CN108895235A - A kind of safety return-flow device - Google Patents
A kind of safety return-flow device Download PDFInfo
- Publication number
- CN108895235A CN108895235A CN201811101225.0A CN201811101225A CN108895235A CN 108895235 A CN108895235 A CN 108895235A CN 201811101225 A CN201811101225 A CN 201811101225A CN 108895235 A CN108895235 A CN 108895235A
- Authority
- CN
- China
- Prior art keywords
- safety
- pipeline
- valve
- pressure
- flow device
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/03—Branch units, e.g. made in one piece, welded, riveted comprising junction pieces for four or more pipe members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
Abstract
The application discloses a kind of safety return-flow device, compared with prior art, including：It is installed on the conduit connection of pump discharge；The first pipeline branch being connected to conduit connection；It is installed on the first pipeline branch road, for exporting the pressure stabilizing aerial drainage mechanism of liquid in the first pipeline branch；It is connected to pressure stabilizing aerial drainage mechanism, and is connected to the return line component of oiling case.When system pressure is more than safe pressure, pressure stabilizing aerial drainage mechanism movement, oil liquid flows back into oiling case by return line component；Patrol officer sees that pressure stabilizing aerial drainage mechanism movement acts, and illustrates that line pressure is excessively high, can carry out maintenance down in time, to protect equipment installation and associated safety personnel.Safety return-flow device provided by the present application can effectively reduce the presence with pre- superpressure preventing operation risk compared to existing technologies, increase equipment stable operation cycle, the preferably personal safety of protection equipment installation and associated safety personnel.
Description
Technical field
This application involves mechanical device field of instrumentation technology, more specifically more particularly to a kind of safety return-flow device.
Background technique
Currently, in many industries especially petrochemical industry, in each Pipe installing using preceding needing to try pipeline
Pressure test, wherein the pipeline that the internal pressure value of equipment and system is guided on pressure gauge or pressure sensor is known as pressure guiding pipe.
In the prior art, people usually pump discharge install pressure gauge detection pump discharge pressure whether be more than operating pressure very
It is more, judge whether impulse pipeline blocks with this.
However, with above method at most can only fuzzy detection impulse pipeline whether be more than pipeline bear pressure, it is difficult to effectively
Protect relevant device and the safety of producers in ground；Meanwhile pressure gauge will be calibrated at regular intervals, it is possible to delay equipment
It operates normally；If pipeline has been blocked, vacuum pump can be suppressed ceaselessly in oiling, since liquid is not compressible, will cause pressure guiding pipe
The infinite increase of pressure, it is possible to pressure guiding pipe, associated adapter and valve can be damaged, or even cause the irreversible damage of vacuum pump.
Therefore it provides a kind of safety return-flow device, can effectively reduce the presence with pre- superpressure preventing operation risk, increase is set
Standby stable operation cycle, the preferably personal safety of protection equipment installation and associated safety personnel, have become art technology
Personnel's technical problem urgently to be resolved.
Summary of the invention
In order to solve the above technical problems, the application provides a kind of safety return-flow device, can effectively reduce and pre- superpressure preventing
The presence of operation risk increases equipment stable operation cycle, the preferably person peace of protection equipment installation and associated safety personnel
Entirely.
Technical solution provided by the present application is as follows：
A kind of safety return-flow device, including：It is installed on the conduit connection of pump discharge；First be connected to conduit connection
Pipeline branch；It is installed on the first pipeline branch road, for exporting the pressure stabilizing aerial drainage mechanism of liquid in the first pipeline branch；With pressure stabilizing
Aerial drainage mechanism connection, and it is connected to the return line component of oiling case.
Further, in a kind of preferred mode of the present invention, conduit connection is specially four-way conduit coupling, four-way
Conduit coupling is connected to pump discharge, the first pipeline branch respectively；Four-way conduit coupling be also communicated with the second pipeline branch and
Third pipeline branch；Second pipeline branch road is equipped with pressure gauge, and third pipeline branch is connected to instrument pipeline.
Further, in a kind of preferred mode of the present invention, pressure stabilizing aerial drainage mechanism includes：It is installed on the first pipeline branch
On safety overflow valve；For regulating and controlling the safety value set mechanism of the overflow safety pressure value of setting safety overflow valve.
