CN216950783U - Drilling machine air compression system and mining machine - Google Patents

Drilling machine air compression system and mining machine Download PDF

Info

Publication number
CN216950783U
CN216950783U CN202220818058.7U CN202220818058U CN216950783U CN 216950783 U CN216950783 U CN 216950783U CN 202220818058 U CN202220818058 U CN 202220818058U CN 216950783 U CN216950783 U CN 216950783U
Authority
CN
China
Prior art keywords
oil
air
compression system
drilling machine
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202220818058.7U
Other languages
Chinese (zh)
Inventor
李旭东
何金星
程渊
陆昌杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zoomlion Heavy Industry Science and Technology Co Ltd
Original Assignee
Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN202220818058.7U priority Critical patent/CN216950783U/en
Application granted granted Critical
Publication of CN216950783U publication Critical patent/CN216950783U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Earth Drilling (AREA)

Abstract

The utility model provides a drilling machine air compression system which comprises an air compressor, an air filtering mechanism and an oil-gas separator, wherein the air compressor is connected with the oil-gas separator, the air filtering mechanism is connected with the air compressor, the air compressor is used for compressing and mixing air and oil, the oil-gas separator is used for separating the compressed and mixed air and oil, the air filtering mechanism comprises a first filter, a second filter, an air inlet pipe and an air outlet pipe, the air inlet pipe is connected between the first filter and the second filter, one end of the air outlet pipe is connected with the second filter, and the other end of the air outlet pipe is connected with the air compressor. The air compression system of the drilling machine can meet the requirements of various environments, the air inlet filtering capacity of the air compression system of the drilling machine is improved and increased, and the safety and the reliability are improved. The utility model also relates to an ore machine.

