CN211448750U - Local cooling device for high-temperature thermal damage coal face - Google Patents
Local cooling device for high-temperature thermal damage coal face Download PDFInfo
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- CN211448750U CN211448750U CN201921912795.8U CN201921912795U CN211448750U CN 211448750 U CN211448750 U CN 211448750U CN 201921912795 U CN201921912795 U CN 201921912795U CN 211448750 U CN211448750 U CN 211448750U
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- air duct
- dryer
- air
- tee joint
- port
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Abstract
The utility model provides a local heat sink for high temperature thermal damage coal face, include dryer tee bend (4) of setting on hydraulic support (1), dryer (3) of setting between dryer tee bend (4), set up to hookup and be used for forming air cooler (2) of low temperature air with dryer tee bend (4), through air cooler (2), obtain the low temperature air, through dryer (3) and dryer tee bend (4), carry hydraulic support (1) to the low temperature air on, carry out local cooling to digging the working face, no longer all cool down through the ventilation pipe, consequently, the local cooling effect to high temperature thermal damage coal face has been improved.
Description
Technical Field
The utility model relates to a local heat sink, especially a local heat sink that is used for high temperature heat evil coal face.
Background
When the mining operation is carried out on the high-temperature thermal damage coal face, the high-temperature thermal damage coal face needs to be cooled, so that the safety of operators is guaranteed, and therefore the local cooling device for the high-temperature thermal damage coal face is an important mining device.
The technical scheme of the invention is made based on the technical problems, technical features and technical effects in the technical background of the applicant.
Disclosure of Invention
The object of the utility model is a local heat sink that is used for high temperature thermal damage coal face.
In order to overcome the technical defect, the utility model aims at providing a local heat sink for high temperature thermal damage coal face has consequently improved the local cooling effect to high temperature thermal damage coal face.
In order to achieve the purpose, the utility model adopts the technical proposal that: comprises an air duct tee joint arranged on a hydraulic support, an air duct arranged between the air duct tee joints and an air cooler which is connected with the air duct tee joint and used for forming low-temperature air.
The air cooler, the air duct and the air duct tee joint are designed, low-temperature air is obtained through the air cooler, the low-temperature air is conveyed to the hydraulic support through the air duct and the air duct tee joint, the excavation working face is locally cooled, and the cooling is not performed through the ventilation pipe, so that the local cooling effect on the high-temperature heat damage coal mining working face is improved.
The utility model discloses a, according to the mode of the cooling port of integrated on hydraulic support air cooler, dryer and dryer tee bend interconnect.
The utility model discloses a, still include first annex device and first annex device sets up to hookup with the dryer tee bend, and first annex device sets up to including automatically controlled valve, infrared probe and controller.
The utility model discloses a, still include second annex device and second annex device sets up to hookup with the dryer tee bend, and second annex device sets up to including jacket and hose.
The utility model discloses a, still include third annex device and third annex device sets up to hookup with second annex device, and third annex device sets up to water storage cooling jar.
The utility model discloses a, dryer tee bend and infrared probe set up on hydraulic support, and the dryer tee bend sets up in the dryer and the dryer sets up to communicate with the air cooler, and electric control valve sets up on the dryer tee bend and be provided with the controller between electric control valve and infrared probe.
The utility model discloses a, the input oral area of air cooler sets up to hookup with the ventilation pipe and the output oral area of air cooler sets up to hookup with the dryer, and the air cooler sets up to air cooler.
The utility model discloses a, the dryer sets up to circular tubulose body and the beginning port of dryer sets up to hookup with the air cooler, and the end port of dryer sets up to hookup and be provided with the dryer tee bend in the dryer with the stop valve.
The utility model discloses a, the dryer tee bend sets up to Y font siphonozooid and wherein two port portions of dryer tee bend set up to hookup with the dryer, and dryer tee bend wherein the third port portion sets up to hookup and the dryer tee bend sets up to hookup through connecting strake and hydraulic support.
