CN209482265U - Gate Rapid door closer hydraulic damping speed-regulating system - Google Patents
Gate Rapid door closer hydraulic damping speed-regulating system Download PDFInfo
- Publication number
- CN209482265U CN209482265U CN201822000463.4U CN201822000463U CN209482265U CN 209482265 U CN209482265 U CN 209482265U CN 201822000463 U CN201822000463 U CN 201822000463U CN 209482265 U CN209482265 U CN 209482265U
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- Prior art keywords
- gate
- valve
- hydraulic
- door closer
- damping
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- Withdrawn - After Issue
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- 238000013016 damping Methods 0.000 title claims abstract description 71
- 239000003921 oil Substances 0.000 claims abstract description 96
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000002828 fuel tank Substances 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 230000033228 biological regulation Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000020169 heat generation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The utility model discloses a kind of gate Rapid door closer hydraulic damping speed-regulating systems, belong to sluice control system field in hydraulic and hydroelectric engineering, provide a kind of new hydraulic damping speed-regulating system that speed is closed for regulating gate during gate Rapid door closer.The utility model is on the basis of traditional winch hoist, traditional friction brakes damping action is replaced by using hydraulic damping mode, control is adjusted by the circuit flow to hydraulic oil in the damping oil circuit where hydraulic motor, damping speed regulation is carried out to the Rapid door closer process of gate, and then regulating gate closes speed.The utility model avoids the problem of leading to misfunctioning of brake because of frictional heat generation simultaneously；Meanwhile by the way that corresponding normal opening and closing access, Rapid door closer throttle passage and end throttle access is arranged, the on-off of respective channels can be controlled as needed, and then realize the quick adjusting of damping brake effect, sectional, point fast regulating gate close speed.
Description
Technical field
The utility model relates to sluice control system field in hydraulic and hydroelectric engineering more particularly to a kind of gate Rapid door closers
Hydraulic damping speed-regulating system.
Background technique
Currently, the winding type stop gate that quick emergency gate uses conventional mechanical to adjust the speed in hydraulic and hydroelectric engineering at home
Headstock gear carries out the control of gate Rapid door closer using hydraulic headstock gear.The winding type stop gate headstock gear of mechanical speed governors uses
Centrifugal pendulum cone brake is adjusted the speed, and since cone brake performance of ventilation and heat dispersion is poor, brake(-holder) block and brake drum are easy height
Temperature damage, causes Fluctuation of Dynamic Friction larger, influences damping speed regulation effect, serious or even initiation safety accident；Therefore current one
As apply on the gate of smaller tonnage.For hydraulic headstock gear then because components are few, it is fast to be usually used in powerplant intakes for high reliablity
Fast emergency gate operation, but involve great expense, hydraulic cylinder length is limited by process equipment limitation, and range is restricted,
Therefore applicability is poor.
Utility model content
The technical issues of the utility model solves is to provide a kind of new regulating gate during being used for gate Rapid door closer
Close the hydraulic damping speed-regulating system of speed.
The technical scheme adopted by the utility model to solve the technical problem is as follows: gate Rapid door closer hydraulic damping speed regulation system
System, the gate Rapid door closer are controlled by winch hoist and are opened and closed, the gate Rapid door closer hydraulic damping speed-regulating system packet
Hydraulic motor and hydraulic oil pipe system are included, the deceleration mechanism driving in the rotation axis and winch hoist of the hydraulic motor connects
It connects；The hydraulic oil pipe system include fuel tank and damping oil circuit, it is described damping oil circuit arrival end and outlet end respectively with fuel tank
Connection, the hydraulic motor are set in damping oil circuit, are additionally provided in damping oil circuit logical with the concatenated control of hydraulic motor
Road, the control access include at least normal opening and closing access, Rapid door closer throttle passage and the end throttle being arranged in parallel
Access is provided with the first gate valve in normally opening and closing access, the second plate has been arranged in series in Rapid door closer throttle passage
Valve and first throttle valve are provided with second throttle in the throttle access of end.