Description

Drilling machine air compression system and mining machine
Technical Field
The utility model relates to the technical field of mine car equipment, in particular to a drilling machine air compression system and an ore machine.
Background
The existing rotary drilling rig needs to provide power through high-pressure air when drilling, the high-pressure air is usually obtained after being processed through a compressor and an oil separation tank, but the rotary drilling rig usually works in a complex mining area or a special environment, the compressor on the existing rotary drilling rig is small in mass, single in use environment, low in filtering capacity, large in vibration of a power assembly and low in safety and reliability.
SUMMERY OF THE UTILITY MODEL
In view of this, the air compression system of the drilling machine can meet the requirements of various environments, the air inlet filtering capacity of the air compression system of the drilling machine is improved and increased, and the safety and the reliability are improved.
The utility model provides a rig air compression system, includes the air compressor machine, filtration mechanism and oil gas separating centrifuge, the air compressor machine is connected with oil gas separating centrifuge, filtration mechanism is connected with the air compressor machine, the air compressor machine is used for mixing air and fluid compression, oil gas separating centrifuge is used for the air and the fluid separation of mixing with compressing, filtration mechanism includes first filter, second filter, intake pipe and outlet duct, intake-tube connection is between first filter and second filter, the one end of outlet duct is connected in the second filter, the other end of outlet duct is connected in the air compressor machine.
In the utility model, the air compression system of the drilling machine further comprises a first conduit and a second conduit, a first oil outlet and a first oil inlet are arranged on the air compressor, a second oil outlet, a second oil inlet and an air outlet are arranged on the oil-gas separator, one end of the first conduit is in butt joint with the first oil outlet, the other end of the first conduit is in butt joint with the second oil inlet, one end of the second conduit is in butt joint with the first oil inlet, the other end of the second conduit is in butt joint with the second oil outlet, and the air outlet is in butt joint with the execution mechanism.
In the utility model, the second conduit comprises a first pipe section and a second pipe section, the drilling machine air compression system further comprises an oil filter, the oil filter is provided with a first connector and a second connector, one end of the first pipe section is in butt joint with the first connector, the other end of the first pipe section is in butt joint with the second oil outlet, one end of the second pipe section is in butt joint with the second connector, and the other end of the second pipe section is in butt joint with the first oil inlet.
In the utility model, the oil filter is also provided with a third interface and a fourth interface, the drilling machine air compression system comprises an oil inlet pipe, an oil return pipe and a radiator, the radiator comprises a third oil inlet and a third oil outlet, one end of the oil inlet pipe is butted with the third interface, the other end of the oil inlet pipe is butted with the third oil inlet, one end of the oil return pipe is butted with the third oil outlet, and the other end of the oil return pipe is butted with the fourth interface.
In the utility model, a temperature control valve is arranged in the oil filter and is used for connecting or blocking a channel among the first interface, the second interface, the third interface and the fourth interface; when the temperature detected by the temperature control valve is lower than a threshold value, the temperature control valve is communicated with the first interface and the second interface, and the third interface and the fourth interface are closed; and when the temperature detected by the temperature control valve is higher than the threshold value, the temperature control valve is communicated with the first interface and the third interface and the second interface and the fourth interface.
In the utility model, the air compression system of the drilling machine further comprises a fixing frame, a first suspension bracket, a second suspension bracket, a first shock absorption pad and a second shock absorption pad, wherein the first shock absorption pad and the second shock absorption pad are oppositely arranged and fixed on the fixing frame, the end part of the first suspension bracket is arranged on the first shock absorption pad and fixedly connected with the fixing frame, the end part of the second suspension bracket is arranged on the second shock absorption pad and fixedly connected with the fixing frame, and the air compressor is fixed between the first suspension bracket and the second suspension bracket.
In the utility model, the air compression system of the drilling machine further comprises a third damping pad, the third damping pad is fixed on the fixing frame, and the bottom of the oil-gas separator is fixed on the third damping pad.
In the utility model, the fixing frame comprises a first longitudinal beam, a second longitudinal beam, a first cross beam and a second cross beam, wherein the first longitudinal beam and the second longitudinal beam are arranged oppositely, the first cross beam and the second cross beam are fixedly connected between the first longitudinal beam and the second longitudinal beam, a first suspension bracket is fixedly connected to the first longitudinal beam, and a second suspension bracket is fixedly connected to the second longitudinal beam.
In the utility model, the air compression system of the drilling machine comprises an engine and a coupler, wherein the coupler is arranged between the engine and an air compressor, one end of the coupler is connected with the engine, and the other end of the coupler is connected with the air compressor.
The utility model also relates to an ore machine comprising the drilling machine air compression system.