Further, in a kind of preferred mode of the present invention, return line component includes：It is connected to pressure stabilizing aerial drainage mechanism
Pipeline main body；And it is connected to pipeline main body, and be connected to the auxiliary piping of oiling case；The cut-off being set in pipeline main body
Valve and throttle valve.
Further, in a kind of preferred mode of the present invention, safety return-flow device further includes：For prompt person pipeline
Hypertonia needs the warning note mechanism of maintenance down.
Further, in a kind of preferred mode of the present invention, oil filter is additionally provided on return line component.
Further, in a kind of preferred mode of the present invention, pressure sensor is additionally provided on return line component.
Further, in a kind of preferred mode of the present invention, oil liquid temperature regulation is additionally provided on return line component
Mechanism.
Further, in a kind of preferred mode of the present invention, safety overflow valve includes：Valve body；It is set on valve body
First hydraulic fluid port and the second hydraulic fluid port；Sliding is set to the buffering valve pocket in valve body and separating the first hydraulic fluid port, the second hydraulic fluid port；It buffers in valve pocket
Equipped with the main valve core cavity being connected to the first hydraulic fluid port, and buffers valve pocket and be formed with cushion chamber with valve body；Trimmer valve, which is put on, is equipped with connection
The damp channel of first hydraulic fluid port and cushion chamber；The main valve plug being crimped on main valve core cavity valve port；It is connected to the other end of valve body
Screw-casing, swivel nut is interior to be equipped with pressure regulating device, one end connection of pressure regulating device and main valve plug, the opening and closing for control bound core.
A kind of safety return-flow device provided by the invention, compared with prior art, including：The pipeline for being installed on pump discharge connects
Socket part, conduit connection are communicated with the first pipeline branch, and the first pipeline branch road is equipped with for exporting in the first pipeline branch
The pressure stabilizing aerial drainage mechanism of liquid, pressure stabilizing aerial drainage mechanism is communicated with return line component, and return line component is connected to oiling case.
In this way, pressure stabilizing aerial drainage mechanism movement, oil liquid is flowed back by return line component when whole system pressure is more than safe pressure
In oiling case；Patrol officer sees that pressure stabilizing aerial drainage mechanism movement acts, and illustrates that line pressure is excessively high, can carry out shutdown inspection in time
Repair, to protect equipment installation and associated safety personnel, compared to existing technologies, this application involves safety return-flow device energy
Enough effectively reduce the presence with pre- superpressure preventing operation risk, increase equipment stable operation cycle, preferably protection equipment installation and
The personal safety of associated safety personnel.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of safety return-flow device provided in an embodiment of the present invention.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the application, the application will be implemented below
Technical solution in example is clearly and completely described, it is clear that described embodiment is only that a part of the application is implemented
Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, shall fall in the protection scope of this application under the premise of labour.
It should be noted that it can directly exist when element is referred to as on " being fixed on " or " being set to " another element
On another element or indirectly setting on the other element；When an element is known as " being connected to " another element,
It can be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", under ", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.It is multiple in the description of the present application ", " several " be meant that two or
Two or more, unless otherwise specifically defined.
It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification to be taken off
The content shown is not limited to the enforceable qualifications of the application so that those skilled in the art understands and reads, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the application
Under the effect of can be generated and the purpose that can reach, it should all still fall in techniques disclosed in this application content and obtain the model that can cover
In enclosing.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be also only
Convenient for being illustrated for narration, rather than to limit the enforceable range of the application, relativeness is altered or modified, in no essence
It changes under technology contents, when being also considered as the enforceable scope of the application.
