CN106500799A - A kind of contactless level alarming device of rotary drill and method - Google Patents
A kind of contactless level alarming device of rotary drill and method Download PDFInfo
- Publication number
- CN106500799A CN106500799A CN201610814822.2A CN201610814822A CN106500799A CN 106500799 A CN106500799 A CN 106500799A CN 201610814822 A CN201610814822 A CN 201610814822A CN 106500799 A CN106500799 A CN 106500799A
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- China
- Prior art keywords
- rotary drill
- oil
- diffusing reflection
- relay
- switch
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 72
- 230000001934 delay Effects 0.000 claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 16
- 239000010687 lubricating oil Substances 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 5
- 238000011897 real-time detection Methods 0.000 claims description 3
- 239000010721 machine oil Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229920005479 Lucite® Polymers 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
Abstract
The present invention proposes a kind of contactless level alarming device of rotary drill and method, belongs to mining rotary drill apparatus field, and the device includes being arranged at diffusing reflection switch, support, control section, switch board and the control station that rotary drill barrel of oil and gas sees oil mirror side；Wherein, described control section includes industry control Switching Power Supply, the first relay, the second relay, scalable Voltage stabilizing module and delays time to control module；The present invention has filled up the blank of mine rotary drill warning technology, efficiently solve rotary drill operating in due to relief valve oil spout, circulating pipe oil leak when staff can be scented a hidden danger in operating room in time, clearly judge that air compressor lubricating oil amount is not enough, reduce the fatigue strength and tensity of staff, the work efficiency of rotary drill is improve, the present invention can operate with the rotary drill of bargh's distinct device type.
Description
Technical field
The invention belongs to mining rotary drill apparatus field, and in particular to a kind of contactless warning dress of rotary drill
Put and method.
Background technology
The main air compressor machine of rotary drill is the critical piece in production operation, completes perforation process for rotary drill and provides work
Industry wind；Before production operation and operation in it has to be ensured that air compressor lubricating oil oil level be in standard oil level；Rotary drill department
Machine is all that observation is arranged on the sight oil mirror of air compressor oil-gas barrel side whether to confirm lubricating oil level in mark before production operation
Accurate；During actual job, due to there is relief valve oil spout, making air compressor lubricating oil amount not when circulating pipe oil leak
Foot, driver can not be found in time in operating room operation rotary drill operation, so that rotary drill disorderly closedown, causes air compressor machine
Negative and positive rotor fault, air compressor host are scrapped.
Content of the invention
For the deficiencies in the prior art, the present invention proposes a kind of contactless level alarming device of rotary drill and method,
Make staff find that in actual production the air compressor lubricating oil amount of rotary drill is not enough in time by warning function, stop in time
Machine, it is to avoid cause equipment fault due to lacking lubricating oil, save equipment cost, lift production operation efficiency.
A kind of contactless level alarming device of rotary drill, the device include that being arranged at rotary drill barrel of oil and gas sees oil mirror
The diffusing reflection switch of side, support, control section, switch board and control station；Wherein, described control section includes that industry control is switched
Power supply, the first relay, the second relay, scalable Voltage stabilizing module and delays time to control module；
Described diffusing reflection switch is arranged at the upper end of support, and its transmitting terminal sees the setting of oil mirror with rotary drill barrel of oil and gas
Scope alignment is placed；The outfan of diffusing reflection switch connects the input of delays time to control module；Delays time to control module outfan is same
When connection switch board and the first relay, the outfan connection control station of the first relay；
Described second relay connection 220V power supplys, the outfan of the second relay is simultaneously connected with switch board and industry control is opened
The input in powered-down source, the outfan of industry control Switching Power Supply are simultaneously connected with delays time to control module and scalable Voltage stabilizing module, adjustable
The outfan of section Voltage stabilizing module connects the power end at diffuse-reflectance beginning.
Described switch board includes that high-pressure system stops display lamp and system operation display lamp, and wherein, high-pressure system stops
Display lamp is connected with the second relay；System operation display lamp is connected with delays time to control module.
Described control station includes that audible-visual annunciator, audible-visual annunciator are connected with the first relay.
Described diffusing reflection switch is positioned over the side that rotary drill barrel of oil and gas sees oil mirror, and 3～5mm of distance.
Its described transmitting terminal and rotary drill barrel of oil and gas are seen the set point of oil mirror and are alignd placement, specially：Which is launched
End is arranged at more than rotary drill barrel of oil and gas sight oil mirror lower limit scale at 1～3mm.