Further, the hydraulic oil pipe system further includes control oil circuit, the arrival end and fuel tank of the control oil circuit
Connection；It is provided with kinetic pump, the first check valve and electromagnetic ball valve group in control oil circuit, the electromagnetic ball valve group is set including parallel connection
The first Solenoid ball valve and the second Solenoid ball valve set, first Solenoid ball valve are correspondingly connected with the first gate valve and are used to control
The working condition of first gate valve, second Solenoid ball valve and the second gate valve are correspondingly connected with and are used to control the second gate valve
Working condition.
Further, first Solenoid ball valve and second Solenoid ball valve are two-position three-way valve, at two three
In port valve include oil-supplying port, oil return port and fuel-displaced port, the downstream oil communication of the oil-supplying port and the first check valve,
The oil return port is connected to fuel tank, and the fuel-displaced port is connected to the control port on corresponding gate valve.
Further, being disposed with accumulator and second one-way valve between the first check valve and electromagnetic ball valve group.
Further, closing the running of hydraulic power oil direction in the corresponding damping oil circuit of a process with gate as reference, control
Access is located at the damping oil road in hydraulic motor downstream；It is arranged on control oil circuit between second one-way valve and electromagnetic ball valve group
There are connection branch, the damping oil communication between the connection branch and hydraulic motor and control access；In connected component Lu Shangshe
Being equipped with only allows to control the third check valve that oil circuit is connected from damping oil road direction.
Further, being provided with the relief valve in parallel with control access both ends in damping oil circuit.
Further, further including control system, stroke detection sensor, the row are provided on winch hoist
Journey detection sensor is connected with control system signal, and the control system is connected with the first solenoid valve and second solenoid valve signal.
Further, the kinetic pump is hand-rail type kinetic pump.
Further, the rotation axis of the hydraulic motor and the high speed shaft within the organization that slows down are sequentially connected.
Further, the size of the fuel tank meets the radiating requirements of hydraulic oil in fuel tank.
The beneficial effects of the utility model are: the utility model is to pass through on the basis of traditional winch hoist
Traditional friction brakes damping action is replaced using hydraulic damping mode, by the damping oil circuit where hydraulic motor
The circuit flow of hydraulic oil adjusts control, carries out damping speed regulation to the Rapid door closer process of gate, and then regulating gate closes speed
Degree.Since the utility model generates damping action using hydraulic motor and corresponding damping oil circuit, rub relative to using
For erasing brake, the problem of leading to misfunctioning of brake because of frictional heat generation is avoided；Meanwhile it is corresponding normal by being arranged
Access, Rapid door closer throttle passage and end throttle access are opened and closed, the on-off of respective channels can be controlled as needed, in turn
Realize the quick adjusting of damping brake effect, sectional, point fast regulating gate close speed.In addition, in the utility model into
One step is realized using control oil circuit by the corresponding control oil circuit of setting and carries out on-off control to corresponding control access；Simultaneously
Further by setting connection branch, can press by the high pressure liquid pressure oil generated in damping oil circuit to corresponding gate valve,
So that control oil circuit can realize the control to gate valve under lower pressure.