Please as shown in Figure 1, the embodiment of the present invention provides a kind of safety return-flow device, including：It is installed on the pipeline of pump discharge
Interconnecting piece 1；The first pipeline branch 2 being connected to conduit connection 1；It is installed on the first pipeline branch 2, for exporting the first pipe
The pressure stabilizing aerial drainage mechanism 3 of liquid in road branch 2；It is connected to pressure stabilizing aerial drainage mechanism 3, and is connected to the return line component of oiling case
4。
Safety return-flow device provided in an embodiment of the present invention, compared with prior art, the present embodiments relate to safety
Reflux unit includes：It is installed on the conduit connection 1 of pump discharge, conduit connection 1 is communicated with the first pipeline branch 2, the first pipe
Pressure stabilizing aerial drainage mechanism 3 for exporting liquid in the first pipeline branch 2 is installed, pressure stabilizing aerial drainage mechanism 3 is communicated on road branch 2
Return line component 4, and return line component 4 is connected to oiling case.In this way, when whole system pressure is more than safe pressure,
Pressure stabilizing aerial drainage mechanism 3 acts, and oil liquid flows back into oiling case by return line component 4；Patrol officer sees pressure stabilizing aerial drainage machine
3 movement of structure movement, illustrates that line pressure is excessively high, can carry out maintenance down in time, to protect equipment installation and associated safety personnel,
Compared to existing technologies, this application involves safety return-flow device can effectively reduce and deposited with pre- superpressure preventing operation risk
Increasing equipment stable operation cycle, the preferably personal safety of protection equipment installation and associated safety personnel.
Specifically, in embodiments of the present invention, conduit connection 1 is specially four-way conduit coupling, the connection of four-way pipeline
Part is connected to pump discharge, the first pipeline branch 2 respectively；Four-way conduit coupling is also communicated with the second pipeline branch 5 and third pipe
Road branch 6；Pressure gauge 7 is installed, third pipeline branch 6 is connected to instrument pipeline on second pipeline branch 5.
Specifically, in embodiments of the present invention, pressure stabilizing aerial drainage mechanism 3 includes：The safety being installed on the first pipeline branch 2
Overflow valve；For regulating and controlling the safety value set mechanism of the overflow safety pressure value of setting safety overflow valve.
Specifically, in embodiments of the present invention, return line component 4 includes：The pipeline master being connected to pressure stabilizing aerial drainage mechanism 3
Body；And it is connected to pipeline main body, and be connected to the auxiliary piping of oiling case；The shut-off valve and section being set in pipeline main body
Flow valve.
Specifically, in embodiments of the present invention, return line component 4 further includes：It is set on auxiliary piping, for preventing
The check-valves of liquid reflux；It is set on auxiliary piping, for calculating the flowmeter of fluid flow in auxiliary piping.
Specifically, in embodiments of the present invention, safety return-flow device further includes：It is excessively high for prompt person line pressure,
Need the warning note mechanism of maintenance down.
Specifically, in embodiments of the present invention, warning note mechanism includes the report for prompting staff to be overhauled
Alert sound ring portion；And the alarm for prompting staff to be overhauled flashes lamp group.
Specifically, in embodiments of the present invention, oil filter is additionally provided on return line component 4.
Specifically, in embodiments of the present invention, oil filter specifically includes：Filtrate housing is set in filtrate housing, and
The oil inlet and oil outlet being connected to return line component 4；Oil liquid filter core and distributor, and driving point are equipped in filtrate housing
Orchestration rotary driver, distributor are that rotary seal is plugged in the mandrel in oil liquid filter core chamber, and mandrel is close to one end of oil inlet
Outer peripheral surface be equipped with the fluting that communicates with oil inlet, it is logical that mandrel is equipped with the mandrel feed flow for being connected to distributor oil inlet
Road.
Specifically, in embodiments of the present invention, pressure sensor is additionally provided on return line component 4.
Specifically, in embodiments of the present invention, oil liquid temperature regulating and controlling mechanism is additionally provided on return line component 4.
Specifically, in embodiments of the present invention, heated at constant temperature ring set is additionally provided on return line component 4.
Specifically, in embodiments of the present invention, safety overflow valve includes：Valve body；Be set to the first hydraulic fluid port on valve body and
Second hydraulic fluid port；Sliding is set to the buffering valve pocket in valve body and separating the first hydraulic fluid port, the second hydraulic fluid port；It buffers in valve pocket and is equipped with and first
The main valve core cavity of hydraulic fluid port connection, and buffer valve pocket and be formed with cushion chamber with valve body；Trimmer valve put on be equipped with connection the first hydraulic fluid port and
The damp channel of cushion chamber；The main valve plug being crimped on main valve core cavity valve port；It is connected to the screw-casing of the other end of valve body, swivel nut
It is interior to be equipped with pressure regulating device, one end connection of pressure regulating device and main valve plug, the opening and closing for control bound core.