The alarm method carried out using the contactless level alarming device of rotary drill, is comprised the following steps：
Step 1, the level height adopted in diffusing reflection switch real-time detection rotary drill barrel of oil and gas sight oil mirror, work as diffuse-reflectance
The non-visible light that the transmitting terminal of switch sends can be passed through when seeing oil mirror, i.e. the receiving terminal of diffusing reflection switch is not received by non-visible
Light, then execution step 2；When the non-visible light that the transmitting terminal of diffusing reflection switch sends cannot be passed through sees oil mirror, i.e. non-visible light
By the lubricating oil that sees in the oil mirror receiving terminal is reflected back by diffusing reflection switch, then diffusing reflection switch is without outputs level signals；
Step 2, diffusing reflection switch outputs level signals are to delays time to control module；
Step 3, delays time to control module are reported to the police and are shown by audible-visual annunciator in the first Control switch board
Display lamp.
Advantage of the present invention：
The present invention proposes a kind of contactless level alarming device of rotary drill and method, has filled up mine rotary drill machine oil
The blank of position alarm technique, efficiently solves in rotary drill operating due to feelings such as relief valve oil spout, circulating pipe oil leaks
During condition, staff can be scented a hidden danger in time in operating room, clearly judged that air compressor lubricating oil amount is not enough, reduced work people
The fatigue strength and tensity of member, improves the work efficiency of rotary drill, and the present invention can operate with bargh's distinct device class
The rotary drill of type.
Description of the drawings
Rotary drill contactless level alarming device structured flowcharts of the Fig. 1 for one embodiment of the present invention；
Alarm device electrical construction schematic diagrams of the Fig. 2 for one embodiment of the present invention；
Rotary drill contactless warning method flow diagrams of the Fig. 3 for one embodiment of the present invention；
Detection principle figures of the Fig. 4 for the oil level of one embodiment of the present invention when nonstandard；
Detection principle figure when Fig. 5 is the oil level standard of one embodiment of the present invention；
Rotary drill contactless level alarming device operation logic figures of the Fig. 6 for one embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings an embodiment of the present invention is described further.
The present invention is lucite material using the sight oil mirror of rotary drill air compressor oil-gas barrel, due to its have transparent, The property of printing opacity, then the present invention using diffusing reflection switch in the case where detecting object is not contacted, by diffusing reflection switch penetrating end sends non-visible light and surveys the sight oil mirror inside of barrel of oil and gas and whether have lubricating oil, thereby realize the function of reporting to the police.
In the embodiment of the present invention, as shown in Figure 1 (in figure, 1 represents sight oil mirror, and 2 represent diffusing reflection switch, and 3 represent supports),
The contactless level alarming device of rotary drill include being arranged at rotary drill barrel of oil and gas see 1 side of oil mirror diffusing reflection switch 2,
Support 3, control section, switch board and control station；Wherein, described control section includes industry control Switching Power Supply, the first relay
NO, the second relay NC, scalable Voltage stabilizing module and delays time to control module；Described switch board includes that high-pressure system stops indicating
Lamp and system operation display lamp, described control station include audible-visual annunciator；
In the embodiment of the present invention, this alarm device input power is 24V, according to rotary drill practical power service condition,
Described industry control Switching Power Supply selects input 220V to export the industry control Switching Power Supply of 24V；Described diffusing reflection switch adopts model
For three line style diffusing reflection switch of E3F1-DS5C4 direct currents, 0～100mm of distance of reaction is adjustable, and small volume is easy to install, is difficult scratching,
Three line diffusing reflection switch of E3F1-DS5C4 direct currents employs hermetically sealed design, plays water proof and dust proof oil pollution, and built-in action refers to
Show that lamp facilitates staff intuitively to understand the ruuning situation of diffusing reflection switch；The first described relay NO and the second relay NC
Model Omron MY4N-J DC24V, be a kind of electric control device；Described scalable Voltage stabilizing module adopts model
LM2596 5A, it can apply input voltage higher than output voltage blood pressure lowering field, be 38v within Voltage Cortrol arrive
Suitable voltage is protecting diffusing reflection switch and delays time to control module, very high to guarantee to make it have under complicated service condition
Stability；Described delays time to control module adopts model FRM01, and which adopts microcontroller as main control unit, and preset 18
Plant function, it is possible to according to demand, customize and add specific function；Described audible-visual annunciator adopts model AD16-22SM,
High brightness pure color LED luminescence chip is adopted for light source, life-span length, consume energy low, small volume, lightweight, reliability are high；Described props up
Frame is made using the square galvanized pipes of 20mm, for fixing diffusing reflection switch.