The utility model discloses a, electrically controlled valve sets up to electric butterfly valve and one of them port portion of electrically controlled valve sets up to hookup with the dryer tee bend, and electrically controlled valve's control port sets up to be connected with the controller.
The utility model discloses a, infrared probe sets up to infrared probe and infrared probe sets up to hookup with hydraulic support hoist and mount formula, and infrared probe's output port sets up to be connected with the controller.
The utility model discloses a, the controller sets up to the PLC controller and the input port of controller sets up to be connected with infrared probe, and the output port of controller sets up to be connected with electric control valve.
The utility model discloses a, hydraulic support and air cooler, dryer and dryer tee bend set up to distribute according to the mode that forms local low temperature region and hydraulic support, air cooler, dryer and dryer tee bend and automatically controlled valve, infrared probe and controller set up to distribute according to the mode of being interrupted the switching, and at least the dryer tee bend sets up in the dryer.
The utility model relates to a, be provided with the hose between jacket and dryer tee bend.
The utility model discloses a, be provided with first interface part and second interface part respectively and first interface part and second interface part set up respectively to the native font siphonozooid at the back of the clothing portion of jacket, first interface part and second interface part set up respectively to hookup with clothing portion mosaic and the outer end oral area of first interface part or second interface part sets up respectively to hookup with the hose.
The utility model discloses a, the hose sets up to the rubber tube and wherein one of them port portion of hose sets up to coupleing with the dryer tee bend, and wherein another port portion of hose sets up to coupleing with the jacket.
The utility model discloses a, be provided with cold and hot exchange pipe in the jar body of water storage cooling jar, the input oral area of the jar body of water storage cooling jar sets up to hookup with the ventilation pipe and the output oral area of the jar body of water storage cooling jar sets up to hookup with the hose, and the cold and hot exchange pipe of water storage cooling jar sets up to cold water source intercommunication and be provided with the exhaust fan in first interface part and second interface part respectively, and the power port of exhaust fan sets up to be connected with portable battery.
The technical effects of the utility model reside in that: a local ventilator is arranged 2-3 m ahead of an air cooler air outlet, cold air is led to a coal face through an air duct, an air duct tee joint is reserved every 10 m on the air duct of the coal face, an electric stop valve is arranged on the air duct tee joint and is connected with the electric stop valve through an infrared probe, when the infrared probe detects a person, an electric valve is opened, the cold air is blown out from the tee joint, a small local cooling area is formed near the three-way air outlet, a working face operator can cool the three-way air outlet, a common lithium battery of the fan is changed into an explosion-proof lithium battery, a pipeline quick socket is additionally arranged on the fan, a local fan is arranged 2-3 m ahead of a condenser, the cold air is led into the working face through the air duct, a quick plug is arranged on the working face air duct, the quick plug is 5 m away from the quick plug on the air duct, and the fan of a cooling garment can be connected through a, the cold air in the air duct is guided into the work clothes, a water storage cooling tank is designed, cold and heat exchange tubes are arranged in the cooling tank, the water storage cooling tank is connected with a fan through a guide pipe, the fan is started, and the air cooled by the water storage cooling tank is sucked into the work clothes to realize cooling.
In the technical scheme, the air cooler, the air duct and the air duct tee joint of the cooling port integrated on the hydraulic support are important technical characteristics, and have novelty, creativity and practicability in the technical field of local cooling devices for high-temperature thermal damage coal faces.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Figure 1 is a schematic view of one of the first embodiments of the present invention,
FIG. 2 is a schematic view showing the connection relationship between the hydraulic support 1, the air duct tee 4, the electrically controlled valve 5, the infrared probe 6 and the controller 10 according to one of the first embodiments of the present invention,
figure 3 is a schematic view of a second embodiment of the present invention,
figure 4 is a schematic structural view of the upper garment 7 according to the second embodiment of the present invention,
figure 5 is a schematic view of a third embodiment of the present invention,
the device comprises a hydraulic support-1, an air cooler-2, an air duct-3, an air duct tee-4, an electric control valve-5, an infrared probe-6, a controller-10, an upper garment-7, a hose-8, a garment part-71, a first interface part-72, a second interface part-73 and a water storage cooling tank-9.