According to the air compression system of the drilling machine, the air filtering mechanism is additionally arranged on the traditional air compressor and the oil-gas separator, the filtering capacity of the traditional filter cannot be adapted to the complex working condition environment, the first filter and the second filter are additionally arranged on the air filtering mechanism, the first filter is used for primarily filtering air, filtering a large amount of impurities, dust and the like in the air, the primarily filtered air enters the second filter and is filtered again to obtain pure air, the air inlet filtering capacity can be improved, the air filtering classification treatment can also prolong the service life of the second filter, and the air compression system is suitable for severe environment conditions such as mine drilling explosion.
Drawings
Fig. 1 is a schematic structural view from one perspective of the rig air compression system of the present invention.
Fig. 2 is a schematic structural view from another perspective of the air compression system of the drilling rig of the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to facilitate understanding of those skilled in the art, the present application provides a specific implementation process of the technical solution provided by the present application through the following embodiments.
Fig. 1 is a schematic structural diagram of a perspective of an air compression system of a drilling machine of the present invention, and fig. 2 is a schematic structural diagram of another perspective of the air compression system of the drilling machine of the present invention, as shown in fig. 1 and fig. 2, the air compression system of the drilling machine includes an air compressor 11, an air filtering mechanism 12 and an oil-gas separator 13, the air compressor 11 is connected to the oil-gas separator 13, the air filtering mechanism 12 is connected to the air compressor 11, the air compressor 11 is used for compressing and mixing air and oil, the oil-gas separator 13 is used for separating the compressed and mixed air and oil, the air filtering mechanism 12 includes a first filter 121, a second filter 122, an air inlet pipe 123 and an air outlet pipe 124, the air inlet pipe 123 is connected between the first filter 121 and the second filter 122, one end of the air outlet pipe 124 is connected to the second filter 122, and the other end of the air outlet pipe 124 is connected to the air compressor 11; the air compressor 11 is a two-stage screw compressor, and is more energy-saving and environment-friendly than a common single-stage screw compressor; the first filter 121 is an air pre-filter, the second filter 122 is an air filter, air is pre-filtered by the first filter 121 and then filtered by the second filter 122, and the arrangement of the first filter 121 can reduce the working load of the second filter 122 and prolong the service life of the second filter 122 because mine environment conditions are complex and dust is more; the inlet pipe 123 and the outlet pipe 124 in this embodiment are, for example, rubber hoses; the second filter 122 is further provided with a connecting bracket 19, and the connecting bracket 19 is fixed on other structures such as a carport and is used for fixing and suspending the second filter 122.
According to the air compression system of the drilling machine, the air filtering mechanism 12 is additionally arranged on the traditional air compressor 11 and the oil-gas separator 13, the filtering capacity of the traditional filter cannot be adapted to complex working condition environments, the first filter 121 and the second filter 122 are additionally arranged on the air filtering mechanism 12, the first filter 121 preliminarily filters air, a large amount of impurities, dust and the like in the air are filtered, the preliminarily filtered air enters the second filter 122 and is filtered again to obtain pure air, the air inlet filtering capacity can be improved, the service life of the second filter 122 can be prolonged through air filtering classification treatment, and the air compression system is suitable for severe environment conditions such as mine drilling explosion.
Further, the air compression system of the drilling machine comprises an engine and a coupler, the coupler is arranged between the engine and the air compressor 11, one end of the coupler is connected with the engine, and the other end of the coupler is connected with the air compressor 11; the engine drives the air compressor 11 to generate negative pressure through the coupler and sucks air into the air compressor 11, the air enters the air compressor 11 through the first filter 121 and the second filter 122 and then is compressed and mixed with oil liquid in the air compressor 11 to form a high-pressure oil-gas mixture, and the high-pressure oil-gas mixture is separated into high-pressure air and oil liquid through the oil-gas separator 13.
In an advanced manner, the air compression system of the drilling machine further comprises a first conduit 141 and a second conduit 142, a first oil outlet and a first oil inlet are formed in the air compressor 11, a second oil outlet, a second oil inlet and an air outlet 131 are formed in the oil-gas separator 13, one end of the first conduit 141 is in butt joint with the first oil outlet, the other end of the first conduit 141 is in butt joint with the second oil inlet, one end of the second conduit 142 is in butt joint with the first oil inlet, the other end of the second conduit 142 is in butt joint with the second oil outlet, and the air outlet 131 is in butt joint with the execution mechanism. In the embodiment, the high-pressure oil-gas mixture compressed by the air compressor 11 enters the oil-gas separator 13 through the first conduit 141, the high-pressure air separated by the oil-gas separator 13 is delivered to the actuator, such as an impactor, through the air outlet 131, and the oil separated by the oil-gas separator 13 flows back to the air compressor 11 through the second conduit 142; it should be noted that the air compressor 11 is provided with an oil level line, and the oil level in the air compressor 11 is controlled through the oil level line, so that the safety of the air compression system of the drilling machine under a complex working condition or environment is ensured, and the service life of the air compression system of the drilling machine is prolonged.
Further, the second conduit 142 includes a first pipe section 1421 and a second pipe section 1422, the air compression system of the drilling machine further includes an oil filter 15, the oil filter 15 is provided with a first connector and a second connector, one end of the first pipe section 1421 is in butt joint with the first connector, the other end of the first pipe section 1421 is in butt joint with the second oil outlet, one end of the second pipe section 1422 is in butt joint with the second connector, and the other end of the second pipe section 1422 is in butt joint with the first oil inlet. In this embodiment, the oil filter 15 is additionally arranged to filter oil separated by the oil separator and then return the oil to the air compressor 11, so as to ensure the purity of the oil.