The purpose of delays time to control module, in the embodiment of the present invention, is installed：The air compressor machine of rotary drill in initial launch, by
In positions such as lubrication oil circulation to oil pipe line, radiators, oil level fluctuation is larger may to cause this device to be reported to the police, so passing through pneumatics
Machine run indicator is to electricity in delays time to control module, the 6V～38V level letter for making delays time to control module export diffusing reflection switch
Number carry out timeliness obstruct (timeliness is 30 seconds i.e. air compressor machine Initial operation oil level fluctuation phase), the first relay NO power-off of control, sound
Light crossing-signal without the signal of telecommunication, so as to solve because during air compressor machine initial start stage, oil level fluctuates big and caused this device false alarm.
In the embodiment of the present invention, diffusing reflection switch is arranged at the upper end of support, and its transmitting terminal is seen with rotary drill barrel of oil and gas
The set point alignment of oil mirror is placed；The outfan of diffusing reflection switch connects the input of delays time to control module；Delays time to control mould
Block outfan is simultaneously connected with switch board and the first relay, the outfan connection control station of the first relay；Second relay connects
220V power supplys are connect, the outfan of the second relay is simultaneously connected with the input of switch board and industry control Switching Power Supply, industry control switch electricity
The outfan in source is simultaneously connected with delays time to control module and scalable Voltage stabilizing module, and the outfan connection of scalable Voltage stabilizing module is unrestrained anti-
Penetrate the power end at beginning；High-pressure system is stopped display lamp and is connected with the second relay；System operation display lamp and delays time to control
Module is connected；Audible-visual annunciator is connected with the first relay, specific as follows：
In the embodiment of the present invention, by actually used principle, the device is divided into control section, probe portion and early warning when installing
Part；Probe portion includes diffusing reflection switch and special stand；Early warning part includes audible-visual annunciator；Install the control section
In the electrical control cabinet of the air compressor machine of rotary drill, base plate is thick using insulating epoxy bakelite plate 0.5MM, and fixed component includes
24V industry control Switching Power Supplies, Omron MY4N-J DC24V relay NC, Omron MY4N-J DC24V relay NO, FRM01 prolong
When control module, LM2596 5A scalable Voltage stabilizing modules, the connection of each part is using at BVR0.5 square of wire terminal cold end terminal
Reason；
In the embodiment of the present invention, the probe portion uses three line style diffusing reflection switch of E3F1-DS5C4 direct currents, three lines point
Not Wei brown line power supply+, black line power supply-, blue line high level output, brown line and black line connection LM2596 5A adjustable
Section Voltage stabilizing module, blue line connect FRM01 delays time to control modules, are placed on the right side of sight oil mirror at 3～5mm of distance, are easy to see oil
The maintenance and replacing of mirror；The special stand made of the square galvanized pipes of 20mm is fixed, to avoid vibration influence during equipment availability
Detection accuracy；The probe portion is non-contacting with barrel of oil and gas, will leave 3～5mm or so gaps with the bucket wall of barrel of oil and gas, this
Sample ensure that the present invention (70～95 degrees Celsius) in rotary drill air compressor machine high temperature is not damaged by, and solve barrel of oil and gas high temperature institute
The unfavorable factor that brings；The detecting location of the non-visible light that the diffusing reflection switch sends will be being seen more than oil mirror lower limit scale 1
At～3mm；Diffusing reflection switch individually connects, and separates with control section, is having little influence on rotary drill production effect if any damaging
Realize changing in the case of rate.
In the embodiment of the present invention, the early warning part is placed on drivers' cab control station using AD16-22SM audible-visual annunciators
To observe, perforation 22mm circular openings connect Omron MY4N-J DC24V relay NO after being fixed and which are entered for operating space
Row control.
In the embodiment of the present invention, BVR0.5 lines are drawn from rotary drill 220V power supplys and be connected to Omron MY4N-J DC24V
Relay NC, while the coil of Omron MY4N-J DC24V relay NC is stopped display lamp with high-pressure system be connected, since
Identification high-pressure system stops indicating that electric signal output gives relay NC coils, so as to realize the action of 24V industry control Switching Power Supplies.
In the embodiment of the present invention, as shown in Fig. 2 being drawn from 24V industry controls Switching Power Supply using BVR0.5 lines, point two-way, one
Road connection Omron MY4N-J DC24V relays (NO and NC) power supply, another road connect LM2596 5A scalable Voltage stabilizing modules,
Connect FRM01 delays time to control module from LM2596 5A scalable Voltage stabilizing module again and the three line diffuse-reflectance of E3F1-DS5C4 direct currents is opened
Power supply is closed, the blue line level that FRM01 delays time to control modules triggering end is connected three line diffusing reflection switch of E3F1-DS5C4 direct currents
Signal output, outfan connection Omron MY4N-J DC24V relays (NO) coils directly control audible-visual annunciator action.
In the embodiment of the present invention, the connected mode of each part of this device is connected using cold end terminal, it is ensured that system each
Module reliability each other.
The alarm method carried out using the contactless level alarming device of rotary drill, as shown in figure 3, including following step
Suddenly：
Step 1, the level height adopted in diffusing reflection switch real-time detection rotary drill barrel of oil and gas sight oil mirror, work as diffuse-reflectance
The non-visible light that the transmitting terminal of switch sends can be passed through when seeing oil mirror, i.e. the receiving terminal of diffusing reflection switch is not received by non-visible
Light, then execution step 2；When the non-visible light that the transmitting terminal of diffusing reflection switch sends cannot be passed through sees oil mirror, i.e. non-visible light
By the lubricating oil that sees in the oil mirror receiving terminal is reflected back by diffusing reflection switch, then diffusing reflection switch is without outputs level signals；
In the embodiment of the present invention, as shown in Figure 4 (in figure, 4 represent the upper limit, and 5 represent lower limit, and 6 represent lubricating oil), when unrestrained anti-
Penetrate the non-visible light that the transmitting terminal of switch sends to pass through when seeing oil mirror, the receiving terminal of diffusing reflection switch is not received by non-visible
Light, diffusing reflection switch export 6V～38V level signals, that is, show that lubricants capacity is not enough, and oil level is nonstandard, and level signal is acted on
Relay NO audible-visual annunciators, audible-visual annunciator obtain electric alarm；If conversely, as shown in figure 5, the transmitting terminal of diffusing reflection switch is sent out
The non-visible light for going out cannot be passed through when seeing oil mirror, i.e., non-visible light is reflected back connecing for diffusing reflection switch by the lubricating oil that sees in oil mirror
Receiving end, after the receiving terminal of diffusing reflection switch receives non-visible light, diffusing reflection switch shows lubricating oil without outputs level signals
Abundance, oil level standard；
Step 2, diffusing reflection switch outputs level signals are to delays time to control module；
Step 3, delays time to control module are reported to the police and are shown by audible-visual annunciator in the first Control switch board
Display lamp.
In the embodiment of the present invention, as shown in fig. 6, the device is in parallel with rotary drill high-pressure system stopping display lamp, work as tooth
When wheel rig starts, high-pressure system stops display lamp and gives relay NC (when rotary drill starts high pressure systems by electric signal output
It is OFF state that system stops display lamp, and therefore using relay NC, i.e., when high-pressure system stops display lamp extinguishing, relay NC is
Conducting state), control industry control Switching Power Supply is exported to electricity in scalable Voltage stabilizing module, then suitable by the output of scalable Voltage stabilizing module
For slow reflex switch and the burning voltage of delays time to control module；Diffusing reflection switch is carried out detection sight by non-visible light is sent after electricity
Oil mirror, detect see oil mirror inside without lubricating oil in the case of export 6V～38V level signals, by delays time to control module
Level signal is acted on relay NO to be controlled audible-visual annunciator, audible-visual annunciator is reported to the police.
Claims (6)
1. the contactless level alarming device of a kind of rotary drill, it is characterised in that the device includes being arranged at rotary drill machine oil
Diffusing reflection switch, support, control section, switch board and the control station of oil mirror side seen by gas bucket；Wherein, described control unit subpackage
Include industry control Switching Power Supply, the first relay, the second relay, scalable Voltage stabilizing module and delays time to control module；
Described diffusing reflection switch is arranged at the upper end of support, and its transmitting terminal sees the set point of oil mirror with rotary drill barrel of oil and gas
Alignment is placed；The outfan of diffusing reflection switch connects the input of delays time to control module；Delays time to control module outfan connects simultaneously
Connect switch board and the first relay, the outfan connection control station of the first relay；
Described the second relay connection 220V power supplys, the outfan of the second relay are simultaneously connected with switch board and industry control switch electricity
The input in source, the outfan of industry control Switching Power Supply are simultaneously connected with delays time to control module and scalable Voltage stabilizing module, and scalable is steady
The outfan of die block connects the power end at diffuse-reflectance beginning.
