CN215996006U - Coal injection pressure discharge pipeline filter cylinder switching device - Google Patents
Coal injection pressure discharge pipeline filter cylinder switching device Download PDFInfo
- Publication number
- CN215996006U CN215996006U CN202120354512.3U CN202120354512U CN215996006U CN 215996006 U CN215996006 U CN 215996006U CN 202120354512 U CN202120354512 U CN 202120354512U CN 215996006 U CN215996006 U CN 215996006U
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- plate body
- plate
- pressure discharge
- filter cartridge
- filter cylinder
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- 239000003245 coal Substances 0.000 title claims abstract description 36
- 238000002347 injection Methods 0.000 title claims abstract description 31
- 239000007924 injection Substances 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
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Abstract
The utility model provides a coal injection pressure discharge pipeline filter cylinder switching device, which belongs to the technical field of blast furnace coal injection and comprises a frame body, a rotating shaft and a metal compensator. In the coal injection pressure discharge pipeline filter cylinder switching device provided by the utility model, when the filter effect of the filter cylinder is poor or the filter cylinder is damaged and needs to be replaced, the second plate body is pushed to horizontally move towards the direction of the metal compensator, the metal compensator is compressed by the second plate body, a gap is formed between the filter cylinder and the second plate body, then the rotating shaft is rotated, the rotating shaft drives the filter cylinders connected with the mounting bracket to swing, so that the filter cylinder needing to be replaced swings out from the position between the first plate body and the second plate body, a new filter cylinder swings in and is just aligned with the pressure discharge pipeline, then the second plate body is pushed to horizontally move towards the direction of the filter cylinder, the filter cylinder is clamped by the second plate body and the first plate body, the filter cylinder replacement operation is quickly completed, manual alignment operation for replacing the filter cylinder is not needed, and the filter cylinder replacement efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of blast furnace coal injection, and particularly relates to a coal injection pressure discharge pipeline filter cylinder switching device.
Background
At present, increasing the coal injection ratio is one of important means for reducing the cost of blast furnace ironmaking, and the injection with a large coal injection ratio is also a trend. Before normal production can inversion canning, the buggy needs to be discharged to the ordinary pressure through pressure discharge pipeline with jar internal pressure, high-pressure gas medium carries the buggy particulate matter and passes through pressure discharge pipeline at a high speed, cause wearing and tearing to the pipeline, under normal conditions, the injection jar pressure is 0.8-0.9MPa, and sack pressure is-0.05 MPa, and the pressure differential is 0.85-0.95MPa, when opening pressure discharge valve, the remaining buggy in the jar moves with the gas-solid mixture that nitrogen gas formed at a high speed in pressure discharge pipeline, cause wearing and tearing to pressure discharge pipeline, especially the wearing and tearing to pipeline corner are most serious, thereby cause the frequent damage of pipeline corner, influence the steady operation of jetting system.
The pressure discharge pipeline in the injection system is abraded due to scouring of high-speed pulverized coal, the corner of the pressure discharge pipeline can be damaged to cause a coal leakage phenomenon, the corner of the pressure discharge pipeline needs repair welding in about 1 month on average through statistics, the repair welding pipeline needs the system to be shut down for 3 hours at ordinary times, the coal injection quantity of the blast furnace is seriously influenced, pulverized coal leakage can influence the environment, great potential safety hazards can be caused after powder accumulation, explosive dust environment can be formed even when the pulverized coal leakage is serious, and the stability of the pulverized coal injection system is seriously influenced.
Therefore, a filter device is generally installed on the pressure discharge pipe, the high-pressure gas intercepts the pulverized coal particles in the high-pressure gas through the filter device, and the gas is discharged from the pressure discharge pipe. Because the condition that the filter effect is poor or damage can appear in long-time use of filter equipment, so need often change filter equipment, but filter equipment needs workman manual change, and the change process is wasted time and energy, change inefficiency, influences holistic production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a filter cylinder switching device for a coal injection pressure relief pipeline, and aims to solve the problems that time and labor are wasted and the replacement efficiency is low when a filter device is replaced.