Detailed Description
Terms such as "having," "including," and "comprising," as used herein with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and unless otherwise specified, the equipment and materials used in the following examples are commercially available, and if the processing conditions are not specified, please refer to the purchased product specification or follow the conventional method in the art.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is one of the first embodiment of the utility model, combine the figure to specifically explain this embodiment, include air cooler 2, dryer 3, dryer tee bend 4, automatically controlled valve 5, infrared probe 6 and controller 10 and dryer tee bend 4 and infrared probe 6 set up on hydraulic support 1, dryer tee bend 4 sets up in dryer 3 and dryer 3 sets up to communicate with air cooler 2, automatically controlled valve 5 sets up on dryer tee bend 4 and is provided with controller 10 between automatically controlled valve 5 and infrared probe 6.
In the present embodiment, the inlet port of the air cooler 2 is provided to be coupled to the ventilation duct and the outlet port of the air cooler 2 is provided to be coupled to the air duct 3, and the air cooler 2 is provided to be an air cooler.
Through air cooler 2, formed the support tie point to dryer 3, by air cooler 2, realized being connected with dryer 3, its technical purpose lies in: used for inputting low-temperature air into the air duct 3.
In the present embodiment, the air duct 3 is provided as a circular tubular body and a start port of the air duct 3 is provided to be coupled with the air cooler 2, a last port of the air duct 3 is provided to be coupled with a shut-off valve and an air duct tee 4 is provided in the air duct 3.
Through dryer 3, formed the support tie point to air cooler 2, by dryer 3, realized being connected with air cooler 2, realized being connected with dryer tee bend 4, its technical aim at: for conveying low temperature air.
In this embodiment, the air duct tee 4 is set to be a Y-shaped tubular body and two of the port portions of the air duct tee 4 are set to be connected with the air duct 3, the third of the port portions of the air duct tee 4 is set to be connected with the electric control valve 5 and the air duct tee 4 is set to be connected with the hydraulic bracket 1 through the connecting straps.
Through dryer tee bend 4, formed the support tie point to dryer 3 and automatically controlled valve 5, by dryer tee bend 4, realized being connected with dryer 3, realized being connected with automatically controlled valve 5, its technical aim at: for cooling in the area of the hydraulic support 1.
In the present embodiment, the electrically controlled valve 5 is configured as an electric butterfly valve and one of the port portions of the electrically controlled valve 5 is configured to be coupled with the air duct tee 4, and the control port of the electrically controlled valve 5 is configured to be connected with the controller 10.
Through automatically controlled valve 5, formed the support tie point to dryer tee bend 4 and controller 10, by automatically controlled valve 5, realized being connected with dryer tee bend 4, realized being connected with controller 10, its technical aim at: used for controlling the opening and closing of the air duct tee joint 4.
In the present embodiment, the infrared probe 6 is configured as an infrared probe and the infrared probe 6 is configured to be connected with the hydraulic bracket 1 in a hoisting manner, and an output port of the infrared probe 6 is configured to be connected with the controller 10.
Through infrared probe 6, formed the support tie point to controller 10, by infrared probe 6, realized being connected with controller 10, its technical aim at: for picking up operator signals in the area of the hydraulic support 1.
In this embodiment, the controller 10 is configured as a PLC controller and the input port of the controller 10 is configured to be connected to the infrared probe 6, and the output port of the controller 10 is configured to be connected to the electrically controlled valve 5.
Through controller 10, formed the support tie point to automatically controlled valve 5 and infrared probe 6, by controller 10, realized being connected with automatically controlled valve 5, realized being connected with infrared probe 6, its technical aim at: used for inputting control signals to the electric control valve 5 based on the signals of the infrared probe 6.