Further, the oil filter 15 is further provided with a third interface and a fourth interface, the drilling machine air compression system comprises an oil inlet pipe 162, an oil return pipe 163 and a radiator 161, the radiator 161 comprises a third oil inlet and a third oil outlet, one end of the oil inlet pipe 162 is in butt joint with the third interface, the other end of the oil inlet pipe 162 is in butt joint with the third oil inlet, one end of the oil return pipe 163 is in butt joint with the third oil outlet, and the other end of the oil return pipe 163 is in butt joint with the fourth interface.
Furthermore, a temperature control valve is arranged in the oil filter 15 and used for connecting or blocking a channel among the first interface, the second interface, the third interface and the fourth interface; when the temperature detected by the temperature control valve is lower than a threshold value, the temperature control valve is communicated with the first interface and the second interface, and the third interface and the fourth interface are closed; when the temperature detected by the temperature control valve is higher than the threshold value, the temperature control valve is connected with the first interface and the third interface and the second interface and the fourth interface, and the oil flows into the radiator 161 through the first interface and the third interface, and flows back to the air compressor 11 through the fourth interface and the second interface after being radiated.
The process of flowing oil liquid is as follows: the oil separated by the oil-gas separator 13 firstly enters the oil filter 15 through the first pipe section 1421, the temperature control valve detects the oil, when the oil is detected to be lower than a threshold value set in the temperature control valve, the temperature control valve is closed, and the oil flows back to the air compressor 11 from the second pipe section 1422 after being filtered by the oil filter 15; when the fact that the oil is higher than a threshold value set in the temperature control valve is detected, the temperature control valve is opened, the oil enters the radiator 161 through the oil inlet pipe 162 after being filtered by the oil filter 15 to be radiated and cooled, the cooled oil flows back to the air compressor 11 from the oil return pipe 163 and the second pipe section 1422, and the oil lubricates a screw in the air compressor 11 and takes away heat in the air compressor 11; in addition, the opening and closing of the temperature control valve and the rotating speed of a cooling fan in the air compressor system of the drilling machine are controlled according to the working load of the air compressor system of the drilling machine and the temperature of oil of the air compressor 11, so that the temperature of the oil of the air compressor 11 is always maintained in an ideal interval, and the stable working cycle process of the air compressor system of the drilling machine is protected.
Further, the air compression system of the drilling machine further comprises a fixing frame 18, a first suspension support 171, a second suspension support 172, a first shock pad (not shown) and a second shock pad (not shown), wherein the first shock pad and the second shock pad are oppositely arranged and fixed on the fixing frame 18, the end portion of the first suspension support 171 is arranged on the first shock pad and fixedly connected with the fixing frame 18, the end portion of the second suspension support 172 is arranged on the second shock pad and fixedly connected with the fixing frame 18, and the air compressor 11 is fixed between the first suspension support 171 and the second suspension support 172. In the embodiment, the first suspension bracket 171 and the second suspension bracket 172 are respectively and fixedly connected to two sides of the air compressor 11, the air compressor 11 is placed in the air, and the distribution form integration degree of other structures such as the air compressor 11, the oil-gas separator 13, the engine or the radiator 161 is higher, so that the device is suitable for arrangement of a movable mechanical space and is beneficial to subsequent maintenance of an air pressure system of a drilling machine; the first shock pad and the second shock pad can reduce the vibration generated by the air compressor 11 in the working process, and the overall stability of the air compression system of the drilling machine is improved; or a proper shock absorber is selected for installation through vibration analysis of a power assembly of the air compression system of the drilling machine; the fixing frame 18 in the present embodiment is, for example, a fixing frame or a vehicle frame generally used for supporting, but not limited thereto.
Further, the fixed frame 18 includes a first longitudinal beam 181, a second longitudinal beam 182, a first cross beam 183, and a second cross beam 184, wherein the first longitudinal beam 181 is disposed opposite to the second longitudinal beam 182, the first cross beam 183 is disposed opposite to the second cross beam 184, the first cross beam 183 and the second cross beam 184 are fixedly connected between the first longitudinal beam 181 and the second longitudinal beam 182, the first suspension bracket 171 is fixedly connected to the first longitudinal beam 181 by a bolt, and the second suspension bracket 172 is fixedly connected to the second longitudinal beam 182 by a bolt.
Further, the air compression system of the drilling machine further comprises a third shock pad, the third shock pad is fixed on the fixing frame 18, and the bottom of the oil-gas separator 13 is fixed on the third shock pad. The third shock pad can reduce the vibration generated by the operation of the oil-liquid separator and increase the stability of the air compression system of the drilling machine, and the third shock pad is rectangular or circular.
The utility model also relates to an ore machine comprising the drilling machine air compression system. The drilling machine in the embodiment is, for example, a down-the-hole drilling machine or a rotary drilling machine.
The present invention is not limited to the specific details of the above-described embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.