2. the contactless level alarming device of rotary drill according to claim 1, it is characterised in that described switch board
Stop display lamp and system operation display lamp including high-pressure system, wherein, high-pressure system stops display lamp and the second relay phase
Connection；System operation display lamp is connected with delays time to control module.
3. the contactless level alarming device of rotary drill according to claim 1, it is characterised in that described control station
Including audible-visual annunciator, audible-visual annunciator is connected with the first relay.
4. the contactless level alarming device of rotary drill according to claim 1, it is characterised in that described diffuse-reflectance
Switch is positioned over the side that rotary drill barrel of oil and gas sees oil mirror, and 3～5mm of distance.
5. the contactless level alarming device of rotary drill according to claim 1, it is characterised in that its described is launched
Hold, specially：Its transmitting terminal is arranged at rotary drill oil gas
More than bucket sight oil mirror lower limit scale at 1～3mm.
6. the alarm method for being carried out using the contactless level alarming device of rotary drill described in claim 1, its feature are existed
In comprising the following steps：
Step 1, the level height adopted in diffusing reflection switch real-time detection rotary drill barrel of oil and gas sight oil mirror, work as diffusing reflection switch
The non-visible light that sends of transmitting terminal can pass through when seeing oil mirror, i.e. the receiving terminal of diffusing reflection switch is not received by non-visible light,
Then execution step 2；When the non-visible light that the transmitting terminal of diffusing reflection switch sends cannot be passed through sees oil mirror, i.e., non-visible light is seen
Lubricating oil in oil mirror is reflected back the receiving terminal of diffusing reflection switch, then diffusing reflection switch is without outputs level signals；
Step 2, diffusing reflection switch outputs level signals are to delays time to control module；
Step 3, delays time to control module are reported to the police and are shown instruction by audible-visual annunciator in the first Control switch board
Lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814822.2A CN106500799B (en) | 2016-09-12 | 2016-09-12 | A kind of contactless level alarming device of rotary drill and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814822.2A CN106500799B (en) | 2016-09-12 | 2016-09-12 | A kind of contactless level alarming device of rotary drill and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106500799A true CN106500799A (en) | 2017-03-15 |
| CN106500799B CN106500799B (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610814822.2A Active CN106500799B (en) | 2016-09-12 | 2016-09-12 | A kind of contactless level alarming device of rotary drill and method |
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Citations (4)
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|---|---|---|---|---|
| US5973770A (en) * | 1998-05-06 | 1999-10-26 | Quantum Imaging, Inc. | Method for measuring the relative proximity of and interacting with a plurality of media/molecular structures |
| CN103500682A (en) * | 2013-09-28 | 2014-01-08 | 国家电网公司 | Transformer body gas relay with existing gas detection function |
| CN104391302A (en) * | 2014-11-13 | 2015-03-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for measuring ullage and material level of mine deep-hole chute |
| CN205388503U (en) * | 2015-12-31 | 2016-07-20 | 山东荣邦汽配有限公司 | A hydraulic press hydraulic pressure oil level automated inspection alarm device for brake block production |
-
2016
- 2016-09-12 CN CN201610814822.2A patent/CN106500799B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973770A (en) * | 1998-05-06 | 1999-10-26 | Quantum Imaging, Inc. | Method for measuring the relative proximity of and interacting with a plurality of media/molecular structures |
| CN103500682A (en) * | 2013-09-28 | 2014-01-08 | 国家电网公司 | Transformer body gas relay with existing gas detection function |
| CN104391302A (en) * | 2014-11-13 | 2015-03-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and method for measuring ullage and material level of mine deep-hole chute |
| CN205388503U (en) * | 2015-12-31 | 2016-07-20 | 山东荣邦汽配有限公司 | A hydraulic press hydraulic pressure oil level automated inspection alarm device for brake block production |
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| Title |
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| CN106500799B (en) | 2019-05-31 |
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