In this embodiment, the hydraulic support 1, the air cooler 2, the air duct 3 and the air duct tee joint 4 are arranged to be distributed according to a mode of forming a local low-temperature region, the hydraulic support 1, the air cooler 2, the air duct 3, the air duct tee joint 4, the electric control valve 5, the infrared probe 6 and the controller 10 are arranged to be distributed according to a mode of being opened and closed discontinuously, and at least the air duct tee joint 4 is arranged in the air duct 3.
The ventilation pipe is communicated with the air cooler 2, after the air cooler 2 is started, the air cooler 2 outputs low-temperature air, the low-temperature air is conveyed in the air duct 3, when an operator is positioned on a mining working face of the hydraulic support 1, the infrared probe 6 senses a position signal of the operator, the infrared probe inputs a signal to the controller 10, the controller 10 inputs a signal to the electric control valve 5, the electric control valve 5 is in an open state, the air duct tee joint 4 sprays the low-temperature air, the temperature is reduced on the mining working face of the hydraulic support 1, when the operator is not positioned on the mining working face of the hydraulic support 1, the infrared probe 6 does not input a signal to the controller 10, the controller 10 does not input a signal to the electric control valve 5, and the electric control valve 5 is in a closed state.
Fig. 3 is a second embodiment of the present invention, which is specifically described with reference to the accompanying drawings, further comprising an upper garment 7 and a hose 8, and the hose 8 is disposed between the upper garment 7 and the air duct tee 4.
In the present embodiment, the first and second connecting ports 72 and 73 are respectively provided at the back of the clothes part 71 of the upper garment 7 and the first and second connecting ports 72 and 73 are respectively provided as a tubular body in a shape of a letter, the first and second connecting ports 72 and 73 are respectively provided to be coupled with the clothes part 71 in a mosaic manner and the outer end mouth part of the first connecting port 72 or the outer end mouth part of the second connecting port 73 is respectively provided to be coupled with the hose.
The jacket 7 forms a supporting connection point for the hose 8, the first interface part 72 and the second interface part 73 realize connection with the hose 8, the clothes part 71 realizes wearing for an operator, and the technical aim is as follows: used for cooling the body surface of an operator.
In the present embodiment, the hose 8 is provided as a rubber tube and one of the port portions of the hose 8 is provided to be coupled to the air duct tee 4, and the other port portion of the hose 8 is provided to be coupled to the upper garment 7.
Through hose 8, formed the support tie point to dryer tee bend 4 and jacket 7, by hose 8, realized being connected with dryer tee bend 4, realized being connected with jacket 7, its technical aim at: for feeding low-temperature air into the jacket 7.
When an operator works on the mining working face of the hydraulic support 1, after the operator wears the clothes part 71, low-temperature air of the air duct tee joint 4 is injected into the clothes part 71 through the hose 8 and the first connector part 72 or the second connector part 73, and the body surface of the operator is cooled.
Fig. 5 is the third embodiment of the present invention, specifically explain this embodiment in combination with the drawing, still include water storage cooling tank 9 and be provided with cold and hot exchange tube in the jar body of water storage cooling tank 9, the input oral area of the jar body of water storage cooling tank 9 sets up to be linked with the ventilation pipe and the output oral area of the jar body of water storage cooling tank 9 sets up to be linked with hose 8, the cold and hot exchange tube of water storage cooling tank 9 sets up to the cold water source intercommunication and be provided with the exhaust fan in first interface part 72 and second interface part 73 respectively, the power port of exhaust fan sets up to be connected with portable battery.
Through water storage cooling tank 9, formed the support tie point to hose 8, by water storage cooling tank 9, realized being connected with hose 8, its technical aim at: for forming low temperature air to be supplied into the jacket 7.
The air in the water storage cooling tank 9 is cooled by the cold and hot exchange pipe through the cold water source, low-temperature air is formed in the tank body of the water storage cooling tank 9, the low-temperature air is injected into the clothes part 71 through the exhaust fans in the first interface part 72 and the second interface part 73, and the low-temperature air in a positive pressure state is formed in the clothes part 71.