In order to achieve the purpose, the utility model adopts the technical scheme that: provided is a coal injection pressure discharge pipeline filter cartridge switching device, comprising:
the filter cartridge comprises a frame body, a first filter cartridge body and a second filter cartridge body, wherein the frame body is provided with a first plate body and a second plate body which are respectively sleeved on a pressure discharge pipeline;
the rotating shaft is rotatably connected between the first plate body and the second plate body and is positioned outside the pressure discharge pipeline; the rotating shaft is connected with a mounting bracket, and the mounting bracket is used for mounting a plurality of filter cartridges at intervals along the circumferential direction of the rotating shaft; and
the metal compensator is sleeved on the pressure discharge pipeline, one end of the metal compensator is abutted against the plate surface of the second plate body far away from the first plate body, and the other end of the metal compensator is fixedly arranged on the pressure discharge pipeline;
the first plate body is fixedly connected with the pressure discharge pipeline, and the second plate body is connected with the pressure discharge pipeline in a sliding manner; when the second plate moves toward the metal compensator to press the metal compensator, the rotary shaft rotates, so that the plurality of filter cartridges are switched when the metal compensator is compressed.
As another embodiment of this application, the support body still has fixed cover to be established third plate body on the pressure discharge pipeline, metal compensator's stiff end with third plate body butt.
As another embodiment of the present application, the third plate body is horizontally connected with a plurality of guide pillars, the second plate body and the first plate body are respectively provided with a plurality of guide sleeves respectively matched with the plurality of guide pillars, and the plurality of guide pillars respectively penetrate through the first plate body and the second plate body.
As another embodiment of the present application, the rotating shaft is further connected with a power assembly for driving the rotating shaft to rotate; the power assembly includes:
the motor is positioned on one side of the first plate body, which is far away from the second plate body, and one end of the output shaft extends into the space between the first plate body and the second plate body;
the second gear is fixedly connected with the extending-in end of the output shaft of the motor; and
and the first gear is sleeved on the rotating shaft and is meshed with the second gear.
As another embodiment of this application, the second plate body is connected with and is used for driving its gliding lead screw, the one end of lead screw is rotated and is connected on the first plate body, and the other end passes and establishes screw hole on the second plate body, and the lead screw still is connected with and is used for driving its pivoted power component.
As another embodiment of the present application, the number of the filter cartridges is 3.
As another embodiment of the present application, the pipe orifice size of the metal compensator is equal to or smaller than the pipe orifice size of the pressure discharge pipe.
As another embodiment of the present application, sealing rings are disposed between the first plate and the filter cartridge, and between the second plate and the filter cartridge.
The filter cylinder switching device for the coal injection pressure discharge pipeline provided by the utility model has the beneficial effects that: compared with the prior art, in the coal injection pressure discharge pipeline filter cylinder switching device, when the filter cylinder is poor in filtering effect or damaged and needs to be replaced, the second plate body is pushed to horizontally move towards the metal compensator, the metal compensator is compressed by the second plate body, a gap is formed between the filter cylinder and the second plate body, then the rotating shaft is rotated, the rotating shaft drives the filter cylinders connected with the mounting support to swing, so that the filter cylinder needing to be replaced swings out from the position between the first plate body and the second plate body, a new filter cylinder swings in and is just aligned with the pressure discharge pipeline, then the second plate body is pushed to horizontally move towards the direction of the filter cylinder, the filter cylinder is clamped by the second plate body and the first plate body, the filter cylinder replacing operation is rapidly completed, manual alignment operation of workers is not needed, and the filter cylinder replacing efficiency is greatly improved. The filter cartridge with poor filtering effect or damage can be detached from the mounting bracket of the rotating shaft for cleaning or repairing after being replaced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a filter cartridge switching device for a coal injection pressure relief pipeline according to an embodiment of the present invention;
fig. 2 is a schematic perspective view (including a power assembly) of a filter cartridge switching device for a coal injection pressure relief pipeline according to an embodiment of the present invention;
fig. 3 is a schematic front view of a filter cartridge switching device for a coal injection pressure relief pipeline according to an embodiment of the present invention.