Detailed description of the invention
Fig. 1 is that hydraulic motor is opened with winding type in gate Rapid door closer hydraulic damping speed-regulating system described in the utility model
Close the connection schematic diagram of the deceleration mechanism in machine；
Fig. 2 is the connection relationship diagram of hydraulic oil pipe system in the utility model；
Fig. 3 is the connection relationship diagram of Solenoid ball valve, and the Solenoid ball valve is two-position three-way valve；
Fig. 4 is the connection relationship diagram of gate valve；
In the figure, it is marked as hydraulic motor 1, deceleration mechanism 2, fuel tank 3, damping oil circuit 4, normal opening and closing access 5, Rapid door closer
Throttle passage 6, end throttle access 7, the first gate valve 8, the second gate valve 9, first throttle valve 10, second throttle
11, control oil circuit 12, kinetic pump 13, the first check valve 14, the first Solenoid ball valve 15, the second Solenoid ball valve 16, oil-supplying port 17,
Oil return port 18, fuel-displaced port 19, control port 20, accumulator 21, second one-way valve 22, connection branch 23, third check valve
24, relief valve 25, oil-supplying port 26, fuel-displaced port 27, mounting base 28.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
Shown in as shown in Figure 1 to Figure 4, gate Rapid door closer hydraulic damping speed-regulating system described in the utility model, the lock
Door Rapid door closer is controlled by winch hoist and is opened and closed, i.e., mating accordingly to be provided with winch hoist；The utility model institute
Stating gate Rapid door closer hydraulic damping speed-regulating system includes hydraulic motor 1 and hydraulic oil pipe system, the rotation of the hydraulic motor 1
Deceleration mechanism 2 in axis and winch hoist is sequentially connected；The hydraulic oil pipe system includes fuel tank 3 and damping oil circuit 4, institute
The arrival end and outlet end for stating damping oil circuit 4 are connected to fuel tank 3 respectively, and the hydraulic motor 1 is set in damping oil circuit 4,
It is additionally provided in damping oil circuit 4 and includes at least and be arranged in parallel just with the concatenated control access of hydraulic motor 1, the control access
Often opening and closing access 5, Rapid door closer throttle passage 6 and end throttle access 7 are provided with first in normally opening and closing access 5
Gate valve 8 has been arranged in series the second gate valve 9 and first throttle valve 10 in Rapid door closer throttle passage 6, and in end, throttling subtracts
Second throttle 11 is provided in fast access 7.
Specifically, hydraulic motor 1 is installed in corresponding mounting base 28 referring to shown in attached drawing 1, hydraulic motor 1 turns
Moving axis directly with deceleration mechanism 2 be sequentially connected, specifically then preferably setting hydraulic motor 1 rotation axis directly with deceleration mechanism 2
Interior high speed shaft coaxial transmission connection, can be improved the damping brake effect of 1 pair of deceleration mechanism 2 of hydraulic motor in this way.
Above-mentioned the utility model can realize respectively difference to normal opening and closing, quick closedown and the quick closedown end of gate
Controlled load case, specific operating condition process are as follows:
1, when gate normally opens and closes, all normally opens of oil circuit 4 are damped, hydraulic motor is reversed or positive oil suction is empty
Turn, entire damp does not build pressure in oil circuit 4, smaller efficiency caused by recycling there is only each part friction and oil liquid without pressure in system
Loss；
2, when gate quick closedown, the first gate valve 8 in normal opening and closing access 5 in control damping oil circuit 4 is closed,
The built-in pressure of oil circuit 4 is damped, pressure oil flows back to fuel tank 3 after depressurizing by Rapid door closer throttle passage 6 and end throttle access 7
It realizes circulation, and then generates damping action, the control for closing speed to gate is realized with this.In addition the closing velocity of gate may be used also
Further pass through Rapid door closer throttle passage 6 and first throttle valve 10 and second throttle in end throttle access 7
11 aperture regulation is controlled.
3, when gate quick closedown is to close to ground sill, further control is quickly closed on the basis of above-mentioned second of operating condition
The second gate valve 9 in door throttle passage 6 is closed, and is damped and is further built pressure in oil circuit 4, and pressure oil can only be throttled by end to be subtracted
Fast access 7 flows back to fuel tank 3 after depressurizing realizes circulation, further increases damping action, and realization closes the further of speed to gate
Slow down and controls；In this way can speed of regulating gate when closing end further decrease, and then prevent gate from quickly hitting with ground sill
The problem of hitting；More specifically, the aperture regulation that can also further pass through second throttle 11, realizes the speed that an end is closed to gate
Degree adjusts control.
More specifically, hydraulic oil pipe system described in the utility model still further comprises control oil circuit 12, the control
The arrival end of oil circuit 12 is connected to fuel tank 3；Kinetic pump 13, the first check valve 14 and Solenoid ball valve are provided in control oil circuit 12
Group, the electromagnetic ball valve group include the first Solenoid ball valve 15 and the second Solenoid ball valve 16 being arranged in parallel, first electromagnetic ball
Valve 15 and the first gate valve 8 are correspondingly connected with and for controls the working condition of the first gate valve 8, second Solenoid ball valve 16 and
Second gate valve 9 is correspondingly connected with and the working condition for controlling the second gate valve 9.Pass through the corresponding control oil circuit of setting
12, using corresponding first Solenoid ball valve 15 and the second Solenoid ball valve 16 in control oil circuit 12 respectively to the first gate valve 8 and the
The on-off of two gate valves 9 is controlled.Certainly, Solenoid ball valve can then be controlled by corresponding electric signal.
Specifically, the first gate valve 8 and the second gate valve 9 in the utility model are respectively provided with referring to shown in attached drawing 4
Control port 21, oil-supplying port 26 and fuel-displaced port 27, wherein control port 21 is for controlling oil-supplying port 26 and oil outlet
The port of 27 on-off of mouth, and by the on-off of control oil-supplying port 26 and fuel-displaced port 27, that is, it realizes to corresponding control access
On-off control.And first throttle valve 10 described in the utility model and second throttle 11, it is preferably to be adopted as adjustable
The valve for saving opening size, by adjusting its opening size to realize that the adjusting to hydraulic damping size controls.
More specifically, referring to shown in hair attached drawing 3, the first Solenoid ball valve 15 and the second Solenoid ball valve in the utility model
16 are preferably arranged to two-position three-way valve, on two-position three-way valve include oil-supplying port 17, oil return port 18 and fuel-displaced port 19,
The downstream oil communication of the oil-supplying port 17 and the first check valve 14, the oil return port 18 is connected to fuel tank 3, described fuel-displaced
Port 19 is connected to the control port 20 on corresponding gate valve.There are two types of working conditions for above-mentioned two-position three-way valve tool: working as fuel feeding end
Mouthfuls 17 with fuel-displaced port 19 when be connected to, controls and passes through the pressure oil with certain pressure that kinetic pump 13 generates in oil circuit 12 from confession
Oily port 17 feeds and is connected to by fuel-displaced port 19 with the control port 20 on corresponding gate valve, and then drives corresponding plate
Valve is closed；And when fuel-displaced port 19 is connected to oil return port 18, the pressure oil of the control port 20 on corresponding gate valve is from out
Oily port 19 feeds and from 18 reflux pressure letdown of oil return port, and corresponding gate valve is opened.
In addition, above-mentioned kinetic pump 13 be for control oil circuit 12 in generate have certain pressure pressure oil, using as
Control the initial driving force of gate valve.Specifically, in order to maintain in control oil circuit 12 always with the pressure oil of certain pressure, this reality
Accumulator 21 and second one-way valve 22 further are disposed between the first check valve 14 and electromagnetic ball valve group in novel；
Wherein the accumulator 21 is the device that certain accumulation of energy can be carried out to pressure oil.Specifically, the accumulator 21 may be configured as
Pressure vessel is provided with the gas pressure chamber of certain volume inside it, realizes accumulation of energy by compressed gas.More specifically, exist
It is above-mentioned be provided with accumulator 21 in the case where, the kinetic pump 13 in the utility model is further preferably set as hand-rail type power
Pump.
In addition, closing the running of hydraulic power oil direction in the corresponding damping oil circuit 4 of a process with gate as reference, the utility model
In control access be further preferably set be located on the damping oil circuit 4 in 1 downstream of hydraulic motor；Simultaneously in second one-way valve 22 and electricity
Connection branch 23 is provided on control oil circuit 12 between magnetic ball valve group, the connection branch 23 and hydraulic motor 1 and control are logical
Damping oil circuit 4 between road is connected to；Being provided on connection branch 23 only allows from damping oil circuit 4 to the control conducting of oil circuit 12
Third check valve 24.The benefit being arranged in this way is, gate close door it is initial when, because of the oil-supplying port 26 on the first gate valve 8
Pressure difference between fuel-displaced port 27 is very small, therefore only needs to generate lesser oil pressure in control oil circuit 12, can be driven the
One gate valve 8 is closed；And after the first gate valve 8 is closed, it will in the damping oil circuit 4 between hydraulic motor 1 and control access
Build pressure；And can be further applied to oil pressure in the control port 20 of the first gate valve 8 by connection branch 23 after building pressure, with
Ensure in the case that the pressure difference between oil-supplying port 26 and fuel-displaced port 27 subsequent on the first gate valve 8 is gradually increased the
Control port 20 on one gate valve 8 has enough pressure to ensure that the first gate valve 8 remains off.In this way,
It is effectively reduced oil pressure pressure initial in control oil circuit 12.
In addition, the utility model is further provided with the relief valve 25 in parallel with control access both ends in damping oil circuit 4；
Relief valve 25 is for ensuring to play the role of pressure release when the pressure difference at control access both ends is excessive, to avoid in corresponding pipeline
Oil pressure superpressure.
In addition, at work due to gate Rapid door closer hydraulic damping speed-regulating system described in the utility model, it is hydraulic
Hydraulic oil in oil piping system will generate warming phenomenon；In order to avoid high oil temperature, can further pass through in the utility model
The size of fuel tank 3 is set, with meet store enough hydraulic oil with for recycle and in fuel tank 3 hydraulic oil can have it is enough
Heat dissipation effect.
In addition, being further additionally provided with corresponding control system in order to realize automation control in the utility model, rolling up
It raises and is provided with stroke detection sensor 26 on formula headstock gear, the stroke detection sensor 26 is connected with control system signal, institute
Control system is stated to be connected with the first solenoid valve 15 and 16 signal of second solenoid valve.Gate is detected by stroke detection sensor 26
Path increment, and the first solenoid valve 15 and the second electromagnetism answered according to the gate path increment of detection by control system control automatic phasing
Valve 16 is controlled, and then realizes the automatic control to the first gate valve 8 and the second gate valve 9.Specifically, above-mentioned control system
For PLC control system, and the PLC control system can be shared with control system used in winch hoist.
Claims (10)
1. gate Rapid door closer hydraulic damping speed-regulating system, the gate Rapid door closer is controlled by winch hoist and is opened and closed,
Be characterized in that: the gate Rapid door closer hydraulic damping speed-regulating system includes hydraulic motor (1) and hydraulic oil pipe system, the liquid
Deceleration mechanism (2) transmission connection in the rotation axis and winch hoist of pressure motor (1)；The hydraulic oil pipe system includes oil
Case (3) and damping oil circuit (4), the arrival end of damping oil circuit (4) and outlet end are connected to fuel tank (3) respectively, described hydraulic
Motor (1) is set in damping oil circuit (4), is additionally provided in damping oil circuit (4) logical with hydraulic motor (1) concatenated control
Road, the control access include at least normal opening and closing access (5), Rapid door closer throttle passage (6) and the end segment being arranged in parallel
It flows deceleration access (7), the first gate valve (8) is provided in normally opening and closing access (5), in Rapid door closer throttle passage (6)
It has been arranged in series the second gate valve (9) and first throttle valve (10), has been provided with the second throttling in end throttle access (7)
Valve (11).