Claims (10)

1. An air compression system of a drilling machine is characterized by comprising an air compressor (11), an air filtering mechanism (12) and an oil-gas separator (13), the air compressor (11) is connected with the oil-gas separator (13), the air filtering mechanism (12) is connected with the air compressor (11), the air compressor (11) is used for compressing and mixing air and oil liquid, the oil-gas separator (13) is used for separating the compressed and mixed air and the oil liquid, the air filtering mechanism (12) comprises a first filter (121), a second filter (122), an air inlet pipe (123) and an air outlet pipe (124), the intake pipe (123) is connected between the first filter (121) and the second filter (122), one end of the air outlet pipe (124) is connected to the second filter (122), the other end of the air outlet pipe (124) is connected with the air compressor (11).
2. The air compression system of the drilling machine according to claim 1, further comprising a first conduit (141) and a second conduit (142), wherein a first oil outlet and a first oil inlet are formed in the air compressor (11), a second oil outlet, a second oil inlet and an air outlet (131) are formed in the oil-gas separator (13), one end of the first conduit (141) is in butt joint with the first oil outlet, the other end of the first conduit (141) is in butt joint with the second oil inlet, one end of the second conduit (142) is in butt joint with the first oil inlet, the other end of the second conduit (142) is in butt joint with the second oil outlet, and the air outlet (131) is in butt joint with an execution mechanism.
3. The drilling machine air compression system of claim 2, wherein the second conduit (142) comprises a first pipe section (1421) and a second pipe section (1422), the drilling machine air compression system further comprising an oil filter (15), the oil filter (15) being provided with a first port and a second port, one end of the first pipe section (1421) being in abutment with the first port, the other end of the first pipe section (1421) being in abutment with the second oil outlet, one end of the second pipe section (1422) being in abutment with the second port, and the other end of the second pipe section (1422) being in abutment with the first oil inlet.
4. The air compression system of the drilling machine according to claim 3, wherein the oil filter (15) is further provided with a third interface and a fourth interface, the air compression system of the drilling machine comprises an oil inlet pipe (162), an oil return pipe (163) and a radiator (161), the radiator (161) comprises a third oil inlet and a third oil outlet, one end of the oil inlet pipe (162) is in butt joint with the third interface, the other end of the oil inlet pipe (162) is in butt joint with the third oil inlet, one end of the oil return pipe (163) is in butt joint with the third oil outlet, and the other end of the oil return pipe (163) is in butt joint with the fourth interface.
5. The drilling machine air compression system according to claim 4, characterized in that a thermostatic valve is arranged in the oil filter (15) and is used for connecting or blocking a passage among the first port, the second port, the third port and the fourth port; when the temperature detected by the temperature control valve is lower than a threshold value, the temperature control valve is communicated with the first interface and the second interface, and the third interface and the fourth interface are closed; when the temperature detected by the temperature control valve is higher than the threshold value, the temperature control valve is communicated with the first interface and the third interface and the second interface and the fourth interface.
6. The air compression system of drilling machine according to any one of claims 1 to 5, characterized by further comprising a fixed frame (18), a first suspension bracket (171), a second suspension bracket (172), a first shock pad and a second shock pad, wherein the first shock pad and the second shock pad are oppositely arranged and fixed on the fixed frame (18), the end of the first suspension bracket (171) is arranged on the first shock pad and fixedly connected with the fixed frame (18), the end of the second suspension bracket (172) is arranged on the second shock pad and fixedly connected with the fixed frame (18), and the air compressor (11) is fixed between the first suspension bracket (171) and the second suspension bracket (172).
7. The drilling machine air compression system as recited in claim 6, further comprising a third shock pad fixed to the mount (18), the bottom of the oil-gas separator (13) being fixed to the third shock pad.
8. The air compression system of the drilling machine according to claim 6, wherein the fixed frame (18) comprises a first longitudinal beam (181), a second longitudinal beam (182), a first cross beam (183) and a second cross beam (184), the first longitudinal beam (181) and the second longitudinal beam (182) are arranged oppositely, the first cross beam (183) and the second cross beam (184) are fixedly connected between the first longitudinal beam (181) and the second longitudinal beam (182), the first suspension bracket (171) is fixedly connected to the first longitudinal beam (181), and the second suspension bracket (172) is fixedly connected to the second longitudinal beam (182).
9. The air compression system of the drilling machine according to any one of claims 1 to 5, characterized in that the air compression system of the drilling machine comprises an engine and a coupling, the coupling is arranged between the engine and the air compressor (11), one end of the coupling is connected with the engine, and the other end of the coupling is connected with the air compressor (11).
10. A mining machine comprising a drilling rig air compression system as claimed in any one of claims 1 to 9.
CN202220818058.7U 2022-04-08 2022-04-08 Drilling machine air compression system and mining machine Active CN216950783U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220818058.7U CN216950783U (en) 2022-04-08 2022-04-08 Drilling machine air compression system and mining machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220818058.7U CN216950783U (en) 2022-04-08 2022-04-08 Drilling machine air compression system and mining machine

