates through the wire hole (21).
5. The switching device for the coal gas ratio flow system according to claim 1, wherein: the position of the mounting groove (4) corresponding to the detection mechanism (42) is communicated with a second line hole (43), and a data line of the detection mechanism (42) penetrates through the interior of the second line hole (43).
6. The switching device for the coal gas ratio flow system according to claim 1, wherein: the mounting groove (4) is close to one end of the concentration cavity (3) and is fixedly provided with a positioning sheet (45), and the air exhaust pipe (41) and the detection mechanism (42) penetrate through the positioning sheet (45).
7. The switching device for the coal gas ratio flow system according to claim 1, wherein: the top of detection case (2) can be dismantled and be equipped with protection casing (6), sealed apron (5) are located the inside of protection casing (6).
8. The switching device for the coal gas ratio flow system according to claim 1, wherein: the sealing block (51) and the second sealing sleeve (52) are both located at the top end of the interior of the concentration cavity (3), and the sealing cover plate (5) is detachably mounted at the top of the detection box (2) through a fixing plate (53), a fixing hole (54) and a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110585807.6A CN113376322A (en) | 2021-05-27 | 2021-05-27 | Switching device for coal-to-gas ratio flow system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110585807.6A CN113376322A (en) | 2021-05-27 | 2021-05-27 | Switching device for coal-to-gas ratio flow system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113376322A true CN113376322A (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110585807.6A Pending CN113376322A (en) | 2021-05-27 | 2021-05-27 | Switching device for coal-to-gas ratio flow system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113376322A (en) |
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Application publication date: 20210910 |
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| RJ01 | Rejection of invention patent application after publication |