In the figure: 100. a frame body; 110. a first plate body; 120. a second plate body; 121. a threaded hole; 130. a third plate body; 131. a guide post; 140. a guide sleeve; 200. a rotating shaft; 210. mounting a bracket; 220. a filter cartridge; 230. a power assembly; 231. a first gear; 232. a second gear; 233. a motor; 300. a metal compensator; 400. a lead screw; 410. a power element; 500. a seal ring; 600. a controller; 700. and (4) a pressure discharge pipeline.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 to 3, a description will now be given of a coal injection pressure discharge pipe cartridge switching device according to the present invention. The coal injection pressure discharge pipeline filter cartridge switching device comprises a frame body 100, a rotating shaft 200 and a metal compensator 300.
The frame body 100 has a first plate body 110 and a second plate body 120 respectively sleeved on the pressure discharge pipeline 700, and a filter cartridge 220 is placed between the first plate body 110 and the second plate body 120; the rotating shaft 200 is rotatably connected between the first plate 110 and the second plate 120 and is located outside the pressure discharge pipe 700; the rotating shaft 200 is connected with a mounting bracket 210, and the mounting bracket 210 is used for mounting a plurality of filter cartridges 220 at intervals along the circumferential direction of the rotating shaft 200; the metal compensator 300 is configured to be sleeved on the pressure discharge pipeline 700, and one end of the metal compensator abuts against the plate surface of the second plate 120 far away from the first plate 110, and the other end of the metal compensator is fixedly disposed on the pressure discharge pipeline 700; the first plate body 110 is fixedly connected with the pressure discharge pipeline 700, and the second plate body 120 is slidably connected with the pressure discharge pipeline 700; when the second plate 120 moves toward the metal compensator 300 to press the metal compensator 300, the rotation shaft 200 rotates, so that the plurality of filter cartridges 220 are switched when the metal compensator 300 is compressed.
Compared with the prior art, in the coal injection pressure discharge pipeline filter cartridge switching device provided by the utility model, when the filtering effect of the filter cartridge 220 is poor or the filter cartridge 220 is damaged and needs to be replaced, the second plate body 120 is pushed to horizontally move towards the direction of the metal compensator 300, the second plate body 120 compresses the metal compensator 300 to form a gap between the filter cartridge 220 and the second plate body 120, then the rotating shaft 200 is rotated, the rotating shaft 200 drives the filter cartridges 220 connected with the mounting bracket 210 to swing, so that the filter cartridge 220 needing to be replaced swings out from the position between the first plate body 110 and the second plate body 120, a new filter cartridge 220 swings in and is just aligned with the pressure discharge pipeline 700, then the second plate body 120 is pushed to horizontally move towards the direction of the filter cartridge 220, so that the filter cartridge 220 is clamped by the second plate body 120 and the first plate body 110, and the operation of the filter cartridge 220 is rapidly completed, the filter cartridge 220 is replaced without manual alignment by a worker, which greatly improves the efficiency of replacing the filter cartridge 220. The filter cartridge 220 having poor filtering performance or damaged may be removed from the mounting bracket 210 of the rotary shaft 200 for cleaning or repair after being replaced.
Specifically, not shown in the figure, the second plate 120 may be connected to a transmission member for driving the second plate to slide, the transmission member may be a linear guide rail and is connected to the electric slider in a matching manner, and the electric slider is connected to the second plate 120. The power element 410 drives the electric slider to move horizontally along the linear guide, and the electric slider drives the second plate 120 to move horizontally, so as to compress or release the metal compensator 300.
Referring to fig. 1 to 3, the frame body 100 further has a third plate 130 fixedly secured to the pressure discharge pipe 700, a fixed end of the metal compensator 300 abuts against the third plate 130, and the metal compensator 300 is fixedly connected to the pressure discharge pipe 700 through the third plate 130.
The third plate 130 may be further fixedly connected between the metal compensator 300 and the pressure relief pipe 700, and the rotating shaft 200 passes through the second plate 120 to be rotatably connected with the third plate 130, and the third plate 130 plays a role of supporting the rotating shaft 200, so that the rotating shaft 200 is more stable in the rotating process, and the position accuracy of the filter cartridge 220 during replacement is ensured.
In addition, when the power element 410 drives the second plate 120 to move horizontally, the second plate 120 also moves along the rotating shaft 200, and the rotating shaft 200 plays a guiding role to prevent the metal compensator 300 from deflecting when being compressed.
Referring to fig. 1 to 3, the third plate 130 is horizontally connected with a plurality of guide posts 131, the second plate 120 and the first plate 110 are respectively provided with a plurality of guide sleeves 140 respectively matched with the plurality of guide posts 131, and the plurality of guide posts 131 respectively pass through the corresponding plurality of guide sleeves 140 on the first plate 110 and the second plate 120.
When the second plate 120 is pushed to move horizontally and the second plate 120 compresses or releases the metal compensator 300, the plurality of guide posts 131 on the third plate 130 respectively pass through the corresponding plurality of guide sleeves 140 on the second plate 120 and the first plate 110, the plurality of guide sleeves 140 on the second plate 120 move horizontally along the corresponding plurality of guide posts 131, and the guide posts 131 and the guide sleeves 140 are precisely matched with each other, so that the stable horizontal movement of the second plate 120 can be further ensured, and the situation that the metal compensator 300 deflects when being compressed and the precision of the switching filter cartridge 220 is influenced is avoided.
In addition, the guide posts 131 respectively pass through the guide sleeves 140 corresponding to the first plate 110, so as to support the device.
Specifically, the guide posts 131 are disposed at positions that do not interfere with the oscillation of the plurality of filter cartridges 220.
Referring to fig. 2, the rotating shaft 200 is further connected to a power assembly 230 for driving the rotating shaft to rotate; the power assembly 230 includes a motor 233, a second gear 232, and a first gear 231.
The motor 233 is located on one side of the first plate 110 away from the second plate 120, and one end of the output shaft extends between the first plate 110 and the second plate 120; the second gear 232 is fixedly connected with the extending-in end of the output shaft of the motor 233; the first gear 231 is fitted over the rotary shaft 200 and engaged with the second gear 232.
When the filter cartridge 220 is switched, the motor 233 drives the second gear 232 to rotate, the second gear 232 drives the first gear 231 to rotate, and the first gear 231 is sleeved on the rotating shaft 200, so the first gear 231 drives the rotating shaft 200 to rotate, so that the filter cartridges 220 on the mounting bracket 210 connected with the rotating shaft 200 swing around the rotating shaft 200, the filter cartridge 220 to be replaced swings out from between the first plate body 110 and the second plate body 120, and a new filter cartridge 220 swings in and is just aligned with the pressure discharge pipeline 700, thereby realizing the rapid switching of the filter cartridge 220. In addition, the reliability of the transmission is high by the gear engagement, so that the filter cartridge 220 can be switched smoothly.
Referring to fig. 1 and 3, the second plate 120 is connected to a screw 400 for driving the second plate to slide, one end of the screw 400 is rotatably connected to the first plate 110, the other end of the screw 400 passes through a threaded hole 121 formed in the second plate 120, and the screw 400 is further connected to a power element 410 for driving the screw to rotate.
Two ends of the screw 400 are polished rods and are respectively connected with the first plate 110 and the second plate 120 in a rotating manner; the screw rod 400 is connected with the threaded hole 121 formed on the second plate 120 in a matching manner. When the filter cartridge 220 needs to be switched, the power element 410 drives the lead screw 400 to rotate, the lead screw 400 drives the second plate 120 to horizontally move towards the direction of the metal compensator 300, so that a gap is formed between the second plate 120 and the filter cartridge 220 to be replaced, then the power assembly 230 drives the rotating shaft 200 to rotate, the filter cartridges 220 connected to the rotating shaft 200 swing around the rotating shaft 200, so that the filter cartridge 220 to be replaced swings out from the position between the first plate 110 and the second plate 120, a new filter cartridge 220 swings in and is just aligned with the pressure discharge pipeline 700, then the power element 410 drives the lead screw 400 to reversely rotate, the lead screw 400 drives the second plate 120 to horizontally move towards the direction of the filter cartridge 220, so that the second plate 120 extrudes the filter cartridge 220, and the operation of switching the filter cartridge 220 is quickly completed. The screw 400 is matched with the threaded hole 121, so that the horizontal movement of the second plate 120 is more stable, the stability of the utility model is improved, and the problem that the installation accuracy of the filter cartridge 220 is influenced by the shaking of the device when the filter cartridge 220 is switched is avoided.
Specifically, the power element 410 may be a motor assembly.
Referring to fig. 1, the number of the filter cartridges 220 is preferably 3, and the filter cartridges are detachably disposed at equal intervals along the circumferential direction of the rotation shaft 200, wherein 1 filter cartridge 220 of the 3 filter cartridges 220 is an in-use filter cartridge 220, and the other 2 filter cartridges 220 are spare filter cartridges 220, when the in-use filter cartridge 220 needs to be replaced, the in-use filter cartridge 220 is swung out from between the pressure discharge pipes 700 by rotating the rotation shaft 200 by 120 °, and 1 spare filter cartridge 220 is swung in, so that the operation of switching the filter cartridges 220 is rapidly and accurately performed.
Referring to fig. 1, the pipe hole size of the metal compensator 300 is equal to or smaller than the pipe hole size of the pressure discharge pipe 700.
The gas and the pulverized coal in the pressure discharge pipeline 700 pass through the filter cartridge 220, the pulverized coal is intercepted in the filter cartridge 220 by the filter cartridge 220, the gas enters the pipe hole of the metal compensator 300 from the filter cartridge 220 and then enters the pressure discharge pipeline 700, the size of the pipe hole of the metal compensator 300 is equal to or smaller than the size of the pipe orifice of the pressure discharge pipeline 700, the tightness between the metal compensator 300 and the filter cartridge 220, and the tightness between the metal compensator 300 and the pressure discharge pipeline 700 can be ensured, and the gas leakage is prevented.
Referring to fig. 1 and 3, sealing rings 500 are disposed between the first plate 110 and the filter cartridge 220, and between the second plate 120 and the filter cartridge 220.
The sealing ring 500 is disposed between the first plate 110 and the filter cartridge 220 to ensure the sealing property between the first plate 110 and the filter cartridge 220; the sealing ring 500 is arranged between the second plate body 120 and the filter cartridge 220, so that the tightness between the second plate body 120 and the filter cartridge 220 can be ensured, gas and pulverized coal leakage can be effectively prevented, and environmental pollution is avoided.
Referring to fig. 1 to 3, the power assembly 230 and the power element 410 are connected to a controller 600.
The controller 600 controls the power assembly 230 to control the rotation amount of the rotating shaft 200, and further controls the swinging amount of the plurality of filter cartridges 220 around the rotating shaft 200, so that the filter cartridge 220 to be replaced swings out from between the first plate body 110 and the second plate body 120, and a new filter cartridge 220 swings in and is aligned with the pressure discharge pipe 700; the controller 600 may control the power element 410, so as to control the displacement of the screw 400 driving the second plate 120 to move, ensure that the second plate 120 can release or compress the filter cartridge 220, and further ensure the accuracy of installing the filter cartridge 220 in the switching process of the filter cartridge 220. The controller 600 may increase the automation of the apparatus and allow for more precise switching of the filter cartridge 220.