Publications (1)

Publication Number Publication Date
CN216950783U true CN216950783U (en) 2022-07-12

Family

ID=82301945

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220818058.7U Active CN216950783U (en) 2022-04-08 2022-04-08 Drilling machine air compression system and mining machine

Country Status (1)

Country Link
CN (1) CN216950783U (en)

Similar Documents

Publication Publication Date Title
CN204552696U (en) Oil well associated gas automatic processing device
CN206146071U (en) Two times oil pipe oil separator
CN216950783U (en) Drilling machine air compression system and mining machine
CN201650741U (en) Screw type air compressor used for shield machine
CN205252848U (en) Integrated type air dryer device of function
CN212930550U (en) Air source heat pump with good noise reduction effect
CN101476485A (en) Large coal bed gas recovery apparatus set
CN210461067U (en) Air compressor safety monitoring system for coal mine
CN2260179Y (en) Air compressor with oil-cooling and low noise
CN208238390U (en) Helium gas compression purifier group system
CN213870287U (en) Air compressor oil-gas separation device for new energy automobile
CN201339481Y (en) Large complete coal-bed gas recovery device
CN220929670U (en) Two-stage compression permanent magnet variable frequency air compressor for inert gas pressurization
CN219605369U (en) Oil-liquid separator
CN217152072U (en) Centrifugal ventilator of engine
CN218151439U (en) Oil-cooled screw air compressor
CN211450353U (en) Oil-gas separation system of natural gas filling station
CN218439662U (en) Synthetic ammonia compression workshop section system
CN214648268U (en) There is not oily wind regime device and vehicle
CN218293559U (en) Gas lift truck
CN220890455U (en) Auxiliary air supply device for subway
CN214036048U (en) Air compressor machine of extension oil gas filter life-span
CN215259244U (en) Oil field well head gas and on-vehicle combustible gas recovery system that volatilizees
CN214715061U (en) Gas-driven oil-gas oil-smoke oil mist recovery and purification device
CN220125879U (en) Strong mass transfer desulfurizing dust-removing purifying fan

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant