CN112460592A - Mounting structure of high temperature resistant combustor mouth - Google Patents
Mounting structure of high temperature resistant combustor mouth Download PDFInfo
- Publication number
- CN112460592A CN112460592A CN202011364960.8A CN202011364960A CN112460592A CN 112460592 A CN112460592 A CN 112460592A CN 202011364960 A CN202011364960 A CN 202011364960A CN 112460592 A CN112460592 A CN 112460592A
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- groove
- mounting
- burner nozzle
- block
- spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a high-temperature-resistant burner nozzle mounting structure which comprises a mounting pipe and a burner nozzle, wherein a connecting pipe is mounted on the burner nozzle, the connecting pipe is mounted in the mounting pipe and abuts against the inner wall of the mounting pipe, a mounting ring is fixedly connected to the burner nozzle, a first spring is fixedly connected to the mounting ring, the opposite side of the first spring and the mounting ring abuts against the side wall of the mounting pipe, two connecting blocks are mounted on the burner nozzle, connecting rods are fixedly connected to the opposite sides of the two connecting blocks and the mounting pipe, two clamping grooves are formed in the outer wall of the connecting pipe, two sliding grooves are formed in the inner wall of the mounting pipe, and fixing plates are slidably connected in the two sliding grooves. The burner nozzle is reasonable in structure, the burner nozzle can be installed and disassembled only by pressing, the operation is simple and convenient, workers can replace the burner nozzle conveniently, meanwhile, the burner nozzle can be installed conveniently by pressing, and the stability after installation is sufficient.
Description
Technical Field
The invention relates to the technical field of burners, in particular to a mounting structure of a high-temperature-resistant burner nozzle.
Background
The burner is a general term for a device for ejecting fuel and air in a certain manner to perform mixed combustion. The burners are divided into industrial burners, civil burners and special burners according to types and application fields; the material is made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or metallic titanium; the burner functions to atomize the sample by flame combustion. The atomized test solution enters a combustor, and a large amount of ground state atoms, partial excited state atoms, ions and molecules are generated through the processes of drying, melting, evaporation, dissociation and the like under the action of flame temperature and flame atmosphere; a well-designed burner should have the performances of high atomization efficiency, low noise and stable flame so as to ensure higher absorption sensitivity and measurement precision; a common slit burner in atomic absorption spectroscopy generates atomic vapor; the length and width of the burner gap are different according to the type of the used fuel gas and the combustion-supporting gas, and the applicable fuel gas and the combustion-supporting gas are marked on the common burner.
The burner nozzles are installed at the fire spraying ends of the burners, so that the existing burner nozzles are inconvenient to install, are mostly connected through threads, are easy to loosen although the structure is simple, and are easy to fall off; secondly, the burner mouth damages when using and is comparatively inconvenient along with its change, mainly because the temperature is higher, so a convenient combustor mouth of dismantling is very important, therefore we have designed the mounting structure of a high temperature resistant burner mouth and have solved above problem.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the mounting structure of the high-temperature resistant burner nozzle, which can be mounted and dismounted only by pressing, is simple and convenient to operate, is convenient to replace by workers, can be mounted conveniently by pressing, and has sufficient stability after mounting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-temperature-resistant burner nozzle mounting structure comprises a mounting pipe and a burner nozzle, wherein the burner nozzle is provided with a connecting pipe, the connecting pipe is mounted inside the mounting pipe and is abutted against the inner wall of the mounting pipe, the burner nozzle is fixedly connected with a mounting ring, the mounting ring is fixedly connected with a first spring, one surface of the first spring, which is opposite to the mounting ring, is abutted against the side wall of the mounting pipe, the burner nozzle is provided with two connecting blocks, one surface of each connecting block, which is opposite to the mounting pipe, is fixedly connected with a connecting rod, the outer wall of the connecting pipe is provided with two clamping grooves, the inner wall of the mounting pipe is provided with two sliding grooves, fixed plates are respectively and slidably connected in the two sliding grooves, the two fixed plates are respectively arranged opposite to the two clamping grooves, a clamping mechanism is arranged between the sliding groove, the fixed plate and the clamping groove at the same side, and one, the homonymy be equipped with damping mechanism, two between mounting groove and the connecting rod all be equipped with in the mounting groove with clamping mechanism complex release mechanism.
Preferably, the connecting block is T-shaped, and the connecting block is connected with the burner nozzle by two bolts.
Preferably, the clamping mechanism includes the fixture block that runs through the fixed plate and rather than fixed connection, the one end of fixture block extends to in the draw-in groove, just the inner wall sliding connection of fixture block and draw-in groove, fixedly connected with second spring between fixed plate and the sliding tray, the second spring housing is on the fixture block, run through being equipped with on the installation pipe with the communicating groove that the sliding tray communicates, the one end of fixture block extends to in the communicating groove, just the fixture block sets up with the inner wall slip in communicating groove.
Preferably, the transverse length of the clamping groove is larger than that of the clamping block.
Preferably, the damping mechanism includes the damping groove that runs through the connecting rod setting, the damping groove is linked together through air vent and mounting groove, sliding connection has the damping board in the damping groove, it is equipped with the damping hole to run through on the damping board, fixedly connected with third spring between the inner wall in damping board and damping groove.
Preferably, the unlocking mechanism comprises a moving block which is connected with the mounting groove in a sliding manner, a fourth spring is fixedly connected between the moving block and the mounting groove, an unlocking block is fixedly connected to the side, opposite to the fourth spring, of the moving block, the unlocking block extends into the communicating groove, and the unlocking block abuts against the clamping block.
Preferably, the stiffness coefficient of the fourth spring is greater than the stiffness coefficient of the second spring.
Preferably, an inclined plane is arranged on the unlocking block, and the inclined plane is arranged opposite to the burner mouth.
Preferably, the mounting pipe is fixedly connected with two U-shaped blocks, and the two connecting rods respectively penetrate through the U-shaped blocks on the same side and are in sliding connection with the U-shaped blocks.
Compared with the prior art, the invention has the beneficial effects that:
1. push down the installation pipe, so make the combustor mouth remove to the installation pipe direction, the connecting block removes and drives connecting rod and unblock piece and remove, the inclined plane offsets with the inner wall of intercommunication groove this moment, it is spacing under the inner wall of intercommunication groove, make unblock piece and movable block rebound, the movable block rebound promotes the air flow in the mounting groove, the damping plate jack-up is pushed up to the air that flows, discharge through damping groove and damping hole, then the unblock piece breaks away from the intercommunication groove, then the fixture block is no longer spacing, under the effect of second spring, the fixture block breaks away from the draw-in groove, then fixture block rebound, but its tip can not bulge the intercommunication groove, so the connecting pipe is no longer spacing, under the effect of first spring, can pop out the combustor mouth, connecting pipe part breaks away from the installation pipe promptly, so realize the dismantlement to the combustor mouth.
2. When installing the combustor mouth, run through U type piece with two connecting rods, then the connecting pipe is installed in the installation pipe, when needing to pay attention, need press the unblock piece and remove, make its outer wall counterbalance with the installation pipe, then press the combustor mouth, can realize the connecting rod removal as follows, when unblock piece and intercommunication groove are relative time, unblock piece offsets and drives its removal with the fixture block, the fixture block card is gone into in the draw-in groove this moment, so realize the installation to the combustor mouth, stability after the installation is sufficient, easy operation is convenient.
In conclusion, the burner nozzle is reasonable in structure, the burner nozzle can be installed and disassembled only by pressing, the operation is simple and convenient, the burner nozzle is convenient for workers to replace, meanwhile, the burner nozzle can be installed conveniently by pressing, and the stability after installation is sufficient.
Drawings
FIG. 1 is a schematic structural view of a high temperature resistant burner nozzle mounting structure according to the present invention;
FIG. 2 is a schematic view of a structure at A in an installation structure of a high temperature resistant burner nozzle proposed by the present invention;
FIG. 3 is a schematic view of a structure at B in the installation structure of a high temperature resistant burner nozzle proposed by the present invention;
FIG. 4 is a side view of a U-shaped block in a high temperature resistant burner nozzle mounting structure according to the present invention.
In the figure: the combustor comprises a mounting pipe 1, a combustor nozzle 2, a connecting block 3, a bolt 4, a connecting rod 5, a U-shaped block 6, a connecting pipe 7, a clamping groove 8, a mounting ring 9, a first spring 10, a sliding groove 11, a fixing plate 12, a clamping block 13, a second spring 14, a communication groove 15, an inclined surface 16, an unlocking block 17, a moving block 18, a mounting groove 19, a fourth spring 20, a vent groove 21, a damping groove 22, a third spring 23, a damping plate 24 and a damping hole 25.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-4, a high temperature resistant burner nozzle mounting structure comprises a mounting tube 1 and a burner nozzle 2, wherein the burner nozzle 2 is provided with a connecting tube 7, the connecting tube 7 is mounted inside the mounting tube 1 and abuts against the inner wall of the mounting tube 1, and the outer wall of the connecting tube 7 is matched with the inner wall of the mounting tube 1; fixedly connected with collar 9 on the combustor mouth 2, the first spring 10 of fixedly connected with on the collar 9, the one side that first spring 10 and collar 9 carried on the back mutually offsets with the lateral wall of installation pipe 1, through the elasticity of first spring 10, conveniently pops out the connecting pipe 7 in the installation pipe 1, and then conveniently dismantles combustor mouth 2.
Two connecting blocks 3 are installed on the combustor nozzle 2, the connecting blocks 3 are in a T shape, the connecting blocks 3 are connected with the combustor nozzle 2 through two bolts 4, and thread grooves for installing the bolts 4 are formed in the corresponding combustor nozzle 2; the connecting rods 5 are fixedly connected to the opposite surfaces of the two connecting blocks 3 and the mounting pipe 1, the two U-shaped blocks 6 are fixedly connected to the mounting pipe 1, and the two connecting rods 5 penetrate through the U-shaped blocks 6 on the same side and are connected with the same in a sliding mode respectively, so that the stable sliding of the connecting rods 5 is guaranteed; the outer wall of connecting pipe 7 is equipped with two draw-in grooves 8, and the inner wall of installation pipe 1 is equipped with two sliding tray 11, and equal sliding connection has fixed plate 12 in two sliding tray 11, and two fixed plates 12 set up with two draw-in grooves 8 respectively relatively.
And the sliding chute 11 of homonymy, be equipped with clamping mechanism between fixed plate 12 and the draw-in groove 8, clamping mechanism is including running through fixed plate 12 and rather than fixed connection's fixture block 13, the one end of fixture block 13 extends to in the draw-in groove 8, and the inner wall sliding connection of fixture block 13 and draw-in groove 8, fixedly connected with second spring 14 between fixed plate 12 and the sliding chute 11, second spring 14 overlaps on fixture block 13, run through being equipped with on the installation pipe 1 with the communicating groove 15 that communicates with sliding chute 11, the one end of fixture block 13 extends to in the communicating groove 15, and the inner wall sliding arrangement of fixture block 13 and communicating groove 15, through the cooperation of fixture block 13 and draw-in groove 8, can be greater than the transverse length of fixture block 13 with the stable connection of connection pipe 7 and installation pipe 1 of draw-in groove 8 together, so can.
The one side that two connecting rods 5 are relative all is equipped with mounting groove 19, is equipped with damping mechanism between the mounting groove 19 of homonymy and the connecting rod 5, and damping mechanism is including the damping slot 22 that runs through connecting rod 5 and set up, and damping slot 22 is linked together through air channel 21 and mounting groove 19, and sliding connection has damping plate 24 in the damping slot 22, runs through on the damping plate 24 and is equipped with damping hole 25, fixedly connected with third spring 23 between the inner wall of damping plate 24 and damping slot 22.
Specifically, when the connecting pipe 7 is separated from the mounting pipe 1, under the action of the fourth spring 20, the moving block 18 and the unlocking block 17 reset, and air can only enter the mounting groove 19 through the damping hole 25, so that the moving block 18 and the unlocking block 17 reset very slowly in the process that the connecting pipe 7 is separated from the mounting pipe 1, and the unlocking block 17 cannot be clamped into the communicating groove 15 again.
An unlocking mechanism matched with the clamping mechanism is arranged in each of the two mounting grooves 19, the unlocking mechanism comprises a moving block 18 which is connected in the mounting grooves 19 in a sliding mode, a fourth spring 20 is fixedly connected between the moving block 18 and the mounting grooves 19, and the stiffness coefficient of the fourth spring 20 is larger than that of the second spring 14; the side, opposite to the fourth spring 20, of the moving block 18 is fixedly connected with an unlocking block 17, an inclined surface 16 is arranged on the unlocking block 17, and the inclined surface 16 is opposite to the burner nozzle 2; the unlocking block 17 extends into the communication groove 15, and the unlocking block 17 abuts against the latch 13.
Specifically, connecting block 3 removes and drives connecting rod 5 and unblock piece 17 and remove, inclined plane 16 offsets with the inner wall of intercommunication groove 15 this moment, under the inner wall of intercommunication groove 15 is spacing, make unblock piece 17 and movable block 18 rebound, movable block 18 rebound promotes the air flow in the mounting groove 19, the air that flows pushes up damping plate 24, discharge through damping groove 22 and damping hole 25, then unblock piece 17 breaks away from intercommunication groove 15, then fixture block 13 is no longer spacing, under the effect of second spring 14, fixture block 13 breaks away from draw-in groove 8, then fixture block 13 rebound, but its tip can not bulge intercommunication groove 15, so connecting pipe 7 is no longer spacing, under the effect of first spring 10, can pop out combustor mouth 2, connecting pipe 7 part breaks away from installation pipe 1 promptly, so realize the dismantlement to combustor mouth 2.
In the invention, when the burner mouth 2 needs to be disassembled, a worker can operate the installation tube 1 to enable the burner mouth 2 to be abutted against the ground and then press the installation tube 1 downwards, so that the burner mouth 2 moves towards the installation tube 1, the burner mouth 2 moves to drive the connecting block 3, the connecting tube 7 and the installation ring 9 to move, and at the moment, the first spring 10 is in a compressed state, and the clamping block 13 slides in the clamping groove 8;
the connecting block 3 moves to drive the connecting rod 5 and the unlocking block 17 to move, at the moment, the inclined surface 16 abuts against the inner wall of the communication groove 15, the unlocking block 17 and the moving block 18 move upwards under the limiting of the inner wall of the communication groove 15, the moving block 18 moves upwards to push air in the mounting groove 19 to flow, the flowing air jacks up the damping plate 24 and is discharged through the damping groove 22 and the damping hole 25, the unlocking block 17 is separated from the communication groove 15, the clamping block 13 is not limited any more, the clamping block 13 is separated from the clamping groove 8 under the action of the second spring 14, the clamping block 13 moves upwards, but the end part of the clamping block does not protrude out of the communication groove 15, the connecting pipe 7 is not limited any more, the burner nozzle 2 can be popped out under the action of the first spring 10, namely, the connecting pipe 7 is partially separated from the mounting pipe 1, and the dismounting of;
when the connecting pipe 7 is separated from the mounting pipe 1, the moving block 18 and the unlocking block 17 reset under the action of the fourth spring 20, and air can only enter the mounting groove 19 through the damping hole 25, so that the moving block 18 and the unlocking block 17 reset slowly in the process that the connecting pipe 7 is separated from the mounting pipe 1, and the unlocking block 17 cannot be clamped into the communication groove 15 again;
when installing combustor mouth 2, run through U type piece 6 with two connecting rods 5, then connecting pipe 7 is installed in installation pipe 1, when needing to notice, need press unblock piece 17 and remove, make its outer wall with installation pipe 1 offset, then press combustor mouth 2, can realize connecting rod 5 as follows and remove, when unblock piece 17 is relative with intercommunication groove 15, unblock piece 17 offsets with fixture block 13 and drives its removal, fixture block 13 card is gone into in draw-in groove 8 this moment, so realize the installation to combustor mouth 2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The mounting structure of the high-temperature-resistant burner nozzle comprises a mounting pipe (1) and a burner nozzle (2), and is characterized in that the burner nozzle (2) is provided with a connecting pipe (7), the connecting pipe (7) is mounted inside the mounting pipe (1) and is abutted against the inner wall of the mounting pipe, the burner nozzle (2) is fixedly connected with a mounting ring (9), the mounting ring (9) is fixedly connected with a first spring (10), the side, opposite to the mounting ring (9), of the first spring (10) is abutted against the side wall of the mounting pipe (1), the burner nozzle (2) is provided with two connecting blocks (3), the side, opposite to the mounting pipe (1), of the two connecting blocks (3) is fixedly connected with a connecting rod (5), the outer wall of the connecting pipe (7) is provided with two clamping grooves (8), the inner wall of the mounting pipe (1) is provided with two sliding grooves (11), two equal sliding connection has fixed plate (12), two in sliding tray (11) fixed plate (12) set up with two draw-in grooves (8) respectively relatively, and homonymy be equipped with clamping mechanism, two between sliding tray (11), fixed plate (12) and draw-in groove (8) the one side that connecting rod (5) is relative all is equipped with mounting groove (19), the homonymy be equipped with damping mechanism, two between mounting groove (19) and connecting rod (5) all be equipped with in mounting groove (19) with clamping mechanism complex release mechanism.
2. A high temperature resistant burner nozzle mounting structure according to claim 1, characterized in that the connection block (3) is T-shaped and the connection block (3) is connected to the burner nozzle (2) by two bolts (4).
3. The mounting structure of the high temperature resistant burner nozzle according to claim 1, wherein the clamping mechanism includes a clamping block (13) penetrating through and fixedly connected to the fixing plate (12), one end of the clamping block (13) extends into the clamping groove (8), the clamping block (13) is slidably connected to an inner wall of the clamping groove (8), a second spring (14) is fixedly connected between the fixing plate (12) and the sliding groove (11), the second spring (14) is sleeved on the clamping block (13), a communicating groove (15) communicating with the sliding groove (11) is penetrated through the mounting tube (1), one end of the clamping block (13) extends into the communicating groove (15), and the clamping block (13) and the inner wall of the communicating groove (15) are slidably disposed.
4. A high temperature resistant burner nozzle mounting structure as claimed in claim 3, wherein the lateral length of the catching groove (8) is greater than the lateral length of the catching block (13).
5. The mounting structure of a high temperature resistant burner nozzle according to claim 4, characterized in that the damping mechanism comprises a damping groove (22) disposed through the connecting rod (5), the damping groove (22) is communicated with the mounting groove (19) through a vent groove (21), a damping plate (24) is slidably connected in the damping groove (22), a damping hole (25) is disposed through the damping plate (24), and a third spring (23) is fixedly connected between the damping plate (24) and the inner wall of the damping groove (22).
6. The mounting structure of the high temperature resistant burner nozzle according to claim 3, wherein the unlocking mechanism comprises a moving block (18) which is slidably connected in a mounting groove (19), a fourth spring (20) is fixedly connected between the moving block (18) and the mounting groove (19), an unlocking block (17) is fixedly connected to a surface of the moving block (18) opposite to the fourth spring (20), the unlocking block (17) extends into the communicating groove (15), and the unlocking block (17) abuts against the clamping block (13).
7. A high temperature resistant burner nozzle mounting structure as claimed in claim 6, characterized in that the stiffness coefficient of said fourth spring (20) is larger than the stiffness coefficient of the second spring (14).
8. A high temperature resistant burner nozzle mounting structure as claimed in claim 7, characterized in that the unlocking block (17) is provided with a bevel (16), the bevel (16) being arranged opposite to the burner nozzle (2).
9. The high temperature resistant burner nozzle mounting structure as claimed in claim 1, wherein two U-shaped blocks (6) are fixedly connected to the mounting tube (1), and two connecting rods (5) respectively penetrate through the U-shaped blocks (6) on the same side and are slidably connected with the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364960.8A CN112460592B (en) | 2020-11-27 | 2020-11-27 | Mounting structure of high temperature resistant combustor mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364960.8A CN112460592B (en) | 2020-11-27 | 2020-11-27 | Mounting structure of high temperature resistant combustor mouth |
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| Publication Number | Publication Date |
|---|---|
| CN112460592A true CN112460592A (en) | 2021-03-09 |
| CN112460592B CN112460592B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011364960.8A Active CN112460592B (en) | 2020-11-27 | 2020-11-27 | Mounting structure of high temperature resistant combustor mouth |
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| Country | Link |
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| CN (1) | CN112460592B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757667A (en) * | 2021-07-29 | 2021-12-07 | 北京联众华禹环保科技有限公司 | Special combustor for oil field |
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| CN209943741U (en) * | 2019-05-09 | 2020-01-14 | 江苏新澎复合材料有限公司 | High-molecular modified quick joint for composite pipe |
| CN210740389U (en) * | 2019-11-01 | 2020-06-12 | 杭州普瑟斯金属有限公司 | Combustor convenient to installation |
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| JP2001193850A (en) * | 2000-01-12 | 2001-07-17 | Kayaba Ind Co Ltd | Spool selector valve |
| CN102678700A (en) * | 2011-03-16 | 2012-09-19 | 海洋王照明科技股份有限公司 | Lifting rod and illuminating lamp using same |
| CN203820235U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator buffer |
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| CN113757667A (en) * | 2021-07-29 | 2021-12-07 | 北京联众华禹环保科技有限公司 | Special combustor for oil field |
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| CN112460592B (en) | 2023-01-24 |
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