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 utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A coal injection pressure discharge pipeline filter cylinder switching device is characterized by comprising:
the filter cartridge comprises a frame body, a first filter cartridge body and a second filter cartridge body, wherein the frame body is provided with a first plate body and a second plate body which are respectively sleeved on a pressure discharge pipeline;
the rotating shaft is rotatably connected between the first plate body and the second plate body and is positioned outside the pressure discharge pipeline; the rotating shaft is connected with a mounting bracket, and the mounting bracket is used for mounting a plurality of filter cartridges at intervals along the circumferential direction of the rotating shaft; and
the metal compensator is sleeved on the pressure discharge pipeline, one end of the metal compensator is abutted against the plate surface of the second plate body far away from the first plate body, and the other end of the metal compensator is fixedly arranged on the pressure discharge pipeline;
the first plate body is fixedly connected with the pressure discharge pipeline, and the second plate body is connected with the pressure discharge pipeline in a sliding manner; when the second plate moves toward the metal compensator to press the metal compensator, the rotary shaft rotates, so that the plurality of filter cartridges are switched when the metal compensator is compressed.
2. The coal injection pressure discharge pipe cartridge switching apparatus as claimed in claim 1, wherein said frame body further comprises a third plate fixedly secured to said pressure discharge pipe, and a fixed end of said metal compensator abuts against said third plate.
3. The device as claimed in claim 2, wherein a plurality of guide posts are horizontally connected to the third plate, a plurality of guide sleeves respectively matching with the plurality of guide posts are respectively disposed on the second plate and the first plate, and the plurality of guide posts respectively pass through the corresponding plurality of guide sleeves on the first plate and the second plate.
4. The coal injection pressure relief pipeline filter cartridge switching device of claim 1, wherein a power assembly for driving the rotation of the rotating shaft is further connected to the rotating shaft; the power assembly includes:
the motor is positioned on one side of the first plate body, which is far away from the second plate body, and one end of the output shaft extends into the space between the first plate body and the second plate body;
the second gear is fixedly connected with the extending-in end of the output shaft of the motor; and
and the first gear is sleeved on the rotating shaft and is meshed with the second gear.
5. The coal injection pressure relief pipeline filter cartridge switching device according to claim 1, wherein a screw rod for driving the second plate body to slide is connected to the second plate body, one end of the screw rod is rotatably connected to the first plate body, the other end of the screw rod passes through a threaded hole formed in the second plate body, and the screw rod is further connected to a power element for driving the screw rod to rotate.
6. The coal injection pressure relief pipeline cartridge switching device of claim 1, wherein the number of said cartridges is 3.
7. The coal injection discharge pressure pipe filter cartridge switching apparatus of claim 1, wherein the orifice size of said metal compensator is equal to or smaller than the orifice size of said discharge pressure pipe.
8. The coal injection pressure relief pipeline filter cartridge switching device of claim 1, wherein sealing rings are disposed between the first plate and the filter cartridge and between the second plate and the filter cartridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354512.3U CN215996006U (en) | 2021-02-08 | 2021-02-08 | Coal injection pressure discharge pipeline filter cylinder switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354512.3U CN215996006U (en) | 2021-02-08 | 2021-02-08 | Coal injection pressure discharge pipeline filter cylinder switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215996006U true CN215996006U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120354512.3U Expired - Fee Related CN215996006U (en) | 2021-02-08 | 2021-02-08 | Coal injection pressure discharge pipeline filter cylinder switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215996006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116291294A (en) * | 2023-05-23 | 2023-06-23 | 大庆金海达石油科技有限公司 | Blowout prevention switching device for oil extraction wellhead |
-
2021
- 2021-02-08 CN CN202120354512.3U patent/CN215996006U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116291294A (en) * | 2023-05-23 | 2023-06-23 | 大庆金海达石油科技有限公司 | Blowout prevention switching device for oil extraction wellhead |
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Granted publication date: 20220311 |