The utility model discloses a second embodiment, according to the mode of the cooling port of integrated on hydraulic support 1 air cooler 2, dryer 3 and dryer tee bend 4 hookups each other.
In the embodiment, a first accessory device is further included and is configured to be connected with the air duct tee joint 4, and the first accessory device is configured to include an electric control valve 5, an infrared probe 6 and a controller 10.
In this embodiment, a second attachment device is further included and is configured to couple with the air duct tee 4, and the second attachment device is configured to include a jacket 7 and a hose 8.
In this embodiment, a third attachment device is included and is configured to couple with the second attachment device, and is configured as a chilled water storage tank 9.
A second embodiment of the present invention is based on the first embodiment,
the utility model has the characteristics of down:
1. due to the design of the air cooler 2, the air duct 3 and the air duct tee joint 4, low-temperature air is obtained through the air cooler 2, the low-temperature air is conveyed to the hydraulic support 1 through the air duct 3 and the air duct tee joint 4, the excavation working face is locally cooled, and the temperature is not reduced through the ventilation pipe any more, so that the local cooling effect on the high-temperature heat damage coal mining working face is improved.
2. Due to the design of the electric control valve 5, the infrared probe 6 and the controller 10, electric signal control is realized.
3. Due to the design of the upper garment 7 and the hose 8, the cooling of a single operator is realized.
4. Due to the design of the water storage cooling tank 9, an independent cooling unit is realized.
5. Owing to designed the utility model discloses a technical characteristic, in technical characteristic's the effect alone and mutual set, through experimental demonstration, the utility model discloses an each item performance index is 1.7 times at least for current each item performance index, has fine market value through the aassessment.
Still other technical features connected with the air cooler 2, the air duct 3 and the air duct tee 4 of the cooling port integrated on the hydraulic bracket 1 are all one of the embodiments of the present invention, and the technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent implementation rules and examination guidelines, all possible combinations of the technical features of the above-mentioned embodiments are not described again.
Therefore in the local heat sink technical field who is used for high temperature thermal damage coal face, include the dryer tee bend 4 of setting on hydraulic support 1, set up dryer 3 between dryer tee bend 4, set up to be linked and be used for forming the air cooler 2's of low temperature air technical content with dryer tee bend 4 all is in the protection scope of the utility model.
Claims (10)
1. A local heat sink for high temperature thermal damage coal face, characterized by: comprises an air duct tee joint (4) arranged on a hydraulic support (1), an air duct (3) arranged between the air duct tee joints (4), and an air cooler (2) which is arranged to be connected with the air duct tee joint (4) and is used for forming low-temperature air.
2. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 1, characterized in that: the air cooler (2), the air cylinder (3) and the air cylinder tee joint (4) are connected with each other in a cooling port mode integrated on the hydraulic support (1).
3. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 1, characterized in that: also comprises a first accessory device which is connected with the air duct tee joint (4), the first accessory device comprises an electric control valve (5), an infrared probe (6) and a controller (10),
or a second accessory device is also included and is arranged to be connected with the air duct tee joint (4), the second accessory device is arranged to include an upper garment (7) and a hose (8),
or a third accessory device is further included and is arranged to be connected with the second accessory device, and the third accessory device is arranged to be a water storage cooling tank (9).
4. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 3, characterized in that: dryer tee bend (4) and infrared probe (6) set up on hydraulic support (1), and dryer tee bend (4) set up in dryer (3) and dryer (3) set up to communicate with air cooler (2), and automatically controlled valve (5) set up on dryer tee bend (4) and be provided with controller (10) between automatically controlled valve (5) and infrared probe (6).
5. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 4, characterized in that: the inlet of the air cooler (2) is connected with the ventilating pipe, the outlet of the air cooler (2) is connected with the wind tube (3), the air cooler (2) is an air cooler,
or the wind barrel (3) is set to be a circular tubular body, the starting port of the wind barrel (3) is set to be connected with the air cooler (2), the tail port of the wind barrel (3) is set to be connected with the stop valve, a wind barrel tee joint (4) is arranged in the wind barrel (3),
or the air duct tee joint (4) is arranged into a Y-shaped tubular body, two port parts of the air duct tee joint (4) are connected with the air duct (3), the third port part of the air duct tee joint (4) is connected with the electric control valve (5), and the air duct tee joint (4) is connected with the hydraulic support (1) through the connecting hoop strip.
6. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 4, characterized in that: the electric control valve (5) is arranged as an electric butterfly valve, one port part of the electric control valve (5) is arranged to be connected with the air duct tee joint (4), the control port of the electric control valve (5) is arranged to be connected with the controller (10),
or the infrared probe (6) is arranged as an infrared probe, the infrared probe (6) is arranged to be connected with the hydraulic bracket (1) in a hoisting way, the output port of the infrared probe (6) is arranged to be connected with the controller (10),
or the controller (10) is set to be a PLC controller, an input port of the controller (10) is set to be connected with the infrared probe (6), and an output port of the controller (10) is set to be connected with the electric control valve (5).
7. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 4, characterized in that: a hose (8) is arranged between the jacket (7) and the air duct tee joint (4).
8. The local cooling device for the high-temperature thermally damaged coal mining working face according to claim 7, characterized in that: a first interface part (72) and a second interface part (73) are respectively arranged at the back of a clothes part (71) of the coat (7), the first interface part (72) and the second interface part (73) are respectively arranged to be soil-shaped tubular bodies, the first interface part (72) and the second interface part (73) are respectively arranged to be in embedded connection with the clothes part (71), the outer port part of the first interface part (72) or the outer port part of the second interface part (73) is respectively arranged to be connected with the hose (8),
or the hose (8) is set to be a rubber pipe, one end opening part of the hose (8) is set to be connected with the air duct tee joint (4), and the other end opening part of the hose (8) is set to be connected with the coat (7).
9. The local cooling device for the high temperature thermally damaged coal mining working face according to claim 8, characterized in that: a cold and heat exchange pipe is arranged in a tank body of the water storage cooling tank (9), an input end opening portion of the tank body of the water storage cooling tank (9) is connected with the ventilation pipe, an output end opening portion of the tank body of the water storage cooling tank (9) is connected with the hose (8), the cold and heat exchange pipe of the water storage cooling tank (9) is communicated with a cold water source, exhaust fans are arranged in the first interface portion (72) and the second interface portion (73), and a power supply port of each exhaust fan is connected with a portable battery.
10. The localized cooling device for a high temperature thermally damaged coal face as claimed in any one of claims 1 to 9, wherein: the hydraulic support (1) and the air cooler (2), the air duct (3) and the air duct tee joint (4) are arranged to be distributed according to a mode of forming a local low-temperature region, the hydraulic support (1), the air cooler (2), the air duct (3), the air duct tee joint (4), the electric control valve (5), the infrared probe (6) and the controller (10) are arranged to be distributed according to a mode of being interrupted to be opened and closed, and at least the air duct tee joint (4) is arranged in the air duct (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921912795.8U CN211448750U (en) | 2019-11-07 | 2019-11-07 | Local cooling device for high-temperature thermal damage coal face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921912795.8U CN211448750U (en) | 2019-11-07 | 2019-11-07 | Local cooling device for high-temperature thermal damage coal face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448750U true CN211448750U (en) | 2020-09-08 |
Family
ID=72313808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921912795.8U Expired - Fee Related CN211448750U (en) | 2019-11-07 | 2019-11-07 | Local cooling device for high-temperature thermal damage coal face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211448750U (en) |
-
2019
- 2019-11-07 CN CN201921912795.8U patent/CN211448750U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200908 Termination date: 20211107 |