As described above, safety return-flow device provided in this embodiment, illustrates in more detail, by straight in vacuum pump outlet
Integrated four-way, overflow valve and pressure gauge 7 and return line component 4 are connect, vacuum pump and impulse pipeline are effectively protected；In vacuum pump
Outlet installation four-way, four-way branch away three branches, and wherein left and right branch installs pressure gauge 7 and overflow valve respectively, gives overflow
One safe pressure of valve, when whole system is normal, pressure gauge 7 plays indicative function, and overflow valve does not work；When pressure is more than safety pressure
Power, overflow valve will act, and flow back into oiling case through overflow line；Overflow valve events are seen in producers' inspection, are just said
Open conduit wiring hypertonia, needs maintenance down, to protect equipment installation and associated safety personnel.Compared to existing technologies,
This application involves safety return-flow device more efficiently protect vacuum pump, impulse pipeline and relevant device；It significantly reduces
With the presence of pre- superpressure preventing operation risk, largely increase the peace of the equipment stable cycle of operation and production related personnel
Entirely.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of safety return-flow device, which is characterized in that including：It is installed on the conduit connection of pump discharge；Connect with the pipeline
First pipeline branch of socket part connection；It is installed on the first pipeline branch road, for exporting liquid in the first pipeline branch
The pressure stabilizing aerial drainage mechanism of body；It is connected to the pressure stabilizing aerial drainage mechanism, and is connected to the return line component of oiling case.
2. safety return-flow device according to claim 1, which is characterized in that the conduit connection is specially four-way pipeline
Connector, the four-way conduit coupling are connected to pump discharge, the first pipeline branch respectively；The four-way conduit coupling
Also it is communicated with the second pipeline branch and third pipeline branch；The second pipeline branch road is equipped with pressure gauge, the third pipe
Road branch is connected to instrument pipeline.
3. safety return-flow device according to claim 1, which is characterized in that the pressure stabilizing aerial drainage mechanism includes：It is installed on
The safety overflow valve of the first pipeline branch road；For regulating and controlling the peace of the overflow safety pressure value of the setting safety overflow valve
Total head set mechanism.
4. safety return-flow device according to claim 1, which is characterized in that the return line component includes：With it is described
The pipeline main body of pressure stabilizing aerial drainage mechanism connection；And it is connected to the pipeline main body, and be connected to the auxiliary piping of oiling case；If
The shut-off valve and throttle valve being placed in the pipeline main body.
5. safety return-flow device according to claim 4, which is characterized in that the return line component further includes：Setting
In on the auxiliary piping, for preventing the check-valves of liquid reflux；It is set on the auxiliary piping, it is described auxiliary for calculating
Help the flowmeter of fluid flow in pipeline.
6. safety return-flow device according to claim 1, which is characterized in that the safety return-flow device further includes：For
Prompt person line pressure is excessively high, needs the warning note mechanism of maintenance down.
7. safety return-flow device according to claim 1, which is characterized in that be additionally provided with oil on the return line component
Liquid filter.
8. safety return-flow device according to claim 1, which is characterized in that be additionally provided with pressure on the return line component
Force snesor.
9. safety return-flow device according to claim 1, which is characterized in that be additionally provided with oil on the return line component
Liquid temperature regulating and controlling mechanism.
10. safety return-flow device according to claim 3, which is characterized in that the safety overflow valve includes：Valve body；If
The first hydraulic fluid port and the second hydraulic fluid port being placed on the valve body；Sliding is set in the valve body and separates first hydraulic fluid port, described
The buffering valve pocket of second hydraulic fluid port；The main valve core cavity being connected to first hydraulic fluid port, and the buffering are equipped in the buffering valve pocket
Valve pocket and valve body are formed with cushion chamber；The trimmer valve puts on logical equipped with the damping for being connected to first hydraulic fluid port and the cushion chamber
Road；The main valve plug being crimped on main valve core cavity valve port；It is connected to the screw-casing of the other end of the valve body, is equipped in the swivel nut
Pressure regulating device, the pressure regulating device are connect with one end of the main valve plug, the opening and closing for control bound core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101225.0A CN108895235A (en) | 2018-09-20 | 2018-09-20 | A kind of safety return-flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101225.0A CN108895235A (en) | 2018-09-20 | 2018-09-20 | A kind of safety return-flow device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108895235A true CN108895235A (en) | 2018-11-27 |
Family
ID=64360038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811101225.0A Pending CN108895235A (en) | 2018-09-20 | 2018-09-20 | A kind of safety return-flow device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108895235A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694019Y (en) * | 2004-01-07 | 2005-04-20 | 杭法兴 | Hydraulic overload protection device for press |
| CN201078362Y (en) * | 2006-12-14 | 2008-06-25 | 天津市华泰森淼生物工程技术有限公司 | Hydraulic pressure control system of integration supervoltage biological treatment equipment |
| CN203384139U (en) * | 2013-06-05 | 2014-01-08 | 浙江工商职业技术学院 | Inlet speed regulating loop |
| CN203962571U (en) * | 2014-05-19 | 2014-11-26 | 徐州压力机械有限公司 | A kind of pressure-releasing device for hydraulic-machine system |
| CN104196782A (en) * | 2014-09-18 | 2014-12-10 | 芜湖高昌液压机电技术有限公司 | Serially-connected composite throttling speed regulating loop for lifter |
| CN106286440A (en) * | 2016-09-30 | 2017-01-04 | 西南石油大学 | A kind of control system of telescopic downhole tractor based on hydraulic control |
-
2018
- 2018-09-20 CN CN201811101225.0A patent/CN108895235A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694019Y (en) * | 2004-01-07 | 2005-04-20 | 杭法兴 | Hydraulic overload protection device for press |
| CN201078362Y (en) * | 2006-12-14 | 2008-06-25 | 天津市华泰森淼生物工程技术有限公司 | Hydraulic pressure control system of integration supervoltage biological treatment equipment |
| CN203384139U (en) * | 2013-06-05 | 2014-01-08 | 浙江工商职业技术学院 | Inlet speed regulating loop |
| CN203962571U (en) * | 2014-05-19 | 2014-11-26 | 徐州压力机械有限公司 | A kind of pressure-releasing device for hydraulic-machine system |
| CN104196782A (en) * | 2014-09-18 | 2014-12-10 | 芜湖高昌液压机电技术有限公司 | Serially-connected composite throttling speed regulating loop for lifter |
| CN106286440A (en) * | 2016-09-30 | 2017-01-04 | 西南石油大学 | A kind of control system of telescopic downhole tractor based on hydraulic control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105275690B (en) | Fuel filter abnormal detector | |
| CN204114321U (en) | There is the pressure regulator of filter state detector | |
| CN208282995U (en) | A kind of pressure-detecting device and pressure detecting system | |
| CN108895235A (en) | A kind of safety return-flow device | |
| JPH0241441Y2 (en) | ||
| US3085432A (en) | Flow indicator | |
| CN208156473U (en) | A kind of automation equipment that flow control valve inspection loosens | |
| CN205938145U (en) | Intelligent pressure reducing valve | |
| CN204878934U (en) | Filtration, pressure regulating, safety cut -off close gas pressure regulator as an organic whole | |
| CN209607120U (en) | A kind of pipe leakage visualizing monitor warning device | |
| CN209885370U (en) | Filter device | |
| CN109826711A (en) | Aero-engine fuel oil supply system | |
| CN206092744U (en) | Hydraulic clutch fuel feeding and controlling means | |
| CN206804294U (en) | A kind of gear pump intelligent detection platform | |
| CN203162237U (en) | Gas pressure regulation valve | |
| CA3143329A1 (en) | Valves and control systems for pressure equalization and de-energization | |
| CN207641151U (en) | A kind of wafer type filter device for CNG pressure regulation metering pipelines | |
| KR200442170Y1 (en) | Underground governor | |
| CN110514334A (en) | A kind of electric eddy current dynamometer water system protective device | |
| CN205895767U (en) | Detecting system is carried to hydraulic pressure oil mass of freight train helping hand pump, orientation machine | |
| CN214743714U (en) | Valve function testing equipment suitable for various valves | |
| CN210239970U (en) | Sealed structure of washing | |
| JPS607770Y2 (en) | Filter cleaning device | |
| CN205372850U (en) | Multitube way remote control's central air conditioning equipment | |
| KR102520395B1 (en) | Measuring device for liquid flow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181127 |