2. gate Rapid door closer hydraulic damping speed-regulating system as described in claim 1, it is characterised in that: the hydraulic circuit system
System further includes control oil circuit (12), and the arrival end of control oil circuit (12) is connected to fuel tank (3)；It is set in control oil circuit (12)
It is equipped with kinetic pump (13), the first check valve (14) and electromagnetic ball valve group, the electromagnetic ball valve group includes the first electricity being arranged in parallel
Magnetic ball valve (15) and the second Solenoid ball valve (16), first Solenoid ball valve (15) is correspondingly connected with the first gate valve (8) to be used in combination
In the working condition of control the first gate valve (8), second Solenoid ball valve (16) is correspondingly connected with the second gate valve (9) to be used in combination
In the working condition of control the second gate valve (9).
3. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 2, it is characterised in that: first electromagnetic ball
Valve (15) and second Solenoid ball valve (16) are two-position three-way valve, include oil-supplying port (17) on two-position three-way valve, return
Oily port (18) and fuel-displaced port (19), the downstream oil communication of the oil-supplying port (17) and the first check valve (14) are described
Oil return port (18) is connected to fuel tank (3), and the fuel-displaced port (19) is connected to the control port (20) on corresponding gate valve.
4. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 2, it is characterised in that: in the first check valve
(14) accumulator (21) and second one-way valve (22) are disposed between electromagnetic ball valve group.
5. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 4, it is characterised in that: close a process with gate
Running of hydraulic power oil direction in corresponding damping oil circuit (4) is reference, and control access is located at the damping oil in hydraulic motor (1) downstream
On road (4)；Connection branch (23), institute are provided on control oil circuit (12) between second one-way valve (22) and electromagnetic ball valve group
Connection branch (23) is stated to be connected to the damping oil circuit (4) between hydraulic motor (1) and control access；It is set in connection branch (23)
It is equipped with the third check valve (24) for only allowing to be connected from damping oil circuit (4) to control oil circuit (12).
6. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 4, it is characterised in that: in damping oil circuit (4)
In be provided with the relief valve in parallel with control access both ends (25).
7. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 4, it is characterised in that: further include control system
System, is provided with stroke detection sensor (26), the stroke detection sensor (26) and control system on winch hoist
Signal is connected, and the control system is connected with the first Solenoid ball valve (15) and the second Solenoid ball valve (16) signal.
8. gate Rapid door closer hydraulic damping speed-regulating system as claimed in claim 4, it is characterised in that: the kinetic pump (13)
For hand-rail type kinetic pump.
9. gate Rapid door closer hydraulic damping speed-regulating system as described in claim 1, it is characterised in that: the hydraulic motor
(1) the high speed shaft in rotation axis and deceleration mechanism (2) is sequentially connected.
10. gate Rapid door closer hydraulic damping speed-regulating system as described in claim 1, it is characterised in that: the fuel tank (3)
Size meets the radiating requirements of fuel tank (3) interior hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000463.4U CN209482265U (en) | 2018-11-30 | 2018-11-30 | Gate Rapid door closer hydraulic damping speed-regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000463.4U CN209482265U (en) | 2018-11-30 | 2018-11-30 | Gate Rapid door closer hydraulic damping speed-regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209482265U true CN209482265U (en) | 2019-10-11 |
Family
ID=68117422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822000463.4U Withdrawn - After Issue CN209482265U (en) | 2018-11-30 | 2018-11-30 | Gate Rapid door closer hydraulic damping speed-regulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209482265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371920A (en) * | 2018-11-30 | 2019-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Gate Rapid door closer hydraulic damping speed-regulating system |
-
2018
- 2018-11-30 CN CN201822000463.4U patent/CN209482265U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371920A (en) * | 2018-11-30 | 2019-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Gate Rapid door closer hydraulic damping speed-regulating system |
| CN109371920B (en) * | 2018-11-30 | 2023-11-21 | 中国电建集团成都勘测设计研究院有限公司 | Hydraulic damping speed regulating system for quick closing gate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191011 Effective date of abandoning: 20231121 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191011 Effective date of abandoning: 20231121 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |